During the period of July 1, 2011, through December 31, 2011, 813 wrong-patient medication errors were reported to the Pennsylvania Patient Safety Authority. These reports were analyzed to classify the events by node, related processes, possible causes, and contributing factors and to detect trends and noteworthy cases. Errors most often occurred during transcribing (38.3%, n = 311) and administration (43.4%, n = 353) and least during dispensing (5.2%, n = 42). Anti-infectives, opioids, and anticoagulants were the most common types of medications associated with wrong-patient events. While multiple factors may have contributed to each event, the most common were two patients being prescribed the same medication, improper verification of patient identification, and similar room numbers. Important risk reduction strategies include ensuring proper storage of medications and patient-specific documents, utilizing healthcare technology fully, limiting verbal orders, and improving patient verification throughout the medication-use process.
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