| 54 |
Title |
TI |
[EN] Non-invasively adjustable valve |
| 71/73 |
Applicant/owner |
PA |
CORDIS CORP, US
|
| 72 |
Inventor |
IN |
HOOVEN MICHAEL D, US
|
| 22/96 |
Application date |
AD |
Jul 21, 1983 |
| 21 |
Application number |
AN |
51570083 |
|
Country of application |
AC |
US |
|
Publication date |
PUB |
Sep 10, 1985 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
US
46732683
19830217
|
| 51 |
IPC main class |
ICM |
A61M 27/00
|
| 51 |
IPC secondary class |
ICS |
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
A61M 27/006
F16K 15/144
|
|
MCD main class |
MCM |
|
|
MCD secondary class |
MCS |
A61M 27/00
(2006.01)
F16K 15/14
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[EN] A non-invasively adjustable intercranial pressure regulator valve and adjustment mechanism therefor which is adapted particularly for the treatment of hydrocephalus and the draining of cerebrospinal fluid (CSF) from a ventricle in the brain to another location in the patient's body. The valve includes a flexible diaphragm which is contacted on both sides by the CSF fluid. A valve seat on the diaphragm is movable with the diaphragm and a ball closure valve is positioned on the cephalad side of the diaphragm. The pressure differential of the CSF fluid across the diaphragm causes the valve seat to flex into and out of engagement with the ball closure valve. The force by which the ball closure valve and valve seat engage each other and, thereby, the pressure differential at which the CSF fluid will drain are adjusted by an adjustment means which includes a magnetic wrench which is both rotatable and longitudinally movable between a first active position in which the wrench may be rotated by a magnet outside of the patient's body to effect adjustment of the ball closure valve and a second inactive position in which the wrench is magnetically locked in its adjusted position. |
| 56 |
Cited documents identified in the search |
CT |
US000002879783A
US000003495620A
US000003768508A
US000003769982A
US000003886948A
US000003901245A
US000003985140A
US000003999553A
US000004106510A
US000004156422A
US000004332555A
US000004340038A
US000004443214A
US000004452423A
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
A61M 1/00 H
A61M 27/00
|
