title: True incidence and clinical significance of pneumoperitoneum after PEG placement: a prospective study.
abstract: BACKGROUND
  PEG is a widely used method for providing nutritional support. Although pneumoperitoneum is a known finding after PEG placement, its true incidence is subject to debate. Small retrospective studies have found varied rates of free air after PEG placement.
  
  
  METHODS
  There were a total of 65 patients.
  
  
  OBJECTIVE
  To assess the true incidence of pneumoperitoneum and its clinical significance.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Long Island Jewish Medical Center.
  
  
  METHODS
  We obtained upright and anterior-posterior chest radiographs of 65 patients within 3 hours after PEG placement. Type of PEG tube, gauge of the needle used, number of sticks, and indications were recorded. The presence of pneumoperitoneum on the initial chest film was considered to be a positive finding. After a positive result, a repeat chest film was obtained 72 hours later to determine whether there was progression or resolution of the free air. Patients enrolled in the study were also monitored clinically for evidence of peritonitis.
  
  
  RESULTS
  Of the 65 patients who underwent PEG placement, 13 developed a pneumoperitoneum on the initial chest radiograph; there was complete resolution of pneumoperitoneum at 72 hours in 10 of the 13 patients. In 3 patients, the free air persisted but was of no clinical significance.
  
  
  METHODS
  The free air was quantified by measuring the height of the air column under the diaphragm and was graded with a scoring system (0, no air; 1, small; 2, moderate; 3, large).
  
  
  RESULTS
  Eleven patients who underwent PEG died during the hospitalization; none of the deaths were related to the PEG placement or pneumoperitoneum. The other 54 patients were discharged to a skilled nursing facility. No patients in the study had clinical evidence of peritonitis. There were no adverse events, ie, infection or bleeding, associated with the PEG placement in any of the patients.
  
  
  CONCLUSIONS
  Our data suggest that pneumoperitoneum after PEG placement is common and, in the absence of clinical symptoms, is of no clinical significance and does not warrant any further intervention.
authors.affiliation: Division of Gastroenterology, Department of Medicine, Long Island Jewish Hospital, New Hyde Park, New York, USA.
authors.forename: Ari J
authors.initials: AJ
authors.lastname: Wiesen
authors.forename: Kostas
authors.initials: K
authors.lastname: Sideridis
authors.forename: Angelo
authors.initials: A
authors.lastname: Fernandes
authors.forename: Jonathan
authors.initials: J
authors.lastname: Hines
authors.forename: Anant
authors.initials: A
authors.lastname: Indaram
authors.forename: Lenny
authors.initials: L
authors.lastname: Weinstein
authors.forename: Samuel
authors.initials: S
authors.lastname: Davidoff
authors.forename: Simmy
authors.initials: S
authors.lastname: Bank
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D005773:Gastroscopy; D005774:Gastrostomy / Q000009:adverse effects* / Q000379:methods*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009518:New York / Q000453:epidemiology; D011027:Pneumoperitoneum / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000209:etiology*; D011379:Prognosis; D011446:Prospective Studies; D012307:Risk Factors; D014057:Tomography, X-Ray Computed