A device by which the narrowed area in the pipe filled with fluid is evaluated

Title:

A device by which the narrowed area in the pipe filled with fluid is evaluated

Document Type and Number:

Japanese Patent JP6165634

Kind Code:

B2

Abstract:

An apparatus and method of assessing off-line a narrowing in a fluid filled tube being a blood vessel of a cyclic fluid flow system, in particular a cardiac environment, comprising: receiving from a storage device previously taken measurements of blood pressure on either side of the narrowing; identifying from the pressure-only measurements a time window when the differential of flow velocity (dU) is minimal or absent; deriving the backward- and forward-originating pressure components for pressure measurements for the time window, and deriving an instantaneous flow ratio as pressure ratio of pressures on either side of the narrowing by using the backward-originating and/or the forward-originating pressure components so as to provide an assessment of the severity of the narrowing.

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Inventors:

Davies, Helen Catherine Stewart
Justin, Davies

Application Number:

JP2013547911A

Publication Date:

July 19, 2017

Filing Date:

January 06, 2012

Export Citation:

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Assignee:

Medsolve Limited

International Classes:

A61B5/0215

Domestic Patent References:

JP2005291945A
JP2006513731A
JP2009136675A
JP2010046512A
JP2008528112A

Foreign References:

WO1999034724A2
US20040102806

Attorney, Agent or Firm:

Patent Services Corporation m&s Partners

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