PubMed · 15138900
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Admir Hadzic. Peripheral nerve stimulators: cracking the code--one at a time.. https://doi.org/10.1016/j.rapm.2004.03.003
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Faecal incontinence is a common problem. Conservative measures are effective in a significant proportion of patients. Failure of conservative management has until recently meant recourse to surgical intervention. Surgical treatment is often associated with disappointing results. Recently, sacral nerve stimulation (SNS) has been developed as a minimally invasive, effective technique for idiopathic and acquired faecal incontinence. The technique uses chronic low-level electrical stimulation of the sacral nerves, or neuromodulation, to produce a clinically beneficial effect on the distal colon and rectum, the pelvic floor and the anal sphincter complex. SNS is a 2-stage procedure: a diagnostic stage - temporary percutaneous nerve evaluation (PNE), and a therapeutic stage - permanent SNS. The predictive value of PNE is high, and the surgical trauma and morbidity of both procedures extremely low. The technique has been adapted from its original application in urinary dysfunction. It is almost impossible to produce level 1 evidence for this type of intervention; however, the results are superior to other interventions. Patient selection criteria are evolving, but there is a growing body of evidence that supports its use as first-line treatment for faecal incontinence in patients where conservative measures have failed.
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Recent technological advancements in microelectronics have led to the establishment of systems for restoration of basic functions in spinal cord injured (SCI) persons using functional electrical stimulation (FES). FES systems for the restoration of bladder and diaphragm function are well established in clinical practice. While FES systems in the lower extremities for standing/walking have not yet achieved widespread clinical acceptance, devices which enhance or restore the grasp function in tetraplegic patients with missing control of hand and fingers are demonstrably successful. Especially with the use of implantable systems a reliable, easy to handle application is possible. The most recent developments in micromechanical engineering are aimed at providing minimally invasive, subminiature systems for functional support in incomplete SCI persons. The possibility of direct brain control of FES systems will expand the application of neuroprostheses for patients with injury of the high cervical spinal cord.