The increase in complexity of urinary incontinence diagnosis exams demands a careful needs evaluation, taking into account the risks/benefits for each patient.
An objective and quantitative evaluation of urinary incontinence is important for both the initial evaluation and the evaluation of treatment effects.
The levator ani muscle has many functions. It is important in the control of evacuation, micturition, abdominal support, and in female sexual performance. Its disorders may cause urinary and fecal incontinence, difficulties in perineal relaxation during labor, enterocele, and anorgasmia 1.
The pubococcygeus muscle is composed of slow and rapid contraction fibers and is innervated by the pudendal nerve2. We can also conclude that the detrusor nucleus in the sacral micturition centre is directly inhibited by the contraction of this muscle also called the perineum-detrusor inhibitor reflex3.
Pelvic floor muscle evaluation can be performed visually, by palpation, or by objective evaluation using a perineometer.
Different types of equipment are used for objective evaluation for muscle strength measurement. KEGEL (1948) was the first to describe equipment for this; an endovaginal probe and a manometer, allowing the detection of intravaginal pressure elevation as a result of supported pelvic floor muscle contraction. This method can determine peak, mean muscular contraction, and supported contraction time4.