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Plasma thromboplastin antecedent deficiency
British Journal of Oral Surgery, 1972Summary Two cases of previously undiagnosed plasma thromboplastin antecedent deficiency are reported. The problems associated with the diagnosis and management of this condition are discussed. Recommendations are made for the control of this deficiency in routine cases.
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Activated Partial Thromboplastin Time
2013Activated partial thromboplastin time (APTT) is a commonly used coagulation assay that is easy to perform, is affordable, and is therefore performed in most coagulation laboratories, both clinical and research, worldwide. The APTT is based on the principle that in citrated plasma, the addition of a platelet substitute, factor XII activator, and CaCl2 ...
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Annales de biologie clinique, 1996
We have compared the INR obtained with three different thromboplastin reagents: one rabbit and two recombinant tissue factor thromboplastins using the same coagulometer. A preliminary study has shown that freezing of plasmas at -80 degrees centigrade causes a 6% increase in INR.
J L, Renier +2 more
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We have compared the INR obtained with three different thromboplastin reagents: one rabbit and two recombinant tissue factor thromboplastins using the same coagulometer. A preliminary study has shown that freezing of plasmas at -80 degrees centigrade causes a 6% increase in INR.
J L, Renier +2 more
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Thromboplastin Time (Prothrombin Time)
1965Publisher Summary This chapter elaborates thromboplastin time that is, prothrombin time. Blood plasma contains 300–400 mg% fibrinogen, and during coagulation of blood this is converted to insoluble fibrin by thrombin. The highly active enzyme thrombin is formed from an inactive precursor, prothrombin.
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Reappraisal of thromboplastin.
Annals of clinical and laboratory science, 1981Proficiency testing surveys in the state of New York indicate that despite increased sophistication in instrumentation, there has been no real improvement in interlaboratory reproducibility in prothrombin-time determinations over the last 10 years. This lack of improvement most pronounced in the therapeutic range of 20 to 30 sec. One reason may be that
F D, Ziegler +4 more
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