Method and device for a blood velocity determination
US6261233A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1998 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jul 1, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of determining the velocity of a flowing material, suspended in a liquid and flowing in a conduit, including irradiating the conduit with ultrasonic waves, detecting first Doppler-shifted reflections of the waves from the material, which first reflections have a positive Doppler-shift, and detecting second Doppler shifted reflections of the waves from the material, which second reflections have a negative Doppler-shift. The flow velocity is estimated based on the extent of the positive and negative Doppler-shifts. The first and second reflections may be summed to form a composite signal and the range of Doppler-shifts in the composite signal is used to estimate the flow velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.