Pressure sensor and tubing kit for monitoring blood pressure during medical contrast agent injection procedure

A pressure transducer assembly (226) and a disposable fluid circuit/ tubing kit (360,760) including the former for monitoring blood pressure during a medical contrast agent injection procedure are disclosed. The pressure sensor (21) is isolated from the relatively high pressures occurring during such procedures by a volume of a compressible medium, like air or other suitable gas. The volume fills a cavity (23) of the pressure transducer assembly, and is enclosed between a pressure transmission membrane (24) and the pressure sensor (21). The pressure transducer assembly is integrated into a fluid circuit such that the pressure transmission membrane is exposed to flow through the fluid circuit (22). The pressure transmission membrane (24) moves into contact with a floor (235) of a first part (23A) of the cavity once a certain threshold pressure is reached in order to protect the sensitive pressure sensor from excess pressure, and rebounds back out of contact with the floor when pressures subside below said threshold pressure.