JPH10192296A - Dormia-type foreign matter remover for endoscope - Google Patents
Dormia-type foreign matter remover for endoscopeInfo
- Publication number
- JPH10192296A JPH10192296A JP541997A JP541997A JPH10192296A JP H10192296 A JPH10192296 A JP H10192296A JP 541997 A JP541997 A JP 541997A JP 541997 A JP541997 A JP 541997A JP H10192296 A JPH10192296 A JP H10192296A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- cage
- elastic
- dormia
- foreign matter
- 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.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements 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
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements 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
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、内視鏡の鉗子チ
ャンネルに挿通されて体腔内の異物等を摘出するために
使用される内視鏡用ドルミア型異物摘出具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dormia-type foreign matter extractor for an endoscope, which is inserted into a forceps channel of an endoscope and used to remove foreign matter and the like in a body cavity.
【０００２】[0002]
【従来の技術】体腔内から異物などを摘出するために、
各種のバスケット型異物摘出具が存在するが、いわゆる
ドルミア型の異物摘出具は、紡錘形のケージを形成する
複数の弾性ワイヤが全体として螺旋状に捩じられている
ことに特徴がある。2. Description of the Related Art In order to remove foreign matter from a body cavity,
Although there are various basket-type foreign object extracting tools, a so-called dolmia type foreign object extracting tool is characterized in that a plurality of elastic wires forming a spindle-shaped cage are spirally twisted as a whole.
【０００３】そのような捩じりがあることにより、細い
管腔内等においてケージを前後に進退させたときケージ
がネジ状に回転するので、例えば尿道、胆管、血管など
のように細い管腔内の異物をケージ内に容易に取り込ん
で摘出することができる。[0003] Such a twist causes the cage to rotate in a screw shape when the cage is moved back and forth in a narrow lumen or the like, so that a thin lumen such as a urethra, a bile duct, a blood vessel or the like is used. The foreign matter in the inside can be easily taken into the cage and extracted.
【０００４】そのような内視鏡用ドルミア型異物摘出具
のケージを形成する弾性ワイヤは、細い管腔内で粘液の
付着等があっても確実に紡錘形に広がるように、ある程
度の腰の強さが必要である。[0004] The elastic wire forming the cage of such a dormia-type foreign body extractor for endoscopes has a certain degree of stiffness so that even if there is adhesion of mucus or the like in a thin lumen, it spreads like a spindle. Is necessary.
【０００５】そこで従来は、弾性ワイヤとして、直径が
０．１５ｍｍ〜０．３ｍｍ程度のステンレス鋼線（単
線）を用い、これを３〜６本程度組にして前後両端で結
束し、紡錘形のケージを形成していた。Therefore, conventionally, a stainless steel wire (single wire) having a diameter of about 0.15 mm to 0.3 mm is used as an elastic wire, and a set of about 3 to 6 wires is bound at both front and rear ends to form a spindle-shaped cage. Had formed.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上述のように
単線で形成された弾性ワイヤは、疲労等によって切断す
る際には瞬時に切れてしまうので、体腔内での使用中に
切断すると非常に危険な状態になる可能性がある。However, since the elastic wire formed as a single wire as described above is instantaneously cut when it is cut due to fatigue or the like, it is very difficult to cut it during use in a body cavity. It can be dangerous.
【０００７】そこで本発明は、ケージを形成する弾性ワ
イヤに疲労による断線が発生し難く、断線した場合にも
安全性の高い内視鏡用ドルミア型異物摘出具を提供する
ことを目的とする。Accordingly, an object of the present invention is to provide a Dormia-type foreign matter extractor for an endoscope which is less likely to break due to fatigue in an elastic wire forming a cage and has high safety even in the event of a break.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡用ドルミア型異物摘出具は、少なく
とも３本の複数の弾性ワイヤの前後両端を結束して全体
を螺旋状に捩じって紡錘形に形成されたケージを、可撓
性のあるシース中に進退自在に挿通された操作ワイヤの
先端に連結して、上記操作ワイヤを基端側から牽引する
と上記ケージが上記シース中に引き込まれてすぼまり、
上記操作ワイヤを押して上記ケージを上記シース中から
押し出すと、上記弾性ワイヤの弾性力によって上記ケー
ジが紡錘形に膨らむようにした内視鏡用ドルミア型異物
摘出具において、上記弾性ワイヤとして、複数の素線を
撚り合わせた撚り線を用いたことを特徴とする。In order to achieve the above object, a dormia-type foreign matter extractor for an endoscope according to the present invention is formed by binding at least front and rear ends of a plurality of elastic wires to form a spiral. Is connected to the distal end of an operation wire that is inserted into a flexible sheath so as to be able to advance and retreat, and when the operation wire is pulled from the proximal end side, the cage becomes It is drawn into the sheath and shrinks,
When the operating wire is pushed and the cage is pushed out of the sheath, the cage is expanded into a spindle shape by the elastic force of the elastic wire. It is characterized by using a stranded wire obtained by twisting wires.
【０００９】なお、上記弾性ワイヤの断面係数Ｚが、0.
3307×10-3≦Ｚ≦2.646 ×10-3の範囲にあるとよく、上
記弾性ワイヤが、直径が０．１１ｍｍ〜０．２０ｍｍの
範囲の素線を３本撚り合わせて形成されていてもよく、
上記弾性ワイヤが、直径が０．０８ｍｍ〜０．１５ｍｍ
の範囲の素線を７本撚り合わせて形成されていてもよ
い。It is to be noted that the elastic wire has a sectional modulus Z of 0.
3307 × 10 −3 ≦ Z ≦ 2.646 × 10 −3 , and the elastic wire may be formed by twisting three strands having a diameter of 0.11 mm to 0.20 mm. Often,
The elastic wire has a diameter of 0.08 mm to 0.15 mm
May be formed by twisting seven strands in the range described above.
【００１０】[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及び図２は、本発明の内視鏡用ドル
ミア型異物摘出具の先端部分の側面断面図と正面図であ
る。１は、図示されていない内視鏡の鉗子チャンネルに
挿脱される可撓性のあるシースであり、例えば四フッ化
エチレン樹脂チューブによって形成されている。Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 are a side sectional view and a front view of a distal end portion of a dormia-type foreign matter extractor for an endoscope of the present invention. A flexible sheath 1 is inserted into and removed from a forceps channel of an endoscope (not shown), and is formed of, for example, a tetrafluoroethylene resin tube.
【００１１】シース１内には、操作ワイヤ２が軸線方向
に進退自在に挿通されていて、シース１の基端部に連結
された操作部（図示せず）からの操作によって押し引き
操作される。An operation wire 2 is inserted into the sheath 1 so as to be able to advance and retreat in the axial direction. The operation wire 2 is pushed and pulled by an operation from an operation unit (not shown) connected to the base end of the sheath 1. .
【００１２】操作ワイヤ２の先端には、四本の弾性ワイ
ヤ３によって紡錘形に形成されたケージ４が連結されて
いる。ケージ４の膨らんだ状態における長さは３０ｍｍ
〜４０ｍｍ程度、膨らみの直径は１０ｍｍ〜２０ｍｍ程
度である。A spindle 4 formed by four elastic wires 3 is connected to the distal end of the operation wire 2. The length of the cage 4 in the expanded state is 30 mm.
The diameter of the bulge is about 10 mm to 20 mm.
【００１３】四本の弾性ワイヤ３は、前後両端が先端チ
ップ５と連結管６に差し込まれ、そこでロー付け又は半
田付け等によって固着されて互いに結束され、全体が螺
旋状（スクリュー状）に捩じられている。連結管６の後
半部分には操作ワイヤ２の先端部分が差し込まれて、ロ
ー付け又は半田付け等によって固着されている。The four elastic wires 3 are inserted into the distal end tip 5 and the connecting tube 6 at the front and rear ends, and are fixed to each other by brazing or soldering and bound to each other, and are entirely screwed into a spiral shape (screw shape). Have been The distal end portion of the operation wire 2 is inserted into the rear half of the connecting pipe 6, and is fixed by brazing or soldering.
【００１４】その結果、操作部側から操作ワイヤ２を牽
引すると、図３に示されるようにケージ４がシース１中
に引き込まれてすぼまり、操作ワイヤ２を押してケージ
４をシース１の先端から押し出すと、図１に示されるよ
うに、弾性ワイヤ３の弾性力によってケージ４が紡錘形
に膨らむ。As a result, when the operation wire 2 is pulled from the operation unit side, the cage 4 is drawn into the sheath 1 and narrows as shown in FIG. 3, and the operation wire 2 is pushed to move the cage 4 to the distal end of the sheath 1. 1, the cage 4 expands in a spindle shape by the elastic force of the elastic wire 3 as shown in FIG.
【００１５】各弾性ワイヤ３としては、素線径の細いス
テンレス鋼線材を撚り合わせた撚り線が用いられてい
る。したがって、ケージ４をシース１内に出し入れする
ことによって連結管６への固着部付近（図３のＡ部）に
最も大きく生じる疲労が、単線に比べるとはるかに小さ
くて耐久性がある。As each elastic wire 3, a stranded wire obtained by twisting a stainless steel wire having a small element wire diameter is used. Therefore, when the cage 4 is put in and taken out of the sheath 1, the greatest fatigue near the portion fixed to the connecting pipe 6 (portion A in FIG. 3) is much smaller and more durable than a single wire.
【００１６】また、撚り線が疲労したときは、まず撚り
線の素線の中の一本が切れてそれが目視されるので、弾
性ワイヤ３が完全に切断する前に廃棄等適切な処理をと
ることができ、安全性が確保される。When the stranded wire is fatigued, one of the strands of the stranded wire is first cut and visually observed. Therefore, before the elastic wire 3 is completely cut, appropriate treatment such as disposal is performed. Safety can be ensured.
【００１７】ケージ４は、ある程度の粘液の付着などが
あっても自己の弾性力で紡錘形に膨らむように、腰の強
さが必要である。そのようなケージ４の腰の強さは、弾
性ワイヤ３の断面係数Ｚによって決まる。ただし、素線
径をｄとして、Ｚ＝πd3/32である。The cage 4 needs to be strong enough to expand into a spindle shape by its own elasticity even if a certain amount of mucus adheres. The waist strength of such a cage 4 is determined by the section modulus Z of the elastic wire 3. However, the wire diameter as d, is Z = πd 3/32.
【００１８】これまで用いられている単線の直径は、
０．１５ｍｍ〜０．３ｍｍなので、それを基準とする
と、 0.3307×10-3≦Ｚ≦2.646 ×10-3 … である。The diameter of a single wire used so far is
Since it is 0.15 mm to 0.3 mm, based on this, it is 0.3307 × 10 −3 ≦ Z ≦ 2.646 × 10 −3 .
【００１９】そこで、図４に断面が示されるような３本
撚りの撚り線と、図５に断面が示されるような７本撚り
の撚り線の場合について、断面係数Ｚの大きさを計算し
て検討した。ただし、素線の断面係数をｚとすると、３
本撚りの撚り線はＺ＝３ｚであり、７本撚りの撚り線は
Ｚ＝７ｚである。Therefore, the magnitude of the section modulus Z was calculated for a three-stranded stranded wire whose cross section is shown in FIG. 4 and a seven-stranded stranded wire whose cross section is shown in FIG. Examined. However, assuming that the section modulus of the strand is z, 3
The twisted twisted wire has Z = 3z, and the twisted twisted wire has 7 = 7z.
【００２０】その結果、素線の直径と撚り線の断面係数
との関係を表した図６に示されるように、３本撚りの場
合には、素線径が０．１１ｍｍ〜０．２ｍｍの範囲にお
いて上記の範囲に入り、７本撚りの場合には、素線径
が０．０８ｍｍ〜０．１５ｍｍの範囲において上記の
範囲に入って、直径が０．１５ｍｍ〜０．３ｍｍの範囲
の単線と同程度の腰の強さを確保することができる。As a result, as shown in FIG. 6 showing the relationship between the diameter of the strand and the section modulus of the strand, in the case of three strands, the strand diameter is 0.11 mm to 0.2 mm. Within the above range, in the case of 7 strands, a single wire having a strand diameter of 0.08 mm to 0.15 mm, falling within the above range, and a diameter of 0.15 mm to 0.3 mm The same level of waist strength can be secured.
【００２１】なお、本発明は上記実施の形態に限定され
るものではなく、例えば、ケージ４を形成する弾性ワイ
ヤ３の数は、３本以上の複数なら何本でもよい。ただ
し、余り本数が多くなると異物を内部に取り込むための
隙間が狭くなるので、６本程度までが良好な実用範囲で
あり、８本程度を上限とするとよい。The present invention is not limited to the above-described embodiment. For example, the number of elastic wires 3 forming the cage 4 may be any number as long as it is three or more. However, if the number is too large, the gap for taking in the foreign matter becomes narrow. Therefore, the practical range is up to about 6 and the upper limit is about 8.
【００２２】[0022]
【発明の効果】本発明によれば、ケージを形成する複数
の弾性ワイヤとして、複数の素線を撚り合わせた撚り線
を用いたことにより、使用による弾性ワイヤの疲労が単
線に比べるとはるかに小さくて耐久性がある。According to the present invention, by using a stranded wire in which a plurality of strands are twisted as a plurality of elastic wires forming a cage, the fatigue of the elastic wire due to use is far greater than that of a single wire. Small and durable.
【００２３】また、撚り線が疲労したときは、まず撚り
線の素線の中の一本が切れるので、弾性ワイヤが完全に
切断する前にその切断を目視して廃棄等適切な処理をと
ることができ、安全性が確保される。When the stranded wire becomes fatigued, one of the strands of the stranded wire is cut first, so that the elastic wire is visually inspected for cutting before complete cutting, and appropriate treatment such as disposal is taken. Safety can be ensured.
【００２４】そして、弾性ワイヤの断面係数Ｚが、0.33
07×10-3≦Ｚ≦2.646 ×10-3の範囲にあるように撚り線
の素線径を選択すれば、良好な腰の強さを得ることがで
きるので、粘液等が付着してもケージが自己の弾性で膨
らんで異物等を捕獲することができる。Then, the section modulus Z of the elastic wire is 0.33
If the strand diameter of the stranded wire is selected so as to be in the range of 07 × 10 −3 ≦ Z ≦ 2.646 × 10 −3 , good stiffness can be obtained. The cage expands due to its own elasticity and can capture foreign matter and the like.
【図１】本発明の実施の形態の内視鏡用ドルミア型異物
摘出具の先端部分のケージが膨らんだ状態の側面断面図
である。FIG. 1 is a side cross-sectional view showing a state in which a cage at a distal end portion of a dormia-type foreign matter extracting tool for an endoscope according to an embodiment of the present invention is expanded.
【図２】本発明の実施の形態の内視鏡用ドルミア型異物
摘出具の先端部分のケージが膨らんだ状態の正面図であ
る。FIG. 2 is a front view showing a state in which a cage at a distal end portion of the dormia-type foreign matter extracting tool for an endoscope according to the embodiment of the present invention is expanded.
【図３】本発明の実施の形態の内視鏡用ドルミア型異物
摘出具の先端部分のケージがシース中ですぼまった状態
の側面断面図である。FIG. 3 is a side cross-sectional view showing a state in which a cage at a distal end portion of the dormia-type foreign matter extractor for an endoscope according to the embodiment of the present invention is squeezed in a sheath.
【図４】本発明の実施の形態の３本撚りの撚り線の断面
図である。FIG. 4 is a cross-sectional view of a three-stranded wire according to the embodiment of the present invention.
【図５】本発明の実施の形態の７本撚りの撚り線の断面
図である。FIG. 5 is a sectional view of a seven-stranded wire according to the embodiment of the present invention.
【図６】本発明の実施の形態の弾性ワイヤを形成する撚
り線の素線径と断面係数との関係を示す線図である。FIG. 6 is a diagram showing a relationship between a strand diameter and a section modulus of a stranded wire forming an elastic wire according to an embodiment of the present invention.
１ シース ２ 操作ワイヤ ３ 弾性ワイヤ ４ ケージ DESCRIPTION OF SYMBOLS 1 Sheath 2 Operation wire 3 Elastic wire 4 Cage
Claims (4)
両端を結束して全体を螺旋状に捩じって紡錘形に形成さ
れたケージを、可撓性のあるシース中に進退自在に挿通
された操作ワイヤの先端に連結して、上記操作ワイヤを
基端側から牽引すると上記ケージが上記シース中に引き
込まれてすぼまり、上記操作ワイヤを押して上記ケージ
を上記シース中から押し出すと、上記弾性ワイヤの弾性
力によって上記ケージが紡錘形に膨らむようにした内視
鏡用ドルミア型異物摘出具において、 上記弾性ワイヤとして、複数の素線を撚り合わせた撚り
線を用いたことを特徴とする内視鏡用ドルミア型異物摘
出具。A cage formed into a spindle shape by bundling the front and rear ends of at least three elastic wires and spirally twisting the whole is inserted into a flexible sheath so as to be able to advance and retreat freely. When connected to the distal end of the operating wire, and pulling the operating wire from the proximal end side, the cage is pulled into the sheath and contracts, and when the operating wire is pushed to push the cage out of the sheath, In a dormia-type foreign matter extractor for an endoscope in which the cage expands in a spindle shape by the elastic force of an elastic wire, a stranded wire obtained by twisting a plurality of strands is used as the elastic wire. Dormia-type foreign body extractor for endoscopes.
10-3≦Ｚ≦2.646 ×10-3の範囲にある請求項１記載の内
視鏡用ドルミア型異物摘出具。2. A sectional modulus Z of the elastic wire is 0.3307 ×
2. The dormia-type foreign matter extractor for an endoscope according to claim 1, wherein the inequality is in the range of 10 −3 ≦ Z ≦ 2.646 × 10 −3 .
０．２０ｍｍの範囲の素線を３本撚り合わせて形成され
ている請求項２記載の内視鏡用ドルミア型異物摘出具。3. The method according to claim 1, wherein the elastic wire has a diameter of 0.11 mm or more.
3. The dormia-type foreign matter extractor for an endoscope according to claim 2, wherein three strands having a diameter of 0.20 mm are twisted together.
０．１５ｍｍの範囲の素線を７本撚り合わせて形成され
ている請求項２記載の内視鏡用ドルミア型異物摘出具。4. The method according to claim 1, wherein the elastic wire has a diameter of 0.08 mm or more.
3. The dormia-type foreign matter extractor for an endoscope according to claim 2, wherein seven strands having a diameter of 0.15 mm are twisted together.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP541997A JPH10192296A (en) | 1997-01-16 | 1997-01-16 | Dormia-type foreign matter remover for endoscope |
| DK5198A DK5198A (en) | 1997-01-16 | 1998-01-15 | Endoscopic Dormia foreign body extractor |
| DE1998101520 DE19801520A1 (en) | 1997-01-16 | 1998-01-16 | Endoscopic Dormi foreign body extractor |
| GB9800971A GB2321192A (en) | 1997-01-16 | 1998-01-16 | Endoscopic Dormian foreign body extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP541997A JPH10192296A (en) | 1997-01-16 | 1997-01-16 | Dormia-type foreign matter remover for endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10192296A true JPH10192296A (en) | 1998-07-28 |
Family
ID=11610647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP541997A Pending JPH10192296A (en) | 1997-01-16 | 1997-01-16 | Dormia-type foreign matter remover for endoscope |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH10192296A (en) |
| DE (1) | DE19801520A1 (en) |
| DK (1) | DK5198A (en) |
| GB (1) | GB2321192A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10349962B2 (en) | 2016-02-17 | 2019-07-16 | Olympus Corporation | Endoscope treatment tool |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002083009A1 (en) | 2001-04-12 | 2002-10-24 | Olympus Optical Co., Ltd. | Treatment tool for endoscope |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE110553T1 (en) * | 1989-04-05 | 1994-09-15 | Gip Medizin Technik Gmbh | LITHOTRIPTOR. |
| DE69631121T2 (en) * | 1995-02-02 | 2004-08-19 | Boston Scientific Corp., Natick | SURGICAL EXTRACTOR WITH A WIRE BASKET |
-
1997
- 1997-01-16 JP JP541997A patent/JPH10192296A/en active Pending
-
1998
- 1998-01-15 DK DK5198A patent/DK5198A/en not_active Application Discontinuation
- 1998-01-16 DE DE1998101520 patent/DE19801520A1/en not_active Withdrawn
- 1998-01-16 GB GB9800971A patent/GB2321192A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10349962B2 (en) | 2016-02-17 | 2019-07-16 | Olympus Corporation | Endoscope treatment tool |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19801520A1 (en) | 1998-07-23 |
| GB9800971D0 (en) | 1998-03-11 |
| DK5198A (en) | 1998-07-17 |
| GB2321192A (en) | 1998-07-22 |
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