Addressing diagnostic errors to improve outcomes and patient safety has long been a problem in the US healthcare system.¹ Many methods of reducing diagnostic error focus on individual factors and single cases, instead of focusing on the contribution of system factors or looking at diagnostic errors across a disease or clinical condition. Instead of addressing individual cases, KP sought to improve the disease diagnosis process and systems. The goal was to address the systemic root cause issues in systems that lead to diagnostic errors.

Concern over patient safety issues associated with inadequate tracking of test results has grown over the last decade, as it can lead to delays in the recognition of abnormal test results and the absence of a tracking system to ensure short-term patient follow-up.^1,2 Missed abnormal tests and the lack of necessary clinical follow-up can lead to a late diagnosis.

Throughout 2022, AHRQ PSNet has shared research that elucidates the complex nature of misdiagnosis and diagnostic safety. This Year in Review explores recent work in diagnostic safety and ways that greater safety may be promoted using tools developed to improve diagnostic practices.

A 61-year-old women with a mechanical aortic valve on chronic warfarin therapy was referred to the emergency department (ED) for urgent computed tomography (CT) imaging of the right leg to rule out an arterial clot. CT imaging revealed two arterial thromboses the right lower extremity and an echocardiogram revealed a thrombus near the prosthetic heart valve. The attending physician ordered discontinuation of warfarin and initiation of a heparin drip.

The focus on patient safety in the ambulatory setting was impacted by the COVID-19 pandemic and appropriately shifting priorities to responding to the pandemic. This piece explores some of the core themes of patient safety in the ambulatory setting, including diagnostic safety and diagnostic errors. Ways to enhance patient safety in the ambulatory care setting and next steps in ambulatory care safety are addressed. 

A 58-year-old man with a past medical history of seizures presented to the emergency department (ED) with acute onset of left gaze deviation, expressive aphasia, and right-sided hemiparesis. The patient was evaluated by the general neurology team in the ED, who suspected an acute ischemic stroke and requested an evaluation by the stroke neurology team but did not activate a stroke alert. The stroke team concluded that the patient had suffered a focal seizure prior to arrival and had postictal deficits.

The Revised Safer Dx Instrument provides a standardized list of questions to help users retrospectively identify and assess the likelihood of a missed diagnosis in a healthcare episode. Results of the assessment are intended for use in system-level safety improvement efforts, clinician feedback, and patient safety research.