JP2007175120A - Sliding double-lumen catheter - Google Patents

Sliding double-lumen catheter Download PDF

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JP2007175120A
JP2007175120A JP2005374192A JP2005374192A JP2007175120A JP 2007175120 A JP2007175120 A JP 2007175120A JP 2005374192 A JP2005374192 A JP 2005374192A JP 2005374192 A JP2005374192 A JP 2005374192A JP 2007175120 A JP2007175120 A JP 2007175120A
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outer cylinder
cylinder
inner cylinder
lumen catheter
locked
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Toru Inoue
井上　　徹
Katsuyuki Nagatoya
克之 長門谷
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Osaka Industrial Promotion Organization
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Osaka Industrial Promotion Organization
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding double-lumen catheter structured so that an inner tube is not pulled out of an outer tube even if the rear part of the catheter is cut. <P>SOLUTION: The catheter comprises the outer tube 2, the inner tube 3 slidably inserted into the outer tube 2 to demarcate a channel space X between the inner tube and the inner wall of the outer tube 2, a large diameter part 4 disposed at the distal end of the inner tube 3 to close the channel space X by drawing the inner tube 3 into the outer tube 2, a locking part 5 disposed on the outer surface of the inner tube 3 and a locked part 6 disposed on the inner surface of the outer tube 2 to be locked with the locking part 5. The locking part 5 has a path for securing the channel in the channel space X, and is structured to be locked with the locked part 6 of the outer tube 2 when the inner tube 3 is pushed out of the outer tube 2 by a prescribed length. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ダブルルーメンカテーテルに係り、詳しくは、内管と外管との間に脱血用間隙を形成しつつ内筒を外筒内でスライド可能にしたスライド式ダブルルーメンカテーテルに関する。   The present invention relates to a double-lumen catheter, and more particularly to a slide-type double-lumen catheter in which an inner cylinder is slidable in an outer cylinder while forming a blood removal gap between the inner and outer tubes.

体外循環治療では、血液を導出し、返血するためのルート、いわゆるブラッドアクセス（blood access）が必要である。ブラッドアクセスを確保する手段として最も一般的な手段は、中心静脈へのカテーテル留置であり、脱血腔と送血腔を備えるダブルルーメンカテーテルが知られている。   The extracorporeal circulation treatment requires a route for extracting blood and returning blood, so-called blood access. The most common means for ensuring blood access is placement of a catheter in the central vein, and a double lumen catheter having a blood removal cavity and a blood delivery cavity is known.

ところで、血液は、適当な血流がない場合や、異物との接触によって凝固機能が働く。カテーテルは、生体にとって異物であるから、血液中に留置すると血栓が生じてしまう。   By the way, blood has a coagulation function when there is no appropriate blood flow or when it is in contact with a foreign substance. Since a catheter is a foreign substance for a living body, if it is placed in blood, a thrombus will be generated.

そこで、静脈留置カテーテルの内腔での凝血による血栓を防止するため、体外循環終了後に、カテーテル内に抗凝血剤を注入する、いわゆるヘパリンロックを行う。   Therefore, in order to prevent blood clots due to blood clots in the lumen of the venous catheter, so-called heparin lock is performed after the extracorporeal circulation, in which an anticoagulant is injected into the catheter.

ところが、従来のダブルルーメンカテーテルの多くは、一つの管の内部に長さ方向に延びる隔壁を形成し、該隔壁によって脱血腔と送血腔の２つの流路を形成した隔壁形のものである（特許文献１の図１１参照）。斯かる構造のダブルルーメンカテーテルは、ヘパリン生食液が短時間で血管側に放出されてカテーテル内に血液が流れ込み、血栓を生じることがあった。   However, many of the conventional double lumen catheters are of a partition type in which a partition wall extending in the length direction is formed inside a single tube, and two flow paths of a blood removal cavity and a blood supply cavity are formed by the partition wall. Yes (see FIG. 11 of Patent Document 1). In the double lumen catheter having such a structure, the heparin saline solution is released to the blood vessel side in a short time, and blood may flow into the catheter to cause a thrombus.

そこで、内筒の先端部に拡径部を設けて、非使用時には内筒を外筒内に引き込めばこの拡径部が外筒の内壁に当接して外筒と内筒との間の血流路を塞ぐことにより、ヘパリン生食液の放出を阻止し、血栓の発生を防止するように構成されたスライド式ダブルルーメンカテーテルが提案されている（例えば、特許文献１）。スライド式ダブルルーメンカテーテルは、後部部分に位置固定具を備えており、この位置固定具は、拡径部が外筒から突出されて内筒と外筒先端部との間に脱血腔先端開口部を形成する位置と、拡径部が外筒内に収納されて脱血腔先端開口部を閉塞する位置とに、外筒に対して内筒の位置を固定する。
特開平９−２５３２１４号公報 Therefore, an enlarged diameter portion is provided at the distal end of the inner cylinder, and when the inner cylinder is retracted into the outer cylinder when not in use, the enlarged diameter section abuts against the inner wall of the outer cylinder and the gap between the outer cylinder and the inner cylinder. There has been proposed a sliding double lumen catheter configured to block the blood flow path to prevent the release of heparin saline and prevent the generation of thrombus (for example, Patent Document 1). The slide-type double lumen catheter has a position fixing tool at the rear part, and this position fixing tool has a diameter-expanded portion projecting from the outer cylinder and opening the blood removal cavity tip between the inner cylinder and the outer cylinder tip. The position of the inner cylinder is fixed with respect to the outer cylinder at a position where the portion is formed and a position where the enlarged diameter portion is accommodated in the outer cylinder and closes the blood removal cavity tip opening.
JP-A-9-253214

ところで、カテーテルの交換が必要になった場合に、スライド式でない従来の隔壁形のダルブルーメンカテーテルでは、例えば図１１に示すように、生体Ｈに留置したカテーテル１０のカテーテル後部部分１１を仮想線Ｃで示す箇所でカットし、後部部分１１をカットしたカテーテル１０の留置部分にガイドワイヤー（不図示）を通して血管を確保しておいて、そのカテーテル１０留置部分を抜いた後に、新しいカテーテルをガイドワイヤーに通して差し替えることが行われる。   By the way, when it is necessary to replace the catheter, in the conventional bulk-type Dalbrumen catheter that is not slidable, for example, as shown in FIG. A blood vessel is secured through a guide wire (not shown) in the indwelling portion of the catheter 10 cut at the location indicated by, and the rear portion 11 is cut. After removing the indwelling portion of the catheter 10, a new catheter is used as the guide wire. Replacement is done through.

一方、スライド式ダブルルーメンカテーテルでは、上記のようにカテーテル後部部分をカットしてガイドワイヤーを通そうとすると、内筒が外筒に対してフリーとなっているから、内筒が血管内に入ってしまうおそれがある。そのため、スライド式ダブルルーメンカテーテルでは、カット禁止という注意喚起表示を製品に付するとともに、製品の取扱説明を徹底している。しかしながら、カテーテル後部部分をカットしない場合は、カテーテルの後部部分からガイドワイヤーを通すことになるが、その場合には後部部分の滅菌が必要になって手間がかかる。   On the other hand, in the slide type double lumen catheter, if the rear part of the catheter is cut and the guide wire is passed through as described above, the inner cylinder is free with respect to the outer cylinder. There is a risk that. For this reason, the slide-type double-lumen catheter is marked with a warning that prohibits cutting, and the handling of the product is thoroughly explained. However, when the rear portion of the catheter is not cut, a guide wire is passed from the rear portion of the catheter. In this case, the rear portion needs to be sterilized, which is troublesome.

そこで、本発明は、カテーテル後部部分をカットしても内筒が外筒から抜け出ない構造のスライド式ダブルルーメンカテーテルを提供することを目的とする。   Therefore, an object of the present invention is to provide a slide type double lumen catheter having a structure in which an inner cylinder does not come out of an outer cylinder even when a rear portion of the catheter is cut.

上記目的を達成するため、本発明に係るスライド式ダブルルーメンカテーテルは、外筒と、該外筒内にスライド可能に挿入されて該外筒内壁との間に流路用間隙を画成する内筒と、前記内筒の先端部に設けられて該内筒を前記外筒に引き込むことにより前記流路用間隙を塞ぐ拡径部と、該内筒の外周面に設けられた係止部と、前記外筒の内周面に設けられて前記係止部が係止する被係止部と、を有し、前記係止部は、前記流路用間隙の流路を確保するための通路が形成され、且つ、前記内筒を前記外筒から所定長さ押し出したときに前記外筒の被係止部に係止するように構成されていることを特徴とする。   In order to achieve the above object, a sliding double lumen catheter according to the present invention is an inner tube that is slidably inserted into an outer tube and that defines a flow passage gap between the inner tube and the inner wall of the outer tube. A cylinder, a diameter-enlarged portion that is provided at a tip portion of the inner cylinder and closes the gap for the flow path by drawing the inner cylinder into the outer cylinder, and a locking portion provided on an outer peripheral surface of the inner cylinder A locked portion that is provided on an inner peripheral surface of the outer cylinder and that is locked by the locking portion, and the locking portion is a passage for securing a flow path of the flow path gap. And is configured to be locked to the locked portion of the outer cylinder when the inner cylinder is pushed out of the outer cylinder for a predetermined length.

前記被係止部は、前記外筒の先端部を先窄まり状にして該外筒先端部の内径を縮径することにより形成することが好ましい。   The locked portion is preferably formed by constricting the tip of the outer cylinder to reduce the inner diameter of the tip of the outer cylinder.

前記係止部は、前記内筒の外周面に放射状に突出していることが好ましい。   It is preferable that the locking portion protrudes radially on the outer peripheral surface of the inner cylinder.

前記係止部が、前記内筒の長さ方向に沿って延びることが好ましい。   It is preferable that the locking portion extends along the length direction of the inner cylinder.

また、上記目的を達成するため、本発明に係るスライド式ダブルルーメンカテーテルは、外筒と、該外筒内にスライド可能に挿入されて該外筒内壁との間に流路用間隙を画成する内筒と、前記内筒の先端部に設けられて該内筒を前記外筒に引き込むことにより前記流路用間隙を塞ぐ拡径部と、を有し、前記外筒からの前記内筒の押し出し長さを所定長さに制限するように前記外筒と前記拡径部とを糸状部材により連結したことを特徴とする。   In order to achieve the above object, a sliding double lumen catheter according to the present invention is slidably inserted into an outer cylinder and an inner wall of the outer cylinder to define a flow passage gap. And an enlarged diameter portion that is provided at a tip portion of the inner cylinder and closes the flow path gap by drawing the inner cylinder into the outer cylinder. The outer cylinder and the enlarged-diameter portion are connected by a thread-like member so as to limit the extruded length to a predetermined length.

本発明に係るスライド式ダブルルーメンカテーテルによれば、係止部に被係止部が係止することにより、内筒が外筒から抜け出るのを防ぐことができる。   According to the slide type double lumen catheter according to the present invention, the locked portion is locked to the locking portion, thereby preventing the inner tube from coming out of the outer tube.

本発明に係るスライド式ダブルルーメンカテーテルの実施形態について、図１〜１０を参照して説明する。   An embodiment of a sliding double lumen catheter according to the present invention will be described with reference to FIGS.

図１〜図４は、スライド式ダブルルーメンカテーテルの要部を示す縦断面図である。なお、これらの図において、位置固定を含む後部部分は従来と同様の構成であるので、図示省略している。   1 to 4 are longitudinal sectional views showing a main part of a sliding double lumen catheter. In these drawings, the rear portion including the position fixing has the same configuration as the conventional one, and is not shown.

スライド式ダブルルーメンカテーテル１は、外筒２と、外筒２内にスライド可能に挿入された内筒３とを備えている。外筒２の内周壁と内筒３の外周壁の間には、送血流のための流路用間隙Ｘが画成されている。外筒２及び内筒３は、可撓性のチューブによって形成されている。   The sliding double lumen catheter 1 includes an outer cylinder 2 and an inner cylinder 3 that is slidably inserted into the outer cylinder 2. Between the inner peripheral wall of the outer cylinder 2 and the outer peripheral wall of the inner cylinder 3, a flow passage gap X for blood flow is defined. The outer cylinder 2 and the inner cylinder 3 are formed by flexible tubes.

内筒３は、その先端部に拡径部４が固定されている。拡径部４は、内筒３を外筒２内へ引き込むことにより、外筒２と内筒３との間の流路用間隙Ｘを塞ぐようになっている。   The inner cylinder 3 has a diameter-enlarged portion 4 fixed to the tip portion thereof. The enlarged diameter portion 4 is configured to close the flow path gap X between the outer cylinder 2 and the inner cylinder 3 by drawing the inner cylinder 3 into the outer cylinder 2.

内筒３の外周面に係止部５が設けられ、係止部５が係止する被係止部６が外筒２の内周面に設けられている。   A locking portion 5 is provided on the outer peripheral surface of the inner cylinder 3, and a locked portion 6 that is locked by the locking portion 5 is provided on the inner peripheral surface of the outer cylinder 2.

図１〜４に示す例において被係止部６は、外筒２の先端部を先窄まり状にしてその内径を縮径することにより形成されている。被係止部６の内径は、脱血流の流れを妨げないような寸法に設定される。   In the example shown in FIGS. 1 to 4, the locked portion 6 is formed by constricting the tip end portion of the outer cylinder 2 and reducing the inner diameter thereof. The inner diameter of the locked portion 6 is set to a dimension that does not hinder the flow of blood removal.

一方、係止部５は、内筒３の外周面に放射状に突出し、内筒３の長さ方向に沿って延びるフィン状部を備えている。斯かる形状の係止部５は、隣り合うフィン状部の間に、流路用間隙Ｘの流路を確保するための通路が形成される。係止部５は、血流抵抗を少なくするため、できるだけ薄く且つ小さくすることが好ましい。   On the other hand, the locking portion 5 includes a fin-like portion that protrudes radially on the outer peripheral surface of the inner cylinder 3 and extends along the length direction of the inner cylinder 3. In the locking portion 5 having such a shape, a passage for securing a flow passage for the flow passage gap X is formed between adjacent fin-like portions. The locking portion 5 is preferably as thin and small as possible in order to reduce blood flow resistance.

係止部５は、内筒３を外筒２から所定長さ突出させたときに外筒２の被係止部６に係止する位置に設けられている。具体的には、内筒と外筒先端部と間に脱血腔先端開口部を形成する位置まで内筒３を押し出すことができ、且つ、カットされる位置より先端側にあれば良い。なお、内筒と外筒の脱血腔先端開口部（流路用間隙Ｘ先端開口部）を形成する内筒押し出し位置は、ダブルルーメンカテーテルにおいての後部部分にある図示しない位置固定具によって決まる。   The locking portion 5 is provided at a position where the locking portion 5 is locked to the locked portion 6 of the outer cylinder 2 when the inner cylinder 3 is projected from the outer cylinder 2 by a predetermined length. Specifically, the inner cylinder 3 can be pushed out to a position where a blood removal cavity distal end opening is formed between the inner cylinder and the outer cylinder distal end, and the distal end side of the cut position is sufficient. It should be noted that the inner cylinder push-out position for forming the blood removal cavity distal end opening (the flow path gap X distal end opening) between the inner cylinder and the outer cylinder is determined by a position fixing tool (not shown) in the rear portion of the double lumen catheter.

上記構成を有するスライド式ダブルルーメンカテーテルは、体外循環治療を行うときは、後部部分にある図示しない位置固定具を操作して、内筒３を外筒２から所定長さ押し出し、内筒３と外筒先端部との間に脱血腔先端開口部を形成させ、流路用間隙を通じて脱血を行うとともに、内筒３の内腔を通じて送血する（図１）。このとき、係止部５を内筒２外周面に放射状に突出させる等して、係止部５に脱血流の通路を形成するので、脱血流の流れを阻害しない。治療を中断又は中止するときは、前記位置固定具の操作によって、内筒３を外筒に引き込み、拡径部４で外筒２の先端を塞ぎ、脱血流を閉塞する（図３）。そして、必要に応じて、後部部分を所要箇所（図１１の仮想線Ｃ参照）でカットして切り離しても、係止部５が被係止部６に係止するため、ガイドワイヤーを挿しても、内筒３が外筒２から離れて血管内に入っていくことは無い（図４）。   When the extracorporeal circulation treatment is performed, the slide type double lumen catheter having the above configuration operates a position fixing tool (not shown) in the rear portion to push the inner cylinder 3 out of the outer cylinder 2 for a predetermined length. A blood removal cavity tip opening is formed between the distal end of the outer cylinder, blood is removed through the channel gap, and blood is fed through the lumen of the inner cylinder 3 (FIG. 1). At this time, the flow of the blood flow is not hindered because the passage of the blood flow is formed in the lock portion 5 by causing the locking portion 5 to project radially on the outer peripheral surface of the inner cylinder 2. When the treatment is interrupted or stopped, the inner cylinder 3 is drawn into the outer cylinder by the operation of the position fixing tool, and the distal end of the outer cylinder 2 is blocked by the enlarged diameter portion 4 to block the blood removal (FIG. 3). And if necessary, even if the rear portion is cut and separated at a required location (see phantom line C in FIG. 11), the locking portion 5 is locked to the locked portion 6, so that a guide wire is inserted. However, the inner cylinder 3 does not leave the outer cylinder 2 and enter the blood vessel (FIG. 4).

スライド式ダブルルーメンカテーテルは、内腔を半割にして一方側の腔から脱血する従来のスライド式でないダブルルーメンカテーテルに比べ、内筒の全外周囲から脱血を行うことができるため、血管内壁への吸い付きによる脱血腔の閉塞を改善している。係止部５を内筒の長さ方向に沿って延びる形態とすることにより、内筒３及び外筒２の撓みに対して一定の抵抗となり、その結果、血管内壁への吸い付きによる脱血腔の閉塞防止効果を更に高めることができる。   Compared to the conventional non-sliding double lumen catheter that divides blood from one side of the lumen by dividing the lumen into half, the sliding double lumen catheter can remove blood from the entire periphery of the inner tube. The obstruction of the blood removal space due to suction on the inner wall is improved. By adopting a configuration in which the locking portion 5 extends along the length direction of the inner cylinder, a certain resistance is obtained against the bending of the inner cylinder 3 and the outer cylinder 2, and as a result, blood removal due to suction to the inner wall of the blood vessel. The effect of preventing occlusion of the cavity can be further enhanced.

また、上記構成のスライド式ダブルルーメンカテーテルは、製造工程を大きく変更せずに製造することが可能である。   Moreover, the sliding double lumen catheter having the above-described configuration can be manufactured without greatly changing the manufacturing process.

内筒は、上記例では送血腔がガイドワイヤー通し孔を兼ねる形態を示したが、例えば、図５に示すように、送血腔３ａとガイドワイヤー用孔３ｂとが内筒３内を別個に平行に延びる形態とすることもできる。   In the above example, the inner cylinder has a form in which the blood feeding cavity also serves as a guide wire passage hole. For example, as shown in FIG. 5, the blood feeding cavity 3a and the guide wire hole 3b are separated in the inner cylinder 3. It is also possible to adopt a form extending in parallel with each other.

また、上記例では内筒の送血腔出口を拡径部の先端に設けた例を示しているが、送血腔出口は拡径部の先端に限らず、図５に示すように、拡径部４近傍の内筒３の周面に送血腔３ａの出口を開口させることもできる。   In the above example, the blood feeding cavity outlet of the inner cylinder is provided at the tip of the enlarged diameter portion. However, the blood feeding cavity outlet is not limited to the tip of the enlarged diameter portion, and as shown in FIG. The outlet of the blood feeding cavity 3a can be opened on the peripheral surface of the inner cylinder 3 in the vicinity of the diameter portion 4.

さらに被係止部６は、例えば、図６に示すように、外筒２の内壁に係止部５がスライド可能に嵌る長手方向溝２ａを形成し、この長手方向溝２ａの先端の終端部に係止部５が係止する構成とする等して、外筒２の先端から離れた位置（カットされ得る位置より先端側の位置）に設けることもできる。   Further, as shown in FIG. 6, for example, the locked portion 6 is formed with a longitudinal groove 2 a in which the locking portion 5 is slidably fitted on the inner wall of the outer cylinder 2, and a terminal portion at the tip of the longitudinal groove 2 a. For example, it can be provided at a position away from the distal end of the outer cylinder 2 (a position closer to the distal end than a position where it can be cut).

また、係止部５は、フィン状のものに代えて、例えば、鍔状をした金属メッシュ（不図示）を内筒２の外周面に取り付ける等しても良い。   Further, the locking portion 5 may be replaced with, for example, a hook-shaped metal mesh (not shown) attached to the outer peripheral surface of the inner cylinder 2 instead of the fin-shaped one.

さらに、図８や図９に示すように、外筒２の開口端に開口面積を広げるための切り込み部２ｂを設け、その開口端形状に適合するように拡径部４を形成することができる。それによって、外筒２の先端が先窄まり状であっても、外筒２先端の開口面積が増加し、脱血流の流入量を増すことができる。   Further, as shown in FIG. 8 and FIG. 9, a cutout portion 2b for expanding the opening area is provided at the opening end of the outer cylinder 2, and the enlarged diameter portion 4 can be formed so as to conform to the shape of the opening end. . Thereby, even if the front end of the outer cylinder 2 is tapered, the opening area of the front end of the outer cylinder 2 is increased, and the amount of inflow of blood removal can be increased.

さらに他の実施形態においては、図１０に示すように、外筒２と拡径部４とをナイロンテグス等の糸状部材７により連結している。それによって、外筒２からの内筒３の押し出し長さを所定長さに制限することができるため、必要に応じて後部部分を所要箇所（図１１の仮想線Ｃ参照）でカットして切り離してガイドワイヤーを挿しても、内筒３が外筒２から離れて血管内に入っていくことは無い。   In still another embodiment, as shown in FIG. 10, the outer cylinder 2 and the enlarged diameter portion 4 are connected by a thread-like member 7 such as nylon teg. As a result, the length of the inner cylinder 3 that is pushed out from the outer cylinder 2 can be limited to a predetermined length. Therefore, the rear portion is cut and cut off at a required location (see the phantom line C in FIG. 11) as necessary. Even if the guide wire is inserted, the inner cylinder 3 does not leave the outer cylinder 2 and enter the blood vessel.

以上、本発明の好適な実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲によって規定される範囲を逸脱しない限りにおいて種々の変更が可能である。   The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope defined by the claims.

本発明に係るスライド式ダブルルーメンカテーテルの実施形態を概念的に示す要部拡大縦断面図である。It is a principal part expanded vertical sectional view which shows notionally the embodiment of the slide type double lumen catheter which concerns on this invention. 図１のII-II線に沿う横断面図である。FIG. 2 is a transverse sectional view taken along line II-II in FIG. 1. 図１のスライド式ダブルルーメンカテーテルの非使用状態を示す要部拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a main part showing a non-use state of the sliding double lumen catheter of FIG. 1. 図１のスライド式ダブルルーメンカテーテルを後部部分カットした状態を示す要部拡大縦断面図である。FIG. 2 is an enlarged longitudinal sectional view of a main part showing a state where a rear part of the sliding double lumen catheter of FIG. 1 is cut. 本発明に係るスライド式ダブルルーメンカテーテルの変更態様を示す要部拡大縦断面図である。It is a principal part expanded longitudinal cross-sectional view which shows the change aspect of the slide type double lumen catheter which concerns on this invention. 本発明に係るスライド式ダブルルーメンカテーテルの他の変更態様を示す要部拡大縦断面図である。It is a principal part expanded longitudinal cross-sectional view which shows the other change aspect of the slide type double lumen catheter which concerns on this invention. 図６のVII−VII線に沿う拡大横断面図である。FIG. 7 is an enlarged cross-sectional view taken along line VII-VII in FIG. 6. 本発明に係るスライド式ダブルルーメンカテーテルの更に他の変更態様を示す要部斜視図である。It is a principal part perspective view which shows the further another modified aspect of the slide type double lumen catheter which concerns on this invention. 本発明に係るスライド式ダブルルーメンカテーテルの更に他の変更態様を示す要部斜視図である。It is a principal part perspective view which shows the further another modified aspect of the slide type double lumen catheter which concerns on this invention. 本発明に係るスライド式ダブルルーメンカテーテルの更に他の変更態様を示す要部拡大縦断面図である。It is a principal part expanded longitudinal cross-sectional view which shows the further another change aspect of the slide type double lumen catheter which concerns on this invention. 従来の非スライド式ダブルルーメンカテーテルの使用状態を示す斜視図である。It is a perspective view which shows the use condition of the conventional non-sliding type double lumen catheter.

符号の説明Explanation of symbols

１ スライド式ダブルルーメンカテーテル
２ 外筒
３ 内筒
４ 拡径部
５ 係止部
６ 被係止部
Ｘ 流路用間隙

DESCRIPTION OF SYMBOLS 1 Sliding double lumen catheter 2 Outer cylinder 3 Inner cylinder 4 Expanded diameter part 5 Locking part 6 Locked part X Channel gap

Claims (5)

外筒と、該外筒内にスライド可能に挿入されて該外筒内壁との間に流路用間隙を画成する内筒と、前記内筒の先端部に設けられて該内筒を前記外筒に引き込むことにより前記流路用間隙を塞ぐ拡径部と、該内筒の外周面に設けられた係止部と、前記外筒の内周面に設けられて前記係止部が係止する被係止部と、を有し、前記係止部は、前記流路用間隙の流路を確保するための通路が形成され、且つ、前記内筒を前記外筒から所定長さ押し出したときに前記外筒の被係止部に係止するように構成されていることを特徴とするスライド式ダブルルーメンカテーテル。 An outer cylinder, an inner cylinder that is slidably inserted into the outer cylinder and defines a flow passage gap between the outer cylinder and an inner wall of the outer cylinder, and is provided at a distal end portion of the inner cylinder. The diameter-enlarged portion that closes the gap for the flow path by being drawn into the outer cylinder, the engaging portion provided on the outer peripheral surface of the inner cylinder, and the engaging portion provided on the inner peripheral surface of the outer cylinder. A locking portion that is secured, and the locking portion is formed with a passage for securing the flow passage of the flow passage gap, and the inner cylinder is pushed out from the outer cylinder by a predetermined length. The slide type double lumen catheter is configured so as to be locked to the locked portion of the outer cylinder. 前記被係止部は、前記外筒の先端部を先窄まり状にして該外筒先端部の内径を縮径することにより形成されていることを特徴とする請求項１記載のスライド式ダブルルーメンカテーテル。 2. The sliding double according to claim 1, wherein the locked portion is formed by constricting a tip end portion of the outer cylinder so as to reduce an inner diameter of the outer cylinder tip portion. Lumen catheter. 前記係止部は、前記内筒の外周面に放射状に突出していることを特徴とする請求項１記載のスライド式ダブルルーメンカテーテル。 The sliding double-lumen catheter according to claim 1, wherein the locking portions protrude radially from the outer peripheral surface of the inner cylinder. 前記係止部が、前記内筒の長さ方向に沿って延びることを特徴とする請求項１記載のスライド式ダブルルーメンカテーテル。 The sliding double lumen catheter according to claim 1, wherein the locking portion extends along a length direction of the inner cylinder. 外筒と、該外筒内にスライド可能に挿入されて該外筒内壁との間に流路用間隙を画成する内筒と、前記内筒の先端部に設けられて該内筒を前記外筒に引き込むことにより前記流路用間隙を塞ぐ拡径部と、を有し、前記外筒からの前記内筒の押し出し長さを所定長さに制限するように前記外筒と前記拡径部とを糸状部材により連結したことを特徴とするスライド式ダブルルーメンカテーテル。

An outer cylinder, an inner cylinder that is slidably inserted into the outer cylinder and defines a flow passage gap between the outer cylinder and an inner wall of the outer cylinder, and is provided at a distal end portion of the inner cylinder. A diameter-enlarged portion that closes the gap for the flow path by being drawn into the outer cylinder, and the outer cylinder and the diameter-expanded so as to limit the extrusion length of the inner cylinder from the outer cylinder to a predetermined length. A sliding double-lumen catheter characterized in that the parts are connected by a thread-like member.

JP2005374192A 2005-12-27 2005-12-27 Sliding double-lumen catheter Withdrawn JP2007175120A (en)

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Application Number Priority Date Filing Date Title
JP2005374192A JP2007175120A (en) 2005-12-27 2005-12-27 Sliding double-lumen catheter

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011522591A (en) * 2008-06-04 2011-08-04 ウィリアム・エイ・クック・オーストラリア・プロプライエタリー・リミテッド Introducer
JP2014104179A (en) * 2012-11-28 2014-06-09 Asahi Intecc Co Ltd Suction catheter, and suction catheter assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011522591A (en) * 2008-06-04 2011-08-04 ウィリアム・エイ・クック・オーストラリア・プロプライエタリー・リミテッド Introducer
JP2014104179A (en) * 2012-11-28 2014-06-09 Asahi Intecc Co Ltd Suction catheter, and suction catheter assembly

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