Certified Medical Device Reprocessing Technician (CMDRT) — Questions and Answers

Question 1: What is the primary responsibility of a medical device reprocessing technician?

Diagnosing patient infections
Prescribing cleaning chemicals for the department
Performing surgical procedures
Ensuring reusable medical devices are properly cleaned, disinfected or sterilized, and safe for patient use (Correct answer)

Correct answer: Ensuring reusable medical devices are properly cleaned, disinfected or sterilized, and safe for patient use

The core responsibility of the CMDRT is to ensure that every reusable medical device undergoes the complete reprocessing cycle — from point-of-use pre-cleaning through final sterility verification — so that devices are safe when used on the next patient.

Question 2: What should SPD do if a biological indicator from an implant sterilization load returns a positive (growth) result?

Re-sterilize the implant and release it without additional BI testing
Allow the surgeon to decide whether to use the implant based on clinical need
Quarantine and recall the load; do not use the implant until the issue is investigated and resolved (Correct answer)
Release the implant if all chemical indicators in the load passed

Correct answer: Quarantine and recall the load; do not use the implant until the issue is investigated and resolved

A positive BI result indicates a potential sterilization failure; the entire load must be quarantined and recalled, and the implant must not be used until a thorough investigation is completed and the issue resolved.

Question 3: Which of the following is an example of a high-level disinfectant approved for use in Canadian healthcare facilities?

Household bleach at standard dilution
Ortho-phthalaldehyde (OPA) (Correct answer)
Quaternary ammonium compounds
Isopropyl alcohol 70%

Correct answer: Ortho-phthalaldehyde (OPA)

OPA is a widely used high-level disinfectant in Canadian healthcare. It is effective against a broad spectrum of microorganisms, has a shorter contact time than glutaraldehyde, and is less irritating to mucous membranes.

Question 4: A technician is manually cleaning a flexible colonoscope. After thoroughly brushing all accessible channels while the scope is fully submerged in an enzymatic solution, what is the critical next step before moving to the final rinse stage?

Perform a second leak test to ensure the brushing did not cause damage.
Actuate all movable parts and raise/lower elevators to dislodge trapped debris. (Correct answer)
Flush the channels with 70% isopropyl alcohol to begin disinfection.
Visually inspect the scope's exterior for damage with a magnifying lamp.

Correct answer: Actuate all movable parts and raise/lower elevators to dislodge trapped debris.

After the initial brushing of the channels, it is critical to actuate any moving parts, such as the elevator on a duodenoscope or angulation controls, while the scope is still submerged in the cleaning solution. This action helps to dislodge and remove bioburden that may be trapped in these complex mechanical areas, ensuring they are thoroughly cleaned.

Question 5: What is a biological indicator (BI) and how is it used in steam sterilization monitoring?

A temperature recording device
A pH test of the steam
A preparation of highly resistant bacterial spores (Geobacillus stearothermophilus) used to directly challenge the sterilization process and confirm microbial kill (Correct answer)
A colour-changing tape on the outside of packages

Correct answer: A preparation of highly resistant bacterial spores (Geobacillus stearothermophilus) used to directly challenge the sterilization process and confirm microbial kill

Biological indicators contain a known population of Geobacillus stearothermophilus spores, which are among the most resistant microorganisms to moist heat. A negative BI result (no growth after incubation) confirms the sterilization process was lethal.

Question 6: A medical device reprocessing department is deciding between Ethylene Oxide (EO) and Vaporized Hydrogen Peroxide (VHP) for a new low-temperature sterilizer. A key consideration is the post-cycle processing time. What is a primary disadvantage of EO compared to VHP in this regard?

EO sterilizers require more frequent maintenance.
EO requires a lengthy aeration period to remove toxic residues. (Correct answer)
EO cannot be used for devices with long lumens.
EO cycles are significantly hotter.

Correct answer: EO requires a lengthy aeration period to remove toxic residues.

Ethylene Oxide is a toxic and carcinogenic gas that can be absorbed by certain materials. Therefore, after the sterilization cycle, a mandatory aeration period (which can last for several hours) is required to allow the residual gas to dissipate to safe levels before the devices can be handled or used. VHP does not have this requirement.

Question 7: What is the role of an infection prevention and control (IPAC) committee in relation to the reprocessing department?

The IPAC committee has no authority over reprocessing
The IPAC committee manages hospital finances
The IPAC committee only handles patient complaints
The IPAC committee provides oversight, policy development, surveillance, and outbreak investigation support for the reprocessing department (Correct answer)

Correct answer: The IPAC committee provides oversight, policy development, surveillance, and outbreak investigation support for the reprocessing department

The IPAC committee provides governance and expert guidance for reprocessing activities, including developing policies, reviewing practices, investigating incidents, and ensuring compliance with national and provincial standards.

Question 8: According to CSA Z314-18, what is the very first step in the decontamination process for a soiled reusable medical device?

Application of a disinfectant spray
Immediate sterilization
Thorough cleaning and rinsing (Correct answer)
Ultrasonic cleaning

Correct answer: Thorough cleaning and rinsing

The first and most critical step in the decontamination process is thorough cleaning and rinsing to remove all visible soil and bioburden. If a device is not properly cleaned, subsequent disinfection or sterilization processes can be rendered ineffective. This principle is a cornerstone of medical device reprocessing standards like CSA Z314-18.

Question 9: Why is surveillance of reprocessing-related infections important?

It is not important and wastes resources
Only the manufacturer needs to track infections
Surveillance enables early detection of reprocessing failures, identification of trends, and implementation of corrective actions before widespread patient harm occurs (Correct answer)
Surveillance is only performed during accreditation visits

Correct answer: Surveillance enables early detection of reprocessing failures, identification of trends, and implementation of corrective actions before widespread patient harm occurs

Ongoing surveillance tracks infections that may be linked to reprocessed devices, enabling early identification of reprocessing failures, process improvements, and prevention of further patient harm.

Question 10: What role does hand hygiene play in infection prevention for reprocessing technicians?

It is the single most effective measure for preventing the transmission of healthcare-associated infections (Correct answer)
It is only necessary before eating
It replaces the need for gloves in the decontamination area
It is only required at the beginning of a shift

Correct answer: It is the single most effective measure for preventing the transmission of healthcare-associated infections

Hand hygiene — through handwashing with soap and water or using alcohol-based hand rub — is recognized worldwide as the most effective single measure to prevent healthcare-associated infection transmission, including in reprocessing departments.

Question 11: What is the correct sequence of steps in the decontamination workflow?

Pre-cleaning at point of use → Transport → Cleaning → Rinsing → Disinfection/Sterilization (Correct answer)
Transport → Sterilization → Cleaning → Inspection
Packaging → Sterilization → Cleaning → Storage
Sterilization → Cleaning → Disinfection → Rinsing

Correct answer: Pre-cleaning at point of use → Transport → Cleaning → Rinsing → Disinfection/Sterilization

The standard decontamination workflow follows a logical progression: pre-cleaning at point of use to prevent soil from drying, safe transport to the reprocessing area, thorough cleaning, rinsing, and then disinfection or sterilization.

Question 12: What are healthcare-associated infections (HAIs) and how does reprocessing help prevent them?

Infections that patients had before admission
Infections that only affect healthcare workers
Infections acquired during or as a result of healthcare delivery that were not present at the time of admission (Correct answer)
Infections caused by allergic reactions to medications

Correct answer: Infections acquired during or as a result of healthcare delivery that were not present at the time of admission

HAIs are infections that patients acquire during their healthcare experience. Improperly reprocessed medical devices are a recognized source of HAIs, making effective reprocessing a critical infection prevention strategy.

Question 13: How should instruments with lumens (channels) be handled at the point of use?

Left open and dry until returned to the SPD
Flushed with water or enzymatic solution to prevent lumen soil from drying (Correct answer)
Autoclaved at the point of care before transport
Capped immediately to prevent contamination of the lumen

Correct answer: Flushed with water or enzymatic solution to prevent lumen soil from drying

Lumened instruments should be flushed at the point of use to prevent organic material from drying inside channels, where it is extremely difficult to remove during cleaning.

Question 14: What type of water should be used for the final rinse of instruments after cleaning?

Saline solution
Distilled or treated water meeting CSA specifications (Correct answer)
Soapy water
Tap water

Correct answer: Distilled or treated water meeting CSA specifications

The final rinse should use distilled, deionized, or reverse-osmosis treated water to prevent mineral deposits (spotting) on instruments and to avoid introducing contaminants that may be present in tap water.

Question 15: What is the purpose of the conditioning phase in a prevacuum sterilizer?

To remove air from the chamber through alternating vacuum pulls and steam pulses, ensuring complete steam penetration to all surfaces (Correct answer)
To dry the instruments before the exposure phase
To test the sterilizer's alarm system
To cool the instruments before sterilization

Correct answer: To remove air from the chamber through alternating vacuum pulls and steam pulses, ensuring complete steam penetration to all surfaces

The conditioning phase uses multiple cycles of vacuum (pulling air out) and steam injection (displacing remaining air) to achieve thorough air removal. Trapped air is the primary enemy of steam sterilization as it prevents steam contact.

Question 16: What PPE is required for staff working in the decontamination area?

Only gloves
Street clothes with a lab coat
Gloves, gown, face protection (mask and eye shield or face shield), and waterproof footwear (Correct answer)
Surgical scrubs only

Correct answer: Gloves, gown, face protection (mask and eye shield or face shield), and waterproof footwear

Staff in the decontamination area are exposed to potentially infectious materials and chemical cleaning agents. Full PPE including heavy-duty gloves, fluid-resistant gown, face protection, and waterproof footwear is required per CSA and occupational health standards.

Question 17: What is the chain of infection, and why is it important in medical device reprocessing?

A ranking system for infection severity
A model describing the six links required for infection transmission: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host (Correct answer)
A method for storing instruments in sequence
A chain used to secure biohazard containers

Correct answer: A model describing the six links required for infection transmission: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host

The chain of infection describes the six elements needed for disease transmission. Medical device reprocessing breaks this chain by eliminating the infectious agent on devices (reservoir) and preventing contaminated instruments from becoming a mode of transmission.

Question 18: What packaging materials are acceptable for hydrogen peroxide gas plasma sterilization?

Cotton muslin wraps
Standard paper-plastic peel pouches
Aluminum foil containers
Non-cellulose packaging such as polypropylene (Tyvek) pouches and non-woven polypropylene wraps specifically validated for the sterilizer (Correct answer)

Correct answer: Non-cellulose packaging such as polypropylene (Tyvek) pouches and non-woven polypropylene wraps specifically validated for the sterilizer

Because cellulose absorbs hydrogen peroxide and interferes with the sterilization process, only non-cellulose packaging materials validated by the sterilizer manufacturer can be used. This typically means Tyvek or polypropylene-based materials.

Question 19: What is the primary purpose of a medical device's 'unique device identifier' (UDI)?

To enable adequate identification and traceability of devices throughout their distribution and use (Correct answer)
To track reimbursement billing codes
To certify that a device has passed quality inspection
To indicate the sterilization method required

Correct answer: To enable adequate identification and traceability of devices throughout their distribution and use

The FDA's UDI system enables standardized identification and traceability of medical devices through the supply chain and in patient records.

Question 20: A new type of rigid container system is purchased. According to the CSA Z314-18 standard, what must be documented before this container is put into routine use?

Validation and verification of the manufacturer's instructions for use (IFU) within the facility's equipment. (Correct answer)
The date it was received from the vendor.
The cost of the container system compared to the old one.
Staff preference survey results for the new container.

Correct answer: Validation and verification of the manufacturer's instructions for use (IFU) within the facility's equipment.

Before any new medical device or reprocessing equipment is used, the facility must verify and validate that the manufacturer's instructions for use (IFU) can be successfully followed with their own equipment and processes. This ensures the item can be reliably reprocessed to be safe for patient use and this process must be documented.

Question 21: When using an Automated Endoscope Reprocessor (AER) for high-level disinfection, which of the following sets of tasks must the technician perform before loading the endoscope into the machine?

Packaging the endoscope in a peel pouch and adding a chemical indicator.
Drying the channels with compressed air and documenting the cycle parameters.
Testing the MEC of the rinse water and initiating the thermal disinfection phase.
Point-of-use pre-cleaning, leak testing, and thorough manual cleaning. (Correct answer)

Correct answer: Point-of-use pre-cleaning, leak testing, and thorough manual cleaning.

An AER automates the high-level disinfection, rinsing, and drying stages, but it does not replace the essential manual preparation steps. [18, 24] Meticulous manual cleaning is the most critical step in the entire process to remove bioburden. [24] Leak testing is also performed before immersion to prevent costly damage to the endoscope. [5] If it is not clean, it cannot be high-level disinfected.

Question 22: What is the significance of national standards (CSA Z314.8) for medical device reprocessing in Canada?

CSA standards only apply to manufacturing facilities
CSA standards are optional suggestions only
CSA Z314.8 provides the nationally recognized framework for safe and effective medical device reprocessing, referenced by regulators, accreditors, and courts as the standard of care (Correct answer)
CSA standards are only relevant in Ontario

Correct answer: CSA Z314.8 provides the nationally recognized framework for safe and effective medical device reprocessing, referenced by regulators, accreditors, and courts as the standard of care

CSA Z314.8 is the primary Canadian standard governing medical device reprocessing in healthcare facilities. It is referenced by provincial health authorities, Accreditation Canada, and serves as the benchmark for the standard of care in legal proceedings.

Question 23: In the chain of infection, what role does a contaminated surgical instrument play?

Susceptible host.
Mode of transmission. (Correct answer)
Portal of exit.
Infectious agent.

Correct answer: Mode of transmission.

The chain of infection consists of six links. A contaminated instrument serves as a vehicle, or fomite, that transfers the infectious agent from the reservoir to the susceptible host. This makes it the 'mode of transmission'. The infectious agent is the pathogen itself, not the object carrying it.

Question 24: Why is it important to keep contaminated instruments moist during transport to the reprocessing area?

To make them easier to count
To reduce the weight of the instruments
To prevent organic soil from drying and becoming harder to remove (Correct answer)
To sterilize them during transport

Correct answer: To prevent organic soil from drying and becoming harder to remove

Keeping instruments moist prevents blood, tissue, and other organic materials from drying onto surfaces. Dried soil is significantly harder to clean, can form biofilm, and may compromise subsequent disinfection or sterilization.

Question 25: What is the significance of prion diseases (such as CJD) for medical device reprocessing?

Prion diseases are not transmissible through medical devices
Prions are abnormal proteins that are extremely resistant to standard disinfection and sterilization methods, requiring special reprocessing protocols (Correct answer)
Prions are easily destroyed by routine sterilization
Standard HLD is sufficient for prion decontamination

Correct answer: Prions are abnormal proteins that are extremely resistant to standard disinfection and sterilization methods, requiring special reprocessing protocols

Prions are misfolded proteins that cause fatal neurological diseases and are extraordinarily resistant to conventional disinfection and sterilization methods. Instruments potentially contaminated with prions require special reprocessing protocols or may need to be destroyed.

Question 26: What is the sequential wrapping technique and why is it recommended?

Wrapping instruments in newspaper before sterilization
Using one very thick layer of wrap instead of two thinner ones
Using two layers of sterilization wrap applied in separate, sequential steps to provide a double barrier and facilitate aseptic presentation (Correct answer)
Wrapping instruments in a single layer of plastic

Correct answer: Using two layers of sterilization wrap applied in separate, sequential steps to provide a double barrier and facilitate aseptic presentation

Sequential double wrapping creates two independent microbial barriers. If the outer wrap is accidentally compromised during handling or storage, the inner wrap maintains sterility. It also facilitates aseptic opening in the sterile field.

Question 27: What is superheated steam and why is it problematic for sterilization?

Superheated steam is steam at exactly 100°C
Superheated steam has been heated beyond its saturation temperature and behaves like hot air, lacking the latent heat energy needed for effective microbial kill (Correct answer)
Superheated steam is more effective for sterilization
Superheated steam only occurs at very low pressures

Correct answer: Superheated steam has been heated beyond its saturation temperature and behaves like hot air, lacking the latent heat energy needed for effective microbial kill

Saturated steam releases its latent heat energy when it condenses on surfaces, which is essential for microbial kill. Superheated steam does not condense readily and transfers heat less efficiently, similar to dry hot air.

Question 28: What does 'lot traceability' require in sterile processing?

Linking processed items to specific patients, loads, and cycle parameters so events can be traced if a recall or failure occurs (Correct answer)
Documenting staff scheduling for each shift
Tracking only the cost of sterilization consumables
Recording only the sterilizer model number

Correct answer: Linking processed items to specific patients, loads, and cycle parameters so events can be traced if a recall or failure occurs

Lot traceability requires that processed items can be linked back to specific sterilization runs and patients, enabling effective recalls and investigations.

Question 29: What impact does understaffing in the reprocessing department have on patient safety?

Technology has eliminated the need for adequate staffing
Understaffing has no impact on safety because the processes are automated
Understaffing can lead to rushed work, skipped steps, increased error rates, delayed instrument availability, excessive IUSS use, and ultimately increased risk of healthcare-associated infections (Correct answer)
Understaffing only affects employee morale, not patient outcomes

Correct answer: Understaffing can lead to rushed work, skipped steps, increased error rates, delayed instrument availability, excessive IUSS use, and ultimately increased risk of healthcare-associated infections

When reprocessing departments are understaffed, technicians are under pressure to process more items in less time, which increases the likelihood of errors, shortcuts, and missed quality checks — all of which can compromise patient safety.

Question 30: A loaner instrument set arrives without accompanying IFUs. What is the most appropriate action for the sterile processing technician?

Ask a surgeon how they want it processed
Process it using standard protocols since all instruments are similar
Return the set without processing until IFUs are provided (Correct answer)
Use the IFUs from a similar set in the department

Correct answer: Return the set without processing until IFUs are provided

Without validated IFUs, the technician cannot confirm the correct reprocessing method; the set must not be processed until proper documentation is obtained.

Question 31: Which cleaning method uses high-frequency sound waves to remove soil from instruments?

Autoclave
Ultrasonic cleaner (Correct answer)
Washer-disinfector
Pasteurizer

Correct answer: Ultrasonic cleaner

Ultrasonic cleaners use high-frequency sound waves (typically 35-47 kHz) to create cavitation bubbles in the cleaning solution. These bubbles implode on contact with instrument surfaces, dislodging soil from hard-to-reach areas.

Question 32: What is a surgical site infection (SSI) and how can reprocessing failures contribute to it?

An infection occurring at or near the surgical incision within 30-90 days of a procedure, potentially caused by microorganisms on improperly reprocessed surgical instruments (Correct answer)
An infection that only occurs in emergency surgeries
An infection at the IV insertion site
A skin irritation from surgical tape

Correct answer: An infection occurring at or near the surgical incision within 30-90 days of a procedure, potentially caused by microorganisms on improperly reprocessed surgical instruments

SSIs are infections at the surgical site that can occur when microorganisms are introduced during the procedure. Inadequately reprocessed surgical instruments can be a direct source of these pathogens.

Question 33: In the U.S., which standard provides guidance on the validation and routine control of moist heat (steam) sterilization for healthcare facilities?

OSHA 29 CFR 1910.1030
EPA 40 CFR Part 82
ANSI/AAMI ST79 (Correct answer)
ISO 13485

Correct answer: ANSI/AAMI ST79

ANSI/AAMI ST79 is the comprehensive U.S. guideline for steam sterilization and sterility assurance in healthcare facilities.

Question 34: What is the maximum recommended weight for a wrapped instrument tray to be sterilized?

25 pounds (11.4 kg) as recommended by CSA and AAMI standards to ensure adequate steam penetration (Correct answer)
No weight limit applies
100 pounds (45 kg)
50 pounds (22.7 kg)

Correct answer: 25 pounds (11.4 kg) as recommended by CSA and AAMI standards to ensure adequate steam penetration

Heavy trays can impede steam penetration to the centre of the package, resulting in sterilization failure. The 25-pound limit ensures that steam can reach all instrument surfaces within the standard sterilization cycle parameters.

Question 35: What is root cause analysis (RCA) and when should it be performed in the reprocessing department?

A financial analysis of department costs
A systematic investigation method used after adverse events, near-misses, or process failures to identify the underlying cause and prevent recurrence (Correct answer)
A method for finding the oldest instrument in inventory
An analysis performed only by external consultants

Correct answer: A systematic investigation method used after adverse events, near-misses, or process failures to identify the underlying cause and prevent recurrence

RCA goes beyond identifying what happened to determine why it happened at a systemic level. This enables targeted corrective actions that address root causes rather than just symptoms, preventing similar incidents from recurring.

Question 36: What is the technician's responsibility when receiving new or unfamiliar medical devices for reprocessing?

Return them to the operating room without processing
Only supervisors can process new devices
Process them the same way as similar-looking devices
Obtain and review the manufacturer's IFU before processing, verify compatibility with available equipment and chemicals, and consult with the supervisor if unsure (Correct answer)

Correct answer: Obtain and review the manufacturer's IFU before processing, verify compatibility with available equipment and chemicals, and consult with the supervisor if unsure

New or unfamiliar devices may have unique reprocessing requirements. The technician must obtain the IFU, review it carefully, confirm that the department has the necessary equipment and chemicals, and seek guidance if any uncertainty exists.

Question 37: Which of the following is an ethical responsibility of an individual working in Central Processing Department?

Supporting department objectives
Maintaining patient confidentiality (Correct answer)
Reporting work on time
Communicating effectively

Correct answer: Maintaining patient confidentiality

Maintaining patient confidentiality is an ethical responsibility of an individual working in the Central Processing Department. This means that the individual should ensure that patient information is kept confidential and not disclosed to unauthorized individuals. This responsibility is crucial in maintaining patient privacy and trust, as well as complying with legal and ethical standards in healthcare.

Question 38: After a successful low-temperature sterilization cycle using hydrogen peroxide gas plasma, a technician opens the sterilizer door. What is the immediate next step regarding the processed devices?

They need to be rinsed with sterile water to remove residue.
They must be placed in an aerator for 8-12 hours.
They require a quarantine period in a negative pressure room.
They can be handled safely and are ready for immediate use or storage. (Correct answer)

Correct answer: They can be handled safely and are ready for immediate use or storage.

A significant advantage of hydrogen peroxide gas plasma sterilization is that the byproducts are non-toxic (water vapor and oxygen), eliminating the need for an aeration period. Once the cycle is complete, the items can be safely handled and are ready for use or storage.

Question 39: What is the Spaulding classification of a laryngoscope blade, and what minimum reprocessing level does it require?

Critical — requires sterilization
Semi-critical — requires at minimum high-level disinfection (Correct answer)
It depends on the patient's diagnosis
Non-critical — low-level disinfection only

Correct answer: Semi-critical — requires at minimum high-level disinfection

Laryngoscope blades contact mucous membranes of the oropharynx and are therefore classified as semi-critical devices. They require at minimum high-level disinfection, though many Canadian facilities have moved to using sterilizable or single-use blades.

Question 40: A device labelled as 'single-use' by the manufacturer is being considered for reprocessing. What is the Canadian regulatory position?

Reprocessing of single-use devices is regulated by Health Canada and requires a licensed reprocessor to validate safety and effectiveness (Correct answer)
It is completely banned in Canada
Single-use devices can always be reprocessed if cleaned thoroughly
Individual hospitals can decide without regulatory oversight

Correct answer: Reprocessing of single-use devices is regulated by Health Canada and requires a licensed reprocessor to validate safety and effectiveness

In Canada, reprocessing of single-use devices (SUDs) is permitted only through licensed third-party reprocessors who must demonstrate that the reprocessed device meets the same safety and performance standards as the original. Individual facilities cannot reprocess SUDs independently.

Question 41: When manually cleaning reusable medical devices, what is the primary reason for using a neutral pH detergent?

To prevent corrosion and damage to the instruments (Correct answer)
To activate the chemical indicators
To ensure the instruments are sterile after cleaning
To meet the requirements for thermal disinfection

Correct answer: To prevent corrosion and damage to the instruments

Using a neutral pH detergent is crucial for preventing damage to surgical instruments. Highly acidic or alkaline solutions can cause corrosion, pitting, and staining, which can compromise the integrity and function of the device. The other options are incorrect; detergents do not activate chemical indicators, cleaning does not equal sterilization, and detergent choice is separate from thermal disinfection parameters.

Question 42: If a technician discovers that a chemical indicator from a processed load shows a failure, but the load has already been sent to the sterile storage area, what does the quality system require them to do immediately?

Document the failure in their personal notes for future reference.
Wait until the next shift to see if anyone else notices.
Reprocess the next load using a longer cycle time.
Initiate a recall of the entire sterilization load. (Correct answer)

Correct answer: Initiate a recall of the entire sterilization load.

A failed chemical indicator signifies a potential sterilization failure. The quality system mandates immediate action to prevent patient harm, which includes recalling all items from the suspect load to be reprocessed. This process must be documented thoroughly.

Question 43: What is the relationship between pressure and temperature in steam sterilization?

They are unrelated variables
In saturated steam, pressure and temperature are directly related — increasing pressure raises the boiling point and thus the steam temperature, which is how sterilization temperatures above 100°C are achieved (Correct answer)
Higher pressure always means lower temperature
Pressure is controlled independently of temperature

Correct answer: In saturated steam, pressure and temperature are directly related — increasing pressure raises the boiling point and thus the steam temperature, which is how sterilization temperatures above 100°C are achieved

Steam sterilization operates in a sealed, pressurized chamber. By increasing the pressure above atmospheric, the boiling point of water increases, producing steam at temperatures well above 100°C — the temperatures needed for rapid sterilization.

Question 44: What is the purpose of performing a protein residual test on cleaned instruments?

To test the strength of the metal
To determine the manufacturer of the instrument
To verify that cleaning has adequately removed organic soil from instrument surfaces (Correct answer)
To check if sterilization was achieved

Correct answer: To verify that cleaning has adequately removed organic soil from instrument surfaces

Protein residual tests detect trace amounts of protein remaining on instrument surfaces after cleaning. A positive result indicates inadequate cleaning, which can compromise subsequent sterilization and patient safety.

Question 45: An MDRD has several large pieces of equipment, such as a cart washer and ultrasonic cleaners, that generate significant noise. If noise levels are found to exceed the 85 dBA action level, what is the employer required to implement?

A policy requiring all communication to be done via text message
A hearing conservation program (Correct answer)
Sound-proof booths for all employees
A mandatory rotation of staff every 30 minutes

Correct answer: A hearing conservation program

Occupational health and safety regulations, such as those from OSHA, require employers to implement a hearing conservation program when the time-weighted average noise exposure equals or exceeds 85 decibels (dBA) over an 8-hour shift. This program includes noise monitoring, audiometric testing, hearing protection, training, and record keeping.

Question 46: What are additional precautions, and when are they implemented in the reprocessing department?

Precautions used only during construction in the hospital
They are the same as routine practices
Infection-specific measures (contact, droplet, airborne) added on top of routine practices when a patient is known or suspected to have a transmissible infection (Correct answer)
Extra cleaning steps performed only on Mondays

Correct answer: Infection-specific measures (contact, droplet, airborne) added on top of routine practices when a patient is known or suspected to have a transmissible infection

Additional precautions supplement routine practices when a specific transmissible infection is identified. In reprocessing, this may mean enhanced PPE, dedicated reprocessing equipment, or specific handling protocols for instruments used on patients under additional precautions.

Question 47: A medical device reprocessing technician is manually cleaning a set of stainless steel surgical instruments. Which of the following cleaning agents is most appropriate for breaking down protein-based soils like blood and tissue?

Glutaraldehyde solution
70% isopropyl alcohol
Protease-based enzymatic cleaner (Correct answer)
Saline solution

Correct answer: Protease-based enzymatic cleaner

Protease-based enzymatic cleaners are specifically designed to break down protein-based soils, such as blood and tissue, which are common on surgical instruments. Glutaraldehyde is a high-level disinfectant, alcohol is an antiseptic and disinfectant but not a primary cleaning agent for heavy soil, and saline can damage instruments and does not have cleaning properties.

Question 48: Why is thorough cleaning essential before high-level disinfection?

Cleaning removes the need for disinfection
Cleaning is optional if using a strong disinfectant
Cleaning only affects the appearance of instruments
Organic soil remaining on devices can shield microorganisms from the disinfectant and inactivate the chemical agent (Correct answer)

Correct answer: Organic soil remaining on devices can shield microorganisms from the disinfectant and inactivate the chemical agent

Residual organic matter creates a physical barrier that prevents the disinfectant from contacting and killing microorganisms. Additionally, organic soil can chemically react with and deactivate some disinfectants, reducing their effectiveness.

Question 49: An MDRT is preparing to use a basin of Ortho-phthalaldehyde (OPA) for manual high-level disinfection. The Minimum Effective Concentration (MEC) test strip fails to show a passing result. What is the correct immediate action?

Add a small amount of new OPA concentrate to the basin to increase its strength.
Discard the entire basin of solution and prepare a fresh batch, verifying it with a new MEC test. (Correct answer)
Use the solution for non-critical items only and prepare a new batch later.
Record the failure and proceed with the disinfection, but double the soak time.

Correct answer: Discard the entire basin of solution and prepare a fresh batch, verifying it with a new MEC test.

A failed Minimum Effective Concentration (MEC) test indicates that the disinfectant solution has fallen below the required potency to achieve high-level disinfection. [5] Using the solution would be ineffective and unsafe. The only correct procedure is to discard the failed solution and replace it with a fresh batch that has been verified with a passing MEC test before use.

Question 50: How should a reprocessed flexible endoscope be stored to minimize recontamination?

Immersed in disinfectant solution
Coiled in its carrying case
Hanging vertically in a clean, well-ventilated drying cabinet with caps and valves removed (Correct answer)
Laying flat on a countertop

Correct answer: Hanging vertically in a clean, well-ventilated drying cabinet with caps and valves removed

Vertical hanging in a ventilated cabinet allows residual moisture to drain by gravity and air to circulate through channels. Removing caps and valves facilitates drying and prevents moisture trapping that promotes microbial growth.

Question 51: A tray of complex surgical instruments with lumens and box locks arrives in the decontamination area. After manual cleaning, what is the most effective process for removing fine, unseen debris from hard-to-reach areas?

Washer-disinfector cycle
Ultrasonic cleaning (Correct answer)
High-level disinfection soak
Rinsing with sterile water

Correct answer: Ultrasonic cleaning

Ultrasonic cleaning uses a process called cavitation, where microscopic bubbles implode on instrument surfaces, to effectively dislodge and remove soil from areas that are difficult to access manually, such as crevices, joints, and lumens. A washer-disinfector is effective but may not reach all intricate parts as well as cavitation. High-level disinfection and rinsing are subsequent steps, not the primary method for removing fine debris.

Question 52: According to CSA standards, what is the recommended water temperature range for pre-soaking instruments in enzymatic solution?

Boiling water at 100°C
Lukewarm water between 20°C and 43°C (Correct answer)
Hot water above 60°C
Cold water below 10°C

Correct answer: Lukewarm water between 20°C and 43°C

CSA standards recommend lukewarm water (20°C to 43°C) for enzymatic solutions because temperatures above 43°C can denature the enzymes, reducing their effectiveness, while very cold water slows enzyme activity.

Question 53: What are routine practices (formerly universal precautions) in the context of infection prevention?

Precautions taken only when handling sharps
A set of infection prevention measures applied to ALL patients and situations regardless of known infection status (Correct answer)
Practices limited to operating room staff only
Special precautions used only during outbreaks

Correct answer: A set of infection prevention measures applied to ALL patients and situations regardless of known infection status

Routine practices are applied universally because any patient may carry undiagnosed infections. In reprocessing, this means treating all instruments as potentially contaminated and following full decontamination protocols regardless of the patient's known infection status.

Question 54: Why is it important to keep instrument trays in the open or unlocked position during transport to the decontamination area?

To reduce transport container weight
To allow visual inspection of instrument completeness during transport
To comply with The Joint Commission transport regulations
To allow penetration of cleaning solutions into joints and box locks during decontamination, and to prevent instrument damage from pressure in closed position (Correct answer)

Correct answer: To allow penetration of cleaning solutions into joints and box locks during decontamination, and to prevent instrument damage from pressure in closed position

Instruments transported in the open position allow cleaning solutions to reach all surfaces including joints and hinges during decontamination, ensuring thorough cleaning.

Question 55: A Medical Device Reprocessing Technician (MDRT) is preparing to manually clean a surgical instrument contaminated with blood and tissue. According to Routine Practices (Standard Precautions), what is the minimum Personal Protective Equipment (PPE) the technician must wear?

A pair of gloves only.
Eye protection and a surgical mask.
A fluid-resistant gown and utility gloves.
A fluid-resistant gown, eye protection, a surgical mask, and utility gloves. (Correct answer)

Correct answer: A fluid-resistant gown, eye protection, a surgical mask, and utility gloves.

Routine Practices require the use of appropriate PPE to protect against splashes and aerosol generation, which are significant risks during manual cleaning. This includes a fluid-resistant gown to protect clothing and skin, eye protection (goggles or face shield) to protect mucous membranes of the eyes, a mask to protect the nose and mouth, and heavy-duty utility gloves to prevent sharps injuries and exposure to contaminated fluids.

Question 56: What is an immediate-use steam sterilization (IUSS) cycle and what are its limitations?

A shortened sterilization cycle used for cleaned but unpackaged instruments needed urgently, with significant limitations including no sterile barrier for storage or transport (Correct answer)
A standard sterilization cycle with no limitations
A cycle used only for implants
A cycle that takes longer than standard sterilization

Correct answer: A shortened sterilization cycle used for cleaned but unpackaged instruments needed urgently, with significant limitations including no sterile barrier for storage or transport

IUSS (formerly flash sterilization) uses shorter cycle parameters for unpackaged instruments needed immediately. It should only be used when no sterile alternative is available, never for convenience or routine use.

Question 57: Why must instruments with lumens receive special attention during decontamination?

Soil and biofilm can accumulate inside narrow channels where standard cleaning cannot reach (Correct answer)
Lumens do not need sterilization
Lumens are more expensive to replace
Instruments with lumens are always single-use

Correct answer: Soil and biofilm can accumulate inside narrow channels where standard cleaning cannot reach

Lumened instruments have narrow internal channels where blood, tissue, and biofilm can accumulate and are difficult to reach with standard cleaning methods. They require specific brushing, flushing, and sometimes ultrasonic cleaning to ensure adequate decontamination.

Question 58: How does the CMDRT role align with the broader concept of patient-centred care?

Patient-centred care only involves bedside clinicians
Reprocessing quality has no impact on the patient experience
Reprocessing is completely disconnected from patient-centred care
Although technicians may not interact with patients directly, their commitment to quality ensures every patient receives safe, properly reprocessed devices, which is a fundamental aspect of patient-centred care (Correct answer)

Correct answer: Although technicians may not interact with patients directly, their commitment to quality ensures every patient receives safe, properly reprocessed devices, which is a fundamental aspect of patient-centred care

Patient-centred care means putting the patient's safety and wellbeing at the centre of every decision. For reprocessing technicians, this means approaching every instrument as though their own family member will be the patient.

Question 59: A hospital's MDRD processes many heat-sensitive, complex devices. They are considering a low-temperature sterilization method known for its safety, as its primary byproducts are non-toxic. Which method breaks down into water and oxygen?

Ethylene Oxide (EO)
Formaldehyde
Glutaraldehyde
Vaporized Hydrogen Peroxide (VHP) (Correct answer)

Correct answer: Vaporized Hydrogen Peroxide (VHP)

Vaporized Hydrogen Peroxide (VHP) is considered an environmentally safe sterilization method because the active hydrogen peroxide vapor breaks down into harmless byproducts: water and oxygen. This contrasts with methods like Ethylene Oxide, which leave toxic residues requiring lengthy aeration.

Question 60: What biological indicator is used to monitor ethylene oxide sterilization cycles?

Staphylococcus aureus
Escherichia coli
Geobacillus stearothermophilus
Bacillus atrophaeus (formerly B. subtilis var. niger) (Correct answer)

Correct answer: Bacillus atrophaeus (formerly B. subtilis var. niger)

Bacillus atrophaeus spores are used as the biological indicator for ETO sterilization because they are highly resistant to ETO gas. If the sterilization process kills these resistant spores, it confirms that less resistant organisms were also eliminated.

Question 61: What is the concept of sterility assurance level (SAL) and what SAL is required for medical devices?

Any SAL above 50% is acceptable
SAL is only relevant for pharmaceutical products
SAL of 10^-6 is required, meaning the probability of a viable microorganism surviving the sterilization process is no more than one in one million (Correct answer)
SAL measures the weight of a sterile package

Correct answer: SAL of 10^-6 is required, meaning the probability of a viable microorganism surviving the sterilization process is no more than one in one million

A SAL of 10^-6 is the internationally accepted standard for medical device sterilization, meaning that after a properly validated sterilization cycle, the probability of any given device being non-sterile is less than one in a million.

Question 62: What documentation responsibilities does a reprocessing technician have?

Documentation is only needed for accreditation surveys
Technicians must accurately document all processes including sterilization parameters, quality test results, equipment maintenance, non-conformances, and traceability records (Correct answer)
Documentation is unnecessary if the work is done correctly
Only supervisors are responsible for documentation

Correct answer: Technicians must accurately document all processes including sterilization parameters, quality test results, equipment maintenance, non-conformances, and traceability records

Complete and accurate documentation is essential for traceability, quality assurance, regulatory compliance, and patient safety. The principle of 'if it wasn't documented, it wasn't done' applies throughout reprocessing.

Question 63: What is the Bowie-Dick test and why is it performed daily?

A biological indicator test
A test of the sterilizer's door seal
A test performed only during annual maintenance
A specific test for prevacuum sterilizers that verifies adequate air removal from the chamber, performed daily before the first patient load (Correct answer)

Correct answer: A specific test for prevacuum sterilizers that verifies adequate air removal from the chamber, performed daily before the first patient load

The Bowie-Dick test uses a standardized test pack to detect air leaks and inadequate air removal in prevacuum sterilizers. Trapped air prevents steam contact with instrument surfaces and can result in sterilization failure.

Question 64: What is an automated endoscope reprocessor (AER) and what advantage does it offer?

A storage cabinet for endoscopes
A manual cleaning basin with built-in lighting
A device that sterilizes endoscopes using steam
An automated machine that performs cleaning, high-level disinfection, rinsing, and alcohol flush in a controlled, reproducible cycle (Correct answer)

Correct answer: An automated machine that performs cleaning, high-level disinfection, rinsing, and alcohol flush in a controlled, reproducible cycle

An AER automates the reprocessing cycle, providing consistent chemical concentrations, temperatures, contact times, and channel perfusion. This reduces human variability and ensures each reprocessing cycle meets defined parameters.

Question 65: What is the first-in, first-out (FIFO) principle and how does it apply to sterile storage?

FIFO only applies to food service
Items sterilized first should be distributed first to ensure stock rotation and prevent items from exceeding shelf life (Correct answer)
Items should be distributed randomly
The newest items should always be used first

Correct answer: Items sterilized first should be distributed first to ensure stock rotation and prevent items from exceeding shelf life

FIFO ensures that older sterilized items are used before newer ones, preventing stock from sitting on shelves beyond its shelf life and reducing waste from expired sterile packages.

Question 66: An MDRT is loading a complex flexible duodenoscope into an Automated Endoscope Reprocessor (AER). The technician correctly connects the hookups for the main channels but overlooks the specific, smaller connector for the elevator wire channel. What is the most likely consequence of this oversight?

The AER will alarm and stop the cycle because it detects a missed connection.
The elevator wire channel will not be adequately high-level disinfected. (Correct answer)
The cycle time for the AER will be significantly shorter due to lower fluid volume.
The exterior of the endoscope's distal tip will not be properly cleaned.

Correct answer: The elevator wire channel will not be adequately high-level disinfected.

AERs rely on the user to attach specific channel connectors to ensure that cleaning solutions and high-level disinfectants are flushed through every internal lumen. Failure to connect a dedicated lumen, such as the elevator wire channel, will result in that channel not being exposed to the disinfectant, leading to a reprocessing failure and posing a significant risk to patient safety.

Question 67: Which of the following correctly describes the role of the sterile processing department manager in a loaner instrument program?

The SPD manager only intervenes when a loaner-related incident occurs
The SPD manager's role is limited to approving invoices for loaner rentals
The SPD manager has no formal role; vendors manage their own instruments
The SPD manager should establish written policies, staff education, and vendor communication protocols for loaner instruments (Correct answer)

Correct answer: The SPD manager should establish written policies, staff education, and vendor communication protocols for loaner instruments

The SPD manager is responsible for creating and enforcing written policies for receiving, processing, and tracking loaner instrumentation, as well as ensuring staff are trained on vendor-specific IFU requirements.

Question 68: Who bears primary responsibility for ensuring contaminated instruments receive point-of-use treatment before transport to the SPD?

The infection control officer
The facility administrator
The perioperative team (OR staff) at the point where instruments are used (Correct answer)
The sterile processing technician who receives the instruments

Correct answer: The perioperative team (OR staff) at the point where instruments are used

The perioperative team that uses the instruments is responsible for point-of-use treatment, as they are present when contamination occurs and before instruments leave the procedure area.

Question 69: What is a par level system in sterile supply management?

A system that eliminates all sterile inventory
A method of organizing instruments alphabetically
A quality rating system for sterilization
A system that establishes minimum and maximum quantities for each sterile item, triggering reprocessing or reordering when stock falls to the minimum level (Correct answer)

Correct answer: A system that establishes minimum and maximum quantities for each sterile item, triggering reprocessing or reordering when stock falls to the minimum level

Par levels ensure adequate sterile supply availability without excessive overstocking. The minimum level triggers replenishment, while the maximum prevents waste from over-sterilization and excessive inventory.

Question 70: What is the correct initial action when loaner instrumentation is received by the sterile processing department?

Both inspect, document condition, and decontaminate before processing (Correct answer)
Immediately sterilize the instruments
Inspect for damage only
Decontaminate before any further processing

Correct answer: Both inspect, document condition, and decontaminate before processing

Upon receipt, loaner instruments must be inspected and their condition documented, then fully decontaminated before any further handling or processing regardless of their apparent cleanliness.

Question 71: During the manual cleaning of an endoscope, a technician uses a steel wire brush to clean the internal channel. Why is this action incorrect and what should be used instead?

It is incorrect; only enzymatic foam should be used, with no brushing required.
It is incorrect; a metal brush can damage the channel lining, and a soft, plastic bristle brush should be used. (Correct answer)
It is incorrect; channels should only be flushed and not brushed.
It is correct; steel brushes are needed for tough bioburden.

Correct answer: It is incorrect; a metal brush can damage the channel lining, and a soft, plastic bristle brush should be used.

Using abrasive materials like steel wool or wire brushes can scratch and damage the surfaces of medical devices, especially the delicate internal channels of endoscopes. These scratches can harbor microorganisms and make future cleaning more difficult. The correct procedure is to use brushes with soft, non-abrasive bristles, typically plastic, that are of the appropriate size for the lumen or channel being cleaned.

Question 72: According to Canadian Standards Association (CSA) Z314-18, the physical layout of a Medical Device Reprocessing Department (MDRD) is designed to facilitate one-way workflow. What is the primary infection prevention purpose of this design?

To ensure technicians do not have to walk as far.
To make it easier for supervisors to monitor staff.
To improve the department's aesthetics and organization.
To prevent cross-contamination between soiled and clean/sterile items. (Correct answer)

Correct answer: To prevent cross-contamination between soiled and clean/sterile items.

A one-way workflow from the decontamination (soiled) area to the preparation/packaging (clean) area and then to the sterilization/storage (sterile) area is a fundamental principle of MDRD design. This directional flow is crucial to prevent clean and sterile items from coming into contact with or being contaminated by soiled items, thus breaking the chain of infection.

Question 73: A Medical Device Reprocessing Department is preparing for an external audit by an accreditation body. The auditor will most likely want to review which of the following records to verify the effectiveness of the sterilization process?

Purchase orders for new surgical instruments
Staff vacation schedules
Equipment maintenance logs and sterilization cycle printouts (Correct answer)
Minutes from the last departmental staff meeting

Correct answer: Equipment maintenance logs and sterilization cycle printouts

Auditors verify compliance and effectiveness by reviewing objective evidence. For sterilization, this includes equipment maintenance records to ensure machines are functioning correctly and the physical, chemical, and biological monitoring records from each sterilization cycle.

Question 74: What is the difference between decontamination and disinfection in infection prevention terminology?

Decontamination only refers to removing visible dirt
Disinfection always comes before decontamination
Decontamination is the broad process of making items safe to handle by reducing microbial contamination, while disinfection is a specific step that destroys most pathogenic microorganisms using chemical or physical methods (Correct answer)
They are exactly the same process

Correct answer: Decontamination is the broad process of making items safe to handle by reducing microbial contamination, while disinfection is a specific step that destroys most pathogenic microorganisms using chemical or physical methods

Decontamination is the overarching process that includes all steps to reduce contamination to a safe level (cleaning, disinfecting, sterilizing). Disinfection is one specific step within this process that targets microbial reduction through defined chemical or thermal methods.

Question 75: An MDRT is working in the decontamination area and their gloved hand is accidentally punctured by a sharp instrument. What is the most appropriate immediate action to take?

Immediately remove the gloves, wash the area with soap and water, and report the injury. (Correct answer)
Squeeze the wound to encourage bleeding and then cover it with a bandage.
Finish cleaning the current set of instruments before seeking help.
Apply a new pair of gloves over the punctured one and continue working.

Correct answer: Immediately remove the gloves, wash the area with soap and water, and report the injury.

In case of a sharps injury, the immediate priority is to decontaminate the wound by washing it thoroughly with soap and water. The incident must then be reported immediately to a supervisor according to the facility's occupational health and safety policy for post-exposure follow-up. Continuing to work or simply covering the wound is unsafe.

Question 76: What is the correct procedure for sealing peel pouches for sterilization?

Seal using the heat sealer at the validated temperature with an adequate seal width, ensuring no channels or wrinkles in the seal (Correct answer)
Fold the open end and secure with regular tape
Use paper clips to close the pouch
Staple the open end closed

Correct answer: Seal using the heat sealer at the validated temperature with an adequate seal width, ensuring no channels or wrinkles in the seal

Heat sealing creates a continuous, airtight seal that maintains the sterile barrier. Staples, clips, and non-sterilization tape create holes or inadequate seals that allow microbial ingress. The seal must be wrinkle-free to prevent channels.

Question 77: A flexible endoscope cannot be sterilized using steam due to its heat-sensitive nature. Which of the following low-temperature sterilization methods is incompatible with devices containing cellulose-based materials like paper or linen?

Hydrogen Peroxide Gas Plasma (Correct answer)
Peracetic Acid Immersion
Ethylene Oxide (EO)
Ozone (O3)

Correct answer: Hydrogen Peroxide Gas Plasma

Hydrogen peroxide gas plasma sterilization is not suitable for items containing cellulose, such as paper and linen, because these materials absorb the hydrogen peroxide, which can lead to cycle cancellation or incomplete sterilization.

Question 78: What is the proper response when a reprocessing breach (failure in the sterilization or disinfection process) is identified?

Wait until the next scheduled audit to report it
Immediately quarantine affected items, notify IPAC and management, initiate a patient notification and recall if necessary, investigate root cause, and implement corrective actions (Correct answer)
Only document it for future reference
Ignore it if no infections have been reported

Correct answer: Immediately quarantine affected items, notify IPAC and management, initiate a patient notification and recall if necessary, investigate root cause, and implement corrective actions

A reprocessing breach requires immediate action: quarantine affected devices, notify the IPAC team and management, assess patient risk, potentially notify affected patients, investigate the root cause, and implement corrective measures to prevent recurrence.

Question 79: What is the difference between a Type 5 (integrating) and Type 6 (emulating) chemical indicator?

There is no difference
A Type 5 integrates all critical parameters and is designed to correlate with BI performance, while a Type 6 is designed to react to all critical parameters of a specific sterilization cycle type (Correct answer)
Type 6 is less accurate than Type 5
Type 5 is placed outside packages and Type 6 inside

Correct answer: A Type 5 integrates all critical parameters and is designed to correlate with BI performance, while a Type 6 is designed to react to all critical parameters of a specific sterilization cycle type

Type 5 integrating indicators respond to all critical sterilization parameters with stated values that correlate with BI kill, making them versatile across cycle types. Type 6 emulating indicators are cycle-specific, designed to respond to the exact parameters of one particular cycle.

Question 80: Which types of materials are NOT compatible with hydrogen peroxide gas plasma sterilization?

Titanium instruments
Cellulose-based materials (paper, cotton, linen), liquids, and devices with long narrow lumens below specified dimensions (Correct answer)
Stainless steel instruments
Silicone tubing within specifications

Correct answer: Cellulose-based materials (paper, cotton, linen), liquids, and devices with long narrow lumens below specified dimensions

Cellulose-based materials absorb hydrogen peroxide and prevent plasma formation. Liquids are not compatible because the process requires a deep vacuum. Long narrow lumens may not allow adequate peroxide penetration to achieve sterilization.

Question 81: What is antimicrobial resistance (AMR) and how does it impact medical device reprocessing?

AMR only affects medication choices, not reprocessing
AMR makes instruments more durable
AMR refers to microorganisms that have evolved to survive antimicrobial treatments, making thorough reprocessing even more critical to prevent transmission of these resistant organisms (Correct answer)
AMR means instruments are resistant to cleaning

Correct answer: AMR refers to microorganisms that have evolved to survive antimicrobial treatments, making thorough reprocessing even more critical to prevent transmission of these resistant organisms

Antimicrobial-resistant organisms (such as MRSA, VRE, and CRE) are harder to treat with standard antibiotics, making prevention of transmission through properly reprocessed devices even more important for patient safety.

Question 82: What is hydrogen peroxide gas plasma sterilization?

A type of ultraviolet light sterilization
Sterilization using liquid hydrogen peroxide
A steam sterilization process with added hydrogen peroxide
A low-temperature sterilization method that uses hydrogen peroxide vapour converted to a plasma state by radiofrequency energy to sterilize medical devices (Correct answer)

Correct answer: A low-temperature sterilization method that uses hydrogen peroxide vapour converted to a plasma state by radiofrequency energy to sterilize medical devices

Hydrogen peroxide gas plasma (such as STERRAD systems) uses a combination of hydrogen peroxide vapour and low-temperature plasma (ionized gas) to achieve sterilization at temperatures around 45-55°C, suitable for many heat-sensitive devices.

Question 83: What is the critical difference between high-level disinfection and sterilization?

High-level disinfection eliminates most microorganisms but may not kill all bacterial spores, while sterilization destroys all forms of microbial life including spores (Correct answer)
High-level disinfection is only used for non-critical devices
Sterilization is faster than high-level disinfection
There is no meaningful difference

Correct answer: High-level disinfection eliminates most microorganisms but may not kill all bacterial spores, while sterilization destroys all forms of microbial life including spores

Sterilization achieves complete destruction of all microorganisms including highly resistant bacterial endospores. High-level disinfection eliminates vegetative bacteria, viruses, fungi, and mycobacteria but may not eliminate all spores, making it suitable for semi-critical but not critical devices.

Question 84: How should sterile supply rotation be managed during emergency situations such as a mass casualty event?

Emergency protocols should be activated that prioritize critical items, authorize expedited processing, increase IUSS availability, and coordinate with clinical areas on supply priorities (Correct answer)
Normal procedures should be maintained without any modifications
The reprocessing department should shut down during emergencies
All sterile supplies should be distributed immediately without inspection

Correct answer: Emergency protocols should be activated that prioritize critical items, authorize expedited processing, increase IUSS availability, and coordinate with clinical areas on supply priorities

Mass casualty events create sudden surges in demand for sterile instruments and supplies. Pre-planned emergency protocols ensure critical items are available while maintaining patient safety standards to the greatest extent possible.

Question 85: Which Spaulding classification applies to items that contact only intact skin and require low-level disinfection at minimum?

Noncritical (Correct answer)
Semi-critical
Sterile
Critical

Correct answer: Noncritical

Noncritical items contact intact skin and require low-level disinfection to remove most pathogens but are not required to be sterile.

Question 86: What are the occupational health risks associated with glutaraldehyde exposure during high-level disinfection?

Temporary colour changes to the skin
Respiratory sensitization, skin dermatitis, eye irritation, and asthma-like symptoms (Correct answer)
Only mild skin dryness
There are no health risks with glutaraldehyde

Correct answer: Respiratory sensitization, skin dermatitis, eye irritation, and asthma-like symptoms

Glutaraldehyde is a known respiratory sensitizer and skin sensitizer. Repeated or acute exposure can cause occupational asthma, allergic contact dermatitis, eye irritation, headaches, and nose/throat irritation. Proper PPE and ventilation are essential.

Question 87: What is ethylene oxide (ETO) sterilization and when is it used in medical device reprocessing?

A type of steam sterilization at low pressure
A manual cleaning method using ETO liquid
A chemical sterilization method using ETO gas for heat-sensitive and moisture-sensitive devices that cannot withstand steam sterilization (Correct answer)
A radiation-based sterilization technique

Correct answer: A chemical sterilization method using ETO gas for heat-sensitive and moisture-sensitive devices that cannot withstand steam sterilization

ETO sterilization uses ethylene oxide gas to sterilize medical devices that would be damaged by the high temperatures and moisture of steam sterilization, such as flexible endoscopes, certain plastics, electronics, and battery-powered devices.

Question 88: What temperature and contact time parameters are critical for effective high-level disinfection?

Boiling temperature for 30 seconds
The specific temperature and minimum contact time specified in the disinfectant manufacturer's instructions for use (Correct answer)
Room temperature for 5 minutes regardless of the product
Any temperature for any duration

Correct answer: The specific temperature and minimum contact time specified in the disinfectant manufacturer's instructions for use

Each high-level disinfectant has validated parameters — specific minimum temperature and contact time — that must be met to achieve the claimed level of microbial kill. These parameters are determined by the manufacturer through standardized testing.

Question 89: What is the role of a washer-disinfector in the decontamination process?

It is used exclusively for sharpening instruments
It only stores instruments
It replaces the need for sterilization entirely
It provides automated cleaning and thermal disinfection in a single cycle (Correct answer)

Correct answer: It provides automated cleaning and thermal disinfection in a single cycle

A washer-disinfector automates the cleaning process and includes a thermal disinfection phase, typically using heated rinse water at a specified temperature and exposure time. This standardizes cleaning and reduces staff exposure to contaminated items.

Question 90: Which organizations provide the primary guidelines addressing loaner instrumentation management in healthcare sterile processing?

CDC and WHO only
FDA only
OSHA and EPA only
IAHCSMM and AORN (Correct answer)

Correct answer: IAHCSMM and AORN

IAHCSMM (International Association of Healthcare Central Service Materiel Management) and AORN (Association of periOperative Registered Nurses) both publish comprehensive guidelines for loaner instrumentation management.

Question 91: What action should be taken if an instrument arrives at the decontamination area with dried-on soil?

Discard the instrument immediately
Proceed directly to sterilization
Scrub with an abrasive pad without soaking
Soak in enzymatic solution to soften the dried soil before cleaning (Correct answer)

Correct answer: Soak in enzymatic solution to soften the dried soil before cleaning

Dried-on soil is harder to remove and can harbor microorganisms. Soaking in enzymatic solution rehydrates and loosens the dried organic matter, making it accessible for effective cleaning without damaging the instrument surface.

Question 92: What is the role of the Joint Health and Safety Committee (JHSC) in a reprocessing department?

The JHSC includes worker and management representatives who identify hazards, review incidents, recommend improvements, and promote workplace safety (Correct answer)
The JHSC has no role in reprocessing
The JHSC only deals with pay disputes
The JHSC is only for office workers

Correct answer: The JHSC includes worker and management representatives who identify hazards, review incidents, recommend improvements, and promote workplace safety

JHSCs are required by Canadian OHS legislation in most workplaces. They provide a formal mechanism for workers and management to collaborate on identifying and resolving health and safety issues.

Question 93: What is the minimum recommended contact time for most enzymatic detergents to be effective?

30 minutes
2 hours
5 seconds
The manufacturer's recommended contact time, typically 1 to 10 minutes (Correct answer)

Correct answer: The manufacturer's recommended contact time, typically 1 to 10 minutes

Enzymatic detergents require adequate contact time to break down organic soil. The specific time varies by product, but manufacturers typically recommend 1 to 10 minutes, and their instructions for use (IFU) must always be followed.

Question 94: A patient contracts an infection from an improperly sterilized surgical instrument. This is an example of

A nosocomial infection (Correct answer)
An aerobic infection
An airborne transmission
A vector transmission

Correct answer: A nosocomial infection

A nosocomial infection refers to an infection that is acquired in a hospital or healthcare setting. In this case, the patient contracted an infection from a surgical instrument that was not properly sterilized. This indicates that the infection was acquired during the patient's stay in the hospital, making it a nosocomial infection.

Question 95: What is the significance of the Spaulding classification system in endoscope reprocessing?

It categorizes medical devices as critical, semi-critical, or non-critical based on infection risk to determine the required level of reprocessing (Correct answer)
It classifies instruments by manufacturer
It classifies staff by their training level
It ranks endoscopes by price

Correct answer: It categorizes medical devices as critical, semi-critical, or non-critical based on infection risk to determine the required level of reprocessing

The Spaulding classification determines the minimum reprocessing level needed: critical items (enter sterile tissue) require sterilization, semi-critical items (contact mucous membranes) require HLD, and non-critical items (contact intact skin) require low-level disinfection.

Question 96: What professional development responsibilities does a CMDRT have?

Professional development ends after passing the certification exam
CMDRTs are responsible for maintaining certification through continuing education, staying current with standards and best practices, and actively seeking learning opportunities (Correct answer)
Only attending conferences counts as professional development
Professional development is the employer's sole responsibility

Correct answer: CMDRTs are responsible for maintaining certification through continuing education, staying current with standards and best practices, and actively seeking learning opportunities

Professional development is an ongoing personal and professional responsibility. Certified technicians must maintain their certification through continuing education and actively stay current with evolving practices and technologies.

Question 97: Which organization publishes standards such as ANSI/AAMI ST79 that guide sterile processing practices in the U.S.?

Centers for Disease Control and Prevention (CDC)
The Joint Commission (TJC)
Association for the Advancement of Medical Instrumentation (AAMI) (Correct answer)
World Health Organization (WHO)

Correct answer: Association for the Advancement of Medical Instrumentation (AAMI)

AAMI publishes ANSI/AAMI ST79, the comprehensive guide to steam sterilization and sterility assurance in healthcare facilities.

Question 98: A flexible endoscope, which is used to visualize the gastrointestinal tract, comes into contact with mucous membranes. According to the Spaulding Classification system, how should this device be categorized and reprocessed?

Semi-critical; requires, at a minimum, high-level disinfection. (Correct answer)
Non-critical; requires low-level disinfection.
Critical; requires sterilization.
Non-critical; requires cleaning with detergent and water.

Correct answer: Semi-critical; requires, at a minimum, high-level disinfection.

The Spaulding Classification system categorizes medical devices based on the risk of infection involved with their use. Devices that contact mucous membranes or non-intact skin, like flexible endoscopes, are considered semi-critical. The minimum required reprocessing for semi-critical devices is high-level disinfection (HLD), although sterilization is preferred when possible.

Question 99: What ventilation requirements exist for areas where high-level disinfectants are used?

Adequate ventilation including local exhaust ventilation to keep chemical vapour exposure below occupational exposure limits (Correct answer)
No special ventilation is needed
Only a window needs to be open
Standard office HVAC is sufficient

Correct answer: Adequate ventilation including local exhaust ventilation to keep chemical vapour exposure below occupational exposure limits

High-level disinfectants like glutaraldehyde and OPA produce vapours that can cause respiratory sensitization and irritation. Engineering controls including local exhaust ventilation are required to maintain air concentrations below Canadian OELs.

Question 100: What are the three critical parameters that must be achieved for effective steam sterilization?

Pressure, colour, and smell
Time, temperature, and steam quality (saturated steam with direct contact) (Correct answer)
Speed, pressure, and dryness
Weight, volume, and density

Correct answer: Time, temperature, and steam quality (saturated steam with direct contact)

Steam sterilization requires saturated steam at the correct temperature (121°C or 132°C) maintained for the required exposure time with direct steam contact on all surfaces. All three parameters must be met simultaneously.

Certified Medical Device Reprocessing Technician (CMDRT)

The CMDRT exam, administered by CSA Group, certifies technicians in the safe and effective reprocessing of reusable medical devices in healthcare facilities.

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