Instrumentation Inspection, Testing, and Maintenance
This domain tests what you do after cleaning and before packaging: inspecting instruments under magnification, function-testing them, checking insulation and channels, and deciding whether an item can be used, repaired, or retired. Exam items often hide a defect that only one test would reveal.
Core rules
- Inspect under adequate light and magnification; look for cracks, pitting, corrosion, staining, residual soil, and missing parts. Compare against the manufacturer's instructions for use (IFU).
- Function-test each instrument type: ratchets and box locks engage smoothly, jaws align without gaps, scissors cut test material cleanly along the full blade, needle holders grip without slipping, and hinges move without stiffness.
- Flexible and rigid endoscopes need channel inspection, leak testing before and after each use, and insulation checks for laparoscopic and electrosurgical instruments; damaged insulation can cause patient burns.
- Lubricate only with sterilant-compatible, manufacturer-approved products, and only where the IFU says to. Excess lubricant traps soil and interferes with sterilization.
- Tag out-of-service items clearly, document the defect, and route them to repair; do not return them to the tray because the set is incomplete.
- Preventive maintenance schedules and repair records support both patient safety and survey compliance.
Worked example
A laparoscopic grasper looks clean and its jaws close, but the insulation near the tip has a pinhole. Reasoning: visual inspection alone is insufficient. Perform the insulation and leak tests required by the IFU; a failed test means the instrument must be removed from service, tagged, and repaired or replaced. Sterilizing it would expose the next patient to electrical burn risk.
Traps that cost marks
Items that look clean but fail function tests; skipping leak testing because the scope was just repaired; using the wrong lubricant; re-adding a defective instrument to complete a set; assuming a repaired instrument needs no inspection before its first use.