Biometric measurement apparatus
US8466694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2010 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Aug 31, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14535
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A biometric measurement apparatus has a measurement unit for measuring bioelectric impedance of different parts of a body and hematocrit. The measurement unit has impedance calculators (IPG1, IPG2) for measuring the impedance of tissues and blood of a living body with a first frequency to output as a first impedance (Z1), and for measuring the impedance of the tissues and blood of the living body with a second frequency to output as a second impedance (Z2), and has pulse wave analyzing units (MS1 and MS2) for analyzing differences of the first impedance between a first time and a second time and difference (ΔZH) of the second impedance between the first time and the second time, and a hematocrit calculator (245) for calculating hematocrit based on the difference (ΔZL) of the first impedance and the difference (ΔZH) of the second impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.