产科超声速记，有技巧！

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                    <ul class=" list-paddingleft-2" style="list-style-type: square;"><li><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;">三血管切面记住一句话“大连柳树气派”就行了！“大”，看血管大小；“连”，看连接是否异常；“柳（流）”，看血流，是否反向，是否混叠？“树（数）”，看血管数目，是3血管，2血管？4血管；“气”，看气管的位置，正常气管分隔动脉和静脉：“派（排）”，看排列，是否是肺动脉，主动脉和SVC的顺序？</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p></li><li><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;">平均内径！！！！！！早孕5.5至9周间，孕囊内径（mm）减去头臀长（mm）小于5，提示流产可能很大；5～7.9,则74％好孩子；大于8，则89.4%好孩子！</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p></li><li><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;">头臀长 CRL测量时限：8~13周+6天，以10~12 周为最佳（即CRL：31~53mm）。12周后胎儿可能屈曲和伸展，使CRL测量准确性下降。经验公式：孕龄（天）=42+CRL（mm）。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p></li><li><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;">孕18-20周后，胎儿脐动脉舒张期血流消失预示着：1）围产期死亡率47%；2）宫内发育迟缓（IUGR）83%；3）畸形率56%；4）剖宫产76%；5）胎儿缺氧84%。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; text-align: center; box-sizing: border-box !important; word-wrap: break-word !important;"><img data-s="300,640" data-type="png" src="http://mmbiz.qpic.cn/mmbiz/dx3KibwtDhvdAoXbfcgxTbh1VqfVA6ibeeU5JsQcZ9VaeZhth9N4gHgOQraJOtoz3TQtQG8cINRL7GJrB8spGshw/0?wx_fmt=png" data-ratio="0.7029177718832891" data-w="377" src="http://mmbiz.qpic.cn/mmbiz/dx3KibwtDhvdAoXbfcgxTbh1VqfVA6ibeeU5JsQcZ9VaeZhth9N4gHgOQraJOtoz3TQtQG8cINRL7GJrB8spGshw/640?wx_fmt=png&amp;tp=webp&amp;wxfrom=5&amp;wx_lazy=1" style="margin: 0px; padding: 0px; box-sizing: border-box !important; word-wrap: break-word !important; width: auto !important; visibility: visible !important;"  /></p></li><li><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;">胎儿心脏畸形法则：1）一侧梗阻造成另一侧血流增加，2）疾病随着孕期进展而逐步明显，例如肺动脉狭窄；3）心脏畸形可合并其他畸形：25-45%合并其他解剖畸形，12-38%合并染色体异常；4）心脏扩大可导致肺发育不良或心室功能异常；5）胎儿右心的病变往往是致命的，仅15-17%能够存活；6）复杂先心预后差。</p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p></li><li><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; box-sizing: border-box !important; word-wrap: break-word !important;">胎儿对解剖畸形的耐受性通常很高。这是因为有母体的支持，让胎儿正常的生理活动能够持续。所以，当胎儿不再能够耐受解剖畸形，通常说明预后很差。例如，畸形引起羊水过多、胸腔和心包腔积液、腹水、水肿等状况，都说明胎儿循环已经不能够适应胎儿的需求。这往往是胎儿静脉回流障碍或心功能不全。</p></li></ul><p style=""><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; font-family: Arial, Verdana, sans-serif; font-size: 14px; line-height: 24px; background-color: rgb(249, 249, 249);">广州市设备维修有限公司</span><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; color: rgb(62, 62, 62); font-size: 12px; line-height: 24px; font-family: Arial, Verdana, sans-serif; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; min-height: 1em; white-space: pre-wrap; color: rgb(62, 62, 62); font-size: 12px; line-height: 24px; 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