Specific resistance of Veress needles, disposable and reusable trocars is limiting CO2 gas flow performance in pelviscopy and laparoscopy

SummaryAn efficient insufflation technique is essential for laparoscopy. Up to now physicians have had to rely on their experience and intuition when putting together an insufflation system. Comparable, objective data about the insufflation properties of all insufflation components used has not been available. In this study, details of the insufflation properties of disposable and reusable Veress needles and trocars and Luer lock connectors and the particular meaning of flow resistance for function and efficiency of the entire insufflation system have been measured and compared. In an independent laboratory study, a computer-based data acquisition measurement model was developed. Specific pressure dependent flow and resistance curves of insufflation components from manufacturers such as Auto Suture, Dexide, Ethicon, HiTec, Olympus, Origin, Richard-Allan, Volzer, Wiest, Wolf and Storz were evaluated by measurement of physical parameters pressure, CO2 gas flow and resistance. Through the introduction of ref...