Ocular plethysmograph
US4141346A · kind A · utility
7Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1977 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Feb 7, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved ocular plethysmograph for use in conjunction with known pulse volume recorders, and offering increased performance and simplicity as well as lower cost of manufacture. The device employs a means whereby a large DC pressure signal is cancelled across a very sensitive DC pressure transducer employed to detect directly the tiny pressure fluctuations resulting from minute volume plethysmic changes of the human ocular globe. The means employed provides secondary advantages in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.