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The impact of computerized physician order entry on medication error prevention
1Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA. dwbates@bics.bwh.harvard.edu
Summary
Computerized physician order entry (POE) significantly reduced medication errors by 81%. Advanced decision support features further enhanced safety, decreasing serious errors by 86%.
Area of Science:
- Health Informatics
- Patient Safety
- Clinical Pharmacy
Background:
- Medication errors are frequent in hospitals, causing extra work and potential harm.
- A small fraction of medication errors lead to preventable adverse drug events.
Purpose of the Study:
- To assess the impact of computerized physician order entry (POE) with decision support on medication error rates.
- To quantify reductions in medication errors following POE implementation.
Main Methods:
- Prospective time series analysis over four periods.
- Study included patients across three medical units over multiple years.
- Intervention involved implementing POE with decision support (allergy, drug-drug interaction alerts).
Main Results:
- Non-missed-dose medication errors decreased by 81% (142 to 26.6 per 1,000 patient-days).
- Serious medication errors with injury potential dropped by 86% from baseline to the final period.
- Significant reductions observed in dose, frequency, route, substitution errors, and allergy-related errors.
Conclusions:
- Computerized POE substantially lowers non-missed-dose medication errors.
- Initial POE versions achieved major error reduction; decision support further improved outcomes.
- Implementing POE is an effective strategy for enhancing medication safety in hospitals.