JP7305541B2 - 2次元可視化における多重電極識別及び配向のための識別可能な電極を有する灌注電気生理学的カテーテル - Google Patents
2次元可視化における多重電極識別及び配向のための識別可能な電極を有する灌注電気生理学的カテーテル Download PDFInfo
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Description
機能不全の心臓を治療するための心組織のアブレーションは、かかる治療を実施するための周知の処置である。典型的には、アブレーションを成功させるために、心筋の多様な場所で心臓の電極電位を測定する必要がある。更に、アブレーション中の温度測定により、アブレーションの有効性を測定することができるデータがもたらされる。典型的には、アブレーション処置に対して、実際のアブレーション前、アブレーション中、及びアブレーション後に、電極電位及び温度が測定される。
図1は、実施形態による、装置12を用いた侵襲性医療処置の概略図である。この処置は、医療専門家14により行われ、一例として、本明細書の以下の説明における処置は、ヒト患者18の心臓の心筋16の一部のアブレーションを含むと仮定される。但し、本明細書に開示される実施形態は、この特定の処置にだけ適用可能であるわけではなく、生物学的組織又は非生物学的材料に対する実質的に如何なる処置も含み得ることが理解される。
X線に対して不透明である材料から作製された放射線不透過性マーカーは、診断/治療用カテーテル24の可視化、及びX線透視処置中のその電極33の位置を支援するために、診断/治療用カテーテル24に組み込むことができる。X線透視画像は2次元であり、診断/治療用カテーテル24の部分及び診断/治療用カテーテル24が電極33によってアブレーションすることを意図する心臓解剖学的構造は、3次元物体である。したがって、心臓内に配備された診断/治療用カテーテル24を反映するX線透視画像は、視覚的に曖昧、すなわち双安定であり得、これにより、ユーザ(例えば、外科医)が、電極33及び各個々の電極33がどのように心臓組織に接触するかを区別することが困難になり得る。放射線不透過性マーカー(例えば、図5A、8A、及び8Bの602、604、606)は、様々な接触電極33及びそれらがどのように組織に接触するかを区別するユーザの能力を支援することができる。図5Bは、図5Aの基材30(これは放射線不透過性マーカー、例えば、602、604、及び606を組み込む)を備えた診断/治療用カテーテル24のバルーン80が、バルーン80が被験者内に配備及び拡張されたときに捕捉されたX線透視画像内でどのように見え得るかを示す概略図である。
(1) 電気生理学的カテーテルであって、
膜を有するバルーンであって、長手方向軸を画定する遠位端及び近位端を有する、バルーンと、
前記膜上に配置された第1の基材であって、前記第1の基材上に配置された第1の形態の第1の放射線不透過性マーカーを含む、第1の基材と、
前記膜上に配置された第2の基材であって、前記第2の基材が、前記第2の基材上に配置された第2の形態の第2の放射線不透過性マーカーを含み、前記第2の形態が前記第1の形態とは異なる、第2の基材と、を備える、電気生理学的カテーテル。
(2) 前記第1の形態が第1の多角形を含み、前記第2の形態が第2の多角形を含む、実施態様1に記載の電気生理学的カテーテル。
(3) 前記第1の多角形が矩形を含み、前記第2の多角形が三角形を含む、実施態様2に記載の電気生理学的カテーテル。
(4) 前記第2の多角形が白抜き(hollow)である、実施態様2に記載の電気生理学的カテーテル。
(5) 前記第2の多角形が塗りつぶされている(solid)、実施態様2に記載の電気生理学的カテーテル。
(7) 前記第2の多角形が矢尻形を含む、実施態様6に記載の電気生理学的カテーテル。
(8) 前記第2の多角形が第3の基材の方を向いている、実施態様7に記載の電気生理学的カテーテル。
(9) 前記第3の基材が、前記第3の基材上に配置された第3の形態の第3の放射線不透過性マーカーを含み、前記第3の形態は前記第1の形態及び前記第2の形態とは異なる、実施態様8に記載の電気生理学的カテーテル。
(10) 前記第3の形態が、第3の多角形を含む、実施態様9に記載の電気生理学的カテーテル。
(12) 前記第3の多角形が塗りつぶされている、実施態様10に記載の電気生理学的カテーテル。
(13) 前記第3の多角形が白抜きである、実施態様10に記載の電気生理学的カテーテル。
(14) 前記第3の多角形が、前記バルーンの前記長手方向軸に平行な中心線に対して非対称である、実施態様10に記載の電気生理学的カテーテル。
(15) 前記第3の多角形が矢尻形を含む、実施態様14に記載の電気生理学的カテーテル。
(17) 前記第1の基材、第2の基材、第3の基材、及び最終基材が、前記膜の周囲に円周方向に配置され、前記最終基材が、前記膜上で前記第3の基材と前記第1の基材との間に配置されている、実施態様16に記載の電気生理学的カテーテル。
(18) 少なくとも第4の基材が、前記第1の基材と前記第2の基材との間に配置され、少なくとも第5の基材が、前記第2の基材と前記第3の基材との間に配置されている、実施態様17に記載の電気生理学的カテーテル。
(19) 前記第4の基材が放射線不透過性マーカーを欠き、第5の基材が放射線不透過性マーカーを欠く、実施態様18に記載の電気生理学的カテーテル。
(20) 食道、横隔神経、又は肺に近接する被験者の心臓の左心房内の組織にエネルギーを印加する方法であって、
前記左心房に近接して拡張可能な部材を位置付ける工程であって、前記拡張可能な部材は、長手方向軸を有し、前記長手方向軸の周りに配置された複数の電極を含み、各電極は独立して通電されることが可能であり、前記複数の電極が、第1の放射線不透過性マーカーを有する第1の電極と、前記第1の放射線不透過性マーカーとは異なる第2の放射線不透過性マーカーを有する第2の電極と、を含む、工程と、
前記拡張可能な部材の画像、並びに前記左心房内の前記第1及び第2の放射線不透過性マーカーの画像を見る工程と、
前記被験者の前記食道、横隔神経、又は肺に最も近い前記左心房の一部分に対する前記第1及び第2の放射線不透過性マーカーの配向を判定する工程と、
前記第1及び第2の放射線不透過性マーカーのうちの1つを前記食道、横隔神経、又は肺に最も近い前記左心房の一部分に移動させる工程と、
前記食道、横隔神経、又は肺に近い前記一部分に近接する前記放射線不透過性マーカーのうちの前記1つにインデックス付けされた1つ又は2つ以上の電極に、他の電極と比較してより低い通電設定で通電して、隣接する解剖学的構造にほとんど又は全く影響を及ぼさずに、前記左心房内に経壁病変を形成する工程と、を含む、方法。
Claims (18)
- 電気生理学的カテーテルであって、
膜を有するバルーンであって、長手方向軸を画定する遠位端及び近位端を有する、バルーンと、
前記膜上に配置された第1の基材であって、前記第1の基材上に配置された第1の形態の第1の放射線不透過性マーカーを含む、第1の基材と、
前記膜上に配置された第2の基材であって、前記第2の基材が、前記第2の基材上に配置された第2の形態の第2の放射線不透過性マーカーを含み、前記第2の形態が前記第1の形態とは異なる、第2の基材と、を備えており、
前記第1の形態が第1の多角形を含み、前記第2の形態が第2の多角形を含む、電気生理学的カテーテル。 - 前記第1の多角形が矩形を含み、前記第2の多角形が三角形を含む、請求項1に記載の電気生理学的カテーテル。
- 前記第2の多角形が白抜きである、請求項1に記載の電気生理学的カテーテル。
- 前記第2の多角形が塗りつぶされている、請求項1に記載の電気生理学的カテーテル。
- 前記第2の多角形が、前記バルーンの前記長手方向軸に平行な中心線に対して非対称である、請求項1に記載の電気生理学的カテーテル。
- 前記第2の多角形が矢尻形を含む、請求項5に記載の電気生理学的カテーテル。
- 前記第2の多角形が第3の基材の方を向いている、請求項6に記載の電気生理学的カテーテル。
- 前記第3の基材が、前記第3の基材上に配置された第3の形態の第3の放射線不透過性マーカーを含み、前記第3の形態は前記第1の形態及び前記第2の形態とは異なる、請求項7に記載の電気生理学的カテーテル。
- 前記第3の形態が、第3の多角形を含む、請求項8に記載の電気生理学的カテーテル。
- 前記第3の多角形が三角形を含む、請求項9に記載の電気生理学的カテーテル。
- 前記第3の多角形が塗りつぶされている、請求項9に記載の電気生理学的カテーテル。
- 前記第3の多角形が白抜きである、請求項9に記載の電気生理学的カテーテル。
- 前記第3の多角形が、前記バルーンの前記長手方向軸に平行な中心線に対して非対称である、請求項9に記載の電気生理学的カテーテル。
- 前記第3の多角形が矢尻形を含む、請求項13に記載の電気生理学的カテーテル。
- 前記第3の多角形が最終基材の方を向いている、請求項14に記載の電気生理学的カテーテル。
- 前記第1の基材、第2の基材、第3の基材、及び最終基材が、前記膜の周囲に円周方向に配置され、前記最終基材が、前記膜上で前記第3の基材と前記第1の基材との間に配置されている、請求項15に記載の電気生理学的カテーテル。
- 少なくとも第4の基材が、前記第1の基材と前記第2の基材との間に配置され、少なくとも第5の基材が、前記第2の基材と前記第3の基材との間に配置されている、請求項16に記載の電気生理学的カテーテル。
- 前記第4の基材が放射線不透過性マーカーを欠き、第5の基材が放射線不透過性マーカーを欠く、請求項17に記載の電気生理学的カテーテル。
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US15/939,154 US20190298441A1 (en) | 2018-03-28 | 2018-03-28 | Irrigated electrophysiology catheter with distinguishable electrodes for multi-electrode identification and orientation under 2-d visualization |
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PCT/IB2019/052313 WO2019186336A1 (en) | 2018-03-28 | 2019-03-21 | Irrigated electrophysiology catheter with distinguishable electrodes for multi-electrode identification and orientation under 2-d visualization |
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