Title:
【発明の名称】体液成分レベルの生体内測定および制御のための埋込可能センサーおよびシステム
Document Type and Number:
Japanese Patent JP2000515778
Kind Code:
A
Abstract:
An in vivo implantable sensor obtains spectra of body fluid constituents and processes the spectra to determine the concentration of a constituent of the body fluid. The sensor includes an optical source and detector. The source emits light at a `plurality of different, discrete wavelengths, including at least one wavelength in the infrared region. The light interacts with the body fluid and is received at the detector. The light at the plurality of different wavelengths has a substantially collinear optical path through the fluid with respect to each other. When measuring fluid constituents in a blood vessel, such as blood glucose, the light at the plurality of different wavelengths is emitted in a substantially single period of time. The spectra is corrected for artifacts introduced from extraneous tissue in the optical path between the source and the detector. The sensor is fully implanted and is set in place to allow plural measurements to be taken at different time periods from a single in vivo position. The light source emits at at least three different wavelengths.
Inventors:
Crosal, Caesarin, Day.
Application Number:
JP50531898A
Publication Date:
November 28, 2000
Filing Date:
July 08, 1997
Export Citation:
Assignee:
Animas Corporation
International Classes:
A61B5/00; A61B5/1455; A61B5/145; A61B5/1459; A61B5/1495; G01N21/31; G01J3/02; G01N21/35; G01N21/39; (IPC1-7): A61B5/145
Attorney, Agent or Firm:
Ryuji Higashijima