ID: 418 (Conflict of Interest: K)

Entwicklung einer nicht-invasiven EMG-Sonde zur Darstellung der Innervation in der Sphinktermuskulatur

C.Kiese1, A.-L.Danzer2, B.Schickling3, H.-P.Landgraf4, H.Ketterl3, A.Nicolau Torra3, T.Reitmeier3, W.Schulte-Mattler2, J.Hubertus5, D.von Schweinitz5
1Universitätsklinikum der LMU München, München
2Universitätsklinikum Regensburg, Regensburg
3OTH Regensburg, Ostbayerische Technische Hochschule, Regensburg
4AEGAEON Technologies, Regensburg
5Dr. von Haunersches Kinderspital, Klinikum der Universität München, München



We hypothesize that it would be beneficial to investigate innervation patterns in sphincter muscles pre- and postoperatively to improve the understanding of individual innervation patterns, postoperative reinnervation and incontinence. At present no diagnostic tool is available to visualize innervation patterns painlessly and non-invasively. 

Material und Methoden


A non-invasive surface electromyography probe was built to provide a safe, fast and painless examination of sphincter innervation. No external electrical stimulation is needed during examination. As a proof of concept, the probe was evaluated with 20 healthy volunteers where signals were obtained from contractions of the orbicularis oris muscle. We developed software for automated signal processing and displaying results in an intuitive manner. We investigated the signals with regards to reproducibility and validation.



The probe enables a fast and painless examination lasting 15s, no side effects were observed. An automated display of results is possible within minutes providing an intuitive geometric diagram. The analysis of 1200 datasets proved good intraindividual reproducibility while innervation patterns of different probands could be distinguished from each other.



We present a prototype of a diagnostic tool capable to detect innervation zones in voluntary contracted muscles non-invasively. Our results will be the basis for further research investigating the pathophysiology of anorectal innervation.