Method for the direct measurement of at least one chemical parameter of skin using a biosensor
US5250419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1991 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Aug 13, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/817
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
This biosensor comprises a membrane (8), in which an enzyme catalyzing the transformation of a substrate used in the cutaneous metabolism is immobilized, means for detecting and measuring a phenomenon caused by said transformation, which is representative of the concentration of the substrate to be measured, with said substrate being brought into contact with the enzymatic membrane (8), and a measuring cell (13), a wall area of which is formed by the membrane (8) and which is capable of being closed, during the measurement, by a cutaneous covering area (15), with the cell (13) being combined with means for making circulate therein a liquid for placing in solution the substrate to be measured. For the measurement, the biosensor is applied to the skin, the buffer is injected into the cell and, once said cell is filled, the detection and the measurement are carried out, then the buffer is again made to circulate in order to remove the solubilized substrate. This measuring cycle can be repeated without removing the electrode (1). The biosensor is used for measurement of cutaneous L-lactate with a Clark electrode combined with a membrane using L-lactate oxidase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.