MDRAO Assembly and Packaging Systems 4 — Questions and Answers
Question 1: A rigid sterilization container's filter retention plate is cracked. What is the correct course of action?
- Continue use if the filter appears intact
- Replace the container immediately and remove it from service (Correct answer)
- Cover the crack with heat-resistant tape
- Use it only for non-critical items
Correct answer: Replace the container immediately and remove it from service
A cracked retention plate cannot reliably secure the filter, compromising the sterile barrier; the container must be taken out of service for repair or replacement.
Question 2: Which wrapping material is preferred for items to be sterilized using hydrogen peroxide gas plasma (VPHP)?
- Woven cotton muslin
- Paper-plastic pouches
- Non-woven polypropylene (spunbond) wrap (Correct answer)
- Aluminum foil wrap
Correct answer: Non-woven polypropylene (spunbond) wrap
Cellulose-based materials (paper, muslin) absorb hydrogen peroxide and are incompatible with VPHP sterilization; non-woven polypropylene wraps are the correct choice.
Question 3: What is the function of a Bowie-Dick test when performed on a pre-vacuum steam sterilizer?
- Tests the sterility of the load
- Verifies the sterilizer's ability to remove air and penetrate porous loads (Correct answer)
- Measures the temperature inside instrument trays
- Validates the sealing integrity of packaging material
Correct answer: Verifies the sterilizer's ability to remove air and penetrate porous loads
The Bowie-Dick test detects air removal and steam penetration failures in pre-vacuum sterilizers, which is critical for ensuring sterilant contact with porous loads.
Question 4: Instruments with tungsten carbide inserts should be packaged in trays that include which of the following?
- High-pH cleaning solutions
- Silicone mats or foam inserts to prevent contact damage (Correct answer)
- Metal-on-metal contact surfaces for conductivity
- Chlorine-based moisture-absorbing pads
Correct answer: Silicone mats or foam inserts to prevent contact damage
Silicone or foam inserts protect delicate tungsten carbide inserts from impact damage during transport and sterilization cycles.
Question 5: Which of the following best describes the 'square fold' (envelope fold) wrapping method?
- The item is rolled diagonally into the center of a square wrap
- Each corner of the wrap is brought to the center sequentially, creating a neat envelope-style fold (Correct answer)
- The wrap is folded in thirds like a letter
- The item is placed in the center and all four sides are pulled straight up
Correct answer: Each corner of the wrap is brought to the center sequentially, creating a neat envelope-style fold
The envelope or square fold involves folding opposing corners sequentially to the center, producing a neat triangular flap opening that supports aseptic presentation.
Question 6: What is the purpose of instrument stringers or locks used during tray assembly?
- To keep ratcheted instruments in the closed position during sterilization
- To hold ringed instruments open for proper sterilant penetration (Correct answer)
- To secure instrument tips from contact with adjacent items
- To bundle instruments for faster counting
Correct answer: To hold ringed instruments open for proper sterilant penetration
Stringers hold ring-handled instruments in the open position so steam or other sterilants can penetrate the box locks and surfaces that would otherwise be shielded.
Question 7: What risk does placing a wet pack into the sterile storage area present?
- No risk if the sterilization cycle completed successfully
- Moisture wicks microorganisms through packaging, compromising sterility (Correct answer)
- Only a risk for paper-wrapped items, not rigid containers
- Increases the shelf life of the device
Correct answer: Moisture wicks microorganisms through packaging, compromising sterility
Residual moisture acts as a vehicle for microbial wicking through packaging materials, directly compromising the sterile barrier of the contents.
MDRAO Assembly and Packaging Systems 4
A rigid sterilization container's filter retention plate is cracked.
What is the correct course of action?