Comparison of effects of left paratracheal pressure and cricoid pressure during mask ventilation in obese patients
10.3760/cma.j.cn131073.20240517.01006
- VernacularTitle:肥胖患者面罩通气时左侧气管旁与环状软骨按压效果的比较
- Author:
Aimin FENG
1
;
Yingshuai QIAO
;
Zhen ZHANG
;
Xihua LU
Author Information
1. 郑州大学附属肿瘤医院（河南省肿瘤医院）麻醉与围术期医学科，郑州 450008
- Keywords:
Obesity;
Masks;
Trachea;
Cricoid cartilage
- From:
Chinese Journal of Anesthesiology
2024;44(10):1182-1185
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To compare the effects of left paratracheal pressure (LPP) and cricoid pressure (CP) during mask ventilation in obese patients.Methods:Sixty patients of either sex, aged 18-60 yr, with 28 kg/m 2≤body mass index<35 kg/m 2, of American Society of Anesthesiologists Physical Status classification Ⅰ or Ⅱ, scheduled for general anesthesia, were divided into 2 groups ( n=30 each) using a random number table method: LPP group and CP group. In LPP group, pressure was applied beside the trachea, above the clavicle towards the vertebral direction, while in CP group, pressure was applied downwards to the cricoid cartilage, with a force of pressure between 25-35 N. The spatial relationship between the esophagus, trachea, and cricoid cartilage, the presence of air shadows in the gastric antrum during mask ventilation, and the cross-sectional area (CSA) of the gastric antrum before and after mask ventilation as well as the airway pressure during mask ventilation were observed. Results:In both groups, the esophagus was located in the left of the trachea in the supraclavicular region. There were no statistically significant differences in the airway pressure during mask ventilation and the CSA of the gastric antrum prior to mask ventilation between the two groups ( P>0.05). Compared to LPP group, the proportion of patients with air shadows in the gastric antrum during mask ventilation was significantly increased, and the CSA of the gastric antrum was increased after mask ventilation in CP group ( P<0.05). Conclusions:Compared to CP, LPP can decrease the development of air entering the stomach during mask ventilation and reduce the CSA of the gastric antrum after mask ventilation in obese patients.
