Sleeve needle suitable for magnetic bead washing system

Abstract

The invention discloses a sleeve needle suitable for a magnetic bead washing system. The sleeve needle comprises a connecting base. An outer washing needle extending outwards is installed in an installing groove of the connecting base in an inserted manner. An inner liquid suction needle is connected into the outer washing needle through a fixing assembly. The outer end of the inner liquid suctionneedle extends out of the outer end of the outer washing needle to form an inserting section. The inner end of the inner liquid suction needle penetrates out of the inner end of the outer washing needle and is fixedly connected to the bottom wall of the installing groove. The connecting base or the outer washing needle is provided with an outer pipeline connector communicating with the outer washing needle. The connecting base or the outer washing needle is provided with an inner pipeline connector communicating with the inner liquid suction needle. The sleeve needle has the advantages that the structure is simple, the sleeve needle has a self-cleaning function, it can be ensured that the inner wall and the outer wall of the inner liquid suction needle are washed cleanly, the washing effect is good, and the situation that cross contamination among different samples occurs, and accuracy and reliability of sample detecting results are influenced can be prevented.

Description

technical field [0001] The invention relates to a magnetic bead cleaning system for in vitro diagnostic equipment, in particular to a sleeve needle suitable for the magnetic bead cleaning system. Background technique [0002] Existing in vitro diagnostic equipment (such as chemiluminescence immunoassay analyzer, biochemical analyzer and nucleic acid analyzer, etc.) mostly use chemical or bioluminescence system as an indicator system for antigen-antibody reaction, so as to quantitatively detect antigen or antibody. When separating and purifying samples, magnetic beads are usually used to adsorb specific antibodies or receptors (i.e., targets) in the sample. After the reaction is completed, use the aspirating needle of the magnetic bead cleaning system to suck out the sample impurities that have not participated in the reaction in the sample, and then pass The injection needle of the magnetic bead cleaning system injects cleaning solution into the cuvette to clean the sample i...

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of the sample waste after the target antibody is adsorbed to the magnetic beads, it is particularly easy to adhere to the outer wall of the aspiration needle during the aspiration process, and it is difficult to clean the outer wall of the aspiration needle, which in turn leads to cross-contamination between different samples. Affect the accuracy of test results, poor repeatability

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