Effects of storage time and temperature on coagulation tests and factors in fresh plasma.
Coagulation tests and factors measurements have been widely applied in clinical practice. Pre-analytical conditions are very important in laboratory assessment.Here,we aim to determine the effects of storage time and temperature on activated partial thromboplastin time (APTT), fibrinogen (Fbg), prothrombin time (PT), the international normalized ratio (INR), thrombin time (TT), factor VIII activity (FVIII:C), and factor IX activity (FIX:C) in fresh plasma. Seventy-two blood samples were tested after storage for 0 (baseline), 2, 4, 6, 8, 12, and 24 h at 25°C (room temperature) and 4°C (refrigeration) in two centers. The mean percentage change of greater than 10% and the numbers of samples with greater than 10% percentage changes more than 25% were used to determine clinically relevant difference. We demonstrated that samples for Fbg, PT/INR, and TT could be safely stored for ≤24 h; FVIII:C for ≤2 h; FIX:C for ≤4 h both at 4°C and 25°C; and APTT for ≤12 h at 4°C and ≤8 h at 25°C.
Department of Laboratory Medicine, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.
Limin
L
Feng
Department of Laboratory Medicine, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.
Ying
Y
Zhao
Department of Laboratory Medicine, The First People's Hospital of Hangzhou, Hangzhou 310003, China.
Hongcan
H
Zhao
Department of Hospital Office, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.
Zhexin
Z
Shao
D000328:Adult; D000368:Aged; D001780:Blood Coagulation Tests; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010949:Plasma; D013048:Specimen Handling; D013696:Temperature; D055815:Young Adult