Answers to Case 1-3-6
1. In Fig. 1-3-6 there is severe and early detrusor overactivity with a Pdet around
100 cmH2O.
2. No, there is an early loss of compliance resulting in an overactive contraction.
3. The voiding phase shows a poor flow (<5 ml/s) and a voiding pressure of over
80 cmH O signifying severe obstruction.
4. This is idiopathic detrusor overactivity but is not intrinsic. This means that the
detrusor overactivity is most likely secondary to long-term outflow obstruction. It
is thought that this type of overactivity is secondary to irreversible changes in the
detrusor as a result of outfl ow obstruction. This might not be fully relieved by
outfl ow surgery e.g., TURP.