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

Question 1: In the chain of infection, what role does a contaminated surgical instrument play?

Susceptible host.
Portal of exit.
Mode of transmission. (Correct answer)
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 2: What is superheated steam and why is it problematic for sterilization?

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 is steam at exactly 100°C
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 3: While working in the decontamination area, a technician must add a concentrated enzymatic detergent to the sink. They notice the WHMIS 2015 pictogram shown (a person with a starburst on the chest) on the container. What type of hazard does this symbol primarily represent?

Biohazardous infectious material
A long-term or serious health hazard, such as carcinogenicity (Correct answer)
Corrosion hazard, causing skin burns or eye damage
Acute toxicity (fatal or toxic)

Correct answer: A long-term or serious health hazard, such as carcinogenicity

The WHMIS 2015 'Health Hazard' pictogram (person with a starburst) is used to indicate substances that may cause or are suspected of causing serious long-term health effects. These include carcinogenicity (cancer-causing), mutagenicity (causing genetic defects), reproductive toxicity, respiratory sensitization, target organ toxicity, and aspiration toxicity.

Question 4: Material Safety Data Sheets provide health and safety hazard and risk information on which of the following?

Chemical (Correct answer)
Electrical
Mechanical
Biological

Correct answer: Chemical

Material Safety Data Sheets (MSDS) provide health and safety hazard and risk information specifically for chemicals. These sheets contain detailed information about properties , handling, storage ang emergency procedures for chemicals. They provide essential information on potential health hazards, such as toxicity, flammability and reactivity as well as guidance on proper protective measures and first aid procedures . MSDSs are crucial for ensuring the safe handling, use and storage of chemicals in various settings, including workplaces, laboratories and households.

Question 5: An MDRT is preparing to transport several sterile instrument trays from the MDRD to an operating room on another floor. Which of the following is the most appropriate method for transporting these items?

Placing the trays in a clean, dedicated, covered cart. (Correct answer)
Using the same cart that transports soiled items after wiping it with a disinfectant.
Stacking the trays carefully on an open utility cart.
Carrying the trays by hand, ensuring they remain level.

Correct answer: Placing the trays in a clean, dedicated, covered cart.

Sterile items must be transported in a manner that protects them from environmental contamination and physical damage. A clean, dedicated, and covered cart is the standard method to maintain the integrity of the sterile barrier during transit between departments.

Question 6: What would you describe this?

Spore
Spherical
Spirochete (Correct answer)
Protozoa

Correct answer: Spirochete

A spirochete is a type of bacteria that has a spiral or corkscrew shape. It is known for its flexile body and its ability to move in corkscrew-like motion. Spirochetes are found in various environments, including water and soil, as well as in the bodies of humans and animals. They can cause disease such as in the bodies of humans and animals. They can cause disease such as syphilis and Lyme disease.

Question 7: What is the concept of sterility assurance level (SAL) and what SAL is required for medical devices?

SAL is only relevant for pharmaceutical products
SAL measures the weight of a sterile package
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)
Any SAL above 50% is acceptable

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 8: What is the difference between a process indicator and an outcome indicator in reprocessing quality management?

Outcome indicators are not measurable in reprocessing
Process indicators measure whether steps are being performed correctly (e.g., cleaning verification compliance), while outcome indicators measure results (e.g., sterilization failure rate, device-related infection rate) (Correct answer)
Process indicators are only used in manufacturing
They are the same thing

Correct answer: Process indicators measure whether steps are being performed correctly (e.g., cleaning verification compliance), while outcome indicators measure results (e.g., sterilization failure rate, device-related infection rate)

Process indicators monitor whether the reprocessing steps are being executed according to standards, while outcome indicators measure the end results. Both types are needed for a comprehensive quality monitoring program.

Question 9: 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
Rinsing with sterile water
Ultrasonic cleaning (Correct answer)
High-level disinfection soak

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

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

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 11: What is the difference between a gravity displacement sterilizer and a prevacuum sterilizer?

They are identical machines with different names
Gravity sterilizers are faster than prevacuum sterilizers
Prevacuum sterilizers do not use steam
A gravity displacement sterilizer relies on steam displacing air downward by gravity, while a prevacuum sterilizer uses a vacuum pump to actively remove air before steam admission (Correct answer)

Correct answer: A gravity displacement sterilizer relies on steam displacing air downward by gravity, while a prevacuum sterilizer uses a vacuum pump to actively remove air before steam admission

In gravity displacement, steam enters the top of the chamber and pushes air out through a drain at the bottom. Prevacuum sterilizers actively pull air out using a vacuum pump before introducing steam, resulting in faster and more complete steam penetration.

Question 12: Why is thorough cleaning essential before high-level disinfection?

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

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 13: A technician performing a leak test on a flexible gastroscope observes that the pressure gauge fails to hold a steady pressure and drops continuously. Which of the following is the most appropriate immediate action?

Submerge the pressurized scope in water to visually confirm the leak's location.
Proceed with manual cleaning but flag the scope for repair later.
Discontinue the reprocessing procedure, document the failure, and send the endoscope for repair. (Correct answer)
Re-pressurize the scope to a higher PSI to locate the leak.

Correct answer: Discontinue the reprocessing procedure, document the failure, and send the endoscope for repair.

A failed leak test indicates a breach in the scope's integrity. Continuing the reprocessing procedure would allow fluids to enter the internal components, causing catastrophic damage. The scope must be immediately removed from service, the issue documented, and the device sent for repair to prevent fluid invasion.

Question 14: What precautions should be taken when packaging sharp instruments for sterilization?

Sharps should always be sterilized loose without packaging
No special precautions are needed
Sharp tips and cutting edges should be protected with tip protectors or guards to prevent puncture of the packaging and injury during handling (Correct answer)
Sharps should be wrapped separately in aluminum foil

Correct answer: Sharp tips and cutting edges should be protected with tip protectors or guards to prevent puncture of the packaging and injury during handling

Unprotected sharp instruments can puncture sterilization wrap or peel pouches, compromising the sterile barrier. Tip protectors also prevent injury to staff handling the packages and protect the instrument's cutting edge.

Question 15: What type of water should be used for the final rinse of instruments after cleaning?

Tap water
Distilled or treated water meeting CSA specifications (Correct answer)
Saline solution
Soapy 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 16: 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 correct; steel brushes are needed for tough bioburden.
It is incorrect; channels should only be flushed and not brushed.
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; only enzymatic foam should be used, with no brushing required.

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 17: 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 18: What is the significance of traffic patterns and zoning in the reprocessing department?

Proper traffic flow from contaminated (dirty) to clean to sterile zones prevents cross-contamination and is a fundamental design principle of reprocessing departments (Correct answer)
Staff should move freely between all zones without restriction
All areas should be open plan for efficiency
Traffic patterns are irrelevant in reprocessing

Correct answer: Proper traffic flow from contaminated (dirty) to clean to sterile zones prevents cross-contamination and is a fundamental design principle of reprocessing departments

Unidirectional workflow from contaminated to clean to sterile areas prevents processed items from being recontaminated by contact with soiled items or contaminated environments. Physical separation between zones is a core CSA requirement.

Question 19: Which of the following is a critical step when using a heat sealer to close a sterilization peel pouch?

Folding the end of the pouch over several times before inserting it into the heat sealer.
Verifying the sealer provides a complete, uniform seal without any gaps, wrinkles, or bubbles. (Correct answer)
Ensuring the pouch is filled to 100% capacity to avoid empty space.
Writing the date and load information on the paper side of the pouch before sealing.

Correct answer: Verifying the sealer provides a complete, uniform seal without any gaps, wrinkles, or bubbles.

The integrity of the seal is paramount for maintaining the sterility of the contents. The seal must be complete and free of defects like gaps, folds, or wrinkles, which could create channels for microbial contamination. Pouches should only be filled to about 75% capacity, writing should be on the plastic side or designated area, and folding is improper for heat sealing.

Question 20: What is the significance of the Spaulding classification system in endoscope reprocessing?

It classifies instruments by manufacturer
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 ranks endoscopes by price
It classifies staff by their training level

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

Lukewarm water between 20°C and 43°C (Correct answer)
Cold water below 10°C
Boiling water at 100°C
Hot water above 60°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 22: 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)
Standard HLD is sufficient for prion decontamination
Prions are easily destroyed by routine sterilization

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 23: 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)
Vaporized Hydrogen Peroxide (VHP) (Correct answer)
Glutaraldehyde
Formaldehyde

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 24: A technician is packaging a single, lightweight hemostat for steam sterilization. Which of the following is the most appropriate packaging method?

A sequential, non-woven sterilization wrap.
A Tyvek pouch.
A paper-plastic peel pouch. (Correct answer)
A rigid sterilization container.

Correct answer: A paper-plastic peel pouch.

Paper-plastic peel pouches are specifically designed and recommended for packaging small, lightweight, low-profile items like a single hemostat for steam sterilization. Rigid containers are for large sets, wraps are for trays, and Tyvek pouches are typically used for low-temperature sterilization methods, as the material can melt at steam sterilization temperatures.

Question 25: What role does accreditation play in medical device reprocessing quality?

Accreditation by organizations like Accreditation Canada evaluates the reprocessing department against national standards and drives continuous quality improvement (Correct answer)
Accreditation is voluntary and has no impact on quality
Accreditation is a one-time event with no follow-up
Accreditation only evaluates financial performance

Correct answer: Accreditation by organizations like Accreditation Canada evaluates the reprocessing department against national standards and drives continuous quality improvement

Accreditation provides external validation that the reprocessing department meets national quality and safety standards. The accreditation process itself drives improvement by requiring self-assessment, standards compliance, and action planning.

Question 26: 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 radiation-based sterilization technique
A chemical sterilization method using ETO gas for heat-sensitive and moisture-sensitive devices that cannot withstand steam sterilization (Correct answer)

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

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

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

Precautions used only during construction in the hospital
Extra cleaning steps performed only on Mondays
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)

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 29: Which of the following is the most critical first step in the decontamination process for reusable medical devices?

Immediate sterilization after use.
Wrapping the device for transport to the clean assembly area.
Application of a high-level disinfectant.
Thorough manual or mechanical cleaning. (Correct answer)

Correct answer: Thorough manual or mechanical cleaning.

Cleaning is the essential first step in reprocessing. It removes organic soil, such as blood and tissue, which can shield microorganisms from disinfection or sterilization processes. If an instrument is not properly cleaned, subsequent disinfection or sterilization steps may be ineffective.

Question 30: What is a biological indicator (BI) and how is it used in steam sterilization monitoring?

A colour-changing tape on the outside of packages
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)

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 31: Which type of biological indicator (BI) is used to monitor the efficacy of both Vaporized Hydrogen Peroxide (VHP) and Hydrogen Peroxide Gas Plasma sterilization cycles?

Geobacillus stearothermophilus spores (Correct answer)
Bacillus atrophaeus spores
Clostridium sporogenes spores
Bacillus subtilis spores

Correct answer: Geobacillus stearothermophilus spores

Geobacillus stearothermophilus spores are highly resistant to both steam and vaporized hydrogen peroxide sterilization processes, making them the standard microorganism used in biological indicators for these methods.

Question 32: 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 fluid-resistant gown, eye protection, a surgical mask, and utility gloves. (Correct answer)
A fluid-resistant gown and utility gloves.
A pair of gloves only.
Eye protection and a surgical mask.

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 33: What is the role of the CMDRT in managing loaner instruments from external vendors?

Only the vendor is responsible for loaner instrument preparation
Loaner instruments must be received early enough for inspection, cleaning, assembly, sterilization, and biological indicator incubation before the scheduled procedure (Correct answer)
Loaner instruments do not need reprocessing
Loaner instruments can go directly to the operating room

Correct answer: Loaner instruments must be received early enough for inspection, cleaning, assembly, sterilization, and biological indicator incubation before the scheduled procedure

Loaner instruments arrive in unknown conditions and must undergo the full reprocessing cycle. Timing is critical — they must arrive early enough for complete reprocessing including BI incubation for implant trays.

Question 34: What is an immediate-use steam sterilization (IUSS) cycle and what are its limitations?

A cycle that takes longer than standard sterilization
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 cycle used only for implants
A standard sterilization cycle with no limitations

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 35: 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 indicate the sterilization method required
To certify that a device has passed quality inspection
To track reimbursement billing codes

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 36: 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 cycles are significantly hotter.
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.

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 37: What is the role of humidity in ethylene oxide sterilization?

Humidity has no effect on ETO sterilization
Adequate humidity (typically 40-80% RH) is essential because moisture hydrates bacterial spores, making them more susceptible to ETO penetration and killing (Correct answer)
Humidity should be eliminated entirely for ETO to work
Humidity is only needed for the aeration phase

Correct answer: Adequate humidity (typically 40-80% RH) is essential because moisture hydrates bacterial spores, making them more susceptible to ETO penetration and killing

Bacterial spores in a desiccated (dried) state are more resistant to ETO. Humidity during the preconditioning and exposure phases rehydrates spores, allowing ETO gas to penetrate and alkylate the DNA and proteins, achieving microbial kill.

Question 38: What information must be included on the label of a sterilized package?

No labelling is required
Contents description, sterilizer number, cycle/load number, date of sterilization, and expiry date or event-related statement (Correct answer)
Only the technician's name
Only the date

Correct answer: Contents description, sterilizer number, cycle/load number, date of sterilization, and expiry date or event-related statement

Comprehensive labelling ensures traceability from the sterilized package back to the specific sterilization cycle. This is essential for quality assurance, recall management, and regulatory compliance.

Question 39: 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 cost of the container system compared to the old one.
The date it was received from the vendor.
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 40: 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 41: Which of the following is the most critical factor for achieving sterility in an autoclave, often referred to as the 'sterilant'?

Extended time
High pressure
Saturated steam (Correct answer)
Dry heat

Correct answer: Saturated steam

Saturated steam is the actual sterilizing agent in an autoclave. The moisture and heat from the saturated steam work together to destroy microorganisms through the irreversible coagulation and denaturation of enzymes and structural proteins. Time, temperature, and pressure are critical parameters, but they work to create and maintain the condition of saturated steam for direct contact with the items.

Question 42: What are routine practices (formerly universal precautions) in the context of infection prevention?

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

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

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

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 44: What types of packaging materials are acceptable for steam sterilization according to CSA standards?

Validated packaging materials such as sterilization wrap (SMS or crepe), peel pouches, rigid containers, and sterilization paper that allow steam penetration and maintain sterility (Correct answer)
Aluminum foil and plastic bags
Any fabric material
Ordinary brown paper bags

Correct answer: Validated packaging materials such as sterilization wrap (SMS or crepe), peel pouches, rigid containers, and sterilization paper that allow steam penetration and maintain sterility

Packaging for steam sterilization must allow steam penetration during the sterilization cycle and maintain a microbial barrier during storage. CSA Z314.8 specifies that only validated packaging materials designed for sterilization should be used.

Question 45: 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
Recording only the sterilizer model number
Tracking only the cost of sterilization consumables

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 46: A new technician in the decontamination area is observed placing heavy orthopedic instruments on top of delicate microsurgical instruments in the washer-disinfector basket. Which principle of decontamination is being violated?

Proper loading and arrangement of instruments (Correct answer)
Following manufacturer's instructions for use (IFU)
Use of appropriate personal protective equipment (PPE)
Verification of water quality

Correct answer: Proper loading and arrangement of instruments

Proper loading of automated washers is critical to ensure all surfaces are exposed to the cleaning process and to prevent damage to the instruments. Placing heavy items on top of delicate ones can cause damage and may prevent the water and detergent from reaching all surfaces of the instruments underneath. While following the IFU is always important, this scenario directly illustrates an error in the physical loading process.

Question 47: A Class III medical device is characterized by which of the following?

Lowest risk, subject to general controls only
Highest risk, requires premarket approval (PMA) (Correct answer)
Moderate risk, subject to special controls
Exempt from FDA regulation

Correct answer: Highest risk, requires premarket approval (PMA)

Class III devices pose the highest risk to patients and require FDA Premarket Approval (PMA) before marketing.

Question 48: What is a surgical site infection (SSI) and how can reprocessing failures contribute to it?

An infection at the IV insertion site
A skin irritation from surgical tape
An infection that only occurs in emergency surgeries
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)

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

Pasteurizer
Ultrasonic cleaner (Correct answer)
Autoclave
Washer-disinfector

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 50: 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?

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

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

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

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 52: What is the purpose of rinsing devices thoroughly after high-level disinfection?

To test the integrity of the device
To apply a protective coating
To remove residual disinfectant that could cause tissue irritation or toxicity in patients (Correct answer)
To warm the devices before use

Correct answer: To remove residual disinfectant that could cause tissue irritation or toxicity in patients

Residual high-level disinfectant on a medical device can cause chemical burns, irritation, or toxic reactions when the device contacts patient tissue. Thorough rinsing with appropriate quality water removes all chemical residue.

Question 53: Which types of materials are NOT compatible with hydrogen peroxide gas plasma sterilization?

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

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 54: Why is the drying phase important in steam sterilization?

The drying phase sterilizes the outside of packages
Drying makes instruments shine
Drying is optional and can be skipped to save time
Adequate drying prevents wet packs, which compromise the sterile barrier by allowing microbial migration through moisture on the packaging (Correct answer)

Correct answer: Adequate drying prevents wet packs, which compromise the sterile barrier by allowing microbial migration through moisture on the packaging

Residual moisture on sterilized packages (wet packs) creates a pathway for microorganisms to wick through the packaging material, compromising sterility. The drying phase uses vacuum and heat to remove condensate.

Question 55: What factors can cause a wet pack after a sterilization cycle?

Overloading the sterilizer, packages touching cold chamber walls, inadequate drying time, poor steam quality, or improper loading patterns (Correct answer)
Running the cycle at the correct temperature
Using validated packaging materials
Using distilled water in the sterilizer

Correct answer: Overloading the sterilizer, packages touching cold chamber walls, inadequate drying time, poor steam quality, or improper loading patterns

Wet packs result from condensation that fails to evaporate during the drying phase. Multiple factors contribute, including excessive load mass (too much condensation), cold surfaces causing extra condensation, insufficient drying time, and poor steam quality.

Question 56: What is the critical difference between high-level disinfection and sterilization?

There is no meaningful difference
High-level disinfection is only used for non-critical devices
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)
Sterilization is faster than high-level disinfection

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 57: What is the ozone sterilization method and what are its advantages?

An industrial sterilization method not used in healthcare
A low-temperature sterilization method using ozone gas (O3) that decomposes to oxygen, leaving no toxic residues on processed devices (Correct answer)
A high-temperature sterilization method using ozone-enriched steam
A method that uses UV light to generate ozone for surface disinfection only

Correct answer: A low-temperature sterilization method using ozone gas (O3) that decomposes to oxygen, leaving no toxic residues on processed devices

Ozone sterilization (such as the TSO3 system, developed in Canada) uses ozone gas at low temperatures. Its main advantage is that ozone naturally decomposes to oxygen, eliminating the need for aeration and leaving no toxic residues on devices.

Question 58: What is the correct initial action when loaner instrumentation is received by the sterile processing department?

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

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 59: 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.
Point-of-use pre-cleaning, leak testing, and thorough manual cleaning. (Correct answer)
Testing the MEC of the rinse water and initiating the thermal disinfection phase.

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

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

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 61: Which of the following best defines a 'loaner tray' in the context of sterile processing?

A tray lent to patients for home use after surgery
Disposable single-use instrument sets
Trays borrowed from another hospital department
Surgical instrument sets provided by a vendor or manufacturer for a specific procedure (Correct answer)

Correct answer: Surgical instrument sets provided by a vendor or manufacturer for a specific procedure

A loaner tray is a set of surgical instruments provided by a vendor or manufacturer, typically for specialty procedures, that the facility does not own and must return after use.

Question 62: What is the correct sequence of steps in the decontamination workflow?

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

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

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

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 64: How often should staff who perform high-level disinfection receive competency assessments?

At least annually, and whenever new equipment or procedures are introduced (Correct answer)
Every five years
Only during initial orientation
Competency assessments are not required for HLD

Correct answer: At least annually, and whenever new equipment or procedures are introduced

Annual competency assessments ensure that staff maintain their skills and knowledge of current procedures. Additional assessments are needed when new devices, chemicals, or equipment are introduced to the department.

Question 65: What is the primary purpose of enzymatic detergent in the decontamination process?

To sterilize instruments
To disinfect work surfaces
To lubricate instrument joints
To break down organic soil such as blood and tissue (Correct answer)

Correct answer: To break down organic soil such as blood and tissue

Enzymatic detergents contain specific enzymes (proteases, lipases, amylases) that break down organic matter like blood, tissue, and body fluids on instruments before further cleaning steps.

Question 66: Which of the following is an example of a high-level disinfectant approved for use in Canadian healthcare facilities?

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

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 67: What is the purpose of a 'one-way workflow' design principle in sterile processing departments related to transport?

To ensure contaminated items always move in a physical direction away from clean and sterile areas, preventing cross-contamination (Correct answer)
To reduce walking distance for sterile processing staff
To improve inventory management by separating instrument types
To comply with building fire codes requiring directional exit signage

Correct answer: To ensure contaminated items always move in a physical direction away from clean and sterile areas, preventing cross-contamination

One-way workflow physically separates the decontamination zone from clean and sterile areas, ensuring contaminated instruments never travel through or near sterile storage, reducing cross-contamination risk.

Question 68: Why must instruments with lumens receive special attention during decontamination?

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

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 69: 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?

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

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 70: A liver biopsy would be performed to check for which disease?

Hepatitis C virus (Correct answer)
None of the above
HIV Virus
CJD

Correct answer: Hepatitis C virus

A liver biopsy is a procedure in which a small piece of liver tissue is removed and examined under a microscope. It is commonly performed to diagnose and assess the severity of liver diseases. In this case, the correct answer is Hepatitis C virus because this virus specifically targets the liver and can cause chronic inflammation and damage to the liver cells. A liver biopsy can help determine the extent of liver damage caused by Hepatitis C virus and guide treatment decisions.

Question 71: 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 has no formal role; vendors manage their own instruments
The SPD manager's role is limited to approving invoices for loaner rentals
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 72: What is the proper response when a reprocessing breach (failure in the sterilization or disinfection process) is identified?

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)
Ignore it if no infections have been reported
Only document it for future reference
Wait until the next scheduled audit to report it

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

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

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

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

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 75: What should a reprocessing technician do immediately after sustaining a needlestick injury from a contaminated instrument?

Apply a bandage and continue working
Immediately wash the site with soap and water, report the incident to the supervisor, and seek medical assessment according to the facility's post-exposure protocol (Correct answer)
Continue working and report it at the end of the shift
Squeeze the wound vigorously to push out blood

Correct answer: Immediately wash the site with soap and water, report the incident to the supervisor, and seek medical assessment according to the facility's post-exposure protocol

Prompt first aid (washing with soap and water) and immediate reporting are essential for timely post-exposure assessment, prophylaxis (if indicated), and follow-up testing for bloodborne pathogens.

Question 76: 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
Saline solution
Protease-based enzymatic cleaner (Correct answer)

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 77: A surgical technologist hands off a set of powered surgical instruments after use. What specific point-of-use consideration applies to powered devices?

IFUs must be followed carefully as powered instruments often cannot be fully immersed; battery packs and motors must be handled per manufacturer specifications (Correct answer)
They can be fully submerged in enzymatic solution like manual instruments
They should be immediately placed in a steam sterilizer for flash sterilization
They require no special handling beyond standard instrument precautions

Correct answer: IFUs must be followed carefully as powered instruments often cannot be fully immersed; battery packs and motors must be handled per manufacturer specifications

Powered instruments have sensitive electronic components that may be damaged by immersion; IFUs specify appropriate point-of-use treatment such as wiping rather than soaking.

Question 78: 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?

Finish cleaning the current set of instruments before seeking help.
Apply a new pair of gloves over the punctured one and continue working.
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.

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 79: How does the medical device reprocessing department interact with other hospital departments?

The reprocessing department operates independently with no interaction with other departments
The department is a central support service that collaborates with the OR, infection prevention, nursing units, purchasing, biomedical engineering, and administration (Correct answer)
It only interacts with the operating room
Interactions are limited to sending and receiving instruments

Correct answer: The department is a central support service that collaborates with the OR, infection prevention, nursing units, purchasing, biomedical engineering, and administration

The reprocessing department is a hub that connects with multiple hospital departments. Effective collaboration ensures timely instrument availability, proper device maintenance, quality compliance, and patient safety.

Question 80: What are the requirements for transporting sterile items from the reprocessing department to clinical areas?

Any open cart is acceptable for transport
Sterile items should only be transported by pneumatic tube
Sterile items can be carried loosely by hand
Sterile items must be transported in closed or covered carts/containers that protect them from contamination, moisture, and physical damage during transit (Correct answer)

Correct answer: Sterile items must be transported in closed or covered carts/containers that protect them from contamination, moisture, and physical damage during transit

During transport, sterilized items are vulnerable to damage from physical impact, contamination from airborne particles, and moisture exposure. Enclosed transport systems protect the sterile barrier until items reach their destination.

Question 81: How should manufacturer's instructions for use (IFU) be managed in the reprocessing department?

IFU are only relevant for new equipment
IFU can be discarded after the first read
Only IFU for sterilizers are needed
Current IFU for every reusable device and chemical product must be accessible in the department, and reprocessing procedures must comply with them (Correct answer)

Correct answer: Current IFU for every reusable device and chemical product must be accessible in the department, and reprocessing procedures must comply with them

IFU provide the manufacturer's validated reprocessing instructions for their specific device or product. Following them is both a regulatory requirement and essential for patient safety, as deviating from IFU may result in reprocessing failure.

Question 82: What is the purpose of performing a protein residual test on cleaned instruments?

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

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 83: All of the following items of personal protective equipment should be worn when manually decontaminating flexible fiber-optic endoscopes EXCEPT

A lead apron (Correct answer)
A mask with side shields
Wrist-length gloves
An impervious gown.

Correct answer: A lead apron

A lead apron is not necessary when manually decontaminating flexible fiber-optic endoscopes. A lead apron is typically used in situations where there is a risk of radiation exposure, such as during X-ray procedures. However, when manually decontaminating endoscopes, the main concern is protecting against exposure to chemicals and infectious materials. Therefore, items such as a mask with side shields, an impervious gown, and wrist-length gloves are more appropriate.

Question 84: According to best practices, what should a comprehensive loaner instrument program include?

Vendor credentials and insurance documentation only
Only tracking of implantable devices post-procedure
Advance notification requirements, documentation requirements, and processing protocols (Correct answer)
Only the sterilization parameters for each instrument set type

Correct answer: Advance notification requirements, documentation requirements, and processing protocols

A comprehensive loaner program must address advance notification timelines, required documentation (IFUs, count sheets), and standardized processing protocols to ensure patient safety.

Question 85: What documentation is required after each flexible endoscope reprocessing cycle?

Only the endoscope model number
No documentation is needed if the process went smoothly
Patient name, endoscope serial number, reprocessing date/time, staff initials, AER cycle parameters, and chemical test results (Correct answer)
Only the date of reprocessing

Correct answer: Patient name, endoscope serial number, reprocessing date/time, staff initials, AER cycle parameters, and chemical test results

Comprehensive documentation enables traceability between patient, procedure, and reprocessing cycle. This is essential for quality assurance, outbreak investigation, and regulatory compliance in Canadian healthcare facilities.

Question 86: 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 only handles patient complaints
The IPAC committee provides oversight, policy development, surveillance, and outbreak investigation support for the reprocessing department (Correct answer)
The IPAC committee manages hospital finances

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 87: Which document must a sterile processing department maintain to demonstrate that a sterilizer has been properly validated for a specific load configuration?

Load qualification or validation records (Correct answer)
Infection control committee minutes
Employee time sheets
Purchase order

Correct answer: Load qualification or validation records

Load qualification/validation records document that a sterilization process has been tested and confirmed to achieve sterility for specific device types and load configurations.

Question 88: How far in advance of a scheduled surgical procedure should loaner instrumentation ideally arrive at the sterile processing department?

At least 24 hours before the procedure (Correct answer)
The morning of the procedure
30 minutes before the procedure
2 hours before the procedure

Correct answer: At least 24 hours before the procedure

IAHCSMM and AORN guidelines recommend loaner instrumentation arrive at least 24 hours in advance to allow sufficient time for decontamination, inspection, assembly, and sterilization.

Question 89: 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 prevent cross-contamination between soiled and clean/sterile items. (Correct answer)
To ensure technicians do not have to walk as far.
To improve the department's aesthetics and organization.
To make it easier for supervisors to monitor staff.

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 90: What type of brushes should be used to manually clean flexible endoscope channels?

Single-use brushes of the correct diameter specified by the endoscope manufacturer (Correct answer)
Any brush that fits loosely in the channel
Reusable cotton swabs
Metal wire brushes for thorough scrubbing

Correct answer: Single-use brushes of the correct diameter specified by the endoscope manufacturer

Single-use cleaning brushes of the correct size ensure effective soil removal without damaging the delicate channel lining. Reusable brushes can harbour microorganisms and contribute to cross-contamination.

Question 91: What is the minimum recommended contact time for most enzymatic detergents to be effective?

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

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

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 only affects medication choices, not reprocessing
AMR means instruments are resistant to cleaning
AMR makes instruments more durable

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

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

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

A ranking system for infection severity
A chain used to secure biohazard containers
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

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 95: 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
Ultrasonic cleaning
Thorough cleaning and rinsing (Correct answer)

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 96: How should a technician manage their time and prioritize tasks during a busy shift?

Prioritization is not necessary if you work fast enough
Prioritize based on clinical urgency (emergency cases first), scheduled surgery requirements, and quality standards — never sacrificing quality for speed (Correct answer)
Always process the fastest items first regardless of clinical need
Process whatever is nearest without any prioritization

Correct answer: Prioritize based on clinical urgency (emergency cases first), scheduled surgery requirements, and quality standards — never sacrificing quality for speed

Effective time management in reprocessing balances clinical urgency with quality standards. Emergency and time-sensitive cases take priority, but quality steps must never be shortened regardless of workload pressure.

Question 97: What are the three critical parameters that must be achieved for effective steam sterilization?

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

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.

Question 98: What is the technician's role in quality assurance and monitoring?

Quality monitoring is not part of the technician's role
Quality assurance is handled exclusively by external auditors
Only managers perform quality monitoring
Technicians are responsible for performing and interpreting routine quality tests including biological indicators, chemical indicators, cleaning verification, and equipment monitoring (Correct answer)

Correct answer: Technicians are responsible for performing and interpreting routine quality tests including biological indicators, chemical indicators, cleaning verification, and equipment monitoring

Frontline technicians are responsible for the day-to-day quality monitoring activities that verify the effectiveness of cleaning and sterilization processes. This includes running, reading, and acting on the results of various monitoring tests.

Question 99: A hospital's MDRD is processing a load containing both metal instruments and porous textile items. Which type of steam sterilization cycle is most appropriate for this mixed load?

A flash sterilization cycle
A dynamic air removal (prevacuum) cycle (Correct answer)
A dry heat sterilization cycle
A gravity displacement cycle

Correct answer: A dynamic air removal (prevacuum) cycle

A dynamic air removal cycle, such as a prevacuum or SFPP cycle, is the preferred method for sterilizing porous items like textiles and complex instruments. The active air removal ensures that steam can effectively penetrate the porous materials and lumens, which is a significant challenge for gravity displacement cycles where air can become trapped. Flash sterilization is for urgent, unwrapped items, and dry heat is a different method entirely.

Question 100: What must be done if the MEC test of a high-level disinfectant solution fails?

Heat the solution to restore its potency
Discard the solution immediately and replace with fresh disinfectant (Correct answer)
Add more water to dilute the solution
Continue using it for one more cycle only

Correct answer: Discard the solution immediately and replace with fresh disinfectant

A failed MEC test indicates the disinfectant can no longer achieve high-level disinfection. The solution must be discarded and replaced immediately — continuing to use it would put patients at risk of infection.

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.

Questions

180 min

Time Limit

70%

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