Spectrophotometers with catheters for measuring internal tissue

• US 6,134,460 A
• Filed: 10/15/1996
• Issued: 10/17/2000
• Est. Priority Date: 11/02/1988
• Status: Expired due to Term

• Current Assignee: Non-Invasive Technology Incorporated
• Original Assignee: Non-Invasive Technology Incorporated
• Inventors: Chance, Britton
• Primary Examiner(s): Shay, David M.
• Application Number:
  US08/731,443
• Time in Patent Office: 1,463 Days
• Field of Search: 600/310-344
• US Class Current: 600/342
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 2562/0242 for varying or adjusting the optical path length in the tissue
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/14553 specially adapted for cerebral tissue
• CPC Class Codes: A61B 5/1459 invasive, e.g. introduced into the body by a catheter A61B5/1464 takes precedence
• CPC Class Codes: A61B 5/6828 Leg
• CPC Class Codes: G01N 2021/1789 Time resolved
• CPC Class Codes: G01N 2021/3181 using LEDs
• CPC Class Codes: G01N 21/3151 using two sources of radiation of different wavelengths G01N21/33 - G01N21/39 take precedence
• CPC Class Codes: G01N 21/47 Scattering, i.e. diffuse reflection G01N21/25, G01N21/41 take precedence G01N21/55 takes precedence
• CPC Class Codes: G01N 21/4795 spatially resolved investigating of object in scattering medium in vivo A61B
• CPC Class Codes: G01N 21/49 within a body or fluid
• CPC Class Codes: G01N 2201/0696 Pulsed

Claims