胎兒超聲檢查正常值2.5

1、美中宜和婦兒醫(yī)院超聲檢查手冊(cè)美中宜和婦兒醫(yī)院超聲檢查手冊(cè)一、正常早孕期一、正常早孕期1.孕齡計(jì)算公式孕天數(shù)=胎囊平均內(nèi)徑（長(zhǎng)寬厚）3（mm）303天2.孕齡計(jì)算公式孕天數(shù)=孕囊最大經(jīng)線3天此兩個(gè)測(cè)量公式適用于孕7周之內(nèi)，但有一定誤差。3.孕齡（天）=CRL424.孕齡（周）=CRL6.5此兩公式適用于孕712周。測(cè)量時(shí)不包括卵黃囊及肢體，取胚胎軀體最長(zhǎng)最直的正中矢面圖，測(cè)量最長(zhǎng)經(jīng)線，最好取三次測(cè)量平均值。5.胎囊每日生長(zhǎng)速度：11.5m

2、md6.正常早中期超聲孕周可見孕周胚胎大小mm正常超聲所見5可見小胎囊及卵黃囊，胎囊約占宮腔1463.2胎囊清晰可見，可見卵黃囊、胎芽及胎心79.3清楚可見胎芽、胎心，胎囊約占宮腔13815.7可區(qū)分胎頭、胎體，胎囊約占宮腔12，可見蠕動(dòng)922.6胎囊?guī)缀跽紳M宮腔，胚胎輪廓清晰，胎頭、腦泡及肢芽可見1030.7胚胎肢芽清晰可見，活躍于羊水中，胎盤開始形成1140.6胎囊完全消失，胎盤清晰可見，四肢骨，指趾清晰可見1252.8胎兒顱骨光環(huán)

3、清晰，脊柱及四腔心可見簡(jiǎn)單記憶：5囊6芽7心8動(dòng)9胎盤7.胎兒停止發(fā)育胎囊平均內(nèi)徑≥2.5cm，未見胎芽或胎芽長(zhǎng)≥0.6cm，未見胎心搏動(dòng)。注意：觀察胎心搏動(dòng)要在2分鐘以上8.胎兒妊娠結(jié)局不良（1）孕囊平均內(nèi)徑CRL＜5mm（2）孕早期胎心率＜80bpm9.胎兒NT增厚測(cè)量范圍：頭臀長(zhǎng)44mm85mm相當(dāng)于孕11周2天14周3天正常NT≦3.0mm50%的21三體，25%的18三體及10%的turner綜合癥NT或NF增厚對(duì)于高齡孕婦（

4、年齡大于35歲），唐氏高危者，孕1112周，NT≥2.5mm，考慮增寬。二、產(chǎn)前篩查（孕二、產(chǎn)前篩查（孕1114周）要求周）要求測(cè)量胎兒頭臀長(zhǎng)并估計(jì)孕周胎兒矢狀面測(cè)量NT厚度和鼻骨的顯示胎兒側(cè)腦室顯示顯示胎兒心臟、胃泡顯示胎兒四肢此期可篩查出的畸形：無(wú)腦兒、全前腦、腦膨出、四肢異常、NT增厚如果檢查胎兒NT增厚，注意胎兒鼻骨有無(wú)缺失或過(guò)短，有無(wú)三尖瓣反流。NT增厚應(yīng)建議做羊穿檢查。天10周3天3.4511周3天4.5512周3天5.85

5、13周3天7.1514周3天8.4510周4天3.5511周4天4.6512周4天5.9513周4天7.3514周4天8.5510周5天3.7511周5天4.8512周5天6.2513周5天7.5514周5天8.7510周6天3.8511周6天5.0512周6天6.3513周6天7.6514周6天8.852、正常胎兒雙頂徑、、正常胎兒雙頂徑、頭圍、腹圍、股骨長(zhǎng)頭圍、腹圍、股骨長(zhǎng)（medison）孕周雙頂徑頭圍腹圍股骨長(zhǎng)131.902.3

6、47.28.86.37.41.001.33142.352.748.910.407.58.61.341.66152.783.1710.4511.958.79.81.671.99163.183.5511.9613.49.911.02.002.30173.563.9113.4514.7911.112.22.312.59183.924.2614.816.1912.313.42.612.90194.274.6016.217.3913.514.62

7、.913.19204.614.9317.4018.5914.715.73.203.46214.955.2418.6019.7515.816.93.473.74225.255.5419.7620.8417.018.03.754.00235.555.8420.8521.8918.119.14.014.26245.856.1421.9022.8919.220.34.274.49256.156.4122.9023.8920.421.44.504

8、.74266.426.6823.9024.8021.522.54.754.99276.696.9424.8125.6922.623.65.005.25286.957.2025.7026.5923.724.75.265.47297.217.4626.6027.4024.825.75.485.69307.477.6927.4028.1925.826.85.705.94317.707.9528.2028.9026.927.85.956.153

9、27.968.1929.0029.7027.928.96.166.36338.208.4229.8030.4929.030.06.376.59348.438.6530.6031.2030.130.96.606.79358.668.8831.3031.8031.032.06.807.00368.899.1031.9032.5932.133.07.017.20379.119.3232.6033.2033.134.07.217.40389.3