Table 1.

Laboratory evaluation of the proband

Laboratory testProband dataNormal range
PT, seconds 18.4 11.1-13.1  
aPTT, seconds 48.7 25.0-34.0  
Fibrinogen, (μmol/L) 6.1 4.9-12.1 
 (mg/dL) (208) (170-410) 
Factor II, % 94 83-117  
Factor V, % 111 50-150 
Factor VII, % 70 65-135  
Factor VIII, % 59 55-145 
Factor IX, % 74 60-140  
Factor X, % 81 45-156 
Factor XI, % 76 75-135  
Factor XII, % 82 50-150 
Thrombin time, seconds 20.1 18.0-22.0  
Antithrombin III function, % 90 80-180  
Antithrombin III antigen, mg/L 260 210-350 
 (mg/dL)  (26) (21-35) 
vWF, ristocetin cofactor 54 45-140  
Bleeding time, minutes 6.0 3.0-8.0  
Platelet number and aggregation Normal — 
RVVT, seconds 26.6 25-30  
Protein C, % 68 55-140 
Activated protein C resistance, ratio 2.8 2.2-4.0 
Laboratory testProband dataNormal range
PT, seconds 18.4 11.1-13.1  
aPTT, seconds 48.7 25.0-34.0  
Fibrinogen, (μmol/L) 6.1 4.9-12.1 
 (mg/dL) (208) (170-410) 
Factor II, % 94 83-117  
Factor V, % 111 50-150 
Factor VII, % 70 65-135  
Factor VIII, % 59 55-145 
Factor IX, % 74 60-140  
Factor X, % 81 45-156 
Factor XI, % 76 75-135  
Factor XII, % 82 50-150 
Thrombin time, seconds 20.1 18.0-22.0  
Antithrombin III function, % 90 80-180  
Antithrombin III antigen, mg/L 260 210-350 
 (mg/dL)  (26) (21-35) 
vWF, ristocetin cofactor 54 45-140  
Bleeding time, minutes 6.0 3.0-8.0  
Platelet number and aggregation Normal — 
RVVT, seconds 26.6 25-30  
Protein C, % 68 55-140 
Activated protein C resistance, ratio 2.8 2.2-4.0 

PT indicates prothrombin time; aPTT, activated partial thromboplastin time, AT3, antithrombin III; vWF, von Willebrand factor; RVVT, Russell viper venom time.

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