F0760

G

Failure to Follow PRN Diuretic Order Leads to Significant Weight Loss and Hypokalemia

Longmont, Colorado Survey Completed on 03-10-2026

Penalty

Fine: $53,550

Summary

The deficiency involves the facility’s failure to ensure a resident was free from significant medication errors when a diuretic, metolazone, was entered and administered as a scheduled daily medication instead of as a PRN medication with specific weight-based parameters. After an acute hospitalization for conditions including acute on chronic CHF, acute respiratory failure with hypoxia, COPD, atrial fibrillation, hypertension, morbid obesity, COVID-19, and MDRO history, the resident was readmitted to the facility. The hospital discharge order specified metolazone 2.5 mg to be taken once daily as needed for pulmonary edema due to chronic heart failure, only when the resident had a weight gain of 5 lbs over baseline, and to be given 30 minutes prior to Lasix. However, when the orders were transcribed into the facility’s EMR on readmission, metolazone was entered as a scheduled daily medication without PRN parameters, and this incorrect order did not match the hospital discharge instructions.

The assistant DON, who entered the readmission orders from the hard-copy discharge packet because the phone lines were down and the usual electronic admission process was not used, input metolazone as a daily scheduled medication. The normal process of having two nurses verify and enter orders was not completed; the ADON entered the orders alone, and the second nurse verification did not occur. As a result, nursing staff administered metolazone 2.5 mg daily for eight days, in addition to the resident’s other diuretics (Lasix and spironolactone), without confirming that the resident had experienced the required 5 lb weight gain from baseline. The MAR documented daily administration of metolazone over this period, including on days when no weight was obtained, and on days when the resident’s weight was stable or decreasing rather than increasing.

During this time, the resident experienced significant weight loss and symptoms consistent with a change in condition. Weight records showed a decline from approximately 190 lbs prior to hospitalization to 176.6 lbs when the error was identified, reflecting a loss of about 12–14 lbs over a short period. The resident and her representative reported that she became severely weak, excessively tired, and felt she could not regain her strength, with the representative describing the resident as very tired, exhausted, and feeling as though she could not “hang on any longer.” Clinical documentation noted significant weakness, excessive sleepiness during therapy, and that the resident was triggering for significant weight loss. Laboratory testing later showed hypokalemia, with a potassium level of 3.2 mEq/L. Interviews with nursing staff, the DON, the ADON, the PCP, the pharmacist, the resident, and the resident’s representative consistently attributed the resident’s weight loss, weakness, and low potassium at least in part to the erroneous daily administration of metolazone instead of PRN dosing based on weight gain.

The facility’s own medication error policy defined a medication error as preparation or administration of medications not in accordance with the prescriber’s order, manufacturer’s specifications, or accepted professional standards, and defined a significant medication error as one that causes resident discomfort or jeopardizes health and safety. In this case, the metolazone order in the EMR did not reflect the prescriber’s PRN order with weight-based parameters, and the medication was administered without verifying the required 5 lb weight gain. The resident’s care plan for diuretic therapy called for administering diuretics as ordered, monitoring for side effects such as fatigue and increased fall risk, and reporting pertinent lab results, including potassium. Staff interviews acknowledged that the error persisted for about eight days, that medication reconciliation was not completed upon readmission, and that the lack of a second nurse verification contributed to the error. The pharmacist and PCP described the effects of metolazone, especially in combination with Lasix, as including electrolyte abnormalities, weight loss, and weakness, and characterized the error as moderate, with the potential to increase electrolyte depletion and require close monitoring.