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1. (WO2017184399) OPTICAL FLOW CELL AND TEST HEAD APPARATUS

Pub. No.:    WO/2017/184399    International Application No.:    PCT/US2017/027151
Publication Date: Fri Oct 27 01:59:59 CEST 2017 International Filing Date: Thu Apr 13 01:59:59 CEST 2017
IPC: G01N 21/03
B01L 3/00
G01N 21/05
G01N 21/11
Applicants: INSTRUMENTATION LABORATORY COMPANY
Inventors: BOSY, Brian, J.
KERIMO, Josef
Title: OPTICAL FLOW CELL AND TEST HEAD APPARATUS
Abstract:
A sample cell apparatus (100) for use in spectroscopic determination of an analyte in a body fluid sample includes a first plate member (10) made from an optically clear material and a second plate member (20) made from an optically clear material and opposing the first plate member (10). A channel (12, 22) extending into a surface of the first plate member (10) and an opposing surface of the second plate member (20) houses a floating seal (30). The floating seal (30) surrounds a fluid chamber (50) that retains a sample of body fluid for optical measurement. The fluid chamber (50) may be opened for flushing by separating the first plate member (10) from the second plate member (20). During measurements the fluid chamber (50) is closed to define a repeatable optical path-length therethrough by urging the first plate member (10) against the second plate member (20) without compressing the floating seal (30) between the first plate member (10) and the second plate member (20).