Apparatus for measuring vascular viscoelasticity index
US8251910B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 7, 2007 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Jun 7, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention is directed to provide an apparatus for measuring a vascular viscoelasticity index which is noninvasive, simple in structure and yet inexpensive.The present invention provides an apparatus for measuring a vascular viscoelasticity index, which measures a vascular viscoelasticity index α by a formula α={(Pb2−Pa2)−(Pb1−Pa1)}/(Va2−Va1) wherein Pb1 is the maximal value of the first pulse wave; Va1 is the local maximum value of a time derivative value of the first pulse wave; Pa1 is the pulse wave amplitude corresponding to the local maximum value Va1; Pb2 is the maximal value of the second pulse wave; Va2 is the local maximum value of a time derivative value of the second pulse wave; and Pa2 is the pulse wave amplitude corresponding to the local maximum value Va2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.