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Electrical stimulation induced sphincter fatigue during voiding.

J S Li1, M Hassouna, M Sawan

  • 1Urology Research Laboratory, Royal Victoria Hospital, McGill University, Montreal, Quebec, Canada.

The Journal of Urology
|September 1, 1992
PubMed
Summary
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Electrical stimulation can fatigue the striated sphincter, improving bladder emptying. This method offers a non-surgical alternative to rhizotomy for sacral nerve stimulation-induced voiding.

Area of Science:

  • Neuroscience
  • Urology
  • Biomedical Engineering

Background:

  • Sacral nerve stimulation aids bladder emptying but can cause sphincter contraction, hindering micturition.
  • Rhizotomy (surgical nerve cutting) is a current method to overcome this, but carries surgical risks.

Purpose of the Study:

  • To evaluate the feasibility of using electrical stimulation to fatigue the striated sphincter.
  • To compare the efficacy of sphincter fatigue via electrical stimulation against rhizotomy in facilitating bladder emptying.

Main Methods:

  • Stimulated S2 nerves and measured bladder outlet resistance.
  • Used pudendal nerve stimulation to induce sphincter fatigue with specific parameters (3 V, 100-500 Hz, 100 µs for 15-20 sec).
  • Conducted combined pressure-flow studies to assess bladder emptying.

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Main Results:

  • Sphincter fatigue was successfully induced using pudendal nerve electrical stimulation.
  • The parameters for optimal sphincter fatigue were identified.
  • Pressure-flow studies demonstrated that electrical stimulation to fatigue the sphincter was as effective as rhizotomy in achieving bladder emptying.

Conclusions:

  • Electrical stimulation of the pudendal nerve can effectively fatigue the striated sphincter.
  • This non-surgical approach provides a viable alternative to rhizotomy for improving bladder emptying during sacral nerve stimulation therapy.