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Related Experiment Videos

[Hemostatic control in platelet dysfunction and abnormality by DDAVP].

M Mito1, W Higuchi, I Fuse

  • 11st Department of Internal Medicine, Niigata University School of Medicine.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|February 1, 1992
PubMed
Summary
This summary is machine-generated.

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Desmopressin (DDAVP) infusion shortens bleeding time in patients with platelet dysfunction by enhancing primary aggregation and dense body release, not by increasing clot retraction. This offers a potential hemostatic control mechanism.

Area of Science:

  • Hematology
  • Pharmacology

Context:

  • Platelet dysfunction can lead to prolonged bleeding times.
  • Desmopressin (DDAVP) is known to affect hemostasis.
  • The precise mechanism of DDAVP in platelet disorders requires further elucidation.

Purpose:

  • To investigate the mechanism by which DDAVP corrects or bypasses platelet release defects.
  • To evaluate the effect of DDAVP on bleeding time and platelet function in various conditions.

Summary:

  • DDAVP infusion was administered to 17 patients with prolonged bleeding time, including those with platelet dysfunction, idiopathic thrombocytopenic purpura (ITP), chronic myelocytic leukemia (CML), and an aspirin-ingested volunteer.
  • Bleeding time was shortened in 9 patients with platelet dysfunctions, one with ITP, and the aspirin volunteer.

Related Experiment Videos

  • No improvements in platelet aggregability or retention were observed, and platelet shape showed no activation signs. Clot retraction (RCof) increased in all patients post-infusion.

    • Impact:

    • DDAVP appears to improve hemostasis in specific platelet disorders.
    • The mechanism involves enhancing primary aggregation and dense body release.
    • DDAVP does not improve hemostasis through a direct increase in clot retraction.