The diagnostic value of SEP in LDH and its forensic significance.
- Author:
Xiao-ming XU
1
;
Xing-ben LIU
;
Chuan-fei ZHENG
Author Information
1. Department of Forensic Medicine, China Medical University, Shenyang 110001, China. xxmzhj@163.com
- Publication Type:Journal Article
- MeSH:
Adult;
Electric Stimulation;
Electrodiagnosis/methods*;
Evoked Potentials, Somatosensory;
Female;
Forensic Medicine;
Humans;
Intervertebral Disc Displacement/physiopathology*;
Lumbar Vertebrae;
Magnetic Resonance Imaging;
Male;
Middle Aged;
Sensitivity and Specificity;
Spinal Nerve Roots/physiopathology*;
Tibial Nerve/physiology*
- From:
Journal of Forensic Medicine
2005;21(1):30-33
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To evaluate the diagnostic value of somatosensory evoked potential(SEP) in lumbosacral disc herniation(LDH).
METHODS:Posterior tibial nerve somatosensory evoked potential(PTNSEP) and dermatomal somatosensory evoked potential (DSEP) were recorded from 60 patients with radiculopathy caused by LDH and 30 healthy subjects.
RESULTS:DSEP was abnormal in 56 cases (93.3%) and PTNSEP was abnormal in 26 cases (43.3%). The significant difference was observed (P<0.001). The abnormality of DSEP from L4 dermatome was detected mainly in patients with L3-4 LDH, the abnormality of DSEP from L5 dermatome was detected mainly in patients with L4-5 LDH, the abnormality of DSEP from L5S1 dermatome was detected mainly in patients with S1 LDH. DSEP can reflect the compressed extent of nerve root.
CONCLUSIONS:There was a good correlation of DSEP with lumbosacral nerve root injury,which supplement the information that can not be provided by imaging examingation. DSEP is a sensitive electrophysic method that not only is used to evaluate single nerve root function, but also is helpful in the location of the lesion.
