JP7022437B2 - Rfエネルギー及びマイクロ波エネルギーを送達するための電気手術装置及びそれの使用方法 - Google Patents
Rfエネルギー及びマイクロ波エネルギーを送達するための電気手術装置及びそれの使用方法 Download PDFInfo
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Description
第2部分の間に送達される複数のRFパルスのそれぞれと関連する検出電圧及び電流からインピーダンス値を決定するように、ジェネレーターを構成し得る。これらの確定したインピーダンス値は、電気手術器具によって送達される熱エネルギーの量を算出するために使用することができる。
本発明の別の態様で、電気手術用ジェネレーターからのRF電磁エネルギー及びマイクロ波電磁エネルギーを、RF電磁エネルギー及びマイクロ波電磁エネルギーを生体組織内に送達するための遠位先端アセンブリを有する電気手術器具に送達する方法を提供する。方法は、生体組織の止血を促進するための合成波形のRF電磁エネルギー及びマイクロ波電磁エネルギーを供給するためのジェネレーターを操作する方法を含み、合成波形は、主としてRF電磁エネルギーを含む第1部分と、第1部分に続く第2部分であって第2部分が主にマイクロ波電磁エネルギーを含む第2部分と、を含み、第2部分は複数のRFパルスを更に含み、第1部分の持続時間が事前に設定した持続期間閾値と合うもしくはそれを超えたとき、または第1部分中にジェネレーターによって測定したインピーダンスが事前に設定したインピーダンス閾値と合うもしくはそれを超えたとき、第1部分は第2部分へ移行する。
本明細書で「マイクロ波」は概して、400MHz~100GHzの周波数範囲、だが好ましくは1GHz~60GHzの範囲を示すために使用してよい。考慮される特定の周波数は、915MHz、2.45GHz、3.3GHz、5.8GHz、10GHz、14.5GHz及び24GHzである。それに対し本明細書で「高周波」または「RF」は、少なくとも3桁低い大きさ(例えば最高300MHz、好ましくは10kHz~1MHz)の周波数範囲を示すために使用する。
Claims (22)
- 高周波(RF)電磁エネルギー及びマイクロ波電磁エネルギーを生成するように構成した電気手術用ジェネレーターと、
前記RF電磁エネルギー及び前記マイクロ波電磁エネルギーを生体組織内に送達するための遠位先端アセンブリを有する双極電気手術器具と、
前記電気手術用ジェネレーターからの前記RF電磁エネルギー及び前記マイクロ波電磁エネルギーを前記双極電気手術器具に供給するために接続した供給ケーブルと、を備える電気手術装置であって、
前記電気手術用ジェネレーターが送達される前記RF電磁エネルギーと関連する電圧及び電流を検出するように構成され、
前記ジェネレーターが、
前記検出電圧及び電流からインピーダンスを決定するために、
前記生体組織の止血を促進するための合成波形の前記RF電磁エネルギー及び前記マイクロ波電磁エネルギーを供給するために操作可能であり、前記合成波形が、
主として前記RF電磁エネルギーを含む第1部分と、
前記第1部分に続く第2部分であって前記第2部分が主に前記マイクロ波電磁エネルギーを含む前記第2部分と、を含み、
前記第2部分が複数のRFパルスを更に含み、
前記ジェネレーターが、
前記第1部分の間、前記検出電圧及び電流からインピーダンスを測定するとともに、
前記第1部分の持続期間が事前に設定した持続時間閾値に合うもしくはそれを超えたとき、または、
前記第1部分中に前記測定したインピーダンスが事前に設定したインピーダンス閾値と合うもしくはそれを超えたとき、
前記合成波形が前記第1部分から前記第2部分へ移行するように構成される、前記電気手術装置。 - 前記事前に設定した持続時間閾値が1秒以下である、請求項1に記載の電気手術装置。
- 前記電気手術用ジェネレーターが、前記第1部分の始めに送達される前記RF電磁エネルギーと関連した前記検出電圧及び電流から初期インピーダンスを決定するように構成され、
前記事前に設定したインピーダンス閾値が、前記初期インピーダンスのプリセット比である、請求項1または2に記載の電気手術装置。 - 前記プリセット比が1.25以上である、請求項3に記載の電気手術装置。
- 前記ジェネレーターが、前記RF電磁エネルギーが前記第1部分に連続波信号として供給されるように構成される、請求項1~4のいずれか一項に記載の電気手術装置。
- 前記RF電磁エネルギーの前記連続波信号が90~120Vの範囲のRMS電圧を有する、請求項5に記載の電気手術器具。
- 前記ジェネレーターが、前記第1部分への前記マイクロ波電磁エネルギーの送達を防ぐように構成される、請求項1~6のいずれか一項に記載の電気手術装置。
- 前記ジェネレーターが、前記マイクロ波エネルギーが前記第2部分に連続波として供給されるように構成される、請求項1~7のいずれか一項に記載の電気手術装置。
- 前記ジェネレーターが、前記第2部分の間に送達される複数のRFパルスのそれぞれと関連する検出電圧及び電流からインピーダンス値を決定するように構成される、請求項1~8のいずれか一項に記載の電気手術装置。
- 前記ジェネレーターが、前記決定したインピーダンス値に基づき前記双極電気手術器具によって送達される熱エネルギーの量を算出するように構成される、請求項9に記載の電気手術装置。
- 前記ジェネレーターが、前記複数のRFパルスを前記マイクロ波電磁エネルギーと同時に供給するように構成される、請求項1~10のいずれか一項に記載の電気手術装置。
- 前記ジェネレーターが、前記複数のRFパルスを周期的な方法で供給するように構成される、請求項1~11のいずれか一項に記載の電気手術装置。
- 前記複数のRFパルスのそれぞれが前記生体組織に無視できる程度の熱効果を有するように構成される、請求項1~12のいずれか一項に記載の電気手術装置。
- 前記ジェネレーターが、
前記第2部分の間に送達される複数のRFパルスのそれぞれと関連する検出電圧及び電流から決定したインピーダンス値に基づき前記双極電気手術器具により供給される熱エネルギーの量を算出するため、及び、
前記ジェネレーターにより算出した前記熱エネルギーの量が事前に設定した熱エネルギー閾値に合うもしくはそれを超えたとき、または、
前記合成波形の持続期間が事前に設定した総持続時間閾値に合うもしくはそれを超えたとき、
前記第2部分を終了するために操作可能である、請求項1~13のいずれか一項に記載の電気手術装置。 - 前記事前に設定した総持続時間閾値が10秒以下である、請求項14に記載の電気手術装置。
- 前記事前に設定した総持続時間閾値が3秒以下である、請求項14に記載の電気手術装置。
- 前記ジェネレーターが、
前記複数のRFパルスのうちの1つと関連する前記検出電圧及び電流からのインピーダンス値を決定するために、ならびに、
前記決定したインピーダンス値が事前に設定した閾値と合うまたはそれを超えたとき、前記第2部分を終了するために操作可能である、請求項1~16のいずれか一項に記載の電気手術装置。 - 前記ジェネレーターが、
前記複数のRFパルスのうちの1つと関連する検出電圧及び電流から決定したインピーダンス値と、
前記マイクロ波電磁エネルギー用に選択した出力と、
前記双極電気手術器具から送達されるエネルギー量と、
前記遠位端アセンブリで組織の状態を示す情報と、のうちの任意の1つを示すように構成したディスプレイを備える、請求項1~17のいずれか一項に記載の電気手術装置。 - 前記遠位先端アセンブリが、誘電体材料によって分離された第1電極及び第2電極を備える、請求項1~18のいずれか一項に記載の電気手術装置。
- 第1及び第2の導体要素が、
前記遠位端アセンブリに隣接して位置する生体組織を通過して前記RF電磁エネルギーを導通させる作動及び戻り電極として機能するように、ならびに、
前記生体組織内に前記マイクロ波電磁エネルギーを放散する近接場アンテナとして機能するように構成される、請求項19に記載の電気手術装置。 - 処置部位に到達するために患者の身体内へ挿入するための器具コードを有する外科用スコープ装置を備える請求項1~20のいずれか一項に記載の電気手術装置であって、
前記器具コードが、それを通して伸びる器具チャネルを有し、
前記双極電気手術器具及び供給ケーブルが、前記器具チャネル内に適合して前記RF電磁エネルギーと前記マイクロ波電磁エネルギーを前記処置部位に供給するために必要な大きさにされる、前記電気手術装置。 - 前記器具チャネルの遠位端で前記マイクロ波電磁エネルギーの最大可能電力が40W以下である、請求項21に記載の電気手術装置。
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