| Objective:The purpose of this study is to make a prospective comparison between the gastric volume range of the elderly full-term pregnant patients and the non-pregnant patients,so as to determine whether the elderly full-term pregnant women have a higher risk of aspiration,and to explore the application of the new fasting and drinking prohibition guidelines in this special population,such as pregnant women.Method:In this study,135 women who planned to perform elective surgery from January 2019 to January 2020 were selected.Due to the partial loss of data,61 elderly and full-term pregnant patients and 60 non-pregnant women were finally included.The method: after the patient entered the anesthesia preparation room,an anesthesiologist who had 75 times of ultrasound examination experience for pregnant women and non-pregnant women performed ultrasound examination for half an hour to one hour before cesarean section.The subjects first used the supine position,and then used the right lying position(RLD)to scan the gastric antrum in order to evaluate the stomach capacity of the patient qualitatively and semi quantitatively,and measured the supine position and the right lying position The head and tail diameter AP and the anterior and posterior diameter cc of the lower gastric antrum were calculated by the formula,and the corresponding gastric capacity was calculated by the gastric antrum CSA.We used descriptive statistics: median to describe the trend of concentration,interquartile to evaluate dispersion,and upper limit to express 95 th percentile.Result:In this study,61 full-term pregnant women and 60 non-pregnant women were included and studied.There was no significant difference between the two groups in the calculated gastric volume and the range of gastric volume per body weight.The 95% confidence interval of gastric volume in the two groups was estimated: 67.1(63.1-71.0)ml in the elderly group and 87.3(80.9-93.6)ml in the non-pregnant group.The gastric volume per body weight was 1.0(0.9-1.1)ml / kg in the elderly women group and 1.5(1.4-1.6)ml / kg in the non-pregnant women group.Gastric volume was negatively correlated with age,positively correlated with body weight and BMI,but not with fasting solids,fluid time and pregnancy time.Perlas classification was not significantly correlated with the general characteristics of patients and the incidence rate of gestational diabetes mellitus,but Perlas classification was positively correlated with CSA and gastric volume of gastric antrum,and the correlation coefficient was 0.73.Conclusion:There was no significant difference in the basic gastric volume between the elderly full-term pregnant women and the non-pregnant women.This study will help us to understand the results of gastric ultrasonography in elderly women and make a more reasonable fasting and drinking time for this special group. |
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