The prevalence of factor VIII inhibitor in patients with severe hemophilia-A and its clinical characteristics

  • Harijadi Harijadi
  • Djajadiman Gatot
  • Arwin AP Akib
Keywords: severe hemophilia-A, factor VIII inhibitor, prevalence

Abstract

Background Hemophilia is a hereditary blood-clotting disorder
due to factor VIII deficiency. Up to this date, the administration of
factor VIII in preventing and managing bleeding has been the main
treatment. One of the complications, which may occur due to re-
peated administrations of factor VIII, is the formation of factor VIII
antibody (factor VIII inhibitor).
Objective To find out the prevalence of severe hemophilia-A with
factor VIII inhibitor and its clinical characteristics.
Methods A cross-sectional descriptive study was performed on
children with severe hemophilia-A at the National Hemophilia Care
Centre, Cipto Mangunkusumo Hospital, Jakarta, Indonesia, in June-
August 2004.
Results Out of 45 children studied, 16 had factor VIII inhibitor with
average inhibitor titre of 1.15 Bethesda units (BU) (range 0.15-15
BU). Most of them (12 patients) had inhibitor titre <5 BU. Chronic
arthropathy was found in 17 out of 45 (37%) children with severe
hemophilia-A, consisting of nine patients from positive inhibitor
group and 8 patients from negative inhibitor group. Thirty-nine
patients (86%) used an on-demand treatment pattern, among whom
15 had positive inhibitor. Among patients receiving prophylactic
treatment pattern, only one had positive inhibitor. There were 39
patients (86%) treated using cryoprecipitate, among whom factor
VIII inhibitor was found in 12, while among those treated with fac-
tor VIII concentrate, the inhibitor was positive in 4/6. The average
amount of factor VIII transfused in positive and negative factor VIII
inhibitor groups was similar.
Conclusion The prevalence of factor VIII inhibitor in severe he-
mophilia-A patients was 35%. Chronic arthropathy occurred more
often in patients with positive factor VIII inhibitor. Factor VIII inhibi-
tor was found more frequently in patients with an on-demand treat-
ment pattern and in those using factor VIII concentrate

Author Biographies

Harijadi Harijadi
Department of Child Health, Medical School, University of
Indonesia, Jakarta, Indonesia.
Djajadiman Gatot
Department of Child Health, Medical School, University of
Indonesia, Jakarta, Indonesia.
Arwin AP Akib
Department of Child Health, Medical School, University of
Indonesia, Jakarta, Indonesia.

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Published
2016-10-10
How to Cite
1.
Harijadi H, Gatot D, Akib A. The prevalence of factor VIII inhibitor in patients with severe hemophilia-A and its clinical characteristics. PI [Internet]. 10Oct.2016 [cited 23Dec.2024];45(4):177-1. Available from: https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/832
Section
Articles
Received 2016-10-08
Accepted 2016-10-08
Published 2016-10-10