BMJ:肺栓塞诊断预测:Wells模型性能更佳

2015-10-04 MedSci MedSci原创

荷兰一项研究表明,5种易在初级保健机构中应用的肺栓塞诊断预测模型效率相当,但韦尔斯(Wells)模型因失败率较低而性能表现最佳。论文9月8日在线发表于《英国医学杂志》(BMJ)。这项结果与此前另一项研究结果相似:BMJ:Wells评分结合D-二聚体检测有效排除深静脉血栓  该研究先通过系统评价后再进行独立外部验证,对易于在初级保健机构应用的所有排除肺栓塞诊断预测模型进行评估。所

该研究先通过系统评价后再进行独立外部验证,对易于在初级保健机构应用的所有排除肺栓塞诊断预测模型进行评估。所有模型均通过系统文献检索得到,并通过计算和比较C统计值来评估其鉴别能力。依据联合定性D-二聚体检测的预设模型阈值,将598例疑似急性肺栓塞患者分层为肺栓塞高和低概率组,并计算所有模型的敏感性、特异性、效率(肺栓塞低概率患者的总体比例)和失败率(肺栓塞低概率患者组中肺栓塞病例比例)。

各个预测模型的对比表:

Models compared (model 1 v model 2) C statistic Estimated difference (95% CI) P value
Model 1 Model 2
Original Wells v simplified Wells 0.801 0.787 0.014 (−0.004 to 0.032) 0.132
Original Wells v modified Wells 0.801 0.798 0.003 (−0.001 to 0.007) 0.114
Original Wells v original revised Geneva 0.801 0.756 0.045 (−0.007 to 0.097) 0.091
Original Wells v simplified revised Geneva 0.801 0.748 0.053 (0.003 to 0.103) 0.038
Simplified Wells v modified Wells 0.787 0.798 −0.011 (−0.028 to 0.006) 0.203
Simplified Wells v original revised Geneva 0.787 0.756 0.031 (−0.017 to 0.079) 0.207
Simplified Wells v simplified revised Geneva 0.787 0.748 0.039 (−0.005 to 0.083) 0.084
Modified Wells v original revised Geneva 0.798 0.756 0.043 (−0.010 to 0.096) 0.113
Modified Wells v simplified revised Geneva 0.798 0.748 0.050 (0.000 to 0.100) 0.048
Original revised Geneva v simplified revised Geneva 0.756 0.748 0.008 (−0.010 to 0.026) 0.388

结果显示,共发现用于肺栓塞诊断的10种预测模型,其中5种模型可在初级保健机构数据集中加以验证,分别为原始Wells、改良Wells、简化Wells、修订Geneva和简化修订Geneva模型。所有模型的鉴别能力相当。敏感性介于88%(简化修订Geneva)至96%(简化Wells)之间,特异性介于48%(修订Geneva)至53%(简化修订Geneva)之间。所有模型的效率为43%~48%。失败率之间存在差异,在简化Wells和简化修订Geneva模型之间尤为显著(失败率分别1.2%和3.1%)。不考虑所用诊断预测模型时,有3例患者被错误分类为肺栓塞低概率;肺栓塞只有在转诊至二级医疗机构后才得以诊断

原始出处:

Hendriksen JM, Geersing GJ, Lucassen WA, Erkens PM, Stoffers HE, van Weert HC, Büller HR, Hoes AW, Moons KG.Diagnostic prediction models for suspected pulmonary embolism: systematic review and independent external validation in primary care. BMJ. 2015 Sep 8;351:h4438. doi: 10.1136/bmj.h4438.

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  1. [GetPortalCommentsPageByObjectIdResponse(id=1847718, encodeId=ddac184e718f1, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Wed Aug 17 03:36:00 CST 2016, time=2016-08-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=49588, encodeId=14f349588ed, content=好学习很值得, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Dec 27 20:18:00 CST 2015, time=2015-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37825, encodeId=8cd63e82563, content=D-Dimer阴性可以除外肺栓塞, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9daf1619121, createdName=Keren1970, createdTime=Wed Oct 07 10:24:00 CST 2015, time=2015-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37751, encodeId=d41a3e7516c, content=临床上D-二聚体很敏感, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a1a01625167, createdName=zhouxue1990, createdTime=Tue Oct 06 19:38:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37694, encodeId=37b33e694d9, content=经典模型最靠谱, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Mon Oct 05 08:02:00 CST 2015, time=2015-10-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37684, encodeId=2c253e684eb, content=还是经典的好, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Sun Oct 04 11:15:00 CST 2015, time=2015-10-04, status=1, ipAttribution=)]
    2016-08-17 gaoxiaoe
  2. [GetPortalCommentsPageByObjectIdResponse(id=1847718, encodeId=ddac184e718f1, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Wed Aug 17 03:36:00 CST 2016, time=2016-08-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=49588, encodeId=14f349588ed, content=好学习很值得, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Dec 27 20:18:00 CST 2015, time=2015-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37825, encodeId=8cd63e82563, content=D-Dimer阴性可以除外肺栓塞, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9daf1619121, createdName=Keren1970, createdTime=Wed Oct 07 10:24:00 CST 2015, time=2015-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37751, encodeId=d41a3e7516c, content=临床上D-二聚体很敏感, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a1a01625167, createdName=zhouxue1990, createdTime=Tue Oct 06 19:38:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37694, encodeId=37b33e694d9, content=经典模型最靠谱, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Mon Oct 05 08:02:00 CST 2015, time=2015-10-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37684, encodeId=2c253e684eb, content=还是经典的好, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Sun Oct 04 11:15:00 CST 2015, time=2015-10-04, status=1, ipAttribution=)]
    2015-12-27 忠诚向上

    好学习很值得

    0

  3. [GetPortalCommentsPageByObjectIdResponse(id=1847718, encodeId=ddac184e718f1, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Wed Aug 17 03:36:00 CST 2016, time=2016-08-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=49588, encodeId=14f349588ed, content=好学习很值得, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Dec 27 20:18:00 CST 2015, time=2015-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37825, encodeId=8cd63e82563, content=D-Dimer阴性可以除外肺栓塞, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9daf1619121, createdName=Keren1970, createdTime=Wed Oct 07 10:24:00 CST 2015, time=2015-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37751, encodeId=d41a3e7516c, content=临床上D-二聚体很敏感, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a1a01625167, createdName=zhouxue1990, createdTime=Tue Oct 06 19:38:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37694, encodeId=37b33e694d9, content=经典模型最靠谱, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Mon Oct 05 08:02:00 CST 2015, time=2015-10-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37684, encodeId=2c253e684eb, content=还是经典的好, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Sun Oct 04 11:15:00 CST 2015, time=2015-10-04, status=1, ipAttribution=)]
    2015-10-07 Keren1970

    D-Dimer阴性可以除外肺栓塞

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1847718, encodeId=ddac184e718f1, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Wed Aug 17 03:36:00 CST 2016, time=2016-08-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=49588, encodeId=14f349588ed, content=好学习很值得, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Dec 27 20:18:00 CST 2015, time=2015-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37825, encodeId=8cd63e82563, content=D-Dimer阴性可以除外肺栓塞, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9daf1619121, createdName=Keren1970, createdTime=Wed Oct 07 10:24:00 CST 2015, time=2015-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37751, encodeId=d41a3e7516c, content=临床上D-二聚体很敏感, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a1a01625167, createdName=zhouxue1990, createdTime=Tue Oct 06 19:38:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37694, encodeId=37b33e694d9, content=经典模型最靠谱, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Mon Oct 05 08:02:00 CST 2015, time=2015-10-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37684, encodeId=2c253e684eb, content=还是经典的好, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Sun Oct 04 11:15:00 CST 2015, time=2015-10-04, status=1, ipAttribution=)]
    2015-10-06 zhouxue1990

    临床上D-二聚体很敏感

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1847718, encodeId=ddac184e718f1, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Wed Aug 17 03:36:00 CST 2016, time=2016-08-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=49588, encodeId=14f349588ed, content=好学习很值得, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Dec 27 20:18:00 CST 2015, time=2015-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37825, encodeId=8cd63e82563, content=D-Dimer阴性可以除外肺栓塞, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9daf1619121, createdName=Keren1970, createdTime=Wed Oct 07 10:24:00 CST 2015, time=2015-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37751, encodeId=d41a3e7516c, content=临床上D-二聚体很敏感, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a1a01625167, createdName=zhouxue1990, createdTime=Tue Oct 06 19:38:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37694, encodeId=37b33e694d9, content=经典模型最靠谱, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Mon Oct 05 08:02:00 CST 2015, time=2015-10-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37684, encodeId=2c253e684eb, content=还是经典的好, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Sun Oct 04 11:15:00 CST 2015, time=2015-10-04, status=1, ipAttribution=)]
    2015-10-05 lovetcm

    经典模型最靠谱

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1847718, encodeId=ddac184e718f1, content=<a href='/topic/show?id=2977356edc' target=_blank style='color:#2F92EE;'>#BMJ#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3567, encryptionId=2977356edc, topicName=BMJ)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=148754, createdName=gaoxiaoe, createdTime=Wed Aug 17 03:36:00 CST 2016, time=2016-08-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=49588, encodeId=14f349588ed, content=好学习很值得, beContent=null, objectType=article, channel=null, level=null, likeNumber=120, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Sun Dec 27 20:18:00 CST 2015, time=2015-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37825, encodeId=8cd63e82563, content=D-Dimer阴性可以除外肺栓塞, beContent=null, objectType=article, channel=null, level=null, likeNumber=133, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=9daf1619121, createdName=Keren1970, createdTime=Wed Oct 07 10:24:00 CST 2015, time=2015-10-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37751, encodeId=d41a3e7516c, content=临床上D-二聚体很敏感, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a1a01625167, createdName=zhouxue1990, createdTime=Tue Oct 06 19:38:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37694, encodeId=37b33e694d9, content=经典模型最靠谱, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Mon Oct 05 08:02:00 CST 2015, time=2015-10-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=37684, encodeId=2c253e684eb, content=还是经典的好, beContent=null, objectType=article, channel=null, level=null, likeNumber=134, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=96871613250, createdName=medcardio, createdTime=Sun Oct 04 11:15:00 CST 2015, time=2015-10-04, status=1, ipAttribution=)]
    2015-10-04 medcardio

    还是经典的好

    0

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新的肺栓塞威廉亚洲博彩公司 指出过度应用CT成像和血浆D-二聚检查诊断肺栓塞,可能弊大于利。9月29号,ACP在Annals of Internal Medicine杂志上发表肺栓塞最新威廉亚洲博彩公司 。血浆D二聚体检查可能适用于那些发生肺栓塞中等风险的患者,不适用与低风险患者。波士顿马萨诸塞州综合医院急诊科的副主任Ali S. Raja和ACP临床威廉亚洲博彩公司 协会的同事写道:尽管评估住院,出院以及急诊患者发生肺栓塞,CT检查应用

肺栓塞(PE)Well评分公式

肺栓塞(PE)Well评分公式

J Thromb Thrombolysis:老年肺栓塞患者溶栓治疗的安全性和有效性

肺栓塞(PE)是心血管疾病死亡的主要原因。溶栓治疗可降低死亡率,尤其是在高危病人中。在老年肺栓塞(PE)患者(>65岁)中,溶栓治疗可能是未得到充分利用,导致出血并发症的发病风险。在这项研究中,williamhill asia 旨在评估老年栓塞(PE)患者溶栓治疗的安全性和有效性。 在这项回顾性研究中,收纳了363名入院治疗的肺栓塞(PE)患者,205名患者被分到实验组,158名患者被分到对照组。根据患者的年龄和治疗策

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肺栓塞的PERC判定原则公式

肺栓塞的PERC判定原则公式

Eur J Nucl Med Mol Imaging.:V/P SPECT用于疑是肺栓塞孕妇的检查

Bajc M等人进行了一项研究,目的是评估疑是肺栓塞孕妇中肺栓塞(PE)和其他肺部疾病的患病率,同时计算该人群孕妇和胎儿的辐射量。其次该研究还有一个目的,评估正常通气/灌注单光子发射计算机断层扫描(V/P SPECT)该方法对孕妇进行检查的阴性预测值。该研究在5年的时间内,对127名怀疑PE的孕妇进行了V/P SPECT检查。研究者评估了该方法对孕妇和胎儿的辐射量辐射暴露量,以及V/P SPECT