OBJECTIVE: To assess the impact of our transcranial Doppler ultrasonography (TCD) program on the incidence of first stroke and the rate of transfusion for stroke prevention in children with sickle cell disease. STUDY DESIGN: In this single-institution, retrospective study, we compared the incidence of stroke and of transfusion for stroke prevention in 475 patients observed in the 8-year period before instituting TCD screening with the rate in 530 children in the 8-year period after. RESULTS: The incidence of overt stroke in the pre-TCD period was 0.67 per 100 patient-years, compared with 0.06 per 100 patient-years in the post-TCD period (P<.0001). Of the 2 strokes in the post-TCD period, 1 occurred in a child too young for the screening protocol, and 1 occurred in a child with high velocities solely in the anterior cerebral arteries. The rate of transfusion therapy for stroke prevention increased from 0.67 per 100 patient-years to 1.12 per 100 patient-years since instituting our program (P=.008). CONCLUSIONS: Our program has been successful in reducing the rate of first overt stroke, but with increased use of transfusion. Additional modifications to screening might further reduce the risk of first stroke, and studies of alternative treatments may be beneficial. Copyright (c) 2010 Mosby, Inc. All rights reserved.
OBJECTIVE: To assess the impact of our transcranial Doppler ultrasonography (TCD) program on the incidence of first stroke and the rate of transfusion for stroke prevention in children with sickle cell disease. STUDY DESIGN: In this single-institution, retrospective study, we compared the incidence of stroke and of transfusion for stroke prevention in 475 patients observed in the 8-year period before instituting TCD screening with the rate in 530 children in the 8-year period after. RESULTS: The incidence of overt stroke in the pre-TCD period was 0.67 per 100 patient-years, compared with 0.06 per 100 patient-years in the post-TCD period (P<.0001). Of the 2 strokes in the post-TCD period, 1 occurred in a child too young for the screening protocol, and 1 occurred in a child with high velocities solely in the anterior cerebral arteries. The rate of transfusion therapy for stroke prevention increased from 0.67 per 100 patient-years to 1.12 per 100 patient-years since instituting our program (P=.008). CONCLUSIONS: Our program has been successful in reducing the rate of first overt stroke, but with increased use of transfusion. Additional modifications to screening might further reduce the risk of first stroke, and studies of alternative treatments may be beneficial. Copyright (c) 2010 Mosby, Inc. All rights reserved.
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