The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 1996
Filed:
Mar. 28, 1994
Setsuo Takatani, Houston, TX (US);
Hiroshi Sakai, Komaki, JP;
Colin Corporation, Aichi, JP;
Abstract
An apparatus for evaluating a peripheral blood flow of a living subject, including a reflection-type pulse wave detecting device including two pairs of light-emitting and light-receiving elements provided such that a distance between the light-emitting and light-receiving elements of one pair is different from that of the other pair; and a determining device for determining an attenuation coefficient of the light beam emitted by the light-emitting element of each pair, based on (a) an intensity of the light beam which is emitted by the light-emitting element of each pair and (b) an intensity of the light which has been emitted from the light-emitting element of each pair, reflected from skin of the subject, and subsequently received by the light-receiving element of each pair. The apparatus further includes an evaluating device for evaluating peripheral blood flow of the subject, based on a ratio of the attenuation coefficient of the light beam emitted by the light-emitting element of one pair to the attenuation coefficient of the light beam emitted by the light-emitting element of the other pair, and/or, a display which displays a change of the ratio of the attenuation coefficient of the light beam emitted by the light-emitting element of one pair to the attenuation coefficient of the light beam emitted by the light-emitting element of the other pair.