According to one embodiment, a system for supplying insufflation fluid includes a trocar (14) having a primary pressure sensor (22) in or on the trocar (14) which is positioned into a patient cavity (20). The system is configured for supplying an insufflation fluid to the patient cavity (20) and measuring a pressure in the patient cavity (20) by the primary pressure sensor (22). The system is further configured for controlling the supply of insufflation fluid by an insufflator (10) to the patient cavity (20) based at least on the measured pressure and determining by a processor associated with the insufflator (10) that the measured pressure may be inaccurate and in response, controlling, by the insufflator (10), the supply of insufflation fluid to the patient cavity (20) based at least on a pressure measured by a backup pressure sensor (26) rather than based on the measured pressure.
