JP5052888B2 - 射出成形潅流先端電極および射出成形潅流先端電極を備えたカテーテル - Google Patents
射出成形潅流先端電極および射出成形潅流先端電極を備えたカテーテル Download PDFInfo
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Description
本発明は、射出成形多孔質先端電極および射出成形多孔質先端電極を備えたカテーテルに関する。
電極カテーテルは、長い間、医療で一般的に使用されてきた。電極カテーテルは、心臓の電気活性の地図を作成して、異常な電気活性部位をアブレーションするために用いられる。
生理食塩水は、通常は、先端電極またはアブレーション部位を冷却するために潅流カテーテルに用いられるが、生理食塩水自体にエネルギーを供給して、心組織の病変をアブレーションするために用いる。したがって、本発明は、アブレーション機構として生理食塩水を用いる潅流カテーテルおよび多孔質先端電極に関する。
本発明の一実施形態では、図1に示されているように、カテーテル10は、近位端部および遠位端部を有する細長いカテーテル本体12、このカテーテル本体12の遠位端部における先端部分14、およびカテーテル本体12の近位端部における制御ハンドル16を含む。
(1)潅流カテーテルにおいて、
近位端部、および遠位端部を有するカテーテル本体であって、前記カテーテル本体の中を通る少なくとも1つの内腔を有する、カテーテル本体と、
近位端部および遠位端部を有する可撓性チューブのセグメントを含む先端部分であって、前記可撓性チューブのセグメントが、前記先端部分中を通る少なくとも2つの内腔を有し、前記先端部分の前記近位端部が、前記カテーテル本体の前記遠位端部に固着されている、先端部分と、
前記先端部分の前記遠位端部に固着された多孔質先端電極であって、主電極本体、およびステムを含み、少なくとも前記主電極本体が、多孔質材料を含む、多孔質先端電極と、
前記カテーテル本体の中を通る、近位端部、および遠位端部を有する第1の潅流チューブセグメントであって、前記潅流チューブセグメントの前記遠位端部が、前記先端部分の前記近位端部の近傍に固定されている、第1の潅流チューブセグメントと、
近位端部、および遠位端部を有する第2の潅流チューブセグメントであって、前記第2の潅流チューブセグメントの前記近位端部が、前記先端部分の前記遠位端部の近傍に固定されており、前記第2の潅流チューブセグメントの前記遠位端部が、前記先端電極内に固定されており、前記第1の潅流チューブセグメントおよび前記第2の潅流チューブセグメント内を通る流体が、前記先端電極の前記多孔質材料を通って周囲組織に達することができる、第2の潅流チューブセグメントと、
前記第1の潅流チューブセグメントおよび前記第2の潅流チューブセグメント内を通る前記流体にエネルギーを供給するための手段と、
を含む、潅流カテーテル。
(2)実施態様(1)に記載の潅流カテーテルにおいて、
前記流体にエネルギーを供給するための前記手段は、前記第2の潅流チューブセグメントの内面に設けられた内側導電スリーブ、および前記内側導電スリーブに接続された電極リード線を含む、潅流カテーテル。
(3)実施態様(1)に記載の潅流カテーテルにおいて、
前記先端電極の前記ステムは、導電材料を含み、
前記流体にエネルギーを供給するための前記手段は、前記ステムに接続されたリード線を含む、
潅流カテーテル。
(4)実施態様(1)に記載の潅流カテーテルにおいて、
前記多孔質材料は、ポリエチレン、ポリプロピレン、エチレン酢酸ビニル、ポリスチレン、エポキシガラス、フェノールガラス、およびこれらの混合物、からなる群から選択される、潅流カテーテル。
(5)実施態様(1)に記載の潅流カテーテルにおいて、
前記先端電極内に取り付けられた温度検出手段、
をさらに含む、潅流カテーテル。
電磁センサ、
をさらに含む、潅流カテーテル。
(7)実施態様(1)に記載の潅流カテーテルにおいて、
前記先端部分に取り付けられた少なくとも1つのリング電極、
をさらに含む、潅流カテーテル。
(8)実施態様(7)に記載の潅流カテーテルにおいて、
前記少なくとも1つのリング電極に取り付けられた温度検出手段、
をさらに含む、潅流カテーテル。
(9)実施態様(2)に記載の潅流カテーテルにおいて、
前記電極リード線は、前記先端電極の前記ステムの前記スリーブから、前記先端部分の前記チューブと前記ステムとの間の通路を通って前記先端部分の第2の内腔内に延びている、潅流カテーテル。
(10)実施態様(1)に記載の潅流カテーテルにおいて、
前記先端電極は、射出成形される、潅流カテーテル。
近位端部、および遠位端部を有する主電極本体であって、多孔質材料を含む、主電極本体と、
前記主電極本体の近位端部から延びるステムと、
を含む、先端電極。
(12)実施態様(11)に記載の先端電極において、
前記ステムは、前記主電極本体と同じ材料を含む、先端電極。
(13)実施態様(11)に記載の先端電極において、
前記ステムは、導電材料を含む、先端電極。
(14)実施態様(13)に記載の先端電極において、
前記ステムは、多孔質材料でコーティングされている、先端電極。
(15)実施態様(11)に記載の先端電極において、
前記多孔質材料は、ポリエチレン、ポリプロピレン、エチレン酢酸ビニル、ポリスチレン、エポキシガラス、フェノールガラス、およびこれらの混合物、からなる群から選択される、先端電極。
前記先端電極は、射出成形される、先端電極。
(17)実施態様(11)に記載の先端電極を製造する方法において、
多孔質材料をホッパー内に入れるステップと、
前記ホッパーから注入バレル内に前記多孔質材料を送るステップと、
前記注入バレルを加熱して前記多孔質材料を軟化させるステップと、
軟化した前記多孔質材料を、前記注入バレルの端部におけるノズルを通して型の中に押し込むステップと、
前記型内の前記多孔質材料を冷却して前記先端電極を形成するステップと、
前記先端電極を前記型から取り出すステップと、
を含む、方法。
(18)実施態様(17)に記載の方法において、
前記製造方法により、前記先端電極の外面に外皮を生成し、
前記方法は、
前記先端電極から前記外皮の少なくとも一部を機械加工で除去するステップ、
をさらに含む、
方法。
Claims (10)
- 潅流カテーテルにおいて、
近位端部、および遠位端部を有するカテーテル本体であって、前記カテーテル本体の中を通る少なくとも1つの内腔を有する、カテーテル本体と、
近位端部および遠位端部を有する可撓性チューブのセグメントを含む先端部分であって、前記可撓性チューブのセグメントが、前記先端部分中を通る少なくとも2つの内腔を有し、前記先端部分の前記近位端部が、前記カテーテル本体の前記遠位端部に固着されている、先端部分と、
前記先端部分の前記遠位端部に固着された多孔質先端電極であって、主電極本体、およびステムを含み、少なくとも前記主電極本体が、多孔質材料から形成されている、多孔質先端電極と、
前記カテーテル本体の中を通る、近位端部、および遠位端部を有する第1の潅流チューブセグメントであって、前記潅流チューブセグメントの前記遠位端部が、前記先端部分の前記近位端部の近傍に固定されている、第1の潅流チューブセグメントと、
近位端部、および遠位端部を有する第2の潅流チューブセグメントであって、前記第2の潅流チューブセグメントの前記近位端部が、前記先端部分の前記遠位端部の近傍に固定されており、前記第2の潅流チューブセグメントの前記遠位端部が、前記先端電極内に固定されており、前記第1の潅流チューブセグメントおよび前記第2の潅流チューブセグメント内を通る流体が、前記先端電極の前記多孔質材料を通って周囲組織に達することができる、第2の潅流チューブセグメントと、
前記第1の潅流チューブセグメントおよび前記第2の潅流チューブセグメント内を通る前記流体にエネルギーを供給するための手段と、
を含み、
前記多孔質先端電極の前記主電極本体を形成している多孔質材料は、ポリエチレン、ポリプロピレン、エチレン酢酸ビニル、ポリスチレン、エポキシガラス、フェノールガラス、およびこれらの混合物、からなる群から選択される、潅流カテーテル。 - 請求項1に記載の潅流カテーテルにおいて、
前記流体にエネルギーを供給するための前記手段は、前記第2の潅流チューブセグメントの内面に設けられた内側導電スリーブ、および前記内側導電スリーブに接続された電極リード線を含む、潅流カテーテル。 - 請求項1に記載の潅流カテーテルにおいて、
前記先端電極の前記ステムは、導電材料を含み、
前記流体にエネルギーを供給するための前記手段は、前記ステムに接続されたリード線を含む、
潅流カテーテル。 - 請求項1に記載の潅流カテーテルにおいて、
前記先端電極内に取り付けられた温度検出手段、
をさらに含む、潅流カテーテル。 - 請求項1に記載の潅流カテーテルにおいて、
電磁センサ、
をさらに含む、潅流カテーテル。 - 請求項1に記載の潅流カテーテルにおいて、
前記先端部分に取り付けられた少なくとも1つのリング電極、
をさらに含む、潅流カテーテル。 - 請求項6に記載の潅流カテーテルにおいて、
前記少なくとも1つのリング電極に取り付けられた温度検出手段、
をさらに含む、潅流カテーテル。 - 請求項2に記載の潅流カテーテルにおいて、
前記電極リード線は、前記先端電極の前記ステムの前記スリーブから、前記先端部分の前記チューブと前記ステムとの間の通路を通って前記先端部分の第2の内腔内に延びている、潅流カテーテル。 - 請求項1に記載の潅流カテーテルにおいて、
前記先端電極は、射出成形される、潅流カテーテル。 - カテーテルのための先端電極において、
近位端部、および遠位端部を有する主電極本体であって、多孔質材料から形成されている、主電極本体と、
前記主電極本体の近位端部から延びるステムと、
を含み、
前記主電極本体を形成している多孔質材料は、ポリエチレン、ポリプロピレン、エチレン酢酸ビニル、ポリスチレン、エポキシガラス、フェノールガラス、およびこれらの混合物、からなる群から選択される、先端電極。
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