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Updated: May 3, 2026

A Precision Medicine Tool for Measurement and Monitoring of Hemoglobin S in Sickle Cell Disease Patients Receiving Transfusion Therapy
The proportion of potentially preventable emergency department visits by patients with sickle cell disease
Mark Nimmer1, Raymond G Hoffmann, Mahua Dasgupta
1Departments of *Pediatric Emergency Medicine †Quantitative Health Sciences ‡Pediatric Hematology, Medical College of Wisconsin, Milwaukee, WI.
Background:
Emergency department (ED) visits by children with sickle cell disease (SCD) are often classified as urgent based on resource utilization. This classification may not accurately reflect the potentially preventable nature of SCD visits. We sought to determine the proportion of SCD crisis-related pediatric ED visits that are possibly preventable.
Procedure:
We reviewed 2 years of ED visits with a diagnosis of SCD with crisis at a hospital with an established sickle cell program. Criteria for preventable visits were predefined by pediatric hematologists. Non-pain-related chief complaints requiring emergent evaluation or painful episodes preceded by 2 opioid doses were considered not preventable; others were potentially preventable.
Results:
The study included 603 visits by 187 patients; 33% were potentially preventable. Overall, 29% of visits were emergent based on non-pain-related emergent complaints. Of the remaining pain-related visits, 26% were preceded by 2 or more doses of opioids at home. Visits by children with asthma were 0.58 times as likely to be preventable, due to more non-pain-related emergent chief complaints (32%) and more children (36%) taking 2 or more opioid doses.
Conclusions:
Approximately two thirds of SCD crisis-related pediatric ED visits are not immediately preventable; that percentage is higher in children with asthma.
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