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Sci J Iran Blood Transfus Organ 2014; 11(2): 110-115
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The correlation of factor VIII and von Willebrand levels
with clinical symptoms in obligate carriers of
hemophilia A in Isfahan
Fatehifar M.R.1,2, Horfar H.3, Akbari N.1,2, Eshraghi M.4, Hojatifar M.5,
Motamedi N.5, Shahinpour Z.1,2
1Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
2Isfahan Regional Educational Blood Transfusion Center, Isfahan, Iran
3Isfahan University of Medical Sciences, Isfahan, Iran
4Comprehensive Haemophilia Treatment Center, Tehran, Iran
5Seyed-al-Shohada Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract
Background and Objectives
Bleeding tendency in obligate carriers of hemophilia A has been found since several years ago; some of haemophiliacs with factor levels of 40-60% also have abnormal bleeding. The present study is to measure factor VIII and von Willebrand levels and evaluate their correlation with clinical finding in obligate carriers.
Materials and Methods
In this cross-sectional study conducted 49 obligate carriers of Haemophilia A. F.VIII,
vWF: Ag, PT, and APTT levels were checked and their correlationship with the bleeding score was evaluated and analyzed.
Results
Fourty-Nine Obligate carriers included in the study. The mean of PT, PTT , F.VIII,
vWF: Ag and bleeding score (BS) were 12.6 ± 1.3, 36.3 ± 4.2, 52.5 ± 22.6, 83.7 ± 35.2, and 1.5 ± 1.7, respectively. The present study showed only 4% (2) of the carriers having had bleeding score (BS) equal to 5 and higher. Only F.VIII /
vWF: Ag positively correlated with BS significantly (p = 0.006).
Conclusions
The present study showed that PT, PTT, and F.VIII levels and the bleeding score alone could not be helpful in screening obligate carriers. It seems that only determination of F.VIII/
vWF: Ag ratio be helpful hn carrier states. But definitive diagnosis carrier states is by molecular genetic testing.
Key words: IRAN, Hemophilia A, Hemorrhage, Carrier State
Received: 15 Apr 2012
Accepted: 11 Jan 2014
Correspondence: Akbari N., MD. Blood Transfusion Research Center, High Institute for Research and Education in
Transfusion Medicine and Isfahan Regional Educational Blood Transfusion Center.
P.O. Box: 81688-44861, Isfahan, Iran. Tel: (+98311) 2607074; Fax: (+98311) 2607074
E-mail:
nah_akbari@yahoo.com