The shaft of the catheter is made of polyurethane. It is torsionally stiff, which enables proper orientation of the tip in the right atrium. Normally it is introduced through the right jugular or subclavian vein of the patient and is then advanced through the superior vena cava into the right atrium. Correct positioning in the right atrium is ensured through intracardiac ECG signal guidance.

The long-term stability of the measured results as well as the hemocompatibility of the catheter has been enhanced by applying a hydrophilic coating. It prevents biolayer formation and greatly reduces the coefficient of friction between the catheter and the vessel's wall thus eliminating tissue irritation and damage.