JPWO2018020577A1 - エネルギー制御装置、処置システム及びエネルギー制御装置の作動方法 - Google Patents
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Abstract
Description
本発明の第1の実施形態について、図1乃至図5を参照して説明する。図1は、処置システム1を示す図である。図1に示すように、処置システム1は、超音波処置具2と、エネルギー制御装置3と、を備える。ここで、図1において、矢印C1側を先端側とし、矢印C2側を基端側とする。基端側は、先端側とは反対側である。
次に、本発明の第2の実施形態について図6乃至図8を参照にして説明する。第2の実施形態は、第1の実施形態の構成を次の通り変形したものである。なお、第1の実施形態と同一の部分については同一の符号を付して、その説明は省略する。
なお、ある変形例では、図6及び図7においてステップS112〜S116の処理が行われず、代わりにカウント時間Tとは別のカウント時間T´に基づく処理が行われる。この場合、カウント時間T´は、PLL制御の開始時がゼロとなり、PLL制御の開始時からの経過時間を示す。本変形例では、ステップS104においてPLL制御が開始されると、プロセッサ35は、カウント時間T´が所定の時間T´th以上であるか否かを判断する。そして、カウント時間T´が所定の時間T´th以上の場合のみ、処理は、ステップS117に進む。これにより、PLL制御の開始時から所定の時間T´th経過するまでは、時間変化率ΔZ(t)が所定の閾値ΔZthより大きいか否かを判断するステップS109の処理は、行われない。したがって、本変形例でも第2の実施形態と同様に、PLL制御の開始時から超音波インピーダンスZが漸減している間において、エネルギー出力源47からの電気エネルギーの出力は、停止されず、かつ、低減されない。なお、所定の時間T´thは、前述した所定の時間Tth及び所定の閾値ΔZth等と同様にして、設定可能である。
本発明の別のある態様は、電気エネルギーが供給されることにより超音波振動を発生する超音波振動子と、前記超音波振動子で発生した前記超音波振動を用いて処置を行うエンドエフェクタと、を備える超音波処置具とともに用いられるエネルギー制御装置の作動方法であって、前記超音波振動子へ前記電気エネルギーを出力することと、前記超音波振動子へ出力される前記電気エネルギーに関する電気特性値を検出することと、前記電気特性値の検出結果に基づいて、前記電気特性値が漸増した後に漸減を開始する漸減開始時を検出することと、前記電気特性値の時間変化率を算出することと、前記漸減開始時より後において前記電気特性値の前記時間変化率が所定の閾値より大きくなったことに基づいて、前記超音波振動子への前記電気エネルギーの出力を停止又は低減させること、及び、前記時間変化率が前記所定の閾値より大きくなったことを告知することの少なくとも一方を行うことと、を備える。
Claims (9)
- 電気エネルギーが供給されることにより超音波振動を発生する超音波振動子と、前記超音波振動子で発生した前記超音波振動を用いて処置を行うエンドエフェクタと、を備える超音波処置具とともに用いられるエネルギー制御装置であって、
前記超音波振動子へ前記電気エネルギーを出力するエネルギー出力源と、
前記超音波振動子へ出力される前記電気エネルギーに関する電気特性値を検出する特性値検出部と、
前記特性値検出部での検出結果に基づいて、前記電気特性値が漸増した後に漸減を開始する漸減開始時を検出する漸減検出部と、
前記電気特性値の時間変化率を算出する算出部と、
前記漸減開始時より後において前記電気特性値の前記時間変化率が所定の閾値より大きくなったことに基づいて、前記エネルギー出力源に前記超音波振動子への前記電気エネルギーの出力を停止又は低減させること、及び、前記時間変化率が前記所定の閾値より大きくなったことを告知することの少なくとも一方を行う制御部と、
を具備するエネルギー制御装置。 - 前記制御部は、前記漸減開始時から所定の時間経過した以後において、前記電気特性値の前記時間変化率が前記所定の閾値より大きいか否かを判断し、前記時間変化率が前記所定の閾値より大きいと判断した場合は、前記エネルギー出力源に前記電気エネルギーの前記出力を停止又は低減させること、及び、前記時間変化率が前記所定の閾値より大きくなったことを告知することの少なくとも一方を行う、請求項1のエネルギー制御装置。
- 前記電気特性値が漸増を開始する漸増開始時を検出する漸増検出部をさらに具備し、
前記算出部は、前記漸増開始時からの前記電気特性値の増加量を算出し、
前記制御部は、前記漸減開始時から前記所定の時間経過するまでの間において、前記漸増開始時が検出され、かつ、前記漸増開始時からの前記電気特性値の前記増加量が所定の増加量より大きくなった場合は、前記電気特性値が再び漸減を開始するまで、前記時間変化率が前記所定の閾値より大きいか否かの判断を行わない、
請求項2のエネルギー制御装置。 - 前記漸減検出部は、前記漸増開始時からの前記電気特性値の前記増加量が前記所定の増加量より大きくなった後において、前記電気特性値が再び漸減を開始したことに基づいて、再び漸減を開始した時点に前記漸減開始時を更新する、請求項3のエネルギー制御装置。
- 前記特性値検出部は、前記超音波振動子のインピーダンス、前記エネルギー出力源から前記超音波振動子への出力電圧、及び、前記エネルギー出力源から前記超音波振動子への出力電力の少なくとも1つを、前記電気特性値として検出する、請求項1のエネルギー制御装置。
- 請求項1のエネルギー制御装置と、
前記超音波振動子及び前記エンドエフェクタを備える前記超音波処置具と、
を具備する処置システム。 - 前記エンドエフェクタは、前記超音波振動が伝達される第1の把持片と、前記第1の把持片との間が開閉可能な第2の把持片と、を備え、
前記第2の把持片は、前記第1の把持片と前記第2の把持片との間が閉じた状態において前記第1の把持片に当接可能なパッド部材を備える、
請求項6の処置システム。 - 前記超音波処置具は、前記所定の閾値が記憶される記憶媒体を備え、
前記制御部は、前記超音波処置具が前記エネルギー制御装置に接続されることにより、前記記憶媒体から前記所定の閾値を読取る、
請求項6の処置システム。 - 前記超音波処置具は、識別情報が記憶される記憶媒体を備え、
前記制御部は、前記超音波処置具が前記エネルギー制御装置に接続されることにより、前記記憶媒体から前記識別情報を読取り、読取った前記識別情報に基づいて前記所定の閾値を設定する、
請求項6の処置システム。
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