Each set of measurements of intraabdominal pressure included intra bladder and intragastric pressure in the supine position followed by the semi-recumbent position at head of bed 30. All four measurements were taken over a period of 5 to 10 min or less to reduce the possibility of changes in intraabdominal pressure over time. Three sets of readings were taken at least 4 h apart over a 24-h period.
Age
18–60
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
older than 18 years of age. to be sedated mechanically ventilated and to have both a nasogastric tube and indwelling urine catheter in place
You may not be if
recent oesophageal, gastric or bladder surgery; patients who were moribund and unlikely to survive 24 h; patients who were pregnant and patients who were unable to lay flat for any reason.
