腰骶神经根减压手术前、后及术中躯体感觉诱发电位与临床预后的相关性

观察腰骶神经根病变患者减压手术中DSEP改善程度与术后临床症状改善之间的相关性。对22例经CT或MRI检查证实的腰骶神经根压迫症患者，在术前及术后9周（8－10周）进行临床随访检查。结果减压手术中DSEP的波幅增高，术后临床症状明显改善（P＜0．01）；术后DSEP波幅较术前增高（P＜0．05，P＜0．01）；潜伏期缩短（P＜0．05，P＜0．01）。分析认为，脊神经根减压手术前DSEP变化与术后临床症状改善呈正相关；术中DSEP波幅改善可预示手术的满意结果及术后临床症状改善程度。

Correlation between dermatomal somatosensory-evoked potentials and clinical outcome in lumbosacral radiculopathy patients treated with nerve root decompression

This article is to evaluate the correlation between dermatomal somatosensory evoked potentials(DSEP) improvement and clinical outcome in patients with lumbosacral radiculopathy received nerve root decompression.Twenty two patients diagnosed as radiculomedullary were confirmed by the CT or MRI screen,they were investigated preoperatively and 9 week postoperatively.Compared with the preoperative,the postoperative clinical symptoms of the patients were significantly improved( P <0.05, P <0.01).The amplitudes of intraoperative and postoperative DSEP were significantly increased ( P <0.05, P <0.01),and the latencies were significantly shorter ( P <0.01) than that of preoperative ones.The changes of amplitude and latency of DSEP were positively correlated with the improvement of clinical symptoms after decompression.The increasesd amplitudes of intraoperative DSEP can prefigure the improvement of the clinical symptoms after decompression.