|Normal urethral function is defined as a urethra that opens, and is continuously relaxed to allow the bladder to be emptied at a normal pressure (Abrams et al. 2002).
|Detrusor sphincter dyssynergia is defined as detrusor contraction concurrent with an involuntary contraction of the urethral and/or periurethral striated muscle. Occasionally flow may be prevented altogether (Abrams et al. 2002).