Reducing Erythrocyte Sedimentation Rate Ordering: De-implementation and Diagnostic Stewardship.

Objectives: The Choosing Wisely campaign recommends against the routine use of erythrocyte sedimentation rate (ESR) for the assessment of acute undiagnosed inflammation or infection. We examined ESR and C-reactive protein (CRP) ordering practices at a large, freestanding children's hospital. We found that 80% of ESR orders were placed concurrently with a CRP order. We aimed to reduce the ESR testing rate by 20% within 6 months in both inpatient and emergency department (ED) settings.

Methods: Applying Lean process improvement principles, we interviewed stakeholders from multiple subspecialties and engaged the institutional laboratory stewardship committee to identify the root causes of ESR ordering and design interventions. We conducted provider education (November 2020) and employed clinical decision support through an order panel in the electronic health record (April 2021). The outcome measures were monthly ESR testing rate per 1000 patient days (inpatient) and per 1000 ED visits, analyzed using statistical process control charts. CRP testing rate was a balancing measure.

Results: After intervention implementation, the ESR testing rate decreased from 11.4 to 8.9 tests per 1000 inpatient patient days (22% decrease) and from 49.4 to 29.5 tests per 1000 ED visits (40% decrease). This change has been sustained for >1 year postintervention. Interventions were effective even during the coronavirus disease 2019 pandemic when there was a rise in baseline ED ESR ordering rate. CRP testing rates did not increase after the interventions.

Conclusions: Education and clinical decision support were effective in reducing the ESR ordering rate in both inpatient and ED settings.