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双胎逆転動脈灌流(TRAP・無心体)
一絨毛膜。無心体がポンプ児から逆行灌流。ポンプ児負荷を監視。
根拠:Fetal therapy。各ノードはガイドラインの判断ロジックを要約したものであり、原文の転載ではありません。 医療従事者向けの参考情報であり、臨床判断の代替ではありません。日本の関連学会指針および施設プロトコルを優先してください。
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ステップ 1 · Weight ratio + pump-twin cardiac function
Acardiac/pump twin weight ratio + pump-twin cardiac function?
💡 TRAP occurs only in monochorionic twins. One twin = an acardiac mass (absent/rudimentary heart, absent upper body/head) reverse-perfused by the pump twin through an artery-to-artery anastomosis (Doppler shows reversed flow in the acardiac twin). ~1% of monochorionic. Pump twin at risk of high-output heart failure, polyhydramnios, prematurity, hydrops, growth restriction. First exclude pump-twin chromosomal abnormality.
パス全体像
- 【判断】Weight ratio + pump-twin cardiac functionAcardiac/pump twin weight ratio + pump-twin cardiac function?(TRAP occurs only in monochorionic twins. One twin = an acardiac mass (absent/rudimentary heart, absent upper body/head) reverse-perfused by the pump twin through an artery-to-artery anastomosis (Doppler shows reversed flow in the acardiac twin). ~1% of monochorionic. Pump twin at risk of high-output heart failure, polyhydramnios, prematurity, hydrops, growth restriction. First exclude pump-twin chromosomal abnormality.)
- Acardiac/pump twin weight ratio <70%, pump twin no heart failure → Ratio <70% · expectant weekly follow-up
- Weight ratio >70% or pump-twin heart failure/hydrops/polyhydramnios → Ratio >70%/pump-twin involvement → RFA
- 【終点】Ratio <70% · expectant weekly follow-upTRAP(無心体):ポンプ児の心負荷を監視。適応で無心体血流の凝固・遮断。専門施設管理。
- 【終点】Ratio >70%/pump-twin involvement → RFAWeight ratio >70%またはpump-twin heart failure/hydrops/polyhydramnios: high pump-twin high-output heart failure risk (untreated mortality 50–75%); referへa fetal therapy centerに対しradiofrequency 焼灼/アブレーション (RFA, least invasive)またはcord occlusionへinterrupt the acardiac twin's blood supply (late first/early second trimester)へprotect the pump twin; serial monitoring afterward.
よくある質問
- 双胎逆転動脈灌流(TRAP・無心体)はどの臨床課題を扱う診療パスですか?
- 一絨毛膜。無心体がポンプ児から逆行灌流。ポンプ児負荷を監視。
- 双胎逆転動脈灌流(TRAP・無心体)の主要な意思決定ステップは何ですか?
- Weight ratio + pump-twin cardiac function
- 双胎逆転動脈灌流(TRAP・無心体)はどのような対応方針を示しますか?
- Ratio <70% · expectant weekly follow-up:TRAP(無心体):ポンプ児の心負荷を監視。適応で無心体血流の凝固・遮断。専門施設管理。;Ratio >70%/pump-twin involvement → RFA:Weight ratio >70%またはpump-twin heart failure/hydrops/polyhydramnios: high pump-twin high-output heart failure risk (untreated mortality 50–75%); referへa fetal therapy centerに対しradiofrequency 焼灼/アブレーション (RFA, least invasive)またはcord occlusionへinterrupt the acardiac twin's blood supply (late first/early second trimester)へprotect the pump twin; serial monitoring afterward.
- 双胎逆転動脈灌流(TRAP・無心体)のうち直ちに対応が必要な状況はどれですか?
- Ratio >70%/pump-twin involvement → RFA:Weight ratio >70%またはpump-twin heart failure/hydrops/polyhydramnios: high pump-twin high-output heart failure risk (untreated mortality 50–75%); referへa fetal therapy centerに対しradiofrequency 焼灼/アブレーション (RFA, least invasive)またはcord occlusionへinterrupt the acardiac twin's blood supply (late first/early second trimester)へprotect the pump twin; serial monitoring afterward.
- 双胎逆転動脈灌流(TRAP・無心体)はどのガイドラインに基づいていますか?
- TRAP sequence (acardiac twin) diagnosis and radiofrequency ablation (weight ratio 70%; RFA/cord occlusion) · 準拠:Fetal therapy
出典
- TRAP sequence (acardiac twin) diagnosis and radiofrequency ablation (weight ratio 70%; RFA/cord occlusion)