JPH0560754B2 - - Google Patents

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Publication number
JPH0560754B2
JPH0560754B2 JP1330969A JP33096989A JPH0560754B2 JP H0560754 B2 JPH0560754 B2 JP H0560754B2 JP 1330969 A JP1330969 A JP 1330969A JP 33096989 A JP33096989 A JP 33096989A JP H0560754 B2 JPH0560754 B2 JP H0560754B2
Authority
JP
Japan
Prior art keywords
vibrator
strip
resonant
proximal end
tunnel
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.)
Expired - Fee Related
Application number
JP1330969A
Other languages
English (en)
Other versions
JPH02271851A (ja
Inventor
Buroodoin Aran
Kureesatsuteru Kurausu
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
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 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)

Description

【発明の詳細な説明】 本発明は超音波共振振動器、詳細には外科用ハ
ンドピースに使用する改良形磁気歪トランスジユ
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機内蔵
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第4223676
号に開示されており、その開示内容を本明細書に
も含むものとする。米国特許第4223676号に記載
の装置では、磁気歪トランスジユーサとして米国
特許第RE25033号に教示されているようなニツケ
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ツケル
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
言つ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。
成層形トランスジユーサが適正に機能するため
には、 １ 機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ユ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、またその加熱によつ
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、一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287748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イ
ンの形に配設した実質的に剛性の柱状体としてト
ランスジユーサを形成することによつて克服する
ことができる。
米国特許出願第287748号の改良形磁気歪トラン
スジユーサは複数の磁気歪材料帯条片を含んで成
り、欠く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
フインを備えた実施的に剛性の柱状体を形成して
いる。
米国出願第287748号に開示されたフイン付き磁
気歪トランスジユーサに共振部材の少なくとも一
部、特に超音波振動を外科用ツール等の動作部材
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
ることによつて、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ユ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」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
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ユーサ
とを含んで成る超音波共振振動器であつて、この
トランスジユ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
るフインを備え、且つ前記中心軸に沿つて同心的
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
に配設され且つ前記近位端部においてトンネルの
内側に取付け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、中心慈雨を中心とす
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、トランスジユーサの各細長い帯条片
が実質的にＶ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つて形成さ
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
は溶接によつて行うことができる。また、Ｖ字形
帯条片のそれぞれの辺をすぐ隣りの帯条片の辺と
その長さ全体に亘つて接触させて半径方向に伸び
るフインを形成し、結果的に得られるフインが結
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なる振動器であ
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
よつて従来のハンドピースより短くなり、その結
果従来のハンドピ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
み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
孔を設けて、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。
本発明の振動器に使用するトランスジユーサ
は、従来の成層形トランスジユーサと対照的に、
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手
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インとを備える。前記フイン
はニツ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
接によつ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Ｖ字形の横断面とし、“Ｖ”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つ
て接触するように帯条片を整列させることによつ
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、このようなフインを
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、それによつ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つて
いる。
縦長の帯条片にはＶ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。Ｖ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、ろう付けま
たは溶接によつて行うことができる。また必要に
応じてトランスジユーサを形成する帯条片の端部
をろう付けまたは溶接する際に同時に行つてもよ
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
または灌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ユーサ
の近位端部から振動器に入り、連結部分の中心軸
に沿つて伸びた後、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ユーサに連結され
る外科用ツールを含む外科用ハンドピースへの使
用に特に適合させたものである。このような装置
では、中央トンネルを有するフイン付き磁気歪ト
ランスジユ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。トランスジユーサと連結部分
とツールとが端端間に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4223676号に
開示されている。本発明により折畳み形共振器を
内蔵したハンドピースは連結部分がトランスジユ
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、従つて取扱い
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ユーサ
１′を含む。装置の各部材の長さは後述するよう
な共振振動器に使用する材料における個々の音速
と動作周波数によつて決定され、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つて扱いにくい
厄介な装置になる場合がある。
本発明の折畳み形共振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
は、第２図と第３図に示すように、複数の帯条片
を放射状に配設してフイン付き構造の磁気歪トラ
ンスジユーサを形成し、このトランスジユーサの
中心軸に沿つて延びる中央トンネルを設けること
によつて実現することができる。
第２図および第３図に示した磁気歪トランスジ
ユーサは、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
材料はニツケル合金に酸化物被覆を施したものが
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する。一般に前記辺と辺の
間隔５は角度α（第４図）によつて定義され、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つて決
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0.007〜0.010インチ（約
0.018〜0.025cm）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等の適当な金属から成るフ
エースリングを取付け具６として使用し、これを
フイン付き柱状体にろう付けまたは溶接すると共
に内径約0.0375インチ（約0.9953cm）の雌ねじ
（不図示）を設ける。取付け具７も６と同様のフ
エースリングとしてよい。このようなフエースリ
ングを用いることによつて、結果的に得られる柱
状体に所望の硬さと剛性を付与できる他、一方の
フエースリングを連結部分２の取付け手段とする
ことができる。
半径方向に伸びるフイ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
ンスジユーサを形成する柱状体が、長さ約2.6イ
ンチ（約6.7cm）の断面Ｖ字径帯条片を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
施態様を第５図に示す。
第５図はフイン付き磁気歪トランスジユーサ１
を含む超音波共振振動器を概略的に示した図であ
り、フインを形成する帯条片の各々がその近位端
部においてフエースリング６に、遠位端部におい
てフエースリング７にろう付けまたは溶接されて
いる。トランスジユ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つた連結部
材２が収容されてる。連結部分は前記ねじ切り近
位端部をフエースリング６の雌ねじと螺合するこ
とによつてトランスジユ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（約15cm）であり、
外径が約0.375インチ（約0.953cm）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を備えている。
トランスジユーサを駆動する場は励磁コイル１
１から誘導される。
トランスジユーサと連結部分はプラスチツク製
ハウジング１３の内部に設けたプラスチツク製ボ
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（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
けることによつて完成される。前記ツールの遠位
端部に組織分断用チツプ１４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、本発明によるフイン付きトランスジユ
ーサを内蔵したハンドピースは従来の成層形トラ
ンスジユ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ており、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つて
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つきりしたものに
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ユーサ、
連結部分およびツールの配置状態を示す超音波共
振振動器の概略側面図、第２図は本発明による振
動器に使用されるフイン付きトランスジユーサの
長手方向断面図、第３図は第２図の３−３線に沿
つて取つた横断面図、第４図は第２図のトランス
ジユーサに使用されるＶ字形帯条片を示す拡大横
断面図、第５図は本発明の超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
面図である。 １……フイン付き磁気歪トランスジユーサ（柱
状体）、２……連結部材、３……外科用ツール、
６，７……フエースリング。

Claims (1)

  1. 【特許請求の範囲】 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ユーサとを含んで成る
    超音波共振振動器であつて、このトランスジユー
    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インを
    備え、且つ前記中心軸に沿つ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 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 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 磁気歪トランスジユ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 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つて行
    なわれている請求項４に記載の振動器。 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インを形成して
    おり、こうして得られるフイ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 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 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
US287749 1988-12-20
US07/287,749 US4978333A (en) 1988-12-20 1988-12-20 Resonator for surgical handpiece

Publications (2)

Publication Number Publication Date
JPH02271851A JPH02271851A (ja) 1990-11-06
JPH0560754B2 true 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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FI96825B (fi) 1996-05-31
EP0376562B1 (en) 1994-11-02
CA2005877C (en) 1993-09-07
DE68919201D1 (de) 1994-12-08
FI896089A0 (fi) 1989-12-19
NO178092B (no) 1995-10-16
DK646789D0 (da) 1989-12-19
FI96825C (fi) 1996-09-10
AU609652B2 (en) 1991-05-02
EP0376562A2 (en) 1990-07-04
NO895118D0 (no) 1989-12-19
DE68919201T2 (de) 1995-03-23
EP0376562A3 (en) 1992-01-22
JPH02271851A (ja) 1990-11-06
AU4701789A (en) 1990-07-12
NO895118L (no) 1990-06-21
NO178092C (no) 1996-01-24
DK646789A (da) 1990-06-21
ES2062045T3 (es) 1994-12-16
ATE113462T1 (de) 1994-11-15
CA2005877A1 (en) 1990-06-20
US4978333A (en) 1990-12-18

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