Value of bedside ultrasound-measured antral cross-sectional area in diagnosing an empty stomach in patients with chronic hepatitis B / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the value of bedside ultrasound-measured antral cross-sectional area (CSA) in diagnosing an empty stomach in patients with chronic hepatitis B.Methods One hundred and fifty-nine patients with chronic hepatitis B,aged 18-64 yr,with body height＞150 cm,weighing 45-110 kg,were enrolled in this study.The antero-posterior diameter and craniocaudal diameter of the gastric antrumn were measured by bedside ultrasound when patients were in the supine position,and CSA was calculated.Gastroscope negative pressure was used to suction fluid from stomach at the end of gastroscopy,and the fluid volume was recorded,and gastric fluid volume ≤0.8 ml/kg was defined as the standard for empty stomach.Results The cut-off value of CSA measured by bedside ultrasound in diagnosing an empty stomach was 440 mm2,with sensitivity 85.07％,specificity 80.95％,positive predictive value 96.61％,negative predictive value 45.95％,coincidence rate 84.52％.Conclusion The cut-off value of bedside ultrasound-measured CSA in diagnosing an empty stomach is 440 mm2 for the patients with chronic hepatitis B.