Syringe for hematocrit and oxygen saturation blood analyzer

• US 5,249,584 A
• Filed: 11/07/1991
• Issued: 10/05/1993
• Est. Priority Date: 05/18/1990
• Status: Expired due to Fees

• Current Assignee: U.S. Alcohol Testing Of America, Inc. (Substance Abuse Technologies, Inc.)
• Original Assignee: U.S. Alcohol Testing Of America, Inc. (Substance Abuse Technologies, Inc.)
• Inventors: Velnosky, James C., Karkar, Maurice N.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Polutta, Mark O.
• Application Number:
  US07/789,088
• Time in Patent Office: 698 Days
• Field of Search: 604/187, 604/218, 604/232, 356/246, 356/39, 128/703, 128/765, 128/771
• US Class Current: 600/578
• CPC Class Codes: G01N 2015/055 for hematocrite determination
• CPC Class Codes: G01N 2021/3181 using LEDs
• CPC Class Codes: G01N 2021/4709 Backscatter
• CPC Class Codes: G01N 2035/1062 for testing the liquid while it is in the transfer device
• CPC Class Codes: G01N 21/0303 Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment G01N21/031 - G01N21/15 take precedence
• CPC Class Codes: G01N 21/51 inside a container, e.g. in an ampoule G01N21/53 takes precedence
• CPC Class Codes: G01N 33/4925 measuring blood gas content, e.g. O2, CO2 , HCO3

Abstract

An improved blood analyzing device is disclosed for measuring the hematocrit and oxygen saturation levels of a quantity of blood. The device is a syringe containing a single optical window insert into the tubular barrel.

Claims

1. A syringe comprising:

an elongate, tubular member having a proximal end, a distal end, and a hollow lumen extending longitudinally therethrough;

a needle disposed on said proximal end of said tubular member, said needle being in fluid communication with said lumen;

a flange formed on the distal end of said tubular member;

a piston insertable through said flange into the distal end of said tubular member, said piston being reciprocally movable within said lumen; and

a single optical window member having inner and outer surfaces, said window member being insert into said tubular member in a manner wherein said inner surface defines a portion of the lumen, and constructed of a material which provides a substantially transparent, repeatable optical light path from the exterior of the tubular member to the lumen.

2. The syringe of claim 1 wherein said window member has a rectangularly shaped configuration.

3. The syringe of claim 2 wherein said inner and outer surfaces have generally planar configurations.

4. The syringe of claim 2 wherein said outer surface has a convex configuration and said inner surface has a concave configuration.

5. The syringe of claim 2 wherein said outer surface has a concave configuration and said inner surface has a convex configuration.

6. The syringe of claim 2 wherein said outer surface has a convex configuration and said inner surface has a planar configuration.

7. The syringe of claim 2 wherein said outer surface has a concave configuration and said inner surface has a planar configuration.

8. The syringe of claim 2 wherein said inner and outer surfaces have concave configurations.

9. The syringe of claim 2 wherein said inner and outer surfaces have convex configurations.

10. The syringe of claims 1 further comprising an end cap selectively positionable over said needle.