Effects of spinal anaesthesia and intravenous general anaesthesia on the absorption of normal salinein patients undergoing hysteroscopic endometrial resection: an observational study

INTRODUCTION: The absorption of uterine distention fluid during hysteroscopic endometrial resection can cause volumeoverload, which can lead to coagulation dysfunction, acute left heart failure and pulmonary oedema in patients. The effects of spinal anaesthesia and intravenous general anaesthesia on the absorption of normal saline as uterine distention fluid during hysteroscopic surgery remain unclear. The aim of this clinical trial was toobserve the effects of spinal anaesthesia and intravenous general anaesthesia on the absorption of normal saline in patients undergoing hysteroscopic endometrial resection. METHODS: A total of 126 patients undergoing elective hysteroscopic endometrial resection were divided into a spinal anaesthesia group (s group) and a propofol-fentanyl intravenous anaesthesia group (PF group), with 63 cases in each group, and both groups were divided into a short-term group (S(1) group and PF(1) group) and a long-term group (S(2) group and PF(2) group) according to the operation time. The primary outcome was the absorption of normal saline, and the secondary outcomes included the perioperative SBP, DBP, HR and SpO(2) and postoperative haematocrit values, and the incidence of postoperative complications. RESULTS: The volume of saline absorbed was significantly increased in the S(2) and PF(2) groups compared with the S(1) and PF(1) groups (P < 0.001). There was a significant positive correlation between the amount of normal saline absorbed and the operation time (r = 0.895, P < 0.001). The postoperative haematocrit value was slightly lower than that before the operation in all four groups (P < 0.05), and there were no differences in the incidences of urinary retention, sinus bradycardia or hypotension between groups (P > 0.05). CONCLUSIONS: There was no difference in the effects of spinal anaesthesia and intravenous general anaesthesia on the absorption of normal saline during hysteroscopic endometrial resection, and the absorption of normal saline increased accordingly with the extension of operation time.