JPH09276410A - Triple lumen catheter - Google Patents
Triple lumen catheterInfo
- Publication number
- JPH09276410A JPH09276410A JP8089098A JP8909896A JPH09276410A JP H09276410 A JPH09276410 A JP H09276410A JP 8089098 A JP8089098 A JP 8089098A JP 8909896 A JP8909896 A JP 8909896A JP H09276410 A JPH09276410 A JP H09276410A
- Authority
- JP
- Japan
- Prior art keywords
- lumen
- lumens
- triple
- tip
- catheter
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3653—Interfaces between patient blood circulation and extra-corporal blood circuit
- A61M1/3659—Cannulae pertaining to extracorporeal circulation
- A61M1/3661—Cannulae pertaining to extracorporeal circulation for haemodialysis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/28—Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
- A61M1/285—Catheters therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M25/003—Multi-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
- A61M2025/0031—Multi-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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
- A61M25/0032—Multi-lumen catheters with stationary elements characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、血液透析、一時的
な輸液または中心静脈圧力（以下、ＣＶＰという）の監
視などに使用されるトリプルルーメン（多重ルメーン）
カテーテルに係り、さらに詳しくは、血液透析時におい
て特に脱血が円滑に行えるトリプルルーメンカテーテル
の構造に関するものである。TECHNICAL FIELD The present invention relates to a triple lumen (multilumen) used for hemodialysis, temporary infusion or monitoring of central venous pressure (hereinafter referred to as CVP).
The present invention relates to a catheter, and more particularly, to a structure of a triple-lumen catheter that can smoothly remove blood during hemodialysis.
【０００２】[0002]
【従来の技術】血液透析などに使用されるトリプルルー
メンカテーテルの一例として、特開平２−２０９１５９
号公報、特公平１−２３１４２号公報および米国特許第
５，２２１，２５６号公報に開示された発明がある。2. Description of the Related Art As an example of a triple-lumen catheter used for hemodialysis and the like, JP-A-2-209159.
There are inventions disclosed in Japanese Patent Publication No. Hei 1-23142 and U.S. Pat. No. 5,221,256.
【０００３】特開平２−２０９１５９号公報（従来例
１）に開示されたトリプルルーメンカテーテルは、図３
（ａ）に示すように、テーパ状の先端部２１ａを有し、
３つのルーメン２２，２３，２４からなる本体２１と、
本体２１の基部に設けられ３つのルーメン２２，２３，
２４にそれぞれ連通した３本の接続チューブ（図示せ
ず）とからなっている。また、３つのルーメンのうち２
つのルーメン２２，２３は、図３（ｂ）に示すように、
本体２１の内腔を横切りかつ軸方向に設けられた隔壁２
１ｂによって形成され、図３（ａ）に示すように、両ル
ーメン２２，２３は先端部近傍の内部に設けられたイン
サート２５，２６によって先端部側が閉塞され、またイ
ンサート２５，２６の基部側のルーメン２２，２３の側
壁に複数の開口部２２ａ，２３ａを有して血液の取出し
および戻しルーメンとなり、残りのルーメン２４は、本
体２１の中心部でかつ隔壁２１ｂ内に基部から先端部ま
で貫通されて形成され、ガイドワイヤー２７が挿通され
る輸液ルーメンとなる。The triple lumen catheter disclosed in Japanese Patent Application Laid-Open No. 2-209159 (Prior Art 1) is shown in FIG.
As shown in (a), it has a tapered tip portion 21a,
A main body 21 composed of three lumens 22, 23, 24,
The three lumens 22, 23 provided at the base of the main body 21,
It is composed of three connecting tubes (not shown) which are in communication with each other. Also, 2 out of 3 lumens
The two lumens 22 and 23 are, as shown in FIG.
Partition wall 2 which is provided in the axial direction across the inner cavity of the main body 21
As shown in FIG. 3 (a), both lumens 22 and 23 are closed on the distal end side by inserts 25 and 26 provided inside the vicinity of the distal end portions, and also on the base side of the inserts 25 and 26. The side walls of the lumens 22 and 23 have a plurality of openings 22a and 23a to serve as blood extraction and return lumens, and the remaining lumen 24 is penetrated from the base to the tip in the partition wall 21b at the center of the main body 21. Is formed, and serves as an infusion lumen through which the guide wire 27 is inserted.
【０００４】このように構成されたトリプルルーメンカ
テーテル２０を用いて血液透析を行う場合、トリプルル
ーメンカテーテル２０の本体２１の輸液ルーメン２４に
挿通されたガイドワイヤー２７を用いて血管内に挿入し
て留置し、取出しルーメン２２に連通した接続チューブ
を透析回路の脱血側に接続して、戻しルーメン２３に連
通した接続チューブを透析回路の送血側に接続する。そ
して、血液透析を開始すると、血液は取出しルーメン２
２の開口部２２ａから取出しルーメン２２に流れ込んで
透析回路に送られ、透析回路からの血液は戻しルーメン
２３を通って開口部２３ａから血管内に送られる。When performing hemodialysis using the triple lumen catheter 20 thus constructed, the guide wire 27 inserted through the infusion lumen 24 of the main body 21 of the triple lumen catheter 20 is inserted into the blood vessel for indwelling. Then, the connection tube communicating with the extraction lumen 22 is connected to the blood removal side of the dialysis circuit, and the connection tube communicating with the return lumen 23 is connected to the blood supply side of the dialysis circuit. Then, when hemodialysis is started, blood is taken out and lumen 2
The blood from the dialysis circuit is sent through the return lumen 23 into the blood vessel through the opening 23a.
【０００５】また、特公平１−２３１４２号公報（従来
例２）に開示されたトリプルルーメンカテーテルは、静
脈カテーテルであり、図４に示すように、カテーテル３
０の中心部から３方に延びた内壁３０ａにより分割され
て形成された３つの独立の内腔３１，３２，３３を有
し、３つの内腔のうちの１つの内腔３１は、カテーテル
３０の先端部まで延在し、内腔３２，３３はカテーテル
３０の側壁に設けられたそれぞれの開口部３２ａ，３３
ａで終わっており、先端部側に栓３４，３５によって閉
じられている。また、３つの内腔３１，３２，３３はカ
テーテル３０の基部を越えて延長しており、それぞれの
基部には輸液装置等への結合のための内腔アダプター
（図示せず）が取付けられている。The triple lumen catheter disclosed in Japanese Examined Patent Publication No. 1-23142 (Prior Art 2) is an intravenous catheter, and as shown in FIG.
0 has three independent lumens 31, 32, 33 formed by being divided by an inner wall 30a extending in three directions from the central portion of 0, one of the three lumens 31 is a catheter 30 Extending to the distal end of the catheter, and the lumens 32 and 33 are provided in the side walls of the catheter 30, respectively.
It ends with a and is closed on the tip side by plugs 34 and 35. Also, the three lumens 31, 32, 33 extend beyond the base of the catheter 30, and a lumen adapter (not shown) is attached to each base for connection to an infusion device or the like. There is.
【０００６】そして、内腔３１に挿通されたガイドワイ
ヤーを用いてカテーテル３０を血管内に挿入して留置
し、内腔３１からガイドワイヤーを抜いた後、それぞれ
の内腔３１，３２，３３に連通した内腔アダプターに流
動物運搬装置、ＣＶＰ監視装置等を接続し、内腔３１等
より流動物投与と同時にＣＶＰを監視しかつその両方ま
たはいずれか一方と同時に患者の静脈から血液を採取す
る。[0006] Then, the catheter 30 is inserted into the blood vessel by using the guide wire inserted through the lumen 31 and left in the blood vessel, and after the guide wire is removed from the lumen 31, the catheter 30 is inserted into each of the lumens 31, 32, 33. A fluid carrier, a CVP monitor, or the like is connected to the communicating lumen adapter to monitor CVP from the lumen 31 at the same time as the fluid is administered, and blood is collected from a patient's vein at the same time as both or either of them. .
【０００７】米国特許第５，２２１，２５６号公報（従
来例３）に開示されたトリプルルーメンカテーテルは、
図５に示すように、テーパ状の先端部４１ａを有し、３
つのルーメン４２，４３，４４からなる本体４１と、本
体４１の基部に設けられ３つのルーメン４２，４３，４
４にそれぞれ連通した３本の接続チューブ（図示せず）
とからなっており、３つのルーメンのうち２つのルーメ
ン４２，４３は、本体４１の内腔を横切りかつ軸方向に
設けられた隔壁４１ｂによって形成され、ルーメン４２
は本体４１の基部から側壁に設けられた開口部４２ａま
で形成されて血液の取出しルーメンとなり、ルーメン４
３は本体４１の基部から先端開口部４１ｃまで貫通され
て形成されて血液の戻しルーメンとなり、残りのルーメ
ン４４は、本体４１の隔壁４１ｂにその一端側に片寄っ
て基部から側壁に設けられた開口部４４ａまで形成され
て輸液ルーメンとなる。The triple lumen catheter disclosed in US Pat. No. 5,221,256 (conventional example 3) is
As shown in FIG. 5, the tapered tip portion 41a has 3
A main body 41 composed of one lumen 42, 43, 44, and three lumens 42, 43, 4 provided at the base of the main body 41.
3 connecting tubes (not shown) communicating with 4 respectively
The two lumens 42 and 43 of the three lumens are formed by the partition wall 41b that is provided in the axial direction and across the inner cavity of the main body 41.
Is formed from the base of the main body 41 to the opening 42a provided in the side wall, and serves as a blood extraction lumen.
Reference numeral 3 denotes a blood return lumen formed by penetrating from the base portion of the main body 41 to the distal end opening portion 41c, and the remaining lumen 44 is an opening provided on the side wall from the base portion while being offset to one end side of the partition wall 41b of the main body 41. The infusion lumen is formed by forming the portion 44a.
【０００８】そして、輸液ルーメン４４に挿通されたガ
イドワイヤーを用いてトリプルルーメンカテーテル４０
を血管内に挿入して留置し、取出しルーメン４２および
戻しルーメン４３に連通した接続チューブを透析回路に
接続して血液透析を行うと、血液は取出しルーメン４２
の開口部４２ａから取出しルーメン４２内に流れ込んで
透析回路に送られ、透析回路からの血液は戻しルーメン
４３を通って先端開口部４１ｃから血管内に送られる。Then, the triple-lumen catheter 40 is constructed by using a guide wire inserted into the infusion lumen 44.
Is inserted and left in the blood vessel, and a connection tube communicating with the extraction lumen 42 and the return lumen 43 is connected to a dialysis circuit to perform hemodialysis.
The blood from the dialysis circuit is sent to the dialysis circuit through the return lumen 43, and is then sent from the distal end opening 41c into the blood vessel.
【０００９】[0009]
【発明が解決しようとする課題】上記のような従来例１
のトリプルルーメンカテーテル２０は、取出しルーメン
２２の開口部２２ａが、図３（ｂ）に示すように、本体
２１の側壁の上方、つまり一方向にのみ片寄って設けら
れているので、例えば血液透析を行うと、血液が取出し
ルーメン２２内に送られる力、つまり吸い込まれる力に
よって脱血側となっている開口部２２ａが血管の内壁に
近づき、内壁と本体２１との間を狭めて脱血流量不足を
発生させたり、最終的には開口部２２ａが血管の内壁に
貼り付いて塞がれ、脱血不良を発生させるなどの問題が
あった。SUMMARY OF THE INVENTION Conventional example 1 as described above
In the triple-lumen catheter 20 of FIG. 3, the opening 22a of the take-out lumen 22 is provided above the side wall of the main body 21, that is, offset in only one direction, as shown in FIG. 3 (b). When this is done, the opening 22a on the blood removal side approaches the inner wall of the blood vessel due to the force of blood being sent into the extraction lumen 22, that is, the force of being sucked in, and the space between the inner wall and the main body 21 is narrowed, resulting in insufficient blood removal. However, there is a problem in that the opening 22a is eventually stuck to the inner wall of the blood vessel and is blocked, resulting in poor blood removal.
【００１０】また、従来例２のトリプルルーメンカテー
テル３０においても、従来例１と同様に脱血側となる内
腔３２の開口部３２ａがカテーテル３０の側壁に一方向
にのみ片寄って設けられているため、脱血による吸引力
が一方向に集中して開口部３２ａを血管の内壁に貼り付
けて塞いでしまい、脱血不良等を発生させることがあっ
た。Also, in the triple lumen catheter 30 of the conventional example 2, the opening 32a of the lumen 32 on the blood removal side is provided in the side wall of the catheter 30 in one direction only, as in the conventional example 1. Therefore, the suction force due to blood removal is concentrated in one direction, and the opening 32a is stuck and blocked on the inner wall of the blood vessel, which may result in poor blood removal.
【００１１】さらに、従来例３のトリプルルーメンカテ
ーテル４０においても、血液透析の脱血は本体４１の側
壁に一方向にのみ片寄って設けられた取出しルーメン４
２の開口部４２ａによって行われるので、従来例１と同
様に脱血による吸引力によって開口部４２ａが血管の内
壁に貼り付いて塞がれ、脱血不良等を発生させることが
あった。Further, also in the triple lumen catheter 40 of the conventional example 3, the blood removal for hemodialysis is provided on the side wall of the main body 41 with the removal lumen 4 provided only in one direction.
Since the second opening portion 42a is used, the opening portion 42a may be stuck to the inner wall of the blood vessel and blocked by the suction force due to the blood removal as in the case of the conventional example 1, resulting in poor blood removal.
【００１２】本発明は、上記のような課題を解決するた
めになされたもので、脱血の吸い込み力による脱血孔の
閉塞を防止して脱血流量不足および脱血不良等を確実に
防ぐことのできる信頼性の高いトリプルルーメンカテー
テルを提供することを目的としたものである。The present invention has been made in order to solve the above problems, and prevents obstruction of the blood removal hole due to suction force of blood removal to reliably prevent insufficient blood flow and poor blood removal. It is intended to provide a reliable and highly reliable triple lumen catheter.
【００１３】[0013]
【課題を解決するための手段】本発明に係るトリプルル
ーメンカテーテルは、縮径された先端部を有し、内部に
軸方向に設けられた隔壁により形成された第１のルーメ
ンおよび第２のルーメンと、これらのルーメンに並設さ
れかつ先端部に設けた先端開口部を介して外部と連通す
るように側壁内に設けられた第３のルーメンとを備え、
第１のルーメンおよび第２のルーメンのいずれか一方の
ルーメンの側壁に対向して外部と連通する少なくとも一
対の側孔を設けるとともに、他方のルーメンの側壁に外
部と連通する側孔を設けたものである。A triple-lumen catheter according to the present invention has a first lumen and a second lumen each having a reduced diameter distal end portion and formed by a partition wall provided axially inside thereof. And a third lumen provided in the side wall so as to communicate with the outside through a tip opening provided at the tip and arranged in parallel with these lumens,
At least a pair of side holes facing the side wall of one of the first lumen and the second lumen and communicating with the outside, and a side hole communicating with the outside on the side wall of the other lumen Is.
【００１４】また、本発明に係るトリプルルーメンカテ
ーテルは、第１のルーメンと第２のルーメンとの間にい
ずれか一方のルーメンの断面積が他方のルーメンの断面
積より大きくなるように隔壁を設けるとともに、対向し
て設けられた少なくとも一対の側孔を断面積の大きいル
ーメンに設けたものである。In the triple-lumen catheter according to the present invention, a partition wall is provided between the first lumen and the second lumen so that the cross-sectional area of one of the lumens is larger than the cross-sectional area of the other lumen. At the same time, at least a pair of side holes provided to face each other are provided in the lumen having a large cross-sectional area.
【００１５】さらに、本発明に係るトリプルルーメンカ
テーテルは、第１のルーメンまたは第２のルーメンのい
ずれか一方のルーメンの内壁の隔壁に対向する位置に隔
壁側に突出する肉厚部を形成し、この肉厚部に第３のル
ーメンを設けたものである。Further, in the triple lumen catheter according to the present invention, a thick portion projecting toward the partition wall is formed at a position facing the partition wall of the inner wall of either the first lumen or the second lumen, A third lumen is provided in this thick portion.
【００１６】また、本発明に係るトリプルルーメンカテ
ーテルは、基部側が拡径された截頭円すい状の頭部と、
頭部の基部から第１および第２のルーメンの側孔の先端
部近傍まで延設されてこれらルーメンの先端側を閉塞す
る２つの延長部と、第３のルーメンの先端部に連接され
頭部の円すい面に沿ってこの頭部に設けた先端開口部ま
で形成された連通孔とからなるソフトチップを備え、こ
のソフトチップの延長部を第１および第２のルーメンに
嵌入して結合し、第３のルーメンを連通孔に連通させて
カテーテルの先端部を構成したものである。The triple-lumen catheter according to the present invention further comprises a truncated conical head having an enlarged diameter on the base side.
Two extension parts that extend from the base part of the head part to the vicinity of the tip parts of the side holes of the first and second lumens and close the tip parts of these lumens, and the head part that is connected to the tip parts of the third lumen parts A soft tip consisting of a communicating hole formed along the conical surface of the head up to the tip opening provided in the head, and the extended portion of the soft tip is fitted into the first and second lumens to be joined, The third lumen communicates with the communication hole to form the distal end portion of the catheter.
【００１７】このように、第１のルーメンおよび第２の
ルーメンのいずれか一方のルーメンの断面積を他方のル
ーメンの断面積をより大きくし、この断面積の大きいル
ーメンの側壁に対向して外部と連通する少なくとも一対
の側孔を設けることにより、一対の側孔が設けられたル
ーメンを脱血用ルーメンとして血液透析を行うと、血液
の吸い込み力が一方向に集中することなく両方向にかか
って脱血が行われ、側孔の血管内壁への接近および血管
内壁による閉塞が防止されて脱血流量不足および脱血不
良の発生を防ぐとともに、脱血流量の多い安定した血液
透析を行うことができる。Thus, the cross-sectional area of one of the first lumen and the second lumen is made larger than the cross-sectional area of the other lumen, and the lumen having the larger cross-sectional area faces the side wall to the outside. By performing at least one pair of side holes communicating with the lumen, and performing hemodialysis with the lumen provided with the pair of side holes as a blood removal lumen, the blood suction force is applied in both directions without being concentrated in one direction. Blood removal is performed to prevent the side hole from approaching the inner wall of the blood vessel and blocking the inner wall of the blood vessel to prevent insufficient blood removal and poor blood removal, and to perform stable hemodialysis with large blood removal. it can.
【００１８】[0018]
【発明の実施の形態】図１は本発明の実施形態の模式
図、そのＡ−Ａ断面図およびＢ−Ｂ断面図、図２は図１
の要部の拡大断面図である。図において、１はトリプル
ルーメンカテーテルで、例えばポリウレタンなどの合成
樹脂材料からなり３つのルーメン６，７，８を有する円
筒状の本体２と、例えばポリウレタンなどの合成樹脂材
料からなりトリプルルーメンカテーテル１の先端部を構
成するソフトチップ３と、例えばポリウレタンなどの合
成樹脂材料からなり透析回路などに接続される接続チュ
ーブ５ａ等を備えて本体２の基部に一体的に結合された
接続部４とによって構成されている。1 is a schematic view of an embodiment of the present invention, its AA sectional view and BB sectional view, and FIG. 2 is FIG.
It is an expanded sectional view of the principal part of. In the figure, reference numeral 1 denotes a triple-lumen catheter, which comprises a cylindrical main body 2 made of a synthetic resin material such as polyurethane and having three lumens 6, 7 and 8, and a triple-lumen catheter 1 made of a synthetic resin material such as polyurethane. Consists of a soft tip 3 that constitutes the tip portion and a connection portion 4 that is made of a synthetic resin material such as polyurethane and that is provided with a connection tube 5a that is connected to a dialysis circuit and that is integrally coupled to the base portion of the main body 2. Has been done.
【００１９】トリプルルーメンカテーテル１の本体２
は、図１（ｂ），（ｃ）に示すように、内部に中央より
下方でかつ軸方向に隔壁２ａが設けられ、この隔壁２ａ
によって断面ほぼ半円形状の２つのルーメン６，７が形
成されており、一方のルーメン６は本体２の円弧状の側
壁の先端部側に外部と連通する側孔６ａが設けられた血
液透析の送血用ルーメンであり、他方のルーメン７はル
ーメン６の断面積より大きい断面積を有し、ルーメン６
の側孔６ａより基部側でかつ本体２の円弧状の側壁に対
向して外部と連通する少なくとも一対の側孔７ａが設け
られた血液透析の脱血用ルーメンである。そして、ルー
メン７の内壁の隔壁２ａに対向する位置には隔壁２ａ側
に突出した凸部７ｂを有して本体２の側壁を肉厚に形成
しており、この肉厚部２ｂには内径がガイドワイヤー
（図示せず）の外径とほぼ等しい断面円形状のルーメン
８が形成されていて、ルーメン８は輸液およびＣＶＰの
監視などを行う輸液ルーメンである。また、本体２の基
部にはルーメン６，７，８にそれぞれ連通する第１、第
２および第３の接続チューブ５ａ，５ｂ，５ｃが接続部
４を介して連結されている。Main body 2 of triple lumen catheter 1
As shown in FIGS. 1 (b) and 1 (c), a partition wall 2a is provided in the lower part of the center and in the axial direction.
Has two lumens 6 and 7 having a substantially semicircular cross section, and one of the lumens 6 has a side hole 6a communicating with the outside at the distal end side of the arc-shaped side wall of the main body 2 for hemodialysis. The lumen 7 is a blood-sending lumen, and the other lumen 7 has a cross-sectional area larger than that of the lumen 6.
The blood removal lumen for hemodialysis is provided with at least a pair of side holes 7a which are on the base side of the side holes 6a and face the arcuate side wall of the main body 2 and communicate with the outside. The inner wall of the lumen 7 has a convex portion 7b projecting toward the partition wall 2a at a position facing the partition wall 2a to form a thick side wall of the main body 2, and the thick wall portion 2b has an inner diameter. A lumen 8 having a circular cross-section that is approximately equal to the outer diameter of a guide wire (not shown) is formed, and the lumen 8 is an infusion lumen for performing infusion and monitoring of CVP. Further, first, second and third connection tubes 5 a, 5 b and 5 c, which communicate with the lumens 6, 7 and 8, respectively, are connected to the base portion of the main body 2 via the connection portion 4.
【００２０】ソフトチップ３は、図２に示すように、基
部側が拡径された截頭円すい状の頭部３ａと、頭部３ａ
の基部からルーメン６，７の側孔６ａ，７ａの先端部近
傍まで延設されかつそれぞれのルーメン６，７の断面形
状と同形状に形成された延長部３ｂ，３ｃとを備え、延
長部３ｂ，３ｃをルーメン６，７に嵌入してルーメン
６，７の先端側を閉塞するとともに、頭部３ａを本体２
の先端部側に一体的に結合し、トリプルルーメンカテー
テル１の先端部を構成している。また、頭部３ａにはル
ーメン８の内径とほぼ同径でルーメン８の先端部に連接
され頭部３ａに設けた先端開口部３ｄまで頭部３ａの外
壁に沿って形成された連通孔９が設けられており、ソフ
トチップ３を本体２の先端部側に結合させることによっ
てルーメン８は連通孔９に連通される。As shown in FIG. 2, the soft tip 3 has a frustoconical head portion 3a having a base portion whose diameter is expanded and a head portion 3a.
From the base portion of the lumens 6 and 7 to the vicinity of the tips of the side holes 6a and 7a of the lumens 6 and 7, and the extension portions 3b and 3c formed in the same shape as the cross-sectional shape of the lumens 6 and 7, respectively. , 3c are fitted into the lumens 6 and 7 to close the distal ends of the lumens 6 and 7, and the head 3a is attached to the main body 2
Is integrally connected to the distal end side of the triple lumen catheter 1 to form the distal end of the triple lumen catheter 1. Further, a communication hole 9 is formed in the head portion 3a and has a diameter substantially the same as the inner diameter of the lumen 8 and is formed along the outer wall of the head portion 3a up to the tip opening portion 3d which is connected to the tip portion of the lumen 8 and is provided in the head portion 3a. The lumen 8 is provided in the communication hole 9 by connecting the soft tip 3 to the tip of the main body 2.
【００２１】第１および第２の接続チューブ５ａ，５ｂ
は、図１（ａ）に示すように、端部に透析回路のコネク
ターと接続されるコネクター１０ｂを有する例えばシリ
コンまたはポリウレタンなどの軟質の合成樹脂材料から
なる柔管部１０ａと、この柔管部１０ａを締め付けて閉
塞するクランプ１０ｃとから構成されており、第３の接
続チューブ５ｃは、輸液回路等のコネクターと接続され
るコネクター１１ｂを有する例えばシリコンまたはポリ
ウレタンなどの軟質の合成樹脂材料からなる柔管部１１
ａと、この柔管部１０ａを締め付けて閉塞するクランプ
１１ｃとから構成されている。First and second connecting tubes 5a, 5b
As shown in FIG. 1 (a), a flexible tube portion 10a made of a soft synthetic resin material such as silicon or polyurethane having a connector 10b connected to a connector of a dialysis circuit at an end, and the flexible tube portion 10a. The third connecting tube 5c is made of a soft synthetic resin material such as silicone or polyurethane having a connector 11b connected to a connector such as an infusion circuit. Pipe part 11
a and a clamp 11c that closes and closes the soft tube portion 10a.
【００２２】このように構成されたこの実施形態におい
ては、血液透析を行う場合、血管内に挿入されているガ
イドワイヤーをトリプルルーメンカテーテル１のソフト
チップ３の先端開口部３ｄから連通孔９およびルーメン
８に挿通させ、このガイドワイヤー等を用いてトリプル
ルーメンカテーテル１を血管内に挿入し、留置する。つ
いで、ガイドワイヤーをルーメン８等から抜いて第３の
接続チューブ５ｃのクランプ１１ｃで柔管部１１ａを閉
塞した後、第１の接続チューブ５ａのコネクター１０ｂ
を透析回路の送血側に接続し、第２の接続チューブ５ｂ
のコネクター１０ｂを透析回路の脱血側に接続して血液
透析を開始する。In this embodiment thus constructed, when performing hemodialysis, the guide wire inserted into the blood vessel is inserted into the communication hole 9 and the lumen from the distal end opening 3d of the soft tip 3 of the triple lumen catheter 1. 8 and the triple lumen catheter 1 is inserted into the blood vessel using this guide wire or the like and left indwelling. Then, after pulling out the guide wire from the lumen 8 or the like and closing the soft tube portion 11a with the clamp 11c of the third connecting tube 5c, the connector 10b of the first connecting tube 5a is closed.
Is connected to the blood supply side of the dialysis circuit, and the second connection tube 5b
The connector 10b is connected to the blood removal side of the dialysis circuit to start hemodialysis.
【００２３】血液透析が開始されると、血液はルーメン
７に連通している側孔７ａからルーメン７に流れ込んで
透析回路に送られ、透析回路からの血液はルーメン６を
通ってルーメン６に連通している側孔６ａから血管内に
送られる。この時、血液は本体２の側壁に対向して設け
られている少なくとも一対の側孔７ａ、つまり２方向か
らルーメン７に送られる。When hemodialysis is started, blood flows from the side hole 7a communicating with the lumen 7 into the lumen 7 and is sent to the dialysis circuit, and the blood from the dialysis circuit communicates with the lumen 6 through the lumen 6. It is sent into the blood vessel from the side hole 6a. At this time, the blood is sent to the lumen 7 from at least a pair of side holes 7a provided facing the side wall of the main body 2, that is, two directions.
【００２４】血液透析終了後、トリプルルーメンカテー
テル１を血管内に留置する場合は、第１の接続チューブ
５ａのコネクター１０ｂおよび第２の接続チューブ５ｂ
のコネクター１０ｂを透析回路から取り外し、ルーメン
６，７をヘパリン加生理食塩水でフラッシュし、ヘパリ
ンロックする。When the triple-lumen catheter 1 is left in the blood vessel after completion of hemodialysis, the connector 10b of the first connecting tube 5a and the second connecting tube 5b.
The connector 10b is removed from the dialysis circuit, and the lumens 6 and 7 are flushed with heparinized physiological saline to lock the heparin.
【００２５】このように、血液透析における脱血は、ル
ーメン７に連通し本体２の側壁に対向して設けられた少
なくとも一対の側孔７ａ、つまりルーメン７に対して２
方向に設けられた側孔７ａにより行うので、側孔７ａに
かかる血液の吸い込む力は従来のように一方向（側孔が
設けられている方向）に集中せずに両方向にかかり、本
体２を血管内のほぼ中心に安定して保持させることがで
きる。これにより、血液の吸い込む力によって側孔７ａ
が血管の内壁に近づき内壁と本体２との間を狭めて脱血
流量不足を発生させたり、側孔７ａが血管の内壁に貼り
付いて塞がれ脱血不良を発生させたりすることを防止す
ることができ、安定で確実に脱血を行うことができる信
頼性の高いトリプルルーメンカテーテル１を得ることが
できる。As described above, blood removal in hemodialysis is performed with respect to at least a pair of side holes 7a provided to the lumen 7 and facing the side wall of the main body 2, that is, to the lumen 7.
Since it is performed by the side hole 7a provided in the direction, the force of sucking blood into the side hole 7a is applied in both directions without being concentrated in one direction (the direction in which the side hole is provided) unlike the conventional case, and the main body 2 is It can be stably held at almost the center of the blood vessel. As a result, the side hole 7a is generated by the force of sucking blood.
Prevents the blood vessel from approaching the inner wall of the blood vessel and narrowing the space between the inner wall and the main body 2 to cause insufficient blood removal, or the side hole 7a sticking to the inner wall of the blood vessel to be blocked and cause poor blood removal. It is possible to obtain a highly reliable triple-lumen catheter 1 capable of performing stable and reliable blood removal.
【００２６】また、ルーメン７の断面積をルーメン６の
断面積より大きく形成したので、脱血流量を多くするこ
とができ、患者に対する負担を小さくすることができる
とともに、２方向に設けられた側孔７ａによる脱血にも
確実に対応することができ、円滑で合理的な血液透析を
行うことができる。Further, since the cross-sectional area of the lumen 7 is formed larger than that of the lumen 6, the amount of blood removed can be increased, the burden on the patient can be reduced, and the side provided in two directions. Blood removal through the hole 7a can be reliably dealt with, and smooth and rational hemodialysis can be performed.
【００２７】さらに、本体２の肉厚部２ｂにルーメン８
を形成したことにより、本体２の側壁に設けられた一対
の側孔７ａの位置関係が１８０゜に近いものとなって側
孔７ａを大きく形成することができる。これにより、脱
血流量を確保することができ、血管内壁による閉塞を防
止することができる。Furthermore, the lumen 8 is formed in the thick portion 2b of the main body 2.
By forming the above, the positional relationship between the pair of side holes 7a provided on the side wall of the main body 2 becomes close to 180 °, and the side hole 7a can be formed large. As a result, the amount of blood removed can be secured, and blockage by the inner wall of the blood vessel can be prevented.
【００２８】なお、上述の実施形態ではソフトチップ３
によりトリプルルーメンカテーテル１の先端部を構成し
た場合を説明したが、ソフトチップ３と本体２とを一体
に形成し、本体２の先端部によりトリプルルーメンカテ
ーテル１の先端部を構成するようにしてもよい。In the above embodiment, the soft chip 3 is used.
Although the case where the distal end portion of the triple lumen catheter 1 is configured is described above, the soft tip 3 and the main body 2 may be integrally formed, and the distal end portion of the main body 2 may configure the distal end portion of the triple lumen catheter 1. Good.
【００２９】[0029]
【発明の効果】以上のように本発明に係るトリプルルー
メンカテーテルは、縮径された先端部を有し、内部に軸
方向に設けられた隔壁により形成された第１のルーメン
および第２のルーメンと、これらのルーメンに並設され
かつ先端部に設けた先端開口部を介して外部と連通する
ように側壁内に設けられた第３のルーメンとを備え、第
１のルーメンおよび第２のルーメンのいずれか一方のル
ーメンの側壁に対向して外部と連通する少なくとも一対
の側孔を設けるとともに、他方のルーメンの側壁に外部
と連通する側孔を設けたので、対向して設けられた少な
くとも一対の側孔を備えたルーメンを血液透析の脱血用
ルーメンとして血液透析を行うと、血液を吸い込む力は
脱血用ルーメンの側孔に対して一方向に集中せずに両方
向にかかり、カテーテルを血管内の安定した位置に保持
することができる。これにより、脱血用ルーメンの側孔
と血管の内壁との近づきを防いで脱血流量不足の発生を
防止することができるとともに、血管の内壁による側孔
の閉塞を防いで脱血不良の発生を防止することができ、
安定で確実に脱血を行うことができる信頼性の高いトリ
プルルーメンカテーテルが得られる。As described above, the triple-lumen catheter according to the present invention has the first lumen and the second lumen each having the reduced diameter tip portion and formed by the partition wall provided inside in the axial direction. And a third lumen provided in the side wall so as to communicate with the outside through a tip opening provided in the tip and arranged in parallel with these lumens, and the first lumen and the second lumen are provided. Since at least a pair of side holes that face the side wall of one of the lumens and communicate with the outside are provided, and the side holes that communicate with the outside are provided on the side wall of the other lumen, at least a pair of the side holes provided facing each other. When hemodialysis is performed using a lumen with a side hole for blood removal as a blood removal lumen for hemodialysis, the force of sucking blood does not concentrate in one direction with respect to the side hole of the blood removal lumen but is applied in both directions. The ether can be held in a stable position in the blood vessel. This prevents the side hole of the blood removal lumen from approaching the inner wall of the blood vessel to prevent the occurrence of insufficient blood removal, and prevents the side hole from being blocked by the inner wall of the blood vessel, resulting in poor blood removal. Can be prevented
A highly reliable triple lumen catheter capable of stable and reliable blood removal can be obtained.
【００３０】また、本発明に係るトリプルルーメンカテ
ーテルは、第１のルーメンと第２のルーメンとの間にい
ずれか一方のルーメンの断面積が他方のルーメンの断面
積より大きくなるように隔壁を設けるとともに、対向し
て設けられた少なくとも一対の側孔を断面積の大きいル
ーメンに設けたので、断面積の大きいルーメンを脱血用
ルーメンとして血液透析を行うと、多い脱血流量で脱血
流量不足および脱血不良が防止された確実な血液透析を
行うことができ、患者に対する負担の小さい円滑で合理
的な血液透析を行えるトリプルルーメンカテーテルを得
ることができる。In the triple lumen catheter according to the present invention, a partition wall is provided between the first lumen and the second lumen so that the cross sectional area of one of the lumens is larger than the cross sectional area of the other lumen. At the same time, since at least a pair of side holes provided facing each other were provided in the lumen with a large cross-sectional area, when hemodialysis is performed using the lumen with a large cross-sectional area as the blood removal lumen, the amount of blood removed is insufficient and the amount of blood removed is insufficient. In addition, it is possible to obtain a triple-lumen catheter capable of performing reliable hemodialysis in which poor blood removal is prevented and performing smooth and rational hemodialysis with a small burden on the patient.
【００３１】さらに、本発明に係るトリプルルーメンカ
テーテルは、第１のルーメンまたは第２のルーメンのい
ずれか一方のルーメンの内壁の隔壁に対向する位置に隔
壁側に突出する肉厚部を形成し、この肉厚部に第３のル
ーメンを設けたので、ルーメンの側壁に対向して設けら
れる一対の側孔を１８０゜に近い位置関係に設けること
ができ、側孔の開口を大きく形成することができる。こ
れにより、脱血流量が多くなって流量を確保することが
でき、血管の内壁による側孔の閉塞を確実に防止するこ
とができる。Further, in the triple lumen catheter according to the present invention, a thick portion protruding toward the partition wall is formed at a position facing the partition wall of the inner wall of either the first lumen or the second lumen, Since the third lumen is provided in this thick portion, a pair of side holes facing the side wall of the lumen can be provided in a positional relationship close to 180 °, and the opening of the side hole can be made large. it can. As a result, the amount of blood removed can be increased to secure the flow rate, and it is possible to reliably prevent the side hole from being blocked by the inner wall of the blood vessel.
【００３２】また、本発明に係るトリプルルーメンカテ
ーテルは、基部側が拡径された截頭円すい状の頭部と、
頭部の基部から第１および第２のルーメンの側孔の先端
部近傍まで延設されてこれらルーメンの先端側を閉塞す
る２つの延長部と、第３のルーメンの先端部に連接され
頭部の円すい面に沿ってこの頭部に設けた先端開口部ま
で形成された連通孔とからなるソフトチップを備え、こ
のソフトチップの延長部を第１および第２のルーメンに
嵌入して結合し、第３のルーメンを連通孔に連通させて
カテーテルの先端部を構成したので、従来のようにカテ
ーテルの先端部に取り付けられたソフトチップを円すい
状に形成したり、ルーメンのデッドスペースをなくすた
めにインサートをルーメン内に別に設けるなどの手間が
なくなって構造を簡単にすることができ、ソフトチップ
の結合がより確実で作業工数を大幅に低減することがで
きるトリプルルーメンカテーテルを得ることができる。The triple-lumen catheter according to the present invention further comprises a truncated conical head having an enlarged diameter on the base side,
Two extension parts that extend from the base part of the head part to the vicinity of the tip parts of the side holes of the first and second lumens and close the tip parts of these lumens, and the head part that is connected to the tip parts of the third lumen parts A soft tip consisting of a communicating hole formed along the conical surface of the head up to the tip opening provided in the head, and the extended portion of the soft tip is fitted into the first and second lumens to be joined, Since the third lumen is connected to the communication hole to form the distal end of the catheter, the soft tip attached to the distal end of the catheter can be formed into a conical shape or the dead space of the lumen can be eliminated as in the conventional case. The triple loupe can simplify the structure by eliminating the trouble of separately installing the insert in the lumen, and the soft tip can be connected more reliably and the work man-hours can be greatly reduced. It is possible to obtain the emissions catheter.
【図１】本発明の実施形態の模式図、そのＡ−Ａ断面図
およびＢ−Ｂ断面図である。FIG. 1 is a schematic view of an embodiment of the present invention, an AA sectional view and a BB sectional view thereof.
【図２】図１の要部の拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.
【図３】従来のトリプルルーメンカテーテルの要部の拡
大断面図およびそのＣ−Ｃ断面図である。FIG. 3 is an enlarged cross-sectional view of a main part of a conventional triple lumen catheter and a CC cross-sectional view thereof.
【図４】従来の他のトリプルルーメンカテーテルの要部
の拡大断面図およびそのＤ−Ｄ断面図である。FIG. 4 is an enlarged sectional view of a main part of another conventional triple lumen catheter and a DD sectional view thereof.
【図５】従来のさらに他のトリプルルーメンカテーテル
の要部の拡大断面図およびそのＥ−Ｅ断面図である。FIG. 5 is an enlarged cross-sectional view of a main part of still another conventional triple lumen catheter and an EE cross-sectional view thereof.
１ トリプルルーメンカテーテル ２ 本体 ２ａ 隔壁 ２ｂ 肉厚部 ３ ソフトチップ ３ａ 頭部 ３ｂ，３ｃ 延長部 ６，７，８ ルーメン ６ａ，７ａ 側孔 ７ｂ 凸部 ９ 連通孔 1 Triple Lumen Catheter 2 Body 2a Septum 2b Wall Thickness 3 Soft Tip 3a Head 3b, 3c Extension 6,7,8 Lumens 6a, 7a Side Hole 7b Convex 9 Communication Hole
フロントページの続き (72)発明者 岡田 陽介 東京都渋谷区千駄ケ谷五丁目27番７号 日 本ブランズウイックビルディング５階 日 本シャーウッド株式会社内Front page continued (72) Inventor Yosuke Okada 5-7-7 Sendagaya, Shibuya-ku, Tokyo Nihon Brunswick Building 5F Nihon Sherwood Co., Ltd.
Claims (4)
に設けられた隔壁により形成された第１のルーメンおよ
び第２のルーメンと、これらのルーメンに並設されかつ
前記先端部に設けた先端開口部を介して外部と連通する
ように側壁内に設けられた第３のルーメンとを備え、 前記第１のルーメンおよび第２のルーメンのいずれか一
方のルーメンの側壁に対向して外部と連通する少なくと
も一対の側孔を設けるとともに、他方のルーメンの側壁
に外部と連通する側孔を設けたことを特徴とするトリプ
ルルーメンカテーテル。1. A first lumen and a second lumen which have a reduced diameter tip portion and are formed by a partition wall provided inside in the axial direction, and the tip portion which is arranged in parallel with these lumens. A third lumen provided in the side wall so as to communicate with the outside through a tip opening provided in the first lumen and the second lumen, and facing the side wall of either one of the first lumen and the second lumen. And a side hole communicating with the outside, and at least one side hole communicating with the outside is provided on the side wall of the other lumen.
にいずれか一方のルーメンの断面積が他方のルーメンの
断面積より大きくなるように隔壁を設けるとともに、前
記対向して設けられた少なくとも一対の側孔を断面積の
大きいルーメンに設けたことを特徴とする請求項１記載
のトリプルルーメンカテーテル。2. A partition is provided between the first lumen and the second lumen such that the cross-sectional area of one of the lumens is larger than the cross-sectional area of the other lumen, and the partition walls are provided so as to face each other. The triple lumen catheter according to claim 1, wherein at least a pair of side holes are provided in the lumen having a large cross-sectional area.
いずれか一方のルーメンの内壁の隔壁に対向する位置に
該隔壁側に突出する肉厚部を形成し、該肉厚部に前記第
３のルーメンを設けたことを特徴とする請求項１または
２記載のトリプルルーメンカテーテル。3. A thick portion projecting toward the partition is formed at a position of the inner wall of one of the first lumen and the second lumen facing the partition, and the third portion is formed in the thick portion. The triple lumen catheter according to claim 1 or 2, wherein the lumen is provided.
と、該頭部の基部から前記第１および第２のルーメンの
側孔の先端部近傍まで延設されてこれらルーメンの先端
側を閉塞する２つの延長部と、前記第３のルーメンの先
端部に連接され前記頭部の円すい面に沿って該頭部に設
けた先端開口部まで形成された連通孔とからなるソフト
チップを備え、該ソフトチップの延長部を前記第１およ
び第２のルーメンに嵌入して結合し、前記第３のルーメ
ンを前記連通孔に連通させてカテーテルの先端部を構成
したことを特徴とする請求項１，２または３記載のトリ
プルルーメンカテーテル。4. A truncated conical head having an enlarged diameter on the base side, and a tip of these lumens extending from the base of the head to the vicinity of the tips of the side holes of the first and second lumens. A soft tip including two extension portions that close the side and a communication hole that is connected to the distal end portion of the third lumen and that is formed along the conical surface of the head up to the distal end opening provided in the head. And an extension portion of the soft tip is fitted into and coupled to the first and second lumens, and the third lumen is communicated with the communication hole to form a distal end portion of the catheter. The triple lumen catheter according to claim 1, 2, or 3.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8089098A JPH09276410A (en) | 1996-04-11 | 1996-04-11 | Triple lumen catheter |
| PCT/US1997/006029 WO1997037699A1 (en) | 1996-04-11 | 1997-04-11 | Triple lumen catheter |
| CA002251227A CA2251227A1 (en) | 1996-04-11 | 1997-04-11 | Triple lumen catheter |
| AU24556/97A AU2455697A (en) | 1996-04-11 | 1997-04-11 | Triple lumen catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8089098A JPH09276410A (en) | 1996-04-11 | 1996-04-11 | Triple lumen catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09276410A true JPH09276410A (en) | 1997-10-28 |
Family
ID=13961419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8089098A Pending JPH09276410A (en) | 1996-04-11 | 1996-04-11 | Triple lumen catheter |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH09276410A (en) |
| AU (1) | AU2455697A (en) |
| CA (1) | CA2251227A1 (en) |
| WO (1) | WO1997037699A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095134A (en) * | 2004-09-30 | 2006-04-13 | Nippon Sherwood Medical Industries Ltd | Triple-lumen catheter |
| JP2012200573A (en) * | 2011-03-28 | 2012-10-22 | Kobe Univ | Two-balloon catheter |
| JP2014087695A (en) * | 2007-04-27 | 2014-05-15 | Cvdevices Llc | Device, system, and method for transpericardial access |
| JP2015526192A (en) * | 2012-08-23 | 2015-09-10 | グプタ, アンモルGUPTA, Anmol | High flow basket catheter for efficient continuous infusion peritoneal dialysis |
| JP2016022192A (en) * | 2014-07-22 | 2016-02-08 | ニプロ株式会社 | catheter |
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|---|---|---|---|---|
| US6991614B2 (en) | 1995-11-07 | 2006-01-31 | Boston Scientific Scimed, Inc. | Ureteral stent for improved patient comfort |
| US6413228B1 (en) | 1998-12-28 | 2002-07-02 | Pro Duct Health, Inc. | Devices, methods and systems for collecting material from a breast duct |
| US6712797B1 (en) * | 2000-09-19 | 2004-03-30 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Blood return catheter |
| US6976973B1 (en) | 2000-10-12 | 2005-12-20 | Baxter International Inc. | Peritoneal dialysis catheters |
| US6814718B2 (en) * | 2001-01-09 | 2004-11-09 | Rex Medical, L.P | Dialysis catheter |
| US8323228B2 (en) | 2007-04-12 | 2012-12-04 | Rex Medical L.P. | Dialysis catheter |
| US6758836B2 (en) | 2002-02-07 | 2004-07-06 | C. R. Bard, Inc. | Split tip dialysis catheter |
| US7393339B2 (en) | 2003-02-21 | 2008-07-01 | C. R. Bard, Inc. | Multi-lumen catheter with separate distal tips |
| US20040243095A1 (en) | 2003-05-27 | 2004-12-02 | Shekhar Nimkar | Methods and apparatus for inserting multi-lumen spit-tip catheters into a blood vessel |
| EP1670523B1 (en) | 2003-10-08 | 2018-10-03 | Medical Components, Inc. | Co-axial tapered catheter |
| US8992454B2 (en) | 2004-06-09 | 2015-03-31 | Bard Access Systems, Inc. | Splitable tip catheter with bioresorbable adhesive |
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| US9168355B2 (en) | 2006-09-29 | 2015-10-27 | Covidien Lp | Acute hemodialysis catheter assembly |
| US8292841B2 (en) | 2007-10-26 | 2012-10-23 | C. R. Bard, Inc. | Solid-body catheter including lateral distal openings |
| US8066660B2 (en) | 2007-10-26 | 2011-11-29 | C. R. Bard, Inc. | Split-tip catheter including lateral distal openings |
| CN101918067B (en) | 2007-11-01 | 2013-04-10 | C·R·巴德股份有限公司 | Catheter assembly including triple lumen tips |
| US9579485B2 (en) | 2007-11-01 | 2017-02-28 | C. R. Bard, Inc. | Catheter assembly including a multi-lumen configuration |
| JP2009273609A (en) | 2008-05-14 | 2009-11-26 | Nippon Sherwood Medical Industries Ltd | Catheter with valve |
| US9005154B2 (en) | 2008-09-26 | 2015-04-14 | Covidien Lp | Valved hemodialysis catheter |
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| JP5713732B2 (en) | 2011-03-08 | 2015-05-07 | 日本コヴィディエン株式会社 | Catheter with valve |
| US9072867B2 (en) | 2011-09-30 | 2015-07-07 | Covidien Lp | Catheter with external flow channel |
| US10143822B2 (en) | 2012-07-05 | 2018-12-04 | Covidien Lp | Valved tip catheters |
| US9155862B2 (en) | 2012-09-28 | 2015-10-13 | Covidien Lp | Symmetrical tip acute catheter |
| USD748252S1 (en) | 2013-02-08 | 2016-01-26 | C. R. Bard, Inc. | Multi-lumen catheter tip |
| WO2016011091A1 (en) | 2014-07-14 | 2016-01-21 | C. R. Bard, Inc. | Apparatuses, systems, and methods for inserting split tip catheters having enhanced stiffening and guiding features |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1330285C (en) * | 1987-12-22 | 1994-06-21 | Geoffrey S. Martin | Triple lumen catheter |
| US5221255A (en) * | 1990-01-10 | 1993-06-22 | Mahurkar Sakharam D | Reinforced multiple lumen catheter |
| US5403291A (en) * | 1993-08-02 | 1995-04-04 | Quinton Instrument Company | Catheter with elongated side holes |
| US5348536A (en) * | 1993-08-02 | 1994-09-20 | Quinton Instrument Company | Coextruded catheter and method of forming |
| US5378230A (en) * | 1993-11-01 | 1995-01-03 | Mahurkar; Sakharam D. | Triple-lumen critical care catheter |
-
1996
- 1996-04-11 JP JP8089098A patent/JPH09276410A/en active Pending
-
1997
- 1997-04-11 AU AU24556/97A patent/AU2455697A/en not_active Abandoned
- 1997-04-11 WO PCT/US1997/006029 patent/WO1997037699A1/en active Application Filing
- 1997-04-11 CA CA002251227A patent/CA2251227A1/en not_active Abandoned
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006095134A (en) * | 2004-09-30 | 2006-04-13 | Nippon Sherwood Medical Industries Ltd | Triple-lumen catheter |
| JP4592374B2 (en) * | 2004-09-30 | 2010-12-01 | 日本シャーウッド株式会社 | Triple lumen catheter |
| US8062247B2 (en) | 2004-09-30 | 2011-11-22 | Covidien Ag | Triple lumen catheter |
| JP2014087695A (en) * | 2007-04-27 | 2014-05-15 | Cvdevices Llc | Device, system, and method for transpericardial access |
| JP2012200573A (en) * | 2011-03-28 | 2012-10-22 | Kobe Univ | Two-balloon catheter |
| JP2015526192A (en) * | 2012-08-23 | 2015-09-10 | グプタ, アンモルGUPTA, Anmol | High flow basket catheter for efficient continuous infusion peritoneal dialysis |
| JP2016022192A (en) * | 2014-07-22 | 2016-02-08 | ニプロ株式会社 | catheter |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2251227A1 (en) | 1997-10-16 |
| WO1997037699A1 (en) | 1997-10-16 |
| AU2455697A (en) | 1997-10-29 |
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