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Updated: Apr 22, 2026

A Precision Medicine Tool for Measurement and Monitoring of Hemoglobin S in Sickle Cell Disease Patients Receiving Transfusion Therapy
Physician attitude, awareness, and knowledge regarding guidelines for transcranial Doppler screening in sickle cell
Sarah L Reeves1, Heather J Fullerton2, Kevin J Dombkowski3
1University of Michigan, Ann Arbor, MI, USA sleasure@umich.edu.
Insights
Physician knowledge gaps and perceived barriers hinder adherence to transcranial Doppler (TCD) screening for children with sickle cell disease. Improving physician education and addressing external factors are crucial for guideline implementation.
Area of Science:
- Pediatric Neurology
- Hematology
- Medical Education
Background:
- Sickle cell disease (SCD) increases stroke risk in children.
- Transcranial Doppler (TCD) ultrasonography is recommended for stroke risk screening in SCD.
- Physician adherence to TCD screening guidelines is essential for early detection and prevention.
Purpose of the Study:
- To investigate factors influencing physician adherence to TCD screening guidelines in pediatric SCD.
- To identify internal (physician-related) and external (system-related) barriers to TCD screening.
- To compare adherence and perceived barriers across different physician specialties.
Main Methods:
- A mailed survey was distributed to 706 pediatric hematologists, neurologists, and primary care physicians in May 2012.
- The survey assessed physician knowledge, self-efficacy, and perceived internal and external barriers to TCD screening.
- Responses were analyzed using chi-square tests to compare data across specialties.
Main Results:
- Of 276 surveyed physicians, 141 treated children with SCD, and 72% recommended TCD screening.
- A significant majority of primary care physicians (66%) felt uninformed about TCD guidelines, unlike neurologists (25%) and hematologists (6%).
- Knowledge assessment scores were low (13%-35%), and external barriers included distance to vascular labs and low patient adherence.
Conclusions:
- Physician knowledge deficits and low self-efficacy regarding TCD screening recommendations require further investigation.
- Addressing physician-perceived barriers and enhancing educational outreach are vital for improving TCD screening adherence.
- Optimizing TCD screening protocols can enhance stroke prevention strategies in pediatric SCD patients.
Objective:
We explored factors that may influence physician adherence to transcranial Doppler (TCD) screening guidelines among children with sickle cell disease.
Methods:
Pediatric hematologists, neurologists, and primary care physicians (n = 706) responded to a mailed survey in May 2012 exploring factors hypothesized to influence physician adherence to TCD screening guidelines: physician (internal) barriers and physician-perceived external barriers. Responses were compared by specialty using chi-square tests.
Results:
Among 276 physicians (44%), 141 currently treated children with sickle cell disease; 72% recommend screening. Most primary care physicians (66%) did not feel well informed regarding TCD guidelines, in contrast to neurologists (25%) and hematologists (6%, P < .0001). Proportion of correct answers on knowledge questions was low (13%-35%). Distance to a vascular laboratory and low patient adherence were external barriers to receipt of TCD screening.
Conclusions:
Additional research regarding physicians' lack of self-efficacy and knowledge of recommendations could help clarify their role in recommendation of TCD screening.
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