Effect of peak inspiratory pressure on the gastric insufflation is evaluated using ultrasonography during face mask ventilation in obese adults. Effect of facial mask holding techniques on the gastric insufflation is also evaluated.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
78
Presence of air insufflation is assessed using ultrasound in the upper esophageal region and stomach during face mask ventilation
Presence of gastric insufflation in the epigastric region
Under ultrasound, air signal is assessed in the epigastric region
Time frame: During anesthesia induction
Cross-sectional area of the antral cross-sectional area
During ultrasound examination, anterior-posterior diameter and cranio-caudal diameter of the antrum are measured. Cross-sectional area of the gastric antrum is calculated as follows; (AP × CC × π)/4 (AP=antero-posterior diameter and CC=cranio-caudal diameter).
Time frame: During anesthesia induction
Presence of gastric insufflation in the upper esophageal region
Under ultrasound, air signal is assessed in the upper esophageal region.
Time frame: During anesthesia induction
Expiratory tidal volume
Expiratory tidal volumes displayed on the monitor of the anesthesia machine are recorded.
Time frame: During anesthesia induction
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