Paul D Christenson

US Patent:

52792943, Jan 18, 1994

Filed:

Mar 26, 1990

Appl. No.:

7/499085

Inventors:

Paul J. Anderson - Bloomington MN
Ross A. Jessen - Chaska MN
David R. Linde - Maple Grove MN
Richard E. Jones - Bloomington MN
Bert Walter - Mendota Heights MN
Paul E. Christenson - Apple Valley MN

Assignee:

Cascade Medical, Inc. - Eden Prairie MN

International Classification:

A61B 514

US Classification:

128633

Abstract:

Hand-held shirt-pocket portable instrument for quantitative measurement of glucose or analysis in biological fluids. The system accepts a disposable diagnostic reagent test device which has a reagent carrier and mode of identifying to the instrument the reagent lot characteristics. The instrument includes a housing structure having a visual LCD readout, a microprocessor, and photosensing circuitry which measures the change of color of the reagent carrier upon reaction in the reacting chemistry of the disposable test device. The housing also includes a spring arrangement for actuating a disposable lancet into the skin for generating blood. The disposable diagnostic reagent unit includes a configuration for transporting of the blood in the regent unit. The system includes verification and calibration sequences for the electronics, the chemistry of an unused disposable unit, the presence of a blood sample, and the ambient temperature. The system also provides for storing a plurality of analysis readings.