JP6622817B2 - カテーテル・アブレーション中にパルスrfエネルギーを送達するための方法およびデバイス - Google Patents
カテーテル・アブレーション中にパルスrfエネルギーを送達するための方法およびデバイス Download PDFInfo
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Description
本出願は、2015年3月31日に出願された米国仮特許出願第62/141,066号、および2015年7月28日に出願された米国仮特許出願第62/198,114号の優先権を主張するものであり、その両方は、本明細書に完全に記載されているかのように、参照により本明細書に組み込まれる。
A.14、18”、28、32、34、36(すべて)
B.14、28、34、36
C.14、34、36
D.14、18”、36
E.32、34、36
F.18”、32、36
G.18”、32、34
H.14、18”、34
1.比例値(P)−現在の誤差に依存する。
2.積分値(I)−過去の誤差の累積。
3.微分値(D)−現在の変化率に基づく将来の誤差の予測。
以下の項目は、国際出願時の請求の範囲に記載の要素である。
(項目1)
組織内に所望の傷を作成しながらアブレーション・カテーテルのチップの温度を制御する方法であって、
発生器を電力制御モードにするステップと、
(i)傷を作成するのに十分な電力レベルで、(ii)初期時間の間、RF電力を前記チップに送達するように前記発生器を構成するステップと、
パルス制御を第1の設定点に設定するステップと、
前記チップの温度を監視するステップと、
監視されたチップ温度が前記第1の設定点に近づいた後で、前記チップに送達される前記RF電力のパルス制御を開始するステップと、
を備える、方法。
(項目2)
少なくとも前記設定するステップ、前記監視するステップ、および、前記開始するステップは、PIDコントローラ、マイクロコントローラ、プログラマブル論理コントローラ、ファームウェアおよび/またはソフトウェアによって実行される、項目1に記載の方法。
(項目3)
前記構成するステップは、前記電力レベルを50〜60ワットの範囲内に設定するステップと、前記初期時間を60秒に設定するステップと、をさらに備える、項目1に記載の方法。
(項目4)
前記第1の設定点は、前記チップ温度の所望の定常状態値を備える、項目1に記載の方法。
(項目5)
前記構成するステップは、前記初期時間を60秒に設定するステップをさらに備える、項目1に記載の方法。
(項目6)
前記パルス制御は、PIDコントローラを備え、
前記設定するステップでは、前記第1の設定点が、測定されたプロセス変数に関連し、前記PIDコントローラが、前記測定されたプロセス変数を前記第1の設定点と継続的に比較すると共に、前記測定されたプロセス変数が前記第1の設定点に近づいたとき、前記アブレーション・カテーテルへのRFエネルギーの送達をパルス化することを開始するように構成される、項目1に記載の方法。
(項目7)
前記測定されたプロセス変数は、前記アブレーション・カテーテルの前記チップの温度を備え、前記第1の設定点は、所望のチップ温度である、項目6に記載の方法。
(項目8)
前記パルス制御は、測定されたチップ温度の前記第1の設定点への漸進的な収束を達成するように構成される、項目7に記載の方法。
(項目9)
前記所望の傷が完成するまで、パルスRF電力を前記チップに送達し続けるステップをさらに備える、項目1に記載の方法。
(項目10)
前記パルス制御を第2の設定点に変更するステップと、
前記チップに送達される前記RF電力のパルス制御を中止し、定常RF電力を前記チップに送達するステップと、
前記監視されたチップ温度を前記第2の設定点と比較するステップと、
前記監視されたチップ温度が前記第2の設定点に近づいた後、前記チップに送達される前記RF電力のパルス制御を再確立するステップと、
前記所望の傷が完成するまで、パルスRF電力を前記チップに送達し続けるステップと、
をさらに備える、項目1に記載の方法。
(項目11)
前記第2の設定点は、前記第1の設定点よりも大きい、項目10に記載の方法。
(項目12)
前記再確立するステップにおける前記RF電力の前記パルス制御は、前記監視されたチップ温度を前記第2の設定点に維持するように制御される、項目10に記載の方法。
(項目13)
前記再確立するステップにおける前記RF電力の前記パルス制御は、RF電力が積極的に前記チップに送達される第1の期間を変化させ、RF電力が前記チップに送達されるのを妨げられる第2の期間を変化させるステップをさらに備える、項目12に記載の方法。
(項目14)
前記第1の設定点は、前記チップ温度の初期定常状態値を備え、前記第2の設定点は、前記チップ温度の最終定常状態値を備える、項目10に記載の方法。
(項目15)
アブレーション処置中のアブレーション・カテーテルへのエネルギーの送達を制御するための方法であって、
アブレーション発生器を電力制御モードに設定するステップと、
所望のアブレーション電力レベルを入力するステップと、
所望の温度設定点を入力するステップと、
アブレーション・サイクルを開始するステップと、
カテーテル・チップ温度を監視するステップと、
監視された前記カテーテル・チップ温度が前記所望の温度設定点に達するか、またはそれに近づいたとき、前記アブレーション・カテーテルに送達される前記エネルギーのパルス制御を開始するステップと、
を備える、方法。
(項目16)
アブレーション処置中のアブレーション・カテーテルへのエネルギーの送達を制御するためのシステムであって、
電力制御モードで動作可能なアブレーション発生器と、
所望のアブレーション電力レベルを入力するための入力デバイスと、
所望の温度設定点を入力するための入力デバイスと、
カテーテル・アブレーション処置中にアブレーション・カテーテルから温度フィードバックを受信するように適合されたパルス制御ボックスと、
を備え、
前記パルス制御ボックスは、受信した前記温度フィードバックを前記所望の温度設定点またはその近くに維持しながら、前記カテーテル・アブレーション処置中に前記所望のアブレーション電力レベルで前記アブレーション・カテーテルへのアブレーション・エネルギーの送達をパルス化するように構成される、システム。
(項目17)
カテーテル・アブレーション中にパルスRFエネルギーを送達するためのシステムであって、
RFエネルギーを発生するように構成される発生器と、
前記発生器に動作可能に接続され、前記RFエネルギーの送達を制御するように構成され、前記RFエネルギーをパルス状に送達するように適合されるパルス制御ボックスと、
アブレーション・カテーテルであって、前記アブレーション・カテーテルのチップ内に取り付けられた少なくとも1つの温度センサを備えるアブレーション・カテーテルと、
を備え、
前記アブレーション・カテーテルは、前記パルス制御ボックスに動作可能に接続され、チップ温度を前記パルス制御ボックスに伝達するように適合される、パルスRFエネルギーを送達するためのシステム。
(項目18)
前記パルス制御ボックスは、前記発生器と一体となっている部分を備える、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目19)
前記少なくとも1つの温度センサは、熱電対およびサーミスタからなるグループから選択される、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目20)
前記少なくとも1つの温度センサは、複数の温度センサを備え、
前記パルス制御ボックスに送達される前記チップ温度の情報は、前記複数の温度センサのうちのいずれか1つによって感知された最も高い温度を備える、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目21)
前記複数の温度センサのうちのいずれか1つによって感知された前記最も高い温度を前記発生器に伝達するための専用通信ラインをさらに備え、
前記発生器は、前記最も高い温度が所定のしきい値を超えたときはすぐに、電力を低減するかまたはシャットダウンするように構成される、項目20に記載のパルスRFエネルギーを送達するためのシステム。
(項目22)
前記少なくとも1つの温度センサは、複数の温度センサを備え、
前記パルス制御ボックスに送達される前記チップ温度の情報は、前記複数の温度センサを含むすべての温度センサによって感知された個々の温度のすべての平均値を備える、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目23)
前記少なくとも1つの温度センサは、複数の温度センサを備え、
前記発生器は、RFエネルギーを前記パルス制御ボックスに送達するように構成され、
前記パルス制御ボックスは、少なくとも前記複数の温度センサによって感知された温度に基づいて、前記発生器から受け取った前記RFエネルギーを前記アブレーション・カテーテルの前記チップに渡すかどうかを決定するように構成される、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目24)
前記少なくとも1つの温度センサは、複数の温度センサを備え、
前記発生器は、RFエネルギーを前記アブレーション・カテーテルに直接送達するように構成され、前記パルス制御ボックスは、RFエネルギーを前記アブレーション・カテーテルの前記チップに送達するようにRF発生器に指示するかどうかを、少なくとも前記複数の温度センサによって感知された温度に基づいて決定するように構成される、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目25)
前記RF発生器は、上昇する温度が前記複数の温度センサによって感知されたことに応答して電力を調節することなく、RF電力を送達するように構成される、項目23または24に記載のパルスRFエネルギーを送達するためのシステム。
(項目26)
前記RF発生器は、パルスRF電力を前記アブレーション・カテーテルに送達するように構成され、
前記RF発生器は、(i)RF電力の連続するパルス間の第1の時間長と、(ii)RFエネルギーが前記アブレーション・カテーテルの前記チップに送達される間の第2の時間長とを制御することによって前記チップ温度を制御するように構成される、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目27)
前記RF発生器、前記パルス制御ボックス、および、前記カテーテル・アブレーション・カテーテルのうちの少なくとも1つに動作可能に接続されるCPUをさらに備える、項目17に記載のパルスRFエネルギーを送達するためのシステム。
(項目28)
前記パルス制御ボックスは、PIDコントローラ、マイクロコントローラ、プログラマブル論理コントローラからなるグループから選択される、項目17に記載のパルスRFエネルギーを送達するためのシステム。
Claims (14)
- 組織内に所望の傷を作成するためのアブレーション・カテーテルのチップの温度を制御するシステムであって、
(i)傷を作成するのに十分な電力レベルで、(ii)発生器が連続したRF電力の送達を開始してから所望の時間が経過するまでの初期時間の間、連続したRF電力を前記チップに送達するように前記発生器を構成する手段と、
パルス制御ボックスを第1の温度設定点に設定する手段であって、前記パルス制御ボックスは、前記発生器に動作可能に接続されると共に、パルス状のRF電力を前記チップに送達するように構成される、前記設定する手段と、
前記チップの温度を監視する手段と、
監視されたチップ温度が前記第1の温度設定点に近づいた後で、前記チップへのパルス状のRF電力の送達を開始する手段と、
を備える、システム。 - 少なくとも前記設定する手段、前記監視する手段、および、前記開始する手段は、PIDコントローラ、マイクロコントローラ、プログラマブル論理コントローラ、ファームウェアおよび/またはソフトウェアによって実行される、請求項1に記載のシステム。
- 前記構成する手段は、前記電力レベルを50〜60ワットの範囲内に設定する手段と、前記初期時間を60秒に設定する手段と、をさらに備える、請求項1又は2に記載のシステム。
- 前記第1の温度設定点は、前記チップ温度の所望の定常状態値を備える、請求項1〜3のいずれか一項に記載のシステム。
- 前記構成する手段は、前記初期時間を60秒に設定する手段をさらに備える、請求項1又は2に記載のシステム。
- 前記パルス制御ボックスは、PIDコントローラを備え、
前記設定する手段では、前記第1の温度設定点が、測定されたプロセス変数に関連し、前記PIDコントローラが、前記測定されたプロセス変数を前記第1の温度設定点と継続的に比較すると共に、前記測定されたプロセス変数が前記第1の温度設定点に近づいたとき、前記アブレーション・カテーテルへのRF電力の送達をパルス状にすることを開始するように構成される、請求項1に記載のシステム。 - 前記測定されたプロセス変数は、前記アブレーション・カテーテルの前記チップの温度を備え、前記第1の温度設定点は、所望のチップ温度である、請求項6に記載のシステム。
- 前記パルス制御ボックスは、測定されたチップ温度の前記第1の温度設定点への漸進的な収束を達成するように構成される、請求項7に記載のシステム。
- 前記所望の傷が完成するまで、パルス状のRF電力を前記チップに送達し続ける手段をさらに備える、請求項1〜8のいずれか一項に記載のシステム。
- 前記パルス制御ボックスを第2の温度設定点に変更する手段と、
前記チップへのRF電力のパルス状の送達を中止し、連続したRF電力を前記チップに送達する手段と、
前記監視されたチップ温度を前記第2の温度設定点と比較する手段と、
前記監視されたチップ温度が前記第2の温度設定点に近づいた後、前記チップへのRF電力のパルス状の送達を再確立する手段と、
前記所望の傷が完成するまで、パルス状のRF電力を前記チップに送達し続ける手段と、
をさらに備える、請求項1〜9のいずれか一項に記載のシステム。 - 前記第2の温度設定点は、前記第1の温度設定点よりも大きい、請求項10に記載のシステム。
- 前記再確立する手段におけるRF電力の前記パルス状の送達は、前記監視されたチップ温度を前記第2の温度設定点に維持するように制御される、請求項10又は11に記載のシステム。
- 前記第1の温度設定点は、前記チップ温度の初期定常状態値を備え、前記第2の温度設定点は、前記チップ温度の最終定常状態値を備える、請求項10〜12のいずれか一項に記載のシステム。
- アブレーション処置中のアブレーション・カテーテルへのエネルギーの送達を制御するためのシステムであって、
発生器を、エネルギー送達が開始されてから所望の時間が経過するまでの初期時間の間、傷を作成するのに十分な所望のRFアブレーション電力レベルに設定する手段と、
所望の温度設定点を入力する手段と、
前記初期時間の間、前記所望のRFアブレーション電力レベルで連続したエネルギーを送達する手段と、
カテーテル・チップ温度を監視する手段と、
監視された前記カテーテル・チップ温度が前記所望の温度設定点に達するか、またはそれに近づいたとき、前記アブレーション・カテーテルへのエネルギーのパルス状の送達を開始する手段と、
を備える、システム。
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