Method and device for collecting sample by full-automatic blood cell analyzer

Abstract

The invention discloses a method and a device for collecting a sample by a full-automatic blood cell analyzer, belongs to a blood detection device, and particularly relates to a method and a device for collecting the sample by the full-automatic blood cell analyzer used in a blood routine test. The device comprises a sampling needle, and an inner hole of the sampling needle is connected with a diluent injection device through a pipeline. The method is characterized by comprising the steps that a sampling needle outer wall cleaning element is sleeved outside the sampling needle; a waste fluid outlet and a diluent inlet for cleaning in up and down arrangement are arranged at the lateral wall of a housing of the sampling needle outer wall cleaning element; the waste liquid outlet is connected with a waste liquid collecting device, and the diluent inlet for cleaning is connected with a diluent supply device. The sampling needle is full of diluent; the diluent and a whole blood sample are isolated by an air column; the outer wall of the sampling needle is cleaned by the sampling needle outer wall cleaning element; the front end of the whole blood sample is removed before the whole blood sample is injected; and the inner wall of the sampling needle is cleaned after the whole blood sample is injected, so that the metering accuracy for sample collection is ensured.

Description

technical field [0001] The invention belongs to blood detection equipment, in particular to a sample collection method and device for an automatic blood cell analyzer used in clinical blood routine testing items. Background technique [0002] The automatic hematology analyzer used in clinical blood routine projects requires a small amount of blood collection. The three- or five-differentiation hematology analyzer needs to use about 10-60 microliters of whole blood samples for measurement. Such a small amount of sample collection is prone to the following problems: ①The air in the sampling needle pipeline, when the syringe pump draws the sample, the total volume of the air will change due to the pressure difference, which will affect the inaccurate number of samples collected. ②Every time the sample is drawn and filled, The amount of residual sample on the inner wall or outer wall of the sampling needle is inconsistent, which will lead to the problem of inaccurate sample addi...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the inaccurate measurement caused by air in the sampling needle and residual samples on the inner and outer walls of the sampling needle in the sample collection of the existing three-differentiation or five-differentiation blood cell analyzer, although the measurement problem is solved when the diluent is used in the sampling needle, dilution will occur The interface between the liquid and the sample will penetrate into each other and cause the deficiency of changing the concentration of the whole blood sample. The purpose of the present invention is to provide a device suitable for sample collection of an automatic blood cell analyzer. Another purpose of the present invention is to provide a device using the device. A sample collection method suitable for automatic blood cell analyzer

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