title: Low vs Standard Pressures in Gynecologic Laparoscopy: a Systematic Review.
abstract: BACKGROUND
  The optimal intraperitoneal pressure during laparoscopy is not known. Recent literature found benefits of using lower pressures, but the safety of doing abdominal surgery with low peritoneal pressures needs to be assessed. This systematic review compares low with standard pneumoperitoneum during gynecologic laparoscopy.
  
  
  METHODS
  We searched Medline, Embase, and the Cochrane Library for randomized controlled trials comparing intraperitoneal pressures during gynecologic laparoscopy. Two authors reviewed references and extracted data from included trials. Risk ratios, mean differences, and standard mean differences were calculated and pooled using RevMan5. Of 2251 studies identified, three were included in the systematic review, for a total of 238 patients. We found a statistically significant but modest diminution in postoperative pain of 0.38 standardized unit based on an original 10-point scale (95% confidence interval [CI], -0.67 to -0.08) during the immediate postoperative period when using low intraperitoneal pressure of 8 mm Hg compared with ≥ 12 mm Hg and of 0.50 (95% CI, -0.80 to -0.21) 24 hours after the surgery. Lower pressures were associated with worse visualization of the surgical field (risk ratio, 10.31; 95% CI, 1.29-82.38). We found no difference between groups over blood loss, duration of surgery, hospital length of stay, or the need for increased pressure.
  
  
  CONCLUSIONS
  Low intraperitoneal pressures during gynecologic laparoscopy cannot be recommended on the behalf of this review because improvement in pain scores is minimal and visualization of the surgical field is affected. The safety of this intervention as well as cost-effectiveness considerations need to be further studied.
authors.affiliation: CHU de Québec - Université Laval Research Center (CHUL), Québec, QC, Canada.
authors.forename: Esther B
authors.initials: EB
authors.lastname: Kyle
authors.affiliation: CHU de Québec - Université Laval Research Center (CHUL), Québec, QC, Canada.
authors.forename: Sarah
authors.initials: S
authors.lastname: Maheux-Lacroix
authors.affiliation: CHU de Québec - Université Laval Research Center (CHUL), Québec, QC, Canada.
authors.forename: Amélie
authors.initials: A
authors.lastname: Boutin
authors.affiliation: CHU de Québec - Université Laval Research Center (CHUL), Québec, QC, Canada.
authors.forename: Philippe Y
authors.initials: PY
authors.lastname: Laberge
authors.affiliation: CHU de Québec - Université Laval Research Center (CHUL), Québec, QC, Canada.
authors.forename: Madeleine
authors.initials: M
authors.lastname: Lemyre
mesh_terms: D005260:Female; D013509:Gynecologic Surgical Procedures / Q000379:methods*; D006801:Humans; D007327:Insufflation / Q000379:methods*; D010535:Laparoscopy / Q000379:methods*; D010149:Postoperative Pain / Q000517:prevention & control*; D011312:Pressure
keywords: Artificial pneumoperitoneum; Gynecology; Laparoscopy; Pain; Safety