Bladder emptying flow rate as a function of bladder volume.

The recent introduction of radioisotopic technique to measure bladder emptying flow rate&` has prompted a resurgence of interest in the topic. Since no comprehensive description of bladder emptying flow rate (as a function of bladder volume) has been discussed in the literature, we present such an approach in this communication. The topic is of general interest since radioisotopic methods provide a means for estimating bladder function without the dangers inherent in catheterization. Further, an empirical understanding of the normal dynamics of micturation is helpful in understanding the altered dynamics occurring in bladder diseases. The present discussion, limited to the normal bladder, will hopefully be followed by studies on patients with specific urologic problems.