Apparatus and method for in vitro detection of abnormal tissues
US4862092A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/4833
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tissue testing chamber having a hollow, electrically insulative housing separable into two parts or halves, each half including a plate-like working electrode and spaced therefrom an annular measuring electrode, with electrical leads provided to each of the electrodes for interconnection with external control and measuring equipment. Each housing half or test chamber half has a cavity communicating with both the working and measuring electrodes and an open end. The housing halves clamp the test specimen between them. A quantity of Ringer's solution is added to each housing cavity and the four electrodes are then connected in a four electrode impedance bridge with selectively variable impedances (e.g., capacitance) which on bridge balance provides capacitance of specimen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.