Device for accurately and quantitatively extracting blood sample

Abstract

The invention provides a device for accurately and quantitatively extracting a blood sample. The device comprises a pipetting cavity, a residual liquid absorber, a liquid transfer power mechanism, a sample inlet and a sample outlet, a first non-return mechanism is arranged at the sample inlet; a second non-return mechanism is arranged at the sample outlet; wherein the sample inlet is connected with the front end of the pipetting cavity, the liquid transfer power mechanism is connected with the residual liquid absorber, the pipetting cavity comprises an accurate sampling cavity, the residual liquid absorber is connected with one end of the accurate sampling cavity, and the sample outlet is connected with the other end of the accurate sampling cavity through the second non-return mechanism.According to the invention, the sample inlet, the sample outlet, the residual liquid absorber and the liquid transfer power mechanism are matched with the work of the first non-return mechanism and the second non-return mechanism, and the accurate sampling cavity is utilized to realize accurate quantitative blood sampling.

Description

technical field [0001] The invention relates to a quantitative drawing device, in particular to a device for accurately quantitatively drawing blood samples. Background technique [0002] With the improvement of medical technology, diagnostic test strips that can analyze human health information with only a small amount of blood have begun to become popular. Especially for hospitalized patients, regular blood collection is required for health monitoring, but regular blood collection will cause multiple wounds on the patient's body, and catheters, indwelling needles, and injection needles implanted in the human body have solved the problem of excessive wounds, but existing The blood collection equipment has a large amount of blood, and it is impossible to directly and accurately draw blood samples quantitatively, and it cannot provide solutions for various tests that require accurate quantitative blood samples for detection (such as various diagnostic test strips that require...

AI Technical Summary

Problems solved by technology

Existing micro-sampling devices such as micro-samplers and pipettes all need to be operated in the laboratory, and it is impossible to directly extract a fixed amount of blood samples from intravascular catheters, indwelling needles, injection needles, etc. indwelling the human body, because Built-in intravascular catheters, indwelling needles, injection needles, etc. are directly inserted into human blood vessels, and the interfaces are Luer connectors

Existing micro-samplers, pipettes, etc. cannot be directly connected to intravascular catheters, indwelling needles, injection needles, etc. due to mismatched connection ports. Even if the connection is successful through certain technical means, due to intravascular pressure, blood Due to factors such as self-viscosity, it is also impossible to accurately pipette a fixed amount of blood samples

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