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Electrical stimulation-induced changes in double-wrapped muscles for dynamic graciloplasty
D Bouamrirène1, J P Micallef, P Rouanet
1Service de Chirurgie Viscérale, Centre Hospitalier Universitaire St Eloi, Montpellier, France.
Archives of Surgery (Chicago, Ill. : 1960)
|October 13, 2000
Summary
Electrical stimulation of transposed gracilis muscles for fecal incontinence treatment improves fatigue resistance but causes muscle atrophy and fibrosis. This degeneration stems from surgical dissection and stimulation, impacting dynamic graciloplasty outcomes.
Area of Science:
- Surgical reconstruction
- Muscle physiology
- Pelvic floor dysfunction
Background:
- Dynamic graciloplasty is a surgical technique to treat fecal incontinence.
- Various muscle loop configurations exist, including double wraps.
- Understanding muscle transformation and damage is crucial for optimizing outcomes.
Purpose of the Study:
- To investigate muscle transformation and damage in transposed gracilis muscles after long-term stimulation.
- To evaluate the effects of surgical dissection and electrical stimulation on gracilis muscle.
Main Methods:
- Four groups of New Zealand white rabbits were used: unstimulated, unilaterally stimulated, bilaterally stimulated, and controls.
- Muscle properties were assessed using electrophysiological, immunohistochemical, and biochemical techniques.
Main Results:
- Long-term stimulation induced transformation of muscle fibers from fast-contractile glycolytic to slow-contractile oxidative types, enhancing fatigue resistance.
- Muscle alterations included fiber atrophy and fibrosis.
Conclusions:
- Muscle degeneration in dynamic graciloplasty is likely caused by interrupted collateral blood supply from surgical dissection.
- Long-term stimulation exacerbates these degenerative changes, impacting the transposed muscle's integrity.