JPH02271851A - 超音波共振振動器 - Google Patents

超音波共振振動器

Info

Publication number
JPH02271851A
JPH02271851A JP1330969A JP33096989A JPH02271851A JP H02271851 A JPH02271851 A JP H02271851A JP 1330969 A JP1330969 A JP 1330969A JP 33096989 A JP33096989 A JP 33096989A JP H02271851 A JPH02271851 A JP H02271851A
Authority
JP
Japan
Prior art keywords
strip
vibrator
tunnel
transducer
proximal end
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
JP1330969A
Other languages
English (en)
Other versions
JPH0560754B2 (ja
Inventor
Alan Broadwin
アラン・ブロードウイン
Claus Kleesattel
クラウス・クレーサツテル
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.)
Valleylab Inc
Original Assignee
Valleylab Inc
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Filing date
Publication date
Application filed by Valleylab Inc filed Critical Valleylab Inc
Publication of JPH02271851A publication Critical patent/JPH02271851A/ja
Publication of JPH0560754B2 publication Critical patent/JPH0560754B2/ja
Granted legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
    • A61B17/22012—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2217/00—General characteristics of surgical instruments
    • A61B2217/002—Auxiliary appliance
    • A61B2217/005—Auxiliary appliance with suction drainage system

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Vascular Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 ジューサを含む超音波共振振動器に係る。
外科的用途、特に組織分断用ツールを含む外科用ハンド
ピースに使用する超音波共振振盪様内蔵装置は周知であ
る。このような装置においては所要の超音波振動を磁気
歪手段で発生し、連結部材を介して当該ツールに伝達す
る。
この形式の装置の代表例が米国特許筒 ４２２３．６７６号に開示されており、その開示内容を
ンスジューサとして米国特許筒ＲＥ　２５，０３３号に
教示されているようなニッケル合金片を成層して成る磁
気歪成層体を使用している。この成層体は磁気歪材料と
してのニッケル合金の帯条片を複数枚重ねて成層構造に
したものから成る。成層は渦電流からのエネルギー損失
と言った有害作用を低減するために必要である。
最近の改良形では、成層体の輪郭を浅く湾曲させて剛性
を増す工夫が成されている。
成層形トランスジューサが適正に機能するためには、 １、Ｉｆｌ械的に堅牢であること、 ２、音響損失を最小にすること、 ３、その動作環境から比較的容易に除去できることが望
ましい。
上述の従来形トランスジューサは外科的処置に使用する
と効果的かつ非常に便利であることが証明されているが
、その性能記録が良いこととは別にいくつかの問題点も
ある。例えば、何らかの理由で冷却剤の流量が低下した
時、平坦形成層構造では加熱するおそれがあり、またそ
の加熱によって装置に重大な損傷を及ぼす結果となる場
合がある。また、平坦構造が実質的な機械的剛性を示す
のは、−平面に限られており、全体的な剛性を欠く結果
として誤操作による機械的損傷を生じることがある。ま
た成層が分離したり曲げられたりすると、装置全体が使
用不能になるおそれがある。
上に挙げたような問題点は、本出願と同時に出願した米
国特許出願第２８７．７４８号に記載、特許請求してい
るように、帯条片を半径方向に伸びるフィン０形に配設
した実質的に剛性の柱状体としてトランスジューサを形
成することによって克服すトランスジューサは複数の磁
気歪材料帯条片を含んで成り、各帯条片が近位端部と遠
位端部を有し、この両端部において隣接帯条片に取付け
されて、中心軸を有しその中心軸に関して半径方向に伸
びるフィンを備えた実施的に剛性の柱状体を形成してい
る。
とも一部、特に超音波振動を外科用ツール等の動件部材
や流体移動用導管に伝達する連結部分を収容し得るのに
十分の大きさの直径の中央トンネルを設けることによっ
て、さらに改良された超音波共振振動器を獲得できると
いう知見を得た。また、前記連結部材はトランスジュー
サの外部に端々間で取付けしても、あるいは本明細書で
「折畳み形共振器−１と称する構造の中に後述するよう
に取付けしても、最終的に得られる装置の動作効率には
何ら影響しないという知見も得られた。
本発明によると、近位端部と遠位端部を有する一部とを
含んで成る超音波共振振動器であって、このトランスジ
ューサが磁気歪材料から成る複数の細長い帯条片を含ん
でおり、各帯条片が近位端部と遠位端部を有し、且つこ
の両端部において隣接帯条片に取付けされて一体的で実
質的に剛性の柱状体を形成しており、こうして形成され
た柱状体は中心軸を有し、該中心軸に関して半径方向に
伸びるフィンを備え、且つ前記中心軸に沿って同心的に
中央トンネルを形成する長手方向孔を有しており、前記
共振部材の少なくとも一部がトンネル内部に配設され且
つ前記近位端部においてトンネルの内側に取付番プされ
ている超音波共振振動器が提供される。
好適には、前記共振部材が近位端部と遠位端部を有する
連結部材を含んでおり、前記近位端部が共振部材の近位
端部に相当し、前記遠位端部が動作部材に連結されてい
るように構成される。
中央トンネルの横断面は、中心軸を中心とする対称形で
それと適合する断面の共振部材を収容できるように構成
されていれば任意の形状とすることができる。適当な断
面形状の例として円形と正方形がある。便宜性と実用性
から実質的に円形の横断面が好んで使用される。
好適には、トランスジューサの各細長い帯状片が実質的
に■字形断面であり“Ｖ”の字のそれぞれの辺が帯条片
の長手方向の長さによって形成される。
このような好適実施態様において、各帯条片をその両端
部において取付けする際、ろう付けまたは溶接によって
行うことができる。また、■字形帯条片のそれぞれの辺
をすぐ隣りの帯条片の辺とその長さ全体に亘って接触さ
けて半径方向に伸びるフィンを形成し、結果的に得られ
るフィンが結果的に得られる実質的に剛性の柱状体の長
手方向に伸びる前記中央トンネルの周りに放射状パター
ンを形成するようにするのが望ましい。
特に好適とされる実施態様は、共振部材が外科用ツール
としての動作部材に連結される連結部分または連結部分
との組合せから成る振動器である。
この実施態様では、これらの部材で外科用ハンドピース
の一部を形成する。こうして形成されるハンドピースは
折畳み形共振器を用いたことによって従来のハンドピー
スより短くなり、その結果従来のハンドヒースより邪魔
にならず扱い易いものとなる。
別の実施態様として、動作部材と連結部分を組合せる代
わりに共振ツールを用いて外科用ハンドピースを構成し
ても良い。
好適には、共振器にその長手方向に伸びる中心孔を設け
、その直径を流体運搬用の管を収容できるに十分な程度
にする。
本発明の１ｔ！動器に使用するトランスジュー量すは、
従来の成層形トランスジューサと対照的に、好適には略
円形横断面の実質的に剛性の柱状体の形をとり、これに
柱状体の中心軸と同心的に長平方向に延びる中央トンネ
ルと前記中心軸に対して半径方向に延びるフィンとを備
える。前記フィンはニッケル合金を適当な酸化物で被覆
したもののような磁気歪材料から成る細長い帯条片を近
位端部と遠位端部において好適にはろう付けまたは溶接
によって相互に取付けして形成される。
好適実施態様においては、各細長の帯条片を実質的に■
字形の横断面とし、Ｉｆ　Ｖ　ＩＨの字のそれぞれの辺
がすぐ隣りの帯条片の辺と長さ全体に亘って接触するよ
うに帯条片を整列させることによって柱状体が形成され
、つなぎ合わされた帯条片が柱状体の長手方向に伸びる
前記中央トンネルの周りに放射状パターンを形成してい
る。結果的に得られる構造体は実質的に剛性の柱状体で
あり、従来の成層構造より堅固な上、このようなフィン
を配設することで複数の自由面が生まれて放熱を容易に
しており、それによって正規の冷却手段が故障した場合
でも過熱の生じる可能性が低くなっている。
縦長の帯条片には■字形の横断面が好適であるが、その
他任意の断面形状の帯条片を用いることもできる。■字
形が特に好適とされるのは、個々の帯条片の製造が容易
であり、柱状構造の構成が簡単であり、他の形状の帯条
片を複数使用した場合に比べて剛性が高なるという理由
による。
帯条片をその両端部で相互に取付けして形成される柱状
体は長手方向に伸びる中央トンネルを備え、共振部材の
少なくとも一部が前記トンネル内部に配設されてその近
位端部が前記トンネルの内側端部に取付けされる。
本発明の特に好適な実施態様では、中央トンネルの内部
に配設される共振部材の部分が連結部分を含んでいる。
以下、この好適実施態様に関連して本発明をより詳細に
説明する。前記連結部分の前記トンネル端部への取付け
は螺合、ろう付けよたは溶接によって行うことができる
。また必要に応じてトランスジューサを形成する帯条片
の端部をろう付けまたは一溶接する際に同時に行っても
よい。
さらに、振動器にその長手方向に伸びる中心孔を設ける
こともでき、該中心孔の直径は吸引流体または潅注流体
を輸送する管を収容し得るに十分な大きさとする。前記
輸送管はトランスジューサの近位端部から振動器に入り
、連結部分の中心軸に沿って伸びた後、前記連結部分の
遠位端部に取付けされている外科用ツール等の動作部材
に入る。
本発明による好適実施態様の振動器は連結部分を介して
超音波振動トランスジューサに連結される外科用ツール
を含む外科用ハンドピースへの使板トランスジューサの
内側端部が前記トンネル内部に配設された連結部分の近
位端部に連結され、この連結部分が超音波振動を変換す
る。前記連結部分の遠位端部は外科用ツールの近位端部
へ取付けられる。外科用ツールの形状および質量は、該
ツールが例えば組織の切断に適合するような増幅の得ら
れるものとする。トランスジューサと連結部分とツール
とが端端間で一列に結合される構造の典型的な外科用ハ
ンドピースが特許第４．２２３．６７６号に開示されて
いる。本発明による折畳み形共振器を内蔵したハンドピ
ースは連結部分がトランスジューサの内部に配設される
ため、前記先行特許のハンドピースより小型化されてお
り、従って取扱い操作がより簡単である。
次に添付図面に示した従来技術によるハンドピースおよ
び本発明の好適実施態様に関連して本発明をより詳細に
説明する。
添付図面の第１図を参照すると、典型的な従来形超音波
共振振動器は連結部２′および外科用ツール３′と直線
状に連結されたトランスジューサ１′を含む。装置の各
部材の長さは後述するような共撮＠勅器に使用する材料
における個々の音速と動作周波数によって決定され、結
果的に得られるハンドピースの全長は個々の部材の長さ
の合計となるため、結果的に外科医にとって扱いにくい
厄介な装置になる場合がある。
本発明の折畳み形共娠器を設けることで前記の装置の全
長が大幅に短縮される。折畳み形共振器トランスジュー
サを形成し、このトランスジューサの中心軸に沿って延
びる中央トンネルを設けるスジューサは、それぞれ実質
的にＶ字形の横断面を有する複数の帯条片、例えば１６
〜４５個、好適には３６個の帯条片から形成した柱状体
１を含む。磁気歪材料はニッケル合金に酸化物被覆を施
したちのが好適である。
各Ｖ字形横断面のそれぞれの辺４が隣接するＶ字形帯条
片の辺と接触方る。−・股に前記辺と辺の間隔５は角度
α（第４図）によって定義され、好適には８°〜２３°
である。各帯条片の長さは使用する磁気歪材料の動作周
波数および音速によって決定される。共振器の長さと連
結部分およびツールを合わせた長さを等しくする。好適
実施態様の寸法を次に示す。
各帯条片の厚さは約０．００７〜００１０インチ（約０
．０１８〜０．０２５　ｃｍ＞である。
各帯条片をその近位端部６と遠位端部７で隣接する帯条
片にろう付けまたは溶接する。好適実施態様ではステン
レス鋼笠の適当な金属から成るフェースリングを取付は
具６として使用し、これをフィン付き柱状体にろう付け
または溶接すると共に内径的０．０３７５インチ（約０
．９９５３ｃｍ＋）の雌ねじ（不図示）を設ける。取付
は具７も６と同様のフェースリングとしてよい。このよ
うなフェースリングを用いることによって、結果的に得
られる柱状体に所望の硬さと剛性を付６できる他、一方
のフェースリングを連結部分２の取付は手段とすること
ができる。
半径方向に伸びるフィンを備えた柱状体は長手方向に延
びる孔を有し、この孔が好適には柱状体の中心軸と同心
の実質的に円形断面を有する中央トンネル８を形成する
。好適実施態様では、トランスジューサを形成する柱状
体が、長さ約２．６インヂ（約６．７ｃｒＲ）の断面Ｖ
字形帯条片を３６個含む。
トンネル８の直径は適当な連結部を収容できるだけの大
きさとする。このような部材を含む好適実す１を含む超
音波共振振動器を概略的に示した図であり、フィンを形
成する帯条片の各々がその近位端部においてフェースリ
ング６に、遠位端部においてフェースリング７にろう付
けまたは溶接されている。トランスジューサは中央トン
ネル８を備えており、その中に近位端部にねじを切った
連結部材２が収容されてる。連結部分は前記ねじ切り近
位端部をフェースリング６の雌ねじと螺合することによ
ってトランスジューサに取付けられる。
好適実施態様では、前記連結部分は、長さが波長の４分
の３にあたる約６．０インチ（杓１５ｃｍ）であり、外
径が約０．３７５インチ（約０．９５３ｃＩＲ）である
ステンレス鋼製の管を含んで成る。ここに示した実施態
様では、連結部分の中心孔に吸引管９が挿入されて定位
置に保持されており、連結部分の節領域またはその付近
に１つまたはそれ以上の密封リング１０を漏えている。
トランスジューサを駆動する場は励磁コイル１１から誘
導される。
トランスジューサと連結部分はプラスチック製ハウジン
グ１３の内部に設けたプラスチック製ボビン１２の中に
配設される。
第５図に示した実施態様は適当なツール３　く縮尺率は
一定でない）を連結部分の遠位端部に、従来の方法、例
えばねじ付きコネクタを介して取付けることによって完
成される。前記ツールの遠位端部に組織分断用デツプ１
４が設けられる。この実施態様では、連結部分２と外科
用ツール３とを組合せて共振部材とすることができる。
上に述べたような本発明による折畳み形共振器を内蔵し
た外科用ハンドピースは、従来の長いハンドピースに比
べて長さが短く、取扱い易く、使用し易いものである。
さらに、本発明によるフィン付きトランスジューサを内
蔵したハンドピースは従来の成層形トランスジューサを
組込んだものに比較して投入電力が少なくて済むという
知見も得でおり、これは本発明の折畳み形共振器の別の
利点を示すものである。さらに、本発明は不用組織を中
心部を通って完全に吸引することを可能にしているため
、外科用配管をハンドピースの近位端部で連結すること
ができ、指で握る部分を短くすっきりしたものにするこ
とができる。
さらに、本発明による折畳み形共振器を内蔵した外科用
ハンドピースは、直線状の連結部分だけでなく湾曲した
連結部分や湾曲したツールその他の中間部材とも使用で
きるという知見も得ている。
【図面の簡単な説明】
第１図は、先行技術によるトランスジューサ、連結部分
およびツールの配置状態を示す超音波共振派ａ器の概略
側面図、第２図は本発明による振ｖＪ鼎に使用されるフ
ィン付きトランスジューサの長手方向断面図、第３図は
第２図の３−３線に沿っも取った横断面図、第４図は第
２図のトランスジ１−→ノに使用される■字形帯条片を
示す拡大横断面図、第５図は本発明の追音波共振振動器
を内蔵した外科用ハンドピースの一部を示す部分縦断（
柱状体）、２・・・・・・連結部材、３・・・・・・外
科用ツール、６．７・・・・・・フェースリング。

Claims (8)

    【特許請求の範囲】
  1. （１）近位端部と遠位端部を有する共振部材と、前記共
    振部材に伝達される超音波振動を発生する超音波振動磁
    気歪トランスジューサとを含んで成る超音波共振振動器
    であつて、このトランスジューサが磁気ひずみ材料から
    成る複数の細長い帯状片を含んでおり、各帯状片が近位
    端部と遠位端部を有し、且つこの両端部において隣接帯
    条片に取付けされて一体で実質的に剛性の柱状体を形成
    しており、こうして形成された柱状体は中心軸を有し、
    該中心軸に関して半径方向に伸びるフィンを備え、且つ
    前記中心軸に沿って同心的に中央トンネルを形成する長
    手方向孔を有しており、前記共振部材の少なくとも一部
    がこのトンネルの内部に配設され、且つ前記近位端部に
    おいてこのトンネルの内側に取付けされている超音波共
    振振動器。
  2. （２）前記共振部材が近位端部と遠位端部を有する連結
    部分を含んでおり、前記近位端部が共振部材の近位端部
    に相当し、前記遠位端部は動作部材に連結するように構
    成されている請求項１に記載の振動器。
  3. （３）前記中央トンネルの横断面が実質的に円形である
    請求項１に記載の振動器。
  4. （４）磁気歪トランスジューサの各細長の帯条片が実質
    的にＶ字形の横断面を有しており、Ｖの字のそれぞれの
    辺が帯条片の長手方向の長さによつて形成されている請
    求項１に記載の振動器。
  5. （５）各帯条片の両端部における隣接帯条片の両端部へ
    の取付けが、ろう付けまたは溶接によって行なわれてい
    る請求項４に記載の振動器。
  6. （６）各Ｖ字形帯条片のそれぞれの辺が、この帯条片の
    全長手方向長さに亘つてすぐ隣りの帯条片の辺と接触し
    て半径方向に伸びるフィンを形成しており、こうして得
    られるフィンが結果的に得られる実質的に剛性の柱状体
    の長手方向に伸びる中央トンネルの周りに放射状パター
    ンを形成している請求項４に記載の振動器。
  7. （７）前記動作部材が外科用ツールである請求項２に記
    載の振動器。
  8. （８）前記連結部分がその長手方向に伸びる中心孔を含
    んでおり、前記中心孔の直径が流体輸送用の管を収容で
    きるのに十分の大きさである請求項２に記載の振動器。
JP1330969A 1988-12-20 1989-12-20 超音波共振振動器 Granted JPH02271851A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/287,749 US4978333A (en) 1988-12-20 1988-12-20 Resonator for surgical handpiece
US287749 1988-12-20

Publications (2)

Publication Number Publication Date
JPH02271851A true JPH02271851A (ja) 1990-11-06
JPH0560754B2 JPH0560754B2 (ja) 1993-09-02

Family

ID=23104170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1330969A Granted JPH02271851A (ja) 1988-12-20 1989-12-20 超音波共振振動器

Country Status (11)

Country Link
US (1) US4978333A (ja)
EP (1) EP0376562B1 (ja)
JP (1) JPH02271851A (ja)
AT (1) ATE113462T1 (ja)
AU (1) AU609652B2 (ja)
CA (1) CA2005877C (ja)
DE (1) DE68919201T2 (ja)
DK (1) DK646789A (ja)
ES (1) ES2062045T3 (ja)
FI (1) FI96825C (ja)
NO (1) NO178092C (ja)

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CA2005877C (en) 1993-09-07
US4978333A (en) 1990-12-18
FI896089A0 (fi) 1989-12-19
ATE113462T1 (de) 1994-11-15
DK646789A (da) 1990-06-21
EP0376562A2 (en) 1990-07-04
NO178092C (no) 1996-01-24
ES2062045T3 (es) 1994-12-16
AU4701789A (en) 1990-07-12
DK646789D0 (da) 1989-12-19
FI96825B (fi) 1996-05-31
JPH0560754B2 (ja) 1993-09-02
AU609652B2 (en) 1991-05-02
NO895118L (no) 1990-06-21
NO895118D0 (no) 1989-12-19
EP0376562B1 (en) 1994-11-02
CA2005877A1 (en) 1990-06-20
DE68919201T2 (de) 1995-03-23
FI96825C (fi) 1996-09-10
NO178092B (no) 1995-10-16
EP0376562A3 (en) 1992-01-22
DE68919201D1 (de) 1994-12-08

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