Figure 2.

A urodynamic study of a 91-year-old woman with mixed urgency and stress continence. (a) The urodynamic curves show DO with weak detrusor contractions, accompanied by increased EMG activity (she tries to hold on voluntarily when urgency occurs), at maximum cystometric bladder capacity only a minor increase of detrusor pressure, and voiding by abdominal straining. (b) On blocking the bladder neck with the inflated balloon of the urodynamic catheter, there is a good detrusor contraction with a detrusor pressure amplitude of 50 cm H₂O, indicating that with increased outlet resistance (e.g. after sling implantation), a detrusor contraction can occur.