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US 5,706,807 AGranted
Sensor device covered with foam membrane
AssigneeApplied Medical Research
InventorGeorge J. Picha
Life of this patent
Estimating the term…
Abstract
An implant is provided with an open-celled silicone elastomer foam outer layer. The implant may be formed by compressively deforming beads mixed with liquid elastomer in a mold containing a preformed support structure. The elastomer is cured and the beads dissolved out. Infusion and sensor catheters covered with the foam provide improved transport rates and faster response.
Claims7
A sensor device for sensing a characteristic of a bodily fluid, said device comprising:
- means for sensing said characteristic;
- a receptacle containing said sensing means, said receptacle having a bodily fluid admitting membrane;
- and
- a polymeric open-celled foam between 10 microns and 2,000 microns in thickness covering a substantial portion of said admitting membrane, said membrane having pits extending at least partially into said foam and at most 100 microns beyond said foam.
1 more element
A sensor device for sensing a characteristic of a bodily fluid, said device comprising:
- means for sensing said characteristic;
- a receptacle containing said sensing means, said receptacle having a bodily fluid admitting portion having a membrane having orifices;
- and
- a polymeric open-celled foam between 10 microns and 2,000 microns in thickness covering a substantial portion of said admitting portion, wherein said membrane has pits extending into said foam, said pits containing said orifices.
1 more element
Dependencies are inferred from the claim text.