TY - JOUR
T1 - A clinical study comparing ultrasound-measured pyloric antrum cross-sectional area to computed tomography-measured gastric content volume to detect high-risk stomach in supine patients undergoing emergency abdominal surgery
AU - Okada, Yoshifumi
AU - Toyama, Hiroaki
AU - Kamata, Kenji
AU - Yamauchi, Masanori
PY - 2020/10/1
Y1 - 2020/10/1
N2 - The main aim of this study was to assess whether the ultrasound examination and measurement of the pyloric antral cross-sectional area (antral-CSA) in the supine position could be useful to diagnose a full stomach using a computed tomography (CT) as a comparator in emergency patients. Immediately before general anesthesia induction in patients undergoing emergency abdominal surgery, antral-CSA was measured and the volume of the gastric contents was evaluated via ultrasound in the supine position. Gastric content volume was also calculated from a CT image taken prior to the operation. The primary outcome of this study was to determine the antral-CSA threshold of the “high-risk stomach” defined as the presence of solid/thick fluid and/or gastric content volume > 1.5 mL/kg. The secondary outcome was to evaluate the correlation between gastric content volume calculated by CT and antral-CSA. Thirty-nine patients provided consent and were included. Ten patients had gastric contents over 1.5 mL/kg, and 18 patients showed solid contents/thick fluids. The median [IQR] antral-CSA and gastric content volume were 3.82 [2.74–5.07] cm2 and 0.32 [0.09–2.08] mL/kg, respectively. The antral-CSA cutoff value of “high-risk stomach” was 3.01 cm2. This value had a sensitivity of 85%, a negative predictive value of 53%, and AUC of the ROC of 0.670 (p = 0.03). The Spearman rank-order correlation between both measures was 0.420 (p = 0.01). The correlation was improved, particularly in stomachs with solid contents/thick fluids. Antral-CSA measured in the supine position may help to assess the high-risk stomach patients undergoing emergency surgery. Trial registration:www.umin.ac.jp (UMIN 000013416). Registered 14 March 2014.
AB - The main aim of this study was to assess whether the ultrasound examination and measurement of the pyloric antral cross-sectional area (antral-CSA) in the supine position could be useful to diagnose a full stomach using a computed tomography (CT) as a comparator in emergency patients. Immediately before general anesthesia induction in patients undergoing emergency abdominal surgery, antral-CSA was measured and the volume of the gastric contents was evaluated via ultrasound in the supine position. Gastric content volume was also calculated from a CT image taken prior to the operation. The primary outcome of this study was to determine the antral-CSA threshold of the “high-risk stomach” defined as the presence of solid/thick fluid and/or gastric content volume > 1.5 mL/kg. The secondary outcome was to evaluate the correlation between gastric content volume calculated by CT and antral-CSA. Thirty-nine patients provided consent and were included. Ten patients had gastric contents over 1.5 mL/kg, and 18 patients showed solid contents/thick fluids. The median [IQR] antral-CSA and gastric content volume were 3.82 [2.74–5.07] cm2 and 0.32 [0.09–2.08] mL/kg, respectively. The antral-CSA cutoff value of “high-risk stomach” was 3.01 cm2. This value had a sensitivity of 85%, a negative predictive value of 53%, and AUC of the ROC of 0.670 (p = 0.03). The Spearman rank-order correlation between both measures was 0.420 (p = 0.01). The correlation was improved, particularly in stomachs with solid contents/thick fluids. Antral-CSA measured in the supine position may help to assess the high-risk stomach patients undergoing emergency surgery. Trial registration:www.umin.ac.jp (UMIN 000013416). Registered 14 March 2014.
KW - Cross-sectional area
KW - Gastric contents
KW - Pyloric antrum
KW - Ultrasound
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U2 - 10.1007/s10877-019-00438-1
DO - 10.1007/s10877-019-00438-1
M3 - Article
C2 - 31813111
AN - SCOPUS:85076164556
VL - 34
SP - 875
EP - 881
JO - Journal of Clinical Monitoring and Computing
JF - Journal of Clinical Monitoring and Computing
SN - 1387-1307
IS - 5
ER -