A flexible tube with an inflatable balloon(s) and electrical component(s) [e.g., thermistor, fibreoptic bundle] at its distal tip designed to be introduced percutaneously into the venous system via a central vein, and advanced to the pulmonary artery, to measure/monitor haematological parameters [e.g., pulmonary arterial pressures (e.g., wedge), cardiac output, cardiac index, mixed venous oxygen saturation (SvO2)]; it might use thermal dilution techniques and in addition be intended for venous blood sampling. Also referred to as a Swan-Ganz catheter, it is typically used in conjunction with a parent device (e.g., blood pressure transducer) [not included]. This is a single-use device.