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Blood:输血竟然可以降低镰刀型细胞贫血患儿脑梗死的风险!

2017-12-19 MedSci MedSci原创

中心点:输血可降低SCA患者的全脑CBF和OEF,表明输血可通过缓解脑代谢应激而降低梗死风险。对于SCA患者,OEF最高的部位为深层白质,也是梗死的高风险区;输血可降低单位体积升高的OEF。摘要:输血是预防小儿镰刀型细胞贫血(SCA)发生中风的主要措施,但其涉及的生理机制尚不完全清楚。SCA患者,大脑血流(CBF)和氧摄取量(OEF)均升高,可能是动脉血氧含量(CaO2)减少的代偿。研究人员推测换

中心点:

输血可降低SCA患者的全脑CBF和OEF,表明输血可通过缓解脑代谢应激而降低梗死风险。

对于SCA患者,OEF最高的部位为深层白质,也是梗死的高风险区;输血可降低单位体积升高的OEF。

摘要:

输血是预防小儿镰刀型细胞贫血(SCA)发生中风的主要措施,但其涉及的生理机制尚不完全清楚。SCA患者,大脑血流(CBF)和氧摄取量(OEF)均升高,可能是动脉血氧含量(CaO2)减少的代偿。

研究人员推测换血可通过提高CaO2来降低CBF和OEF,进而减轻大脑的氧代谢压力。

21位SCA患儿,予以长期换血疗法(CTT),并于治疗前和换血后行MRIs检查。用动脉自旋标记和非对称自旋回波序列分别测定CBF和OEF,并将输血前后的检测结果进行对比。

输血提高了Hb(9.1-10.3d/dL,p<0.001)的水平,同时降低Hb S(39.7-24.3%,p<0.001)的浓度。输血降低了CBF(88-82.4ml/100g/min,p=0.004)和OEF(34.4-31.2%,p<0.001)。

无论阈值(36、38、40%)是多少,输血均可降低深层白质的0EF峰值(SCA患者发生梗死的高风险位置)(p<0.001)。全脑和区域性提高的CBF和OEF的水平的降低,提示CTT可通过减轻患者和组织特异性的脑代谢应激来降低儿科SCA患者脑梗死的风险。

原始出处:

Kristin P.Guilliams,et al.Red cell exchange transfusions lower cerebral blood flow and oxygen extraction fraction in pediatric sickle cell anemia.Blood  2017  :blood-2017-06-789842;  doi: https://doi.org/10.1182/blood-2017-06-789842

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    2017-12-21 windight
  2. [GetPortalCommentsPageByObjectIdResponse(id=1259681, encodeId=749f125968182, content=<a href='/topic/show?id=569c9382389' target=_blank style='color:#2F92EE;'>#输血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93823, encryptionId=569c9382389, topicName=输血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ec9955, createdName=windight, createdTime=Thu Dec 21 08:20:00 CST 2017, time=2017-12-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1465096, encodeId=c572146509694, content=<a href='/topic/show?id=2dea8489010' target=_blank style='color:#2F92EE;'>#脑梗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84890, encryptionId=2dea8489010, topicName=脑梗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ccf56689148, createdName=karmond, createdTime=Thu Dec 21 08:20:00 CST 2017, time=2017-12-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=270868, encodeId=f4132e086872, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfBfgWn9nXBgH1sNSiaOAKhsKpN40jDHQKqcRzovau5VibLvREN8uxnu9sKoScBicHSiaDMmbveibFdrBiaD4k4IOPwlG/0, createdBy=b5d11730951, createdName=Jackie Li, createdTime=Wed Dec 20 11:33:39 CST 2017, time=2017-12-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=270676, encodeId=aa7e2e0676ba, content=谢谢分享学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM7GibvIBibibnnnvpajk2stlDF5oichYahI6Bia8uxeTBFoPbdoHWebyXf9eal9FNgUF2lNcrwoZicM3BvQ/0, createdBy=a3742066385, createdName=戒馋,懒,贪, createdTime=Tue Dec 19 18:46:36 CST 2017, time=2017-12-19, status=1, ipAttribution=)]
    2017-12-21 karmond
  3. [GetPortalCommentsPageByObjectIdResponse(id=1259681, encodeId=749f125968182, content=<a href='/topic/show?id=569c9382389' target=_blank style='color:#2F92EE;'>#输血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93823, encryptionId=569c9382389, topicName=输血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ec9955, createdName=windight, createdTime=Thu Dec 21 08:20:00 CST 2017, time=2017-12-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1465096, encodeId=c572146509694, content=<a href='/topic/show?id=2dea8489010' target=_blank style='color:#2F92EE;'>#脑梗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84890, encryptionId=2dea8489010, topicName=脑梗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ccf56689148, createdName=karmond, createdTime=Thu Dec 21 08:20:00 CST 2017, time=2017-12-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=270868, encodeId=f4132e086872, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=84, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfBfgWn9nXBgH1sNSiaOAKhsKpN40jDHQKqcRzovau5VibLvREN8uxnu9sKoScBicHSiaDMmbveibFdrBiaD4k4IOPwlG/0, createdBy=b5d11730951, createdName=Jackie Li, createdTime=Wed Dec 20 11:33:39 CST 2017, time=2017-12-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=270676, encodeId=aa7e2e0676ba, content=谢谢分享学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM7GibvIBibibnnnvpajk2stlDF5oichYahI6Bia8uxeTBFoPbdoHWebyXf9eal9FNgUF2lNcrwoZicM3BvQ/0, createdBy=a3742066385, createdName=戒馋,懒,贪, createdTime=Tue Dec 19 18:46:36 CST 2017, time=2017-12-19, status=1, ipAttribution=)]
    2017-12-20 Jackie Li

    学习

    0

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    2017-12-19 戒馋,懒,贪

    谢谢分享学习了

    0

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