Below-MCE Solution and a Wet Scope in the Cabinet

Affected by the MCE failure: every scope soaked in that basin since the solution was changed Monday. A reading below MCE means the solution cannot be relied on to achieve high-level disinfection, so those scopes are not high-level disinfected, no matter how long they soaked. Quarantine them, tag them, and do not use them.

Affected by the storage breach: the duodenoscope that was hung wet. Residual moisture in the channels and elevator mechanism supports biofilm formation and waterborne organisms (Pseudomonas, atypical mycobacteria, Candida). A wet scope in a closed cabinet is not ready for use.

Before any scope is used:

1. Remove the basin from service immediately, discard the solution, and label the basin as out of service.
2. Repeat full manual cleaning and high-level disinfection in a system with verified in-date chemistry and a passing MCE test for every quarantined scope; a scope that cannot be verified is held.
3. Do not schedule cases on the assumption the scopes will be ready - notify the charge nurse, the manager, and the physician leads so the schedule is adjusted rather than improvised.
4. Escalate the Tuesday ERCP patients to infection prevention and physician leadership for a notification decision. That decision is not the bedside nurse's to make alone, but flagging it is.
5. Fix the storage cabinet issue - scopes must hang vertically, uncapped, in a ventilated cabinet, after an alcohol flush and forced-air drying.

The technician's "twice is fine" reasoning fails because HLD is a chain, not a coat of paint; repeating a step that occurred with sub-therapeutic chemistry does not substitute for a valid cycle.

• Leak test (before immersion): detects a breach in the scope's seals before fluid enters the interior. Skip it and you can destroy the scope and push contaminated fluid into channels you cannot clean.
• Manual cleaning before HLD: the critical step. HLD chemicals cannot penetrate blood, mucus, or biofilm; retained bioburden protects organisms and neutralizes the disinfectant locally. This is why "we soaked it longer" is not a remedy - the debris is still there.
• Correct contact time and temperature at or above MCE: below MCE, the exposure is not high-level disinfection regardless of duration.
• Alcohol flush and forced-air drying: residual water in channels is the substrate for biofilm. Duodenoscopes, with their elevator mechanism and tight crevices, are the highest-risk scope in the unit for this reason.
• Ventilated, vertical, uncapped storage: a closed, damp cabinet traps humidity and creates a microenvironment for gram-negative water organisms. Coiled or capped storage prevents drainage and drying.

Teach-back approach: ask the tech to explain what happens to a droplet of water left in a channel over 48 hours, and what HLD does to a channel that already has biofilm in it. If the tech cannot articulate it, the gap is a competency gap, not an attitude problem.

Document objectively and contemporaneously: the MCE reading and the time it was taken, the log entries and the pattern since Monday, the basin taken out of service, which scopes were quarantined and why, the condition of the duodenoscope (wet, closed cabinet, connector attached), the patients and dates potentially exposed, the names and times of people notified, and the actions taken.

You may act alone on: stopping use of the basin and the scopes, removing them from circulation, and notifying the charge nurse and the physician performing cases that the schedule will change. These are within the nurse's scope as an immediate safety measure.

Must go up the chain: the decision to notify and screen patients, the review of reprocessing practice and competency validation, and any determination about patient harm. Route these to infection prevention, the endoscopy medical director, and risk management. File an incident report per policy - it is a factual safety report, not a disciplinary complaint.

Avoid: rewriting or "correcting" the log, back-dating anything, or letting the technician's initials stand in for the nurse's verification. If a supervisor directs you to use a non-compliant scope, document the directive and escalate to nursing leadership - a physician's or manager's instruction does not convert a contaminated scope into a safe one.