Abstract :
Poiseuilles equation is used to measure the bladder pressure, for healthy persons (not prostatics), instead of insertion a catheter (indirect method) or by direct method in which a needle is inserted through the wall of the abdomen directly into the bladder.(l) The present study, poiseuilles law is used to measure bladder pressure and to determine the relationship between the volume, volume rate and pressure for twenty five volunteers in the range of 18-25 years by using this equation .
