Apparatus and method for analytical determinations
First Claim
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1. A sample analysis cartridge comprising:
- (a) a liquid sample inlet; and
, (b) a conductance measurement arrangement including;
(i) a first, unfiltered, conductance measurement cell in fluid flow communication with the liquid sample inlet; and
(ii) a second, filtered, conductance measurement cell in fluid flow communication with the liquid sample inlet.
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Abstract
An apparatus and method for measuring conductance are provided. The method and apparatus are particularly well adapted for use with a removable or replaceable cartridge in a blood analysis system. The apparatus generally involves providing a system having a first, unfiltered, conductance measurement cell and a second, filtered, conductance measurement cell. The preferred method involves relating values measured in the two cells for a whole blood sample and for a known calibrant together, to obtain a value, for example hematocrit, for the unknown whole blood sample.
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Citations
20 Claims
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1. A sample analysis cartridge comprising:
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(a) a liquid sample inlet; and
,(b) a conductance measurement arrangement including;
(i) a first, unfiltered, conductance measurement cell in fluid flow communication with the liquid sample inlet; and
(ii) a second, filtered, conductance measurement cell in fluid flow communication with the liquid sample inlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of evaluating hematocrit;
- said method including steps of;
(a) measuring conductance of an unknown whole blood sample in a hematocrit measurement system including;
(i) a first, unfiltered, conductance measurement cell to provide a measurement value CB; and
,(ii) a second, red blood filtered, conductance measurement cell to obtain a measurement value CP; and
,(b) correlating the conductance measurements CB and CP to determine a hematocrit value for the unknown whole blood sample. - View Dependent Claims (17, 18, 19, 20)
- said method including steps of;
Specification