Evaluation of hemostatic abnormalities in patients who underwent major hepatobiliary pancreatic surgery using activated partial thromboplastin time-clot waveform analysis.

INTRODUCTION:Bleeding after major hepatobiliary pancreatic (HBP) surgery may be serious. Although postoperative abnormality of the hemostatic system are important elements that affect bleeding, routine activated partial thromboplastin time (APTT) assessment is considered inadequate to predict massive bleeding (MB). Recently, APTT-clot waveform analysis (CWA) was reported to be useful for detecting coagulation disorders. METHODS:APTT-CWA was performed using the ACL-TOP analyzer in 188 patients who underwent four major HBP surgeries (distal pancreatectomy, hepatectomy, subtotal stomach-preserving pancreatoduodenectomy (SSPPD), and SSPPD with combined resection and reconstruction of the portal vein) to analyze its usefulness in predicting the risk of bleeding. RESULTS:Seventy (37.2%) patients developed MB and the incidence of MB was highest among patients who underwent hepatectomy. There were no significant differences in routine APTT, the first derivative peak (DP) time and 1/2 fibrin formation peak time between patients with MB and those without MB, throughout the postoperative course. On the other hand, the first and second DP heights were significantly lower in patients with MB than in those without MB and lowest in patients who underwent hepatectomy. CONCLUSION:APTT-CWA was able to detect the detailed changes in the hemostatic system after major HBP surgery. The patterns of APTT-CWA after major HBP surgery differed among various surgical procedures according to invasiveness. The lower first and the second DP height, which were frequently observed in hepatectomy patients, may be useful for predicting the risk of MB.