JPH0392172A - Drip chamber for external circulation circuit - Google Patents

Drip chamber for external circulation circuit

Info

Publication number
JPH0392172A
JPH0392172A JP1228928A JP22892889A JPH0392172A JP H0392172 A JPH0392172 A JP H0392172A JP 1228928 A JP1228928 A JP 1228928A JP 22892889 A JP22892889 A JP 22892889A JP H0392172 A JPH0392172 A JP H0392172A
Authority
JP
Japan
Prior art keywords
filter
drip chamber
stiffness
mesh
weft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1228928A
Other languages
Japanese (ja)
Other versions
JP2720211B2 (en
Inventor
Hiroaki Watanabe
弘明 渡邉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SB Kawasumi Laboratories Inc
Original Assignee
Kawasumi Laboratories Inc
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.)
Filing date
Publication date
Application filed by Kawasumi Laboratories Inc filed Critical Kawasumi Laboratories Inc
Priority to JP1228928A priority Critical patent/JP2720211B2/en
Publication of JPH0392172A publication Critical patent/JPH0392172A/en
Application granted granted Critical
Publication of JP2720211B2 publication Critical patent/JP2720211B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To eliminate possibility generating the stagnation or loss of blood and to efficiently perform external circulation by forming the warp yarn constituting the filter arranged in a main body from polypropylene or polyester and forming the weft yarn thereof from polyamide. CONSTITUTION:A filter 2 is formed into a hat shape by alternately knitting warp yarns 6 and weft yarns 7 and superposing the knitted ones to thermally fuse the same. Each of the warp yarns 6 is constituted of material quality having stiffness and receiving no effect of temp. or humidity during processing and hard to deform upon the reception external force such as polypropylene or polyester. Each of the weft yarns 7 is constituted of material reduced in the adhesion of air bubbles and having hydrophilicity, for example, polyamide. Therefore, the warp yarns 6 having stiffness are supported by the weft yarns 7 and the filter 2 itself is not deformed by temp. or humidity when the filter 2 is processed into a hat shape and the filter 2 is obtained uniformly and, further, the stiffness of the whole of the filter 2 is kept even during external circulation and the deformation or wrinkles of the filter 2 can be prevented.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は,体外循環回路の途中に装着して使用されるド
リップチャンバーの改良であって、特にフィルターを補
強して、血液の損失、血液の滞溜を抑制することのでき
るドリップチャンバーに関するものである. [従来の技術及び従来技術の課題1 現在使用されている体外循環用血液回路のドリップチャ
ンバー内に配置されるろ過網は、その構成部分であるフ
ィラメントが、細かい糸を撚ってなったナイロン、ポリ
エステルとの混紡からなるマルチフィラメントと呼ばれ
るタイプと1本の糸でなったモノフィラメントと呼ばれ
るタイプとが有り、マルチフィラメントでは縦横それぞ
れ同材質または異材質の細かい撚糸により,モノフィラ
メントでは同材質により構成されている. この為、ボリブロビレンやポリエステルのフィラメント
で構成されているろ過網の場合は、それ自体にコシがあ
り弾力はあるが、その材質自体の特性から気泡が付着し
やすく、この気泡が血液に影響を与えるという問題があ
った. また,ボリアミドのフィラメントで構成されているろ過
網の場合は,気泡の付着は少ないが、コシが弱く加工中
の温・湿度及び外力の影響を受け、網目が変形し、ろ過
網全体にシワを生じたり潰れてしまったりして、ろ過網
としての機能を果たせなくなっていた.また、ろ過網は
、網目1枚で仕上がっている場合と数枚を溶着して仕上
がっている場合とがあり、血液によるろ過網の変形を防
ぐ為に網目の縁部や内側に補強部材を取り付けている.
この補強部材は血液を阻害したり、気泡を補足してその
ろ過面積を狭めたり,また補強部材の影響で、網目や補
強部材の周辺から下流にかけて血液の滞溜が発生し問題
になっていた.そこで以上の課題を解決するために本発
明は鋭意検討を重ねた結果、次の発明に到達した. [課題を解決するための手段] lの 日として、 体外循環回路の途中に装着されるドリップチャンバーl
であって、 体液流入口4及び体液流出口5を装着した本体3内に、
次の構成要素からなるフィルター2を配置した体外循環
回路用ドリップチャンバー1を提供するちのである. a.フィルター2を構成する縦糸6が、ボリブロビレン
又はポリエステルであること.b.フィルター2を構成
する横糸7が、ボリアミドであること. 2の  として、 体外循環回路の途中に装着されるドリップチャンバーで
あって、 体液流入口及び体液流出口を装着した本体内に、次の構
成要素からなるフィルター12を配置した体外循環回路
用ドリップチャンバーを提供するものである. a,フィルターl2が2枚の網目13、14から構成さ
れていること. b.前記網目13.14はお互いに異なる方向に形成さ
れていること. 東1旦且里亙旦工 第2の発明に記載した体外回路用ドリップチャンバーで
あって、フィルター22の網目23、24がお互いに異
なる材質で形成されている体外循環回路用ドリップチャ
ンバーを提供するらのである. [作用] 第1の発明においては、フィルター2自体にコシができ
、加工中の温度か湿度による影響を受けることなく、さ
らに体外循環中における血流によって漬れやシワが発生
することがない. 第2及び第3の発明については、フィルター12、22
の少なくと6一方の網目l3、23が構造及び材質的に
補強要素を持っているので、フィルター12.22が全
体的に、血流を阻害することなく、血流による変形等が
発生することがない. [実施例l1 第1図は本発明のドリップチャンバー1の概略図で、第
2図はドリップチャンバー1のフィルター2の拡大図を
示す. ドリップチャンバー1は、例えば硬質塩化ビニル等の硬
質プラスチックからなる本体3と,該本体3内に配置さ
れるフィルター2と前記本体3の上部及び下部に使用目
的に応じて取り付け位置を選択して装着される体液流入
口4及び体液流出口5が形成されている.フィルター2
は、第2図のように縦糸6と横糸7を交互に編み上げ、
これを重ね合せて熱溶着して、帽子状に形成したもので
ある.縦糸6は、ボリブロビレン、ポリエステル等のコ
シがあり、加工中の温度や湿度に影響されず,外力を受
けても変形しにくい材質より構成されている. 横糸7は、例えば、ボリアミド等の、気泡の付着が少な
い材質その他親水性のある材質より構成されている. このようにフィルター2を形成することによりコシのあ
る縦糸6により、横糸7を支えることが可能となり、フ
ィルター2を帽子状に、加工する際に、フィルター2自
身は温度や湿度により変形することなく画一的にフィル
ター2を得ることができ、さらに、体外循環中にもフィ
ルター2全体のコシを維持することができるので、フィ
ルター2の変形やシワを防止することができる. [実施例2] 第3図は、ドリップチャンバー1の本体3内に配置され
るフィルター12の概略図である. フィルター12は、2枚の網目l3、l4を溶着して帽
子状に形成したちのである.第1の網目13及び第2の
網目14は、それぞれ,単一の材質からなる糸を編み上
げて、網目の方向が同一となるように形成し,一方の網
目を補強するために、他方の網目の方向を示す延長11
a.bが交わる角度θが、45°±10″″、好ましく
は45”となるように配置したものである.(第4図参
照)このようにフィルター12を形成することにより,
血液が上から下に流れる場合、補強する側の網目l3の
各単糸13a,13bにより,血流による圧力が分散し
て吸収されることになるため、網目l3は変形すること
なくひいては網目l4の血流による変形をも抑制して補
強することができる. [実施例3] 91!5図は,ドリップチャンバー1の本体3内に配置
されるフィルター22の概略図である.フィルター22
は、お互いに材質の異なる2枚の網目23、24を溶着
して帽子状に形成したちのである. 第1の網目23は、ポリプロピレン、ポリエステル等の
コシがあり,加工中の温度や湿度に影響されず、外力を
受けてら変形しにくい材質より構成されている.第2の
網目24は、ボリアミド等の気泡の付着が少ない材質よ
り構成されている. 第1の網目23は、コシの強い材質より形成されている
ため網目24の血流による変形を抑制して補強すること
ができる. [発明の効果] 以上説明したように本発明のドリップチャンバーにおい
ては、フィルター2、l2、22は、前述した所定の構
造や材質により補強されているので、血液の滞瑠や血液
の損失が生じるおそれがなく、効率の良い体外循環が実
施できる等の効果を発揮する優れた発明である.
[Detailed Description of the Invention] [Industrial Application Field] The present invention is an improvement of a drip chamber used by being installed in the middle of an extracorporeal circulation circuit, and in particular, the filter is reinforced to prevent blood loss and blood loss. This relates to a drip chamber that can suppress the accumulation of water. [Prior art and problems with the prior art 1] The filter net placed in the drip chamber of the currently used extracorporeal circulation blood circuit has filaments that are made of nylon made of twisted fine threads; There are two types: multifilament, which is made of a blend with polyester, and monofilament, which is made of a single thread. Multifilament is made of finely twisted threads made of the same or different materials in the length and width, while monofilament is made of the same material. There is. For this reason, in the case of filtration nets made of filaments of polypropylene or polyester, they are stiff and elastic, but due to the characteristics of the material themselves, air bubbles tend to adhere to them, and these air bubbles can affect the blood. There was a problem. In addition, in the case of a filtration net made of bolyamide filaments, there are few air bubbles attached, but the mesh is weak and is affected by temperature, humidity, and external force during processing, causing the mesh to deform and wrinkles throughout the filtration net. They were forming and collapsing, and could no longer function as a filtration net. In addition, the filtration net may be made of one mesh or several welded meshes, and reinforcing members are attached to the edges and inside of the mesh to prevent deformation of the filtration mesh due to blood. ing.
This reinforcing material obstructs blood flow, traps air bubbles and narrows the filtration area, and due to the reinforcing material, blood accumulates downstream from around the mesh and reinforcing material, which has become a problem. .. Therefore, in order to solve the above problems, the present invention has been extensively studied, and as a result, the following invention has been arrived at. [Means for solving the problem] A drip chamber installed in the middle of the extracorporeal circulation circuit.
In the main body 3 equipped with a body fluid inlet 4 and a body fluid outlet 5,
We provide a drip chamber 1 for an extracorporeal circulation circuit in which a filter 2 consisting of the following components is arranged. a. The warp threads 6 constituting the filter 2 are made of polypropylene or polyester. b. The weft thread 7 constituting the filter 2 is made of polyamide. 2, a drip chamber for an extracorporeal circulation circuit, which is installed in the middle of an extracorporeal circulation circuit, and in which a filter 12 consisting of the following components is arranged in a main body equipped with a body fluid inlet and a body fluid outlet. It provides the following. a. Filter l2 is composed of two meshes 13 and 14. b. The meshes 13 and 14 are formed in different directions. To provide a drip chamber for an extracorporeal circuit according to the second invention, in which the meshes 23 and 24 of the filter 22 are made of different materials. It is from et al. [Function] In the first invention, the filter 2 itself becomes stiff, is not affected by temperature or humidity during processing, and does not become soaked or wrinkled due to blood flow during extracorporeal circulation. Regarding the second and third inventions, the filters 12, 22
At least 6 of the meshes 13 and 23 have reinforcing elements in terms of structure and material, so that the filter 12.22 as a whole does not obstruct blood flow and deformation due to blood flow occurs. There is no. [Example 11 FIG. 1 is a schematic diagram of the drip chamber 1 of the present invention, and FIG. 2 is an enlarged view of the filter 2 of the drip chamber 1. The drip chamber 1 includes a main body 3 made of hard plastic such as hard vinyl chloride, a filter 2 disposed within the main body 3, and mounting positions selected at the top and bottom of the main body 3 depending on the purpose of use. A body fluid inlet 4 and a body fluid outlet 5 are formed. filter 2
As shown in Figure 2, the warp threads 6 and weft threads 7 are knitted alternately,
These were stacked and heat welded to form a hat shape. The warp threads 6 are made of a material such as polypropylene, polyester, etc., which has stiffness, is not affected by temperature or humidity during processing, and is not easily deformed even when subjected to external force. The weft yarn 7 is made of a material that has a hydrophilic property, such as polyamide, which has a low adhesion of air bubbles. By forming the filter 2 in this way, the stiff warp threads 6 can support the weft threads 7, and when processing the filter 2 into a hat shape, the filter 2 itself will not deform due to temperature or humidity. Since the filter 2 can be uniformly obtained and the stiffness of the entire filter 2 can be maintained even during extracorporeal circulation, deformation and wrinkles of the filter 2 can be prevented. [Example 2] FIG. 3 is a schematic diagram of a filter 12 disposed within the main body 3 of the drip chamber 1. The filter 12 is formed into a hat shape by welding two meshes 13 and 14. The first mesh 13 and the second mesh 14 are each formed by knitting threads made of a single material so that the direction of the mesh is the same, and in order to reinforce one mesh, the other mesh is Extension 11 showing the direction of
a. The filter 12 is arranged so that the angle θ at which the angles b intersect is 45°±10″″, preferably 45″. (See FIG. 4) By forming the filter 12 in this way,
When blood flows from top to bottom, the pressure caused by the blood flow is dispersed and absorbed by the single threads 13a and 13b of the mesh l3 on the reinforcing side, so the mesh l3 does not deform and eventually the mesh l4 It can also be reinforced by suppressing deformation caused by blood flow. [Embodiment 3] Figure 91!5 is a schematic diagram of the filter 22 arranged inside the main body 3 of the drip chamber 1. Filter 22
In this case, two meshes 23 and 24 made of different materials are welded together to form a hat shape. The first mesh 23 is made of a material such as polypropylene, polyester, etc., which has elasticity, is not affected by temperature or humidity during processing, and is not easily deformed by external force. The second mesh 24 is made of a material such as polyamide, which has less adhesion of air bubbles. Since the first mesh 23 is made of a strong material, it can be reinforced by suppressing deformation of the mesh 24 due to blood flow. [Effects of the Invention] As explained above, in the drip chamber of the present invention, the filters 2, 12, and 22 are reinforced with the above-described predetermined structure and material, so that blood stagnation and blood loss occur. This is an excellent invention that provides effects such as being able to carry out efficient extracorporeal circulation without any risk.

【図面の簡単な説明】 第1図はドリップチャンバーの概略図、第2図はドリッ
プチャンバー内に装着されるフィルターの概略図、第3
図は第2図のフィルタ一部分拡大図、第4図及び第5図
は、フルターその他の実施例を示す概略図である.図中
、lはドリップチャンバー、2.12.22はフィルタ
ー、6は縦糸,7は横糸、13.23は第1の網目、1
4.24は第2の網目を示す.
[Brief explanation of the drawings] Figure 1 is a schematic diagram of the drip chamber, Figure 2 is a schematic diagram of the filter installed in the drip chamber, and Figure 3 is a schematic diagram of the filter installed in the drip chamber.
The figure is a partially enlarged view of the filter in FIG. 2, and FIGS. 4 and 5 are schematic diagrams showing filters and other embodiments. In the figure, l is the drip chamber, 2, 12, 22 is the filter, 6 is the warp, 7 is the weft, 13.23 is the first mesh, 1
4.24 shows the second mesh.

Claims (3)

【特許請求の範囲】[Claims] (1)体外循環回路の途中に装着されるドリップチャン
バーであって、 体液流入口及び体液流出口を装着した本体 内に、次の構成要素からなるフィルターを配置したこと
を特徴とする体外循環回路用ドリップチャンバー。 a、フィルターを構成する縦糸が、ポリプ ロピレン又はポリエステルであること。 b、フィルターを構成する横糸が、ポリア ミドであること。
(1) A drip chamber installed in the middle of the extracorporeal circulation circuit, characterized in that a filter consisting of the following components is arranged inside the main body equipped with a body fluid inlet and a body fluid outlet. drip chamber. a. The warp that constitutes the filter is polypropylene or polyester. b. The weft that makes up the filter is made of polyamide.
(2)体外循環回路の途中に装着されるドリップチャン
バーであって、 体液流入口及び体液流出口を装着した本体 内に、次の構成要素からなるフィルターを配置したこと
を特徴とする体外循環回路用ドリップチャンバー。 a、フィルターが2枚の網目から構成され ていること。 b、前記網目はお互いに異なる方向に形成 されていること。
(2) A drip chamber installed in the middle of the extracorporeal circulation circuit, characterized in that a filter consisting of the following components is arranged inside the main body equipped with a body fluid inlet and a body fluid outlet. drip chamber. a. The filter is composed of two meshes. b. The meshes are formed in different directions.
(3)特許請求の範囲第2項に記載した体外回路用ドリ
ップチャンバーであって、フィルターの網目がお互いに
異なる材質で形成されていることを特徴とする体外循環
回路用ドリップチャンバー。
(3) The drip chamber for an extracorporeal circulation circuit as set forth in claim 2, wherein the filter mesh is formed of different materials.
JP1228928A 1989-09-04 1989-09-04 Drip chamber for extracorporeal circulation circuit Expired - Fee Related JP2720211B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1228928A JP2720211B2 (en) 1989-09-04 1989-09-04 Drip chamber for extracorporeal circulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1228928A JP2720211B2 (en) 1989-09-04 1989-09-04 Drip chamber for extracorporeal circulation circuit

Publications (2)

Publication Number Publication Date
JPH0392172A true JPH0392172A (en) 1991-04-17
JP2720211B2 JP2720211B2 (en) 1998-03-04

Family

ID=16884054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1228928A Expired - Fee Related JP2720211B2 (en) 1989-09-04 1989-09-04 Drip chamber for extracorporeal circulation circuit

Country Status (1)

Country Link
JP (1) JP2720211B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104857590A (en) * 2015-06-03 2015-08-26 戎静华 Anticoagulant liquid stop infusion apparatus with flow changing switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104857590A (en) * 2015-06-03 2015-08-26 戎静华 Anticoagulant liquid stop infusion apparatus with flow changing switch

Also Published As

Publication number Publication date
JP2720211B2 (en) 1998-03-04

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