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The hemodynamic reseach for the spinal anterior ramus of anterior spinal artery by CDFI
万芸 徐佩莲
Wan yun ,Xu peilian
Methods: As the right and left vertebral artery (VA) were observed with CDFI and TCD through the great occipital foramen , bilateral anterior spinal rami (ASR) of the anterior cervical spinal artery (ACSA) were found simultaneously . The bilateral ASR were exactly the mirror image of bilateral VA , which formed a rhombic ring ,therefore the peak velocities (PV) and resistance index (RI) of their arterial flows were measured. Results , the flow direction of ACSA was toward the probe with red color while the flow of VA was away from the probe with blue color . The Vmax of bilateral ACSA was lower significantly than that of the Vmax with positive correlation . The RI of ACSA are little lower than that of VA , too . The wave form of ACSA was different from that of VA , that is , the systolic peak was high and sharp with high sound frequency .
KEYWORDS: Color doppler flow image Transcranial doppler Hemodynamics Cervical spinal anterior arteriy Spinal anterior rami
颈脊髓前动脉(ACSA)脊前支,起始于两椎动脉(VA)汇合形成基底动脉之前。临床上脊髓血管病的诊断主要依靠脑脊液及脊髓血管造影技术,尤其是近年来应用较多的数字减影血管造影(DSA),尚缺乏一种常规,无创的评价ASA血流动力学的方法.本院自开展彩色多普勒(CDFI)加经颅多普勒(TCD)于颅底动脉等血流动力学检测以来,在观察左右椎动脉(VA)的同时,检查了100例ACSA脊前支。现报告如下:
资料与方法
一、研究对象
本组100例,男38例,女62例,年龄16~70岁,平均47±15岁,均为无神经系统疾病的门诊就医者。
二、研究方法
1、检查仪器:使用Logiq500Pro 彩色多普勒超声仪,探头频率2.0MHz,取样容积2-4mm。
2、操作:100例由同一医师操作。病人取坐位,屈颈,取枕窗检测。首先用CDFI充分显示枕骨大孔及双侧VA颅內段,见VA呈“V”字形分布于枕骨大孔的前半部分见图1,枕骨大孔的后半部呈倒置“V”字形的ACSA脊前支的左右支,从而与左右VA构成“◇”菱形环见图1,然后,将取样容积置于所测ACSA脊前支上任一点,均可获取Vmax,RI,此时必须将超声束与血流夹角校正为〈60度。
3、测量指标 :①静息时最大血流速度(Vmax),② 阻力指数(RI)。
4、统计学分析:测量值以X±S表示,ACSA与VA之间采用相关性分析,左右两侧ACSA脊前支之间采用t检验。
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