Sample analyser and method and device for detecting liquor drainage of sampling needle

Abstract

The invention discloses a sample analyser and a method and device for detecting liquor drainage of a sampling needle. The method comprises the following steps: firstly, controlling the sampling needle to move downwards to a first distance below the liquid level of reaction liquid in a reaction vessel when the sampling needle discharges liquid; confirming a liquid level signal, and then controlling the sampling needle to move upwards for a second distance from the first distance below the liquid level; controlling the sampling needle to discharge liquid to the reaction vessel in the process of controlling the sampling needle to move upwards for the second distance, or controlling the sampling needle to discharge liquid to the reaction vessel after controlling the sampling needle to move upwards for the second distance and stopping moving. The sampling needle is controlled to move upwards after the first liquor drainage is confirmed to be correct, and discharges liquor in the process of moving upwards or after moving upwards to a preset position and stopping moving. Thus, the sampling needle can be prevented from being excessively immersed into the reaction liquid after liquid is discharged, and the area of the polluted outer wall of the sampling needle is reduced.

Description

technical field [0001] The application relates to a sample analyzer, in particular to a method and a device for the sample analyzer to detect whether the liquid discharged from a sampling needle is correct. Background technique [0002] Biochemical analyzers add chemical reagents (hereinafter referred to as reagents) and patient blood samples (hereinafter referred to as samples) into reaction vessels through sampling needles. According to different test items, the same reaction vessel can be added 2~4 times. Then the reagents and samples are fully mixed to carry out chemical reactions; and then the light is used to detect the transmittance to achieve the purpose of detection, so as to determine the concentration of each component of the sample and assist clinical diagnosis. In the above-mentioned whole process, the correct addition of reagent samples is the key element to ensure the correct test results. [0003] The correct addition of reagent samples is mainly guaranteed ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it can only judge whether the sample addition is correct. For the second or more sample placement, it is impossible to locate the specific cause of the fault in some special cases. For example, there is no liquid level signal feedback for the Nth sample addition. However, when adding the N-1 sample due to the timing requirements of the instrument itself, it is impossible to determine whether the sample is added correctly. It is impossible to locate which nesting problem caused the fault, which increases the difficulty for users to troubleshoot

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