颅外段椎动脉峰值血流参数离散度对颈椎病的超声诊断价值简

目的 探讨超声观察颅外段椎动脉峰值血流参数离散度对颈椎病的超声诊断价值.方法 观察比较44例颈椎病共88条椎动脉和33例健康人共66条椎动脉之间收缩期峰值血流速度（PSV）、舒张末期血流速度（EDV）、阻力指数（RI）、收缩期与舒张末期流速比（S/D）,峰值流速离散度（PVD）.应用受试者工作特径（ROC）曲线选取临界值.结果 两组间PSV、S/D、PVD差异显著（P＜0.01）.以PVD 7.85为诊断值,敏感性为83.7%,特异性72.9%.若以PVD值为10.2为诊断值,则敏感性为55.8%,特异性为100%.以S/D值2.5为诊断值,敏感性为83.7%,特异性62.5%.结论 应用ROC曲线确定的PVD值与S/D值将有助于颈椎疾病的诊断与鉴别诊断.

Diagnostic value of dispersion of peak systolic velocity of extracranial vertebral artery for cervical spondylosis by ultrasonography

Objective To assesse the ultrasonic value of dispersion （PVD） of peak systolic velocity of extracranial vertebral artery in diagnosis of cervical spondylosis. Methods A total of 88 vertebral arteries in 44 patients with cervical spondylosis and 66 vertebral arteries in 33 health volunteers were evaluated by color Doppler. The inner diameter, peak systolic velocity （PSV） , end diastolic velocity （ EDV）, resistant index （ RI）, peak systolic velocity dispersion （ PVD ）, Ratio （ S/D ） of peak systolic velocity （ PSV ） between end diastolic velocity （EDV） of extracranial vertebral arteries were measured. The cutoff value of PVD and S/D was analyzed by ROC curve. Results The difference of PSV,S/D and PVD was significant between two groups. The sensitivity was 83.7% and specificity was 72.9% when the cutoff value of PVD was 7.85 in diagnosis of cervical spondylosis. The sensitivity was 55.8% and specificity was 100% when PVD was 10.2. The sensitivity was 83.7% and specificity was 62.5% when the cutoff value of S/D was 2.5. Conclusion The different cutoff value of PVD is helpful in diagnosing or screening of cervical spondylosis.