Liquid pipetting device and liquid pipetting method

Abstract

The invention discloses a fluid transfer device and a fluid transfer method. The fluid transfer device comprises a fluid transfer mechanism for drawing and feeding a body fluid sample as well as a positioning mechanism for controlling horizontal, longitudinal and vertical motion of the fluid transfer mechanism; the fluid transfer mechanism comprises a pipette which comprises a liquid path system, an air path system and fluid transfer control systems. According to the fluid transfer device, when a plunger pump stops drawing the sample, compressed air expands outwards, an air bag of the air path system can cushion the action force of outward expansion of the compressed air in the air path system, the drawn body fluid sample is inhibited from spilling from a disposable sample drawing head, and a feeding flow can be shortened and simplified by the fluid transfer device, so that the body fluid sample feeding time can be shortened while the body fluid sample feeding accuracy and precision are improved.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a liquid pipetting device and a liquid pipetting method. Background technique [0002] The chemiluminescent immunoassay system is an instrument for immunological quantitative analysis of patient body fluid samples. During the analysis, quantitative samples and reagents are mixed to cause a chemical reaction in a certain environment to determine the measured substances in the body fluid samples. concentration. [0003] At present, more analyzers use pipelines made of stainless steel to directly absorb and fill body fluid samples, and reuse the contact parts of the stainless steel pipelines after cleaning, but repeated use may cause contamination between samples and interfere with the measurement results possible accuracy. In order to avoid contamination between samples, it can be realized by installing a disposable suction head at the front end of the stainless steel pipeline. H...

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a liquid pipetting device and a liquid pipetting method, so as to overcome the problem that the sample sucked is easy to change from the disposable suction head to the body fluid sample in the prior art. The overflow of the opening of the sample head forms liquid droplets, which affects the accuracy and accuracy of sample filling

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