Pudendal Nerve Stimulation
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|In the diagnosis of micturition and pelvic floor disorders, common anorectal, pelvic floor and urodynamic investigations are combined with studies to investigate neurological abnormalities. Neurological studies can greatly improve the quality of the diagnosis.
Pudendal Nerve Stimulation (PNS) or Pudendal Nerve Terminal Motor Latency (PNTML) has diagnostic and prognostic value in the care of patients with fecal incontinence and in other patients with pelvic floor dysfunction in whom it is important to identify and quantify the nature of neuromuscular injury. PNS is a common and simple study that measures the latency through a direct reflex between stimulator site and recording site. The St. Marks probe is used for latency measurement between stimulator site and recording site (anal sphincter). Pudendal nerve conduction measures the reflex via the brain. PNS can also be used for urinary incontinence studies when the sphincter is stretched after childbirth.