Observation indicators
intraoperative blood loss
ADVERSE EVENTS, ADVERSE EVENT, INTRAOPERATIVE BLOOD LOSS
The operation time, intraoperative blood loss, postoperative drainage, VBL, HBL, blood transfusion rate, and adverse events were recorded in the two groups. APTT, PT, TT, FIB, PLT, RBC, HB, HCT, CRP, ESR on the 1st postoperative day; and RBC, HB, HCT, CRP, ESR on the 4th postoperative day were also recorded. Adverse events included poor postoperative wound healing and postoperative DVT.The measurement of intraoperative blood loss was as follows. It included the amount of drainage in the intraoperative drainage bottle minus the amount of saline used to flush the incision during the operation, plus the net added weight of the cotton used for hemostasis during the operation. The postoperative drainage was calculated as the total drainage volume in the postoperative drainage tubes. The calculation of HBL was obtained according to the literature method