This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Robotics, Laparoscopy and Bariatric Surgery, Subject name: Surgery
[{'content': 'All of the following are true about laparoscopy except: \nSelect and explain. \nA. Veress needle is used in closed method, B. Intra-abdominal pressure maintained during laparoscopy is 12-15 mm Hg, C. Most commonly used gas is CO2, D. Flow of gas is 2 L/min', 'role': 'user'}, {'content': 'Answer: D \nExplanation: LAPAROSCOPY: - Needle used for pneumoperitoneum: Veress needle - Most commonly used gas: CO2 - Flow of gas: 1L/min - 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', 'role': 'assistant'}]