JP2021500203A - 電界による癌治療用の容量充填リード - Google Patents
電界による癌治療用の容量充填リード Download PDFInfo
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- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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Abstract
Description
第7の態様では、先行する若しくは以下の態様の1つ以上に加えて、又はいくつかの態様の代替として、リードヘッドは拡張可能なバルーンを含む。
第9の態様では、先行する若しくは以下の態様の1つ以上に加えて、又はいくつかの態様の代替として、リード本体内に内腔を配置することができ、拡張可能なバルーンは内腔と流体連通することができる。
リード及び電極
本明細書中に記載されるリードは、いくつかの手法を用いて、体内の、癌性腫瘍の部位近傍に配置され得る。1つ以上のリードの配置には、経血管配置、皮下腔へのトンネリング、及び/又は外科的配置などの手法を使用することを含み得る。いくつかの実施形態では、1つ以上のリードの配置は、1つ以上の天然身体開口部を通した配置を含み得る。リードは、癌性腫瘍に隣接して又は癌性腫瘍内に配置され得る。いくつかの実施形態では、癌性腫瘍の近くで又は遠くで複数のリードが使用され得る。
治療パラメータ
癌性腫瘍の成功的治療は、電界強度、周波数、細胞の不均一性、細胞の大きさ、癌細胞の種類、腫瘍の大きさ、及び体内の位置を含むいくつかの変数に依存し得る。本明細書中に記載される医療デバイスを使用し、様々な治療パラメータが実施され得る。1つ以上の治療的パラメータセットは医療デバイスのメモリにプログラムされ、図3に示される制御回路306によって実施され得る。例示的な治療的パラメータセットは、以下の概念を実施するものを含み得る:様々な周波数の掃引、1つ以上の周波数の同時スタッキング、1つ以上の周波数の逐次ステッピング、1つ以上の電界の空間的又は時間的送達、様々な電界強度の掃引、有効な回転電界の印加、電圧制御モード又は電流制御モードの調整、1つ以上のデューティサイクルの実施、パルス幅変調、波形形状及び/又はパルス系列の操作、並びに高周波又は高電界強度パルスの時折の使用。
電界発生器
本明細書で具現化される医療デバイスは、癌性腫瘍の治療過程中に使用される治療法及び診断法に特に適した電界発生器を含み得る。いくつかの実施形態では、本明細書での使用に適した電界発生器は、癌性腫瘍の主要治療として指示されることの多い放射線治療の有害な作用にその構成要素が耐えるようにするために放射硬化で処理されたものを含み得る。電界発生器は、上記の図3及び図5を参照して説明したものなどの構成要素を含み得る。
Claims (15)
- 癌治療システム用のリードであって、
基端部と先端部とを有するリード本体であって、内腔を画定する、リード本体と、
前記リード本体の前記先端部に接続された拡張可能なリードヘッドであって、体内空隙を充填するために、第1の非拡張位置と第2の拡張位置との間で拡張するように構成されている、リードヘッドと、
前記リードヘッドの外部表面上に配置された2つ以上の電極と、
前記2つ以上の電極と前記リード本体の前記基端部との間に電気通信を提供するように構成された2つ以上の電気伝導体と、
を含む、リード。 - 前記リードヘッドは基端部及び先端部を含み、前記リードヘッドは、前記基端部と前記先端部との間に延びる1つ以上の可撓性支持体を含む、請求項1及び3〜8のいずれか一項に記載のリード。
- 前記1つ以上の可撓性支持体は外側に曲がるように付勢され、前記リードヘッドに前記第2の拡張位置をとらせる、請求項1〜2及び4〜8のいずれか一項に記載のリード。
- 前記1つ以上の可撓性支持体は基端部及び先端部を含み、前記可撓性支持体の前記基端部及び前記先端部のうちの少なくとも1つは前記リード本体に対して移動し、前記可撓性支持体を外側に曲げるように構成されている、請求項1〜3及び5〜8のいずれか一項に記載のリード。
- 前記拡張可能なリードヘッドの直径は前記第1の非拡張位置において2センチメートル未満、及び前記第2の拡張位置において2センチメートル超である、請求項1〜4及び6〜8のいずれか一項に記載のリード。
- 前記1つ以上の可撓性支持体上に前記2つ以上の電極が配置されている、請求項1〜5及び7〜8のいずれか一項に記載のリード。
- 前記リードヘッドは拡張可能なバルーンを含む、請求項1〜6及び8のいずれか一項に記載のリード。
- 前記2つ以上の電極は、前記拡張可能なバルーンの外側に配置されている、請求項1〜7のいずれか一項に記載のリード。
- 以前に癌と診断された患者を治療する方法であって、
患者内にリードを植え込むことであって、前記リードは、
基端部と先端部とを有するリード本体であって、内腔を画定する、リード本体と、
前記リード本体の前記先端部に接続された拡張可能なリードヘッドであって、体内空隙を充填するために、第1の非拡張位置と第2の拡張位置との間で拡張するように構成されている、リードヘッドと、
前記リードヘッドの外部表面上に配置された2つ以上の電極と、
前記2つ以上の電極と前記リード本体の前記基端部との間に電気通信を提供するように構成された2つ以上の電気伝導体と、
を含む、ことと、
体内空隙内に前記リードヘッドを配置することと、
前記1つ以上の電極によって1つ以上の電界を発生させることと、
を含む、方法。 - 前記リードヘッドを配置する操作の後に前記体内空隙内で前記リードヘッドを拡張させることを更に含む、請求項9及び11のいずれか一項に記載の方法。
- 前記1つ以上の電極によって1つ以上の電界を発生させることは、治療部位に、1V/cm〜10V/cmの電界強度を有する電界を発生させることを含む、請求項9又は10に記載の方法。
- 癌治療システム用のリードであって、
基端部と先端部とを有するリード本体であって、内腔を画定する、リード本体と、
前記リード本体の先端部の外部表面上に配置された2つ以上の電極と、
前記2つ以上の電極と前記リード本体の基端部との間に電気通信を提供するように構成された2つ以上の電気伝導体と、
を含み、
前記リード本体の前記先端部は螺旋部を含む、
リード。 - 前記1つ以上の電極は、前記螺旋部の中心軸線から外側に面した前記螺旋部の表面上に配置されている、請求項12及び14〜15のいずれか一項に記載のリード。
- 前記螺旋部は可撓性であり、内側に加えられる圧力が増加するにつれて直径を減少させることができ、内側に加えられる圧力が減少するにつれて直径を増加させることができる、請求項12〜13及び15のいずれか一項に記載のリード。
- 前記螺旋部は、圧力が内側に加えられていないとき、少なくとも1センチメートルの外径を有する、請求項の12〜14いずれか一項に記載のリード。
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