Hemoperfusion cartridge

Abstract

The invention discloses a hemoperfusion cartridge, which comprises a middle cylinder (1), glands (2), small blood nozzle cap (3) and filter screens. The two ends of the middle cylinder (1) are respectively sealed by one gland (2). A blood nozzle (2a) is arranged in the center of each gland (2) and is sealed by one small blood nozzle cap (3) in a pressing way. One filter screen is respectively installed in the middle cylinder (1) at a position close to the respective gland (2). An annular groove is arranged on the end surface of the opening end of each gland (2). The inner wall of the outer circumference of the annular groove is step-shaped. The end structure of the middle cylinder (1) is adaptive to the annular groove structure. The end (1d) of the middle cylinder is inserted into the annular groove for butt-connection, and the end (1d) of the middle cylinder and the annular groove are ultrasonically welded into a whole body. The invention has the advantages that the structure is simple, the design is unique, the glands and the middle cylinder structure are adaptive to ultrasonic welding, the sealing effect of the welded and formed hemoperfusion cartridge is good and the pollution is not apt to be caused; the small blood nozzle cap and the blood nozzle of the gland have unique three-dimensional sealing effect and the sealing is tight; and the number of components is reduced, the dies are reduced and the production cost and the manufacturing cost are greatly decreased.

Description

technical field [0001] The invention relates to a medical device, in particular to a hemoperfusion device in the field of blood purification. Background technique [0002] In recent years, blood purification therapy has been rapidly developed and popularized in our country. Among them, hemoperfusion is one of the important ways of blood purification. At present, hemoperfusion technology is widely used clinically, not only has a good curative effect on severe poisoning and drug poisoning, but also can be used in the treatment of many chronic intractable and difficult diseases. Therefore, the demand for disposable hemoperfusion devices is increasing year by year. [0003] During the blood purification process, the hemoperfusion device is connected in series in the circulating blood circuit leading out of the body. When the blood flows through the tank, the adsorbent absorbs the toxic substances in the blood, and the purified blood enters the internal circulation again. Ther...

AI Technical Summary

Problems solved by technology

The entire hemoperfusion device has 14 main components and requires 7 sets of molds, which is relatively complicated and the production cost is high

At the same time, several sealing points of the hemoperfusion device are threaded and tightened to seal. When the perfusion device is sterilized, due to high temperature and high pressure, there will be a certain deformation, and the thread fit will become loose, which needs to be tightened again, causing pollution.

In order to overcome the above disadvantages, some people try to perform rotary friction welding on the parts that need to be sealed. However, during the welding process, many flying debris will be generated at the moment of contact friction. The flying debris is on the filter screen. Once it enters the blood, it will be very harmful to the human body.

Some people also try to carry out eddy current welding on the parts that need to be sealed. The welding is done by heating the metal induction coil for plastic fusion welding. Since the position of the induction coil and the weldment is difficult to ensure concentricity, the circumferential temperature is difficult to be consistent, and the welding effect is difficult to guarantee. There are more waste products after molding

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