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实际问题:放了支架,还能做磁共振吗?

2015-04-22 佚名 介入家园

随着介入治疗技术普及,心脏支架,颅内支架,大动脉支架、食管胆道支架等各种各样的支架越来越多地出现在临床工作中,而随之而来的问题是:放了支架后,还能做磁共振吗?毕竟磁共振是当前非常重要的一种检查手段,如果不能够做磁共振的话,将会影响很多疾病的诊断。不光是支架,现在介入治疗中还会使用很多的人体植入物,如:弹簧圈、滤器、动脉夹及人造血管等等。这些做磁共振会有影响吗?我们的教材上没有答案,为此,小编查阅了

随着介入治疗技术普及,心脏支架,颅内支架,大动脉支架、食管胆道支架等各种各样的支架越来越多地出现在临床工作中,而随之而来的问题是:放了支架后,还能做磁共振吗?毕竟磁共振是当前非常重要的一种检查手段,如果不能够做磁共振的话,将会影响很多疾病的诊断。



不光是支架,现在介入治疗中还会使用很多的人体植入物,如:弹簧圈、滤器、动脉夹及人造血管等等。这些做磁共振会有影响吗?我们的教材上没有答案,为此,小编查阅了相关文献,总结如下,如有不当,欢迎指正。

首先,我们先明确下,磁共振检查有可能会造成什么样的伤害:磁共振扫描仪的静磁场很强大,对于铁磁性的物体可能会造成移位,进行磁共振扫描时,梯度磁场的快速切换,会在金属线或导丝中产生电流,可能会导致心律失常,除了磁场因素外,射频脉冲被人体吸收后,会导致患者体温升高, 从而引起植入物金属元件触点的温度升高,这些脉冲也有可能干扰某些电子元件。以上内容摘自美国心脏病学院在2010年发表的心血管磁共振专家共识。

所以,如果是含铁的置入物,它会在固定的磁场中会产生铁磁性,在做磁共振时就有可能会引起置入物在体内的移动。同时,磁共振扫描时的射频波会产热,使导丝或电极的温度升高1℃左右,有损坏置入物的风险。

目前我国使用的绝大部分支架、弹簧圈及滤器为镍钛、钛合金和其他合成材料,为非铁磁性和微弱磁性,因此目前认为这类植入物置入人体后可以进行MRI检查,但一般推荐在支架等植入6周后做MRI检查更为安全,这时支架等植入物与血管等已有更好的吻合,不论是裸支架还是药物支架,目前认为在3.0T MR或以下场强的MR机上进行检查是安全的。

同样,药盒系统或是留置的导管日趋增多,这类病人在手术后能否进行磁共振检查已受到大家的关注。药盒通常植入于胸部皮下,组成材料有合金、硅橡胶和塑料等。通常为非铁磁性和弱磁性,在体内外测试,其在磁场下无发生变形,扭曲等现象,因此植入药盒和导管被认为是可以进行MRI检查的。

当然,这里指的是绝大部分,不排除某些不入流的植入物采用一些有磁性的材料,所以最好是明确患者所使用的植入物是什么材料。

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    2015-05-28 alicelee

    0

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    2015-05-28 alicelee

    0

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    2015-04-24 jiaotangtang

    了解

    0

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    2015-04-23 chenhui888

    顿悟

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=25178, encodeId=8ab9251e8f5, content=。, beContent=null, objectType=article, channel=null, level=null, likeNumber=121, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1c08106028, createdName=alicelee, createdTime=Thu May 28 14:24:00 CST 2015, time=2015-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25179, encodeId=435b251e9b0, content=。, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1c08106028, createdName=alicelee, createdTime=Thu May 28 14:24:00 CST 2015, time=2015-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1341535, encodeId=93801341535c6, content=<a href='/topic/show?id=24b8e37529a' target=_blank style='color:#2F92EE;'>#磁共振#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73752, encryptionId=24b8e37529a, topicName=磁共振)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=24a22500182, createdName=1696533704_45270454, createdTime=Fri Apr 24 08:11:00 CST 2015, time=2015-04-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21842, encodeId=cbc0218423c, content=了解, beContent=null, objectType=article, channel=null, level=null, likeNumber=152, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8d891622183, createdName=jiaotangtang, createdTime=Fri Apr 24 07:03:00 CST 2015, time=2015-04-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21753, encodeId=fffd21e5393, content=顿悟, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=121e1622385, createdName=chenhui888, createdTime=Thu Apr 23 11:22:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21712, encodeId=f40621e125f, content=谢谢分享,起搏器自己IABP仍然是绝对是禁忌症, beContent=null, objectType=article, channel=null, level=null, likeNumber=140, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20150703/IMG5596245C1FA9E9054.jpg, createdBy=a63a1622612, createdName=frost1025, createdTime=Thu Apr 23 08:27:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21700, encodeId=e02221e00b3, content=保险起见 最好避免, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=bec31378570, createdName=sunqi2001, createdTime=Thu Apr 23 05:48:00 CST 2015, time=2015-04-23, status=1, ipAttribution=)]
    2015-04-23 frost1025

    谢谢分享,起搏器自己IABP仍然是绝对是禁忌症

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=25178, encodeId=8ab9251e8f5, content=。, beContent=null, objectType=article, channel=null, level=null, likeNumber=121, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1c08106028, createdName=alicelee, createdTime=Thu May 28 14:24:00 CST 2015, time=2015-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=25179, encodeId=435b251e9b0, content=。, beContent=null, objectType=article, channel=null, level=null, likeNumber=112, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1c08106028, createdName=alicelee, createdTime=Thu May 28 14:24:00 CST 2015, time=2015-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1341535, encodeId=93801341535c6, content=<a href='/topic/show?id=24b8e37529a' target=_blank style='color:#2F92EE;'>#磁共振#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73752, encryptionId=24b8e37529a, topicName=磁共振)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=24a22500182, createdName=1696533704_45270454, createdTime=Fri Apr 24 08:11:00 CST 2015, time=2015-04-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21842, encodeId=cbc0218423c, content=了解, beContent=null, objectType=article, channel=null, level=null, likeNumber=152, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8d891622183, createdName=jiaotangtang, createdTime=Fri Apr 24 07:03:00 CST 2015, time=2015-04-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21753, encodeId=fffd21e5393, content=顿悟, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=121e1622385, createdName=chenhui888, createdTime=Thu Apr 23 11:22:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21712, encodeId=f40621e125f, content=谢谢分享,起搏器自己IABP仍然是绝对是禁忌症, beContent=null, objectType=article, channel=null, level=null, likeNumber=140, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20150703/IMG5596245C1FA9E9054.jpg, createdBy=a63a1622612, createdName=frost1025, createdTime=Thu Apr 23 08:27:00 CST 2015, time=2015-04-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=21700, encodeId=e02221e00b3, content=保险起见 最好避免, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=bec31378570, createdName=sunqi2001, createdTime=Thu Apr 23 05:48:00 CST 2015, time=2015-04-23, status=1, ipAttribution=)]
    2015-04-23 sunqi2001

    保险起见 最好避免

    0

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