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KMID : 0352119890050030291
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Journal of Kyung Hee University
1989 Volume.5 No. 3 p.291 ~ p.299
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A STUDY OF THE SPINAL NERVE COMPRESSION IN THE PIG
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Abstract
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Object: There are several different situations of nerve com )ression such as herniated nucleus pulposus, spinal stenosis, trauma, carpal tunnel syndrome, thoracic out-let , yndrome and peroneal nerve compression at the fibul it neck.
These condition may produce sensory and motor dysft action, but the pathophys-iology of nerve is poorly unde stood. The purpose of this study is to compare the nerve function between motor and sensory under the compxession and to corn-pare the nerve function under the d fferent compression farces.
Methods: Pigs weighing :3040 kg were intubated. Acarotid arterial catheter, internal jugular venous catheter and rectal temperature probe were placed.
Thereby temperature and blood pressure were monitored and maintained at const-ant levels. Placed the pig on prone position without abdominal compression.
After exposing the sicro-coccygeal lamina, 2-level laminectomy was performed.
The compression device was consisted of 2 L-shaped nails, plexiglass plate, and polyethylene bag. By using 3 pairs of electric stimulating electrodes(1 pair of screws proximal to the laminectomy, 1 pair of retractable electrobe for the stimulation distal to the compression, and 2 platinum needle electrod-es in the tail) the amplitude was recorded with Cadwell-5200.
Conclusion:
1) The amplitude of the sensory decreased to a greater degree.
2) The amplitude of the sensory recovered incompletely as compared to the motor.
3) In the 50 mmHg compression group, there is no significant neuro-physiologic deficit.
4) Higher compression pressures induce increasing conduction defi-cit and more severe neurophysiologic deficits were produced by longer compression.
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