Viscoelastic properties of bladder wall strips.

Ninety-five stress-decrease curves of dog bladder strips, selected from 204 experimentally determined curves, were analyzed in terms of a model which can be described by an equation containing two or three exponential terms and a constant. As might be expected, the three-exponential equation gave the better fit. The results are discussed and compared with those derived from measurements on whole bladders. The relaxation constants determined for bladder strips agree remarkably well with those for whole bladders, indicating that the value of these constants is independent of geometry.