An Evaluation of Modern Pressure Recording Systems

An evaluation of the stability and accuracy of modern physiologic pressure measuring systems is reported with a brief review of some of the problems of catheter pressure recording. Evaluation of stability consisted of measuring the drift of the baseline and of the calibration factors of the gage and amplifier combination with time and temperature change. Evaluation of the accuracy of these pressure measuring systems consisted of determining their static accuracy, their dynamic accuracy, and the pressure errors introduced by catheter accelerations and bending.