In vivo measurement of force in the ureter. I. Basics of a new measurement principle.
A new device for the simultaneous in vivo measurement of pressure and developed force in the ureter is introduced. The 5-French catheter was cystoscopically inserted into the ureters of 12 dogs under anesthesia. The forms of the peristaltic waves for pressure and force show considerable differences. A basal force analogous to the basal pressure is only rarely measurable. During the systole, the developed force describes the pure muscle contraction process. The results are dependent on the location of the probe. Our new method is able to give information about the extent to which a ureter possesses the capacity to effectively close its lumen. This function, which is so decisive in urinary transport, can be determined not only qualitatively but also quantitatively.
Pohl
J
J
Klinik und Poliklinik für Urologie, Westfälische Wilhelms-Universität Münster, FRG.
Dambacher
U
U
Marx
G
G
D000818:Animals; D002404:Catheterization / Q000295:instrumentation / Q000379:methods; D004285:Dogs; D005260:Female; D009119:Muscle Contraction; D011312:Pressure; D014513:Ureter / Q000502:physiology*; D014563:Urodynamics