<prompt> Most common and best gas for laparoscopy:CO2N2AirO2  <response>: Ans: a CO2 Ref:Bailey, 24th ed,p. 107CO is the gas used to create pneumoperitoneumMethods for creating pneumoperitoneum-Open- more cumbersome, but more efficientClosed- blind punctureIt was desirable that intraabdominal pressure should be between 12-14 mm Hg and should never be allowed to exceed 20 mm Hg.- Ajay Yadav, p. 168. 