Objective: To investigate the effect of 300 mL carbohydrates intake two hours before sur-gery on the gastric volume (GV) in patients positioning in trendelenburg undergoing gynecological laparoscopic procedures by using gastric antrum sonography, and further assess the risk of reflux aspiration.
Methods: From June 2020 to February 2021, a total of 80 patients, aged 18-65 years, body mass index (BMI) 18-35 kg/m2, falling into American Society of Anesthesiologists (ASA) physical status Ⅰ or Ⅱ, scheduled for gynecological laparoscopic procedures positioning in trendelenburg were recruited and divided into two groups: the observation group (n =40) and the control group (n=40). In the observation group, solid food was restricted after 24:00, the patients were required to take 300 mL carbohydrates two hours before surgery. In the control group, solid food and liquid intake were restricted after 24:00 the night before surgery. The cross-sectional area (CSA) of gastric antrum was measured in supine position and right lateral decubitus position before anesthesia. Primary outcome was gastric volume (GV) in each group. Secondary outcome included Perlas A semi-quantitative grading and gastric volume/weight (GV/W). All the patients received assessment of preoperative feeling of thirsty and hunger with visual analogue scale (VAS).
Results: Complete data were available in eighty patients. GV was (58.8±23.6) mL in the intervention group vs. (56.3±22.1) mL in the control group, GV/W was (0.97±0.39) mL/kg vs. (0.95±0.35) mL/kg, respectively; all the above showed no significant difference between the two groups (P > 0.05). Perlas A semi-quantitative grading showed 0 in 24 patients (60%), 1 in 15 patients (37.5%), 2 in 1 patient (2.5%) in the intervention group and 0 in 25 (62.5%), 1 in 13 (32.5%), 2 in 2 (5%) in the control group, the proportion of Perlas A semi-quantitative grading showed no significant difference between the two groups (P > 0.05). A total of 3 patients (1 in the intervention group and 2 in the control group) with Perlas A semi-quantitative grading 2 were treated with special intervention, no aspiration case was observed in this study. The observation group endured less thirst and hunger (P＜0.05).
Conclusion: Three hundred mL carbohydrates intake two hours before surgery along with ultrasound guided gastric content monitoring does not increase gastric volume and the risk of reflux aspiration in patients positioning in trendelenburg undergoing gynecological laparoscopic surgery, and is helpful in minimizing disturbance to the patient's physiological needs, therefore leading to better clinical outcome.
目的: 麻醉前超声测量胃窦部横截面积(cross-sectional area, CSA), 观察术前2 h口服碳水化合物300 mL对妇科腹腔镜手术特殊头低臀高仰卧截石体位患者麻醉前胃容量(gastric volume, GV)的影响, 并评估患者发生反流误吸的风险。
方法: 选择2020年6月至2021年2月在北京大学国际医院择期行妇科腹腔镜手术特殊头低臀高仰卧截石体位患者80例, 年龄18~65岁, 体重指数18~35 kg/m2, 美国麻醉医师学会(American Society of Anesthesiologists, ASA)分级Ⅰ或Ⅱ级。采用随机数字表法将患者随机分为干预组和对照组, 每组40例。干预组患者手术前一日24:00后禁食, 对于首台手术患者, 手术日5:30口服碳水化合物300 mL; 对于接台手术患者在预计手术开始前2 h口服碳水化合物300 mL。对照组患者于手术前一日24:00后常规禁食禁饮。麻醉前分别在仰卧位和右侧卧位下行胃窦部超声检查。记录仰卧位和右侧卧位下CSA, 计算出两组患者麻醉前GV, 使用Perlas A半定量评级及胃容量/体质量(gastric volume/weight, GV/W)评估患者发生反流误吸的风险, 记录术前口渴感、饥饿感视觉模拟评分(visual analogue scale, VAS)等。
结果: 两组共80例患者均完成胃窦部超声评估及测量, 干预组和对照组麻醉前GV分别为(58.8±23.6) mL和(56.3±22.1) mL, GV/W分别为(0.97±0.39) mL/kg和(0.95±0.35) mL/kg, 上述指标两组间差异均无统计学意义(P＞0.05)。Perlas A半定量评级: 干预组0级24例(60%), 1级15例(37.5%), 2级1例(2.5%); 对照组0级25例(62.5%), 1级13例(32.5%), 2级2例(5%), 两组评级构成比差异无统计学意义(P＞0.05)。两组共3例(干预组1例, 对照组2例)Perlas A半定量评级为2级的患者, 经干预, 均未发生反流误吸。与对照组比较, 干预组术前口渴感、饥饿感VAS明显降低(P＜0.05)。
结论: 妇科腹腔镜手术特殊头低臀高仰卧截石体位患者术前2 h口服300 mL碳水化合物, 麻醉前胃容量未见增加, 反流误吸风险未见增加, 对患者生理需求的干扰减少, 患者舒适度增加。
Keywords: Enhanced recovery surgery; Fasting; Gastric ultrasonography; Gastric volume; Trendelenburg position.