[Clinical data obtained through coagulation testing suggests that hypothermia exerts influence on a patient's blood coagulation reaction].

It often takes longer to achieve hemostasis when performing an operation on a patient in cerebral hypothermia therapy than in a normal patient, despite the lack of abnormal clinical blood coagulation findings, and this study was conducted to investigate the cause of delays in coagulation in patients with hypothermia. In this study, 93 samples of plasma were collected at our center from 10 patients(7 men and 3 women; mean age, 33.7) who were in cerebral hypothermia therapy with a urinary bladder temperature maintained at 32-34 degrees C. Each sample was divided into two, and PT(prothrombin time) and APTT(activated partial thromboplastin time) were measured at the normal analysis temperature of 37 degrees C in one sample, and at the hypothermia temperature of 32-34 degrees C in the other sample. The results showed that PT and APTT tended to shorter at 37 degrees C, than those measured at 32-34 degrees C. Thus, we suggest that it is necessary to regulate the temperature of patients with accidental hypothermia or in whom hypothermia therapy is performed.