Arterial blood velocity to volume flow converter
US4667678A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1985 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Aug 28, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P1/103
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A arterial blood velocity-to-volume flow rate converter, including a pair of function generators a computer, and a multiplier, is incorporated within a system to objectively measure by non-invasive means the blood volume flow rate to the head of an occupant in a rapidly accelerating vehicle, and take corrective measures to stabilize the vehicle when that flow falls below a preselected lower limit for a predetermined length of time. A conventional ultrasonic Doppler velocimeter determines the blood velocity, subsequently feeding a representative signal to pressure function generator. The output therefrom is then fed to a cross-sectional area signal generator which determines the time-varying area of the artery, a signal representing such being fed to the multiplier along with the velocity signal to compute the flow. When that flow falls below a pre-selected lower limit for a predetermined length of time as determined by a comparator and timer, a command signal is sent to override circuitry to stablize the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.