JP2001340465A - Catheter for endoscope - Google Patents

Catheter for endoscope

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Publication number
JP2001340465A
JP2001340465A JP2000159795A JP2000159795A JP2001340465A JP 2001340465 A JP2001340465 A JP 2001340465A JP 2000159795 A JP2000159795 A JP 2000159795A JP 2000159795 A JP2000159795 A JP 2000159795A JP 2001340465 A JP2001340465 A JP 2001340465A
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Prior art keywords
flexible tube
endoscope
diameter
catheter
outer diameter
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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
Application number
JP2000159795A
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Japanese (ja)
Inventor
Teruo Ouchi
輝雄 大内
Original Assignee
Asahi Optical Co Ltd
旭光学工業株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a catheter for an endoscope which can be used even after coil breaks and which can be used repeatedly and hygienically for a long term without inserting and arranging a core metal. SOLUTION: A catheter for an endoscope has a flexible tube 1 made of a fluororesin which is inserted into and detached from an insertion channel of a processing tool for an endoscope. Rate t/D of wall thickness(t) against outer diameter (a diameter) dimension D of the flexible tube 1 is set within the range of 0.2-0.277.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [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路に挿脱して使用される内視鏡用カテーテルに関する。 TECHNICAL FIELD The present invention relates to endoscopic catheters used in inserting and removing the biopsy channel of an endoscope.

【0002】 [0002]

【従来の技術】内視鏡用カテーテルとしては、内視鏡の処置具挿通路に挿脱される部分にフッ素樹脂製の可撓性チューブを用いたものが少なくない。 The catheter BACKGROUND ART endoscope, is not less that using the endoscope flexible tube biopsy channel made part fluororesin is inserted into and removed from the.

【0003】そのような内視鏡用カテーテルが挿脱される内視鏡の処置具挿通路の直径(内径)は、一般に2m [0003] Such endoscopic catheter for the biopsy channel of an endoscope to be inserted and removed in diameter (inner diameter) is generally 2m
mと2.8mmの二種類に標準化されており、そこに挿通される内視鏡用カテーテルのフッ素樹脂製可撓性チューブは次のようなものであった。 The two types of m and 2.8mm are standardized, the endoscope catheter fluororesin flexible tube to be inserted therein were as follows. 但し、内径をd、外径をD、肉厚をtとする。 However, the inner diameter d, an outer diameter D, and wall thickness and t.

【0004】 〔直径2mmの処置具挿通路用〕 い)d:1mm D:1.65mm t:0.325mm ろ)d:1.2mm D:1.8mm t:0.3mm 〔直径2.8mmの処置具挿通路用〕 は)d:1.5mm D:2.1mm t:0.3mm に)d:1.5mm D:2.3mm t:0.4mm [0004] There [biopsy channel for 2mm diameter]) d: 1mm D: 1.65mm t: 0.325mm filtrate) d: 1.2mm D: 1.8mm t: 0.3mm [diameter 2.8mm for biopsy channel] is) d: 1.5mm D: 2.1mm t: 0.3mm to) d: 1.5mm D: 2.3mm t: 0.4mm

【0005】図6に示されるように、上記のような可撓性チューブ1はいずれも、内視鏡の処置具挿通路10に挿入していくにしたがって増大する通過抵抗によって、 [0005] As shown in FIG. 6, both the flexible tube 1 as described above, by the passage resistance increases with gradually inserted into the biopsy channel 10 of the endoscope,
手元の部分で腰折れしてしまう場合が少なくない。 If the result in buckling at hand parts are not a few.

【0006】そして、上記のような寸法設定のフッ素樹脂製可撓性チューブ1は、腰折れすると、図7に示されるように、その部分が座屈して関節状の折れ癖が付いてしまい、以後の使用が実質上できなくなってしまう。 [0006] Then, fluororesin flexible tube 1 of the dimensioning described above, when buckling, as shown in FIG. 7, it will be attached is articulated a folded habit portion thereof is buckled, thereafter use of becomes impossible on the real.

【0007】そこで従来の内視鏡用カテーテルにおいては、可撓性チューブ内に芯金を通したり、薄い金属条からなる螺旋環を内周面に沿って配置する等して、腰折れ防止を図っていた。 [0007] Therefore, in the conventional endoscopic catheters, and the like arranged or through the metal core into the flexible tube, along the inner circumferential surface of the helical ring of thin metal strip, working to buckling prevention which was.

【0008】 [0008]

【発明が解決しようとする課題】しかし、可撓性チューブ内に芯金を通したり、薄い金属条からなる螺旋環を内周面に沿って配置すると、可撓性チューブ内の通路断面積が狭くなってしまうだけでなく、いったん腰折れすると、内部の芯金や螺旋環に曲がり癖が付いてしまうために使用不能になったり、付着した汚物を完全に洗浄するのが難しい等の問題を有している。 [SUMMARY OF THE INVENTION] However, if passed through the metal core into the flexible tube, when disposed along the inner circumferential surface of the helical ring of thin metal strip, a passage sectional area of ​​the flexible tube not only it is narrowed, once closed when stall, or unavailable to become with a bending tendency to the inside of the metal core and a helical ring, a problem of difficulty or the like to completely wash the adhering filth are doing.

【0009】そこで本発明は、腰折れしても使用不能にならず、芯金等を挿入配置することなく長期間にわたって繰り返して衛生的に使用することができる内視鏡用カテーテルを提供することを目的とする。 [0009] The present invention is not to be unavailable to stall, to provide an endoscopic catheter that can be hygienically used repeatedly over a long period of time without inserting placing the core metal and the like for the purpose.

【0010】 [0010]

【課題を解決するための手段】上記の目的を達成するため、本発明の内視鏡用カテーテルは、内視鏡の処置具挿通路に挿脱されるフッ素樹脂製の可撓性チューブを有する内視鏡用カテーテルにおいて、可撓性チューブの外径(直径)寸法に対する肉厚の比を、0.2〜0.277 Means for Solving the Problems] To achieve the above object, an endoscope catheter of the present invention, a fluorine resin of the flexible tube to be inserted into and removed from the biopsy channel of an endoscope in endoscopic catheters, the ratio of wall thickness to the outer diameter (diameter) dimension of the flexible tube, 0.2 to 0.277
の範囲にしたものである。 It is those that were in the range of.

【0011】なお、可撓性チューブの外径(直径)が略1.8mmであるのに対して、その肉厚が略0.4〜 [0011] Incidentally, while the outer diameter of the flexible tube (diameter) is approximately 1.8 mm, the wall thickness of approximately 0.4
0.5mmの範囲にあるとよく、可撓性チューブの外径(直径)が略2.3〜2.5mmの範囲にあるのに対して、その肉厚が略0.5〜0.6mmであるとよい。 In the range of 0.5mm the well, while the outer diameter of the flexible tube (diameter) in the range of approximately 2.3~2.5Mm, its thickness is substantially 0.5~0.6mm it may be.

【0012】 [0012]

【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。 DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the drawings illustrating the embodiment of the present invention. 図3は、最も単純な構造の内視鏡用カテーテルの一例を示しており、四フッ化エチレン樹脂又は三フッ化エチレン樹脂等のフッ素樹脂製の可撓性チューブ1 Figure 3 shows an example of the endoscopic catheter simplest structure, the four flexible tubes 1 made of fluororesin such as polytetrafluoroethylene or ethylene trifluoride resin
が、注射針口金状に形成された基端口金2に接続されている。 There is connected to the proximal end cap 2 formed on the needle cap shape.

【0013】したがって、可撓性チューブ1を内視鏡の処置具挿通路に挿通して基端口金2に注射器等を接続し、薬液等を可撓性チューブ1の先端から体内に噴出させたり、或いは体内から液を吸引することができる。 [0013] Thus, the flexible tube 1 is inserted into the biopsy channel of an endoscope connected to a syringe or the like to the proximal end cap 2, or a drug solution or the like from the distal end of the flexible tube 1 is ejected into the body , or it can be sucked liquid from the body.

【0014】前述のように、内視鏡用カテーテルが挿脱される内視鏡の処置具挿通路の直径(内径)は、一般に2mmと2.8mmの二種類に標準化されているが、そこに挿通される本発明の内視鏡用カテーテルの可撓性チューブ1は、図1に示されるように、外径(直径)寸法Dに対する肉厚tの比(t/D)が0.2〜0.277 [0014] As described above, the diameter of the endoscope biopsy channel of the catheter for an endoscope is inserted and removed (inside diameter) is generally are standardized into two types of 2mm and 2.8 mm, there flexible tube 1 of the endoscopic catheter of the present invention to be inserted is, as shown in Figure 1, the ratio of thickness t to the outer diameter (diameter) dimension D (t / D) is 0.2 ~0.277
の範囲になっている。 It has been in the range of.

【0015】具体的に例を示すと、次のような寸法である。 [0015] More specifically illustrating an example, it is dimensioned as follows. dは内径(直径)である。 d is an inner diameter (diameter). 〔直径2mmの処置具挿通路用〕 イ)d:1mm D:1.8mm t:0.4mm t/D=0.222 ロ)d:0.8mm D:1.8mm t:0.5mm t/D=0.277 [Biopsy channel for 2mm diameter] b) d: 1mm D: 1.8mm t: 0.4mm t / D = 0.222 b) d: 0.8mm D: 1.8mm t: 0.5mm t /D=0.277

【0016】 〔直径2.8mmの処置具挿通路用〕 ハ)d:1.3mm D:2.3mm t:0.5mm t/D=0.217 ニ)d:1.3mm D:2.5mm t:0.6mm t/D=0.24 ホ)d:1.5mm D:2.5mm t:0.5mm t/D=0.2 [0016] [a biopsy channel of diameter 2.8mm] c) d: 1.3mm D: 2.3mm t: 0.5mm t / D = 0.217 d) d: 1.3mm D: 2. 5mm t: 0.6mm t / D = 0.24 e) d: 1.5mm D: 2.5mm t: 0.5mm t / D = 0.2

【0017】可撓性チューブ1の外径(直径)寸法Dに対する肉厚tの比(t/D)が0.2以上あると、図2 [0017] The ratio of the wall thickness t to the outer diameter (diameter) dimension D of the flexible tube 1 (t / D) is 0.2 or more, 2
に示されるように、可撓性チューブ1は腰折れしても関節状に座屈した状態にはならず、軸線に対して垂直な断面の形状が潰れずに維持されるので、内視鏡用カテーテルが使用不能にならず繰り返して使用することができる。 As shown in, the flexible tube 1 is not in a state of buckling articulated also buckling, because it is maintained without collapse the shape of the cross section perpendicular to the axis, endoscopic catheter can be used repeatedly not disabled. これは、実験により確認されたものである。 This is what has been confirmed by experiment.

【0018】また、可撓性チューブ1の外径(直径)寸法Dに対する肉厚tの比(t/D)は無制限に大きくてよいわけではないので、実用上から、上記のイ)〜ホ) Further, since the ratio of the thickness t to the outer diameter (diameter) dimension D of the flexible tube 1 (t / D) is not be increased indefinitely, from a practical, the above a) to e )
の中の最大値であるt/D=0.277を上限とするとよい。 The t / D = 0.277 is the maximum value among or equal to the upper limit.

【0019】次に、図4に示されるように、50cmの長さの可撓性チューブ1の試験片を45°曲げるのに要する力Fの測定を行ったところ、図5に示される結果になった。 Next, as shown in FIG. 4 was measured for the force F required a test piece of a flexible tube 1 of a length of 50cm to bend 45 °, the results shown in FIG. 5 became. これにて実用上問題がない。 There is no practical problem in this.

【0020】なお、本発明は上記実施例に限定されるものではなく、図3に図示された構成以外の各種の内視鏡用カテーテルに適用することができる。 [0020] The present invention is not limited to the above embodiments can be applied to various endoscopic catheters other than the configuration illustrated in FIG.

【0021】 [0021]

【発明の効果】本発明によれば、可撓性チューブの外径(直径)寸法に対する肉厚の比を、0.2〜0.277 According to the present invention, the ratio of wall thickness to the outer diameter (diameter) dimension of the flexible tube, from 0.2 to 0.277
の範囲にしたことにより、可撓性チューブ1が腰折れしても、関節状に座屈した状態にはならないので使用不能にならず長期間にわたって繰り返し使用することができ、しかも、芯金等を挿入配置する必要がないので汚物等が内部に溜まり難く、内部に付着した汚物等は容易に洗浄除去して衛生的に使用することができる。 By the the range, even if the flexible tube 1 is buckling, repeatedly can be used over a long period of time does not become unusable because not a state in which the buckled articulated, moreover, the core metal and the like dirt etc. is unlikely accumulate inside does not need to be inserted and disposed, dirt or the like adhering to the inside can be used to easily washed off hygienically.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施例の可撓性チューブの軸線に垂直な断面の断面図である。 1 is a cross-sectional view of a cross section perpendicular to the axis of the flexible tube embodiment of the present invention.

【図2】本発明の実施例の可撓性チューブの腰折れ状態の側面断面図である。 2 is a side cross-sectional view of a buckling state of the flexible tube embodiment of the present invention.

【図3】本発明の実施例の内視鏡用カテーテルの外観図である。 3 is an external view of the endoscope catheter embodiment of the present invention.

【図4】本発明の実施例の可撓性チューブの曲げ試験の状態を示す略示図である。 It is a schematic view showing a state of bending test of the flexible tube embodiment of the present invention; FIG.

【図5】本発明の実施例の可撓性チューブの曲げ試験の結果を示す図表である。 5 is a chart bend showing the results of tests of the flexible tube embodiment of the present invention.

【図6】可撓性チューブが内視鏡の処置具挿通路に挿入される状態を示す外観図である。 6 is an external view showing a state in which the flexible tube is inserted into the biopsy channel of an endoscope.

【図7】従来の内視鏡用カテーテルに用いられている可撓性チューブの腰折れ状態の側面断面図である。 7 is a side sectional view of a buckling state of the flexible tube used in the conventional endoscopic catheter.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 可撓性チューブ d 内径(直径) D 外径(直径) t 肉厚 1 flexible tube d inner diameter (diameter) D outer diameter (diameter) t thickness

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】内視鏡の処置具挿通路に挿脱されるフッ素樹脂製の可撓性チューブを有する内視鏡用カテーテルにおいて、 上記可撓性チューブの外径(直径)寸法に対する肉厚の比を、0.2〜0.277の範囲にしたことを特徴とする内視鏡用カテーテル。 1. A catheter for an endoscope having an endoscope fluororesin of the flexible tube to be inserted into and removed from the biopsy channel of the wall thickness to the outer diameter (diameter) dimension of the flexible tube the ratio of the catheter for an endoscope, characterized in that it has a range of 0.2 to 0.277 of.
  2. 【請求項2】上記可撓性チューブの外径(直径)が略1.8mmであるのに対して、その肉厚が略0.4〜 Relative wherein the outer diameter of the flexible tube (diameter) is approximately 1.8 mm, the wall thickness of approximately 0.4
    0.5mmの範囲にある請求項1記載の内視鏡用カテーテル。 Endoscopic catheter of claim 1, wherein in the range of 0.5 mm.
  3. 【請求項3】上記可撓性チューブの外径(直径)が略2.3〜2.5mmの範囲にあるのに対して、その肉厚が略0.5〜0.6mmである請求項1記載の内視鏡用カテーテル。 Relative wherein the outer diameter of the flexible tube (diameter) in the range of approximately 2.3~2.5Mm, its thickness is substantially 0.5~0.6mm claim 1 endoscopic catheter according.
JP2000159795A 2000-05-30 2000-05-30 Catheter for endoscope Pending JP2001340465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000159795A JP2001340465A (en) 2000-05-30 2000-05-30 Catheter for endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000159795A JP2001340465A (en) 2000-05-30 2000-05-30 Catheter for endoscope

Publications (1)

Publication Number Publication Date
JP2001340465A true true JP2001340465A (en) 2001-12-11

Family

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Family Applications (1)

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Country Link
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0999089A (en) * 1995-10-06 1997-04-15 Olympus Optical Co Ltd Catheter
JPH11318820A (en) * 1998-05-20 1999-11-24 Olympus Optical Co Ltd Catheter for endoscope
JP2000102543A (en) * 1998-09-29 2000-04-11 Nippon Zeon Co Ltd Tubular medical instrument

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0999089A (en) * 1995-10-06 1997-04-15 Olympus Optical Co Ltd Catheter
JPH11318820A (en) * 1998-05-20 1999-11-24 Olympus Optical Co Ltd Catheter for endoscope
JP2000102543A (en) * 1998-09-29 2000-04-11 Nippon Zeon Co Ltd Tubular medical instrument

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