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Evoked spinal cord potentials for diagnosis during brachial plexus surgery
T Murase1, H Kawai, T Masatomi
1Department of Orthopaedic Surgery, Hoshigaoka Koseinenkin Hospital, Osaka, Japan.
The Journal of Bone and Joint Surgery. British Volume
|September 1, 1993
Summary
Evoked spinal cord potentials (ESCP) offer a superior method for intraoperative diagnosis of brachial plexus injuries. This electrodiagnostic technique provides clearer and stronger signals than somatosensory evoked potentials, aiding in lesion identification.
Area of Science:
- Neurosurgery
- Neurology
- Electrophysiology
Background:
- Traumatic brachial plexus palsy presents diagnostic challenges during surgery.
- Accurate intraoperative assessment is crucial for effective treatment planning.
Observation:
- Evoked spinal cord potentials (ESCP) were recorded from the cervical epidural space following direct stimulation of spinal nerves.
- ESCP were compared with somatosensory evoked potentials (SEP) and myelographic findings in 17 patients.
Findings:
- ESCP were more distinct and had 5-10 times greater amplitude than SEP.
- ESCP detected nerve continuity to the spinal cord in cases where SEP failed.
- ESCP provided diagnostic information even when myelography suggested abnormalities.
Implications:
- Intraoperative ESCP recordings offer valuable insights into traumatic brachial plexus palsy lesions.
- This technique enhances diagnostic accuracy during surgical exploration.
- ESCP can improve surgical decision-making and patient outcomes.