JP2001224598A - Endoscopic tissue collecting tool - Google Patents
Endoscopic tissue collecting toolInfo
- Publication number
- JP2001224598A JP2001224598A JP2000036165A JP2000036165A JP2001224598A JP 2001224598 A JP2001224598 A JP 2001224598A JP 2000036165 A JP2000036165 A JP 2000036165A JP 2000036165 A JP2000036165 A JP 2000036165A JP 2001224598 A JP2001224598 A JP 2001224598A
- Authority
- JP
- Japan
- Prior art keywords
- tissue
- needle shaft
- storage recess
- cross
- endoscope
- 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.)
- Granted
Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、内視鏡の処置具
挿通チャンネルに挿脱されて肝生検等を行うのに用いら
れる内視鏡用組織採取具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tissue sampling tool for an endoscope which is inserted into and removed from a treatment tool insertion channel of an endoscope and used for performing a liver biopsy or the like.
【０００２】[0002]
【従来の技術】図６は、従来の内視鏡用組織採取具とし
て用いられているいわゆるメンギーニ組織採取針の先端
部分を示しており、棒状の針軸１０の先端には尖った針
先１１が形成されると共に、切り取った標本組織を収納
するための組織収納凹部１２が、針先１１の近傍を側面
から窪ませた形状に形成されている。図７は、組織収納
凹部１２における針軸１０の、軸線に対して垂直な断面
の断面図である。2. Description of the Related Art FIG. 6 shows a distal end of a so-called Menghini tissue collecting needle used as a conventional endoscope tissue collecting tool. Are formed, and a tissue storage recess 12 for storing the cut sample tissue is formed in a shape in which the vicinity of the needle tip 11 is depressed from the side surface. FIG. 7 is a cross-sectional view of a cross section of the needle shaft 10 in the tissue storage recess 12 that is perpendicular to the axis.
【０００３】針軸１０に軸線方向に進退自在に被嵌され
た外套管２０の先端には、組織収納凹部１２に入り込ん
だ組織を切り取るための環状の刃２１が内周側に形成さ
れている。[0003] An annular blade 21 is formed on the inner peripheral side of the distal end of a mantle tube 20 which is fitted on the needle shaft 10 so as to be able to advance and retreat in the axial direction. .
【０００４】図８と図９は、そのような従来の内視鏡用
組織採取具を用いて生検組織を採取している状態を示し
ており、図８に示されるように、組織１００に突き刺し
た外套管２０を少し引き戻して組織収納凹部１２内に組
織１００の目標部分を入れ込み、次いで図９に示される
ように、外套管２０を瞬時に送り出して、組織収納凹部
１２内に入り込んでいる組織１００から標本組織１０１
を切り取るようになっている。FIG. 8 and FIG. 9 show a state in which a biopsy tissue is collected using such a conventional endoscope tissue collection tool. As shown in FIG. The pierced mantle tube 20 is pulled back slightly to insert the target portion of the tissue 100 into the tissue accommodating recess 12, and then the mantle tube 20 is immediately sent out to enter the tissue accommodating recess 12 as shown in FIG. 9. From tissue 100 to specimen tissue 101
Is cut out.
【０００５】[0005]
【発明が解決しようとする課題】しかし、組織収納凹部
１２部分が図７に示されるような断面形状の針軸１０
は、その部分で上下方向に簡単に曲がってしまうので、
針軸１０を外套管２０から突出した状態で組織１００に
突き刺す際や、組織１００に突き刺された針軸１０を軸
にして外套管２０を強く送り出す際に、図１０に示され
るように、針軸１０が組織収納凹部１２部分で折れ曲が
って使用できなくなってしまう場合がある。However, the needle shaft 10 having a sectional shape as shown in FIG.
Can easily bend up and down at that point,
When piercing the tissue 100 with the needle shaft 10 protruding from the mantle tube 20 or when strongly sending the mantle tube 20 around the needle shaft 10 pierced by the tissue 100, as shown in FIG. In some cases, the shaft 10 may be bent at the tissue receiving recess 12 and become unusable.
【０００６】そこで、例えば図１１に示されるように、
組織収納凹部１２部分の針軸１０の肉厚を厚くすること
が考えられるが、そのようにすると、曲げに対する強度
は向上するが、組織収納凹部１２の容量が小さくなって
十分な量の標本組織を採取することができない。Therefore, for example, as shown in FIG.
It is conceivable to increase the thickness of the needle shaft 10 in the tissue storage recess 12 portion. In this case, although the strength against bending is improved, the capacity of the tissue storage recess 12 is reduced, and a sufficient amount of specimen tissue is obtained. Cannot be collected.
【０００７】そこで本発明は、組織収納凹部部分におい
て針軸が優れた曲げ強度を有し、しかも十分な量の標本
組織を採取することができる内視鏡用組織採取具を提供
することを目的とする。Accordingly, an object of the present invention is to provide a tissue collecting tool for an endoscope in which a needle shaft has excellent bending strength in a tissue storage concave portion and can collect a sufficient amount of sample tissue. And
【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、本発明の内視鏡用組織採取具は、前方に向けて針先
が形成されると共にその針先の近傍部分の側面に組織収
納凹部が形成された針軸と、上記針軸に軸線方向に進退
自在に被嵌されて上記組織収納凹部に入り込んだ組織を
切り取るための刃が先端に形成された外套管とを有する
内視鏡用組織採取具において、組織収納凹部が、針軸を
略Ｃ字状の断面形状に窪ませて形成されているものであ
る。In order to achieve the above object, the present invention provides an endoscopic tissue collecting tool having a tip formed forward and having a tissue on the side of a portion near the tip. An endoscope having a needle shaft having a storage recess formed therein, and an outer tube having a blade formed at a distal end thereof, which is fitted on the needle shaft so as to be able to advance and retreat in the axial direction and cuts tissue that has entered the tissue storage recess. In the mirror tissue sampling tool, the tissue storage recess is formed by recessing the needle shaft into a substantially C-shaped cross section.
【０００９】その場合、組織収納凹部における針軸の断
面形状が、少なくとも半円程度以上の円弧状であればよ
い。また、組織収納凹部における針軸の断面形状が、先
側から後方へ次第に角度の大きな円弧状に形成されてい
てもよく、その場合には、組織収納凹部における針軸の
断面形状が、最も後方部分において少なくとも半円程度
以上の円弧状であればよい。In this case, it is only necessary that the cross-sectional shape of the needle shaft in the tissue accommodating concave portion is at least a semicircular arc. Further, the cross-sectional shape of the needle shaft in the tissue storage recess may be formed in an arc shape with a gradually increasing angle from the front side to the rear, and in this case, the cross-sectional shape of the needle shaft in the tissue storage recess is the rearmost. It is sufficient if the portion has an arc shape of at least about a semicircle.
【００１０】[0010]
【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１は、本発明の第１の実施例の内視鏡用組
織採取具の先端部分を示しており、（Ａ）は外套管２０
の先端が所定の先端位置まで押し出された状態を示し、
（Ｂ）は、外套管２０の先端が後方に引き戻された状態
を示している。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a distal end portion of a tissue sampling tool for an endoscope according to a first embodiment of the present invention.
Shows a state in which the tip of is pushed out to a predetermined tip position,
(B) has shown the state where the front-end | tip of the mantle tube 20 was pulled back backward.
【００１１】断面形状が円形の針軸１０の先端には、前
方に向けて尖った無孔の針先１１が形成されており、針
先１１の直後の部分には、組織を収納するための組織収
納凹部１２が、針軸１０を側面から窪ませた形状に形成
されている。At the tip of the needle shaft 10 having a circular cross-sectional shape, a non-porous needle tip 11 which is pointed forward is formed, and a portion immediately behind the needle tip 11 is used for accommodating tissue. The tissue accommodating recess 12 is formed in a shape in which the needle shaft 10 is depressed from the side.
【００１２】針軸１０には、外套管２０が軸線方向に進
退自在に略全長にわたって被嵌されている。外套管２０
の先端部分は先細りのテーパ状に形成されており、その
結果、外套管２０の内周先端部分が環状の刃２１になっ
ている。An outer tube 20 is fitted on the needle shaft 10 so as to be able to advance and retreat in the axial direction over substantially the entire length. Mantle tube 20
Is formed in a tapered tapered shape. As a result, the inner peripheral tip portion of the outer tube 20 is an annular blade 21.
【００１３】そして、外套管２０を手元側で進退操作す
ることにより、図１の（Ａ）、（Ｂ）に示されるよう
に、外套管２０の先端部分が組織収納凹部１２を完全に
覆う状態と組織収納凹部１２より後方に退避した状態と
の間を移動し、組織収納凹部１２に入り込んだ組織を刃
２１によって切り取ることができる。The distal end portion of the outer tube 20 completely covers the tissue accommodating recess 12 as shown in FIGS. 1A and 1B by operating the outer tube 20 forward and backward. And the tissue retracted backward from the tissue storage recess 12, and the tissue that has entered the tissue storage recess 12 can be cut off by the blade 21.
【００１４】組織収納凹部１２における針軸１０の、軸
線に対して垂直な断面の断面形状は、II−II断面を図示
する図２に示されるように、針軸１０の半部が完全に切
り欠かれ、残りの半部には外周面に沿う一定の厚さの円
弧状の壁が残されて、略Ｃ字状に形成されている。The cross-sectional shape of the needle shaft 10 in the tissue accommodating recess 12 perpendicular to the axis is formed by cutting a half of the needle shaft 10 completely as shown in FIG. The remaining half portion is formed in a substantially C-shape, leaving an arc-shaped wall having a constant thickness along the outer peripheral surface.
【００１５】言い換えると、組織収納凹部１２における
針軸１０の、軸線に対して垂直な断面の断面形状は、針
軸１０の元々の外周面を外面とする円弧状に形成されて
おり、少なくとも半円程度以上の円弧状であればよい。In other words, the cross-sectional shape of the needle shaft 10 in the tissue storage recess 12 perpendicular to the axis is formed in an arc shape having the original outer peripheral surface of the needle shaft 10 as an outer surface, and is formed at least halfway. The shape may be an arc of a circle or more.
【００１６】組織収納凹部１２において針軸１０をこの
ような断面形状に形成することにより、組織収納凹部１
２の容積をさほど減少させることなく優れた曲げ強度を
得ることができ、その結果、組織収納凹部１２が折り曲
がることなく十分な量の標本組織を採取することができ
る。By forming the needle shaft 10 in such a cross-sectional shape in the tissue storage recess 12, the tissue storage recess 1 is formed.
An excellent bending strength can be obtained without significantly reducing the volume of No. 2 and, as a result, a sufficient amount of specimen tissue can be collected without bending the tissue storage recess 12.
【００１７】図３は、本発明の第２の実施例の内視鏡用
組織採取具の全体構成を示しており、第１の実施例と同
様にＣ字状の断面形状に形成された組織収納凹部１２
が、IV−IV断面を図示する図４及びＶ−Ｖ断面を図示す
る図５にも示されるように、先側から後方へ次第に角度
の大きな円弧状に形成されている。この場合、組織収納
凹部１２の断面形状が、最も後方部分において少なくと
も半円程度以上の円弧状であればよい。FIG. 3 shows the entire configuration of a tissue sampling tool for an endoscope according to a second embodiment of the present invention. Similar to the first embodiment, a tissue formed in a C-shaped cross section is shown in FIG. Storage recess 12
However, as shown in FIG. 4 illustrating the IV-IV cross section and FIG. 5 illustrating the VV cross section, it is formed in an arc shape having a gradually increasing angle from the front side to the rear side. In this case, the cross-sectional shape of the tissue storage recess 12 may be at least a semicircular arc at the rearmost portion.
【００１８】針軸１０の針先１１に力が加わると、組織
収納凹部１２には後方へいくほど大きな曲げ力が作用す
るので、組織収納凹部１２における針軸１０の断面形状
をこのように先側から後方へ次第に角度の大きな円弧状
に形成すればよく、組織収納凹部１２の容量を最大限に
確保することができる。When a force is applied to the needle tip 11 of the needle shaft 10, a large bending force acts on the tissue accommodating concave portion 12 toward the rear, so that the cross-sectional shape of the needle shaft 10 in the tissue accommodating concave portion 12 is changed as described above. What is necessary is just to form in the shape of an arc with a big angle gradually from the side to the back, and the capacity | capacitance of the tissue accommodation recessed part 12 can be ensured to the maximum.
【００１９】なお、この実施例の内視鏡用組織採取具で
は、針軸１０の組織収納凹部１２より後方部分がパイプ
状に形成されていて、その内孔部分が手元側から組織収
納凹部１２に通じる吸引路１３になっている。したがっ
て、標本組織を組織収納凹部１２内に吸い付けた状態に
してから外套管２０の刃２１で切断することができる。In the tissue collecting tool for an endoscope of this embodiment, the portion of the needle shaft 10 behind the tissue storage recess 12 is formed in a pipe shape, and the inner hole portion is formed from the hand side toward the tissue storage recess 12. The suction path 13 is connected to the suction path 13. Therefore, the sample tissue can be cut by the blade 21 of the mantle tube 20 after being sucked into the tissue storage recess 12.
【００２０】針軸１０と外套管２０の手元側には、各々
指掛け１４，２２が形成され、針軸１０の手元側端部に
は、吸引具５０を接続するための口金１６が吸引路１３
に連通して形成されている。Finger hooks 14 and 22 are formed on the proximal side of the needle shaft 10 and the mantle tube 20, respectively. At the proximal end of the needle shaft 10, a mouthpiece 16 for connecting a suction device 50 is provided with a suction passage 13.
Is formed in communication with
【００２１】また、針軸１０に対する外套管２０の押し
込み量を目視するための目盛り１５が針軸１０の外周面
に形成されており、針軸１０に対して外套管２０を任意
の位置で固定するための手動固定ネジ２３が外套管２０
側に取り付けられている。A scale 15 is formed on the outer peripheral surface of the needle shaft 10 for visually checking the amount of pushing of the outer tube 20 with respect to the needle shaft 10, and the outer tube 20 is fixed to the needle shaft 10 at an arbitrary position. The manual fixing screw 23 for
Attached to the side.
【００２２】[0022]
【発明の効果】本発明によれば、組織収納凹部が、針軸
を略Ｃ字状の断面形状に窪ませて形成されていることに
より、組織収納凹部において針軸が優れた曲げ強度を有
するので、使用時に針軸が折れ曲がって使用できなくな
ってしまうようなケースが大幅に減少し、しかも十分な
量の標本組織を組織収納凹部内に採取することができ
る。According to the present invention, the tissue accommodating recess is formed by recessing the needle shaft into a substantially C-shaped cross section, so that the needle shaft has excellent bending strength in the tissue accommodating recess. Therefore, the number of cases in which the needle shaft is bent during use and cannot be used is greatly reduced, and a sufficient amount of sample tissue can be collected in the tissue storage recess.
【図１】本発明の第１の実施例の内視鏡用組織採取具の
先端部分の側面断面図である。FIG. 1 is a side cross-sectional view of a distal end portion of a tissue sampling tool for an endoscope according to a first embodiment of the present invention.
【図２】図１におけるII−II断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】本発明の第２の実施例の内視鏡用組織採取具の
全体構成を示す側面断面図である。FIG. 3 is a side sectional view showing the entire configuration of a tissue sampling tool for an endoscope according to a second embodiment of the present invention.
【図４】図３におけるIV−IV断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG.
【図５】図３におけるＶ−Ｖ断面図である。FIG. 5 is a sectional view taken along line VV in FIG. 3;
【図６】従来の内視鏡用組織採取具の先端部分の側面断
面図である。FIG. 6 is a side sectional view of a distal end portion of a conventional endoscope tissue sampling tool.
【図７】図６におけるVII−VII断面図である。FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;
【図８】従来の内視鏡用組織採取具の使用状態における
先端部分の側面断面図である。FIG. 8 is a side sectional view of a distal end portion of a conventional tissue sampling tool for an endoscope in a used state.
【図９】従来の内視鏡用組織採取具の使用状態における
先端部分の側面断面図である。FIG. 9 is a side cross-sectional view of a distal end portion of a conventional endoscope tissue sampling tool in use.
【図１０】従来の内視鏡用組織採取具の針軸が組織収納
凹部で曲がってしまった状態を示す側面断面図である。FIG. 10 is a side sectional view showing a state in which a needle shaft of a conventional tissue sampling tool for an endoscope is bent in a tissue storage recess.
【図１１】組織収納凹部における針軸の断面形状の改良
例を示す断面図である。FIG. 11 is a cross-sectional view showing an improved example of the cross-sectional shape of the needle shaft in the tissue storage recess.
１０ 針軸 １１ 針先 １２ 組織収納凹部 ２０ 外套管 ２１ 刃 DESCRIPTION OF SYMBOLS 10 Needle shaft 11 Needle tip 12 Tissue storage recess 20 Mantle tube 21 Blade
Claims (4)
針先の近傍部分の側面に組織収納凹部が形成された針軸
と、上記針軸に軸線方向に進退自在に被嵌されて上記組
織収納凹部に入り込んだ組織を切り取るための刃が先端
に形成された外套管とを有する内視鏡用組織採取具にお
いて、 上記組織収納凹部が、上記針軸を略Ｃ字状の断面形状に
窪ませて形成されていることを特徴とする内視鏡用組織
採取具。1. A needle shaft having a needle tip formed forward and having a tissue storage recess formed on a side surface of a portion near the needle tip, and fitted to the needle shaft so as to be able to advance and retreat in the axial direction. A tissue collection tool for an endoscope having a mantle tube formed at the tip with a blade for cutting the tissue that has entered the tissue storage recess, wherein the tissue storage recess has a substantially C-shaped cross-sectional shape of the needle shaft. A tissue sampling tool for an endoscope, wherein the tool is formed by being depressed in a hole.
形状が、少なくとも半円程度以上の円弧状である請求項
１記載の内視鏡用組織採取具。2. A tissue sampling tool for an endoscope according to claim 1, wherein a cross-sectional shape of said needle shaft in said tissue accommodating recess is at least a semicircular arc.
形状が、先側から後方へ次第に角度の大きな円弧状に形
成されている請求項１記載の内視鏡用組織採取具。3. A tissue sampling tool for an endoscope according to claim 1, wherein a cross-sectional shape of said needle shaft in said tissue accommodating recess is formed in an arc shape having a gradually increasing angle from a front side to a rear side.
形状が、最も後方部分において少なくとも半円程度以上
の円弧状である請求項３記載の内視鏡用組織採取具。4. The tissue sampling tool for an endoscope according to claim 3, wherein a cross-sectional shape of the needle shaft in the tissue storage recess is at least a semicircular arc at the rearmost portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000036165A JP4554750B2 (en) | 2000-02-15 | 2000-02-15 | Endoscopy tissue collection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000036165A JP4554750B2 (en) | 2000-02-15 | 2000-02-15 | Endoscopy tissue collection tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001224598A true JP2001224598A (en) | 2001-08-21 |
| JP4554750B2 JP4554750B2 (en) | 2010-09-29 |
Family
ID=18560246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000036165A Expired - Fee Related JP4554750B2 (en) | 2000-02-15 | 2000-02-15 | Endoscopy tissue collection tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4554750B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101481732B1 (en) | 2013-04-17 | 2015-01-12 | 전북대학교산학협력단 | needle for inspecting the tissue of body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09504979A (en) * | 1994-03-14 | 1997-05-20 | ジョン アール ハーガ， | Improved incision tip for biopsy needle |
| JPH10507952A (en) * | 1994-10-31 | 1998-08-04 | ボストン・サイエンティフィック・コーポレーション | Biopsy needle |
-
2000
- 2000-02-15 JP JP2000036165A patent/JP4554750B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09504979A (en) * | 1994-03-14 | 1997-05-20 | ジョン アール ハーガ， | Improved incision tip for biopsy needle |
| JPH10507952A (en) * | 1994-10-31 | 1998-08-04 | ボストン・サイエンティフィック・コーポレーション | Biopsy needle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101481732B1 (en) | 2013-04-17 | 2015-01-12 | 전북대학교산학협력단 | needle for inspecting the tissue of body |
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| Publication number | Publication date |
|---|---|
| JP4554750B2 (en) | 2010-09-29 |
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