Low-temperature preservation bag

Abstract

The invention relates to a low-temperature preservation bag which comprises a bag body and a pipeline, wherein a liquid outlet pipe and a liquid inlet pipe which are communicated with the inside and the outside of the bag body are arranged at the mouth of the bag body, the liquid inlet pipe is communicated with the pipeline at the outside, the bag body is formed from an upper film and a lower film through edge sealing, the upper film and the lower film are outwards protruded at the part close to an edge sealing line, a certain gap is formed in the bag, and the edge sealing line is positioned at the middle position of the bonded part of the upper film and the lower film. The low-temperature preservation bag of the invention has the advantage of breakage resistance, and meanwhile, the manufacturing method is simple, and the cost is low.

Description

technical field [0001] The invention relates to a medical device, in particular to a cryopreservation bag with a novel structure for living cell preservation, and a method for making the preservation bag. Background technique [0002] Deep low temperature (-196°C) preservation can greatly reduce the metabolism of cells and delay the loss of their functions. In view of the clinical use of special methods to cool biological tissues or organs to deep low temperature and store them for a long time, when needed, they can be stored again. It is rewarmed in a special way in order to obtain living organisms. Therefore, a suitable cryogenic storage container is the key. The container must have a certain degree of transparency for easy observation, non-toxic to the human body, good physical and chemical properties, and must have excellent low temperature resistance. Preserved under the best conditions to achieve no damage and no leakage. Existing soft PVC bags are brittle at -40°C, ...

AI Technical Summary

Problems solved by technology

[0003] Composite polyolefin, ethylene-vinyl acetate copolymer (EVA), etc. are made of cryogenic storage bags. Most of the bags use single-sided hot plate and high-frequency welding technology. The edge sealing line and the lower film are in a horizontal position. The contact edge between the side line and the lower film is thin, which is prone to stress concentration, and often breaks during freezing or thawing, and the breakage rate is relatively high

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