Novel low-cross-pollution full-automatic biochemical analyzer

Abstract

The invention provides a novel low-cross-pollution full-automatic biochemical analyzer which includes a reaction disk unit. The reaction disk unit includes a reaction disk, on which a group of detection cups are placed. A non-contacted non-uniform air pressure stirring unit is arranged on the reaction disk and includes an air pressure stirring needle tip and a power supply system, the air pressure stirring needle tip connected to the power supply system through a pipeline. The air pressure stirring unit includes, successively, an air inlet, an air filter, an air pump, an air storage tank, an air flow pressure regulating switch, an air supply pipe and finally the air pressure stirring needle tip. An air heating machine temperature control device is arranged on the lower end of the air storage tank. The analyzer also includes a non-cross-type reagent unit, which comprises a reagent needle moving apparatus, a reagent disk, and a reagent needle bracket. The reagent disk includes a group of reagent bottles. A plurality of reagent needle positions are arranged on the reagent needle bracket. The number of the reagent needle positions on the reagent needle bracket is equal to the number of the reagent bottles, wherein each reagent needle is used for sucking only one corresponding reagent.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a novel fully automatic biochemical analyzer with low cross-contamination. Background technique [0002] Biochemical analyzers are commonly used testing equipment in medical institutions. One of the very common main problems in the use of existing full-automatic biochemical analyzers is that the existing full-automatic biochemical analyzers often need to use a variety of different reagents and detect different (concentration) samples in the detection work, and the instrument A common reagent needle is used to absorb different reagents and add them to each test cup for measurement. When drawing reagents, the inside and outside of the reagent needle, especially the reagent residue inside the needle often needs to use a lot of water, and even needs to be cleaned with a cleaning agent. Otherwise, residual The reagent will pollute the next inhaled reagent, which will affect the corre...

AI Technical Summary

Problems solved by technology

One of the very common main problems in the use of existing full-automatic biochemical analyzers is that the existing full-automatic biochemical analyzers often need to use a variety of different reagents and detect different (concentration) samples in the detection work, and the instrument A common reagent needle is used to absorb different reagents and add them to each test cup for measurement. When drawing reagents, the inside and outside of the reagent needle, especially the reagent residue inside the needle often needs to use a lot of water, and even needs to be cleaned with a cleaning agent. Otherwise, residual The reagent will pollute the next inhaled reagent, which will affect the correctness of the test result

And some reagents may not be able to completely clean the inner and outer walls of the needle even though they use a large amount of water or even use cleaning agents at the same time.

In addition, there is also a design that uses a disposable tip to absorb samples or reagents. However, since a used tip needs to be discarded each time, a large space is needed to store the disposable tip to ensure that the instrument does not require operators to be on duty for a long time, and The instrument designed in this way produces more consumables during operation

In addition, the biochemical analyzer also needs to stir and mix the reactants (reagent and sample mixture) in the detection cup during detection to obtain good detection results. However, the stirring devices of the existing fully automatic biochemical analyzers mainly use shared The method of stirring needles that need to contact the reaction liquid, and because the stirring needles need to be stirred by contacting the reaction liquids of different reagents and samples, there must be cross-contamination

In addition, there is also non-contact stirring using ultrasonic waves, but the cost of the instrument is increased due to the complexity of the ultrasonic device, and the ultrasonic waves also cause cumulative damage to the instrument components such as the test cup and interfere with the detection signal of the instrument while stirring the liquid in the test cup. risk, so this technique is rarely used

In order to eliminate cross-contamination of reagent needles and stirring needles, the existing automatic biochemical analyzers generally use cleaning agents and a large amount of water to clean the reagent needles and stirring needles, so the instrument consumes a lot of water, but unfortunately, despite the Washing with a large amount of water sometimes cannot completely eliminate cross-contamination, and detection errors caused by cross-contamination occur from time to time

Cross-contamination of automatic biochemical analyzers is the main obstacle and bottleneck for instrument performance improvement

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