Intraoperative pelvic nerve stimulation performed under continuous electromyography of the internal anal sphincter

Purpose The aim of this animal study was to investigate the effect of intraoperative pelvic nerve stimulation on internal anal sphincter electromyographic signals in order to evaluate its possible use for neuromonitoring during nerve-sparing pelvic surgery. Methods Eight pigs underwent low anterior...

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Bibliographic Details
Published in:International journal of colorectal disease 2010-11, Vol.25 (11), p.1325-1331
Main Authors: Kneist, Werner, Kauff, Daniel W, Rahimi Nedjat, Roman K, Rink, Andreas D, Heimann, Axel, Somerlik, Karin, Koch, Klaus P, Doerge, Thomas, Lang, Hauke
Format: Article
Language:English
Subjects:
Anal Canal - innervation
Anal Canal - surgery
Animals
Area Under Curve
Biological and medical sciences
Electric Stimulation
Electrical stimulation
Electrodes
Electrodiagnosis. Electric activity recording
Electromyography
Female
Gastroenterology
Gastroenterology. Liver. Pancreas. Abdomen
Hepatology
Internal anal sphincter
Internal Medicine
Intraoperative Care
Investigative techniques, diagnostic techniques (general aspects)
Male
Medical sciences
Medicine
Medicine & Public Health
Nerve-sparing surgery
Nervous system
Original Article
Pelvic autonomic nerves
Pelvis - innervation
Pelvis - surgery
Proctology
rectum
Surgery
Sus scrofa
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Summary:Purpose The aim of this animal study was to investigate the effect of intraoperative pelvic nerve stimulation on internal anal sphincter electromyographic signals in order to evaluate its possible use for neuromonitoring during nerve-sparing pelvic surgery. Methods Eight pigs underwent low anterior rectal resection. The intersphincteric space was exposed, and the internal (IAS) and external anal sphincter (EAS) were identified. Electromyography of both sphincters was performed with bipolar needle electrodes. Intermittent bipolar electric stimulation of the inferior hypogastric plexus and the pelvic splanchnic nerves was carried out bilaterally. The recorded signals were analyzed in its frequency spectrum. Results In all animals, electromyographic recordings of IAS and EAS were successful. Intraoperative nerve stimulation resulted in a sudden amplitude increase in the time-based electromyographic signals of IAS (1.0 (0.5-9.0) μV vs. 4.0 (1.0-113.0) μV) and EAS (p 
ISSN:0179-1958
1432-1262
DOI:10.1007/s00384-010-1015-5