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Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload
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The pathophysiology, prevention, and treatment of stroke in sickle cell disease

Winfred C Wang1

  • 1Department of Hematology, St Jude Children's Research Hospital, Memphis, TN 38105, USA. winfred.wang@stjude.org

Current Opinion in Hematology
|April 7, 2007
PubMed

Insights

Advances in sickle cell disease research offer new stroke prevention strategies. Transcranial Doppler screening improves primary stroke prevention, while hydroxyurea shows promise for secondary stroke prevention, potentially reducing reliance on transfusions.

Area of Science:

  • Neurology
  • Hematology
  • Vascular Medicine

Background:

  • Stroke is a major complication of sickle cell disease (SCD).
  • Recent research has enhanced understanding of SCD-related central nervous system (CNS) events.
  • New approaches for primary and secondary stroke prevention are emerging.

Purpose of the Study:

  • To review recent advances in the understanding and prevention of stroke in SCD.
  • To highlight new insights into the pathogenesis of CNS complications in SCD.
  • To discuss novel strategies for primary and secondary stroke prevention.

Main Methods:

  • Review of recent scientific literature (past 2 years) on SCD and stroke.
  • Analysis of emerging concepts in SCD pathophysiology, including hemolytic anemia and nitric oxide metabolism.
  • Evaluation of current and investigational stroke prevention strategies.

Main Results:

  • Pathophysiology insights focus on hemolytic anemia, nitric oxide metabolism, and genetic risk factors.
  • Transcranial Doppler (TCD) ultrasonography shows significant potential for primary stroke prevention, though utilization is suboptimal.
  • Hydroxyurea is being investigated as an alternative to chronic transfusion for secondary stroke prevention.
  • Research is also addressing silent infarcts and nocturnal hypoxemia management.

Conclusions:

  • Enhanced understanding of stroke etiology in SCD will improve CNS complication management.
  • Hydroxyurea offers a potential alternative to lifelong transfusions for secondary stroke prevention.
  • Widespread TCD screening could dramatically reduce stroke incidence in SCD patients.
Abstract

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