16.3 Equipment Inspection & Maintenance

16.3 Equipment Inspection & Maintenance

Quick Answer: Check that gear works and is electrically intact before and after cases; send routine problems to scheduled biomedical service; impound (tag, sequester, report) any device that may have hurt a patient or could fail the same way again.

Domain V expects the technologist to recognize when equipment is fit for patient use and when it must leave the clinical pool. Monitoring quality and patient safety both depend on amplifiers, stimulators, cables, and headboxes that are intact — not merely “good enough to finish today’s list.”

Working-Order Checks (Pre-Case)

A working-order check is a short, systematic confirmation that the system will acquire and stimulate safely before the patient is committed to monitoring:

1. Power and boot: Cart powers from an approved source; system starts without error storms.
2. Channel integrity: Test or verify that recording channels respond (impedance check, calibration, or known test signal per lab protocol).
3. Stimulator output: Confirm stimulator self-test / expected behavior before relying on it for baselines.
4. Cables and connectors: Visual inspection for cracks, exposed conductors, bent pins, crushed strain reliefs, and fluid intrusion.
5. Accessories: Enough intact electrodes, bite block if MEPs planned, backups for critical cables.
6. Biomed status: Current preventive-maintenance (PM) / safety-check tag when your facility uses dated clearance stickers.

If anything fails the working-order check, obtain a replacement unit or cable before induction when possible. Starting a case on known-bad equipment to “save time” transfers risk to the patient and the team.

Post-Operative Inspection

After teardown, inspect again while failures are fresh:

• Re-examine cables as you disconnect (amplifier end first to protect pins, then inspect and coil loosely).
• Look for new nicks from clamps, cautery, or bed mechanisms.
• Note heat, odor, or discoloration suggesting overheating.
• Confirm connectors are dry before storage; moisture accelerates corrosion and leakage risk.
• Segregate damaged items immediately — do not toss a cracked cable back into the “good” drawer.

Post-op inspection is also when you catch problems that appeared mid-case (a channel that died after repositioning, a stimulator that became intermittent). Document what you saw; tomorrow’s technologist cannot guess.

Pre-case working-order check → Case → Teardown
        ↓
Post-op visual/functional inspection
        ↓
    ┌───────────────┴───────────────┐
    ↓                               ↓
Routine issue                    Safety/harm concern
(schedule PM / repair tag)       (IMPOUND: sequester +
                                 notify + document +
                                 patient assessment)

Routine Service vs Impoundment

Not every problem is a crisis, but some are.

Routine service / biomedical repair

Use ordinary remove-from-service tagging when you find:

• Cracked connector housings or damaged insulation (electrical safety defect, no known patient injury)
• Intermittent channel dropout or unreliable acquisition
• Frayed stimulator leads discovered before injury
• Overdue PM sticker without an acute incident
• Noncritical mechanical issues that still deserve a work order (e.g., chronically failing brake) when they impair safe use

Process: remove from clinical service → attach service tag (date, problem, technologist name) → send to biomedical engineering → do not return to the clean cart until cleared.

Impoundment

Impound when malfunction may have harmed the patient or could recur as a sentinel-type event. Classic example: a preamplifier that overheated and may have delivered excess current.

Impoundment steps:

1. Remove from service immediately — do not wipe and reuse on the next case.
2. Tag with date, time, description of the failure, case identifiers as required, and your name.
3. Sequester the device (and relevant accessories/cables in the failure path) — preserve as evidence; often do not clean in a way that destroys residues or settings needed for investigation (follow facility policy).
4. Document the event in the medical record / incident system as required.
5. Notify supervisor and patient safety / risk management.
6. Assess the patient for injury with the surgical/anesthesia team.
7. Allow biomedical engineering and possibly the manufacturer to investigate before any return-to-service decision.

Exam trap: Returning a malfunctioning device to service “to see if it happens again” is never acceptable after suspected patient harm. Disposing of electronics in regular trash destroys evidence and is inappropriate.

Distinguishing Cosmetic from Safety Failures

CNIM items often test whether you escalate the right findings:

• Safety / function failures: exposed conductors, cracked housings, intermittent channels, overheating, failed stimulator self-test, frayed high-current leads.
• Not automatic impoundment: slightly coiled but intact cable, minor cosmetic scuffs, a wheel that is a bit stiff, color-coding quirks that do not create wiring errors.

Judgment still matters: if a “cosmetic” crack progresses to exposed metal, it becomes a safety failure the moment conductors are visible.

Maintenance Culture and Accountability

• Follow manufacturer IFU and facility biomedical schedules for electrical safety testing.
• Keep loaner/backup critical cables so tagging one out does not cancel monitoring.
• Report near misses (almost used a cracked cable) so inventory and inspection habits improve.
• Do not borrow unmarked personal adapters or non-medical power gear to “make the cart work.”

Equipment inspection is a professional duty under Safety and Ethics, not busywork. The technologist who tags a cracked cable prevents the burn the next team never sees.

Key Takeaways

• Working-order checks before cases and inspections after cases catch electrical and functional failures early
• Routine biomed tagging removes unsafe or unreliable gear from the clinical pool until cleared
• Impoundment sequesters evidence and triggers patient-safety notification when harm is possible
• Know the difference between cosmetic annoyances and true safety/function failures
• Never return an overheating or suspected over-current device to service for a trial run