Chinese Journal Of Clinical Anatomy ›› 2015, Vol. 33 ›› Issue (3): 364-367.doi: 10.13418/j.issn.1001-165x.2015.03.029

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Ultrasound measurements of the amount of juice for prediction of the risk of occurrence of vomit during emergency surgery

CAO Biao 1,2,   LIAO Hua 1,   HUANG Yi-ran 2,   WANG Ken-chun 2,   CHEN Rui 2,   HAN Xiao-feng 2   

  1. 1.Department of Anatomy, Key Laboratory of Construction and Detection of Guangdong Province, Southern Medical University, Guangzhou 510515, China;  2. The 157 Hospital, General Hospital of Guangzhou Military Region, Guangzhou 510510, China
  • Received:2015-02-09 Online:2015-05-25 Published:2015-07-24

Abstract:

Objective   To explore the use of ultrasound in measuring antral cross-sectional area (CSA) and calculating the amount of gastric juice in non-traumatic conditions, for predicting the occurrence of vomiting.    Methods    Patients were placed in semi-recumbent position. An ultrasound system with an abdominal imaging mode and a transducer C60x /5-2MHz convex array probe was employed to scan the abdomen (xiphoid) around the sagittal plane. The left lobe of the liver and the abdominal aorta were used as the body markers.  The probe was rotated slightly clockwise or counterclockwise to obtain a clear picture of the gastric antrum. gastric antrum was measured for the maximal diameter (D1 and D2) in the ultrasound image in a sagittal and vertical direction, and  CSA was then calculated (CSA = π × D1 × D2/4). The amount of gastric juice was calculated based on Bouvet regression equation. All the patients were divided into three groups according to the amount of juice: A: gastric volume ≤0.4ml/kg; group B: 0.4ml/ kg < juice volume ≤0.8ml/kg; group C: gastric volume> 0.8 ml/kg.    Results    (1) The feasibility using ultrasound for measurement of antrum CSA was confirmed.  (2) A positive correlation between CSA and volume of gastric antrum could be found in ultrasound measurement before induction of anesthesia. (3) Ultrasound measurements of gastric antrum and CSA  in emergency surgery before induction of anesthesia can be used to determine the probability of peri-operative vomiting. (4) Gastric residual volume greater than 0.8ml/kg could be used as an indication of a high possibility of occurrence of peri-operative vomitting.   Conclusion   Ultrasound can be used for  measurement of antral cross-sectional area (CSA) and calculation of the amount of gastric juice; it is feasible to predict vomiting, and can be expected to be used in future emergency surgery.

Key words: Gastric juice volume, Vomiting, Ultrasound measurements, Emergency surgery