Abstract: Disclosed is a computer implemented method for automating the selection of an analytical statistical quality control (QC) procedure. Inputs of a quality requirement and observed performance characteristics of a method of measurement are initially provided, together with a database of theoretical operating characteristics of statistical QC procedures. An appropriate quality-planning algorithm (either analytical or clinical) which relates the quality requirement, the observed performance characteristics of the method of measurement, and the theoretical operating characteristics of statistical QC procedures is also provided. Using predetermined QC selection criteria and selection logic, a computer is programmed to automatically choosing, based on the quality requirement, observed method performance, and operating characteristic of candidate QC procedures, a subset of control rules and numbers of control measurements which satisfy selection criteria and selection logic.

Abstract: An improved analytical cuvette assembly includes structure defining a first chamber region that has a loading port through which a first reaction component is introduced for storage, structure defining a second chamber region having a loading port through which a second reaction component is introduced for storage, and barrier structure between the first and second chamber regions that has a crest portion that defines the lower edge of a transfer passage between the two chamber regions. The second chamber region includes an analysis region where the reaction product resulting from mixture of the two reaction components is subjected to analysis.

Abstract: A multicuvette rotor assembly for use in a clinical chemistry analyzer of the centrifugal type includes a body member that defines a circumferential array of spaced radially extending recesses, with a divider member in each recess to define a first chamber and a second chamber radial outward from said first chamber; and a ring member that has a mating reference surface seated on an annular reference surface of the body member, with the inner peripheral surface of the ring member located outwardly of the middle of the second chambers.

Abstract: A blood analysis system comprises a tempering chamber in which a plurality of flow through measuring cells are disposed. A sensor electrode is associated with each cell. A sample flow path extends from an entrance port through a heater element, a first measuring cell, a control valve, a second measuring cell, a reference electrode interface, to a positive displacement pump. In standby condition, the entrance port is immersed in flush fluid and operation of the pump in such condition flows flush fluid through the entire sample path. Fluid access to either measuring cell is obtainable through the entrance port, auxiliary valve ports, or disconnectable conduits connected to the valve.

Abstract: A flush system for electrochemical analysis apparatus comprising a reservoir of flush solution, a flush chamber connected thereto and open at the top, and a sample entrance (probe) arranged for movement between an immersed position in the flush chamber and a sampling position removed from the flush chamber.