Test element analysis system

US7262061B2 · kind B2 · utility

Assignee

• Roche Diagnostics GMBH · DE

Inventors

• Wolfgang Petrich · Bad Schönborn, DE
• Wilfried Schmid · Mannheim, DE
• Gerrit Kocherscheidt · Heidelberg, DE
• Jean-Michel Asfour · Weinheim, DE

Key dates

• Filing date: Dec 8, 2000
• Grant date: Aug 28, 2007
• Expiry date: May 19, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/7703
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Test element analysis system for the analytical investigation of a sample, in particular of a body liquid of human beings or animals, comprising test elements (2) with a carrier film (5) and a test field (7) fixed to the flat side (6) of the carrier film (5), the test field (7) containing a reagent system the reaction of which with the sample (21) leads to an optically measurable change in the detection zone (24) which is characteristic for the analysis, and an evaluation instrument with a measuring device for measuring the optically measurable change. In order to obtain a very high measuring accuracy and an easy handling at the same time, the carrier film (5) of the test element (2) comprises a light guide layer (26), the detection zone (24) of the test field (7) is in optical contact to the light guide layer (26) in a coupling out zone (33), enabling the coupling out of light from the light guide layer (26) to the detection zone (24), the primary light (29) of the light emitter (16) is coupled into the entry surface (31) in the light guide layer (26) in such a manner that a light guide section (32) of the light path of the primary light (29) runs between the entry surface and the…