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:
Mar. 13, 2001
Filed:
Nov. 20, 1998
Jogin R. Wu, Durham, NC (US);
Mario Moreno, Raleigh, NC (US);
Akzo Nobel NV, Amhem, NL;
Abstract
A device and method for performing blood coagulation assays, particularly prothrombin times and activated partial thromboplastin times and other clotting parameters are disclosed. The device comprises a disposable strip (containing a sample inlet for sample delivery, a capillary channel for driving force, and a reaction chamber with an appropriate dry reagent for a specific assay) and a piezoelectric sensor. The device could also include a heating element for temperature control, and a magnetic bender. The magnetic bender is driven by an electromagnetic field generator and is attached onto a piezoelectric film in contact with the blood sample. Electric signal generated at the piezo film is characterized by its frequency and amplitude due to the movement of the attached metal film. The signal collected at the site of the piezo film represents the process of a biochemical reaction in the reaction chamber, while blood sample proceeds to the point at which clot formation starts and is amplified by an amplifier and rectified into a Dc voltage and is sent to a recording unit and/or display unit.