Participant flow
blood loss, intraoperative blood transfusions, arrhythmia, anemia
BLOOD LOSS, RECRUITMENT, ARRHYTHMIA, ANEMIA
A total of 180 patients were randomized after recruitment from the gastrointestinal surgery department of our hospital. Among those subjects, 80 patients (29 patients in the C group, 26 patients in the S1 group, 25 patients in the S2 group) were excluded from the analysis. Eight subjects in the C group, 4 subjects in the S1 group, 2 subjects in the S2 group were excluded because their surgery was canceled after the randomized grouping, and 2 subjects in the C group, 5 subjects in the S1 group, and 5 subjects in the S2 group were disqualified for meeting exclusion criteria. In the C group, 9 patients failed to undergo follow-up due to logistic limitations during the COVID-19 period, 2 patients refused to sign informed consent for the study, 3 patients failed to undergo follow-up due to surgery time exceeding the inclusion criteria, 4 patients received intraoperative blood transfusions for blood loss greater than 500 ml, and 1 patient had an intraoperative severe arrhythmia. In the S1 group, 6 patients failed to undergo follow-up due to logistic limitations during the COVID-19 period, 3 patients refused to sign informed consent for the study, 3 patients failed to undergo follow-up due to surgery time exceeding the inclusion criteria, 2 patients received intraoperative blood transfusion for blood loss greater than 500 ml, 1 patient received a blood transfusion due to anemia before surgery, and 2 patients failed to achieve the value of preoperative SVV. In the S2 group, 8 patients failed to undergo follow-up due to logistic limitations during the COVID-19 period, 1 patient refused to sign informed consent for the study, 4 patients failed to undergo follow-up due to surgery time exceeding the inclusion criteria, and 5 patients failed to achieve the value of preoperative SVV and COP. Thus, 31 patients in the C group, 34 patients in the S1 group, and 35 patients in the S2 group were included in the final analysis as shown in Fig. Flow diagram of enrolled patients
Characteristics for predicted and actual samples
