Medication-error alerts for warfarin orders detected by a bar-code-assisted medication administration system.

Area of Science:

• Clinical Informatics
• Pharmacology
• Patient Safety

Background:

• Bar-code-assisted medication administration (BCMA) systems aim to improve patient safety by reducing medication errors.
• Warfarin, a common anticoagulant, requires careful dosing and monitoring due to its narrow therapeutic index.
• Alerts generated by BCMA systems are intended to flag potential medication errors.

Purpose of the Study:

• To evaluate the clinical significance of medication-error alerts for warfarin orders generated by a BCMA system.
• To assess the rate of true positive versus false positive alerts in warfarin administration.
• To determine the potential impact of these alerts on patient harm.

Main Methods:

• A retrospective review of warfarin orders and associated BCMA alerts was conducted at a university medical center.
• Alerts were analyzed to determine if they represented a true potential medication error.
• A validated severity scale (0-10) was used by pharmacists to rate the potential for patient harm for each alert.

Main Results:

• Out of 18,393 warfarin doses, only 99 alerts (0.5%) were deemed clinically meaningful.
• The mean severity rating of clinically meaningful alerts was low (2.93 ± 1.42).
• The majority of alerts (70%) occurred in patients with an existing warfarin order.

Conclusions:

• A small proportion of BCMA-generated medication-error alerts for warfarin are clinically significant.
• The study identified a high rate of false-positive alerts, which can lead to alert fatigue.
• Reducing false-positive alerts is crucial for maintaining the effectiveness of BCMA systems in enhancing patient safety.