Automatic analyzer

摘要

An automatic analyzer adapted to enhance sample/reagent dispensing accuracy, regardless of a difference in sample/reagent dispensing height of a dispensing probe. When the amount of sample in a sample container is small, tip height “h1” of a sample dispensing probe positioned immediately after it has aspirated the sample decreases below tip height “h′” of the sample dispensing probe positioned immediately before it discharges the sample. The sample in this state takes a concave shape at the tip of the sample dispensing probe positioned immediately before it discharges the sample. When the amount of sample in a sample container is large, tip height “h2” of the sample dispensing probe positioned immediately after it has aspirated the sample increases above the tip height “h′” and the sample takes a convex shape at the tip of the sample dispensing probe positioned immediately before it discharges the sample.

主权项

1. An automatic analyzer comprising:
a sample dispensing probe that dispenses a sample into a reaction cell from a sample container holding the sample; a sample dispensing syringe connected to the sample dispensing probe through a flexible tube; a sample dispensing motor that drives the sample probe in a vertical direction; a reagent dispensing probe that dispenses a reagent into the reaction cell from a reagent container holding the reagent; a reagent dispensing syringe connected to the reagent dispensing probe through a flexible tube; a reagent dispensing motor that drives the reagent dispensing probe in the vertical direction; and an analyzing unit that analyzes a solution from the reaction of the sample with the reagent, wherein the automatic analyzer further comprises a controller connected to each of the sample dispensing motor, reagent dispensing motor, sample dispensing syringe, and reagent dispensing syringe, wherein the controller is programmed to: based on signals from the sample dispensing motor or reagent dispensing motor, detect a first position where the sample dispensing probe or the reagent dispensing probe stops in the vertical direction from a predetermined reference point when the sample dispensing probe or the reagent dispensing probe aspirates a predetermined volume of the sample or reagent from the sample container or the reagent container, based on signals from the sample dispensing motor or reagent dispensing motor, detect a second position where the sample dispensing probe or the reagent dispensing probe stops in the vertical direction from the predetermined reference point when the sample dispensing probe or the reagent dispensing probe discharges the sample or regent into the reaction cell, determine a corrected discharge quantity value of the sample or the reagent based on a difference between the detected first position and the detected second position, and control the operation of the sample dispensing syringe or the reagent dispensing syringe to discharge the sample or the reagent based on the corrected discharge quantity value.