New formulas for mixing test to discriminate between lupus anticoagulant and acquired hemophilia A

被引:9
|
作者
Kumano, Osamu [1 ,2 ]
Ieko, Masahiro [1 ]
Naito, Sumiyoshi [3 ]
Yoshida, Mika [3 ]
Takahashi, Nobuhiko [1 ]
Suzuki, Takeshi [1 ,2 ]
Komiyama, Yutaka [2 ]
机构
[1] Hlth Sci Univ Hokkaido, Dept Internal Med, Sch Dent, 1757 Kanazawa, Ishikari, Hokkaido 0610293, Japan
[2] Sysmex Corp, Hemostasis Prod Engn, Kobe, Hyogo, Japan
[3] Hlth Sci Univ Hokkaido, Sch Dent, Dept Clin Lab, Ishikari, Hokkaido, Japan
关键词
Antiphospholipid syndrome; Lupus coagulation inhibitor; Partial thromboplastin time; Factor 8 deficiency acquired; Diagnosis; INTERNATIONAL CONSENSUS STATEMENT; OF-THE-LITERATURE; ANTIPHOSPHOLIPID SYNDROME; CIRCULATING ANTICOAGULANT; CLASSIFICATION CRITERIA; CUTOFF VALUE; GUIDELINES; DIAGNOSIS; INDEX; ANTIBODIES;
D O I
10.1016/j.thromres.2016.05.004
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Introduction: Lupus anticoagulant (LA) is an antibody that interferes with in vitro coagulation reactions. The mixing test is considered useful for LA diagnosis and is also recommended to differentiate between acquired hemophilia A (AHA) and factor deficiency. However, there has been little study to differentiate between LA and AHA. Our aims are to investigate whether we can differentiate LA and AHA by the mixing test and to establish new formulas for the mixing test to differentiate these samples clearly. Materials and methods: We examined 27 LA-positive, 29 coagulation factor deficient, 24 unfractionated heparin and 48 AHA samples. Index of circulating anticoagulant (ICA) values, calculated from the clotting times without incubation and after 2 h incubation, were defined as ICA immediate (ICAi) and ICA delayed (ICAd) respectively. ICAd/ICAi and ICAd - ICAi were also calculated to compare the sensitivity and specificity. Results: ICAd/ICAi and ICAd - ICAi for AHA samples were significantly higher than those of the other sample groups. The sensitivities to AHA in ICAi, ICAd, ICAd/ICAi and ICAd - ICAi were 66.7%, 81.3%, 93.8% and 91.7% respectively, while the specificities for AHA were 45.0%, 66.3%, 85.0% and 98.8% respectively. ICAd/ICAi and ICAd - ICAi showed high sensitivity and specificity. Conclusions: ICAd/ICAi and ICAd - ICAi were useful for LA and AHA diagnosis, because these could differentiate between LA and AHA samples. These new formulas can contribute to the rapid diagnosis and treatment of LA and AHA. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:53 / 57
页数:5
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