<prompt> All of the following are true about laparoscopy except:Veress needle is used in closed methodIntra-abdominal pressure maintained during laparoscopy is 12-15 mm HgMost commonly used gas is CO2Flow of gas is 2 Lmin  <response>: LAPAROSCOPY: - Needle used for pneumoperitoneum: Veress needle - Most commonly used gas: CO2 - Flow of gas: 1Lmin - Intra-abdominal pressure maintained during laparoscopy:12-15mm Hg - Trocar is inseed at or just below the umbilicus penetrating skin, superficial deep fascia, fascia transversalis parietal peritoneum - Post-laparoscopy shoulder pain is due to CO2 ,retention causing irritation of diaphragm referred pain to the shoulder through phrenic nerve. Needle used in pneumoperitoneum: Closed method: Veress needle Open method: Hasson technique 