MDRAO Introduction 5 — Questions and Answers
Question 1: Which area of the medical device reprocessing department (MDRD) is considered the 'cleanest' and must be physically separated from other zones?
- Decontamination area
- Sterile storage area (Correct answer)
- Instrument inspection area
- Receiving dock
Correct answer: Sterile storage area
The sterile storage area must be kept separate and maintained at the highest cleanliness standard to prevent contamination of processed items.
Question 2: What is the primary reason single-use devices (SUDs) should not be reprocessed unless following strict regulatory requirements?
- They are too expensive to reprocess
- The manufacturer validated them for one use only; reprocessing may compromise safety, sterility, and function (Correct answer)
- They are always made of plastic that melts
- Regulatory agencies prohibit all SUD reprocessing without exception
Correct answer: The manufacturer validated them for one use only; reprocessing may compromise safety, sterility, and function
Manufacturers validate SUDs for a single use, and reprocessing may alter device integrity, leave residues, or fail to achieve sterility.
Question 3: What does 'event-related sterility' mean in medical device reprocessing?
- Sterility is guaranteed for a set number of years
- Sterility is maintained until the package is damaged, wet, or opened — not based solely on a calendar date (Correct answer)
- Devices are re-sterilized after every calendar month
- Sterility is only valid during specific hospital events
Correct answer: Sterility is maintained until the package is damaged, wet, or opened — not based solely on a calendar date
Event-related sterility means the sterile barrier is maintained until a physical event (damage, moisture, opening) compromises the package.
Question 4: Which microorganism is considered the most resistant to sterilization and is commonly used in biological indicators for steam sterilization?
- Staphylococcus aureus
- Escherichia coli
- Geobacillus stearothermophilus (Correct answer)
- Candida albicans
Correct answer: Geobacillus stearothermophilus
Geobacillus stearothermophilus spores are the most heat-resistant microorganisms and serve as the gold standard BI for steam sterilization.
Question 5: A reprocessing technician notices rust on a surgical instrument during inspection. What is the most appropriate action?
- Proceed with sterilization — heat will eliminate the rust
- Return the instrument to service after wiping off visible rust
- Remove the instrument from service and report it for evaluation or replacement (Correct answer)
- Soak the instrument in bleach to remove the rust
Correct answer: Remove the instrument from service and report it for evaluation or replacement
Rusted instruments are compromised and must be removed from service because rust can harbor microorganisms and the instrument may fail during use.
Question 6: What is the purpose of an enzymatic detergent in the cleaning process of medical instruments?
- To sterilize instruments in place of an autoclave
- To break down proteins, fats, and carbohydrates in organic soil to aid cleaning (Correct answer)
- To rust-proof stainless steel surfaces
- To neutralize chemical disinfectants on instrument surfaces
Correct answer: To break down proteins, fats, and carbohydrates in organic soil to aid cleaning
Enzymatic detergents contain enzymes that break down complex organic compounds, improving cleaning efficacy on contaminated instruments.
Question 7: Which of the following is an example of a chemical indicator (CI) used in sterilization monitoring?
- A biological indicator vial containing bacterial spores
- An integrating indicator strip that changes color when exposed to sterilization parameters (Correct answer)
- A temperature gun used to measure autoclave surface heat
- A log book recording sterilization cycle times
Correct answer: An integrating indicator strip that changes color when exposed to sterilization parameters
Chemical indicators change color or form in response to one or more physical or chemical sterilization parameters, providing immediate process confirmation.
MDRAO Introduction 5
Which area of the medical device reprocessing department (MDRD) is considered the 'cleanest' and must be physically separated from other zones?