title: Intra-abdominal pressure measurement using a modified nasogastric tube: description and validation of a new technique.
abstract: OBJECTIVE
  This study assessed the accuracy of an intragastric method of measuring intra-abdominal pressure (IAP).
  
  
  METHODS
  Prospective sequential study with simultaneous paired measurement of gastric and urinary bladder pressures.
  
  
  METHODS
  Operating theatre, University Teaching Hospital.
  
  
  METHODS
  9 patients undergoing laparoscopic cholecystectomy were studied.
  
  
  METHODS
  Intraperitoneal pressures were monitored during peritoneal insufflation at laparoscopy up to a pressure of 20 mmHg.
  
  
  RESULTS
  Intra-abdominal pressure measurements were recorded simultaneously using a gastric balloon and urinary catheter. Gastric pressure may be up to 4 mmHg higher or 3 mmHg lower than urinary bladder pressure.
  
  
  CONCLUSIONS
  Intra-abdominal pressure can be measured easily in this new fashion, allowing a continuous pressure trend to be obtained without interfering with urinary output estimation.
authors.affiliation: Department of Surgery, Liverpool Hospital, Sydney, Australia.
authors.forename: M
authors.initials: M
authors.lastname: Sugrue
authors.forename: M D
authors.initials: MD
authors.lastname: Buist
authors.forename: A
authors.initials: A
authors.lastname: Lee
authors.forename: D J
authors.initials: DJ
authors.lastname: Sanchez
authors.forename: K M
authors.initials: KM
authors.lastname: Hillman
mesh_terms: D000005:Abdomen / Q000502:physiology*; D000328:Adult; D000368:Aged; D002404:Catheterization / Q000295:instrumentation; D005260:Female; D006801:Humans; D007441:Intubation, Gastrointestinal / Q000295:instrumentation*; D008297:Male; D008365:Manometry / Q000295:instrumentation*; D008875:Middle Aged; D011312:Pressure; D011446:Prospective Studies; D015203:Reproducibility of Results; D013270:Stomach / Q000502:physiology; D001743:Urinary Bladder / Q000502:physiology; D014546:Urinary Catheterization / Q000295:instrumentation