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An animal experimental study on the protective efficiency of the retrievable artery filter
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 10
- DOI:
- 10.3760/j.issn:1005-1201.2001.10.003
- Key Word:
- 血栓栓塞;设备设计;放射学,介入性;动物,实验
Abstract： 目的制作犬颈内动脉的选择性灌注模型,验证可取出式动脉滤器对犬脑的保护效率.方法健康杂种犬12只,随机分为滤器组及对照组.以明胶海绵栓塞颈外动脉,制作犬颈内动脉的选择性灌注模型.滤器组每只犬于颈总动脉内滤器近侧注入1 m×1 mm×1 mm大小的血栓5个,对照组犬则不用滤器,直接注入栓子.术后观察动物神经系统功能改变情况,术后24 h行犬脑MR检查,术后7 d将犬脑取出、固定,行大体病理检查.结果栓子注入后血管造影,对照组犬中,5只显示颈内动脉分支闭塞,滤器组犬均未见颈内动脉栓塞表现.对照组犬中,5只术中出现对侧肢体及颈部强直,其中2只在注入栓子后于术中死亡;滤器组犬中,2只术后出现栓塞对侧肢体轻瘫,12～24 h后症状消失.对照组犬中,4只术后MR显示栓塞侧大面积脑梗死;滤器组犬中,除1只犬术后MR显示术侧外囊点状梗死灶外,其余5只犬术后MR显示正常.术后大体病理表现与MR结果相符.结论动脉滤器对约1mm大小的较大栓子有令人满意的捕获能力,能有效防止严重脑梗死并发症的发生.但此种动脉滤器对小于1mm的栓子的捕获能力尚待进一步研究.
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