JPH0344207Y2 - - Google Patents
Info
- Publication number
- JPH0344207Y2 JPH0344207Y2 JP1987065386U JP6538687U JPH0344207Y2 JP H0344207 Y2 JPH0344207 Y2 JP H0344207Y2 JP 1987065386 U JP1987065386 U JP 1987065386U JP 6538687 U JP6538687 U JP 6538687U JP H0344207 Y2 JPH0344207 Y2 JP H0344207Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- catheter
- shunt
- ventricular
- wall surface
- 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.)
- Expired
Links
- 230000002861 ventricular Effects 0.000 claims description 40
- 210000001175 cerebrospinal fluid Anatomy 0.000 claims description 24
- 230000001746 atrial effect Effects 0.000 claims description 10
- 210000002837 heart atrium Anatomy 0.000 claims description 8
- 210000004556 brain Anatomy 0.000 claims description 5
- 210000003200 peritoneal cavity Anatomy 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 210000004379 membrane Anatomy 0.000 description 9
- 239000012528 membrane Substances 0.000 description 9
- 210000004761 scalp Anatomy 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 6
- 210000000683 abdominal cavity Anatomy 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 210000003625 skull Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000008155 medical solution Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000003906 hydrocephalus Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
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
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
- A61M27/002—Implant devices for drainage of body fluids from one part of the body to another
- A61M27/006—Cerebrospinal drainage; Accessories therefor, e.g. valves
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Ophthalmology & Optometry (AREA)
- Otolaryngology (AREA)
- Anesthesiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、水頭症の患者の体内に手術により埋
め込まれる脳室−腹腔シヤントまたは脳室−心房
シヤント（以下、「脳室シヤント」という。）に関
し、特に流量を調整（遮断を含む）できるように
した脳室シヤントに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a ventricle-peritoneal shunt or a ventricular-atrial shunt (hereinafter referred to as "ventricular shunt") that is surgically implanted in the body of a patient with hydrocephalus. ), and particularly relates to ventricular shunts that allow the flow to be adjusted (including blocking).
従来の脳室シヤントとして、特開昭50−117280
号公報に示される「生理学上の分流機構用のプラ
グ弁」が提案されている。
As a conventional ventricular shunt, JP-A-117280
``Plug valve for physiological diversion mechanism'' is proposed as shown in the publication.
この従来の脳室シヤントは、第２２，２３図に
示すように、脳室内へ挿し込まれる細管状の脳室
カテーテル２と、この脳室カテーテル２に接続し
てリザーバ１１やポンプ室３１により構成される
シヤント本体（中継室）１′と、このシヤント本
体１′に接続されて腹腔や心房へ挿し込まれるチ
ユーブ状の腹腔カテーテルまたは心房カテーテル
３とで構成されている。 As shown in FIGS. 22 and 23, this conventional ventricular shunt consists of a thin tube-shaped ventricular catheter 2 inserted into the ventricle, and a reservoir 11 and a pump chamber 31 connected to the ventricular catheter 2. The shunt body (relay chamber) 1' is connected to the shunt body 1' and a tube-shaped peritoneal catheter or atrial catheter 3 is inserted into the abdominal cavity or atrium.
そして、上記シヤント本体１′は、頭皮１６下
で頭蓋骨上に埋設され、同シヤント本体１′の内
部には、脳室からの排出液である髄液の圧力によ
り押し開かれうるマイター弁等により構成される
リリーフ弁４が設けられており、このリリーフ弁
４は、流量調整部としての機能により流量の規制
を行なうとともに逆止弁としての機能をそなえて
いる。 The shunt body 1' is buried on the skull under the scalp 16, and inside the shunt body 1' there is a miter valve or the like that can be pushed open by the pressure of cerebrospinal fluid, which is fluid discharged from the ventricles. A relief valve 4 is provided, which functions as a flow rate regulator to regulate the flow rate and also functions as a check valve.
この脳室シヤントにおける流路１３中に、脳室
カテーテル２から腹腔カテーテル３へ向けて、リ
ザーバ１１と、リザーバ１１と逆止弁（マイター
弁）４とを介して連通する遮断弁開放用ポンプ室
３１と、流路１３を遮断しうる遮断弁機構として
のボタン式開閉弁３２とが順次配設されている。 In the flow path 13 in this ventricular shunt, a pump chamber for opening a cutoff valve communicates from the ventricular catheter 2 to the peritoneal catheter 3 via a reservoir 11 and a check valve (miter valve) 4 between the reservoir 11 and the reservoir 11. 31 and a button-type on-off valve 32 as a shutoff valve mechanism capable of shutting off the flow path 13 are arranged in this order.
このボタン式開閉弁３２は、シヤント本体１′
の遮断弁開放用ポンプ室３１に連通するとともに
腹腔カテーテル３側流路１３に開口３２ｅを介し
て連通する弁室（空所）３２ｆと、弁室３２ｆの
上部壁面を形成し、指１８等の外力を受けて凹み
うる可撓膜３２ａと、開口３２ｅの周囲における
中間仕切膜３２ｄに形成された弁座３２ｃと、可
撓膜３２ａの弁室３２ｆ側壁面に取り付けられて
可撓膜３２ａの下方への押圧時に開口３２ｅを閉
鎖しうる突起状弁体３２ｂとをそなえたプツシユ
式開閉弁として構成されている。 This button type on-off valve 32 is connected to the shunt main body 1'.
The upper wall surface of the valve chamber 32f is formed with a valve chamber (empty space) 32f that communicates with the pump chamber 31 for opening the cutoff valve and also communicates with the peritoneal catheter 3 side flow path 13 via the opening 32e. A flexible membrane 32a that can be dented by receiving an external force, a valve seat 32c formed on the intermediate partition membrane 32d around the opening 32e, and a valve seat 32c attached to the side wall surface of the valve chamber 32f of the flexible membrane 32a below the flexible membrane 32a. It is configured as a push-type on-off valve equipped with a protruding valve body 32b that can close the opening 32e when pressed.
このような従来の開閉弁付き脳室シヤントで
は、ボタン式開閉弁３２を作動させるには、第２
２図に鎖線で示すように、指１８で頭皮１６を介
して可撓膜３２ａを押圧して、可撓膜３２ａの中
央下側に付設された突起状弁体３２ｂを弁座３２
ｃである中間仕切り膜３２ｄの開口３２ｅに押し
込むことにより、開口３２ｅを閉鎖する。
In such a conventional ventricular shunt with an on-off valve, in order to operate the button-type on-off valve 32, the second
As shown by the chain line in FIG. 2, the flexible membrane 32a is pressed through the scalp 16 with the finger 18, and the protruding valve body 32b attached to the lower center of the flexible membrane 32a is pushed onto the valve seat 32.
The opening 32e is closed by pushing it into the opening 32e of the intermediate partition membrane 32d.
また、ボタン式開閉弁３２を開放状態にするに
は、遮断弁開放用ポンプ室３１における上部可撓
膜３１ａを押圧することにより、弁室３２ｆ内の
圧力が高められて、弁体３２ｂが開口３２ｅから
上方へ離脱することにより、ボタン式開閉弁３２
が開放状態となる。 Furthermore, in order to open the button-type on-off valve 32, by pressing the upper flexible membrane 31a in the pump chamber 31 for opening the shutoff valve, the pressure in the valve chamber 32f is increased, and the valve body 32b is opened. By separating upward from 32e, the button type on-off valve 32
becomes open.
ところで、上述の脳室シヤントの埋設後に、脳
室内へ薬液を注入したり、薬液や髄液を還流させ
て脳のコンプライアンス等を測定したりする場
合、流路１３を遮断するが、従来の脳室シヤント
ではボタン式開閉弁３２により遮断しているの
で、開閉弁３２の確実な開閉作動を行ないずらい
という問題点がある。 By the way, when a medical solution is injected into the ventricle of the brain after the above-mentioned ventricular shunt is implanted, or when the medical solution or cerebrospinal fluid is refluxed to measure brain compliance, etc., the flow path 13 is blocked. Since the chamber shunt is shut off by the button-type on-off valve 32, there is a problem in that it is difficult to open and close the on-off valve 32 reliably.
本考案は、このような問題点の解決をはかろう
とするもので、患者の体内に埋設されるべきシヤ
ント本体の内部の流路における開閉弁を、体外か
らの駆動力により円滑に作動させうるようにし
た、開閉弁付き脳室シヤントを提供することを目
的とする。 The present invention aims to solve these problems, and it is possible to smoothly operate the on-off valve in the flow path inside the shunt body to be implanted in the patient's body using a driving force from outside the body. The purpose of the present invention is to provide a ventricular shunt with an on-off valve.
このため本考案の開閉弁付き脳室シヤントは、
脳室に先端部を挿し込まれて同脳室から髄液を排
出しうる脳室カテーテルと、腹腔または心房に先
端部を挿し込まれて同腹腔または心房へ上記髄液
を送出しうる腹腔カテーテルまたは心房カテーテ
ルと、上記脳室カテーテルの基端部と上記の腹腔
カテーテルまたは心房カテーテルの基端部とにそ
れぞれ接続されて各カテーテルを連通させるシヤ
ント本体とをそなえた脳室シヤントにおいて、上
記の腹腔カテーテルまたは心房カテーテルから上
記脳室カテーテルへの髄液の逆流を防止しうる逆
止弁をそなえ、上記シヤント本体に、上記脳室カ
テーテルから上記の腹腔カテーテルまたは心房カ
テーテルへ髄液を送るための流路と、同流路に介
挿され同流路を遮断しうる開閉弁とが設けられ、
同開閉弁が、上記シヤント本体の壁面に形成され
た弁座と、同弁座よりも上流側の上記シヤント本
体に形成された弁室と、上記シヤント本体の外側
からの駆動力を受けて上記弁座に整合する開閉弁
閉鎖位置と上記弁座に整合しない開閉弁開放位置
との間で移動しうるように上記弁室に封入された
球状可動弁体とをそなえたボール式開閉弁として
構成されて、上記開閉弁閉鎖位置または上記開閉
弁開放位置における上記弁室の内壁面から上記球
状可動弁体を離隔して保持すべく同内壁面に位置
保持用突起が設けられたことを特徴としている。
For this reason, the ventricular shunt with an on-off valve of this invention,
A ventricular catheter whose tip is inserted into the ventricle of the brain to drain cerebrospinal fluid from the same ventricle, and a peritoneal catheter whose tip is inserted into the peritoneal cavity or atrium to discharge the cerebrospinal fluid to the peritoneal cavity or atrium. or a ventricular shunt comprising an atrial catheter and a shunt body that is connected to the proximal end of the ventricular catheter and the proximal end of the peritoneal catheter or the atrial catheter, respectively, to communicate the catheters; A check valve capable of preventing backflow of cerebrospinal fluid from the catheter or atrial catheter to the ventricular catheter is provided in the shunt body, and a flow is provided in the shunt body for transmitting cerebrospinal fluid from the ventricular catheter to the peritoneal catheter or the atrial catheter. A flow path and an on-off valve inserted into the flow path and capable of blocking the flow path are provided,
The on-off valve receives a driving force from a valve seat formed on the wall surface of the shunt body, a valve chamber formed in the shunt body upstream of the valve seat, and the outside of the shunt body. Constructed as a ball-type on-off valve equipped with a spherical movable valve body enclosed in the valve chamber so as to be movable between an on-off valve closed position that aligns with the valve seat and an on-off valve open position that does not align with the valve seat. and a position holding protrusion is provided on the inner wall surface of the valve chamber to hold the spherical movable valve body away from the inner wall surface of the valve chamber when the on-off valve is in the closed position or the on-off valve is in the open position. There is.
上述の本考案の開閉弁付き脳室シヤントでは、
流路に介挿された開閉弁の球状可動弁体が、定常
時には、開閉弁閉鎖位置または上記開閉弁開放位
置において、位置保持用突起により弁室の内壁面
から隔隔して保持されて、移動時には、弁室の外
側からの駆動力によりこれらの位置保持用突起か
ら離脱して移動し、このとき球状可動弁体と弁室
の内壁面との隙間へ髄液が出入りすることによ
り、球状可動弁体が移動しやすく、このようにし
て流路の連通遮断が円滑に行なわれる。
In the ventricular shunt with an on-off valve of the present invention described above,
The spherical movable valve body of the on-off valve inserted in the flow path is held in the on-off valve closed position or the on-off valve open position in a steady state by a position holding protrusion so as to be spaced apart from the inner wall surface of the valve chamber, During movement, the valve chamber is moved away from these position-holding protrusions by a driving force from outside the valve chamber, and at this time, cerebrospinal fluid enters and exits the gap between the spherical movable valve body and the inner wall surface of the valve chamber, causing the spherical shape to move. The movable valve body is easy to move, and in this way, communication and interruption of the flow path is smoothly performed.
以下、図面により本考案の実施例について説明
すると、第１〜２１図は本考案の一実施例として
の開閉弁付き脳室シヤントを示すものである。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figs. 1 to 21 show a ventricular shunt with an on-off valve as an embodiment of the present invention.
本実施例としての開閉弁付き脳室シヤントは、
第５，６図に示すように、患者の脳室に先端部を
挿し込まれて同脳室から髄液を排出しうる細管状
の脳室カテーテル２と、腹腔または心房に先端部
を挿し込まれて腹腔または心房へ上記髄液を送出
しうる腹腔カテーテルまたは心房カテーテル（以
下、「腹腔カテーテル」という。）３と、脳室カテ
ーテル２の基端部に取り付けられたジヨイント２
ａと腹腔カテーテル３の基端部に取り付けられた
ジヨイント３ａとにそれぞれ接続されて各カテー
テル２，３を相互に連通させる主通路１０をそな
えたシリコン樹脂製等の軟質壁からなるシヤント
本体（中継室）１とをそなえて構成されている。 The ventricular shunt with an on-off valve as this example is:
As shown in Figures 5 and 6, there is a tubular ventricular catheter 2 whose tip is inserted into a patient's ventricle to drain cerebrospinal fluid from the same ventricle, and a catheter 2 whose tip is inserted into the abdominal cavity or atrium. a peritoneal catheter or an atrial catheter (hereinafter referred to as a "peritoneal catheter") 3 that can send the cerebrospinal fluid to the peritoneal cavity or atrium; and a joint 2 attached to the proximal end of the ventricular catheter 2.
a and a joint 3a attached to the proximal end of the peritoneal catheter 3, respectively, and has a main passage 10 that allows the catheters 2 and 3 to communicate with each other. It consists of a chamber) 1.
また、これらのシヤント本体１、脳室カテーテ
ル２および腹腔カテーテル３には、腹腔カテーテ
ル３から脳室カテーテル２への髄液の逆流を防止
しうる逆止弁４が設けられており、この逆止弁４
は、本実施例では後述する流量切替機構５の流量
調整部としてのスリツト式リリーフ弁６，７がそ
の機能を兼用している。 In addition, the shunt main body 1, the ventricular catheter 2, and the peritoneal catheter 3 are provided with a check valve 4 that can prevent backflow of cerebrospinal fluid from the peritoneal catheter 3 to the ventricular catheter 2. valve 4
In this embodiment, slit type relief valves 6 and 7 serving as flow rate adjusting sections of a flow rate switching mechanism 5, which will be described later, also serve this function.
これらのスリツト式リリーフ弁６，７は第８，
１４，１５図に示すように、後述の円形弁座８
ａ，９ａとそれぞれ一体に形成されて、リリーフ
弁付き部材１９を構成しており、各リリーフ弁付
き部材１９は、シヤント本体１の上部１Ａと下部
１Ｂとの接着時に、これらの上部１Ａおよび下部
１Ｂの間に接続挟持されるようになつている。 These slit type relief valves 6, 7 are the eighth,
As shown in Figures 14 and 15, a circular valve seat 8, which will be described later,
a, 9a, respectively, to constitute a member 19 with a relief valve, and each member 19 with a relief valve is formed integrally with the upper part 1A and the lower part 1B of the shunt body 1 when the upper part 1A and the lower part 1B are bonded together. 1B.
シヤント本体１は、第５，６図に示すように、
縫糸貫通孔１５を貫通する縫糸等を頭皮１６（第
１７図参照）に縫合することにより、頭皮１６下
で頭蓋骨１７上に固定されており、上述の脳室カ
テーテル２と腹腔カテーテル３とに接続する主通
路１０（第１２，１３図参照）と、主通路１０の
脳室カテーテル２側に形成された小室状のリザー
バ１１と、主通路１０の腹腔カテーテル３側に形
成された小室１２と、リザーバ１１よりも下流側
（腹腔側）の主通路１０における分岐部１０ａと
小室１２とを相互に並列接続する第１の流路１３
および第２の流路１４とをそなえて構成されてい
る。 The shunt main body 1, as shown in FIGS. 5 and 6,
By suturing a suture or the like passing through the suture through hole 15 to the scalp 16 (see FIG. 17), it is fixed on the skull 17 under the scalp 16 and connected to the above-mentioned ventricular catheter 2 and peritoneal catheter 3. a small chamber-shaped reservoir 11 formed on the ventricular catheter 2 side of the main passage 10 (see FIGS. 12 and 13), and a small chamber 12 formed on the peritoneal catheter 3 side of the main passage 10, A first channel 13 that connects the branch section 10a and the small chamber 12 in the main channel 10 downstream (abdominal cavity side) of the reservoir 11 in parallel with each other.
and a second flow path 14.
第１の流路１３には、第８図に示すように、リ
リーフ弁付き部材１９の先端部に形成されて、こ
の第１の流路１３の連通状態における流量を所定
流量Q1に調整しうる所定深さD1のスリツト６ａ
を形成された第１の流量調整部としてのスリツト
式リリーフ弁６と、シヤント本体１の外側からの
駆動力を受けてこの第１の流路１３を遮断しうる
第１の開閉弁としてのボール式開閉弁８とが介挿
されている。 As shown in FIG. 8, in the first flow path 13, a relief valve is formed at the tip of a member 19 to adjust the flow rate in the communicating state of the first flow path 13 to a predetermined flow rate Q1. Slit 6a with a predetermined depth D 1
a slit-type relief valve 6 as a first flow rate adjusting section formed with a slit-type relief valve 6, and a ball as a first opening/closing valve that can shut off the first flow path 13 by receiving a driving force from the outside of the shunt body 1. A type on-off valve 8 is inserted.
ボール式開閉弁８は、第１，７図に示すよう
に、リリーフ弁付き部材１９の基端部に形成され
た円形弁座８ａと、同円形弁座８ａに対向する上
流側の第１の流路１３に形成された弁室８ｂと、
同弁室８ｂに封入されて弁室８ｂの軟質壁１ａお
よび頭皮１６を通じて外側からの指１８などによ
る駆動力を受けて移動しうる可動球状弁体８ｃ
と、弁体８ｃを弁座８ａに整合させた開閉弁閉鎖
位置においてこの弁体８ｃを弁座８ａに付勢させ
るべく軟質壁１ａの内壁面１ｃから突出形成され
た２つの１段構成の開閉弁閉鎖位置保持用小突起
８ｄ（第１０図参照）と、弁体８ｃを弁座８ａか
ら離隔した開閉弁開放位置において支持すべく軟
質壁１ａの内壁面１ｃから突出形成された２つの
上下方向に縦長の開閉弁開放位置保持用突起８ｆ
（第９，１１図参照）と、開閉弁閉鎖位置におけ
る弁体８ｃを弁座８ａに付勢するとともに開閉弁
開放位置における弁体８ｃを支持しこれらの閉鎖
位置と開放位置との間で弁体８ｃを移動させる際
にクリツクストツプ機能を発揮する２段構成の位
置保持およびクリツクストツプ兼用小突起８ｅ
（第９図参照）とから構成されている。 As shown in FIGS. 1 and 7, the ball type on-off valve 8 includes a circular valve seat 8a formed at the base end of a member 19 with a relief valve, and a first valve seat on the upstream side opposite to the circular valve seat 8a. a valve chamber 8b formed in the flow path 13;
A movable spherical valve body 8c is enclosed in the valve chamber 8b and is movable through the soft wall 1a of the valve chamber 8b and the scalp 16 under the driving force of a finger 18 or the like from the outside.
Two one-stage opening/closing valves are formed to protrude from the inner wall surface 1c of the soft wall 1a in order to bias the valve body 8c against the valve seat 8a in the closing position where the valve body 8c is aligned with the valve seat 8a. A small projection 8d for holding the valve closed position (see FIG. 10), and two vertically protruding portions formed from the inner wall surface 1c of the soft wall 1a to support the valve body 8c in the open/close valve open position separated from the valve seat 8a. Vertically long protrusion 8f for holding the open/close valve in the open position
(See Figures 9 and 11), urges the valve body 8c in the closed position of the on-off valve against the valve seat 8a, supports the valve body 8c in the open position of the on-off valve, and moves the valve between the closed position and the open position. A small protrusion 8e that functions as a two-stage position holding function and doubles as a click stop when moving the body 8c.
(See Figure 9).
すなわち、弁体８ｃは、開閉弁８を閉鎖し第１
の流路１３を遮断する開閉弁閉鎖位置において、
リング状の円形弁座８ａと、上下２つの１段構成
の小突起８ｄと、上下２つの２段構成の小突起８
ｅとに当接することにより、弁室８ｂを囲む軟質
壁１ａの内壁面１ｃから離隔して所定の隙間をも
つて支持されている。 That is, the valve body 8c closes the on-off valve 8 and closes the first valve.
In the closed position of the on-off valve that blocks the flow path 13,
A ring-shaped circular valve seat 8a, two upper and lower small protrusions 8d with a single stage structure, and two upper and lower small protrusions 8 with a two-stage structure.
By abutting against the valve chamber 8b, the valve chamber 8b is supported with a predetermined gap from the inner wall surface 1c of the soft wall 1a surrounding the valve chamber 8b.
また、弁体８ｃは、開閉弁８を開放し第１の流
路１３を遮断する開閉弁開放位置において、２つ
の上下に縦長の突起８ｆと、上下２つの２段構成
の小突起８ｅとに当接することにより、弁室８ｂ
を囲む軟質壁１ａの内壁面１ｃから離隔して所定
の隙間をもつて支持されている。 In addition, in the on-off valve open position where the on-off valve 8 is opened and the first flow path 13 is blocked, the valve body 8c has two vertically elongated projections 8f and two small projections 8e in a two-stage configuration, upper and lower. By abutting, the valve chamber 8b
It is supported with a predetermined gap from the inner wall surface 1c of the surrounding soft wall 1a.
そして、２段構成の小突起８ｅは、弁体8cを開
閉弁閉鎖位置または開閉弁開放位置に選択的に支
持させる機能を有する。 The two-stage small protrusion 8e has a function of selectively supporting the valve body 8c in the on-off valve closed position or the on-off valve open position.
第２の流路１４には、第８図に示すように、リ
リーフ弁付き部材１９の先端部に形成されて、こ
の第２の流路１４の連通状態における流量を所定
流量Q2（ここでは、＝１／2Q1）に調整しうる所定
深さD2（＜D1）のスリツト７ａを形成された第２
の流量調整部としてのスリツト式リリーフ弁７
と、シヤント本体１の外側からの駆動力を受けて
第２の流路１４を遮断しうる第２の開閉弁として
のボール式開閉弁９とが介挿されている。 As shown in FIG. 8, the second flow path 14 is formed at the tip of the member 19 with a relief valve, and the flow rate in the communicating state of the second flow path 14 is set to a predetermined flow rate Q 2 (here, , = 1/2Q 1 ) formed with a slit 7a having a predetermined depth D 2 (<D 1 ).
Slit type relief valve 7 as a flow rate adjustment part
A ball-type on-off valve 9 serving as a second on-off valve capable of blocking the second flow path 14 by receiving a driving force from the outside of the shunt body 1 is inserted.
このボール式開閉弁９は、上述のボール式開閉
弁８とほぼ同様に構成されている。 This ball-type on-off valve 9 is constructed almost the same as the ball-type on-off valve 8 described above.
第１のリリーフ弁６は第２のリリーフ弁７より
も大きい規制流量を有しており、本実施例では各
リリーフ弁６，７がいずれも単一スリツト型の逆
止弁として構成されているが、これらを十字スリ
ツト型のものや、スプリング付きのものあるいは
メンブレン式のものなどに変更してもよい。 The first relief valve 6 has a larger regulated flow rate than the second relief valve 7, and in this embodiment, each of the relief valves 6 and 7 is configured as a single-slit check valve. However, these may be changed to a cross-slit type, a spring-equipped type, or a membrane type.
可動球状弁体８ｃ，９ｃの材質としては、プラ
スチツク系のものや金属材が用いられるが、金属
球にシリコン樹脂の被覆を施したものでもよい。
プラスチツク製可動球状弁体の場合は、金属製の
場合と同様に、レントゲン写真による可動球状弁
体８ｃ，９ｃの位置確認を行なえるように、その
プラスチツク材に造影剤を混入しておくことが望
ましい。 The movable spherical valve bodies 8c, 9c may be made of plastic or metal, but metal balls coated with silicone resin may also be used.
In the case of movable spherical valve bodies made of plastic, as in the case of metal movable valve bodies, a contrast medium may be mixed into the plastic material so that the position of the movable spherical valve bodies 8c, 9c can be confirmed by X-ray photography. desirable.
流量切替機構５は、上述のごとく、所定流量
Q1の流通を制御するため第１の流路１３に介挿
されたスリツト式リリーフ弁６とボール式開閉弁
８とをそなえた第１の流量切替部５ａと、所定流
量Q2（＝１／2Q1）の流通を制御するため第２の
流路１４に介挿されたスリツト式リリーフ弁７と
ボール式開閉弁９とをそなえた第２の流量切替部
５ｂとから構成されていて、これらの開閉弁８，
９における弁体８ｃ，９ｃの移動方向F1，F2は
相互に平行となるとともに、シヤント本体１の中
心線Ｌに平行となるように構成されている。 As mentioned above, the flow rate switching mechanism 5 controls the predetermined flow rate.
A first flow rate switching section 5a includes a slit type relief valve 6 and a ball type on-off valve 8 inserted in the first flow path 13 to control the flow of Q1, and a predetermined flow rate Q2 (=1 / 2Q1 ) consists of a second flow rate switching section 5b equipped with a slit type relief valve 7 inserted in the second flow path 14 and a ball type on-off valve 9 to control the flow of These on-off valves 8,
The moving directions F 1 and F 2 of the valve bodies 8c and 9c at 9 are parallel to each other and parallel to the center line L of the shunt body 1.
また、ボール式開閉弁８，９の弁室８ｂ，９ｂ
に面する弁座８ａ，９ａの向きが、弁体８ｃ，９
ｃの移動方向F1，F2から中央へ向けて傾くよう
に設定されている。 In addition, the valve chambers 8b and 9b of the ball type on-off valves 8 and 9
The orientation of the valve seats 8a, 9a facing the valve bodies 8c, 9
It is set to tilt toward the center from the moving directions F 1 and F 2 of c.
ボール式開閉弁８の軟質壁面１ａの外壁面１ｂ
には、第１〜４図に示すように、開閉弁開放位置
（同図中に実線で示す位置）における弁体８ｃの
中心からθ1度（ここでは、45゜）上方へ仰ぐ角度
を有して、閉鎖位置とは反対側に、半球状の玉突
き用突起（プツシユロツド）２０が突出形成され
ている。 Outer wall surface 1b of soft wall surface 1a of ball type on-off valve 8
As shown in Figures 1 to 4, the valve has an angle of θ 1 degree (here, 45 degrees) upward from the center of the valve body 8c in the on-off valve open position (the position indicated by the solid line in the figure). A hemispherical push rod 20 is formed protrudingly on the side opposite to the closed position.
また、軟質壁面１ａの外壁面１ｂには、開閉弁
閉鎖位置（同図中に２点鎖線で示す位置）におけ
る弁体８ｃの中心からθ2度（ここでは、45゜）上
方へ仰ぐ角度を有して、開放位置とは反対側に、
半球状の玉突き用突起（プツシユロツド）２１が
突出形成されている。 In addition, the outer wall surface 1b of the soft wall surface 1a has an angle of θ 2 degrees (here, 45 degrees) upward from the center of the valve body 8c in the on-off valve closed position (the position indicated by the two-dot chain line in the figure). on the opposite side from the open position,
A hemispherical push rod 21 is formed to protrude.
さらに、ボール式開閉弁９の軟質壁１ａの外壁
面１ｂにも、ボール式開閉弁８とほぼ同様に、玉
突き用突起２０，２１が突出形成されている。 Further, on the outer wall surface 1b of the soft wall 1a of the ball type on-off valve 9, dowel protrusions 20 and 21 are formed to protrude, almost similarly to the ball type on-off valve 8.
本考案の実施例としての開閉弁付き脳室シヤン
トは上述のごとく構成されているので、第１９図
に示すように、可動球状弁体８ｃ，９ｃをそれぞ
れ開閉弁開放位置に移動させると、患者の脳室か
ら脳室カテーテル２を通つてリザーバ１１へ流入
してきた髄液が、主通路１０ならびに第１および
第２の流路１３，１４を通過して弁室８ｂ，９ｂ
内に入り、２つの開放状態の開閉弁８，９を通過
してリリーフ弁６，７の上流側に入る。 Since the ventricular shunt with an on-off valve as an embodiment of the present invention is constructed as described above, when the movable spherical valve bodies 8c and 9c are respectively moved to the on-off valve open position, cerebrospinal fluid flowing into the reservoir 11 from the ventricle of the brain through the ventricular catheter 2 passes through the main passage 10 and the first and second flow passages 13, 14 to the valve chambers 8b, 9b.
The air passes through the two open-close valves 8 and 9 and enters the upstream side of the relief valves 6 and 7.
このとき、リリーフ弁６，７の上流側髄液の圧
力と下流側髄液の圧力との差が所定以上であれ
ば、リリーフ弁６，７は開放状態となり、小室１
２に髄液が流出し、この小室１２内の髄液は、さ
らに腹腔カテーテル３を通つて、患者の腹腔や心
房内へ流入する。 At this time, if the difference between the pressure of the cerebrospinal fluid upstream of the relief valves 6 and 7 and the pressure of the cerebrospinal fluid downstream of the relief valves 6 and 7 is equal to or greater than a predetermined value, the relief valves 6 and 7 become open, and the small chamber 1
The cerebrospinal fluid flows into the small chamber 12, and the cerebrospinal fluid in the small chamber 12 further flows into the patient's abdominal cavity and atrium through the peritoneal catheter 3.
このようにして、脳室からの髄液は、２つのリ
リーフ弁６，７の各規制流量の和（Q1＋Q2）と
しての最大流量で流れる。 In this way, the cerebrospinal fluid from the ventricle flows at the maximum flow rate as the sum (Q 1 +Q 2 ) of the respective regulated flow rates of the two relief valves 6 and 7.
次に、流量を中程度のQ1にしたい場合、第１，
５，７図中に実線で示すように、可動球状弁体８
ｃを開閉弁開放位置に移動させて第１の開閉弁８
を開放させるとともに、可動球状弁体９ｃを開閉
弁閉鎖位置に移動させて同第２の開閉弁９を閉鎖
させればよく、これにより髄液は規制流量の比較
的大きい第１のリリーフ弁６のみを通つて流れ
る。 Next, if you want the flow rate to be medium Q 1 , the first,
As shown by the solid line in Figures 5 and 7, the movable spherical valve body 8
c by moving the on-off valve to the open position and opening the first on-off valve 8.
At the same time, the movable spherical valve body 9c is moved to the on-off valve closing position to close the second on-off valve 9. This allows the cerebrospinal fluid to flow through the first relief valve 6, which has a relatively large regulated flow rate. only flows through.
また流量を一層小さいQ2にしたい場合には、
第１，５，７図中に２点鎖線で示すように、可動
球状弁体８ｃを開閉弁閉鎖位置に移動させて第１
の開閉弁８を閉鎖させるとともに、可動球状弁体
９ｃを開閉弁開放位置に移動させて第２の開閉弁
９を閉鎖させればよく、これにより髄液は規制流
量の比較的小さい第２のリリーフ弁７のみを通つ
て流れることができる。 Also, if you want to make the flow rate even smaller, Q2 ,
As shown by the two-dot chain line in Figures 1, 5, and 7, the movable spherical valve body 8c is moved to the open/close valve closing position and
The second on-off valve 9 can be closed by closing the second on-off valve 8 and moving the movable spherical valve body 9c to the on-off valve open position. It can only flow through the relief valve 7.
上述のごとく、本実施例では第１のリリーフ弁
６と第２のリリーフ弁７とが相互に異なる規制流
量を有しているので、２個のリリーフ弁６，７に
より３段階の流量切替えが行なわれるが、両リリ
ーフ弁６，７が同一の規制流量を有している場合
でも、その一方のみに流通させる場合と、両方に
流通させる場合との２段階の流量切替えを行なう
ことができる。 As mentioned above, in this embodiment, the first relief valve 6 and the second relief valve 7 have different regulated flow rates, so the two relief valves 6 and 7 can switch the flow rate in three stages. However, even if both relief valves 6 and 7 have the same regulated flow rate, the flow rate can be switched in two stages: when the flow is allowed to flow to only one of them, and when the flow is allowed to flow to both.
この脳室シヤントを経由する髄液の流出を停止
させたい場合には、可動球状弁体８ｃ，９ｃをそ
れぞれ開閉弁閉鎖位置へ移動させて第１および第
２の開閉弁８，９をともに閉鎖して、それぞれリ
ザーバ１１から主通路１０と第１および第２の流
路１３，１４とを通じてリリーフ弁６，７へ至る
髄液の流れをともに遮断すればよい。 When it is desired to stop the outflow of cerebrospinal fluid via this ventricular shunt, the movable spherical valve bodies 8c and 9c are moved to the on-off valve closing position, and both the first and second on-off valves 8 and 9 are closed. Then, the flow of cerebrospinal fluid from the reservoir 11 to the relief valves 6 and 7 through the main passage 10 and the first and second passages 13 and 14, respectively, may be blocked.
球状弁体８ｃ，９ｃは、前述のごとく位置保持
用突起８ｄ，８ｅ，８ｆ，９ｄ，９ｅ，９ｆによ
り弁室内壁面１ｃから離隔して保持されるので、
弁開放位置および弁閉鎖位置の相互間で適切に移
動できるようになり、球状弁体８ｃ，９ｃを長期
間にわたり作動させない場合でも、同弁体８ｃ，
９ｃが弁室内壁面に接着されてしまうようなこと
はなく、各弁体８ｃ，９ｃと弁室内壁面１ｃとの
摩擦も小さくなつて、各弁体８ｃ，９ｃの移動が
スムーズに行なわれるのである。 As mentioned above, the spherical valve bodies 8c and 9c are held apart from the valve chamber wall surface 1c by the position holding projections 8d, 8e, 8f, 9d, 9e, and 9f.
The spherical valve bodies 8c, 9c can now be moved appropriately between the valve open position and the valve closed position, even when the spherical valve bodies 8c, 9c are not operated for a long period of time.
9c is not glued to the wall surface of the valve chamber, and the friction between each valve body 8c, 9c and the wall surface 1c of the valve chamber is reduced, allowing each valve body 8c, 9c to move smoothly. .
また、この実施例では、第１６〜１９図に示す
ように、弁体８ｃ，９ｃを開閉弁閉鎖位置から開
閉弁開放位置へ向けて移動させる際に、軟質壁１
ａの内壁面に付設された玉突き用突起２１を頭皮
１６越しに指１８で押圧し、クリツクストツプ用
２段構成の小突起８ｅ，９ｅを乗り越えて弁体８
ｃ，９ｃを移動させればよい。 In this embodiment, as shown in FIGS. 16 to 19, when the valve bodies 8c and 9c are moved from the on-off valve closed position to the on-off valve open position, the soft wall 1
Press the projection 21 attached to the inner wall surface of the valve body 8 with your fingers 18 through the scalp 16, climb over the two-stage small projections 8e and 9e for the click stop, and press the valve body 8.
What is necessary is to move c and 9c.
さらに、弁体８ｃ，９ｃを開閉弁開放位置から
開閉弁閉鎖位置へ向けて移動させる際には、軟質
壁１ａの内壁面に付設された玉突き用突起２０を
頭皮１６越しに指１８で押圧し、クリツクストツ
プ用２段構成の小突起８ｅ，９ｅを乗り越えて弁
体８ｃ，９ｃを移動させればよい。 Furthermore, when moving the valve bodies 8c and 9c from the on-off valve open position to the on-off valve closed position, push the dowel protrusion 20 attached to the inner wall surface of the soft wall 1a with the finger 18 through the scalp 16. , the valve bodies 8c, 9c may be moved over the two-stage small projections 8e, 9e for the click stop.
このように、玉突き用突起２０，２１を押圧す
れば、弁室８ｂ，９ｂの外壁面１ｂの突起取付位
置が押され、この突起取付位置に対向する内壁面
１ｃが弁体８ｃへ向けて突出される。 In this way, when the protrusions 20 and 21 are pressed, the protrusion mounting positions on the outer wall surface 1b of the valve chambers 8b and 9b are pushed, and the inner wall surface 1c opposite to this protrusion mounting position protrudes toward the valve body 8c. be done.
このとき、弁体８ｃが、あたかもキユー等の棒
状体で突かれたような力を受ける一方、軟質壁１
ａへ加わる力が少なくなるので、小さな押圧力で
弁体８ｃを移動させることができる。 At this time, the valve body 8c receives a force as if it were being poked by a rod-shaped object such as a cue, while the soft wall 1
Since the force applied to a is reduced, the valve body 8c can be moved with a small pressing force.
しかも、２段構成の小突起８ｅにより、開放位
置と閉鎖位置との間で区切りよく弁体８ｃの移動
が行なわれて、常時支持されている状態において
も内壁面１ｃから離隔しているので、弁体８ｃと
内壁面１ｃとの摩擦も小さく移動もスムーズに行
なわれる。すなわち、移動の際には、弁体８ｃ，
９ｃと軟質壁１ａの内壁面１ｃとの隙間へ髄液が
出入することにより、弁体８ｃ，９ｃが移動しや
すい。 Moreover, the two-stage small protrusion 8e allows the valve body 8c to move with good separation between the open position and the closed position, and is spaced apart from the inner wall surface 1c even when it is always supported. The friction between the valve body 8c and the inner wall surface 1c is small, and movement is performed smoothly. That is, when moving, the valve body 8c,
As cerebrospinal fluid flows into and out of the gap between 9c and the inner wall surface 1c of the soft wall 1a, the valve bodies 8c, 9c are easily moved.
また、本実施例によれば、弁体８ｃ，９ｃの移
動方向F1，F2が相互に平行となるように構成さ
れているので、開閉弁８，９の開閉状態を頭皮１
６を通じて視認ないし触認しやすい。 Further, according to this embodiment, since the moving directions F 1 and F 2 of the valve bodies 8c and 9c are configured to be parallel to each other, the opening and closing states of the on-off valves 8 and 9 can be controlled by the scalp.
It is easy to see or feel through 6.
小室１２の中心部と開閉弁閉鎖位置における弁
体８ｃ，９ｃの中心位置とをそれぞれ直線で結ぶ
ように第１の流路１３，１４が形成されていて、
開閉弁閉鎖位置から弁体８ｃ，９ｃの移動方向上
を開閉弁開放位置とは逆の向きへ辿ると、すぐシ
ヤント本体１の外壁をなす軟質後壁１ｄが配置さ
れていて、この軟質後壁１ｄに、玉突き用突起２
１が付設されているのである。 First channels 13 and 14 are formed so as to connect the center of the small chamber 12 and the center of the valve bodies 8c and 9c in the on-off valve closed position with a straight line, respectively.
If you follow the direction of movement of the valve bodies 8c, 9c from the on-off valve closed position in the direction opposite to the on-off valve open position, you will immediately see a soft rear wall 1d forming the outer wall of the shunt body 1. 1d, protrusion 2 for doweling
1 is attached.
また、このような流量切替部を１個または３個
以上にして、相互に異なる規制流量に設定しても
よく、例えば、順次最小流量Ｑに関し、ｎを自然
数とする２倍に設定された規制流量をもたせれ
ば、（2n−１）段階の流量切替えを行なうことが
できる。 Further, one or three or more such flow rate switching units may be used to set mutually different regulated flow rates. For example, with respect to the minimum flow rate Q, the regulation set to twice where n is a natural number may be set sequentially. If a flow rate is provided, the flow rate can be switched in (2 n -1) steps.
なお、上述の実施例において、リリーフ弁６，
７に替えて流量の異なるオリフイスを配設しても
よく、この場合、第１および第２の流路１３，１
４にそれぞれ逆止弁を介挿したり、主通路１０に
単一の逆止弁を介挿することが行なわれる。 In addition, in the above-mentioned embodiment, the relief valve 6,
7 may be replaced with orifices having different flow rates; in this case, the first and second flow paths 13, 1
A check valve may be inserted into each of the main passages 4 or a single check valve may be inserted into the main passage 10.
また、弁体８ｃ，９ｃの移動方向F1，F2がシ
ヤント本体１の中心線Ｌに対し直交するように第
１および第２の流量切替部５ａ，５ｂを構成して
もよい。 Further, the first and second flow rate switching sections 5a and 5b may be configured such that the moving directions F 1 and F 2 of the valve bodies 8c and 9c are orthogonal to the center line L of the shunt body 1.
なお、玉突き用突起として、第２０図に示すよ
うな先端のなめらかな棒状体２０′，２１′や第２
１図に示すきのこ状のもの２０″，２１″や、円柱
状等の柱状体を用いてもよい。 In addition, as the protrusion for doweling, rod-shaped bodies 20' and 21' with smooth tips as shown in FIG.
Mushroom-shaped objects 20'' and 21'' shown in FIG. 1 or columnar objects such as cylinders may also be used.
また、クリツクストツプ用突起として、１段構
成のものを用いてもよく、小突起８ｆはこれを設
けなくともよい。 Furthermore, a one-stage structure may be used as the click stop protrusion, and the small protrusion 8f may not be provided.
以上詳述したように、本考案の開閉弁付き脳室
シヤントによれば、シヤント本体の内部の流路に
おける開閉弁の弁室内で、位置保持用突起により
球状弁体が支持されるので、開閉弁開放位置と開
閉弁閉鎖位置との間で適切に球状弁体の移動が行
なわれるようになり、球状弁体を長期間にわたり
作動させない場合においても、同弁体が弁室の内
壁面から離隔しているので、弁室内壁面に弁体が
接着されてしまうようなことはなく、弁体と弁室
内壁面との摩擦も小さくなつて、弁体の移動がス
ムーズに行なわれる利点がある。このようにし
て、脳室シヤントにおけるボール式開閉弁の球状
可動弁体の移動および停止が的確に行なわれるよ
うになり、弁体を開閉弁開放位置または開閉弁閉
鎖位置に安定よく支承させうる利点がある。
As described in detail above, according to the ventricular shunt with an on-off valve of the present invention, the spherical valve body is supported by the position-holding protrusion in the valve chamber of the on-off valve in the flow path inside the shunt body, so that it can be opened and closed. The spherical valve body now moves appropriately between the valve open position and the open/close valve closed position, and even when the spherical valve body is not operated for a long period of time, the valve body is separated from the inner wall surface of the valve chamber. Therefore, there is no possibility that the valve body is glued to the inner wall surface of the valve chamber, and the friction between the valve body and the inner wall surface of the valve chamber is reduced, which has the advantage that the valve body can move smoothly. In this way, the spherical movable valve body of the ball-type on-off valve in the ventricular shunt can be accurately moved and stopped, and the advantage is that the valve body can be stably supported in the on-off valve open position or the on-off valve closed position. There is.
第１〜２１図は本考案の一実施例としての開閉
弁付き脳室シヤントを示すもので、第１図はその
要部縦断面図（第７図の−矢視断面図）、第
２〜４図はそれぞれその外形を示す平面図、側面
図、後面図、第５図はその上部を除去して示す下
部の平面図（第６図の−矢視断面図）、第６
図はその縦断面図（第５図の−矢視断面図）、
第７図は第５図の要部拡大断面図、第８図はその
半部を破断して示すリリーフ弁付き部材の平面
図、第９図は第７図の−矢視断面図、第１０
図は第７図の−矢視断面図、第１１図は第７
図のXI−XI矢視断面図、第１２図は第５図のXII−
XII矢視断面図、第１３図は第５図の−矢
視断面図、第１４図は第５図の−矢視断
面図、第１５図は第５図の要部断面図、第１６〜
１９図はいずれも第１図に対応させてその埋設時
における作用を説明するための模式図、第２０，
２１図はそれぞれ玉突き用突起の変形例を示すシ
ヤント本体の後部側面図であり、第２２，２３図
は従来の開閉弁付き脳室シヤントを示すもので、
第２２図はその縦断面図、第２３図はその平面図
である。
１……シヤント本体（中継室）、１Ａ……上部、
１Ｂ……下部、１ａ……軟質壁、１ｂ……外壁
面、１ｃ……内壁面、１ｄ……軟質後壁、２……
脳室カテーテル、２ａ……ジヨイント、３……腹
腔カテーテル、３ａ……ジヨイント、４……逆止
弁、５……流量切替機構、５ａ……第１の流量切
替部、５ｂ……第２の流量切替部、６……第１の
流量調整部としてのスリツト式リリーフ弁、６ａ
……スリツト、７……第２の流量調整部としての
スリツト式リリーフ弁、７ａ……スリツト、８…
…第１の開閉弁としてのボール式開閉弁、８ａ…
…円形弁座、８ｂ……弁室、８ｃ……可動球状弁
体、８ｄ……開閉弁閉鎖位置保持用小突起、８ｅ
……２段構成の位置保持およびクリツクストツプ
兼用小突起、８ｆ……開閉弁開放位置保持用小突
起、９……第２の開閉弁としてのボール式開閉
弁、９ａ……円形弁座、９ｂ……弁室、９ｃ……
可動球状弁体、９ｄ……開閉弁閉鎖位置保持用小
突起、９ｅ……２段構成の位置保持およびクリツ
クストツプ兼用小突起、９ｆ……開閉弁開放位置
保持用小突起、１０……主通路、１０ａ……分岐
部、１１……リザーバ、１２……小室、１３……
第１の流路、１４……第２の流路、１５……縫糸
貫通孔、１６……頭皮、１７……頭蓋骨、１８…
…指、１９……リリーフ弁付き部材、２０，２
０′，２０″，２１，２１′，２１″……玉突き用突
起、Ｌ……中心線。
1 to 21 show a ventricular shunt with an on-off valve as an embodiment of the present invention. Figure 4 is a plan view, side view, and rear view showing the external shape, Figure 5 is a plan view of the lower part with the upper part removed (cross-sectional view taken along the - arrow in Figure 6), and Figure 6 is a plan view of the lower part with the upper part removed.
The figure is a longitudinal cross-sectional view (cross-sectional view taken along the - arrow in Figure 5),
FIG. 7 is an enlarged sectional view of the main part of FIG. 5, FIG. 8 is a plan view of the member with a relief valve shown in half broken away, FIG. 9 is a sectional view taken along the - arrow in FIG. 7, and FIG.
The figure is a sectional view taken along the - arrow in Figure 7, and Figure 11 is a cross-sectional view of Figure 7.
XI-XI arrow sectional view in the figure, Figure 12 is XII-XI in Figure 5.
13 is a sectional view taken along the - arrow of FIG. 5, FIG. 14 is a sectional view taken along the - arrow of FIG.
Fig. 19 is a schematic diagram corresponding to Fig. 1 to explain the action at the time of burial; Fig. 20;
Fig. 21 is a rear side view of the shunt main body showing a modified example of the protrusion for doweling, and Figs. 22 and 23 show a conventional ventricular shunt with an on-off valve.
FIG. 22 is a longitudinal sectional view thereof, and FIG. 23 is a plan view thereof. 1... Shunt body (relay room), 1A... Upper part,
1B... Lower part, 1a... Soft wall, 1b... Outer wall surface, 1c... Inner wall surface, 1d... Soft rear wall, 2...
Ventricular catheter, 2a... joint, 3... peritoneal catheter, 3a... joint, 4... check valve, 5... flow rate switching mechanism, 5a... first flow rate switching section, 5b... second Flow rate switching unit, 6...Slit type relief valve as a first flow rate adjustment unit, 6a
...Slit, 7...Slit type relief valve as a second flow rate adjustment section, 7a...Slit, 8...
...Ball type on-off valve as the first on-off valve, 8a...
...Circular valve seat, 8b...Valve chamber, 8c...Movable spherical valve body, 8d...Small protrusion for holding open/close valve closed position, 8e
...Small protrusion that serves as a two-stage position holding and click stop, 8f...Small protrusion for holding the on-off valve open position, 9...Ball type on-off valve as second on-off valve, 9a...Circular valve seat, 9b... Valve chamber, 9c...
Movable spherical valve body, 9d...Small protrusion for holding the on-off valve in the closed position, 9e...Small protrusion for holding the two-stage configuration and also serving as a click stop, 9f...Small protrusion for holding the on-off valve in the open position, 10...Main Passageway, 10a...branch, 11...reservoir, 12...small room, 13...
First channel, 14... Second channel, 15... Suture through hole, 16... Scalp, 17... Skull, 18...
...Finger, 19... Member with relief valve, 20,2
0', 20'', 21, 21', 21''...Protrusion for doweling, L...Center line.
Claims (1)
排出しうる脳室カテーテルと、腹腔または心房に
先端部を挿し込まれて同腹腔または心房へ上記髄
液を送出しうる腹腔カテーテルまたは心房カテー
テルと、上記脳室カテーテルの基端部と上記の腹
腔カテーテルまたは心房カテーテルの基端部とに
それぞれ接続されて各カテーテルを連通させるシ
ヤント本体とをそなえた脳室シヤントにおいて、
上記の腹腔カテーテルまたは心房カテーテルから
上記脳室カテーテルへの髄液の逆流を防止しうる
逆止弁をそなえ、上記シヤント本体に、上記脳室
カテーテルから上記の腹腔カテーテルまたは心房
カテーテルへ髄液を送るための流路と、同流路に
介挿され同流路を遮断しうる開閉弁とが設けら
れ、同開閉弁が、上記シヤント本体の壁面に形成
された弁座と、同弁座よりも上流側の上記シヤン
ト本体に形成された弁室と、上記シヤント本体の
外側からの駆動力を受けて上記弁座に整合する開
閉弁閉鎖位置と上記弁座に整合しない開閉弁開放
位置との間で移動しうるように上記弁室に封入さ
れた球状可動弁体とをそなえたボール式開閉弁と
して構成されて、上記開閉弁閉鎖位置または上記
開閉弁開放位置における上記弁室の内壁面から上
記球状可動弁体を離隔して保持すべく同内壁面に
位置保持用突起が設けられたことを特徴とする、
開閉弁付き脳室シヤント。 A ventricular catheter whose tip is inserted into the ventricle of the brain to drain cerebrospinal fluid from the ventricle, and a peritoneal catheter whose tip is inserted into the peritoneal cavity or atrium to drain the cerebrospinal fluid to the peritoneal cavity or atrium. or a ventricular shunt comprising an atrial catheter and a shunt body that is connected to the proximal end of the ventricular catheter and the proximal end of the peritoneal catheter or the atrial catheter, respectively, to communicate the catheters,
A check valve capable of preventing backflow of cerebrospinal fluid from the peritoneal catheter or atrial catheter to the ventricular catheter is provided, and the cerebrospinal fluid is sent from the ventricular catheter to the peritoneal catheter or the atrial catheter to the shunt body. and an on-off valve that is inserted into the flow path and can shut off the flow path, and the on-off valve has a valve seat formed on the wall surface of the shunt main body, and a valve seat that is lower than the valve seat. Between the valve chamber formed in the shunt body on the upstream side and the shut-off position of the shut-off valve, which receives a driving force from the outside of the shunt body and aligns with the valve seat, and the open position of the shut-off valve, which does not align with the valve seat. The valve is configured as a ball type on-off valve having a spherical movable valve body enclosed in the valve chamber so as to be movable from the inner wall surface of the valve chamber in the on-off valve closed position or the on-off valve open position. A position holding protrusion is provided on the inner wall surface of the valve body to hold the spherical movable valve body apart.
Ventricular shunt with on-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987065386U JPH0344207Y2 (en) | 1987-04-30 | 1987-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987065386U JPH0344207Y2 (en) | 1987-04-30 | 1987-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63158347U JPS63158347U (en) | 1988-10-17 |
| JPH0344207Y2 true JPH0344207Y2 (en) | 1991-09-17 |
Family
ID=30902408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987065386U Expired JPH0344207Y2 (en) | 1987-04-30 | 1987-04-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344207Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014515947A (en) * | 2011-05-06 | 2014-07-07 | サノフィ−アベンティス・ドイチュラント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Needle hub and valve for needle hub |
-
1987
- 1987-04-30 JP JP1987065386U patent/JPH0344207Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63158347U (en) | 1988-10-17 |
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