[go: up one dir, main page]

JP2004016505A - Electronic scan type ultrasonic endoscope - Google Patents

Electronic scan type ultrasonic endoscope Download PDF

Info

Publication number
JP2004016505A
JP2004016505A JP2002176075A JP2002176075A JP2004016505A JP 2004016505 A JP2004016505 A JP 2004016505A JP 2002176075 A JP2002176075 A JP 2002176075A JP 2002176075 A JP2002176075 A JP 2002176075A JP 2004016505 A JP2004016505 A JP 2004016505A
Authority
JP
Japan
Prior art keywords
ultrasonic
endoscope
observation
unit
observation unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2002176075A
Other languages
Japanese (ja)
Other versions
JP4153731B2 (en
Inventor
Shinichi Miyamoto
宮本 眞一
Akiko Mizunuma
水沼 明子
Kenichi Nishina
仁科 研一
Yusuke Ichikawa
市川 祐介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Corp filed Critical Olympus Corp
Priority to JP2002176075A priority Critical patent/JP4153731B2/en
Publication of JP2004016505A publication Critical patent/JP2004016505A/en
Application granted granted Critical
Publication of JP4153731B2 publication Critical patent/JP4153731B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Ultra Sonic Daignosis Equipment (AREA)
  • Endoscopes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic scan type ultrasonic endoscope excellent in serviceability such that it is capable of observation under optimal conditions using an endoscopic observing part and an ultrasonic observing part. <P>SOLUTION: This electronic scan type ultrasonic endoscope 2 includes the endoscopic observing part 20 having provided at the hard tip 6 of an insertion part 11 an illuminating optical system for providing illumination in the direction of the insertion axis of the endoscope and an observing optical system 21a for direct viewing; and the ultrasonic observing part 30 formed with an ultrasonic scan surface 32 on which a plurality of piezoelectric elements 31 are arranged, with the range of electronic scans approximately covering areas alongside the direction of the insertion axis. The endoscope has an observing-part moving means for varying the relative positions between the endoscopic observing part 20 and the ultrasonic scan surface 32 of the ultrasonic observing part 30; the observing-part moving means moves at least one of the endoscopic observing part 20 or the ultrasonic observing part 30 in the direction of the insertion axis. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、観察光学系及び照明光学系を有する内視鏡観察部と、電子走査して超音波画像を得る超音波観察部とを備えた電子走査式超音波内視鏡に関する。
【0002】
【従来の技術】
近年、体腔内に挿入可能な内視鏡の挿入部の先端側に超音波観察部を設け、この超音波観察部によって超音波断層画像を得られるようにするとともに、この内視鏡に設けた処置具挿通用チャンネルを通して体腔内に処置具を導いて、病変部の組織を採取する等の診断や処置を行える電子走査式或いは機械走査式の超音波内視鏡が実用化されている。
【0003】
従来の超音波内視鏡では超音波観察部を先端面から突出させた構造であるため、観察光学系の観察視野を確保するために視野範囲を挿入方向に対して斜めの斜視光学系で構成していた。しかし、術者からは内視鏡観察を広範囲にわたって、できるだけ直視に近い状態で行いたいという要望があった。
【0004】
そのため、機械走査式の超音波内視鏡では例えば特開2001−292997号公報に示すように操作部を大型化させることなく、簡単な操作で超音波振動子部を挿入部の先端部から突没させて超音波検査を行える超音波内視鏡が示されている。
【0005】
【発明が解決しようとする課題】
しかしながら、電子走査式の超音波内視鏡で、前記特開2001−292997号公報の超音波内視鏡で示したように超音波観察部が突没する構造にすると、多数の圧電素子から延出している信号線の一部が断線して観察に支障を来すおそれがある。
【0006】
また、機械走査式、電子走査式に関わらず、超音波内視鏡観察下で病変部の組織の採取を行う際、処置具挿通孔の導出口から病変部に向けて穿刺針を穿刺するとき、この穿刺針の突出量が大きくなると穿刺針の先端が超音波走査範囲から外れて、超音波画像として描出されなくなるおそれがあった。
【0007】
本発明は上記事情に鑑みてなされたものであり、内視鏡観察部による観察と超音波観察部による観察を最良の状態で行える、使い勝手に優れた電子走査式超音波内視鏡を提供することを目的にしている。
【0008】
【課題を解決するための手段】
本発明の電子走査式超音波内視鏡は、挿入部の先端部を構成する先端硬質部に、内視鏡挿入軸方向を照らす照明光学系及び直視する観察光学系を設けた内視鏡観察部と、複数の圧電素子を配列して挿入軸方向に対して略側方を超音波走査範囲とする超音波走査面を形成した超音波観察部とを具備する電子走査式超音波内視鏡であって、
前記内視鏡観察部と、前記超音波観察部の超音波走査面との相対位置を変化させる観察部移動手段を設けている。
【0009】
そして、前記観察部移動手段は、前記内視鏡観察部又は前記超音波観察部の少なくとも一方を、挿入軸方向に対して移動させる進退移動手段である。
【0010】
または、前記観察部移動手段は、前記超音波観察部を前記観察光学系の観察方向に対して回動させる回動手段である。
【0011】
これらの構成によれば、観察部移動手段によって観察部を適宜移動させることによって、内視鏡観察部による内視鏡観察と超音波観察部による超音波観察とを最良の状態で行える。
【0012】
そして、進退移動手段では、観察光学系及び照明光学系の位置を超音波観察部によって遮られない位置、又は超音波走査面を内視鏡観察部によって遮られない位置に移動させて観察を行う。
【0013】
また、回動手段では、超音波観察部を例えば上下方向に変化させることによって、前記観察光学系の観察視野範囲を広範囲にして内視鏡観察を行えるとともに、前記超音波観察部の超音波走査範囲を変化させて広範囲にわたる超音波観察を行える。加えて、穿刺針の先端をとらえるように超音波走査範囲を移動させての超音波観察を行える。
【0014】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態を説明する。
図1ないし図11は本発明の第1実施形態に係り、図1は電子走査式超音波内視鏡装置の構成を説明する図、図2は進退移動手段を有する超音波内視鏡の先端硬性部の構成を説明する図、図3は図2のA−A線断面図、図4は中途部の一部にほぐした状態の素線が位置するイメージガイドを説明する図、図5は信号線を複数本ずつガイドチューブの外側に引き出して信号線の断線を防止する構成を説明する図、図6は内視鏡観察部の突出状態を説明する図、図7は超音波観察部の突出状態を説明する図、図8は電子走査式超音波内視鏡の他の構成の進退移動手段を説明する図、図9は電子走査式超音波内視鏡の別の構成の進退移動手段を説明する図、図10は電子走査式超音波内視鏡のまた他の構成の進退移動手段を説明する図、図11は電子走査式超音波内視鏡のまた別の構成の進退移動手段を説明する図である。
なお、図11(a)は内視鏡観察状態を説明する図、図11(b)は超音波観察状態を説明する図である。
【0015】
図1に示すように本実施形態の電子走査式超音波内視鏡装置(以下、超音波内視鏡装置と略記する)1は、電子走査式超音波内視鏡(以下、内視鏡と略記する)2と、照明光を供給する光源部(不図示)及び図示しない撮像素子の駆動及び受信信号の各種信号処理を行って内視鏡画像を生成する信号処理部を具備する内視鏡観察装置3と、後述する圧電素子の駆動及び受信信号の各種信号処理を行って超音波診断画像を生成する信号処理部を具備する超音波観察装置4と、この超音波観測装置4及び前記内視鏡観察装置3で生成された診断画像を表示するモニタ5とを備えて主に構成されている。
【0016】
前記内視鏡2は、体腔内に挿入される細長の挿入部11と、この挿入部11の基端側に位置する操作部12と、この操作部12の側部から延出するユニバーサルコード13とで主に構成されている。
【0017】
前記ユニバーサルコード13の基端部には前記内視鏡観察装置3の光源部に接続される内視鏡コネクタ14が設けられている。この内視鏡コネクタ14からは前記超音波観測装置4に電気的に接続される超音波コネクタ15aを有する超音波ケーブル15が延出するとともに、前記内視鏡観察装置3の信号処理部に電気接続される図示しない電気コードが着脱自在に接続される電気コネクタ14aが設けられている。
【0018】
前記挿入部11は、先端側から順に硬質部材で形成した先端硬性部6、この先端硬性部6の基端側に位置する湾曲自在な湾曲部7、この湾曲部7の基端側に位置して前記操作部12の先端側に至る細径かつ長尺で可撓性を有する可撓管部8を連設して構成されている。
【0019】
前記先端硬性部6には、直視による内視鏡観察を行う観察光学系及び照明光学系を進退自在に構成した内視鏡観察部20と、超音波を送受する複数の圧電素子を配列して構成した超音波走査面を有する進退自在な超音波観察部30とが設けられている。
【0020】
なお、前記操作部12には前記湾曲部7を所望の方向に湾曲制御するアングルノブ16、送気及び送水操作を行うための送気・送水ボタン17a、吸引操作を行うための吸引ボタン17bや、体腔内に導入する処置具の入り口となる処置具挿入口18等の他に前記内視鏡観察部20を進退移動させる内視鏡観察部用操作ノブ19a及び前記超音波観察部30を進退移動させる超音波観察部用操作ノブ19bが設けられている。符号9は患者の口腔に配置されるマウスピースである。
【0021】
図2及び図3に示すように前記先端硬性部6を構成する先端部材6aには凸部6bが形成されており、この凸部6bの段付透孔6cに直視観察を行う内視鏡観察部20が摺動自在に設けられるとともに、前記先端部材6aに対して突出して挿入軸方向に対して略側方(本図では上側)を超音波走査範囲にした超音波観察部30が摺動自在に設けられている。この構成のとき、前記内視鏡観察部20の光学視野範囲の一部は前記超音波観察部30によって遮られ、前記超音波観察部30の超音波走査範囲の一部が前記凸部6bによって遮られる。
【0022】
前記内視鏡観察部20は、前記観察光学系21及び照明光学系22が配設される前記先端部材6aに対して摺動自在な内視鏡本体部材(以下、内視鏡部本体と略記する)23と、この摺動する内視鏡部本体23と前記先端部材6aとのあいだの水密を図る伸縮自在で蛇腹状部を設けたチューブ体で構成した水密部材24と、前記内視鏡部本体23の押し引き操作を行う進退移動手段である内視鏡本体操作チューブ25とで主に構成されている。
【0023】
前記内視鏡部本体23は、回転することを防止するため断面形状を例えば略楕円形状に形成した摺動部23aと、断面形状を略円形に形成したパイプ形状部23bとで構成されており、このパイプ形状部23bには前記内視鏡本体操作チューブ25の先端部が固設されている。
前記水密部材24の先端部は、前記内視鏡部本体23の摺動部23aの基端面に一体的に固定され、基端部は前記先端部材6aに一体に固定されている。
【0024】
前記内視鏡本体操作チューブ25は、樹脂チューブ又はブレードを網み込んだ樹脂チューブによって構成されており、基端部は前記内視鏡観察部用操作ノブ19aに連結固定されるようになっている。この内視鏡本体操作チューブ25内には前記観察光学系を構成するイメージガイドファイバ26及び前記照明光学系を構成するライトガイドファイバ(不図示)が挿通している。そして、この内視鏡本体操作チューブ25は、挿入部11内に挿通配置された内視鏡用ガイドチューブ27内を挿通している。
【0025】
一方、前記超音波観察部30は、前記先端部材6aに対して摺動自在で超音波を送受する複数の圧電素子31,…,31を配列して構成した超音波走査面32を設けた超音波本体部材(以下、超音波部本体と略記する)33と、この超音波部本体33と前記先端部材6aとのあいだの水密を図る伸縮自在で蛇腹状部を設けたチューブ体で構成した水密部材34と、前記超音波部本体33の押し引き操作を行う進退移動手段である超音波本体操作チューブ35とで主に構成されている。
【0026】
前記超音波部本体33は回り止めとなる平面部33aを設けた摺動部33bを有し、この摺動部33bの基端部、つまり超音波部本体33の基端部に前記超音波本体操作チューブ35の先端部が固定されている。この超音波本体操作チューブ35の基端部は、前記操作部12に設けた超音波観察部用操作ノブ19bに連結固定されるようになっている。この超音波本体操作チューブ35内には前記圧電素子31から延出する信号線36が挿通している。
【0027】
なお、前記超音波本体操作チューブ35は前記内視鏡本体操作チューブ25と同様、樹脂チューブ又はブレードを網み込んだ樹脂チューブである。また、前記超音波本体操作チューブ35は、挿入部11内に挿通配置されている超音波用ガイドチューブ37内を挿通している。さらに、前記水密部材34の先端部は前記超音波部本体33の所定面に一体に固定され、基端部は前記先端部材6aの所定面に一体に固定されている。又、図2の符号7aは湾曲駒、符号7bは外皮チューブ、図3の符号6dは前記平面部33aに対応する平面を有する超音波本体用透孔、符号6eは前記処置具挿入口18から挿入された処置具が挿通する処置具チャンネルである。
【0028】
図4に示すように前記内視鏡用ガイドチューブ27の基端部は、前記操作部12内に設けられているガイドチューブ固定部材41に固設されている。前記内視鏡本体操作チューブ25の基端部は、このガイドチューブ固定部材41近傍で前記内視鏡観察部用操作ノブ19aに一体なスライド部材42に固設されている。
【0029】
そして,前記内視鏡本体操作チューブ25内を挿通してこのスライド部材42上に導かれたイメージガイドファイバ26及び図示しないライトガイドファイバの中途部には、被覆部材の一部を剥してライトガイド素線をほぐして弛んだ状態にした素線弛み部26aが設けられている。このことよって、ライドガイド素線が切断されることなく前記内視鏡観察部20が進退移動する構成になっている。
【0030】
なお、前記観察光学系を固体撮像素子を設けて構成する際には、この固体撮像素子から延出する信号線に弛るみ部を持たせ、その弛み部を例えばスライド部材42上に配置する。
【0031】
一方、図5に示すように前記超音波観察部用操作ノブ19bに連結固定される超音波本体操作チューブ35の基端部には押し引き操作性を向上させる目的で樹脂部材等の充填材51を封入している。また、前記超音波本体操作チューブ35の側面部及びガイドチューブ37の側面部には例えば千鳥状配置で複数のスリット35a、37aが形成されている。これらスリット35a、37aからは前記圧電素子31から延出した信号線36が複数本ずつ前記ガイドチューブ37の外周側に弛んだ状態で引き出されている。なお、前記スリット35aとスリット37aとは略同位置に形成されており、スリット37aをスリット35aより細長に形成している。
【0032】
上述のように構成した超音波内視鏡装置1の作用を説明する。
内視鏡観察を行う場合、前記操作部12に設けられている内視鏡観察部用操作ノブ19aを所定の方向に手元操作する。すると、この内視鏡観察部用操作ノブ19aの回動動作に伴って前記スライド部材42、内視鏡本体操作チューブ25が前方側に移動される。このことよって、図6の矢印に示すように内視鏡観察部20を構成する内視鏡部本体23が前方側に移動して突出した状態になる。この突出動作のとき、前記イメージガイドファイバ26及びライトガイドファイバはスライド部材42上で弛んだ状態になっているので、前記イメージガイドファイバ26及びライトガイドファイバに負荷がかからない状態で、前記内視鏡部本体23は挿入軸方向にスムーズに移動する。
【0033】
そして、前記内視鏡部本体23が所定の位置まで突出することによって、観察光学系21の光学視野範囲が前記超音波観察部30によって遮られることなく良好な内視鏡観察状態なる。
【0034】
一方、超音波観察を行う場合には、前記操作部12に設けられている超音波観察部用操作ノブ19bを所定方向に手元操作する。すると、この超音波観察部用操作ノブ19bの回動動作に伴って前記超音波本体操作チューブ35が前方側に移動する。そして、図7の矢印に示すように超音波観察部30を構成する超音波部本体33が前方側に移動して突出状態になる。このことによって、超音波観察部30に設けられている超音波走査面32の超音波走査範囲が前記内視鏡観察部20や凸部6bによって遮られることなく良好な超音波観察を行える。
【0035】
なお、前記信号線36は、スリット35a、37aから引き出されて弛んだ状態になっているので、この信号線36に負荷がかからない状態で、前記超音波部本体33は挿入軸方向にスムーズに移動する。
【0036】
このように、先端硬性部に直視観察を行う内視鏡観察部を摺動自在に設けるとともに、複数の圧電素子を配列して構成した超音波走査面を有する超音波観察部を摺動自在に設け、操作部に内視鏡観察部用操作ノブ及び超音波観察部用操作ノブを設けることによって、適宜、内視鏡観察部用操作ノブ又は超音波観察部用操作ノブを操作して内視鏡観察部又は超音波観察部を進退移動して挿入軸方向の位置を変化させることによって、最良の光学視野範囲又は超音波走査範囲を確保して良好な内視鏡観察及び超音波観察を行うことができる。
【0037】
また、内視鏡観察部から延出するライトガイドファイバ及びイメージガイドファイバの中途部に素線弛み部を設ける構成、或いは撮像素子から延出する信号線を弛ませる構成、超音波観察部から延出する信号線を超音波本体操作チューブのスリット及びガイドチューブのスリットから引き出して弛んだ状態にすることによって、内視鏡観察部及び超音波観察部を挿入を軸方向に進退移動させたときファイバ類及び信号線が断線させることを確実に防止することができる。
【0038】
なお、本実施形態においては内視鏡観察部20と超音波観察部30とをそれぞれ挿入部軸方向に対して進退自在な構成としたが、図8に示すように超音波観察部30Aを先端面から所定量突設させた状態で固定して、内視鏡観察部20Aだけを進退移動させる構成にしてもよい。この構成のとき、前記摺動部23aを段付透孔6c内に収納状態にすることによって、前記超音波観察部30Aに設けた超音波操作面32の超音波走査範囲が確保され、前記内視鏡観察部20Aを突出状態にすることによって光学視野範囲が前記超音波観察部30によって遮られることがなくなる。このことによって、内視鏡観察部20Aを適宜突没させることによって、光学視野範囲又は超音波走査範囲を確保して所望の観察を行うことができる。
【0039】
なお、この実施形態においては、前記内視鏡部本体23のパイプ形状部23aに周り止め用の平面部を設けることによって摺動部23aが回転することを防止している。
【0040】
また、図9に示すように超音波観察部30Bが配置される段部6fを形成するように長めに形成した凸部に内視鏡観察部20Bを固定状態にし、超音波観察部30Bだけを進退移動させる構成にしてもよい。この構成によれば、超音波観察部30Bを突出させることによって超音波操作面32の超音波走査範囲が確保され、超音波観察部30Bを段部6f内に引き戻し配置することによって観察光学系21の光学視野範囲が確保される。このことによって、超音波観察部30Bを適宜突没させて、光学視野範囲又は超音波走査範囲を確保して所望の観察を行うことができる。
【0041】
さらに、上述した実施形態においては内視鏡観察部及び超音波観察部の進退操作を、操作部に設けた内視鏡観察部用操作ノブ、超音波観察部用操作ノブの手元操作によって行う構成にしていたが、図10に示すように例えば空気等の流体の注入及び排出を行う流体チューブ61及びシリンダ部62と、ピストン部63となる超音波部本体33Aとを設けて進退移動手段を構成するようにしてもよい。
【0042】
加えて、本実施形態においては前記超音波部本体33Aの進退移動の際に前記圧電素子31からそれぞれ延出している信号線36が断線することを防止するため、シリンダ部62を構成する円筒部材64の内部空間を信号線配置空間とし、この空間部内に前記信号線36をほぐして弛ませた状態で螺旋状にまとめて収納する。そして、この信号線36のひとまとめに構成した先端側部を前記円筒部材64に固定して操作部方向に延出する。なお、ほぐした信号線36を用いる代わりに、螺旋状に形成したフレキシブル基板を用いる構成にしてもよい。
【0043】
このことによって、シリンダ62内に流体を注入することによって超音波部本体33Aが突出するように前方側に移動し、このシリンダ62内の流体を排出することによって超音波部本体33Aが基端側に戻るように移動する。つまり、流体の注入或いは排出を適宜行うことによって前記超音波部本体33Aを進退移動させて光学視野範囲又は超音波走査範囲を確保して所望の観察を行うことができる。
【0044】
又、前記内視鏡観察部、超音波観察部の進退を、操作部に設けた操作ノブや、流体の注入/排出で行う代わりに、図11(a)に示すように先端部材6a内に超音波部本体33Bを収納する本体収納空間70を形成し、この本体収納空間70に配置される超音波部本体33Bにラック71を設け、先端部材6aの所定位置に前記ラック71に噛合するギア72を配置してラックピニオン部を設けるとともに、処置具チャンネル73に挿通されるシース部材74の外周面の所定位置に前記ラックピニオン部のギア72に噛合する噛合部74aを設けて進退移動手段を構成するようにしてもよい。
【0045】
このことによって、図11(b)に示すように前記シース部材74の先端部を処置具開口から突出させるように移動させることにより、このシース部材74に設けられている噛合部74aが前記ギア72を回転させる。すると、このギア72の回転に伴って、前記ラック72が前方側に移動して超音波観察部30Cが内視鏡先端面から突出した状態になる。一方、この状態で前記シース部材74を処置具チャンネル73内に納めるように引き戻し操作を行うことにより、前記ラック72が基端側に移動して超音波観察部30Cが本体収納空間70内に収納される。
【0046】
このように、ラックピニオン部を構成するギア72に噛合する噛合部74aを設けたシース部材74を適宜突没動作することによって、前記超音波本体部33Bを進退移動させて、光学視野範囲又は超音波走査範囲を確保して所望の観察を行うことができる。
【0047】
本実施形態においては、前記ラックピニオン部を構成するラック71とギア72との間にスリップ機構を設けている。このスリップ機構は、例えば軸部75aに対して所定の弾性力で軸支されるスリップギア75で構成したものである。このスリップギア75は、前記超音波観察部30Cが例えば体腔内の体壁や粘膜等に接触してラック71の移動抵抗が所定状態より増大しているときには、前記シース部材74を突出させて超音波観察部30Cを移動させようとしても、ギア72の回転がラック72へ伝達されることを阻止するように作用する。
【0048】
このことにより、前記超音波観察部30Cが体壁や粘膜等に接触している状態のとき、超音波観察部30Cがさらに突出して体壁等に傷をつける不具合の発生が確実に防止される。
【0049】
図12ないし図14は本発明の第2実施形態にかかり、図12は回動手段を有する超音波内視鏡の先端硬性部の構成を説明する図、図13は超音波内視鏡の作用を説明する図、図14は超音波観察部の回動と穿刺ラインの修正方法を説明する図である。
【0050】
なお、図12(a)は長手方向の断面図、図12(b)は図12(a)のB−B線断面図、図14(a)は画面上に表示される超音波観察部を示す図、図14(b)は画面上に表示される超音波観察部を示す図である。
【0051】
本実施形態の電子走査式の超音波内視鏡では、前記第1実施形態で示したように内視鏡観察部又は超音波観察部の少なくとも一方を挿入軸方向に対して進退移動させる代わりに、図12(a)及び図13に示すように超音波観察部30Dを矢印A、Bに示すように回動させて上側であった超音波走査範囲を前方上側に変化させる構成にしている。
【0052】
そのため、前記図11(a)、(b)に示したラックピニオン部を構成していたラックの代わりに前記超音波観察部30Dを構成する超音波部本体33Bの所定位置に第2のギア77を一体的に設けてこの超音波部本体33Bを回動させる構成にしている。なお、前記超音波観察部30Dは先端面から突出した構成であり、その他の構成は前記図11(a),(b)に示した構成と同様であり、同部材には同符合を符して説明を省略する。
【0053】
上述のように超音波内視鏡2Aを構成したことによって、図13に示すように前記シース部材74の先端部を処置具開口から突出させるように移動させることにより、このシース部材74に設けられている噛合部74aが前記ギア72を回転させ、このギア72の回転が前記スリップギア75を介して前記第2のギア77に伝達される。
【0054】
すると、超音波観察部30が一点鎖線に示した状態から実線に示す状態まで回転するとともに、超音波走査範囲も一点鎖線で示す上方向から実線で示す前方上方向に変化する。また、観察光学系の光学視野範囲も二点鎖線に示す範囲から実線に示す範囲に広がる。このことによって、例えば前記シース部材74から破線に示すように穿刺針78を突出させたとき、この穿刺針78の先端部78aを確実に超音波操作範囲内に位置させた状態で病変部の組織の採取を行える。
【0055】
一方、この状態で前記シース部材74を処置具チャンネル73内に納めるように引き戻し操作することにより、前記第2のギア77が逆方向に回転して超音波観察部30Dの超音波走査範囲及び観察光学系の光学視野範囲が直線に示した状態から元の一点鎖線及び二点鎖線に示す状態に戻る。
【0056】
このように、ギア72に噛合する噛合部74aを設けたシース部材74を適宜突没動作することにより、第2のギア77を設けた超音波部本体が回動して、観察光学系の光学視野範囲による広範囲の直視観察や、超音波走査範囲を上側から前方上側に変化させての観察を行うことができる。
【0057】
ところで、前記第2実施形態においては超音波観察部30Dが回動することにより、この超音波観察部30Dの超音波走査範囲が上側から前方上側への変化等に伴って穿刺ラインを変化させる必要がある。
【0058】
そのため、符号79に示す回動角度検出手段として例えば歪みゲージ等を設け、この歪みゲージの抵抗値の変化を基に、前記内視鏡観察装置3又は超音波観測装置4に設けられている図示しない演算処理部で回動量を算出し、その算出した回動量に基づいて穿刺ラインの修正を行ったり、或いは、図14(a)、(b)に示すようにモニタ5の画面5a上に表示される超音波観察部30Dの上面の見え方を基に、前記内視鏡観察装置3に設けられている画像処理部及び前記演算処理部で回動量を算出し、その算出した回動量に基づいて穿刺ラインの修正を行う。
【0059】
尚、本発明は、以上述べた実施形態のみに限定されるものではなく、発明の要旨を逸脱しない範囲で種々変形実施可能である。
【0060】
[付記]
以上詳述したような本発明の上記実施形態によれば、以下の如き構成を得ることができる。
【0061】
(1)挿入部の先端部を構成する先端硬質部に、内視鏡挿入軸方向を照らす照明光学系及び直視する観察光学系を設けた内視鏡観察部と、複数の圧電素子を配列して挿入軸方向に対して略側方を超音波走査範囲とする超音波走査面を形成した超音波観察部とを具備する電子走査式超音波内視鏡において、
前記内視鏡観察部と、前記超音波観察部の超音波走査面との相対位置を変化させる観察部移動手段を設けた電子走査式超音波内視鏡。
【0062】
(2)前記観察部移動手段は、前記内視鏡観察部又は前記超音波観察部の少なくとも一方を、挿入軸方向に移動させる進退移動手段である付記1に記載の電子走査式超音波内視鏡。
【0063】
(3)前記内視鏡観察部又は前記超音波観察部は、
前記先端硬質部に対して摺動自在で前記観察光学系及び照明光学系又は前記超音波走査面が配設される本体部材と、
この本体部材と前記先端硬質部とのあいだの水密を図る伸縮自在な水密部材と、
を具備する付記1に記載の電子走査式超音波内視鏡。
【0064】
(4)前記進退移動手段は、前記本体部材の基端部に先端部が固定されて押し引き操作を行う操作チューブである付記2又は付記3に記載の電子走査式超音波内視鏡。
【0065】
(5)前記進退移動手段は、シリンダ内に配置されたピストンとなる前記本体部材を進退させる流体を供給又は吸引する流体チューブである付記2又は付記3に記載の電子走査式超音波内視鏡。
【0066】
(6)前記操作チューブ内に、前記超音波観察部の圧電素子から延出する信号線が挿通する付記4又は付記5に記載の電子走査式超音波内視鏡。
【0067】
(7)前記操作チューブ内に、前記内視鏡観察部の観察光学系を構成する撮像素子から延出する信号線又はイメージガイドファイバ及び照明光学系を構成するライトガイドファイバが挿通する付記4又は付記5に記載の電子走査式超音波内視鏡。
【0068】
(8)前記操作チューブに、これらチューブ内を挿通する前記信号線又はガイドファイバが断線することを防止する断線防止手段を設けたことを特徴とする付記6又は付記7に記載の電子走査式超音波内視鏡。
【0069】
(9)前記断線防止手段は、前記信号線又はガイドファイバを外周側に導く、前記チューブの中途部に配列した透孔である付記8に記載の電子走査式超音波内視鏡。
【0070】
(10)前記断線防止手段は、前記信号線又はライトガイドファイバをほぐした弛み部である付記8に記載の電子走査式超音波内視鏡。
【0071】
(11)前記水密部材は、伸縮自在な弾性部材で形成したチューブ体である付記3に記載の電子走査式超音波内視鏡。
【0072】
(12)前記水密部材は、蛇腹状部を設けたチューブ体である付記3に記載の電子走査式超音波内視鏡。
【0073】
(13)前記進退移動手段を、前記超音波観察部を構成する本体部材の基端側に設けたラックピニオン部と、このラックピニオン部の歯車に噛合する噛合部を外周面に設けた処置具とで構成する付記2又は付記3に記載の電子走査式超音波内視鏡。
【0074】
(14)前記処置具はシース部材であり、このシース部材の先端部外周面に前記噛合部を設けた付記13記載の電子走査式超音波内視鏡。
【0075】
(15)前記観察部移動手段は、前記超音波観察部を前記観察光学系の観察方向に対して回動させる回動手段である付記1に記載の電子走査式超音波内視鏡。
【0076】
(16)前記回動手段は、前記超音波観察部を構成する本体部材の基端側に一体に設けた第2歯車部とこの歯車に噛合する歯車と、この歯車に噛合する噛合部を外周面に設けた処置具である付記15に記載の電子走査式超音波内視鏡。
【0077】
(17)前記処置具の突出量の変化に伴い、前記超音波観察部を構成する本体部材が回動する付記16に記載の電子走査式超音波内視鏡。
【0078】
(18)前記歯車と歯車との間にスリップ機構を設けた付記16記載の電子走査式超音波内視鏡。
【0079】
(19)前記超音波観察部に回動角度検出手段を設けた付記16に記載の電子走査式超音波内視鏡。
【0080】
(20)前記回動角度検出手段は歪みゲージである付記19に記載の電子走査式超音波内視鏡。
【0081】
【発明の効果】
以上説明したように本発明によれば、内視鏡観察部による観察と超音波観察部による観察を最良の状態で行える、使い勝手に優れた電子走査式超音波内視鏡を提供することができる。
【図面の簡単な説明】
【図1】図1ないし図11は本発明の第1実施形態に係り、図1は電子走査式超音波内視鏡装置の構成を説明する図
【図2】進退移動手段を有する超音波内視鏡の先端硬性部の構成を説明する図
【図3】図2のA−A線断面図
【図4】中途部の一部にほぐした状態の素線が位置するイメージガイドを説明する図
【図5】信号線を複数本ずつガイドチューブの外側に引き出して信号線の断線を防止する構成を説明する図
【図6】内視鏡観察部の突出状態を説明する図
【図7】超音波観察部の突出状態を説明する図
【図8】電子走査式超音波内視鏡の他の構成の進退移動手段を説明する図
【図9】電子走査式超音波内視鏡の別の構成の進退移動手段を説明する図
【図10】電子走査式超音波内視鏡のまた他の構成の進退移動手段を説明する図
【図11】電子走査式超音波内視鏡のまた別の構成の進退移動手段を説明する図
【図12】図12ないし図14は本発明の第2実施形態にかかり、図12は回動手段を有する超音波内視鏡の先端硬性部の構成を説明する図
【図13】超音波内視鏡の作用を説明する図
【図14】超音波観察部の回動と穿刺ラインの修正方法を説明する図
【符号の説明】
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic scanning ultrasonic endoscope including an endoscope observation unit having an observation optical system and an illumination optical system, and an ultrasonic observation unit that obtains an ultrasonic image by electronic scanning.
[0002]
[Prior art]
In recent years, an ultrasonic observation unit is provided on the distal end side of an insertion portion of an endoscope that can be inserted into a body cavity, and an ultrasonic tomographic image can be obtained by the ultrasonic observation unit, and the ultrasonic observation unit is provided in the endoscope. 2. Description of the Related Art An electronic scanning or mechanical scanning ultrasonic endoscope capable of guiding a treatment tool into a body cavity through a treatment tool insertion channel and performing diagnosis and treatment such as sampling of a diseased part has been put to practical use.
[0003]
The conventional ultrasonic endoscope has a structure in which the ultrasonic observation section protrudes from the distal end surface, so the field of view is configured with a perspective optical system oblique to the insertion direction to secure the observation field of view of the observation optical system. Was. However, there has been a request from the surgeon to perform endoscopic observation over a wide range and in a state as close as possible to direct vision.
[0004]
Therefore, in a mechanical scanning type ultrasonic endoscope, for example, as shown in Japanese Patent Application Laid-Open No. 2001-292997, the ultrasonic vibrator portion can be projected from the distal end portion of the insertion portion by a simple operation without increasing the size of the operation portion. An ultrasonic endoscope which can be immersed to perform an ultrasonic examination is shown.
[0005]
[Problems to be solved by the invention]
However, when an electronic scanning type ultrasonic endoscope has a structure in which an ultrasonic observation section is protruded and retracted as shown in the ultrasonic endoscope of JP-A-2001-292997, it is difficult to extend from many piezoelectric elements. There is a possibility that a part of the output signal line is broken and obstructs observation.
[0006]
In addition, regardless of the mechanical scanning type or the electronic scanning type, when puncturing the puncture needle from the outlet of the treatment tool insertion hole toward the lesion when collecting tissue of the lesion under ultrasonic endoscopic observation However, when the amount of protrusion of the puncture needle becomes large, the tip of the puncture needle may be out of the ultrasonic scanning range, and may not be rendered as an ultrasonic image.
[0007]
The present invention has been made in view of the above circumstances, and provides an easy-to-use electronic scanning ultrasonic endoscope that can perform observation by an endoscope observation unit and observation by an ultrasonic observation unit in the best state. It is aimed at.
[0008]
[Means for Solving the Problems]
An electronic scanning ultrasonic endoscope according to the present invention is an endoscope observation apparatus in which an illumination optical system for illuminating the endoscope insertion axis direction and an observation optical system for direct viewing are provided on a distal end hard portion constituting a distal end portion of an insertion portion. Scanning type ultrasonic endoscope comprising a unit, and an ultrasonic observation unit in which a plurality of piezoelectric elements are arranged to form an ultrasonic scanning surface having an ultrasonic scanning range substantially lateral to the insertion axis direction. And
An observation unit moving means for changing a relative position between the endoscope observation unit and an ultrasonic scanning surface of the ultrasonic observation unit is provided.
[0009]
The observation unit moving unit is an advancing / retreating unit that moves at least one of the endoscope observation unit and the ultrasonic observation unit in the insertion axis direction.
[0010]
Alternatively, the observation unit moving unit is a rotation unit that rotates the ultrasonic observation unit with respect to the observation direction of the observation optical system.
[0011]
According to these configurations, the endoscope observation by the endoscope observation unit and the ultrasonic observation by the ultrasonic observation unit can be performed in the best state by appropriately moving the observation unit by the observation unit moving means.
[0012]
In the reciprocating movement means, observation is performed by moving the position of the observation optical system and the illumination optical system to a position not blocked by the ultrasonic observation unit, or moving the ultrasonic scanning surface to a position not blocked by the endoscope observation unit. .
[0013]
In addition, in the rotating means, by changing the ultrasonic observation unit, for example, in the vertical direction, the observation field of view of the observation optical system can be widened for endoscopic observation, and the ultrasonic scanning of the ultrasonic observation unit can be performed. Ultrasonic observation over a wide range can be performed by changing the range. In addition, ultrasonic observation can be performed while moving the ultrasonic scanning range so as to capture the tip of the puncture needle.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 11 relate to a first embodiment of the present invention. FIG. 1 is a view for explaining the configuration of an electronic scanning ultrasonic endoscope apparatus. FIG. 2 is a front end of an ultrasonic endoscope having advance / retreat moving means. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, FIG. 4 is a view illustrating an image guide in which a strand unraveled on a part of the middle part is illustrated, and FIG. FIG. 6 is a diagram illustrating a configuration in which a plurality of signal lines are pulled out of the guide tube to prevent disconnection of the signal lines, FIG. 6 is a diagram illustrating a protruding state of an endoscope observation unit, and FIG. FIG. 8 is a view for explaining a protruding state, FIG. 8 is a view for explaining a reciprocating moving means of another configuration of the electronic scanning ultrasonic endoscope, and FIG. 9 is a reciprocating moving means of another configuration of the electronic scanning ultrasonic endoscope. FIG. 10 is a view for explaining an advance / retreat moving means of another configuration of the electronic scanning ultrasonic endoscope, and FIG. Is a diagram illustrating a forward and backward movement means of yet another configuration of the scanning ultrasonic endoscope.
FIG. 11A is a diagram illustrating an endoscope observation state, and FIG. 11B is a diagram illustrating an ultrasonic observation state.
[0015]
As shown in FIG. 1, an electronic scanning ultrasonic endoscope apparatus (hereinafter, abbreviated as an ultrasonic endoscope apparatus) 1 of the present embodiment is an electronic scanning ultrasonic endoscope (hereinafter, referred to as an endoscope). An endoscope comprising a light source unit (not shown) 2 for supplying illumination light, and a signal processing unit for generating an endoscope image by driving an image sensor (not shown) and performing various signal processing of a received signal. An observation apparatus 3; an ultrasonic observation apparatus 4 including a signal processing unit that generates an ultrasonic diagnostic image by performing various kinds of signal processing of driving and reception signals of a piezoelectric element described below; and the ultrasonic observation apparatus 4 and the inside thereof. It mainly comprises a monitor 5 for displaying a diagnostic image generated by the endoscope observation device 3.
[0016]
The endoscope 2 includes an elongated insertion section 11 inserted into a body cavity, an operation section 12 located on the proximal end side of the insertion section 11, and a universal cord 13 extending from a side of the operation section 12. It is mainly composed of
[0017]
An endoscope connector 14 connected to a light source of the endoscope observation device 3 is provided at a base end of the universal cord 13. An ultrasonic cable 15 having an ultrasonic connector 15a electrically connected to the ultrasonic observation device 4 extends from the endoscope connector 14, and a signal processing unit of the endoscope observation device 3 is connected to an electric cable. An electric connector 14a to which an electric cord (not shown) to be connected is detachably connected is provided.
[0018]
The insertion portion 11 is a distal end rigid portion 6 formed of a hard member in order from the distal end side, a bendable bendable portion 7 located on the proximal end side of the distal end rigid portion 6, and located on the proximal end side of the curved portion 7. In addition, a flexible tube portion 8 having a small diameter, a long length, and flexibility reaching the distal end side of the operation portion 12 is continuously provided.
[0019]
The rigid end portion 6 includes an endoscope observation unit 20 configured to freely advance and retreat an observation optical system and an illumination optical system for performing endoscope observation by direct vision, and a plurality of piezoelectric elements that transmit and receive ultrasonic waves. A retractable ultrasonic observation unit 30 having the configured ultrasonic scanning surface is provided.
[0020]
The operation unit 12 includes an angle knob 16 for controlling the bending of the bending unit 7 in a desired direction, an air / water supply button 17a for performing an air supply / water supply operation, a suction button 17b for performing a suction operation, and the like. In addition to the treatment instrument insertion port 18 serving as an entrance of the treatment instrument to be introduced into the body cavity, the endoscope observation section operation knob 19a for moving the endoscope observation section 20 forward and backward and the ultrasonic observation section 30 are moved forward and backward. An ultrasonic observation unit operation knob 19b to be moved is provided. Reference numeral 9 denotes a mouthpiece arranged in a patient's mouth.
[0021]
As shown in FIGS. 2 and 3, the distal end member 6a constituting the distal end rigid portion 6 is provided with a convex portion 6b, and an endoscope observation for directly observing the stepped through hole 6c of the convex portion 6b. The portion 20 is slidably provided, and the ultrasonic observation portion 30 which projects from the distal end member 6a and has an ultrasonic scanning range substantially on the side (the upper side in the drawing) with respect to the insertion axis direction is slid. It is provided freely. In this configuration, part of the optical field of view of the endoscope observation unit 20 is blocked by the ultrasonic observation unit 30, and part of the ultrasonic scan range of the ultrasonic observation unit 30 is controlled by the projection 6b. Blocked.
[0022]
The endoscope observation unit 20 includes an endoscope main body member (hereinafter, abbreviated as an endoscope main body) slidable with respect to the distal end member 6a in which the observation optical system 21 and the illumination optical system 22 are disposed. 23), a watertight member 24 formed of a tube body provided with a stretchable and bellows-like portion for watertightness between the sliding endoscope main body 23 and the distal end member 6a, and the endoscope. It mainly comprises an endoscope main body operation tube 25 which is an advancing / retreating means for pushing and pulling the main body 23.
[0023]
The endoscope main body 23 includes a sliding portion 23a having a substantially elliptical cross-section to prevent rotation, and a pipe-shaped portion 23b having a substantially circular cross-section. The end of the endoscope main body operation tube 25 is fixed to the pipe-shaped portion 23b.
The distal end of the watertight member 24 is integrally fixed to the proximal end surface of the sliding portion 23a of the endoscope main body 23, and the proximal end is integrally fixed to the distal end member 6a.
[0024]
The endoscope main body operation tube 25 is formed of a resin tube or a resin tube in which a braid is braided, and a base end portion thereof is connected and fixed to the endoscope observation section operation knob 19a. I have. An image guide fiber 26 constituting the observation optical system and a light guide fiber (not shown) constituting the illumination optical system pass through the endoscope main body operation tube 25. The endoscope main body operation tube 25 is inserted through an endoscope guide tube 27 that is inserted through the insertion section 11.
[0025]
On the other hand, the ultrasonic observation section 30 is provided with an ultrasonic scanning surface 32 provided by arranging a plurality of piezoelectric elements 31,..., 31 slidably transmitting and receiving ultrasonic waves to and from the distal end member 6a. A watertight body composed of a sound wave main body member (hereinafter abbreviated as an ultrasonic part main body) 33 and a tube body provided with a stretchable and bellows-like part for watertightness between the ultrasonic part main body 33 and the tip member 6a. It is mainly composed of a member 34 and an ultrasonic main body operation tube 35 which is an advancing / retreating means for pushing and pulling the ultrasonic main body 33.
[0026]
The ultrasonic unit main body 33 has a sliding portion 33b provided with a flat portion 33a serving as a detent, and the ultrasonic main body 33 is provided at the base end of the sliding portion 33b, that is, at the base end of the ultrasonic unit main body 33. The distal end of the operation tube 35 is fixed. The base end of the ultrasonic main body operation tube 35 is connected and fixed to an ultrasonic observation unit operation knob 19b provided on the operation unit 12. A signal line 36 extending from the piezoelectric element 31 is inserted into the ultrasonic main body operation tube 35.
[0027]
The ultrasonic main body operation tube 35 is a resin tube in which a resin tube or a braid is braided like the endoscope main body operation tube 25. Further, the ultrasonic main body operation tube 35 is inserted through an ultrasonic guide tube 37 inserted and arranged in the insertion portion 11. Further, the distal end of the watertight member 34 is integrally fixed to a predetermined surface of the ultrasonic unit main body 33, and the base end is integrally fixed to a predetermined surface of the distal member 6a. Further, reference numeral 7a in FIG. 2 denotes a curved piece, reference numeral 7b denotes an outer tube, reference numeral 6d denotes a through hole for an ultrasonic main body having a plane corresponding to the flat portion 33a, and reference numeral 6e denotes a hole from the treatment tool insertion port 18. This is a treatment tool channel through which the inserted treatment tool is inserted.
[0028]
As shown in FIG. 4, the base end of the endoscope guide tube 27 is fixed to a guide tube fixing member 41 provided in the operation section 12. The base end of the endoscope main body operation tube 25 is fixed to a slide member 42 integrated with the endoscope observation section operation knob 19a in the vicinity of the guide tube fixing member 41.
[0029]
Then, a part of the covering member is peeled off in the middle of the image guide fiber 26 and the light guide fiber (not shown), which are inserted into the endoscope main body operation tube 25 and guided on the slide member 42. A wire slack portion 26a is provided in which the wire is loosened and loosened. Thus, the endoscope observation unit 20 moves forward and backward without cutting the ride guide strand.
[0030]
When the observation optical system is configured by providing a solid-state imaging device, a slack portion is provided on a signal line extending from the solid-state imaging device, and the slack portion is disposed on, for example, the slide member 42.
[0031]
On the other hand, as shown in FIG. 5, a filling material 51 such as a resin member is provided at the base end of the ultrasonic main body operation tube 35 connected and fixed to the ultrasonic observation section operation knob 19b for the purpose of improving the push-pull operation. Is enclosed. In addition, a plurality of slits 35a and 37a are formed in, for example, a staggered arrangement on the side surface of the ultrasonic main body operation tube 35 and the side surface of the guide tube 37. From these slits 35a and 37a, a plurality of signal lines 36 extending from the piezoelectric element 31 are drawn out in a state of being slackened to the outer peripheral side of the guide tube 37 by a plurality of lines. The slit 35a and the slit 37a are formed at substantially the same position, and the slit 37a is formed to be narrower than the slit 35a.
[0032]
The operation of the ultrasonic endoscope apparatus 1 configured as described above will be described.
When performing the endoscope observation, the operation knob 19a for the endoscope observation unit provided on the operation unit 12 is manually operated in a predetermined direction. Then, the slide member 42 and the endoscope main body operation tube 25 are moved forward with the turning operation of the endoscope observation section operation knob 19a. As a result, the endoscope main body 23 constituting the endoscope observation unit 20 moves forward and protrudes as shown by the arrow in FIG. At the time of this protruding operation, the image guide fiber 26 and the light guide fiber are slack on the slide member 42, so that the endoscope is not loaded on the image guide fiber 26 and the light guide fiber. The unit body 23 moves smoothly in the insertion axis direction.
[0033]
When the endoscope main body 23 projects to a predetermined position, a favorable endoscope observation state is achieved without the optical field of view of the observation optical system 21 being interrupted by the ultrasonic observation unit 30.
[0034]
On the other hand, when performing ultrasonic observation, the operation knob 19b for the ultrasonic observation unit provided on the operation unit 12 is manually operated in a predetermined direction. Then, the ultrasonic main body operation tube 35 moves forward with the rotation of the ultrasonic observation section operation knob 19b. Then, as indicated by the arrow in FIG. 7, the ultrasonic unit main body 33 constituting the ultrasonic observation unit 30 moves forward and enters a protruding state. Thereby, satisfactory ultrasonic observation can be performed without the ultrasonic scanning range of the ultrasonic scanning surface 32 provided in the ultrasonic observation unit 30 being interrupted by the endoscope observation unit 20 and the projection 6b.
[0035]
Since the signal line 36 is pulled out from the slits 35a and 37a and is in a slack state, the ultrasonic unit main body 33 smoothly moves in the insertion axis direction with no load applied to the signal line 36. I do.
[0036]
As described above, the endoscope observation unit for performing the direct-view observation is slidably provided on the rigid distal end portion, and the ultrasonic observation unit having the ultrasonic scanning surface configured by arranging a plurality of piezoelectric elements is slidably provided. By providing the operation knob for the endoscope observation unit and the operation knob for the ultrasonic observation unit in the operation unit, the endoscope can be operated by operating the operation knob for the endoscope observation unit or the operation knob for the ultrasonic observation unit as appropriate. By moving the mirror observation unit or the ultrasonic observation unit back and forth to change the position in the direction of the insertion axis, the best optical field range or the ultrasonic scanning range is secured to perform good endoscope observation and ultrasonic observation. be able to.
[0037]
Also, a configuration in which a loose wire section is provided in the middle of the light guide fiber and the image guide fiber extending from the endoscope observation section, or a configuration in which the signal line extending from the image sensor is loosened, and By pulling out the output signal line from the slit of the ultrasonic main body operation tube and the slit of the guide tube to make it slack, the fiber when the endoscope observation unit and ultrasonic observation unit are moved forward and backward in the axial direction It is possible to reliably prevent the kind and signal lines from being disconnected.
[0038]
In the present embodiment, the endoscope observation unit 20 and the ultrasonic observation unit 30 are configured to be able to advance and retreat in the axial direction of the insertion unit. However, as shown in FIG. A configuration in which only the endoscope observation unit 20 </ b> A is moved forward and backward while being fixed in a state of protruding from the surface by a predetermined amount may be adopted. In this configuration, the ultrasonic scanning range of the ultrasonic operation surface 32 provided in the ultrasonic observation unit 30A is secured by setting the sliding portion 23a in the stepped through-hole 6c, and By setting the endoscope observation unit 20 </ b> A in a protruding state, the optical viewing range is not interrupted by the ultrasonic observation unit 30. Thus, by appropriately protruding and retracting the endoscope observation unit 20A, a desired observation can be performed while securing an optical field range or an ultrasonic scanning range.
[0039]
In this embodiment, the sliding portion 23a is prevented from rotating by providing a flat portion for stopping rotation in the pipe-shaped portion 23a of the endoscope main body 23.
[0040]
In addition, as shown in FIG. 9, the endoscope observation unit 20B is fixed to a protruding portion formed longer so as to form a step 6f on which the ultrasonic observation unit 30B is disposed, and only the ultrasonic observation unit 30B is connected. It may be configured to move forward and backward. According to this configuration, the ultrasonic scanning range of the ultrasonic operation surface 32 is secured by projecting the ultrasonic observation unit 30B, and the observation optical system 21 is arranged by pulling the ultrasonic observation unit 30B back into the step 6f. Is ensured. Thus, the ultrasonic observation unit 30B can be appropriately protruded and retracted, and the desired observation can be performed while securing the optical field of view or the ultrasonic scanning range.
[0041]
Furthermore, in the above-described embodiment, a configuration in which the endoscope observation unit and the ultrasonic observation unit are advanced and retracted by operating the endoscope observation unit operation knob and the ultrasonic observation unit operation knob provided in the operation unit at hand. However, as shown in FIG. 10, a fluid tube 61 and a cylinder portion 62 for injecting and discharging a fluid such as air, for example, and an ultrasonic portion main body 33A serving as a piston portion 63 are provided to constitute an advance / retreat moving means. You may make it.
[0042]
In addition, in the present embodiment, in order to prevent the signal lines 36 extending from the piezoelectric element 31 from being disconnected when the ultrasonic unit main body 33A moves forward and backward, a cylindrical member constituting the cylinder unit 62 is provided. The internal space 64 is a signal line arrangement space, and the signal lines 36 are loosely loosened and accommodated in a spiral shape in this space. Then, the collectively configured distal end portion of the signal lines 36 is fixed to the cylindrical member 64 and extends toward the operation unit. Instead of using the loosened signal lines 36, a configuration using a spirally formed flexible substrate may be used.
[0043]
As a result, by injecting a fluid into the cylinder 62, the ultrasonic unit main body 33A moves forward so as to protrude, and by discharging the fluid in the cylinder 62, the ultrasonic unit main unit 33A moves toward the proximal end. Go back to go. That is, by appropriately injecting or discharging a fluid, the ultrasonic unit main body 33A is moved forward and backward to secure an optical field of view or an ultrasonic scanning range, and a desired observation can be performed.
[0044]
Further, the endoscope observation unit and the ultrasonic observation unit are moved forward and backward by operating knobs provided on the operation unit and by injecting / discharging a fluid, instead of being inserted into the distal end member 6a as shown in FIG. A main body storage space 70 for storing the ultrasonic unit main body 33B is formed, a rack 71 is provided in the ultrasonic unit main body 33B disposed in the main body storage space 70, and a gear meshing with the rack 71 at a predetermined position of the distal end member 6a. 72 is provided with a rack and pinion portion, and a meshing portion 74a that meshes with the gear 72 of the rack and pinion portion is provided at a predetermined position on the outer peripheral surface of a sheath member 74 that is inserted into the treatment instrument channel 73, so that the advance / retreat moving means is provided. It may be configured.
[0045]
By moving the distal end of the sheath member 74 so as to protrude from the treatment instrument opening as shown in FIG. 11B, the meshing portion 74a provided on the sheath member 74 is moved to the gear 72. To rotate. Then, with the rotation of the gear 72, the rack 72 moves forward, and the ultrasonic observation unit 30C projects from the endoscope distal end surface. On the other hand, in this state, when the sheath member 74 is pulled back so as to be accommodated in the treatment instrument channel 73, the rack 72 moves to the proximal end side and the ultrasonic observation unit 30C is stored in the main body storage space 70. Is done.
[0046]
In this way, by appropriately moving the sheath member 74 provided with the meshing portion 74a meshing with the gear 72 constituting the rack and pinion portion, the ultrasonic main body portion 33B is moved forward and backward to move the optical field range or the Desired observation can be performed while securing the sound wave scanning range.
[0047]
In the present embodiment, a slip mechanism is provided between the rack 71 and the gear 72 constituting the rack and pinion portion. This slip mechanism is constituted by, for example, a slip gear 75 that is supported by a shaft portion 75a with a predetermined elastic force. When the ultrasonic observation unit 30C comes into contact with, for example, a body wall or a mucous membrane in a body cavity and the movement resistance of the rack 71 increases from a predetermined state, the slip gear 75 projects the sheath member 74 and Even when trying to move the sound wave observation unit 30 </ b> C, it acts to prevent the rotation of the gear 72 from being transmitted to the rack 72.
[0048]
Thus, when the ultrasonic observation unit 30C is in contact with a body wall, a mucous membrane, or the like, the occurrence of a problem that the ultrasonic observation unit 30C further projects and damages the body wall or the like is reliably prevented. .
[0049]
12 to 14 relate to a second embodiment of the present invention. FIG. 12 is a view for explaining the configuration of a rigid distal end portion of an ultrasonic endoscope having a rotating means, and FIG. 13 is an operation of the ultrasonic endoscope. FIG. 14 is a diagram for explaining a method of rotating the ultrasonic observation unit and correcting the puncture line.
[0050]
12A is a longitudinal sectional view, FIG. 12B is a sectional view taken along line BB of FIG. 12A, and FIG. 14A is an ultrasonic observation unit displayed on a screen. FIG. 14B is a diagram showing an ultrasonic observation unit displayed on a screen.
[0051]
In the electronic scanning ultrasonic endoscope of the present embodiment, instead of moving at least one of the endoscope observation unit or the ultrasonic observation unit in the insertion axis direction as shown in the first embodiment, As shown in FIGS. 12 (a) and 13, the ultrasonic observation unit 30D is rotated as shown by arrows A and B to change the upper ultrasonic scanning range to the upper front.
[0052]
Therefore, the second gear 77 is provided at a predetermined position of the ultrasonic unit main body 33B constituting the ultrasonic observation unit 30D instead of the rack constituting the rack and pinion unit shown in FIGS. 11 (a) and 11 (b). Are integrally provided to rotate the ultrasonic unit main body 33B. The ultrasonic observation unit 30D has a configuration protruding from the distal end surface, and the other configuration is the same as the configuration shown in FIGS. 11A and 11B, and the same members are denoted by the same reference numerals. The description is omitted.
[0053]
By configuring the ultrasonic endoscope 2A as described above, the distal end of the sheath member 74 is moved so as to project from the treatment instrument opening as shown in FIG. The engaged portion 74a rotates the gear 72, and the rotation of the gear 72 is transmitted to the second gear 77 via the slip gear 75.
[0054]
Then, the ultrasonic observation unit 30 rotates from the state shown by the dashed line to the state shown by the solid line, and the ultrasonic scanning range also changes from the upper direction shown by the dashed line to the upper front direction shown by the solid line. Further, the optical field of view of the observation optical system also extends from the range shown by the two-dot chain line to the range shown by the solid line. With this, for example, when the puncture needle 78 is projected from the sheath member 74 as shown by a broken line, the tissue of the lesion site is securely placed with the distal end portion 78a of the puncture needle 78 within the ultrasonic operation range. Can be collected.
[0055]
On the other hand, in this state, by pulling back the sheath member 74 so as to be accommodated in the treatment instrument channel 73, the second gear 77 rotates in the reverse direction, and the ultrasonic scanning range of the ultrasonic observation unit 30D and the observation are performed. The optical field of view of the optical system returns from the state shown by a straight line to the original state shown by the one-dot chain line and the two-dot chain line.
[0056]
As described above, by appropriately moving the sheath member 74 provided with the meshing portion 74a engaged with the gear 72, the ultrasonic body main body provided with the second gear 77 is rotated, and the optical system of the observation optical system is rotated. It is possible to perform wide-angle direct-view observation based on the visual field range, and observation while changing the ultrasonic scanning range from the upper side to the upper front side.
[0057]
By the way, in the second embodiment, when the ultrasonic observation unit 30D rotates, the ultrasonic scanning range of the ultrasonic observation unit 30D needs to change the puncture line according to a change from the upper side to the upper front side. There is.
[0058]
Therefore, for example, a strain gauge or the like is provided as the rotation angle detecting means indicated by the reference numeral 79, and based on a change in the resistance value of the strain gauge, an illustration provided in the endoscope observation device 3 or the ultrasonic observation device 4 is used. The rotation amount is calculated by an arithmetic processing unit that does not perform the correction, and the puncture line is corrected based on the calculated rotation amount, or displayed on the screen 5a of the monitor 5 as shown in FIGS. The rotation amount is calculated by the image processing unit and the arithmetic processing unit provided in the endoscope observation device 3 based on the appearance of the upper surface of the ultrasonic observation unit 30 </ b> D, and based on the calculated rotation amount. To correct the puncture line.
[0059]
It should be noted that the present invention is not limited to only the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.
[0060]
[Appendix]
According to the above-described embodiment of the present invention as described in detail above, the following configuration can be obtained.
[0061]
(1) An endoscope observation unit having an illumination optical system for illuminating the endoscope insertion axis direction and an observation optical system for direct viewing, and a plurality of piezoelectric elements are arranged on a hard distal end portion constituting the distal end of the insertion unit. In an electronic scanning ultrasonic endoscope comprising an ultrasonic observation unit formed with an ultrasonic scanning surface having an ultrasonic scanning range substantially laterally with respect to the insertion axis direction,
An electronic scanning ultrasonic endoscope provided with an observation unit moving unit that changes a relative position between the endoscope observation unit and an ultrasonic scanning surface of the ultrasonic observation unit.
[0062]
(2) The electronic scanning ultrasonic endoscope according to Appendix 1, wherein the observation unit moving unit is an advancing / retracting moving unit that moves at least one of the endoscope observation unit or the ultrasonic observation unit in the insertion axis direction. mirror.
[0063]
(3) the endoscope observation unit or the ultrasonic observation unit,
A body member on which the observation optical system and the illumination optical system or the ultrasonic scanning surface are slidably arranged with respect to the distal end hard portion,
A telescopic water-tight member for achieving water-tightness between the main body member and the distal end hard portion,
The electronic scanning ultrasonic endoscope according to supplementary note 1, comprising:
[0064]
(4) The electronic scanning ultrasonic endoscope according to Supplementary Note 2 or 3, wherein the advance / retreat moving means is an operation tube having a distal end fixed to a base end of the main body member and performing a push / pull operation.
[0065]
(5) The electronic scanning ultrasonic endoscope according to Supplementary Note 2 or 3, wherein the advance / retreat moving means is a fluid tube that supplies or sucks a fluid that advances or retreats the main body member serving as a piston disposed in a cylinder. .
[0066]
(6) The electronic scanning ultrasonic endoscope according to appendix 4 or appendix 5, wherein a signal line extending from the piezoelectric element of the ultrasonic observation unit is inserted into the operation tube.
[0067]
(7) A signal line or an image guide fiber extending from an imaging device constituting an observation optical system of the endoscope observation unit and a light guide fiber constituting an illumination optical system are inserted into the operation tube. The electronic scanning ultrasonic endoscope according to supplementary note 5.
[0068]
(8) The electronic scanning type supercharger according to Supplementary Note 6 or 7, wherein the operation tube is provided with a disconnection preventing means for preventing the signal line or the guide fiber passing through the tube from being disconnected. Sonic endoscope.
[0069]
(9) The electronic scanning ultrasonic endoscope according to Supplementary Note 8, wherein the disconnection prevention means is a through-hole arranged in a middle portion of the tube for guiding the signal line or the guide fiber to the outer peripheral side.
[0070]
(10) The electronic scanning ultrasonic endoscope according to supplementary note 8, wherein the disconnection prevention means is a loosened portion where the signal line or the light guide fiber is loosened.
[0071]
(11) The electronic scanning ultrasonic endoscope according to supplementary note 3, wherein the watertight member is a tube formed of a stretchable elastic member.
[0072]
(12) The electronic scanning ultrasonic endoscope according to attachment 3, wherein the watertight member is a tube having a bellows-like portion.
[0073]
(13) A treatment tool in which the advance / retreat means is provided on the outer peripheral surface with a rack and pinion portion provided on the base end side of a main body member constituting the ultrasonic observation section, and a meshing portion meshing with a gear of the rack and pinion portion. 4. The electronic scanning ultrasonic endoscope according to claim 2 or 3, wherein
[0074]
(14) The electronic scanning ultrasonic endoscope according to appendix 13, wherein the treatment tool is a sheath member, and the meshing portion is provided on an outer peripheral surface of a distal end portion of the sheath member.
[0075]
(15) The electronic scanning ultrasonic endoscope according to Appendix 1, wherein the observation unit moving unit is a rotation unit configured to rotate the ultrasonic observation unit with respect to an observation direction of the observation optical system.
[0076]
(16) The rotating means includes a second gear unit integrally provided on a base end side of a main body member constituting the ultrasonic observation unit, a gear meshing with the gear, and a meshing unit meshing with the gear. The electronic scanning ultrasonic endoscope according to supplementary note 15, which is a treatment tool provided on the surface.
[0077]
(17) The electronic scanning ultrasonic endoscope according to supplementary note 16, wherein a main body member constituting the ultrasonic observation unit is rotated in accordance with a change in a projection amount of the treatment tool.
[0078]
(18) The electronic scanning ultrasonic endoscope according to supplementary note 16, wherein a slip mechanism is provided between the gears.
[0079]
(19) The electronic scanning ultrasonic endoscope according to supplementary note 16, wherein a rotation angle detecting unit is provided in the ultrasonic observation unit.
[0080]
(20) The electronic scanning ultrasonic endoscope according to supplementary note 19, wherein the rotation angle detecting means is a strain gauge.
[0081]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an easy-to-use electronic scanning ultrasonic endoscope capable of performing observation by the endoscope observation unit and observation by the ultrasonic observation unit in the best state. .
[Brief description of the drawings]
FIG. 1 to FIG. 11 relate to a first embodiment of the present invention, and FIG. 1 is a diagram illustrating a configuration of an electronic scanning ultrasonic endoscope apparatus.
FIG. 2 is a diagram illustrating a configuration of a distal end rigid portion of an ultrasonic endoscope having an advance / retreat moving unit.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a view for explaining an image guide in which an element wire in a state of being unraveled on a part of a halfway part is illustrated.
FIG. 5 is a diagram illustrating a configuration in which a plurality of signal lines are drawn out of a guide tube to prevent disconnection of the signal lines.
FIG. 6 is a diagram illustrating a protruding state of an endoscope observation unit.
FIG. 7 is a view for explaining a protruding state of an ultrasonic observation unit.
FIG. 8 is a view for explaining an advance / retreat moving means of another configuration of the electronic scanning ultrasonic endoscope.
FIG. 9 is a view for explaining an advance / retreat moving means of another configuration of the electronic scanning ultrasonic endoscope.
FIG. 10 is a view for explaining an advance / retreat moving means of another configuration of the electronic scanning ultrasonic endoscope.
FIG. 11 is a view for explaining a forward / backward moving means of another configuration of the electronic scanning ultrasonic endoscope.
FIG. 12 to FIG. 14 are views according to a second embodiment of the present invention, and FIG. 12 is a diagram illustrating a configuration of a distal end rigid portion of an ultrasonic endoscope having a rotating unit.
FIG. 13 is a diagram illustrating the operation of an ultrasonic endoscope.
FIG. 14 is a diagram illustrating a method of rotating the ultrasonic observation unit and correcting a puncture line.
[Explanation of symbols]

Claims (3)

挿入部の先端部を構成する先端硬質部に、内視鏡挿入軸方向を照らす照明光学系及び直視する観察光学系を設けた内視鏡観察部と、複数の圧電素子を配列して挿入軸方向に対して略側方を超音波走査範囲とする超音波走査面を形成した超音波観察部とを具備する電子走査式超音波内視鏡において、
前記内視鏡観察部と、前記超音波観察部の超音波走査面との相対位置を変化させる観察部移動手段を設けたことを特徴とする電子走査式超音波内視鏡。
An endoscope observation unit provided with an illumination optical system for illuminating the endoscope insertion axis direction and an observation optical system for direct viewing, and an insertion shaft in which a plurality of piezoelectric elements are arranged on a hard distal end constituting the distal end of the insertion unit An electronic scanning ultrasonic endoscope including an ultrasonic observation unit formed with an ultrasonic scanning surface having an ultrasonic scanning range substantially on the side with respect to the direction,
An electronic scanning ultrasonic endoscope comprising: an observation unit moving unit that changes a relative position between the endoscope observation unit and an ultrasonic scanning surface of the ultrasonic observation unit.
前記観察部移動手段は、前記内視鏡観察部又は前記超音波観察部の少なくとも一方を、挿入軸方向に移動させる進退移動手段であることを特徴とする請求項1に記載の電子走査式超音波内視鏡。2. The electronic scanning type ultra-small electronic scanning device according to claim 1, wherein the observation unit moving unit is a reciprocating unit that moves at least one of the endoscope observation unit or the ultrasonic observation unit in an insertion axis direction. 3. Sonic endoscope. 前記観察部移動手段は、前記超音波観察部を前記観察光学系の観察方向に対して回動させる回動手段であることを特徴とする請求項1に記載の電子走査式超音波内視鏡。2. The electronic scanning ultrasonic endoscope according to claim 1, wherein the observation unit moving unit is a rotation unit that rotates the ultrasonic observation unit with respect to an observation direction of the observation optical system. 3. .
JP2002176075A 2002-06-17 2002-06-17 Electronic scanning ultrasound endoscope Expired - Fee Related JP4153731B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002176075A JP4153731B2 (en) 2002-06-17 2002-06-17 Electronic scanning ultrasound endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002176075A JP4153731B2 (en) 2002-06-17 2002-06-17 Electronic scanning ultrasound endoscope

Publications (2)

Publication Number Publication Date
JP2004016505A true JP2004016505A (en) 2004-01-22
JP4153731B2 JP4153731B2 (en) 2008-09-24

Family

ID=31174542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002176075A Expired - Fee Related JP4153731B2 (en) 2002-06-17 2002-06-17 Electronic scanning ultrasound endoscope

Country Status (1)

Country Link
JP (1) JP4153731B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006304905A (en) * 2005-04-27 2006-11-09 Pentax Corp Ultrasound endoscope tip
JP2007125277A (en) * 2005-11-07 2007-05-24 Pentax Corp Electronic endoscope device
JP2007209450A (en) * 2006-02-08 2007-08-23 Pentax Corp Magnifying endoscope
JP2012170768A (en) * 2011-02-24 2012-09-10 Fujifilm Corp Photoacoustic imaging apparatus, and method for detecting failure of the same
JP2012210337A (en) * 2011-03-31 2012-11-01 Fujifilm Corp Photoacoustic imaging apparatus and method for detecting failure in the same
CN112957075A (en) * 2021-03-23 2021-06-15 苏州希声科技有限公司 Sliding ring type ultrasonic endoscope probe and imaging method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006304905A (en) * 2005-04-27 2006-11-09 Pentax Corp Ultrasound endoscope tip
JP2007125277A (en) * 2005-11-07 2007-05-24 Pentax Corp Electronic endoscope device
JP2007209450A (en) * 2006-02-08 2007-08-23 Pentax Corp Magnifying endoscope
JP2012170768A (en) * 2011-02-24 2012-09-10 Fujifilm Corp Photoacoustic imaging apparatus, and method for detecting failure of the same
JP2012210337A (en) * 2011-03-31 2012-11-01 Fujifilm Corp Photoacoustic imaging apparatus and method for detecting failure in the same
CN112957075A (en) * 2021-03-23 2021-06-15 苏州希声科技有限公司 Sliding ring type ultrasonic endoscope probe and imaging method

Also Published As

Publication number Publication date
JP4153731B2 (en) 2008-09-24

Similar Documents

Publication Publication Date Title
JP3221824B2 (en) Endoscope with bending section protection mechanism
JP5030514B2 (en) Endoscope and endoscope system
US20080033245A1 (en) Rotating self-traveling endoscope system, rotating self-traveling endoscope insertion assisting tool, and method for technique of inserting endoscope insertion portion into small intestine using rotating self-traveling endoscope
JPH11276422A (en) Ultrasonic endoscope
WO2006129440A1 (en) Endoscope device
JP4624714B2 (en) Endoscope
JP4373262B2 (en) Endoscope insertion assist device
JP5484699B2 (en) Endoscope insertion aid and endoscope apparatus
JPH11276489A (en) Ultrasonic endoscope
JP4153731B2 (en) Electronic scanning ultrasound endoscope
JP3327950B2 (en) Ultrasound endoscope
WO2006109399A1 (en) Endoscope insertion part and endoscope system
JP4533907B2 (en) Operation knob attachment
JP2004154177A (en) Endoscope
JP3990157B2 (en) Endoscope
JP2000126122A (en) Intracoelom diagnostic instrument
JP5006591B2 (en) Ultrasound endoscope
JP5390150B2 (en) Auxiliary tool and endoscope system
JP2009028109A (en) Ultrasound endoscope
JP7097860B2 (en) Endoscope
JP4365865B2 (en) Insertion device
JP3462597B2 (en) Ultrasound endoscope tip
KR20210126590A (en) Endoscopic device and method of use thereof
JP3068691B2 (en) Endoscope tip
JP4472497B2 (en) Endoscope

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050607

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20071005

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20071016

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20071217

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080701

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080704

R151 Written notification of patent or utility model registration

Ref document number: 4153731

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110711

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120711

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130711

Year of fee payment: 5

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees