Claims
- 1. An implantable pressure sensor comprising:
- a silicone rubber vessel the walls of which include wax trapped within the silicone rubber, the silicone rubber completely encasing the wax;
- within said vessel, a filling of a non-toxic hydraulic fluid which is compatible with body fluids; and
- coupled to said vessel, means for accomodating fluid displaced from said vessel when said vessel is subjected to pressure.
- 2. An implantable pressure sensor as set forth in claim 1 wherein said fluid is a radio-opaque injection contrast media.
- 3. An implantable pressure sensor comprising:
- a silicone rubber vessel the walls of which include beeswax trapped within the silicone rubber, the silicone rubber being in tension around the beeswax;
- within said vessel, a filling of the liquid, Lipiodol F; and
- coupled to said vessel, means for accomodating fluid displaced from said vessel when said vessel is subjected to pressure.
Parent Case Info
This is a division of application Ser. No. 474,518 filed May 30, 1974, now U.S. Pat. No. 3,877,137.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
70,354 |
Nov 1915 |
DD |
Divisions (1)
|
Number |
Date |
Country |
Parent |
474518 |
May 1974 |
|