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Reliability of dermatomal somatosensory-evoked potential in the evaluation of lumbosacral nerve root injury A concurrent case-control study

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Neural Regeneration Research 2008年第1期3卷 57-60页

作者： Ningjiang Shen Jian Chen Guangji Wang Xiaoli Wu Yutian Wang Department of Orthopaedic Surgery Hainan Provincial People＇s Hospital Haikou 570311 Hainan Province China

BACKGROUND： It has been reported that dermatomal somatosensory evoked potential （DSEP） can be used for diagno.ing nerve root injury in patients with lumbar disc herniation （LDH）, and that 83% 95% of patients suffer from the disease. Body height correction is no. performed prior to determinations of latency and latency difference between the healthy and affected sides. However, latency no.iceably correlates to body height. OBJECTIVE： This study aims to determine the lumbosacral nerve root injury in patients with LDH by DSEP, and to evaluate the sensitivity of the DSEP difference between the healthy and affected sides using a diagno.tic index following body height correction. DESIGN： A case-control observation. SETTING： Department of Orthopedic Surgery, Hainan Provincial People＇s Hospital. PARTICIPANTS： Ninety-six patients, comprised of 67 males and 29 females, with an average age of 43 years and a mean body height of 1.65 m （range 1.48-1.81 m）, were recruited for this study. These patients suffered from unilateral lower limb radiation pain and received treatment at the Department of Orthopedic Surgery, Hainan Provincial People＇s Hospital between January 2004 and December 2006. All patients were confirmed to suffer from LDH at the L3-4, L-5, and/or Ls-SI by CT and/or MRI examinations. Central nervous system diseases were excluded. In order to obtain a no.mal reference value, DSEP was determined for a group of 50 subjects, who concurrently received health examinations in the same department. The subjects had no.previous history of back leg pain or nervous system disease. The group of healthy controls included 26 males and 24 females, with an average age of 37 years and a mean body height of 1.63 m （range 1.50-1.80 m）. Written informed consent was obtained from all subjects for laboratory samples. The protocol was approved by the Hospital＇s Ethics Committees. DSEP was determined with myoelectricity-evoked potential equipment （Keypoint, Batch no. 9020A0042591, Dantec Com

关键词： dermatomal somatosensory evoked potential lumbar disc herniation nerve root injury

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