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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.:

US 10426387 B1

PDFFull Text
Date of Patent:
Oct. 01, 2019

Filed:

Jun. 24, 2016

Direct light differential measurement system

Applicant:

Fresenius Medical Care Holdings, Inc., Waltham, MA (US);

Inventor:

Louis L. Barrett, West Point, UT (US);

Assignee:

Fresenius Medical Care Holdings, Inc., Waltham, MA (US);

Attorney:

Leydig, Voit & Mayer, Ltd.

Primary Examiner:

Eric F Winakur

Assistant Examiner:

Chu Chuan Liu

Int. Cl.
CPC ...
A61B 5/1455 (2006.01); G01N 33/49 (2006.01); G01N 21/27 (2006.01); G01J 3/42 (2006.01); G01N 21/31 (2006.01); G01N 21/3577 (2014.01); G01N 15/06 (2006.01); G01J 3/02 (2006.01); G01J 3/28 (2006.01); G01J 1/02 (2006.01); A61B 5/00 (2006.01); G01N 15/00 (2006.01); G01J 1/44 (2006.01);
U.S. Cl.
CPC ...
A61B 5/1455 (2013.01); A61B 5/14557 (2013.01); G01J 1/0214 (2013.01); G01J 3/0205 (2013.01); G01J 3/28 (2013.01); G01J 3/42 (2013.01); G01N 15/06 (2013.01); G01N 21/274 (2013.01); G01N 21/314 (2013.01); G01N 21/3577 (2013.01); G01N 33/49 (2013.01); A61B 5/0022 (2013.01); A61B 2560/0223 (2013.01); G01J 2001/444 (2013.01); G01N 2015/0065 (2013.01); G01N 2015/0693 (2013.01); G01N 2201/062 (2013.01); G01N 2201/0624 (2013.01);
Abstract

A measurement system for measuring blood characteristics includes a controller, an emitter, a sensor, a reference photo sensor, and a mask. The emitter emits light at a plurality of wavelengths from a first side of a blood flow channel to a second side of the blood flow channel. The sensor is provided on the second side of the blood flow channel. The reference photo sensor is provided on the first side of the blood flow channel. The mask is provided on the first side blocking reflected light other than from the light from the emitter to enter the reference photo sensor. The controller compensates measurements from the sensor based upon measurements from the reference photo sensor.

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