System and a method for measurement and presentation of fluid flow movements, particularly the flow of blood through a body organ
US5339817A · kind A · utility
Inventor
Key dates
| Filing date | Apr 30, 1992 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Apr 30, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0261
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention is directed to a system for the measurement and presentation of flow movements in a fluid to determine blood perfusion in superficial blood vessels of a body organ. The system includes a laser light source (1) generating a laser beam, apparatus for directing the laser beam onto a body part to be examined and for guided movement of the beam over the body part. The beam is moved over the body part in a predetermined scanning pattern (8). The system further includes a receiving part for the beam reflected from the body part, and apparatus for detecting broadening of the frequency of a reflected light beam caused by a Doppler effect. This results in measuring the magnitude of superficial blood circulation in the body part (5) at points scanned by the beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.