Three infiltrations on the evening shift
Your 12-station unit had three arteriovenous fistula infiltrations in six weeks. All three occurred on the evening shift and all on fistulas less than four months old. Two of the three were recognized at handoff rather than at the time of the stick. One was self-reported by the tech. The two techs involved are relatively new to cannulation. The nurse manager asks you to 'write up both of them so HR can deal with it,' noting that the day shift had no infiltrations in the same period. Staff are already joking that the evening shift 'can't stick.' You are the CCHT preceptor on the unit.
1. How do you respond to the manager's request, and what is the right first step?
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Push back on the framing, not on accountability.
Say this: three events in six weeks is a signal about a process, not proof of two bad employees. Writing them up before understanding the system makes staff hide the next event - and one of these was already self-reported, which is exactly the behavior you want to protect.
Apply a just-culture screen to each of the three events separately:
- Human error (a mature-looking fistula that infiltrated despite correct technique) → console, support, fix the system.
- At-risk behavior (cannulating without assessing thrill and bruit, or not re-checking a new fistula before the needle is taped) → coach, remove the drift, retrain.
- Reckless behavior (knowingly cannulating a site that was already infiltrated) → that is where formal action belongs.
First step: a non-punitive review of the three incident reports plus short, separate conversations with each tech about what they saw and decided at the time. Look for workload, assignment patterns, needle gauge or taping changes, and whether either tech had been signed off for new-fistula cannulation. Then tell the manager what you found - before anyone is written up.
2. Design a small improvement you could test on the evening shift, including how you would measure whether it worked.
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Change to test (one change, four weeks, evening shift only): a documented pre-cannulation access assessment - thrill, bruit, arm inspection, and comparison with the previous stick sites - plus a second-tech confirmation for any fistula under six months old before the needle is taped. Nothing else changes, so you can attribute any movement to this.
Process measures (weekly):
- % of cannulations with the assessment documented.
- % of new-fistula cannulations with second-tech confirmation.
- Minutes from stick to recognition for any event.
Outcome measure: infiltrations per 1,000 cannulations, plotted by shift.
Handle the statistics honestly. Three events is far too few for a significance test. Use a run chart and look for a shift in the pattern, not a p-value. Compare rates per cannulation, not raw counts, and be explicit that the day shift's zero could be chance.
Also run a second driver diagram line: standardize who cannulates new fistulas and add a short supervised practice block for the two newer techs. Re-measure after four weeks and decide to adopt, adapt or abandon - then spread to days only if it holds.
3. What do you tell the three affected patients, and what do you document?
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Tell each patient, briefly and honestly, at the chair: what happened (the needle came out of the vein and fluid went into the tissue), what was done about it, what they should watch for (swelling, pain, numbness, redness), and who to call. Apologize that it happened without assigning blame in front of them, and tell them what the unit is changing so it is less likely to recur. If a patient asks whether a specific tech will be disciplined, say that staffing matters are handled privately, and redirect to what affects their care.
Document, objectively, in the medical record: time of cannulation, site and needle gauge, when the swelling was first noted and by whom, interventions and times, the provider notification, and the patient's response. Avoid conclusions ('tech was careless') and avoid speculation about cause - describe what was observed.
Separately file the incident report per policy, complete and factual, and route it to the QAPI process. Do not put the incident report or its contents in the medical record, do not discuss either tech's performance with patients or with other staff who do not need to know, and make sure the self-reporting tech is thanked for reporting rather than quietly discouraged.