# N1 · Potassium Bath: Check the Trend

Match the potassium trend to the prescription, the patient, and a documented follow-up plan.

![Infographic: N1 · Potassium Bath: Check the Trend](https://urinenephrology.org/visual-reference/images/nursing-n01.png?v=20261003c)

## Before connecting

Compare today’s predialysis potassium with the last 2–3 results and the signed bath order. Check collection time, hemolysis, missed treatments, new medicines, symptoms, and recent hospitalization.

## Check an unexpected result

Hemolysis and collection problems can distort potassium. Request confirmation through the clinical pathway when a value is surprising; suspected severe hyperkalemia or symptoms require assessment without waiting for routine repeat testing.

## Understand the gradient

The difference between blood and dialysate potassium affects potassium removal and electrical stability. A simple arithmetic bath rule cannot account for every patient, rhythm risk, or treatment circumstance.

## Call now: potassium or symptoms

K ≥6.5 mEq/L, an ECG change, weakness, palpitations, syncope, or a slow pulse requires immediate clinician assessment under the unit pathway. Report K <3.5 mEq/L before treatment. Do not wait for routine repeat testing when the patient is unstable.

## Use the ordered bath

A 2K or 3K label is a prescription, not a nurse-selected arithmetic answer. Clarify any order below 2K or above 3K and its monitoring plan. Record when a temporary change ends; postdialysis rebound complicates immediate repeat results.

## Close the loop

Handoff the result and trend, symptoms, sample concerns, current bath, missed treatments, medicines, clinician response, and planned recheck. Confirm whether a temporary bath change ends before the next session.

## Source lessons

- [N1 Potassium Bath Selection](https://urinenephrology.org/mastery/maintenance-hd/nursing/N1-Potassium-Bath-Selection.html)

Read alongside the full lessons; the findings and decisions shown here require the stated clinical context.