Figure 4.

Normal urodynamics tracing. The bladder slowly fills with no change in detrusor pressure thus exhibiting normal compliance. There are no uninhibited detrusor contractions noted prior to the full void attempt (after permission to urinate was given by the examiner) and thus no DO noted. The EMG shows recruitment leading up to the contraction thus maintaining continence and creating an adequate void pressure but it notably quiets at the peak detrusor pressure allowing an unobstructed coordinated void to completion. DO, detrusor overactivity; EMG, electromyography; Pdet, detrusor pressure; Pves, intravesical pressure; Pabd, abdominal pressure.