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コラー・ドップラー再発性特性は,正常な機械的なミトラ弁義肢の in vitro の特徴である
H Baumgartner1, S Khan, M DeRobertis
1Division of Cardiology and Cardiovascular Surgery, Cedars-Sinai Medical Center, Los Angeles, Calif.
Circulation
|January 1, 1992
まとめ
普通のセント・ジュード (SJ) とメドトロニック・ホール (MH) のミトラル弁は,カラー・ドップラーで複雑な再発ジェットを示しているが,流量量は最小である. これらの正常なパターンを認識することは,義肢弁の病理的な嘔吐を誤診することを避けるために非常に重要です.
科学分野:
- 心血管研究に関する研究です.
- 医療機器工学 医療機器工学とは
- 診断用画像検査について
背景:
- セント・ジュード (SJ) とメドトロニック・ホール (MH) のミトラ弁の正常な再発性特性を評価.
- 各バルブタイプの4つのサイズ (25~31mm) が使用されました.
研究 の 目的:
- セント・ジュード (SJ) とメドトロニック・ホール (MH) の人工ミトラル弁の正常な流出パターンを特徴付けるため.
- カラードップラー画像を用いて,正常な排泄と病的な排泄を区別する.
主な方法:
- SJとMHのミトラ弁 (それぞれ4つのサイズ) を,脈動性フローモデルで研究した.
- 流量計を使用して,左心室の圧力 (80,130,180 mm Hg) を変化させることで,再発性流量を測定した.
- 6つの回転平面でカラードップラーを用いて再発するジェットをイメージし,円形の穴と比較した.
主要な成果:
- SJ (6.2-12.7cm3/秒) とMH (7.9-17.5cm3/秒) のバルブでは,再発性フロー率が変化した.
- 計算された吐孔面積は1.6-2.0mm2 (SJ) と2.2-2.9mm2 (MH) の範囲であった.
- カラー・ドップラーは,異なるジェットパターンを明らかにした:SJバルブには複数の収束ジェットがあり,MHバルブは周辺ジェットと大きな中央ジェットを示した.
結論:
- 正常なSJとMHの弁は,病理的な排泄と区別できる,最小の容量を持つ複雑な排泄ジェットを示します.
- 特徴的なジェットパターンとアリアージング距離は,SJバルブ,MHバルブ,および単純な円形孔の間で異なります.
- 長いアリアジングを持つ中央ジェットのみに基づいてMHバルブを取り除くのは避けましょう;アリアジングが最小であれば,MHの周辺ジェットとSJバルブのすべてのジェットは正常です.
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