SPD Instrument Inspection 2 — Questions and Answers
Question 1: What is the purpose of using a magnifying glass or lighted magnification during instrument inspection?
- To read the manufacturer's label
- To detect minute cracks, pitting, burrs, and residual soil invisible to the naked eye (Correct answer)
- To count the number of instruments in a set
- To verify the sterilization indicator has changed color
Correct answer: To detect minute cracks, pitting, burrs, and residual soil invisible to the naked eye
Magnification reveals microscopic defects and residual contamination that could compromise instrument function or patient safety if undetected.
Lighted magnification is an essential quality assurance tool during instrument inspection. It allows technicians to detect micro-cracks in instrument jaws that could harbor bioburden, pitting and corrosion in early stages, burrs on cutting edges that could damage tissue, residual organic soil in serrations, lumens, and hinges, and staining that indicates improper cleaning or water quality issues. AAMI recommends magnified visual inspection as part of routine quality checks, with many facilities using 2.5x to 3.5x magnification lamps at inspection stations.
Question 2: How should box locks on hemostatic forceps be tested during inspection?
- By applying maximum force to the handles
- By opening and closing to verify smooth operation and secure ratchet engagement at each position (Correct answer)
- By autoclaving and checking for discoloration
- By submerging in enzymatic cleaner and observing for bubbles
Correct answer: By opening and closing to verify smooth operation and secure ratchet engagement at each position
Box locks should be tested by cycling through all ratchet positions to ensure smooth movement and secure locking, which is critical for maintaining hemostasis during surgery.
Testing box locks involves opening the instrument fully and closing it through each ratchet position, verifying: the jaws align properly when closed, the ratchet engages securely at every click position, there is no excessive play or looseness in the joint, the instrument doesn't spring open when locked, and the jaws meet evenly along their full length. A common test is the 'tap test' — locking the instrument at the first ratchet and tapping it lightly against a solid surface. If it springs open, the box lock is worn and the instrument should be removed from service for repair.
Question 3: What visual indicator suggests an instrument has been exposed to a harsh chemical or improper cleaning process?
- A slightly warm surface
- Unusual staining, discoloration, or a rainbow-like appearance on the surface (Correct answer)
- The instrument feels lighter than normal
- The instrument has a strong metallic smell
Correct answer: Unusual staining, discoloration, or a rainbow-like appearance on the surface
Staining, discoloration, or rainbow patterns on stainless steel instruments indicate chemical damage from improper cleaning agents, hard water deposits, or incompatible solutions.
Several visual indicators suggest chemical damage during inspection: Brown/orange staining indicates exposure to saline solutions left to dry, or use of chloride-containing cleaners. Black staining suggests contact with ammonia-based products. Rainbow-colored films (light interference patterns) result from chromium oxide layer disruption, often caused by harsh chemicals or extreme pH solutions. Blue-gray discoloration indicates excessive heat exposure. White chalky deposits suggest hard water mineral buildup. Technicians who identify these patterns should investigate the cleaning process, water quality, and chemical concentrations to prevent ongoing damage.
Question 4: Why must insulated electrosurgical instruments be tested for current leakage before reuse?
- To verify the instrument is properly cleaned
- To prevent unintended burns to the patient or surgical team from compromised insulation (Correct answer)
- To check the battery level
- To calibrate the electrosurgical generator
Correct answer: To prevent unintended burns to the patient or surgical team from compromised insulation
Damaged insulation on electrosurgical instruments can cause current leakage, resulting in unintended burns to patients or surgical team members.
Insulated electrosurgical instruments carry electrical current to targeted tissue during surgery. If the insulation develops even a pinhole defect, current can leak through the break and cause burns to adjacent tissue or the surgical team. These insulation failures are often invisible to the naked eye. Specialized insulation testing devices apply a controlled voltage across the insulation and detect any current leakage. ECRI Institute and AAMI recommend testing all insulated electrosurgical instruments after every use. Instruments that fail testing must be immediately removed from service for re-insulation or disposal.
Question 5: What is the correct action when an instrument is found to have a broken tip during inspection?
- File down the broken area and return to service
- Remove from service, tag for repair, and check if the broken piece was recovered from the surgical site (Correct answer)
- Discard immediately without documentation
- Return to the tray with a note about the defect
Correct answer: Remove from service, tag for repair, and check if the broken piece was recovered from the surgical site
A broken instrument tip is a critical safety issue — the fragment must be accounted for to ensure it wasn't retained in a patient, and the instrument must be removed from service.
Discovering a broken instrument tip triggers a specific protocol: (1) Immediately remove the instrument from service and isolate it, (2) Notify the surgical team and perioperative leadership — the missing fragment may need to be located in the patient via x-ray, (3) Document the finding with details including instrument type, set, procedure used in, and nature of the break, (4) Tag the instrument for biomedical engineering evaluation, (5) File an incident report per facility policy, and (6) If the fragment is unaccounted for, it becomes a retained foreign body concern requiring immediate clinical follow-up. This is a patient safety event that requires complete documentation and root cause analysis.
Question 6: What does the term 'passivation' refer to in instrument maintenance?
- Applying lubricant to instrument joints
- The formation of a protective chromium oxide layer on stainless steel that resists corrosion (Correct answer)
- Sharpening cutting instruments
- Removing rust from instrument surfaces
Correct answer: The formation of a protective chromium oxide layer on stainless steel that resists corrosion
Passivation is the chemical process that creates a protective chromium oxide layer on stainless steel, shielding it from corrosion and extending instrument life.
Passivation is the process by which stainless steel instruments form a thin, protective chromium oxide layer on their surface. This invisible layer acts as a barrier against corrosion. New instruments come with a factory-applied passivation layer, but it can be damaged by harsh chemicals, abrasive cleaning, or mixing dissimilar metals. Re-passivation can be performed by treating instruments with specific acid solutions (typically nitric or citric acid) that remove free iron from the surface and promote formation of a new chromium oxide layer. Proper cleaning and handling practices help maintain this protective layer throughout the instrument's service life.
SPD Instrument Inspection 2
What is the purpose of using a magnifying glass or lighted magnification during instrument inspection?