JP5281140B2 - マルチプロングプローブを用いた高周波アブレーションシステム - Google Patents
マルチプロングプローブを用いた高周波アブレーションシステムInfo
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Description
ここで、図1を参照して、肝臓10は、腫瘍12を含む可能性があり、この腫瘍12について、リージョン(lesion)14が、2つの傘型電極アセンブリ16aおよび16bを使用して本発明により形成される。2つの傘型電極アセンブリ16aおよび16bは、後述するようにわずかな変更を有する。各電極アセンブリ16aおよび16bは、細い管状金属シャフト18aおよび18bを有する。金属シャフト18aおよび18bは、経皮的に肝臓10に挿入されるサイズにされている。シャフト18aおよび18bはそれぞれ、シャフト先端20aおよび20bで終端する。このシャフト先端20aおよび20bからは、ワイヤ32から形成される3叉電極22aおよび22bが突出する。シャフト18aおよび18bが、肝臓10内に適切に配置されると、ワイヤ32は、本体の外側に残っているプランジャ24によって広げられる。ワイヤ32は、広げられると、シャフト先端20aおよび20bの周りにほぼ等しい角度で分かれて半径方向に広がることにより突出する。ワイヤ32が限界まで露出した形は、ワイヤ32が、シャフト18aおよび18bから広げられた時に、自然に、放射状に外側に開くような弓形に事前に形成されている。シャフト18aおよび18bは、軸方向が平行に示されているが、これは必要ではなく、他の向きを使用することもできる。
次に図9を参照して、マルチ単極システム70が、電力出力72を有する電力発振器28を提供する。電力出力72の高周波信号は、単極双投スイッチ74の極に接続される。スイッチ74は、好ましくは20キロヘルツを越えるレートで切り替わる、当該技術において既知の技法による半導体スイッチとして実施されることが好ましいが、これに限定されるものではない。
次に図13を参照すると、電極101の代替的な実施形態が示されている。図7を参照して説明したように、ここでは、プローブまたは電極101は複数のプロング100、102、および104を有し、これらプロングはそれぞれ、例えば絶縁体106により他方のプロングとは絶縁し、これらのそれぞれは単一シャフト107内に収容され、このシャフトもまたプロング100、102、および104とは絶縁することができる。プロング100、102、および104は傘構成を呈するように外側に湾曲させてもよく、並列構成で配置されてもよく、または他の構成であってもよい。個々のプロング100、102、および104は、極の1つがRF電源28に接続される単極多投スイッチ108に接続される。接続点の数は電極101のプロングの数に等しく、ゆえに、図13に示すように三投スイッチである。また、接触プレートまたはグランドパッド50も提供される。動作の際、プローブ101の各プロング100、102、および104は、能動プロングとグランドパッド50との間で単極RFアブレーションを行うように個別に起動することができる。また、単極多投スイッチ108に接続されたコントローラ56を、プロング100、102、および104間の切り換え、並びに起動時間および他の変数を制御するように設けることができる。上述したように、プロング100、102、および104のそれぞれに温度センサ30を配置することができ、上述したように、センサ30から受け取った温度読み取り値に基づいて、または、上述したように、インピーダンス、電力、絶対時間、または1つもしくは2つ以上のプロングのインピーダンス差、温度差、もしくは電力差、または同様の制御入力などの他のパラメータに従って、プロング100、102、および104間の切り換えを行う(PDIコントローラとすることができる)コントローラ56に温度フィードバックが供給されることができる。1つのグランドパッド50が図示されているが、複数のグランドパッドが提供され得ること、およびグランドパッドは、下記のように、スイッチにより動作の入/切を切り換えることができることが理解されるであろう。さらに、シャフト107も電源28に選択的に接続することができる。プロング100、102、および104のそれぞれは電気的に独立し、個別に起動するため、プロング間に電気的相互作用はなく、例えば、アブレーションの中央領域の治療を高めることができる。
に従来の単極アブレーションおよび双極アブレーションを組み合わせることができる。さらに、種々の異なる適用パターン間を高速に切り換えることによって、プローブの形状を変えずに励起電力を制御することができる。
Claims (2)
- 互いに絶縁されている複数のプロングを有する電気プローブと、高周波電源と、前記複数のプロングと前記高周波電源とに接続されるとともに、前記複数のプロングとグランドとに接続されているスイッチシステムと、で構成される高周波アブレーションシステムにおいて、
前記複数のプロングの少なくとも2つの対の一方が、それぞれ、前記スイッチングシステムによって選択的に前記高周波電源に接続されるとともに、前記複数のプロングの少なくとも2つの対の他方が、それぞれ、前記スイッチングシステムによって選択的に前記グランドに接続され、かつ、
前記スイッチングシステムによって選択された前記プロングの対の間にアブレーション電流が供給されることを特徴とする高周波アブレーションシステム。 - 高温治療領域を前記プロングの対の間の中央に提供させるために、前記プロングの対が分離され対向されて前記中央の治療領域の周りに間隔を空けて配列され、かつ、前記スイッチシステムによって、前記プロングの対が前記高周波電源およびグランドに順次に接続され印加されることを特徴とする請求項1に記載の高周波アブレーションシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/911,927 | 2004-08-05 | ||
US10/911,927 US7520877B2 (en) | 2000-06-07 | 2004-08-05 | Radiofrequency ablation system using multiple prong probes |
Related Parent Applications (1)
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JP2007524992A Division JP4926961B2 (ja) | 2004-08-05 | 2005-07-29 | マルチプロングプローブを用いた高周波アブレーションシステム |
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JP2012101087A JP2012101087A (ja) | 2012-05-31 |
JP5281140B2 true JP5281140B2 (ja) | 2013-09-04 |
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JP2007524992A Active JP4926961B2 (ja) | 2004-08-05 | 2005-07-29 | マルチプロングプローブを用いた高周波アブレーションシステム |
JP2011276946A Active JP5281140B2 (ja) | 2004-08-05 | 2011-12-19 | マルチプロングプローブを用いた高周波アブレーションシステム |
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Country Status (7)
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US (1) | US7520877B2 (ja) |
EP (1) | EP1791485B1 (ja) |
JP (2) | JP4926961B2 (ja) |
KR (2) | KR101425110B1 (ja) |
AU (1) | AU2005271471B2 (ja) |
CA (1) | CA2575792C (ja) |
WO (1) | WO2006017666A2 (ja) |
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JP2008508946A (ja) | 2008-03-27 |
KR101425110B1 (ko) | 2014-08-13 |
KR20070050459A (ko) | 2007-05-15 |
CA2575792C (en) | 2011-11-29 |
CA2575792A1 (en) | 2006-02-16 |
AU2005271471A2 (en) | 2006-02-16 |
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