まとめ
胸内静脈弁は,部静脈と下静脈の静脈と同様に,典型的には有能である. この弁の機能は,心臓肺蘇生などの高胸内圧イベントの際に血流を維持するために不可欠です.
科学分野:
- 心血管生理学 心血管の生理学
- 静脈弁の機能について
- 胸腔インレット解剖学 胸腔インレット解剖学
背景:
- 胸腔の入口静脈弁の能力は,静脈の戻りを維持するために非常に重要です.
- 中枢静脈圧の上昇は,静脈弁の機能不全と関連することがあります.
- 生理学的ストレス中にこれらの弁の役割は完全に理解されていません.
研究 の 目的:
- 人間における内静脈弁の機能と犬における外静脈弁の機能を調査する.
- 中枢静脈圧力の異なる条件下で胸腔入口静脈弁の能力を評価する.
- 胸内圧力が増加した時の血液動力学的安定性におけるこれらの弁の潜在的な役割を決定する.
主な方法:
- 右内静脈弁の機能を評価するために32人の患者で心臓キャセテリゼーションを行いました.
- 13匹の犬による外側動脈弁のインビトロ研究.
- 咳が誘発するマニュバルや静的/脈動的圧力チャレンジ中のトランスバルブラー圧力グラデーションの測定.
主要な成果:
- 中枢静脈圧が正常な患者は,内側動脈弁が有能であることを示した.
- 中枢静脈圧が上昇した15人のうち10人の患者で,特に重度の三回吐き症の患者で,無能または欠席した弁が観察されました.
- 切断された犬弁は,有意な静的および脈動的圧力下での能力を示した.
結論:
- 胸腔内静脈弁は,胸腔内圧力の突然の上昇の間,一般的に適任です.
- これらの弁は,心肺蘇生中に前向きの血流に不可欠な胸外動脈動脈圧グラデントに寄与する可能性があります.
- 静脈弁の整合性は,高い胸内圧の条件下で血液動力学的機能を維持するために重要です.
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