CMDRT - Certified Medical Device Reprocessing Technician Instrument Assembly and Packaging Questions and Answers — Questions and Answers
Question 1: When assembling an instrument set, where should the internal chemical indicator be placed to provide the most effective verification of sterilant penetration?
- In the geometric center of the set or the area deemed most difficult for the sterilant to reach. (Correct answer)
- Taped to the outside of the wrapped tray for easy visibility after the cycle.
- Placed on top of the instruments, just beneath the final layer of wrapping.
- In any corner of the tray, as the sterilant will disperse evenly throughout the package.
Correct answer: In the geometric center of the set or the area deemed most difficult for the sterilant to reach.
According to CDC and AAMI guidelines, the internal chemical indicator should be placed in the area considered most challenging for the sterilant to penetrate, which is typically the geometric center of the instrument set or pack. This placement ensures that if the indicator shows a pass, the sterilant has reached the most difficult area, providing a higher level of assurance for the entire set.
Question 2: A technician is packaging a single, lightweight hemostat for steam sterilization. Which of the following is the most appropriate packaging method?
- A rigid sterilization container.
- A sequential, non-woven sterilization wrap.
- A paper-plastic peel pouch. (Correct answer)
- A Tyvek pouch.
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 3: A newly assembled orthopedic tray is found to weigh 12 kg (approximately 26.5 lbs). According to CSA standard Z314, what is the most appropriate action for the reprocessing technician?
- Proceed with wrapping and sterilizing the tray as is.
- Add a special heavy-duty indicator to the tray before sterilization.
- Double-wrap the tray using a heavyweight wrap to support it.
- Re-assemble the contents into two separate, lighter trays. (Correct answer)
Correct answer: Re-assemble the contents into two separate, lighter trays.
CSA standards specify a maximum weight limit for instrument trays to ensure proper sterilant penetration, drying, and safe manual handling. The commonly accepted maximum weight is 10 kg (22 lbs). A tray weighing 12 kg exceeds this limit and must be broken down into smaller, lighter sets to comply with standards and ensure effective sterilization.
Question 4: Which of the following is a critical step when using a heat sealer to close a sterilization peel pouch?
- 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.
- Verifying the sealer provides a complete, uniform seal without any gaps, wrinkles, or bubbles. (Correct answer)
- Folding the end of the pouch over several times before inserting it into the heat sealer.
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 5: When assembling instruments with hinges, such as forceps or scissors, into a tray for sterilization, what is the correct practice?
- Instruments should be closed and locked in the final ratcheted position.
- Instruments should be placed in the open, unlocked position on a stringer or rack. (Correct answer)
- Instruments should be held together tightly with elastic bands.
- Instruments should be disassembled completely, if possible, and placed in separate pouches.
Correct answer: Instruments should be placed in the open, unlocked position on a stringer or rack.
Hinged instruments must be placed in an open and unlocked position to allow the sterilant to come into direct contact with all surfaces, including the box locks and serrations, which are difficult areas to clean and sterilize. Using a stringer or rack helps maintain this open position. Closing or locking the instruments prevents sterilant penetration. Elastic bands should not be used as they can melt or prevent sterilant contact.
Question 6: What is the primary reason for ensuring there is adequate space (e.g., a 1-inch border) around an item inside a peel pouch?
- To allow space for writing labeling information directly on the pouch.
- To prevent the sharp edges of the instrument from puncturing the pouch.
- To facilitate adequate air removal, sterilant penetration, and drying. (Correct answer)
- To make the package easier for the end-user to grip and open.
Correct answer: To facilitate adequate air removal, sterilant penetration, and drying.
Leaving adequate space around the item is crucial for the sterilization process itself. It ensures that air can be properly removed during the cycle, allows the sterilant (e.g., steam) to circulate freely and contact all surfaces of the device, and facilitates proper drying at the end of the cycle. While preventing puncture is a benefit, the primary process-related reason is circulation and penetration.
CMDRT - Certified Medical Device Reprocessing Technician Instrument Assembly and Packaging Questions and Answers
When assembling an instrument set, where should the internal chemical indicator be placed to provide the most effective verification of sterilant penetration?