JP3331172B2 - 内視鏡用異物回収具 - Google Patents

内視鏡用異物回収具

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Publication number
JP3331172B2
JP3331172B2 JP16465198A JP16465198A JP3331172B2 JP 3331172 B2 JP3331172 B2 JP 3331172B2 JP 16465198 A JP16465198 A JP 16465198A JP 16465198 A JP16465198 A JP 16465198A JP 3331172 B2 JP3331172 B2 JP 3331172B2
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JP
Japan
Prior art keywords
foreign matter
endoscope
foreign
distal end
recovery tool
Prior art date
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Expired - Lifetime
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JP16465198A
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English (en)
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JPH11346993A (ja
Inventor
輝雄 大内
Original Assignee
旭光学工業株式会社
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Priority to JP16465198A priority Critical patent/JP3331172B2/ja
Priority to US09/327,464 priority patent/US6206904B1/en
Priority to DE19926710A priority patent/DE19926710B4/de
Publication of JPH11346993A publication Critical patent/JPH11346993A/ja
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/50Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22031Gripping instruments, e.g. forceps, for removing or smashing calculi
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/221Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/22031Gripping instruments, e.g. forceps, for removing or smashing calculi
    • A61B2017/22034Gripping instruments, e.g. forceps, for removing or smashing calculi for gripping the obstruction or the tissue part from inside
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22072Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/221Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • A61B2017/2215Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having an open distal end
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2932Transmission of forces to jaw members
    • A61B2017/2939Details of linkages or pivot points

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)
  • Endoscopes (AREA)

Description

【発明の詳細な説明】
【0001】
【発明の属する技術分野】この発明は、体腔内から異物
を回収するために内視鏡の処置具挿通チャンネルに挿脱
して使用される内視鏡用異物回収具に関する。
【0002】
【従来の技術】内視鏡用異物回収具は、一般に、内視鏡
の処置具挿通チャンネルに挿脱される可撓性シースの先
端に、手元側からの遠隔操作によって開閉される複数の
異物捕獲腕が設けられていて、各異物捕獲腕の内面部
に、異物との係合を強めるための爪等が突出形成されて
いる。
【0003】
【発明が解決しようとする課題】上述のような従来の内
視鏡用異物回収具を使用する際には、複数の異物捕獲腕
で異物を摘むように挟み付けて捕獲する。
【0004】しかし、例えば図22〜図24に示される
ように、5円硬貨101のような薄い金属片や筒状の小
物102、或いは歯冠103のように表面がツルツルし
た異物等は、異物捕獲腕50の間に摘もうとしても滑っ
てしまって摘み難く、回収するのが困難な場合が少なく
ない。
【0005】特に、図25に示されるように、そのよう
な異物100が気管支等のような細い管腔内に詰まった
状態になっている場合には、異物捕獲腕50を異物10
0より大きく広げるのが困難なため異物100を摘む動
作を行うことができず、異物100の回収は極めて困難
である。
【0006】そこで本発明は、摘んで捕獲回収するのが
困難な異物であっても、異物の形状によっては容易に捕
獲回収することができる内視鏡用異物回収具を提供する
ことを目的とする。
【0007】
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡用異物回収具は、内視鏡の処置具挿
通チャンネルに挿脱される可撓性シースの先端に、手元
側からの遠隔操作によって開閉される複数の異物捕獲腕
が設けられた内視鏡用異物回収具において、上記異物捕
獲腕の外面部に、異物と係合させるための係合部を形成
したことを特徴とする。
【0008】なお、上記係合部が、上記異物捕獲腕の先
端部分から外方又は側方にフック状に突設されていても
よく、その場合、上記異物捕獲腕が、先寄りの部分が内
側に偏位するように中間部分で屈曲形成されていてもよ
い。また上記係合部が、上記異物捕獲腕の先端部分の内
外双方にまたがって突設されていてもよい。
【0009】また、上記係合部が、上記異物捕獲腕の外
面に沿って鋸歯状に形成されていてもよい。
【0010】
【発明の実施の形態】図面を参照して本発明の実施の形
態を説明する。図1と図2は、本発明の第1の実施の形
態の内視鏡用異物回収具の先端部分を示している。図示
されていない内視鏡の処置具挿通チャンネルに挿脱され
る可撓性シース1は、ステンレス鋼線を密着巻きしたコ
イルパイプによって形成されており、その直径は1.5
〜2mm程度、長さは1.5m〜2m程度である。
【0011】シース1の先端に固着された支持枠2に形
成されたスリット3内には、パンタグラフ状のリンク機
構4が配置されていて、そのリンク機構4に連結された
一対の異物捕獲腕5が、支軸6によって支持枠2の先端
近傍に回動自在に支持されて、前方に向けて突出配置さ
れている。
【0012】リンク機構4の後端側に連結されたワイヤ
連結軸7には、軸線方向に進退自在にシース1内に挿通
された操作ワイヤ8の先端が連結固着されており、操作
ワイヤ8は、シース1の手元側端部に連結された操作部
(図示せず)により進退操作することができる。
【0013】このような構成により、手元側において操
作ワイヤ8を進退操作することによって、リンク機構4
が動作し、異物捕獲腕5を嘴状に開閉させることができ
る。なお、図1は操作ワイヤ8が先側に押し込まれて異
物捕獲腕5が開いた状態を示し、図2は操作ワイヤ8が
手元側に牽引されて異物捕獲腕5が閉じた状態を示して
いる。
【0014】一対の異物捕獲腕5は、各々細長い棒状に
形成されているが、各異物捕獲腕5の先端には、体腔内
から異物を回収する際に異物と係合させるための係合部
10が、開閉方向の外面部分に外方に向けて「レ」の字
状に突出したフック状に形成されている。その使用状態
については後述する。
【0015】図3と図4は、本発明の第2の実施の形態
の内視鏡用異物回収具の先端部分が開閉した状態を示し
ており、体腔内から異物を回収する際に異物と係合させ
るための係合部10として、一対の異物捕獲腕5の開閉
方向の外面に沿って鋸歯状の凹凸(ギザギザ)を形成し
たものである。その他は第1の実施の形態と同じであ
る。
【0016】図5と図6は、本発明の第3の実施の形態
の内視鏡用異物回収具の先端部分が開閉した状態を示し
ている。この実施の形態においては、シース1として、
例えば四フッ化エチレン樹脂チューブ等からなる可撓性
チューブが用いられている。
【0017】異物捕獲腕5は、バネ性のあるステンレス
鋼線材等を外方に広がるように滑らかに曲げて形成され
ており、正面(図において方)から見て約90°間隔
に4本設けられている。
【0018】但し異物捕獲腕5は、約120°間隔に3
本の配置でもよく、約180°間隔に2本の配置でもよ
い。或いは、その他の配置にしてもよい。これは以下の
全実施の形態においても同様である。
【0019】複数の異物捕獲腕5の基端は一束にまとめ
られて、シース1内において操作ワイヤ8の先端に固着
された連結パイプ9に差し込まれて固着され、連結パイ
プ9を介して操作ワイヤ8と連結されている。
【0020】したがって、操作ワイヤ8を手元側からシ
ース1内に押し込むと、図5に示されるように異物捕獲
腕5が自己の弾性によって花びら状に広がり、操作ワイ
ヤ8を手元側へ牽引すると、図6に示されるように異物
捕獲腕5がシース1の先端内に引き込まれて窄まった状
態に弾性変形する。
【0021】このように構成された各異物捕獲腕5の先
端には、体腔内から異物を回収する際に異物と係合させ
るための係合部10が、開閉方向の外方に向けて「U」
の字のフック状に曲げ戻されて形成されている。係合部
10は、異物捕獲腕5がシース1内に引き込まれた状態
においては、図6に示されるようにシース1の先端面に
隣接して位置する。
【0022】図7と図8は、本発明の第4の実施の形態
の内視鏡用異物回収具の先端部分が開閉した状態を示し
ている。この実施の形態においては、係合部10が、異
物捕獲腕5の先端をほぼ直角に外方に折り曲げられたフ
ック状に形成されている。
【0023】また、図7に示されるように、異物捕獲腕
5の中間部分を先側半部が少し内側に偏位するように曲
げて、フック状係合部10の先端が、異物捕獲腕5の外
壁面の延長線Aより内側に位置するように形成されてい
る。
【0024】その結果、図8に示されるように、係合部
10がシース1内に入る状態まで異物捕獲腕5をシース
1内に完全に引き込むことができる。その他の構成は第
3の実施の形態と同じである。
【0025】図9は、本発明の第5の実施の形態の内視
鏡用異物回収具の先端部分が閉じた状態を示している。
この実施の形態の構成は、複数の異物捕獲腕5の長さを
少し相違させてある点以外第4の実施の形態と同じであ
り、異物捕獲腕5の長さをずらすことによって、シース
1内への係合部10の収納がより容易になる。
【0026】図10は、本発明の第6の実施の形態の内
視鏡用異物回収具の先端部分が開いた状態を示してい
る。この実施の形態の構成は、図7と図8に示される第
4の実施の形態と比較して、異物捕獲腕5に対する係合
部10の向きが相違するだけである。
【0027】この実施の形態では、係合部10が、異物
捕獲腕5の開閉方向の外方に向かってまともに曲げられ
ているのではなく、外方と側方の中間の斜め方向に曲げ
て形成されている。
【0028】そのように構成することにより、異物捕獲
腕5をシース1内に引き込んだとき、図11に示される
ように、各係合部10を干渉しないようにシース1内に
収納することができる。なお、図12に示される第7の
実施の形態のように、係合部10を、異物捕獲腕5の開
閉方向に対して側方に曲げて形成しても差し支えない。
【0029】図13は、本発明の第8の実施の形態の内
視鏡用異物回収具の先端部分が開いた状態を示してい
る。この実施の形態の構成は、図と図に示される第
の実施の形態と係合部10の形状が相違するだけであ
り、異物捕獲腕5の先端部分を小さなループ状に外方に
曲げて係合部10が形成されている。
【0030】なお、図14に示される第9の実施の形態
のように、ループ状の係合部10を異物捕獲腕5の先端
の内外双方にまたがって突出する状態に形成してもよ
い。このようにすれば、内側に異物等を摘んで回収する
従来と同じ使い方にも用いることができる。
【0031】図15〜図20は、本発明の内視鏡用異物
回収具の使用例を示している。各図に示されている内視
鏡用異物回収具は上述の実施の形態の一部であるが、各
使用方法にどの実施の形態の内視鏡用異物回収具を用い
ても差し支えない。なお内視鏡用異物回収具は、いずれ
の場合も内視鏡の処置具挿通チャンネルに通して使用さ
れる。
【0032】図15は体腔内から5円硬貨101を回収
する状態を示しており、異物捕獲腕5を硬貨101の孔
に通して開き方向に作動させることにより、フック状の
係合部10が硬貨101の背面部分に引っ掛かるので、
硬貨101を落下させることなく容易に回収することが
できる。
【0033】硬貨101を横にできないような狭い管腔
内の場合には、図16に示されるように、一本の異物捕
獲腕5だけを硬貨101の孔に通して係合部10を孔に
引っ掛けた状態で回収することもできる。
【0034】体腔内に飲み込まれた筒状の小物102を
回収する場合には、図17に示されるように、異物捕獲
腕5を筒状の小物102に通して開き方向に作動させる
ことにより、フック状の係合部10が小物102の裏側
端面に引っ掛かるので、小物102を落下させることな
く回収することができる。
【0035】また、歯冠103を回収する場合には、図
18に示されるように、異物捕獲腕5を歯冠103内に
差し込んで広げることにより、異物捕獲腕5の外面に形
成された係合部10が歯冠103の内面に引っ掛かるの
で、歯冠103を落下させることなく回収することがで
きる。
【0036】このように、異物捕獲腕5を異物に対して
内側から係合させることができるので、図19に示され
るように、異物100が気管支等のような細い管腔内に
詰まった状態になっている場合でも、異物捕獲腕5を異
物100に係合させて容易に回収することができる。
【0037】そして、図20に示されるように、小さな
異物100は複数の異物捕獲腕5のうちの一つだけを係
合させて回収することもできる。30は内視鏡である。
このような使用法をとる場合には、図21に示されるよ
うに、異物捕獲腕5を一本だけにしても差し支えない。
【0038】
【発明の効果】本発明によれば、異物捕獲腕の外面部
に、異物と係合させるための係合部を形成したことによ
り、異物捕獲腕を異物に対して内側から係合させて捕獲
することができるので、摘んで捕獲回収するのが困難な
異物であっても、その形状によっては容易に捕獲回収す
ることができる。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態の内視鏡用異物回収
具の先端部分の開状態の側面断面図である。
【図2】本発明の第1の実施の形態の内視鏡用異物回収
具の先端部分の閉状態の側面断面図である。
【図3】本発明の第2の実施の形態の内視鏡用異物回収
具の先端部分の開状態の側面断面図である。
【図4】本発明の第2の実施の形態の内視鏡用異物回収
具の先端部分の閉状態の側面断面図である。
【図5】本発明の第3の実施の形態の内視鏡用異物回収
具の先端部分の開状態の側面断面図である。
【図6】本発明の第3の実施の形態の内視鏡用異物回収
具の先端部分の閉状態の側面断面図である。
【図7】本発明の第4の実施の形態の内視鏡用異物回収
具の先端部分の開状態の側面断面図である。
【図8】本発明の第4の実施の形態の内視鏡用異物回収
具の先端部分の閉状態の側面断面図である。
【図9】本発明の第5の実施の形態の内視鏡用異物回収
具の先端部分の閉状態の側面断面図である。
【図10】本発明の第6の実施の形態の内視鏡用異物回
収具の先端部分の開状態の正面図である。
【図11】本発明の第6の実施の形態の内視鏡用異物回
収具の先端部分の閉状態の正面断面図である。
【図12】本発明の第7の実施の形態の内視鏡用異物回
収具の先端部分の開状態の正面図である。
【図13】本発明の第8の実施の形態の内視鏡用異物回
収具の先端部分の開状態の側面断面図である。
【図14】本発明の第9の実施の形態の内視鏡用異物回
収具の先端部分の開状態の側面断面図である。
【図15】本発明の内視鏡用異物回収具の使用例を示す
略示図である。
【図16】本発明の内視鏡用異物回収具の使用例を示す
略示図である。
【図17】本発明の内視鏡用異物回収具の使用例を示す
略示図である。
【図18】本発明の内視鏡用異物回収具の使用例を示す
略示図である。
【図19】本発明の内視鏡用異物回収具の使用例を示す
略示図である。
【図20】本発明の内視鏡用異物回収具の使用例を示す
略示図である。
【図21】異物捕獲腕を一本にした内視鏡用異物回収具
の側面断面図である。
【図22】従来の内視鏡用異物回収具の使用例を示す略
示図である。
【図23】従来の内視鏡用異物回収具の使用例を示す略
示図である。
【図24】従来の内視鏡用異物回収具の使用例を示す略
示図である。
【図25】従来の内視鏡用異物回収具の使用例を示す略
示図である。
【符号の説明】
1 シース 5 異物捕獲腕 8 操作ワイヤ 10 係合部

Claims (3)

    (57)【特許請求の範囲】
  1. 【請求項1】内視鏡の処置具挿通チャンネルに挿脱され
    る可撓性シースの先端に、手元側からの遠隔操作によっ
    て開閉される複数の異物捕獲腕が設けられた内視鏡用異
    物回収具において、 物と係合させるための係合部を、上記異物捕獲腕の先
    端部分から外方又は側方にフック状に突出形成したこと
    を特徴とする内視鏡用異物回収具。
  2. 【請求項2】上記異物捕獲腕が、先寄りの部分が内側に
    偏位するように中間部分で屈曲形成されている請求項
    記載の内視鏡用異物回収具。
  3. 【請求項3】上記係合部が、上記異物捕獲腕の先端部分
    の内外双方にまたがって突設されている請求項記載の
    内視鏡用異物回収具。
JP16465198A 1998-06-12 1998-06-12 内視鏡用異物回収具 Expired - Lifetime JP3331172B2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP16465198A JP3331172B2 (ja) 1998-06-12 1998-06-12 内視鏡用異物回収具
US09/327,464 US6206904B1 (en) 1998-06-12 1999-06-08 Foreign body-recovering instrument for endoscope
DE19926710A DE19926710B4 (de) 1998-06-12 1999-06-11 Instrument zum Entfernen eines Fremdkörpers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16465198A JP3331172B2 (ja) 1998-06-12 1998-06-12 内視鏡用異物回収具

Publications (2)

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JPH11346993A JPH11346993A (ja) 1999-12-21
JP3331172B2 true JP3331172B2 (ja) 2002-10-07

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JP (1) JP3331172B2 (ja)
DE (1) DE19926710B4 (ja)

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US6206904B1 (en) 2001-03-27
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DE19926710A1 (de) 1999-12-16

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