CIS Instrument Inspection and Testing Questions and Answers 2 — Questions and Answers
Question 1: What is the primary purpose of performing a sharpness test on scissors?
- To determine if they need lubrication
- To verify they can cut through standard test material cleanly and completely (Correct answer)
- To check the alignment of the blades
- To measure the overall length of the blades
Correct answer: To verify they can cut through standard test material cleanly and completely
Sharpness testing verifies that scissors can cut through standard test material cleanly to the tips without folding or tearing.
Scissors sharpness testing uses standardized materials such as yellow test material or latex to evaluate cutting performance. The scissors should cut smoothly from pivot to tip without catching or requiring excessive force. Dull scissors can cause tissue trauma during surgery.
Question 2: How should box lock joints on hemostats and clamps be inspected?
- By verifying they open to exactly 90 degrees
- By checking for cracks, looseness, and proper alignment of the jaws (Correct answer)
- By measuring the gap between the jaws with a feeler gauge
- By testing them under an ultraviolet light
Correct answer: By checking for cracks, looseness, and proper alignment of the jaws
Box lock joints should be inspected for cracks, looseness or wobble when jaws are closed, and proper alignment of jaw tips and serrations.
Box lock inspection involves visual examination for cracks or stress fractures, testing for lateral play by applying side-to-side pressure with jaws closed, verifying jaw alignment, and checking that serration patterns mesh correctly when closed.
Question 3: What does a stiff or difficult-to-operate ratchet on a surgical instrument indicate?
- The instrument is brand new and needs breaking in
- Possible corrosion, debris buildup, or lack of lubrication (Correct answer)
- Normal wear that does not affect function
- The ratchet needs to be tightened
Correct answer: Possible corrosion, debris buildup, or lack of lubrication
A stiff ratchet typically indicates corrosion, mineral deposits, debris accumulation, or insufficient lubrication within the mechanism.
Ratchets should engage and release smoothly with one-handed operation. Stiffness can result from corrosion, mineral deposits from hard water, tissue debris trapped in the mechanism, or lack of instrument lubricant. The instrument should be sent for repair or deep cleaning.
Question 4: What visual indicator suggests that a surgical instrument has been exposed to excessive heat?
- Bright silver polished appearance
- Blue, brown, or rainbow discoloration on the surface (Correct answer)
- Small scratches on the handle
- Slight flexibility in the shaft
Correct answer: Blue, brown, or rainbow discoloration on the surface
Blue, brown, or rainbow discoloration on stainless steel instruments indicates exposure to excessive temperatures, which can compromise instrument integrity.
Heat tinting appears as blue, brown, gold, or rainbow-colored oxide layers on stainless steel surfaces when exposed to temperatures exceeding the recommended range. This indicates the chromium oxide passive layer has been compromised, leading to accelerated corrosion.
Question 5: Why is it important to test the insulation on electrosurgical instruments during inspection?
- To verify the color coding is still visible
- To detect cracks or defects that could cause unintended burns to the patient (Correct answer)
- To ensure the instrument conducts electricity properly
- To check that the insulation matches original specifications
Correct answer: To detect cracks or defects that could cause unintended burns to the patient
Insulation testing detects micro-cracks, pinholes, or defects that could allow electrical current to escape and cause thermal injury to patient tissue during electrosurgery.
Electrosurgical instruments rely on intact insulation to confine electrical current to the active electrode tip. Insulation defects as small as a pinhole can allow current leakage, causing burns outside the surgeon's field of view. Studies show up to 39% of reusable instruments have insulation defects.
Question 6: What is the correct procedure when an instrument fails inspection?
- Return it to the sterile field with a note about the defect
- Tag it and remove it from service for repair or replacement (Correct answer)
- Continue using it until a replacement arrives
- Place it at the bottom of the instrument tray
Correct answer: Tag it and remove it from service for repair or replacement
Instruments that fail inspection must be immediately tagged, removed from service, and sent for professional repair or disposal.
Failed instruments must be immediately removed from the tray, tagged with a description of the defect, placed in a designated repair area, documented in the tracking system, and sent for professional repair or disposal. The set should be completed with a replacement.
CIS Instrument Inspection and Testing Questions and Answers 2
What is the primary purpose of performing a sharpness test on scissors?