术中超声造影在脑动静脉畸形切除术中的应用

目的探讨超声造影在脑动静脉畸形(AVM)切除术中的应用价值。方法对20例(幕上18例、幕下2例)经术前CT、MRI及数字减影血管造影法(DSA)检查诊断为AVM的患者分别行术中彩色多普勒血流成像(CDFI)模式、频谱多普勒模式及超声造影扫查,确定病变位置、深度、大小及其与周围组织的关系,记录不同方法显示供血动脉及引流静脉的数目,术后评价手术切除率。结果 (1)20例患者术中超声准确定位畸形血管团的位置。CDFI图像表现为典型的彩色镶嵌血管团,畸形血管团大小为1.1～6.5cm,距离硬膜0～2.7cm。供血动脉术前RI值0.29～0.56,术后RI值0.54～0.65。(2)20例患者行术中超声造影检查,畸形血管团大小为1.2～6.8cm。术中经股静脉团注造影剂7～14s后开始显影。正常脑动脉和供血动脉最先显影,而后病灶和脑组织显影,静脉系统最后显影。(3)20例患者CDFI模式显示供血动脉(FA)24支,引流静脉(DV)13支;术中超声造影显示供血动脉27支,引流静脉20支。(4)20例患者术后CDFI模式检查未发现病灶残留,结果与术后DSA检查结果一致,其中4例行术后超声造影检查。结论术中超声造影有助于完整了解AVM的血供模式,明确供血动脉与引流静脉的位置和数目,术后判断病变切除情况,提高对AVM诊断的准确性和全切率。

Application of intraoperative contrast enhanced ultrasound in cerebral arteriovenous malformations

Objective To investigate the diagnosis potential of contrast agents imaging in AVM surgical treatment. Methods Twenty patients diagnosed as AVM comfirmed by preoperative CT, MRI and DSA were enrolled. The color Doppler flow imaging (CDFI), pulsed Doppler imaging and ultrasound contrast agents imaging in intraoperative guidance were used, the lesion location, depth, size and its relationship with the surrounding tissue were observed. The number of feeding arteries and draining veins by different methods were...