Quantitative sample injector for blood separation

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a quantitative sample injector for blood separation which comprises a sample suction tube of which atop part is provided with an accommodating space, a filter membrane which is used for dividing the accommodating space into a stock solution area and a filtrate area, a U-shaped pipe of which the bent pipe part is arranged downwards, wherein one end of the U-shaped pipe is communicated to the filtrate area, and the other end of the U-shaped pipe is connected with a sample adding pipe; a liquid storage bag which is arranged between the two straight pipe sections of the U-shaped pipe, wherein an inlet is formed in one side, close to the sample suction pipe, of the liquid storage bag; a pluggingpiece which is used for plugging the open end of the sample suction pipe or the sample adding pipe, wherein a negative pressure unit is arranged on the liquid storage bag and used for generating negative pressure to enable a whole blood sample to enter the U-shaped pipe after being filtered by a filter membrane at the top of the sample suction tube, and the whole blood sample is discharged from the sample adding tube after the negative pressure unit applies pressure. The quantitative sample injector for blood separation not only can filter red blood cells, but also can quantitatively inject samples.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a quantitative sampler for blood separation. Background technique [0002] In vitro diagnosis, namely IVD (In Vitro Diagnosis), refers to products and services that obtain clinical diagnostic information by testing human samples (blood, body fluids, tissues, etc.) outside the human body, and then determine diseases or body functions. The detection kit is one of the most commonly used devices in in vitro diagnosis. The in vitro detection kit is mainly used for diagnosis by detecting antigens or antibodies in blood or body fluids. It has high sensitivity, strong specificity, and good repeatability. , because its reagents are stable, easy to store, easy to operate, and the results are judged more objectively, it has been widely used in various fields of immunological testing. [0003] When using the kit to detect blood, the red blood cells in the whole blood may cause unpre...

AI Technical Summary

Problems solved by technology

[0003] When using a kit to detect blood, the red blood cells in the whole blood may have unpredictable interference to the test results, such as reducing the reaction value and false negatives, which will affect the detection accuracy of the kit

When the existing detection kits detect blood, the whole blood sample is generally directly dropped on the sample pad, and the red blood cells are filtered through the sample pad. Because of the limitation of the structure of the quality control card, the red blood cells cannot be completely filtered, and the interference of the cells As a result, the detection precision is greatly affected, and the results are often quite different from the serum plasma detection; or the blood is left to stand and centrifuged to obtain the serum supernatant after sufficient coagulation. This method is cumbersome and consumes a lot of manpower and material resources.

[0004] In addition, the quantitative analysis is also carried out through the color depth of the color line in the kit, but it is difficult for medical personnel to control the amount of whole blood added when using the kit, which also brings inconvenience to the quantitative detection of diseases

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