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<title>大排畸什么时候做?能看出什么?</title>
<!-- 孕期专题 · 孕期产检 · 大排畸(孕期首页「其他妈妈也在搜」→ 查看全部)。2026-11-01 用户:剩下的问题都做成专题页,UI 和文字参考 topic/buji。
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<script>window.TOPIC = {
"slug": "paiji",
"q": "大排畸什么时候做?能看出什么?",
"eyebrow": "孕期产检 · 大排畸",
"title": [
"大排畸",
"\n",
"什么时候做",
"?能看出什么?"
],
"sub": "一张卡看懂:几周做、看什么、看不出什么",
"answer": "孕 <em>20~24 周<\/em>做,重点筛宝宝<em>身体结构<\/em>有没有严重畸形。",
"three": [
{
"b": "20~24 周做",
"s": "太早看不清,太晚宝宝大了不好看全"
},
{
"b": "不用空腹憋尿",
"s": "正常吃饭,穿宽松好撩的衣服"
},
{
"b": "查结构不查染色体",
"s": "和唐筛、无创互相不能替代"
}
],
"sections": [
{
"type": "cards",
"title": "做之前先知道",
"en": "AT A GLANCE",
"key": "时间卡准,其余照常就好。",
"tint": true,
"items": [
{
"name": "什么时候",
"verdict": "要卡准",
"must": true,
"label": "孕周",
"amt": "20~24",
"unit": "周",
"when": "提前按医院要求预约"
},
{
"name": "空腹吗",
"verdict": "不用",
"must": false,
"label": "吃饭",
"amt": "照常",
"unit": "",
"when": "别饿着,宝宝更爱动"
},
{
"name": "憋尿吗",
"verdict": "一般不用",
"must": false,
"label": "膀胱",
"amt": "不用",
"unit": "",
"when": "以医院通知为准"
},
{
"name": "没看全",
"verdict": "常见",
"must": false,
"label": "处理",
"amt": "复查",
"unit": "",
"when": "走一走、换个姿势再查"
}
],
"why": {
"q": "为什么非得 20~24 周?",
"a": "这时宝宝器官基本长好,羊水也多,B 超最容易看清;再往后宝宝变大、骨头变硬,有些部位会被挡住,看不全。"
}
},
{
"type": "list",
"title": "能看出什么",
"en": "WHAT IT SHOWS",
"key": "看的是器官长没长全、位置对不对。",
"tint": false,
"items": [
{
"tag": "能看",
"tone": "ok",
"b": "头颅、大脑、脊柱",
"s": "无脑儿、严重开放性脊柱裂这类要重点排除"
},
{
"tag": "能看",
"tone": "ok",
"b": "心脏、腹壁、内脏",
"s": "心脏四个腔、胃、肾、膀胱、腹壁是否完整"
},
{
"tag": "能看",
"tone": "ok",
"b": "面部、四肢",
"s": "唇部、四肢长骨,还会量大小看发育"
},
{
"tag": "顺便看",
"tone": "ok",
"b": "胎盘、羊水、脐带",
"s": "胎盘位置、羊水多少、脐带血管数"
},
{
"tag": "看不出",
"tone": "no",
"b": "染色体问题",
"s": "唐氏等要靠唐筛、无创或产前诊断"
},
{
"tag": "看不出",
"tone": "no",
"b": "听力、视力、智力",
"s": "小的或功能性问题,B 超看不到"
}
]
},
{
"type": "timeline",
"title": "它在产检里的位置",
"en": "TIMELINE",
"key": "早期筛染色体,20 周后查结构。",
"tint": true,
"cols": [
"11~13+6周",
"15~20周",
"20~24周",
"30~32周"
],
"weeks": [
[
0,
15
],
[
15,
20
],
[
20,
28
],
[
28,
42
]
],
"rows": [
{
"name": "超声",
"bars": [
{
"t": "NT 检查",
"span": 1,
"cls": "lt"
},
{
"t": "按需",
"span": 1,
"cls": "dash"
},
{
"t": "大排畸",
"span": 1,
"cls": ""
},
{
"t": "晚孕超声",
"span": 1,
"cls": "lt"
}
]
},
{
"name": "染色体",
"bars": [
{
"t": "早期筛查",
"span": 1,
"cls": "lt"
},
{
"t": "唐筛/无创",
"span": 1,
"cls": ""
},
{
"t": "异常再诊断",
"span": 2,
"cls": "dash"
}
]
},
{
"name": "看重点",
"bars": [
{
"t": "NT 厚度",
"span": 1,
"cls": "lt"
},
{
"t": "染色体风险",
"span": 1,
"cls": "lt"
},
{
"t": "结构畸形",
"span": 1,
"cls": ""
},
{
"t": "生长胎位",
"span": 1,
"cls": "lt"
}
]
}
],
"tips": [
"NT 别错过时间窗",
"唐筛无创二选一听医生",
"这周该约大排畸了",
"查生长、羊水、胎位"
],
"legend": [
[
"",
"重点"
],
[
"lt",
"日常"
],
[
"dash",
"听医生"
]
]
},
{
"type": "vs",
"title": "大排畸和唐筛",
"en": "SCAN VS BLOOD",
"key": "一个查结构,一个查染色体。",
"tint": false,
"heads": [
"大排畸",
"唐筛 / 无创"
],
"rows": [
{
"name": "查什么",
"a": "身体结构有没有畸形",
"b": "染色体异常的风险",
"win": -1
},
{
"name": "怎么做",
"a": "肚子上做 B 超",
"b": "抽妈妈的血",
"win": -1
},
{
"name": "几周",
"a": "20~24 周",
"b": "唐筛 15~20 周",
"win": -1
},
{
"name": "结果",
"a": "看见什么写什么",
"b": "高风险要做诊断",
"win": -1
}
],
"note": "两项互相不能替代,都按医生安排做。"
},
{
"type": "doc",
"title": "报告这样写要复诊",
"en": "SEE A DOCTOR",
"key": "有提示不等于有问题,听医生解读。",
"tint": true,
"b": "这些情况,带报告问医生",
"s": "很多是「暂时看不清」,复查就清楚了。",
"tags": [
"显示不清需复查",
"建议心脏超声",
"脑室偏宽",
"肾盂分离",
"单脐动脉",
"羊水过多或过少",
"胎盘位置低",
"建议遗传咨询"
]
}
],
"tools": {
"title": "排畸前后用得上的工具",
"items": [
{
"id": "chanjianrili",
"why": "按孕周提醒约大排畸",
"btn": "去看"
},
{
"id": "taierguzhong",
"why": "报告数据算算估重",
"btn": "去算"
},
{
"id": "yundujinian",
"why": "存下宝宝的 B 超照",
"btn": "去存"
}
]
},
"sources": [
"中华医学会妇产科学分会《孕前和孕期保健指南(2018)》:妊娠 20~24 周进行胎儿系统超声筛查,筛查胎儿严重畸形;妊娠 11~13+6 周超声测量 NT;15~20 周血清学筛查;30~32 周超声评估胎儿生长、羊水、胎位、胎盘",
"中国医师协会超声医师分会《产前超声检查指南(2012)》:系统产前超声检查(Ⅲ级)应筛查无脑儿、严重脑膨出、严重开放性脊柱裂、严重胸腹壁缺损伴内脏外翻、单腔心、致死性软骨发育不全等严重畸形;超声不能发现所有畸形",
"国家卫生计生委《孕妇外周血胎儿游离 DNA 产前筛查与诊断技术规范》(2016):适宜孕周 12~22+6 周;筛查高风险须行产前诊断",
"胎儿体位、羊水量、孕妇腹壁厚度等会影响超声显示,部分结构显示不清时需复查"
],
"heroAlt": "孕妈妈躺在 B 超检查床上,看着屏幕上的宝宝",
"color": [
"#2E7CF6",
"46,124,246",
"#EAF2FF"
]
};</script>
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