Method and apparatus for determination of left ventricular stroke volume and cardiac output using the arteries of the forearm
US9451888B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 2015 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Jun 2, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/4884
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus and method for determining stroke volume by bioimpedance from a person that includes two or more spaced apart alternating current flow electrodes positionable on a person's forearm, two or more spaced apart voltage sensing electrodes positionable on the person's forearm and between the alternating current flow electrodes, an alternating current source providing an alternating current to the current flow electrodes, a voltmeter configured to generate a voltage signal from a voltage sensed by the voltage sensing electrodes, and a processing unit configured to determine a stroke volume (SV) using the voltage signal and at least one of two equations that include, among other terms, the person's weight, a peak time rate of change of a transradioulnar impedance pulse variation (dZ/dtmax), a transradioulnar quasi-static base impedance (Z0), a systolic flow time (TSF), and a volume conductor (Vc).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.