Implementation of a pragmatic emergency department patients’ own medications (POM) procedure to improve medication safety: An interrupted time series

Background

Patients’ Own Medications (POMs) are useful to inform clinical decision-making, best possible medication history documentation, and ensure timely medication administration. A procedure was developed for managing POMs specifically in the emergency department (ED) and short stay unit. This study evaluated the impact of this procedure on process and patient safety outcomes.

Methods

An interrupted time-series was undertaken in a metropolitan ED/short stay unit between November 2017 and September 2021. Pre-implementation and during each of four post-implementation time-periods, data were collected at unannounced times on approximately 100 patients taking medications prior to presentation. Endpoints included proportion of patients with POMs stored in green POMs bags, in standardised locations, and proportion who self-medicated without nurses knowing.

Results

Following procedure implementation, POMs were stored in standardised locations for 45.9 % of patients. Proportion of patients with POMs stored in green bags increased from 6.9 % to 48.2 % (difference 41.3 %, p < 0.001). Patient self-administration without nurses’ knowledge declined from 10.3 % to 2.3 % (difference 8.0 %, p = 0.015). POMs were infrequently left in ED/short stay unit after discharge.

Conclusions

The procedure has standardised POMs storage, but room for further improvement remains. Although POMs were not locked away and were readily available to clinicians, patient self-medication without nurses’ knowledge declined.