Tonometric measuring head and measuring method
US6432051B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/6853
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a tonometric measuring head for bringing a measuring medium to a composition consistent with an individual to be examined non-invasively through the outermost tissue layer. A measuring head comprises a sealed chamber, having a wall whose oppositely facing sides are essentially made of pliable membrane materials, at least one membrane material of said materials being permeable to a gas to be analyzed but effectively impermeable at least to solids and liquids, as well as a measuring medium in a cavity within the wall. The measuring head is provided with a guide member between the chamber and an external device. In addition, the chamber wall is partially constituted by a pliable second membrane material which is effectively impermeable both to a gas to be analyzed and to at least solids and liquids. The measuring head, along with its chamber, is flexible as a whole and areas, constituted by said membrane materials with considerably unequal permeabilities, are included in the oppositely facing sides. Thus, the composition of a measuring medium to be analyzed can be made asymmetrically dependent upon the body of only one individual in the contact conditions of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.