Autoanalyzer

Abstract

Dispensing failure occurs when air-sucking or clogging is caused at the time of sucking sample or reagent by using a dispensing probe. An automatic analyzer is equipped with a dispensing mechanism (15) for dispensing the sample into a reaction container (35) from a reagent container (10) and an analysis means (61) for analyzing contents within the reaction container (35), wherein the dispensing mechanism (15) includes a pressure generation mechanism (69) for changing the pressure within a nozzle and a dispensing flow path (24) for coupling between the nozzle and the pressure generation mechanism (69) and containing pressure transmission medium therein; and further includes an oscillator (27) for applying vibration of a particular frequency to the pressure transmission medium within the flow path, a pressure sensor (26) for detecting the pressure within the flow path, and a mechanism (76) for detecting whether or not the sample is sucked normally into the nozzle based on the amplitude or the phase difference of the component of the particular frequency extracted from the output of the pressure sensor (26).

Description

technical field [0001] The present invention relates to an automatic analyzer for automatically analyzing components such as blood. Background technique [0002] An automatic analysis device that dispenses samples composed of biological samples such as blood and urine from the sample container to the reaction container on the reaction line, and then dispenses the reagent from the reagent container to the reaction container on the reaction line. A measuring unit such as a meter measures a mixture of a sample and a reagent for qualitative or quantitative analysis. [0003] When dispensing the sample and the reagent together, the tip of the dispensing catheter is immersed in the liquid to be dispensed. The greater the immersion depth, the greater the amount of liquid adhered to the outer wall of the catheter, and the greater the contamination. Therefore, in order to reduce the immersion depth of the dispensing catheter as much as possible, the generally adopted method is to pe...

AI Technical Summary

Problems solved by technology

[0004] When a sample is aspirated using such a sample catheter, a film or bubbles may be formed on the upper part of the liquid surface of the test object or the reagent due to the operator's unsatisfactory dispensing operation, etc.

In this case, when the tip of the dispensing catheter comes into contact with the film or bubble on the liquid surface, the electrostatic capacitance changes greatly, so it is possible to detect the film or bubble as the liquid surface, and in the original set as the liquid surface Cannot reach liquid surface at immersion height with slightly downward facing conduit

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