JP6979882B2 - 脳組織の治療のための組織破砕療法システムおよび方法 - Google Patents
脳組織の治療のための組織破砕療法システムおよび方法 Download PDFInfo
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Description
[0001]本出願は、参照により全体として組み込まれる、2015年6月24日出願の「HISTOTRIPSY THERAPY SYSTEMS AND METHODS FOR THE TREATMENT OF INTRACEREBRAL HEMORRHAGE(脳内出血の治療のための組織破砕治療システムおよび方法)」という名称の米国仮特許出願第62/184,179号の利益を主張するものである。
[0002]本明細書で言及するすべての刊行物および特許出願は、個々の刊行物または特許出願それぞれが参照により組み込まれるように明確かつ個々に示されたのと同じ範囲で、参照により本明細書に組み込まれるものである。
[0003]本開示は、概して、超音波療法により作り出されたキャビテーションで組織を治療することに関する。さらに具体的には、本開示は、脳内出血(ICH)もしくは脳腫瘍などの脳組織または脳の疾患を超音波療法で治療することに関する。
[0014]別の実施形態では、方法は、超音波パルスにより標的組織上に気泡雲を形成するステップをさらに含む。
[0016]別の実施形態では、方法は、溶解した標的組織を、ドレナージカテーテルで脳から排出するステップを含む。
[0021]人間の患者の脳内の標的組織を治療するように構成された超音波システムも提供され、これは、パルス発生器および増幅器と、パルス発生器および増幅器に連結された超音波療法トランスデューサであって、キャビテーションを生成するために脳内の標的組織内部の焦点(focal point)に向けて人間の患者の頭蓋冠を通じて超音波パルスを送信するように構成された複数のトランスデューサ素子を有する、超音波療法トランスデューサと、1つまたは複数の圧電センサを含むドレナージカテーテルであって、超音波パルスを測定するために脳内部で焦点の近くに設置されるように構成されている、ドレナージカテーテルと、パルス発生器、増幅器、超音波療法トランスデューサ、およびドレナージカテーテルの圧電センサに連結された電子制御装置であって、人間の患者の頭蓋冠を通過する超音波パルスによって生じた収差効果を自動で補正するためにドレナージカテーテルによって検出された超音波パルスに基づいて収差補正アルゴリズムを実行することにより、超音波パルスの送信を制御し、複数のトランスデューサ素子それぞれからの超音波パルスの送信を調節するように構成されている、電子制御装置と、を含む。
[0024]いくつかの実施形態では、1つまたは複数の圧電センサは、ただ1つの圧電センサを含む。この実施形態では、収差補正アルゴリズムは、超音波パルスが療法トランスデューサの複数のトランスデューサ素子それぞれから圧電センサへと移動する伝搬時間を決定することと、療法トランスデューサの複数のトランスデューサ素子それぞれと基準素子との間の、伝搬時間の時間遅延を計算することと、計算された時間遅延に基づいて複数のトランスデューサ素子からの超音波パルスの送信を調節することと、を含む。
[0027]本発明の新奇な特徴は、以下の特許請求の範囲において詳細に説明される。本発明の特徴および利点のより良い理解は、本発明の原理が利用されている例示的な実施形態、および添付図面を説明する、以下の詳細な説明を参照することにより、得られる。
[0042]USBシリアル変換器104は、PCまたは電子制御装置からFPGAに通信するために、USBコンビネーションをシリアルに変換することができる。発生器と制御装置との間の接続がUSB接続ではない実施形態では、他の変換器を使用してよい(またはまったく使用しなくてもよい)ことを理解されたい。
[0043]FPGA108は、PCまたは電子制御装置102から情報を受信し、増幅器112を駆動するのに必要である複雑なパルスシーケンスを生成することができる。FPGAは、パルスのスピードが少なくとも10ns刻みで時間調整されることが重要であるので、100MHzのクロックで動き得る。
[0044]高電圧制御装置および電源110は、増幅器の出力において適切な電圧振幅レベルを有するために、増幅器回路に供給される必要があるDC電圧のレベルを決定する。
[0045]増幅器112は、FPGAにより生成されたパルスを受信し、高電圧制御装置および電源から高電圧を供給される。増幅器は、療法トランスデューサのインピーダンスを増幅器のインピーダンスに適切に適合させる、マッチングネットワークコンポーネントを通じて療法トランスデューサ114に供給される高電圧振幅パルスを生成する。高電圧振幅パルスの生成中にピーク電流需要を支持するために十分なエネルギーを蓄積することができる、多数のコンデンサを使用する必要があり得る。
[0046]療法トランスデューサ114は、単一素子トランスデューサ、または複数のトランスデューサ素子を含み、本明細書に記載する超音波療法パルスを生成し組織または他の媒体内に送達するように構成された、多素子超音波療法トランスデューサであってよい。いくつかの実施形態では、多素子超音波療法トランスデューサは、2つまたは3つ以上の周波数の超音波パルスを生成することができる。療法トランスデューサのアクティブなトランスデューサ素子は、圧電トランスデューサ素子であってよい。いくつかの実施形態では、トランスデューサ素子は、共通の幾何学的焦点を有する音響レンズに装着され得る。
[0050]図2は、システムのドレナージカテーテル117の拡大図であり、ドレナージカテーテル117は、シース部分118と、ガイドワイヤ部分120と、を含み得る。シース部分は、可撓性材料を含んでよく、カテーテルを通じた体液または組織の除去を促進するために1つまたは複数のドレナージポート119を含み得る。ガイドワイヤ部分120は、カテーテルを組織の標的領域へと操作するためにシース部分118内に挿入可能であってよい。ドレナージカテーテルは、ガイドワイヤ部分120に沿って配された1つまたは複数の圧電(PZT)センサ122をさらに含み得る。図2の実施形態は、2つのPZTセンサを示すが、任意の数のPZTセンサが実装され得ることを理解されたい。例えば、いくつかの実施形態は、1つのPZTセンサを利用する。カテーテルのPZTセンサは、療法トランスデューサによって送信された波形間の時間遅延を抽出するため、療法トランスデューサ114の個々の素子からの超音波パルス波形を測定するように構成され得る。時間遅延はその後、収差補正のためにシステムによって使用され得る。
[0053]組織破砕サービスツールは、任意のPCまたは計算システム(例えば電子制御装置)で動くことができ、システムの制御に使用され得る、ソフトウェアである。組織破砕サービスツールは、療法トランスデューサで療法を開始/停止し、高電圧レベル、療法パラメータ(PRF、サイクル数、デューティー比、有効化したチャネルおよび遅延など)を設定し読み取り、他のサービスおよび維持関連アイテムを設定し読み取ることができる。組織破砕サービスツールおよび電子制御装置は、加工パラメータを設定し/読み取り、療法を開始/停止などするように構成され得る。パラメータをすべて格納するために内部フラッシュメモリまたは他の電子記憶媒体を使用することができる。組織破砕サービスツールおよび電子制御装置は、複雑なパルスを生成するのに必要なすべての駆動パラメータをFPGA108に通信することができる。これらは、シリアル通信または他の電子通信を用いて高電圧制御装置および電源110に通信することもでき、ここで、駆動電圧の適切なレベルを設定し/読み取ることができる。
Claims (8)
- 人間の患者の脳内の標的組織を治療するように構成された超音波システムであって、
パルス発生器および増幅器と、
前記パルス発生器に連結された超音波療法トランスデューサであって、キャビテーションを生成するために前記脳内の前記標的組織の内部の焦点に向けて前記人間の患者の頭蓋冠を通じて超音波パルスを送信するように構成された複数のトランスデューサ素子を有する、超音波療法トランスデューサと、
1つまたは複数の圧電センサを含むドレナージカテーテルであって、前記超音波パルスを測定するために前記脳内で前記焦点の近くに設置されるように構成されている、ドレナージカテーテルと、
前記パルス発生器、前記超音波療法トランスデューサ、および前記ドレナージカテーテルの前記圧電センサに連結された電子制御装置であって、前記人間の患者の前記頭蓋冠を通過する前記超音波パルスによって生じた収差効果を自動で補正するために前記ドレナージカテーテルによって検出された前記超音波パルスに基づいて収差補正アルゴリズムを実行することにより、前記超音波パルスの送信を制御し、前記複数のトランスデューサ素子それぞれからの超音波パルスの前記送信を調節するように構成されている、電子制御装置と、
を含む、超音波システム。 - 前記超音波療法トランスデューサは、前記人間の患者の前記脳内の前記標的組織を溶解させるためにキャビテーションを生成するため、組織破砕療法パルスを送信するように構成されている、請求項1に記載の超音波システム。
- 前記ドレナージカテーテルは、溶解した前記標的組織を前記人間の患者から排出するように構成されたドレナージポートを含む、請求項2に記載の超音波システム。
- 前記1つまたは複数の圧電センサは、ただ1つの圧電センサを含む、請求項1に記載の超音波システム。
- 前記収差補正アルゴリズムは、
前記超音波パルスが前記療法トランスデューサの前記複数のトランスデューサ素子それぞれから圧電センサへと移動する伝搬時間を決定することと、
前記療法トランスデューサの前記複数のトランスデューサ素子それぞれと基準素子との間の、前記伝搬時間の時間遅延を計算することと、
計算された前記時間遅延に基づいて前記複数のトランスデューサ素子からの超音波パルスの前記送信を調節することと、を含む、請求項4に記載の超音波システム。 - 前記1つまたは複数の圧電センサは、第1および第2の圧電センサを含む、請求項1に記載の超音波システム。
- 前記収差補正アルゴリズムは、
前記超音波パルスが前記療法トランスデューサの前記複数のトランスデューサ素子それぞれから、前記第1および第2の圧電センサへと移動する伝搬時間を決定することと、
前記複数のトランスデューサ素子それぞれから前記第1および第2の圧電センサの中間点への光線上への前記第1および第2の圧電センサの射影を用いて前記第1の圧電センサと前記第2の圧電センサとの間の距離を計算することと、
前記複数のトランスデューサ素子それぞれから前記第1および第2の圧電センサの前記中間点までの前記超音波パルスの移動方向および移動の時間を計算することと、
前記複数のトランスデューサ素子それぞれについて前記焦点と前記中間点との間の隔離距離を計算することと、
前記第1の圧電センサと前記第2の圧電センサとの間の前記距離、前記中間点、および前記隔離距離に基づいて前記複数のトランスデューサ素子それぞれの時間遅延を計算することと、を含む、請求項6に記載の超音波システム。 - 前記療法トランスデューサは、穴を含み、前記ドレナージカテーテルは、前記穴を通って、前記人間の患者の前記脳内に前進するように構成されている、請求項1に記載の超音波システム。
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US20220219019A1 (en) | 2022-07-14 |
EP3313517A4 (en) | 2019-01-09 |
CN108348772A (zh) | 2018-07-31 |
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