JP2001137350A - Hemodialysis catheter - Google Patents

Hemodialysis catheter

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Publication number
JP2001137350A
JP2001137350A JP36319999A JP36319999A JP2001137350A JP 2001137350 A JP2001137350 A JP 2001137350A JP 36319999 A JP36319999 A JP 36319999A JP 36319999 A JP36319999 A JP 36319999A JP 2001137350 A JP2001137350 A JP 2001137350A
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JP
Japan
Prior art keywords
blood
opening
catheter
provided
distal end
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
Application number
JP36319999A
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Japanese (ja)
Inventor
Akio Kawamura
Kazuo Kukida
Motoki Yonekawa
和丘 久木田
明夫 川村
元樹 米川
Original Assignee
Akio Kawamura
明夫 川村
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Akio Kawamura, 明夫 川村 filed Critical Akio Kawamura
Priority to JP36319999A priority Critical patent/JP2001137350A/en
Publication of JP2001137350A publication Critical patent/JP2001137350A/en
Application status is Pending legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0067Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/007Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621Extra-corporeal blood circuits
    • A61M1/3653Interfaces between patient blood circulation and extra-corporal blood circuit
    • A61M1/3659Cannulae pertaining to extracorporeal circulation
    • A61M1/3661Cannulae pertaining to extracorporeal circulation for haemodialysis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0021Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026Multi-lumen catheters with stationary elements
    • A61M25/003Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves
    • A61M2025/0031Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0021Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026Multi-lumen catheters with stationary elements
    • A61M2025/0037Multi-lumen catheters with stationary elements characterized by lumina being arranged side-by-side
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0067Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0074Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
    • A61M2025/0079Separate user-activated means, e.g. guidewires, guide tubes, balloon catheters or sheaths, for sealing off an orifice, e.g. a lumen or side holes, of a catheter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0021Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026Multi-lumen catheters with stationary elements
    • A61M25/003Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves

Abstract

PROBLEM TO BE SOLVED: To provide a hemodialysis catheter capable of preventing thrombus from generating easily and reliably when blood is not purified.
SOLUTION: A hemodialysis catheter comprises an inner cylinder 1 provided with a lumen 13 for a guide wire, a blood feeding lumen 14 communicating with the outside through a blood feeding opening 11, a blood feeding lumen 15 communicating with the outside through a blood withdrawal opening 12, and an outer cylinder 2 provided with an opening/closing means (holes 21, 22, etc.), for the blood feeding opening 11 and the blood withdrawal opening 12. When the blood feeding opening 11 and the blood withdrawal opening 12 of the inner cylinder 1 are opened by the opening/closing means, blood feeding and blood withdrawal can be carried out.
COPYRIGHT: (C)2001,JPO

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】本発明は緊急血液浄化療法などに使用される血液透析用カテーテルに関するもので、 The present invention relates not relate catheter hemodialysis used like emergency blood purification therapy,
非血液浄化時に送血ルーメンや脱血ルーメンが閉塞されるのを防止する手段を備えている。 Blood feeding lumen and the blood removal lumen during non-blood purification is provided with means for preventing from being closed.

【0002】 [0002]

【従来の技術】緊急血液浄化治療は、通常数週間に渡り、数日置きに数時間ずつ繰り返し行われる。 BACKGROUND OF THE INVENTION emergency blood purification treatment, over a period of usually a few weeks, is repeated by a few hours every few days. 従って、 Therefore,
緊急血液浄化治療に用いられる血液透析用カテーテルは、非治療時にも血管内に留置されており、そのため、 Hemodialysis catheters for use in emergency blood purification therapy, even during non-treatment are placed in the blood vessel, therefore,
送血口や脱血口から送血ルーメンや脱血ルーメンに血液が入り込み、血栓が形成されてルーメンが閉塞されることがある。 Blood enters the blood feeding port and venous ports in blood delivery lumen and the blood removal lumen may thrombus formed lumen is closed. そこで、ルーメンの閉塞を防止するため、従来、ヘパリンロック法、ヘパリン化生食持続注入法、オプチュレーター法が採用されている。 In order to prevent clogging of the lumen, conventional heparin lock method, heparinized saline infusion method, optional obturator method is adopted. ヘパリンロック法は、ルーメン内にヘパリン化生食を充填させる方法で、 Heparin lock method is a method of filling a heparinized saline into the lumen,
ルーメンをヘパリン化生食でフラッシュし、詰まりの無いことを確認してから治療を再開する。 A lumen was flushed with heparinized saline, resume treatment after confirming that there is no clogging. また、ヘパリン化生食持続注入法は、例えばバルーンなど容器に収容したヘパリン化生食の微量をルーメンに持続的に流入させて、ルーメン内に血液が流入するのを防ぐ方法である。 Moreover, heparinized saline infusion method, for example, the heparinized saline traces accommodated in a container such as a balloon continuously flowed into the lumen, the blood in the lumen is a method to prevent the inflow.
また、オプチュレーター法は、非血液浄化時に、ルーメンに細い管(オプチュレーター)を挿入し、ルーメン内に血液が流入するのを防ぐ方法である。 Moreover, options obturator method during non-blood purification, insert a thin tube (optional obturator) the lumen, blood in the lumen is a method to prevent the inflow.

【0003】しかしながら、上記のヘパリンロック法やヘパリン化生食持続注入法は、血液の流入を完全に防止できるものではなく、改善されたとは言え完全には血栓の形成を防止できるものではなく問題である。 However, the heparin lock method or heparinized saline infusion method described above, can not be completely prevented from flowing blood, the completely be said improved matter not capable of preventing the formation of thrombi is there. また、オプチュレーター法は、オプチュレーターが比較的高価である上使い捨てされるもの(ディスポ製品)であるため、経済的に問題がある。 Moreover, options obturator method are the ones option obturator is disposable on a relatively expensive (disposable products), there is a problem economically.

【0004】そこで、上記のような問題を解決するものとして、非治療中におけるヘパリンロックの有効的な維持が得られるというダブルルーメンカテーテルが提案されている(特開平11−402号公報)。 [0004] Therefore, as to solve the above problems, a double lumen catheter that an effective maintenance of the heparin lock during nontherapeutic is obtained has been proposed (JP-A 11-402 JP). このものは、 The thing is,
送血腔及び送血口を有する内筒と、この内筒が挿通され、内筒との間に脱血腔を有する外筒と、外筒の基部に結合された第1の成形体と、第1の成形態の基部に嵌合され内筒の基部に結合された第2の性形体とを備えており、外筒の側壁に設けた複数のスリットを、第1の成形体と第2の成形体に設けた保持手段により開放及び閉止するようにしたことを特徴とする。 An inner cylinder having a Okuchi腔 and blood feeding port, the inner tube is inserted, an outer cylinder having a Datsuchi腔 between the inner cylinder, and a first molded body coupled to the base of the outer tube, and a second green bodies that are coupled to the base of the first fitting to the base of the formation forms together are a cylinder, a plurality of slits provided in the side wall of the outer cylinder, and a first molded body second characterized in that so as to open and close by a holding means provided on the molded body. しかしながら、この方法も、送血口側に関しては血液の流入を完全に防ぐことができないため、完全には血栓形成を防止することができるとは言えない。 However, this method, with respect to blood delivering port side can not be completely prevented inflow of blood, completely can not be said to be able to prevent thrombus formation.

【0005】 [0005]

【発明が解決しようとする課題】本発明は上記の事情に鑑みてなされたもので、非血液浄化時に簡便かつ確実に血栓形成を防止することのできる血液透析用テーテルを提供することを目的とする。 [0008] The present invention has been made in view of the above circumstances, and aims to provide a catheters for hemodialysis which can be prevented easily and reliably thrombus formation at the time of non-blood purification to.

【0006】 [0006]

【課題を解決するための手段】本発明者等は、上記の課題を解決するために鋭意検討の結果、外筒を設けて送血口および脱血口を閉鎖する方法に想到し、本発明を完成した。 Means for Solving the Problems The present inventors have, as a result of intensive studies to solve the above problems, conceive a method of closing the blood delivery port and the blood removing ports are provided an outer cylinder, the present invention It was completed. すなわち本発明は、先端と基端を有しており、先端部の側壁に送血口と脱血口が設けられるとともに、基端から先端に貫通するガイドワイアー用ルーメンと、基端からそれぞれ先端部の送血口および脱血口に貫通する送血ルーメンおよび脱血ルーメンが設けられてなる内筒と、該内筒が液密に挿着された筒体であって、先端と基端を有しており、先端部の側壁に前記送血口および脱血口を開閉する手段がそれぞれ設けられてなる前記内筒より短い外筒、を含んでなり、前期外筒の開閉手段により前記内筒の送血口および脱血口が開放されたときに、送血および脱血が可能になる血液透析用カテーテルに関する。 That is, the present invention is, each tip has a tip and a proximal end, with the blood delivering port and the blood removal opening is arranged on the side wall of the tip portion, and the guide wire lumen penetrating from the base to the tip, from the proximal end an inner cylinder that blood delivery lumen and the blood removal lumen through the blood delivery port and the blood removing ports parts is provided, the inner tube is an inserted in-cylinder body in a liquid-tight, the front end and a proximal end has been provided, it comprises a short outer tube, from the inner tube made respectively provided with means for opening and closing the blood feeding port and the blood removing ports on the side wall of the tip portion, the inside by the opening and closing means in the previous year barrel when blood delivery port and the blood removing ports of the cylinder is opened, a blood dialysis catheter allowing blood delivery and blood removal. ここで開閉手段は、外筒の先端部にそれぞれ送血口および脱血口に対応して設けられた2つの孔であっても2つのスリットであっても良く、この場合、内筒を先端側に移動させることにより、2つの孔またはスリットとそれぞれに対応する送血口および脱血口とが重なるようにしても、内筒を軸の周りに回転させることにより、2 Here opening and closing means may be a two slits be two holes which are provided corresponding to the distal end of the outer tube blood feeding port and bled port, in this case, the tip of the inner cylinder by moving to the side, even as the blood delivery opening corresponding to each two holes or slits and blood removing ports overlap, by rotating the inner cylinder around the axis, 2
つの孔またはスリットとそれぞれに対応する送血口および脱血口とが重なるようにしてもよい。 One of the holes or slits and may be the corresponding blood delivery port and the blood removing ports overlap, respectively. 開閉手段が孔の場合、外筒の先端部に孔から先端に抜ける溝を形成して、送血口および脱血口が血管によって閉鎖されないようにするのが好ましい。 If opening and closing means is a hole, by forming a groove passing the tip from the hole to the distal end of the outer tube, preferably to the blood feeding port and the blood removing ports it is not closed by the vessel. また、内筒および外筒の基端部にそれぞれ開放確認マークを設け、送血口および脱血口の開放を確認できるようにするのが好ましい。 Furthermore, each open check mark to the proximal end of the inner cylinder and the outer cylinder is provided, preferably be able to see the opening of the blood feeding port and the blood removing ports.

【0007】 [0007]

【発明の実施の形態】次に本発明の実施例について図面に基づいて説明する。 Example of the embodiment of the invention] the present invention will be described with reference to the drawings. 図1は本発明の一実施例を示す平面図であり、図2〜図5は本発明の他の実施例を示す平面図、図6〜図9はそれぞれ図1〜図4の開閉手段の中心を通る面における断面図、図10は図1において内筒を先端側に移動させて送血口および脱血口を外部に開放した状態を示す図である。 Figure 1 is a plan view showing one embodiment of the present invention, a plan view showing another embodiment of FIGS. 2-5 present invention, the opening and closing means 6 to 9, respectively FIGS. 1 4 sectional view in a plane through the center, FIG. 10 is a view showing a state in which the inner tube is moved distally blood feed port and the blood removing ports open to the outside in FIG. 図1〜図9に示すように、本発明の血液透析用カテーテルは、ガイドワイヤー用ルーメン13、送血口11で外部と連通する送血ルーメン1 As shown in FIGS. 1-9, hemodialysis catheters of the present invention, guide wire lumen 13, the blood delivering lumen 1 which communicates the outside with the blood feeding port 11
4、脱血口12で外部と連通する送血ルーメン15が設けられた内筒1と、先端部の側壁に送血口11および脱血口12の開閉手段(孔21、22など)がそれぞれ設けられた外筒2、を含んでなり、開閉手段により内筒1 4, blood delivering lumen 15 communicates with the outside is a cylinder 1 among provided by blood removing ports 12, (such as holes 21, 22) opening and closing means of the blood feeding port 11 and the blood removing ports 12 in the side wall of the tip portion, respectively outer cylinder 2 provided, comprises a inner cylinder 1 by opening and closing means
の送血口11および脱血口12が外部に開放されたときに、送血および脱血が可能になる。 When the blood feeding port 11 and the blood removing ports 12 are open to the outside, allowing blood delivery and blood removal.

【0008】内筒1は、通常、可撓性樹脂の例えばポリウレタンやポリエチレン、ポリプロピレン、ポリアミド、ポリエステル、フッ素樹脂(例えばポリテトラフルオロエチレンなどの材料で形成されており、先端と基端を有している。そして、先端部の側壁には送血口11と脱血口12が設けられており、基端から先端に貫通するガイドワイアー用ルーメン13と、基端から先端に向かって延びる送血ルーメン14および脱血ルーメン15が設けられ、送血ルーメン14と脱血ルーメン15はそれぞれ先端部の送血口11および脱血口12に連通している。また、送血ルーメン14および脱血ルーメン15の基端にはそれぞれ延長チューブ4、5が接続され、延長チューブ4、5の基端にはそれぞれ、血液浄化器(図示していない)の接続 [0008] inner tube 1 has usually such as polyurethane or polyethylene flexible resin, polypropylene, polyamide, polyester, fluorine resin (for example, formed of a material such as polytetrafluoroethylene, the distal and proximal and are. Then, the sidewall of the tip portion is provided with the blood feeding port 11 and the blood removing ports 12, the guide wire lumen 13 penetrating from a proximal end to a distal end, extending from the proximal end to the distal blood delivery lumen 14 and blood removal lumen 15 is provided, the blood delivering lumen 14 and blood removal lumen 15 is in communication with the blood feeding port 11 and the blood removing ports 12 of each tip. Further, the blood feed lumen 14 and blood removal lumen the proximal end 15 is respectively extended tube 4, 5 connected respectively to the proximal end of the extension tube 4, 5, connection of the blood purifier (not shown) ューブ等を接続するコネクター4 Connector 4 that connects the cube, etc.
1、42が設けられている。 1,42 is provided.

【0009】外筒2は、通常、内筒1と同様の材料で形成された筒体であり、先端と基端を有している。 [0009] the outer tube 2 is typically a cylindrical body formed of the same material as the inner cylinder 1, and a tip and a proximal end. 外筒2 The outer tube 2
にはこれより長い内筒1が液密に挿着されており、その先端部の側壁には内筒1の送血口11および脱血口12 And the inner tube 1 is longer than this is inserted in a liquid tight manner to, the blood feeding port 11 and the blood removing ports 12 of the inner cylinder 1 on the side wall of the tip portion
を開閉する手段がそれぞれ設けられている。 Means for opening and closing are provided, respectively. そして外筒2の開閉手段により内筒1の送血口11および脱血口1 The blood feeding port 11 and the blood removing ports 1 of the inner cylinder 1 by opening and closing means of the outer tube 2
2が外部に開放されたときに、送血および脱血が可能になる。 When 2 is open to the outside, allowing blood delivery and blood removal. ここで、内筒1および外筒2の基端部にそれぞれ重なり確認マーク16、25を設けておけば、マーク1 Here, if the check marks 16 and 25 overlap each base end portion of the inner cylinder 1 and the outer tube 2 is provided, mark 1
6とマーク25の位置を合わせることにより、送血口1 By aligning the 6 and the mark 25, the blood feeding port 1
1および脱血口12の外部開放を自動的に確認することができる。 1 and an external opening of the blood removing ports 12 can be automatically identified. 例えば、図1において、マーク16とマーク25の先端同士が衝合する位置まで内筒1を先端側に移動させれば、図10に示すように、第1の孔21と送血口11とが重なり第2の孔22と脱血口12とが重なって、送血口11および脱血口12が外部に開放され、送血および脱血が可能になる。 For example, in FIG. 1, it is moved to the inner cylinder 1 to the distal end side to a position where tips of the mark 16 and the mark 25 abuts, as shown in FIG. 10, the first hole 21 and the blood feeding port 11 is superimposed overlapping the second hole 22 and the blood removing ports 12, the blood feeding port 11 and the blood removing ports 12 are open to the outside, allowing blood delivery and blood removal. 尚、図中、3はカテーテルを皮膚に固定するための翼であり、外筒2に固定してあっても回動自在に挿着してあってもよい。 In the figure, 3 is a wing for securing the catheter to the skin, may be each other by inserting freely be rotated each other and fixed to the outer tube 2.

【0010】開閉手段は、外筒2の先端部にそれぞれ送血口11および脱血口12に対応して設けられた2つの孔21、22であっても、2つのスリット23、24であっても良い。 [0010] closing means, be two holes 21 and 22 provided corresponding to each of the distal end portion of the outer tube 2 the blood feeding port 11 and the blood removing ports 12, meet the two slits 23 and 24 and it may be. 開閉手段により送血口11および脱血口12を外部に開放する方法としては、内筒1を先端側に移動させることにより(外筒2を基端側に移動させてもよい)、2つの孔21、22またはスリット23、24 As a method of opening the blood feeding port 11 and the blood removing ports 12 to the outside by opening and closing means, by moving the inner cylinder 1 on the tip side (the outer tube 2 may be moved proximally), the two holes 21 and 22 or slits 23 and 24
と、それぞれに対応する送血口11および脱血口12とが重なるようにする方法と、内筒1を軸の周りに回転させることにより(外筒2を回転させてもよい)、2つの孔21、22またはスリット23、24と、それぞれに対応する送血口11および脱血口12とが重なるようにする方法が採用できる。 When, how to make the blood feeding port 11 and the blood removing ports 12 corresponding overlap each (may be rotated outer cylinder 2) by rotating the inner cylinder 1 about the axis, the two the holes 21 and 22 or slits 23 and 24, how to make the blood feeding port 11 and the blood removing ports 12 corresponding overlap each can be employed.

【0011】図1(図6)および図2(図7)に示すものは、内筒1の先端部外壁に軸対称に送血口11と脱血口が設けられるとともに、外筒2の先端部に軸対称に第1の孔21と第2の孔22が設けられたものである。 [0011] Figure 1 to that shown in (Fig. 6) and 2 (7), together with the blood feeding port 11 and the blood removal opening is arranged axially symmetrically to the distal end portion outer wall of the inner cylinder 1, the outer tube 2 tip axially symmetrical parts in which the first hole 21 is a second hole 22 provided. 図1に示すものは、内筒1を先端側に移動させることにより、第1の孔21と送血口11とが重なり、第2の孔2 That shown in Figure 1, by moving the inner cylinder 1 to the distal end side, a first hole 21 and the blood feeding port 11 overlap, the second hole 2
2と脱血口12とが重なって、送血口12および脱血口12が外部に開放するようにしたものであり、図2に示すもは、内筒1を先端側に移動させることにより第1の孔21と送血口11とが重なり、第2の孔22と脱血口12とが重なって、送血口12および脱血口12が開放するようにしたものである。 It overlaps and 2 and the blood removing ports 12, which blood feeding port 12 and the blood removing ports 12 so as to open to the outside, also shown in Figure 2, by moving the inner cylinder 1 to the distal end side overlapping the first hole 21 and the blood feeding port 11, overlaps the second hole 22 and the blood removing ports 12, in which the blood feeding port 12 and the blood removing ports 12 so as to open. ここで、開閉手段が孔2 Here, the opening and closing means holes 2
1、22の場合には、図5に示すように、外筒2の先端部に孔21、22から先端に抜ける溝211、221を形成して、送血口11および脱血口12が血管によって閉鎖されないようにするのが好ましい また、図3(図8)および図4(図9)に示すものは、 In the case of 1, 22, as shown in FIG. 5, to form a groove 211, 221 to exit from the holes 21 and 22 at the distal end to the distal end of the outer tube 2, the blood feeding port 11 and the blood removing ports 12 vessels also it is preferable to not be blocked by, as shown in FIG. 3 (8) and 4 (Fig. 9)
内筒1の先端部外壁に軸対称に送血口11と脱血口が設けられるとともに、外筒2の先端部に軸対称に第1のスリット23と第2のスリット24が設けられたもので、 With the axisymmetric blood feeding port 11 and the blood removal opening is arranged in the distal end portion outer wall of the inner cylinder 1, which first slits 23 and second slits 24 axisymmetrically the tip of the outer tube 2 is provided so,
第1および第2のスリット23、24が先端側に開いているため、それぞれスリット23、24の中に開放される送血口11および脱血口12は血管によって閉鎖されることがない。 Since the first and second slits 23 and 24 are open on the front end side, the blood feeding port 11 and the blood removing ports 12 are opened in the slit 23 and 24 will not be closed by the vessel. 図3は内筒1を先端側に移動させることにより、第1のスリット23と送血口11とが重なり、 3 by moving the inner cylinder 1 to the distal end side, overlaps the first slit 23 and the blood feeding port 11,
第2のスリット24と脱血口12とが重なって、送血口12および脱血口12が開放するようにしたものであり、図4に示すもは、内筒1を先端側に移動させることにより、第1のスリット23と送血口12とが重なり、 Overlapping a second slit 24 and blood removing ports 12, which blood feeding port 12 and the blood removing ports 12 so as to open, also moves the inner cylinder 1 to the front end side shown in FIG. 4 it allows overlapping a first slit 23 and the blood feeding port 12,
第2のスリット24と脱血口12とが重なって、送血口11および脱血口12が外部に開放するようにしたものである。 Overlapping a second slit 24 and blood removing ports 12, in which the blood feeding port 11 and the blood removing ports 12 so as to open to the outside.

【0012】 [0012]

【発明の効果】以上説明してきたことから明らかなように、本発明の血液透析用カテーテルを採用することにより、内筒を先端側に移動させたり、軸の周りに回転させるだけの簡単な操作で、外筒により送血口および脱血口を外部に開放したり閉鎖したりすることができるので、 As it is clear from what has been described in the foregoing, by employing a catheter for hemodialysis of the present invention, or to move the inner tube distally, simple operation of only rotating about an axis in, it is possible to opens and closes the blood feeding port and the blood removing ports to the outside by the outer cylinder,
非血液浄化時に送血口および脱血口を閉鎖することにより、簡便かつ確実に血栓形成を防止することができる。 By closing the blood delivery port and the blood removing ports during non blood purification, it is possible to prevent easily and reliably thrombus formation.

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

【図1】 本発明の一実施例を示す平面図である。 1 is a plan view showing an embodiment of the present invention.

【図2】 本発明の他の実施例を示す平面図である。 2 is a plan view showing another embodiment of the present invention.

【図3】 本発明の他の実施例を示す平面図である。 3 is a plan view showing another embodiment of the present invention.

【図4】 本発明の他の実施例を示す平面図である。 4 is a plan view showing another embodiment of the present invention.

【図5】 本発明の他の実施例を示す平面図である。 5 is a plan view showing another embodiment of the present invention.

【図6】 図1の開閉手段の中心を通る面における断面図である。 6 is a cross-sectional view in a plane through the center of the opening and closing means of Figure 1.

【図7】 図2の開閉手段の中心を通る面における断面図である。 7 is a cross-sectional view in a plane through the center of the opening and closing means of Figure 2.

【図8】 図3の開閉手段の中心を通る面における断面図である。 8 is a cross-sectional view in a plane through the center of the opening and closing means of Figure 3.

【図9】 図4の開閉手段の中心を通る面における断面図である。 9 is a cross-sectional view in a plane through the center of the opening and closing means of Figure 4.

【図10】 図1において内筒を先端側に移動させて送血口および脱血口を外部に開放した状態を示す図である。 10 is a diagram showing a state where the inner cylinder is moved distally blood feed port and the blood removing ports open to the outside in FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 内筒 11 送血口 12 脱血口 13 ガイドワイアー用ルーメン 14 送血ルーメン 15 脱血ルーメン 16 開放確認マーク 2 外筒 21 第1の孔 211 溝 22 第2の孔 221 溝 23 第1のスリット 24 第2のスリット 25 開放確認マーク 3 翼 4 延長チューブ 41 コネクター 5 延長チューブ 51 コネクター 1 inner cylinder 11 the blood feeding port 12 blood removing ports 13 guide wire lumen 14 blood feed lumen 15 blood removal lumen 16 opened confirmation mark 2 outer cylinder 21 first hole 211 a groove 22 second hole 221 groove 23 first slit 24 second slit 25 opens check mark 3 blade 4 extension tube 41 connector 5 extension tube 51 connector

Claims (9)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 先端と基端を有しており、先端部の側壁に送血口と脱血口が設けられるとともに、基端から先端に貫通するガイドワイアー用ルーメンと、基端からそれぞれ先端部の送血口および脱血口に貫通する送血ルーメンおよび脱血ルーメンが設けられてなる内筒と、該内筒が液密に挿着された筒体であって、先端と基端を有しており、先端部の側壁に前記送血口および脱血口を開閉する手段がそれぞれ設けられてなる前記内筒より短い外筒、を含んでなり、前期外筒の開閉手段により前記内筒の送血口および脱血口が外部に開放されたときに、送血および脱血が可能になる血液透析用カテーテル。 1. A has a tip and a proximal end, with the blood delivering port and venous ports in the side wall of the tip portion is provided, the guide wire lumen penetrating from a proximal end to a distal end, each distal end from the proximal end an inner cylinder that blood delivery lumen and the blood removal lumen through the blood delivery port and the blood removing ports parts is provided, the inner tube is an inserted in-cylinder body in a liquid-tight, the front end and a proximal end has been provided, it comprises a short outer tube, from the inner tube made respectively provided with means for opening and closing the blood feeding port and the blood removing ports on the side wall of the tip portion, the inside by the opening and closing means in the previous year barrel when blood delivery port and the blood removing ports of the cylinder is opened to the outside, a catheter for blood dialysis allows the blood delivery and blood removal.
  2. 【請求項2】 開閉手段が、外筒の先端部にそれぞれ送血口および脱血口に対応して設けられた2つの孔である請求項1に記載の血液透析用カテーテル。 Wherein opening and closing means, a catheter for hemodialysis according to claim 1 are two holes formed in correspondence with the distal end of the outer tube blood feeding port and the blood removal opening.
  3. 【請求項3】 内筒を先端側に移動させることにより、 By moving the distal end side wherein the inner tube,
    2つの孔とそれぞれに対応する送血口および脱血口とが重なるようにしてなる請求項2に記載の血液透析用カテーテル。 Two holes and catheter hemodialysis according to claim 2 comprising as the corresponding blood delivery port and the blood removing ports overlap, respectively.
  4. 【請求項4】 内筒を軸の周りに回転させることにより、2つの孔とそれぞれに対応する送血口および脱血口とが重なるようにしてなる請求項2に記載の血液透析用カテーテル。 By rotating around the wherein the tubular shaft, two holes and catheter hemodialysis according to claim 2 comprising as the corresponding blood delivery port and the blood removing ports overlap, respectively.
  5. 【請求項5】 外筒の先端部に孔から先端に抜ける溝が形成されてなる請求項3または4に記載の血液透析用カテーテル。 5. A catheter for blood dialysis according to claim 3 or 4 grooves passing the tip from the hole to the distal end of the outer cylinder is formed.
  6. 【請求項6】 開閉手段が、外筒の先端部にそれぞれ送血口および脱血口に対応して設けられたスリットである請求項1に記載の血液透析用カテーテル。 Wherein opening and closing means, a catheter for hemodialysis according to claim 1, wherein the slits provided in correspondence with the distal end of the outer tube blood feeding port and the blood removal opening.
  7. 【請求項7】 内筒を先端側に移動させることにより、 By moving the distal end side 7. inner tube,
    2つのスリットの中にそれぞれに対応する送血口および脱血口が開放されるようにしてなる請求項6に記載の血液透析用カテーテル。 Two catheters for hemodialysis according to claim 6 which is formed by a correspondingly blood delivery opening and to each blood removing ports are opened into the slit.
  8. 【請求項8】 内筒を軸の周りに回転させることにより、2つのスリットの中にそれぞれに対応する送血口および脱血口が開放されるようにしてなる請求項6に記載の血液透析用カテーテル。 By rotating the 8. inner tube about the axis, hemodialysis according to claim 6, the blood feed port and the blood removing ports becomes so as to be opened corresponding to each in two slits use catheter.
  9. 【請求項9】 内筒および外筒の基端部にそれぞれ開放確認マークを設け、送血口および脱血口の開放を確認できるようにした請求項2〜8に記載の血液透析用カテーテル。 9. the cylinder and provided with a respective open check mark in the proximal portion of the outer tube, the catheter for blood dialysis according to claim 2-8 which is able to see the opening of the blood feeding port and the blood removing ports.
JP36319999A 1999-11-15 1999-11-15 Hemodialysis catheter Pending JP2001137350A (en)

Priority Applications (1)

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