Title:
BLOOD FLOW SENSOR
Document Type and Number:
WIPO Patent Application WO/2016/092681
Kind Code:
A1
Abstract:
This blood flow sensor 1 can measure the flow speed of blood B, and is provided with a tube 40 which defines a flow path 42 through which the blood B flows, a light-emitting element 10 which emits a laser beam L, and a light-receiving element 20. The light-emitting element 10 emits a laser beam L towards the blood B flowing through the tube 40. The light-receiving element 20 receives non-Doppler-shifted light which is emitted by the light-emitting element 10 and reflected by the tube 4, and Doppler-shifted light which is emitted by light-emitting element 10 and reflected by a blood component flowing through the tube 40. Defining a first direction and a second direction as two orthogonal directions in a cross-section perpendicular to the flow direction of the blood B, the width w1 of the flow path in a first direction is less than the width w2 in the second direction. The light-emitting element 10 and the light-receiving element 20 are arranged on the outer surface of the tube wall that defines the width w1 in the first direction.
Inventors:
GOMEI TOMOO (JP)
HIRA EIJI (JP)
TOMOYASU NAOTO (JP)
HIRA EIJI (JP)
TOMOYASU NAOTO (JP)
Application Number:
PCT/JP2014/082889
Publication Date:
June 16, 2016
Filing Date:
December 11, 2014
Export Citation:
Assignee:
AICHI TOKEI DENKI KK (JP)
International Classes:
A61B5/026; G01P5/26
Domestic Patent References:
| WO2013153664A1 | 2013-10-17 |
Foreign References:
| US20080200865A1 | 2008-08-21 | |||
| US4881413A | 1989-11-21 |
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
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