JP2018535739A - エネルギー送達デバイス - Google Patents
エネルギー送達デバイス Download PDFInfo
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- JP2018535739A JP2018535739A JP2018521268A JP2018521268A JP2018535739A JP 2018535739 A JP2018535739 A JP 2018535739A JP 2018521268 A JP2018521268 A JP 2018521268A JP 2018521268 A JP2018521268 A JP 2018521268A JP 2018535739 A JP2018535739 A JP 2018535739A
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Abstract
Description
第1および第2の導電性部材がそれぞれ、それぞれのトレースの電気的延長部である基端側パッドを含むことができる。
第1および第2の電極は、それぞれ第1および第2のアームの一部とすることができ、第1および第2の電極は、導電性部材と同じ材料層の一部である。
複数の突起の少なくとも50%は、同じ全般的な構成を有することができる。
複数の突起の少なくともいくつかは、概して平行な2つの側部を備えることができる。
複数の突起の少なくともいくつかは、0.00254cm〜0.127cm(0.001インチ〜0.05インチ)の長さを有する。
基板は、第1の面に少なくとも5つの突起を備えることができる。基板は、第2の面に少なくとも5つの突起を備えることができる。
本開示は、長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと;バルーンによって支持され、アームの長さの少なくとも一部に沿って互いに離間された複数のアームを備えるフレキシブル回路とを備える組織アブレーションデバイスであって、複数のアームがそれぞれ少なくとも1つのアブレーション電極を備え、第1のアームが第2のアームに隣接し、第1のアームが、第2のアームとは異なる数のアブレーション電極を有する、組織アブレーションデバイスを含む。
図2Aは、図1A〜1Cに示されるアブレーションカテーテルの先端部分の側断面図である。図2Bは、外側シャフト51内の構成要素の強調した側断面図である。図2Aは、外側管腔50の先端部で伸張された膜12を示し、外側管腔50は、外側シャフト51と潅流シャフト55との間の環状空間である。膜12の先端部は、図示されるようにアセンブリ10の内側部材と外側部材との間で、圧入および/または接着剤などによって先端側ハブアセンブリ20に固定される。膜12の基端部は、潅流シャフト55の外面に固定される。ハブ20はガイドワイヤシャフト54に固定され、ガイドワイヤシャフト54は、この実施形態ではガイドワイヤ管腔53を画定し、それにより、ガイドワイヤ(図示せず)に被さるようにアブレーションカテーテルを前進させることができる。ガイドワイヤシャフト54と潅流シャフト55は、軸方向で相対運動可能であるように適合され、これにより、膜12の先端部が膜12の基端部に対して移動される。2つの構成要素の相対運動により、バルーンの形状を変えることができる。この運動は、図1Dに示されるように、伸張可能部材10を萎んだ構成に移行させる助けともなる。
本明細書で述べる膜12の材料は様々なものとすることができる。一般に、膜材料は、薄く、容易に折り畳んで低プロファイルにすることができ、伸張後に再び折畳み可能である。材料は、弾性、非弾性、伸縮性、非伸縮性、コンプライアント性、セミコンプライアント性、またはノンコンプライアント性とすることができる。一実施形態では、膜12は、伸張可能な構造を有し、当技術分野で知られているバルーンカテーテルの構成で使用される材料などの材料から構成することができる。そのような材料としては、限定はしないが、ポリ塩化ビニル(PVC)、ポリエチレン(PE)、架橋ポリエチレン、ポリオレフィン、ポリオレフィンコポリマー(POC)、ポリエチレンテレフタレート(PET)、ナイロン、ポリマーブレンド、ポリエステル、ポリイミド、ポリアミド、ポリウレタン、シリコーン、ポリジメチルシロキサン(PDMS)などが挙げられる。膜12は、PE、POC、PET、ポリイミド、またはナイロン材料など比較的非弾性のポリマーから構成することができる。膜12は、比較的コンプライアント性のあるエラストマー材料から構成することもでき、そのような材料としては、限定はしないが、シリコーン、ラテックス、ウレタン、またはマイラー(Mylar)エラストマーが挙げられる。膜12は、例えば金属、ケブラー(Kevlar)(登録商標)、またはナイロン繊維など他の材料を埋め込むことができる。膜12は、ポリエステルまたは他の可撓性の熱可塑性もしくは熱硬化性ポリマー被膜など、薄い伸長不能なポリマー被膜から構成することもできる。一実施形態では、可撓性の膜12は、十分な破裂強度を提供して折畳みを可能にするために、約0.00254cm〜約0.00508cm(約0.001インチ〜約0.002インチ)の厚さとすることができる。いくつかの実施形態では、電極の機械的特性を膜の機械的特性にできるだけ近くすることが好ましい。これを可能にする1つの方法は、伸張されたとき伸びない非弾性膜を使用することである。これは、膜への分岐部の固定を助ける。膜12は、前面または先端面を有し、この面は、概して平坦であるが、他の形状を有することもできる。
エネルギー送達要素と接触する組織の炭化、および電極に隣接する血液の凝固の可能性をなくすまたは低減するために、電極の位置にあるフレックス回路はそれぞれ、そこを通る潅流アパーチャを含み、図示されているように電極の中心にある。また、潅流アパーチャは、膜内の膨張/潅流流体が高温になりすぎてアブレーションを妨害するのを防止する。膜12を膨張させてその伸張構成に向けて再構成させる流体でもある潅流流体は、流体源から潅流管腔52を通って膜12内へ、さらに潅流アパーチャ(符号なし)を通って、電極と接触する組織に向けて送られて、ターゲット組織を冷却する。心臓アブレーションでの従来の試みの欠点の1つは、アブレーション処置が、冷却機能がないため血液を凝固させる、または組織を炭化させることである。さらに、各電極は個別にアドレス指定可能であり、視覚化システムは、個々の電極が組織と接触しているかどうかを操作者が識別できるようにするので、組織と接触する電極のみをオンすることができる。したがって、エネルギーは、アブレーションが望まれる部位だけに、より効率的に結合され、血液中にはエネルギーがほとんどまたは全く消散されない。
少なくともカメラによって提供される画像またはビデオがディスプレイ上に表示されるとき、ディスプレイ上で電極を視覚的に識別できることが有用となり得る。例えば、ユーザインターフェースを使用して任意の電極に関する送達パラメータを制御することができ、ビデオ上の所与の電極がユーザインターフェース上の特定の電極であることを医師が容易に判断して確認できるようにすることで、処置が単純化され、所望の通りに適正な電極が作動および使用されることが保証される。
図10は、バルーンの先端部から基端方向に延在し、外側シャフト51内で基端方向に延在し、バルーンおよび潅流シャフト55の基端部の外面に固定された終端部41(各フレックス回路ごとに1つ)で終端する3つのフレックス回路テールそれぞれを示す。構成の基端側の態様は図2Bでも見ることができる。図10では、終端部41の1つから基端方向に延在する6本の導電性ワイヤ18を見ることができ、各導電性ワイヤ18が、その特定のフレックス回路内の6つの電極の1つと電気的に連絡している。6本のワイヤ18は、カテーテルの長さを延長し、RF発生器と連絡している。代替実施形態(図示せず)では、6つの導電性トレース15がカテーテルの長さを延長し、RF発生器と連絡している。図10には、視覚化システム用のカメラフレックス回路43も示されており、カテーテル内の視覚化システムから基端方向に延びている。
いくつかの実施形態では、カメラからの画像に重ね合わされる情報は、伸張可能部材に接触する心臓組織での電気的活動である。
いくつかの実施形態では、カメラからの画像に重ね合わされる情報は、バルーンに対向する心臓組織の温度である。
図33および図34は、バルーンが接触(物理的)測定用に構成されている、アブレーションカテーテルの例示的実施形態を示す。バルーン、したがって電極の接触圧は、電極が組織に押し付けられたときに、電極を通過するバルーンの潅流穴が閉塞されることによるバルーン内圧の変動によって特徴付けられる。バルーンが組織に押し付けられるとき、一時的に圧力が上昇し、その後、潅流ポートの閉塞または一部閉塞に関連する流出抵抗の減少に伴う新たな平衡に達する。この接触圧は、事前の実験によって電極接触表面積にマッピングすることができる。
接触監視は、電力送達を制御するために使用することができる。本明細書で述べる任意の手段によって得られた電極接触の測定を使用して、電極に送達される電力の量を調節することができる。1つの制御アルゴリズムは、接触面の面積当たりの電力が一定レベルで維持されるように、電極への電力を制限する。
ハウジング415は、そこを通って延在する管腔417を含み、その管腔417を通ってガイドワイヤ管腔234(図40B参照)が延びている。視覚化システム400の基端部は、デバイスのシャフトに固定される。
エネルギー送達デバイスは外部デバイス200も含み、外部デバイス200はハンドルの形態とすることができる。図40Aおよび40Bでのこの実施形態では、デバイス200は、伸張可能部材の展開および/または外装を制御するように適合されたアクチュエータ231を含む。この実施形態では、アクチュエータ231(図43および44参照)は、外側カテーテル構造110に対して軸方向(前後)にガイドワイヤ管腔234を移動させるように適合される。バルーンの先端部がガイドワイヤ管腔に(直接または間接的に)固定されるので、(アクチュエータ231による)ガイドワイヤ管腔の運動は、バルーンの先端部を動かす。アクチュエータ231は、ガイドワイヤ管腔(したがってバルーン)の運動を制御することができる外部アクチュエータの一例でもある。
フレキシブル回路は識別マーカ534も含み、識別マーカ534は、視覚化することができ、電極の位置の識別を助けることができる。この実施形態では、マーカ534は、基板層とバルーン層との間に配設され、基板に接着される。マーカは、電極の先端側領域と重なるように配設される。金が、視覚化を可能にし得るマーカの材料の一例である。マーカ間の距離、マーカの位置、数、および配置は、マークされた各アームを識別するために変えることができる。
基端側および先端側電極の下にある基板層の領域は、基板の面から外方向に延在する複数の突出部536(突起とも呼ぶ)を含む。接着剤559が突出部間の空間を占めることができるので、これらの突出部は、バルーンと基板との接着を改良する。いくつかの実施形態では、電極の下でない基板の領域が、突出部を含むことがある。
突起は、0.00254cm〜1.27cm(0.001インチ〜0.5インチ)、例えば0.00254cm〜0.635cm(0.001インチ〜0.25インチ)、例えば0.00254cm〜0.254cm(0.001インチ〜0.1インチ)、例えば0.00254cm〜0.0254cm(0.001インチ〜0.01インチ)、例えば0.00254cm〜0.01778cm(0.001インチ〜0.007インチ)の幅515を有することができる(これは図47Aの実施形態での寸法よりも短い)。突起は、0.00254cm〜0.127cm(0.001インチ〜0.05インチ)、例えば0.00254cm〜0.0635cm(0.001インチ〜0.025インチ)、例えば0.00254cm〜0.0254cm(0.001インチ〜0.01インチ)、例えば0.00254cm〜0.0127cm(0.001インチ〜0.005インチ)、例えば約0.0381cm(約0.015インチ)の長さ517を有することができる(この長さは、図47Aの実施形態での幅よりも大きい)。1つまたは複数の突起は、0.00254cm〜1.27cm(0.001インチ〜0.5インチ)、例えば0.00254cm〜0.635cm(0.001インチ〜0.25インチ)、例えば0.00254cm〜0.254cm(0.001インチ〜0.1インチ)、例えば0.00254cm〜0.127cm(0.001インチ〜0.05インチ)、例えば約0.0254cm(約0.010インチ)の軸方向距離519だけ軸方向で離間することができる。この実施形態では、基板は、第1の面に少なくとも5つの突起を備え、第2の面に少なくとも5つの突起を備える。この実施形態では、基端側電極の下の基板の各面から18個の突起があり、先端側電極の下の基板の各面から突出する16個の突起がある。いくつかの実施形態では、基板の片面または両面から延在する5〜25個の突出部がある。突起とデバイスの長手方向軸とが成す内角は、90度未満、例えば85度以下、例えば80度以下、例えば75度以下、例えば70度以下、例えば65度以下、例えば約60度とすることができる。
本明細書のいくつかの実施形態の利点の1つは、双極モードで動作しているときに、任意の隣接する電極間の組織の完全な熱傷を得ることが可能であることである。これは、任意の2つの隣接する電極を双極モードで動作させ、それらの電極間の組織を効果的に焼灼することを可能にする。これは、所望の組織領域を焼灼するための医師の選択肢を増やすので、使用時に大きな利点をもたらす。図54は、アブレーションカテーテルの例示的な作業端部を示し、見やすくするために、バルーンに対する電極の位置のみを示す。図54での電極の位置および構成は、図40Aおよび40Bと概して同じである。この文脈における「隣接する」電極は、特定の電極について、その特定の電極を取り囲む最も近い電極を表す。図54の電極「A」について、隣接する電極は電極「B」である。
Claims (51)
- 長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと、
前記バルーンによって支持されたアブレーション要素と、
前記膨張可能なバルーンの内部に配設され、第1の視野を提供する第1のレンズと、
前記膨張可能なバルーンの内部に配設され、前記第1の視野とは異なる第2の視野を提供する第2のレンズであって、前記第1のレンズから一定の距離だけ軸方向で離間されている第2のレンズと
を備える組織アブレーションおよび視覚化装置。 - 前記膨張可能なバルーンの内部に配設された第1のイメージセンサであって、前記第1のレンズを通過する光を受光するように位置決めされた第1のイメージセンサと、
前記膨張可能なバルーンの内部に配設された第2のイメージセンサであって、前記第2のレンズを通過する光を受光するように位置決めされ、前記第1のイメージセンサから一定の距離だけ軸方向で離間されている第2のイメージセンサと
をさらに備える、請求項1に記載の装置。 - 前記膨張可能なバルーンの内部に配設された第3のレンズであって、前記第1のレンズから一定の距離だけ軸方向で離間されている第3のレンズをさらに備える、請求項1に記載の装置。
- 前記膨張可能なバルーンの内部に配設された第3のイメージセンサであって、前記第3のレンズを通過する光を受光するように位置決めされ、前記第1のイメージセンサから一定の距離だけ軸方向で離間されている第3のイメージセンサをさらに備える、請求項3に記載の装置。
- 前記膨張可能なバルーンの内部に配設された第4のレンズであって、前記第2のレンズから一定の距離だけ軸方向で離間されている第4のレンズをさらに備える、請求項4に記載の装置。
- 前記第1のレンズと前記第4のレンズが、軸方向で整列される、または前記第1のレンズと前記第2のレンズとの間の距離よりも小さい一定の軸方向距離を互いに保つ、請求項5に記載の装置。
- 前記第4のレンズを通過する光を受光するように位置決めされた第4のイメージセンサであって、第2のイメージセンサから一定の距離だけ軸方向で離間されている第4のイメージセンサをさらに備える、請求項5に記載の装置。
- 前記第2のレンズと前記第3のレンズが、軸方向で整列される、または前記第1のレンズと前記第2のレンズとの間の距離よりも小さい一定の軸方向距離を互いに保つ、請求項3に記載の装置。
- 前記膨張可能なバルーンの内部に配設された第3のレンズであって、前記第1のレンズから一定の距離だけ軸方向で離間されている第3のレンズをさらに備える、請求項1に記載の装置。
- 前記膨張可能なバルーンの内部に配設された第4のレンズであって、前記第2のレンズから一定の距離だけ軸方向で離間されている第4のレンズをさらに備える、請求項9に記載の装置。
- 前記バルーンの内側に配設された視覚化ハウジングアセンブリであって、前記第1および第2のレンズを備える視覚化ハウジングアセンブリをさらに備える、請求項1に記載の装置。
- 前記バルーン内に配設され、前記バルーンを通って軸方向に延在する長尺状の部材であって、前記バルーンの先端部に固定され、前記視覚化ハウジングアセンブリ内に配設され、前記視覚化ハウジングアセンブリに対して軸方向で可動である長尺状の部材をさらに備える、請求項11に記載の装置。
- 前記バルーンによって支持された複数の電極であって、それぞれが前記バルーンの頂点に配設された一部分を有する複数の電極をさらに備える、請求項1に記載の装置。
- 前記バルーンによって支持された複数の第2の電極であって、それぞれが、前記複数の電極それぞれの先端部よりも先端方向に延在する先端部を有する、複数の第2の電極をさらに備える、請求項13に記載の装置。
- 長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと、
前記バルーンによって支持されたフレキシブル回路であって、アームの長さの少なくとも一部に沿って互いに離間された第1および第2のアームを備え、前記第1のアームが第1の導電性部材を備え、前記第2のアームが第2の導電性部材を備え、前記第1の導電性部材が前記第1のアームの基端側領域まで延在し、前記第2の導電性部材が前記第2のアームの基端側領域まで延在する、フレキシブル回路と、
前記第1の導電性部材と電気連絡する第1の電極、および前記第2の導電性部材と電気連絡する第2の電極と
を備える組織アブレーションデバイスであって、
前記第1のアームが、前記第2のアームの基端部よりも基端方向に延在する基端部を有する、組織アブレーションデバイス。 - 前記第1および第2のアームがそれぞれ、それぞれの導電性部材が固定された基板を備え、各基板がそれぞれのアームの基端部まで延在する、請求項15に記載のデバイス。
- 前記第1および第2の導電性部材がそれぞれ、それぞれのトレースの電気的延長部である基端側パッドを含む、請求項15に記載のデバイス。
- 前記第1および第2の電極が、それぞれの導電性部材と一体ではない、請求項15に記載のデバイス。
- 前記電極がそれぞれ、それぞれのアームの上に配設される、請求項18に記載のデバイス。
- 前記第1および第2の電極が、それぞれ前記第1および第2のアームの一部であり、前記第1および第2の電極が、導電性部材と同じ材料層の一部である、請求項15に記載のデバイス。
- 前記第1のアームが複数の第1のアームのうちの1つであり、前記第2のアームが複数の第2のアームのうちの1つであるように、複数の第1のアームと複数の第2のアームとをさらに備え、前記複数の第1のアームがそれぞれ、前記複数の第2のアームそれぞれの基端部よりも基端方向に延在する基端部を有する請求項15に記載のデバイス。
- 前記複数の第1のアームと前記複数の第2のアームとが、前記バルーンの少なくとも一部の周りで交互配置で前記バルーンによって支持される、請求項21に記載のデバイス。
- 前記複数の第1のアームがそれぞれ、前記複数の第2のアームのうちの2つに隣接し、前記複数の第2のアームがそれぞれ、前記バルーンの周りの前記複数の第1のアームのうちの2つに隣接する、請求項22に記載のデバイス。
- 前記複数の第1のアームが少なくとも4本のアームを備え、前記複数の第2のアームが少なくとも4本のアームを備える、請求項22に記載のデバイス。
- 前記複数の第1および第2のアームがそれぞれ、少なくとも6本のアームを備える、請求項24に記載のデバイス。
- 前記複数の第1のアームがそれぞれ、前記デバイスに沿って、前記複数の第1のアームの他の基端部それぞれと同じ軸方向位置まで延在する基端部を有する、請求項22に記載のデバイス。
- 前記複数の第2のアームがそれぞれ、前記デバイスに沿って、前記複数の第2のアームの他の基端部それぞれと同じ軸方向位置まで延在する基端部を有する、請求項26に記載のデバイス。
- 前記第1のアームが、前記第1のアームの基端側領域に延在する第3の導電性部材を備え、前記第1の導電性部材が、前記第3の導電性部材の基端部よりも基端方向に延在する基端部を有し、前記第3の導電性部材が、第3の電極と電気的に連絡している、請求項15に記載のデバイス。
- 長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと、
前記バルーンの外面に固定された基板であって、前記基板の少なくとも1つの面から横方向および先端方向に延在する複数の突起を備え、前記複数の突起が前記バルーンへの前記基板の接着を向上させる、基板と、
前記複数の突起のうちの第1と第2の突起の間に配設され、前記バルーンと接触する接着剤と、
前記基板に固定され、電極と電気的に連絡している導電性要素と
を備える、組織アブレーションデバイス。 - 前記複数の突起が、前記基板の第1および第2の面から横方向に延在する、請求項29に記載のデバイス。
- 前記複数の突起の少なくとも50%が、同じ全般的な構成を有する、請求項29に記載のデバイス。
- 前記複数の突起の少なくともいくつかが、概して平行な2つの側部を備える、請求項29に記載のデバイス。
- 前記複数の突起の少なくともいくつかが、0.00254cm〜1.27cm(0.001インチ〜0.5インチ)の幅を有する、請求項29に記載のデバイス。
- 前記複数の突起の少なくともいくつかが、0.00254cm〜0.127cm(0.001インチ〜0.05インチ)の長さを有する、請求項29に記載のデバイス。
- 前記複数の突起の少なくともいくつかが、0.00254cm〜1.27cm(0.001インチ〜0.5インチ)だけ軸方向で離間される請求項29に記載のデバイス。
- 前記基板が、第1の面に少なくとも5つの突起を備える、請求項29に記載のデバイス。
- 前記基板が、第2の面に少なくとも5つの突起を備える、請求項36に記載のデバイス。
- 前記電極が、前記複数の突起のうちのいくつかを覆う前記基板の上に配設される、請求項29に記載のデバイス。
- 長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと、
前記バルーンによって支持され、アームの長さの少なくとも一部に沿って互いに離間された複数のアームを備えるフレキシブル回路と
を備える組織アブレーションデバイスであって、
前記複数のアームがそれぞれ少なくとも1つのアブレーション電極を備え、
第1のアームが第2のアームに隣接し、前記第1のアームが、前記第2のアームとは異なる数のアブレーション電極を有する
組織アブレーションデバイス。 - 前記複数のアームが、複数の第1のアームおよび複数の第2のアームを備え、前記複数の第1のアームが、第1の数のアブレーション電極を有し、前記複数の第2のアームが、アブレーション電極の前記第1の数とは異なる第2の数のアブレーション電極を有する、請求項39に記載のデバイス。
- 前記複数のアームが、前記複数の第1のアームと前記複数の第2のアームが交互配置されるように前記バルーンの周りに配置される、請求項40に記載のデバイス。
- 前記複数の第1のアームがそれぞれ、2つのアブレーション電極を有し、前記複数の第2のアームがそれぞれ、1つのアブレーション電極を有する、請求項40に記載のデバイス。
- 前記複数のアームが、前記複数の第1のアームと前記複数の第2のアームが交互配置されるように前記バルーンの周りに配置される、請求項42に記載のデバイス。
- 前記第1および第2のアームがそれぞれマッピング電極を備えることを特徴とする請求項40に記載のデバイス。
- 前記複数の第1のアームがそれぞれ、前記バルーンの長さに沿って軸方向で整列された電極の第1のアレイの一部である電極を含む、請求項40に記載のデバイス。
- 前記複数の第2のアームがそれぞれ、前記バルーンの長さに沿って軸方向で整列された電極の第2のアレイの一部である電極を含み、前記第2のアレイが前記第1のアレイから軸方向で離間される、請求項45に記載のデバイス。
- 前記複数の第2のアームもそれぞれ、前記バルーンの長さに沿って軸方向で整列された電極の前記第1のアレイの一部である電極を備える、請求項46に記載のデバイス。
- 長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと、
前記バルーンの外面によって支持された複数の電極であって、双極モードで作動されるときに任意の2つの隣接する電極が25W以下、任意選択で15W以下の電力入力で前記2つの電極間の組織に完全な熱傷を生じさせるように、それぞれがサイズ設定されて位置決めされる複数の電極と
を備える組織アブレーションデバイス。 - 特定の電力密度で組織を焼灼する方法であって、
膨張可能なバルーンと、それによって支持された複数の電極とを備える伸張可能なデバイスを提供するステップと、
前記複数の電極のうちの少なくとも2つを組織に接触するように移動させるステップと、
25W以下、任意選択で15W以下の電力で、双極モードで2つの隣接する電極間にRFエネルギーを送達して、前記電極の表面積と前記電極間の空間とに基づいて40W/cm2以下の電力密度を生成するステップと、
前記RFエネルギーを送達することによって前記2つの電極間で組織を焼灼するステップと
を含む方法。 - 特定の電力密度で組織を焼灼する方法であって、
膨張可能なバルーンと、それによって支持された複数の電極とを備える伸張可能なデバイスを提供するステップと、
前記複数の電極のうちの少なくとも2つを組織に接触するように移動させるステップと、
エネルギー密度が40W/cm2以下になるように、双極モードで2つの隣接する電極間にRFエネルギーを送達するステップと
を含む方法。 - 長尺状のシャフトの先端側領域に配設された膨張可能なバルーンと、
前記バルーンの外面によって支持された複数の先端側電極、および前記バルーンの外面によって支持された複数の基端側電極とを備える組織アブレーションデバイスであって、前記基端側電極および先端側電極が全て、任意選択で互いに5%以内の実質的に同じ表面積を有し、前記基端側電極が第1の構成を有し、前記先端側電極が第2の構成を有し、前記第1の構成と前記第2の構成が異なる
組織アブレーションデバイス。
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CN108348146A (zh) | 2018-07-31 |
US10736693B2 (en) | 2020-08-11 |
EP4302713A2 (en) | 2024-01-10 |
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