JPS63158345U

JPS63158345U -

Info

Publication number: JPS63158345U
Application number: JP1987050826U
Authority: JP
Priority date: 1987-04-03
Filing date: 1987-04-03
Publication date: 1988-10-17
Also published as: JPH0344205Y2

Description

[Brief explanation of the drawing]

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―矢視断面図、第１２図は第５図の
―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……軟質壁面、１ｂ……外
表面、１ｃ……内表面、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、６
ａ……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、８
ｅ……２段構成のクリツクストツプ用小突起、８
ｆ……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、９
ｄ……開閉弁閉鎖位置保持用小突起、９ｅ……２
段構成のクリツクストツプ用小突起、９ｆ……開
閉弁開放位置保持用小突起、１０……主通路、１
０ａ……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
、２０，２０′，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 (a 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 cross-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, and FIG. 10
The figure is a sectional view taken in the direction of the - arrow in Figure 7, and Figure 11 is a cross-sectional view of Figure 7.
12 is a sectional view taken in the direction of the arrows in FIG. 5, FIG. 13 is a sectional view taken in the direction of the arrows in FIG.
15 is a cross-sectional view of the main part of FIG. 5; FIGS. 16 to 19 are schematic diagrams corresponding to FIG. 1 to explain the action during burial; FIGS. The figures are rear side views of the shunt main body showing modified examples of the protrusion for doweling, and Figures 22 and 23 show a conventional ventricular shunt with an on-off valve. The figure is a plan view thereof. 1... Shunt body (relay room), 1A... Upper part, 1B... Lower part, 1a... Soft wall surface, 1b... Outer surface, 1c... Inner 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 section, 6... first
Slit type relief valve as a flow rate adjustment part, 6
a...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 maintaining open/close valve closed position, 8
e...Two-stage small projection for click stop, 8
f...Small protrusion for holding open/close valve open position, 9...Second
Ball type on-off valve as an on-off valve, 9a...Circular valve seat, 9b...Valve chamber, 9c...Movable spherical valve body, 9
d...Small protrusion for holding open/close valve closed position, 9e...2
Small protrusion for click stop of stepped structure, 9f...Small protrusion for holding opening/closing valve open position, 10...Main passage, 1
0a... Branch, 11... Reservoir, 12... Small chamber, 13... First channel, 14... Second channel,
15... Suture through hole, 16... Scalp, 17... Skull, 18... Finger, 19... Member with relief valve, 20, 20', 20'', 21, 21', 21''
...Protrusion for ball striking, L...Center line.

Claims

[Scope of utility model registration request]

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 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. a flow rate adjusting section that is inserted in each of the flow paths and can adjust the flow rate in the communicating state of the flow path to a predetermined flow rate; An on-off valve that can be shut off is provided, and the on-off valve includes 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 shunt body. a spherical movable valve body enclosed in the valve chamber so as to be able to move between a closed valve position aligned with the valve seat and an open position not aligned with the valve seat in response to a driving force from the outside of the valve body; In order to selectively hold the spherical movable valve body in the on-off valve closed position or the on-off valve open position, a click stop protrusion is provided on the inner wall surface of the valve chamber. A ventricular shunt with an on-off valve, which is characterized by a protruding part.