THREE-DIMENSIONAL URETHRAL PRESSURE PROFILE

II Basic Consideration of the Catheter with Only One Eye and Comparison the Catheter with the Tip Transducer by Millar

Abstract

The hydrodynamic character of the newly designed catheter with only one eye around the circumference of the tip was examined, in comparison with the catheter with four eyes and the microtip transducer by Millar. The pressure error of catheters with one eye or four eyes was not less than 1.7cmH₂O when water is perfused, although the error became larger to about 5.0cmH₂O when 60% urografin was perfused.
The pressure recorded using the tip transducer was found to be easily affected by the diameter of the urethra, although the urethral pressure was stabilized independent of the urethral diameter, when the catheter with only eye was used to measure, perfusing saline at a rate of 2.0ml/min.