Medication errors involving patient-controlled analgesia.

Area of Science:

• Pharmacology
• Patient Safety
• Health Informatics

Background:

• Patient-controlled analgesia (PCA) is a widely used method for pain management.
• Medication errors associated with PCA can lead to patient harm and increased healthcare costs.

Purpose of the Study:

• To analyze the magnitude, frequency, and nature of nonharmful and harmful medication errors related to PCA.
• To identify the causes and contributing factors of PCA medication errors.

Main Methods:

• Retrospective analysis of the Medmarx national voluntary medication error-reporting database (July 2000–June 2005).
• Inclusion of 9,571 PCA-related medication error records from 801 facilities.
• Quantitative and qualitative analysis of error severity, type, cause, contributing factors, and drugs/staff involved.

Main Results:

• 1% of all medication errors (9,571/919,241) were PCA-related; 6.5% of these (624) resulted in patient harm.
• Errors occurred across all medication-use phases, predominantly during administration.
• Improper dosage (38%), omission (17.4%), and wrong drug (17.3%) were common error types. Human factors (distractions, inexperienced staff) were the leading causes.

Conclusions:

• Medication errors in PCA occur throughout the medication-use process.
• These errors, often stemming from human factors, can lead to significant patient harm and require substantial resources.