Hand-held test meter with phase-shift-based hematocrit measurement circuit

US8623660B2 · kind B2 · utility

Assignee

• LifeScan Scotland Limited · GB

Inventors

• Ulrich Kraft · Hofheim, DE
• David Elder · Inverness, GB
• Mahyar Z. Kermani · Pleasanton, US

Key dates

• Filing date: Sep 30, 2011
• Grant date: Jan 7, 2014
• Expiry date: Mar 14, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/144444
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A hand-held test meter for use with an analytical test strip in the determination of an analyte in a bodily fluid sample includes a housing; a microcontroller block disposed in the housing; and a phase-shift-based hematocrit measurement block. The phase-shift-based hematocrit measurement block includes a signal generation sub-block, a low pass filter sub-block, an analytical test strip sample cell interface sub-block, a transimpedance amplifier sub-block, and a phase detector sub-block. In addition, the phase-shift-based hematocrit measurement block and microcontroller block are configured to measure the phase shift of a bodily fluid sample in a sample cell of an analytical test strip inserted in the hand-held test meter and the microcontroller block is configured to compute the hematocrit of the bodily fluid sample based on the measured phase shift.