a frozen rod

Abstract

The invention relates to a refrigeration loading rod, and belongs to the technical field of medical instruments. The refrigeration loading rod comprises a loading rod part and a loading rod outer cannula. The loading rod part disclosed by the invention is integrally formed, so as to prevent a slide glass from dropping out; the radian of the designed arc-shaped slide glass can fit for the radian of the surface of a drop under the natural gravity, so that the three-dimensional shape of the refrigerating drop is kept, and refrigerating fluid around a sample in the refrigerating drop can be uniformly distributed, so as to ensure that the refrigerating fluid is uniformly refrigerated; after the slide glass loaded with embryos is loaded in a cylindrical hollow tube, the refrigeration loading rod can quickly sink in liquid nitrogen under the action of a steel ring, so that the refrigeration loading rod can be in full contact with the liquid nitrogen; since the part of the slide glass, which is loaded with the embryos, is completely located in the cylindrical hollow tube, and a cotton plug for fixing a powder plug is formed by weaving synthetic fibers in specific proportion, the air permeability of the embryos is ensured, the moisture absorption and the resistance to acid and base are stronger, a good storage environment is provided for the embryos, and the cross infection of the embryos in a liquid nitrogen pot is effectively avoided.

Description

Technical field [0001] The invention belongs to the technical field of medical devices, and specifically relates to a freezing carrier rod. Background technique [0002] With the increase of infertility population, more and more people are receiving embryo transfer. In open vitrification, embryos are in direct contact with liquid nitrogen, which makes the toxic substances in liquid nitrogen potentially dangerous to embryos, so many In vitro fertilization-embryo transfer (IVF) laboratories use enclosed vitrification as the main method for storing embryos, eggs, blastocysts, etc. [0003] However, the embryo-carrying carrier is relatively simple and rough at present. For example, the embryo-carrying carrier is directly glued to the glass rod with glue, or the glass rod is melted and pulled into a thin sheet, and the embryo is placed on it; or the embryo is carried by a plastic tube. Embryos, the latest product is to put embryos on a plastic sheet and then cover with a cap, or direct...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned method of carrying embryos has the following defects: first, the slides are directly glued to the glass rod with glue, and the slides are easy to fall during storage; second, the original carrier is the latest plastic carrier. The surface tension is not uniform, and the embryo will appear spherical or flattened during use, which is not conducive to observation and is not conducive to absorbing the freezing liquid around the embryo. If it is directly frozen in this way, the thawing time will be increased during thawing, which will affect the embryo. quality; thirdly, there is no fixed place to place the embryo on the longer carrier, but placed on a certain position on the slide according to the doctor's habit. When observing, it is necessary to find the position of the embryo. The sheath will have the risk of knocking down the embryos; fourth, several people's embryos will be placed in a large liquid nitrogen bucket, and the liquid nitrogen is not used for one-time use, and there will be a risk of virus cross-infection

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