JP4502490B2 - Endoscope forceps plug - Google Patents

Endoscope forceps plug Download PDF

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Publication number
JP4502490B2
JP4502490B2 JP2000296048A JP2000296048A JP4502490B2 JP 4502490 B2 JP4502490 B2 JP 4502490B2 JP 2000296048 A JP2000296048 A JP 2000296048A JP 2000296048 A JP2000296048 A JP 2000296048A JP 4502490 B2 JP4502490 B2 JP 4502490B2
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Japan
Prior art keywords
treatment instrument
membrane
closing
insertion channel
slit
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Expired - Fee Related
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JP2000296048A
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Japanese (ja)
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JP2002102156A (en
Inventor
輝雄 大内
智志 木戸岡
裕之 高瀬
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Hoya Corp
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Hoya Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00131Accessories for endoscopes
    • A61B1/00137End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
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  • Endoscopes (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、内視鏡の処置具挿通チャンネルの入口に配置される内視鏡の鉗子栓に関する。
【0002】
【従来の技術】
内視鏡の鉗子栓は、処置具が使用されない通常の状態において、処置具挿通チャンネルを経由して体内汚液等が噴出しないように処置具挿通チャンネルの入口部分をシールし、処置具挿通チャンネルに処置具を挿脱する際には、入口を開閉するための操作を必要とせず、処置具挿脱により体内汚液等が噴出しないようシールするものでなければならない。
【0003】
そこで、従来の内視鏡の鉗子栓として最もシンプルな構成は、−状のスリットが形成されたゴム製の閉鎖膜を、処置具挿通チャンネルの入口部分に配置したものである。
【0004】
また、閉鎖膜を二重に重ね合わせたり(実開昭61−54801号)、−状のスリットが形成された第1の閉鎖膜を入口側に配置して、その奥に丸穴が形成された第2の閉鎖膜を配置したもの(米国特許第4809679号)等がある。
【0005】
【発明が解決しようとする課題】
しかし、−状のスリットが形成された閉鎖膜だけが設けられた鉗子栓は、処置具が処置具挿通チャンネルから抜き出される際に、処置具の先端部分がスリットから外れる瞬間のスリットが閉じきるまでの時間遅れの間に、体内汚液が噴出してしまう。
【0006】
また、閉鎖膜を二重に重ね合わせたものも、処置具が処置具挿通チャンネルから抜き出される際に体内汚液が噴出してしまう点では大差がなく、上述の米国特許第4809679号に示されるものも、入口側の−状のスリットが形成された閉鎖膜から処置具の先端が抜け出す際に同じ現象が発生する。
【0007】
また、図6に示されるように、最も一般的な内視鏡用処置具である生検鉗子50には、先端近傍にリンク機構51を挟持するためのスリ割り52が形成されているため、スリ割り52部分が閉鎖膜90を通過する際には、矢印Aで示されるように、スリ割り52を通って体内汚液が噴出する場合がある。
【0008】
そこで本発明は、処置具を抜き出す際のシール性がよく、生検鉗子等を挿脱する際にも体内汚液が漏れ難い内視鏡の鉗子栓を提供することを目的とする。
【0009】
【課題を解決するための手段】
上記の目的を達成するため、本発明の内視鏡の鉗子栓は、内視鏡の処置具挿通チャンネルの入口部分に、通常は自己の弾性により閉じた状態を維持してそこを通過する処置具により弾力的に押し開かれる第1の閉鎖膜と、通過する処置具の外面に密着してそこをシールをする第2の閉鎖膜とを、第2の閉鎖膜を入口側にして両閉鎖膜の間を処置具挿通チャンネルの直径の2.5倍以上離して配置したものである。
【0010】
なお、第1の閉鎖膜の処置具通過部に−状のスリットが形成され、第2の閉鎖膜の処置具通過部に−状のスリット又は丸穴が形成されていると良好なシール性が得られる。
【0011】
【発明の実施の形態】
図面を参照して本発明の実施例を説明する。
図2は内視鏡を示しており、可撓管によって外装された挿入部1の基端が操作部2の下端に連結されている。
【0012】
挿入部1内に挿通配置された処置具挿通チャンネル3の先端は挿入部1の先端において外部に開口し、処置具挿通チャンネル3の入口に配置された鉗子栓10が、操作部2の下端部分から斜め上方に突出している。
【0013】
図1に示されるように、鉗子栓10は、処置具挿通チャンネル3の入口端部に設けられた入口口金30に着脱自在に取り付けられており、弾力性のあるゴム材等によって形成された下半筒体11に、同様の材質からなる上半筒体12を着脱自在に取り付けて構成されている。
【0014】
下半筒体11は、その下端内面から内方に突設された弾性突起部13が入口口金30の口元近傍に形成された円周溝部32に嵌め込まれており、弾性突起部13の周辺を弾性変形させて円周溝部32に係脱させることにより、下半筒体11を入口口金30に対して着脱することができる。
【0015】
下半筒体11には、中心にスリット15が形成された第1の閉鎖膜14が、入口口金30の開口端に面して形成されている。スリット15は、処置具が使用されない通常の状態においては閉鎖膜14の弾力性によって閉じた状態を維持しており、処置具挿通チャンネル3内と外部との間がシールされている。そして、処置具挿通チャンネル3に挿脱される処置具によってスリット15が弾力的に押し開かれる。
【0016】
上半筒体12は、下半筒体11の開口部に外方から着脱自在に嵌め込まれ、上半筒体12の嵌め込まれる部分の先端に突設された鍔部24が、下半筒体11の開口部の内周に形成された段部17に係脱自在に構成されている。
【0017】
そして、上半筒体12側を弾力的に変形させて鍔部24を段部17に係合させれば、上半筒体12が下半筒体11の開口部に係止された状態になり、鍔部24を弾性変形させて段部17から外すことにより、上半筒体12を下半筒体11の開口部から外すことができる。
【0018】
上半筒体12の表面部分は第2の閉鎖膜26になっていて、その中央に丸穴27が形成されている。ただし、丸穴27に代えて−状のスリットを形成してもよい。
【0019】
処置具挿通チャンネル3内に挿脱される処置具が丸穴27を通過する際には、丸穴27が処置具により弾力的に押し広げられて処置具の外周面に密着し、処置具挿通チャンネル3内と外部との間が第2の閉鎖膜26によってシールされた状態になる。
【0020】
第1の閉鎖膜14と第2の閉鎖膜26は、第2の閉鎖膜26を入口側にして処置具挿通チャンネル3の直径(内径)Dの2.5倍以上の間隔L(L≧2.5D)をあけて配置されている。
【0021】
ただし、両閉鎖膜14,26の間の間隔Lが離れ過ぎると処置具の挿入操作性が低下するので、L≦10Dの範囲であることが望ましい。処置具挿通チャンネル3の直径Dは例えば2〜3mm程度である。
【0022】
図3は、チューブ状の内視鏡用処置具40が処置具挿通チャンネル3から抜き出される際に、そのチューブ状処置具40の先端が第1の閉鎖膜14のスリット15から外れる瞬間の状態を示しており、第2の閉鎖膜26の丸穴27部分がチューブ状処置具40のシース外周面に密着しているので、第2の閉鎖膜14のスリット15に閉じ遅れがあっても体内汚液は噴出しない。
【0023】
そして、チューブ状処置具40の先端が第2の閉鎖膜26の丸穴27から外れる際には、第1の閉鎖膜14のスリット15が閉じた図1に示される状態になるので、処置具挿通チャンネル3から体内汚液が噴出しない。
【0024】
図4は、生検鉗子50が処置具挿通チャンネル3から抜き出される際に、生検鉗子50の先端が第1の閉鎖膜14のスリット15から外れる瞬間の状態を示している。
【0025】
前述のように第1の閉鎖膜14と第2の閉鎖膜26が処置具挿通チャンネル3の直径(内径)Dの2.5倍以上の間隔Lをあけて配置されているので、生検鉗子50のリンク機構51が挟持されたスリ割り52部分は第2の閉鎖膜26に到達していない。
【0026】
その結果、第2の閉鎖膜26の丸穴27部分が生検鉗子50の円筒状部分の外周面に密着しているので、丸穴27部分からの漏れが発生せず、第2の閉鎖膜14のスリット15に閉じ遅れがあっても体内汚液が噴出しない。
【0027】
また、生検鉗子50のスリ割り52部分が第2の閉鎖膜26の丸穴27を通過する際には、図5に示されるように、すでに第1の閉鎖膜14のスリット15が閉じているので、その他の処置具を抜き出す場合と同様に体内汚液が噴出しない。
【0028】
このように本発明においては、一般に生検鉗子50の先端からスリ割り52の後端までの長さが処置具挿通チャンネル3の直径Dの2.5倍未満になっていることを利用して、シール性が悪くなる生検鉗子技法の場合等でも体内汚液が噴出し難くなり、衛生的に内視鏡検査を行うことができる。
【0029】
【発明の効果】
本発明によれば、二つの閉鎖膜のうち内側に配置された第1の閉鎖膜を処置具の先端が通過する際には、入口側の第2の閉鎖膜が処置具の外面に密着してそこをシールしており、処置具の先端が第2の閉鎖膜を通過する際には第1の閉鎖膜が閉じている。そして、第1と第2の閉鎖膜が処置具挿通チャンネルの直径の2.5倍以上離して配置されていることから、生検鉗子等のように先端部分にスリ割り等が形成された処置具が通過する際であっても、上述と同様に確実なシールが行われて、体内汚液の噴出が発生しない。
【図面の簡単な説明】
【図1】本発明の実施例の内視鏡の鉗子栓の縦断面図である。
【図2】本発明の実施例の内視鏡の全体構成を示す外観図である。
【図3】本発明の実施例の内視鏡の鉗子栓からチューブ状処置具が引き出される状態の縦断面図である。
【図4】本発明の実施例の内視鏡の鉗子栓から生検鉗子が引き出される状態の縦断面図である。
【図5】本発明の実施例の内視鏡の鉗子栓から生検鉗子が引き出される状態の縦断面図である。
【図6】従来の内視鏡の鉗子栓から生検鉗子が引き出される状態の縦断面図である。
【符号の説明】
3 処置具挿通チャンネル
10 鉗子栓
14 第1の閉鎖膜
15 スリット
26 第2の閉鎖膜
27 丸穴
40 チューブ状処置具
50 生検鉗子
52 スリ割り
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscopic forceps plug disposed at an entrance of a treatment instrument insertion channel of an endoscope.
[0002]
[Prior art]
The forceps plug of the endoscope seals the entrance portion of the treatment instrument insertion channel so that the infiltrate in the body does not eject through the treatment instrument insertion channel in a normal state where the treatment instrument is not used. When inserting / removing the treatment tool, the operation for opening / closing the entrance is not required, and it is necessary to seal so that the in-vivo sewage or the like is not ejected by the insertion / removal of the treatment tool.
[0003]
Therefore, the simplest configuration as a forceps plug of a conventional endoscope is a rubber closure membrane having a negative slit formed at the entrance of the treatment instrument insertion channel.
[0004]
In addition, the closure membranes are double stacked (Japanese Utility Model Publication No. 61-54801), or the first closure membrane having a -shaped slit is arranged on the inlet side, and a round hole is formed in the back. In addition, there is one in which a second closing membrane is disposed (US Pat. No. 4,809,679).
[0005]
[Problems to be solved by the invention]
However, the forceps plug provided with only the closing membrane in which the −-shaped slit is formed can completely close the slit when the distal end portion of the treatment instrument is detached from the slit when the treatment instrument is pulled out from the treatment instrument insertion channel. During the time delay until the end, the internal sap will erupt.
[0006]
In addition, the double overlapped closure membranes are not so different in that the in-vivo effluent is ejected when the treatment instrument is extracted from the treatment instrument insertion channel, as shown in the above-mentioned US Pat. No. 4,809,679. The same phenomenon occurs when the distal end of the treatment instrument comes out of the closing membrane in which the entrance-shaped slit is formed.
[0007]
Further, as shown in FIG. 6, the biopsy forceps 50, which is the most common endoscopic treatment instrument, is formed with a slit 52 for holding the link mechanism 51 in the vicinity of the distal end. When the slit 52 part passes through the closing membrane 90, as shown by the arrow A, the body sewage may be ejected through the slit 52.
[0008]
Therefore, an object of the present invention is to provide a forceps plug of an endoscope that has good sealing properties when extracting a treatment tool and that hardly leaks in-vivo sewage even when a biopsy forceps or the like is inserted and removed.
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, the forceps plug of the endoscope of the present invention is a treatment that passes through the entrance portion of the treatment instrument insertion channel of the endoscope, which is normally kept closed by its own elasticity. Both the first closing membrane that is elastically pushed open by the instrument and the second closing membrane that is in close contact with and seals the outer surface of the treatment instrument that passes therethrough, with the second closing membrane as the inlet side. The membranes are arranged at a distance of 2.5 times or more the diameter of the treatment instrument insertion channel.
[0010]
In addition, when a-shaped slit is formed in the treatment instrument passage part of the first closure membrane and a-shaped slit or a round hole is formed in the treatment instrument passage part of the second closure membrane, a good sealing property is obtained. can get.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows an endoscope, and the proximal end of the insertion portion 1 covered with a flexible tube is connected to the lower end of the operation portion 2.
[0012]
The distal end of the treatment instrument insertion channel 3 disposed in the insertion section 1 opens to the outside at the distal end of the insertion section 1, and the forceps plug 10 disposed at the inlet of the treatment instrument insertion channel 3 is connected to the lower end portion of the operation section 2. Projecting diagonally upward.
[0013]
As shown in FIG. 1, the forceps plug 10 is detachably attached to an inlet base 30 provided at the inlet end of the treatment instrument insertion channel 3 and is formed of a resilient rubber material or the like. An upper half cylinder 12 made of the same material is detachably attached to the half cylinder 11.
[0014]
The lower half cylinder 11 has an elastic protrusion 13 projecting inwardly from the inner surface of the lower end thereof and is fitted into a circumferential groove 32 formed in the vicinity of the mouth of the inlet base 30, and around the elastic protrusion 13. The lower half cylinder 11 can be attached to and detached from the inlet base 30 by being elastically deformed and being engaged with and disengaged from the circumferential groove portion 32.
[0015]
In the lower half cylinder 11, a first closing film 14 having a slit 15 formed in the center is formed facing the opening end of the inlet base 30. The slit 15 maintains a closed state by the elasticity of the closing film 14 in a normal state where the treatment tool is not used, and the space between the inside of the treatment tool insertion channel 3 and the outside is sealed. Then, the slit 15 is elastically pushed open by the treatment instrument inserted into and removed from the treatment instrument insertion channel 3.
[0016]
The upper half cylinder 12 is detachably fitted into the opening of the lower half cylinder 11 from the outside, and a flange 24 projecting from the tip of the portion into which the upper half cylinder 12 is fitted is provided in the lower half cylinder. 11 is configured to be detachable from a stepped portion 17 formed on the inner periphery of the opening.
[0017]
Then, if the upper half cylinder 12 side is elastically deformed and the collar portion 24 is engaged with the step portion 17, the upper half cylinder 12 is locked in the opening of the lower half cylinder 11. Thus, the upper half cylinder 12 can be removed from the opening of the lower half cylinder 11 by elastically deforming the collar part 24 and removing it from the step part 17.
[0018]
A surface portion of the upper half cylinder 12 is a second closing film 26, and a round hole 27 is formed at the center thereof. However, a negative slit may be formed instead of the round hole 27.
[0019]
When the treatment instrument inserted into and removed from the treatment instrument insertion channel 3 passes through the round hole 27, the round hole 27 is elastically pushed and expanded by the treatment instrument to closely contact the outer peripheral surface of the treatment instrument, and the treatment instrument is inserted. The inside of the channel 3 and the outside are sealed by the second closing film 26.
[0020]
The first closing membrane 14 and the second closing membrane 26 have an interval L (L ≧ 2) that is at least 2.5 times the diameter (inner diameter) D of the treatment instrument insertion channel 3 with the second closing membrane 26 as the inlet side. .5D).
[0021]
However, if the distance L between the two closing membranes 14 and 26 is too far, the insertion operability of the treatment tool is lowered, and therefore it is desirable that L ≦ 10D. The diameter D of the treatment instrument insertion channel 3 is, for example, about 2 to 3 mm.
[0022]
FIG. 3 shows a state at the moment when the distal end of the tubular treatment instrument 40 is detached from the slit 15 of the first closing film 14 when the tubular treatment instrument 40 is extracted from the treatment instrument insertion channel 3. Since the round hole 27 portion of the second closure membrane 26 is in close contact with the outer peripheral surface of the sheath of the tubular treatment instrument 40, the body can be detected even if the slit 15 of the second closure membrane 14 is delayed. The sewage does not spout.
[0023]
And when the front-end | tip of the tube-shaped treatment tool 40 remove | deviates from the round hole 27 of the 2nd closure film | membrane 26, since it will be in the state shown by FIG. 1 with which the slit 15 of the 1st closure film | membrane 14 was closed, it is a treatment tool. The body sewage does not spout from the insertion channel 3.
[0024]
FIG. 4 shows a state at the moment when the tip of the biopsy forceps 50 is detached from the slit 15 of the first closing film 14 when the biopsy forceps 50 is extracted from the treatment instrument insertion channel 3.
[0025]
As described above, since the first closing membrane 14 and the second closing membrane 26 are arranged with an interval L of 2.5 times or more the diameter (inner diameter) D of the treatment instrument insertion channel 3, the biopsy forceps The slot 52 portion where 50 link mechanisms 51 are sandwiched does not reach the second closing membrane 26.
[0026]
As a result, since the round hole 27 portion of the second closing membrane 26 is in close contact with the outer peripheral surface of the cylindrical portion of the biopsy forceps 50, no leakage from the round hole 27 portion occurs, and the second closing membrane Even if there is a delay in closing the 14 slits 15, the internal sap does not spout.
[0027]
When the slit 52 portion of the biopsy forceps 50 passes through the round hole 27 of the second closing membrane 26, the slit 15 of the first closing membrane 14 is already closed as shown in FIG. Therefore, as in the case of extracting other treatment tools, the internal sewage does not spout.
[0028]
As described above, in the present invention, the length from the distal end of the biopsy forceps 50 to the rear end of the slit 52 is generally less than 2.5 times the diameter D of the treatment instrument insertion channel 3. Even in the case of biopsy forceps technique in which the sealing performance is poor, it becomes difficult for the internal sewage to be ejected, and the endoscopic examination can be performed hygienically.
[0029]
【The invention's effect】
According to the present invention, when the distal end of the treatment instrument passes through the first closure membrane disposed on the inner side of the two closure membranes, the second closure membrane on the inlet side is in close contact with the outer surface of the treatment instrument. The first closure membrane is closed when the distal end of the treatment instrument passes through the second closure membrane. Since the first and second closure membranes are arranged at a distance of 2.5 times or more the diameter of the treatment instrument insertion channel, a treatment in which a slit or the like is formed at the distal end portion like a biopsy forceps or the like Even when the device passes, reliable sealing is performed in the same manner as described above, and no in-vivo squirt is ejected.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a forceps plug of an endoscope according to an embodiment of the present invention.
FIG. 2 is an external view showing an overall configuration of an endoscope according to an embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a state where the tubular treatment tool is pulled out from the forceps plug of the endoscope according to the embodiment of the present invention.
FIG. 4 is a longitudinal sectional view showing a state in which the biopsy forceps are pulled out from the forceps plug of the endoscope according to the embodiment of the present invention.
FIG. 5 is a longitudinal sectional view showing a state in which the biopsy forceps are pulled out from the forceps plug of the endoscope according to the embodiment of the present invention.
FIG. 6 is a longitudinal sectional view showing a state in which a biopsy forceps is pulled out from a forceps plug of a conventional endoscope.
[Explanation of symbols]
3 treatment instrument insertion channel 10 forceps plug 14 first closing membrane 15 slit 26 second closing membrane 27 round hole 40 tubular treatment tool 50 biopsy forceps 52 slit

Claims (2)

内視鏡の処置具挿通チャンネルの入口部分に、通常は自己の弾性により閉じた状態を維持してそこを通過する処置具により弾力的に押し開かれる第1の閉鎖膜と、通過する処置具の外面に密着してそこをシールをする第2の閉鎖膜とを、上記第2の閉鎖膜を入口側にして上記両閉鎖膜の間を上記処置具挿通チャンネルの入口部の直径の2.5倍以上離して配置したことを特徴とする内視鏡の鉗子栓。A first closing membrane that is elastically pushed open by a treatment instrument that normally passes through the entrance portion of the treatment instrument insertion channel of the endoscope while maintaining its closed state by its own elasticity, and a treatment instrument that passes therethrough 2. A second closing membrane that adheres to and seals the outer surface of the treatment device , and the diameter of the inlet portion of the treatment instrument insertion channel between the two closing membranes with the second closing membrane as the inlet side. An endoscopic forceps plug, which is arranged 5 times or more apart. 上記第1の閉鎖膜の処置具通過部には−状のスリットが形成され、上記第2の閉鎖膜の処置具通過部には−状のスリット又は丸穴が形成されている請求項1記載の内視鏡の鉗子栓。The-shaped slit is formed in the treatment instrument passage part of the first closure membrane, and the-shaped slit or a round hole is formed in the treatment instrument passage part of the second closure membrane. Endoscopic forceps plug.
JP2000296048A 2000-09-28 2000-09-28 Endoscope forceps plug Expired - Fee Related JP4502490B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574270A1 (en) 2011-09-27 2013-04-03 Fujifilm Corporation Closure device for end opening and endoscope

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02136603U (en) * 1989-04-19 1990-11-14
JPH03111025A (en) * 1989-09-26 1991-05-10 Olympus Optical Co Ltd Forceps plug for endoscope
JPH10155735A (en) * 1996-11-28 1998-06-16 Fuji Photo Optical Co Ltd Forceps cock for endoscope

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02136603U (en) * 1989-04-19 1990-11-14
JPH03111025A (en) * 1989-09-26 1991-05-10 Olympus Optical Co Ltd Forceps plug for endoscope
JPH10155735A (en) * 1996-11-28 1998-06-16 Fuji Photo Optical Co Ltd Forceps cock for endoscope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574270A1 (en) 2011-09-27 2013-04-03 Fujifilm Corporation Closure device for end opening and endoscope

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