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:
Apr. 04, 2000
Filed:
Aug. 01, 1997
Jonathan A Eppstein, Atlanta, GA (US);
Mark A Samuels, Norcross, GA (US);
Keith D Ignotz, Duluth, GA (US);
Gregory J Newman, Atlanta, GA (US);
SpectRx, Inc., Norcross, GA (US);
Abstract
A system and method for calibrating a measurement instrument prior to making a measurement on a material or tissue includes utilizing a removable calibration device to calibrate the instrument, then removing a target portion of the calibration device so that a measurement may be performed. The calibration device may include an index matching agent, such as a gel, that is to be interposed between the patient's skin and an output end of the measuring instrument. A method embodying the invention may include making a bilirubin concentration measurement on a skin of a patient by measuring the amplitude of light reflected from the patient's skin at first and second wavelengths indicative of a blood content of the patient's skin, and measuring the amplitude of reflected light at a third wavelength indicative of an uncorrected bilirubin concentration, then calculating a corrected bilirubin concentration based on the three measurements. The method may also include taking measurements at fourth and fifth wavelengths indicative of a melanin content of the patient's skin, and calculating the bilirubin concentration based on the fourth and fifth measurements.