彩色多普勒超声评价儿童直立性调节障碍的颈动脉血流变化

COLOR DOPPLER FLOW IMAGING EVALUATION OF CAROTID ARTERIES HEMODYNAMICS OF PAEDIATRIC STANDING REGULATION DISORDER

目的应用彩色多普勒超声(CDFI)检查,探讨儿童直立性调节障碍的双侧颈总动脉(CCA)、双侧椎动脉(VA)血流动力学变化特点并讨论其对本病诊断及临床治疗的指导意义。方法按照常规探查40例直立性调节障碍患儿双颈总动脉、双椎动脉的收缩期峰值流速(Vs)、舒张末血流速度(Vd)、平均血流速度(Vm)、阻力指数(RI),并与30例健康儿童对照。对患儿治疗前后各参数进行对比。结果40例患儿双侧颈总动脉,双侧椎动脉血流速度均升高,有31例患儿有1或2对动脉平均血流速度不对称,患儿组治疗前后比较颈动脉血流速度有相应降低,且平均血流速度不对称情况消失。结论本组患儿颈部动脉血流速度增高及流速不对称反映出脑血流状态不稳定性,是一种亚临床状态,CDFI可作为该病的一种新的诊断手段,减少误诊,同时也可对治疗效果作出评价。

Objective To explore the carotid and vertebral arteries hemodynamie characteristics and its significance for patients with PSRD. Methods We examined and recoreded systolic peak flow velocity（Vs）, diastolic peak flow velocity （Vd）, mean flow velocity （Vm） of common carotid artery and vertebral artery in 40 eases with PSRD and 30 healthy,and check again after treatment. Results The increase of velocities was found in all patient groups, and marked asymmetry of mean flow velocity in corresponding intracranial arteries （1 or 2 pairs） was found in 31 patients; after treatment, we found decrease of velocities in those arteries. Conclusion The increase of velocities and the flow asymmetries suggest the vascular instability, it is a new way to diagnosis and evaluate the result of treatment.