Method and device for positioning a Doppler ultrasound transducer for blood flow measurement and a system for blood flow measurement
US9775583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2012 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Aug 18, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/0891
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The method of positioning a Doppler ultrasound transducer for performing blood flow measurement according to the invention comprises the steps of: detecting a pressure oscillation signal from an inflated cuff placed on patient's artery; detecting an ultrasound pulse signal from the Doppler ultrasound transducer placed along the artery; deriving a first signal from the pressure oscillation signal and the ultrasound pulse signal, the first signal indicating the degree of synchronization between the pressure oscillation signal and the ultrasound pulse signal; and outputting an indication signal to indicate the Doppler ultrasound transducer is in a desired position when the first signal satisfies a predefined condition. Since the synchronization property of the cuff pressure oscillation signal and the ultrasound signal caused by the blood flow is utilized to determine whether the transducer is well positioned or not, ultrasound signal, which is a pulse signal but not reflecting the blood flow of the artery, could be determined as not in synchronization with the oscillation signal and therefore the accuracy of the positioning could be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.