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Related Experiment Videos

Developmental hemostasis: relevance to hemostatic problems during childhood

M Andrew1

  • 1Hamilton Civic Hospitals Research Center, Ontario, Canada.

Seminars in Thrombosis and Hemostasis
|January 1, 1995
PubMed
Summary

Pediatric hemostasis differs significantly from adults, impacting diagnosis and treatment of bleeding disorders. Understanding these age-related changes is crucial for effective management in children.

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Area of Science:

  • Pediatric Hematology
  • Hemostasis and Thrombosis
  • Clinical Coagulation

Background:

  • Congenital and acquired hemostatic disorders are common in children, necessitating accurate diagnosis for optimal therapy.
  • Significant age-dependent differences exist in plasma concentrations of hemostatic components between children and adults.
  • Physiological immaturity of the hemostatic system at birth influences coagulation, fibrinolysis, and response to therapies.

Purpose of the Study:

  • To review the age dependency of hemostasis throughout childhood.
  • To discuss the impact of the immature pediatric hemostatic system on diagnosing and treating hemostatic disorders.
  • To provide insight into the regulation of coagulation and fibrinolysis in children.

Main Methods:

  • Review of recent large-scale studies providing reference ranges for hemostatic components in healthy children.

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  • Analysis of age-specific data on coagulation and fibrinolysis in pediatric populations.
  • Comparison of pediatric hemostatic component levels and function to adult values.

    • Main Results:

    • New reference ranges for hemostatic components in children have been established through recent large studies.
    • Physiologically low levels of some factors can complicate diagnosis of congenital deficiencies.
    • Despite low inhibitor levels, thrombotic complications are rare in children; however, infants face risks like vitamin K deficiency bleeding.

    Conclusions:

    • Age-dependent variations in pediatric hemostasis significantly affect the diagnosis and treatment of hemostatic disorders.
    • Understanding these physiological differences is essential for appropriate clinical management in pediatric patients.
    • The immature hemostatic system in infants presents unique challenges, including altered responses to anticoagulants and thrombolytics.