<qa>  What is the AirSeal valveless trocar system?The AirSeal valveless trocar system reduces CO2 absorption when compared to standard trocars during renal laparoscopy. Also, use of this trocar system provides a more stable intra-abdominal pressure when compared to standard trocars, a feature that could possibly allow for laparoscopic surgery to be performed at lower intra-abdominal pressures. 