Test strip with flared sample receiving chamber

US8222044B2 · kind B2 · utility

Assignees

• Roche Diagnostics Operations, Inc. · US
• Roche Operations Ltd. · BM

Inventors

• Raghbir S. Bhullar · Indianapolis, US
• Nigel A. Surridge · Carmel, US
• Tom Funke · Carmel, US
• Paul Douglas Walling · Indianapolis, US
• Randall K. Riggles · Indianapolis, US

Key dates

• Filing date: Nov 16, 2011
• Grant date: Jul 17, 2012
• Expiry date: Nov 16, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1052
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A test strip with a sample receiving chamber having a novel flared portion that terminates in a sample receiving opening. The flared portion provides a reservoir from which sample fluid can be drawn into the capillary or sample receiving chamber. The wider opening provided by the present invention is easier to “target” with a sample fluid. In preferred embodiments, the hydrophilic reagent layer extends to the dosing end or side of the test strip and further promotes wicking of the sample into the sample receiving chamber and thus reduces dose hesitation. In other preferred embodiments, a tapered dosing end is provided on the test strip in combination with the flared portion, and this combination create a test strip that will draw sample fluid into the sample receiving chamber regardless of where along the dosing edge of the test strip the fluid sample makes contact.