A catheter-manometer calibrator--a new clinical instrument

Although catheter-manometer systems are widely used in clinical medicine, little effert has been make to evaluate the accuracy of these systems. There is consequently a need for an acceptable method of evaluating the complete pressure recording system under clinical conditions, i.e. a catheter-transducer system that be put together and kept sterilised during the preparation of the patient and applied promptly after static and dynamic calibration of pressure under sterile conditions is described. All kinds of catheters, connectors, transducers, as well as the effect of different fluids or air bubbles on the measuring system, can be investigated. The value of the instrument, especially in clinical practice, is demonstrated and discussed.