BMJ:缺血预处理并不能改善缺血损伤的临床预后

2016-11-08 xing.T MedSci原创

缺血预处理对总体死亡风险影响不大。其对卒中和急性肾损伤的影响与方法学上的不确定性和事件发生率较低有关。缺血预处理还不能被推荐为常规手段使用,除非有进一步的高品质和有力的证据表明缺血预处理的好处。

缺血预处理,即进行周期性、非致命性的血管床缺血,已被提倡作为一种减轻缺血损伤的手段,其中缺血损伤包括心肌缺血、急性肾损伤和缺血性卒中。在许多临床疾病领域已经开始对它的研究,包括缺血性心脏病、卒中、心脏手术、移植、急性肾损伤,并发现了缺血预处理具有许多潜在的有益的效应。近日,顶级医学杂志BMJ上发表了一篇来自澳大利亚悉尼大学乔治全球健康研究所的Louisa Sukkar研究员及其同事的荟萃分析文章,旨在总结分析在不同疾病中缺血预处理对其主要临床预后的利弊。 

在该系统回顾和荟萃分析中,研究人员检索了MEDLINEEMBASECochrane数据库、国际临床试验注册平台这些数据库从建立之初到201510月的研究数据。研究人员选择了比较缺血预处理对临床预后影响的所有随机对照试验,研究数据的提取由两位研究人员分别独立进行提取,研究者采用随机效应模型计算全因死亡率和估计其他预先指定的临床预后。P0.1的全因死亡率和次要终点通过等级评估工具来评估研究的质量,研究者采用Meta回归和Cochran C检验来评估预先指定的特性,采用哥本哈根试验单元法进行序贯分析。 

在该荟萃分析中,共纳入了85个报道和89个随机对照研究,这些研究的中位参与者人数为80(四分位间距为60-149)人,中位研究时间为1(研究时间长短范围为1 -72)个月。研究者发现无论何种临床疾病,即使采用特殊的干预措施,缺血预处理对全因死亡率也并无影响(68个随机对照研究;424个临床事件;11 619名参与者;风险比为0.9695%置信区间为0.80-1.16P=0.68;中等质量的证据)。但是缺血预处理可以减少一些次要终点事件的发生,包括卒中(18个试验;5995名参与者;149个临床事件;风险比为0.7295%置信区间为0.52-1P=0.048;非常低质量的证据)和急性肾损伤(36个试验;8493名参与者;1443个临床事件;风险比为0.8395%置信区间为0.71-0.97P=0.02;低质量证据)。 

由此可见,缺血预处理对总体死亡风险影响不大。其对卒中和急性肾损伤的影响与方法学上的不确定性和事件发生率较低有关。缺血预处理还不能被推荐为常规手段使用,除非有进一步的高品质和有力的证据表明缺血预处理的益处。 

原始出处: 

Louisa Sukkar, et al. Effects of ischaemic conditioning on major clinical outcomes in people undergoing invasive procedures: systematic review and meta-analysis. BMJ. 07 November 2016.

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    2017-05-11 gaoxiaoe
  2. [GetPortalCommentsPageByObjectIdResponse(id=1848151, encodeId=b45518481518a, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Thu May 11 22:12:00 CST 2017, time=2017-05-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=154848, encodeId=201a154848b8, content=谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLC1BMzZWdMSPQWuib6BtQGicK8ygGBM6YakpfkRc67soFSuKbZr86enL1KggQZEZbgWSeicJibafmYfQ3AibicIHMwwicmDShfRFvvI38/0, createdBy=272a110164, createdName=laoli, createdTime=Thu Nov 10 17:26:08 CST 2016, time=2016-11-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=154652, encodeId=205115465213, content=学习价值, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160811/IMG57AC91915ACA64463.jpg, createdBy=9c351934462, createdName=知难而进, createdTime=Wed Nov 09 23:21:33 CST 2016, time=2016-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1397092, encodeId=e973139e092d8, content=<a href='/topic/show?id=8bee565436d' target=_blank style='color:#2F92EE;'>#损伤#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56543, encryptionId=8bee565436d, topicName=损伤)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eoNX3lUOlDKGBUEPNwZx0nibmdcFyeibnX4WMhUSCU2REpGRWtSmnT2CCs0dA5waxvJknYDxwtYnIcQ/132, createdBy=294e2500218, createdName=ms3046638856685384, createdTime=Wed Nov 09 15:12:00 CST 2016, time=2016-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1534705, encodeId=abae1534e0574, content=<a href='/topic/show?id=6be9230842e' target=_blank style='color:#2F92EE;'>#临床预后#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=23084, encryptionId=6be9230842e, topicName=临床预后)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a72412536387, createdName=budeshao, createdTime=Wed Nov 09 15:12:00 CST 2016, time=2016-11-09, status=1, ipAttribution=)]
    2016-11-10 laoli

    谢谢分享!

    0

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    2016-11-09 知难而进

    学习价值

    0

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