Arterial-wall stiffness evaluation system
US9730594B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 17, 2008 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Sep 17, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/107
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An arterial-wall stiffness evaluation system of the present invention includes: a cuff to be attached to a part of a living body; a pressure sensor for detecting pressure in the cuff; a cuff-pressure control section for controlling the pressure in the cuff to be increased or decreased up to a predetermined value, based on a value detected by the pressure sensor; and a data processing section for calculating, based on pulse waves detected by the pressure sensor, pulse-wave amplitudes of cuff-pressure pulse waves and blood-pressure pulse waves, and for evaluating arterial-wall stiffness based on the pulse-wave amplitudes. The arterial-wall stiffness is evaluated by a pressure-diameter characteristic curve, which represents a relationship between vascular diameter and transmural pressure applied to a vascular wall, or by estimation from shapes and amplitudes of the detected pulse waves. Alternatively, the evaluation is performed by estimating, from the detected pulse waves, a differential function obtainable by differentiating a pressure-diameter characteristic curve with respect to a transmural pressure, or by use of an arctan or a sigmoid function. This allows anybody to easily eval…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.