Objective:To evaluate the effect of medical compression elastic stockings or intermittent pneumatic pressure pumps on intraoperative hemodynamics in patients in the lithotomy position under general anesthesia.Methods:A total of 100 patients, aged 30-59 yr, of American Society of Anesthesiologists physical status Ⅰ or Ⅱ, scheduled for elective colorectal surgery or gynecological surgery in the lithotomy position under general anesthesia, with expected operation time>60 min, were divided into 2 groups ( n=50 each) using a random number table method: pressure pump group (group PP) and elastic stocking group (group ES). After entering the operating room (T 0), immediately after anesthesia induction (T 1), at 5 and 30 min of the lithotomy position (T 2, 3) and at the end of surgery (T 4), systolic and diastolic blood pressure (SBP, DBP) and heart rate (HR) were measured, and the requirement for vasoactive agents was recorded. Results:Compared with the values at T 0, SBP was significantly decreased at T 1-3 in group PP and at T 1 in group ES ( P<0.05). Compared with group PP, SBP was significantly increased at T 2, 3 in group ES ( P<0.05), no significant change was found DBP and HR at each time point ( P>0.05), and the intraoperative consumption of ephedrine was reduced ([16±9]mg vs.[8±5]mg, P<0.05). Conclusion:Medical compression elastic stockings produces less interference in intraoperative hemodynamics in patients in the lithotomy position under general anesthesia, and its safety is better than intermittent pneumatic pressure pumps.

The adjacent anatomy of the pelvis is complicated, with digestive, urinary, reproductive and other organs as well as important blood vessels and nerves. Therefore, accurate resection of pelvic tumors and precise reconstruction of defects after resection are extremely difficult. The development of medical 3D printing technology provides new ideas for precise resection and personalized reconstruction of pelvic tumors. The “triune” application of 3D printing personalized lesion model, osteotomy guide plate and reconstruction prosthesis in pelvic tumor limb salvage reconstruction treatment has achieved good clinical results. However, the current lack of normative guidance standards such as preparation and application of 3D printing personalized lesion model, osteotomy guide plate and reconstruction prosthesis restricts its promotion and application. The formulation of this consensus provides normative guidance for 3D printing personalized pelvic tumor limb salvage reconstruction treatment.