Membrane oxygenator

Abstract

The invention relates to a membrane oxygenator. The membrane oxygenator comprises a cavity, a blood inlet and a blood outlet, wherein the blood inlet and the blood outlet are formed in two ends of thecavity; the cavity comprises a diffusion section, an oxygenation section, a gathering section and an observation section which sequentially communicate; the front end of the diffusion section is connected with the blood inlet; an oxygen inlet is formed in the upper part of the oxygenation section, a gas outlet is formed in the lower part of the oxygenation section, the oxygenation section is divided into a plurality of flow guide channels by a plurality of flow guide partition pieces in the cavity, and hollow oxygenation wires arranged in an array mode are arranged in the flow guide channels;and a flexible single-end free piece is connected to the tail part of each flow guide partition piece, and is located in the observation section, and the tail end of the observation section is connected with the blood outlet. In the process that blood passes through the oxygenator cavity in the radial direction, due to the fact that the first-order derivative of a flowing space sectional area iscontinuous and the second-order derivative of the flowing space sectional area is zero, a blood flow field is evenly distributed, and vortexes and dead zones are not generated.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a membrane oxygenator. Background technique [0002] There is a contradiction in the design of the membrane lung parts of the extracorporeal circulation machine (ECMO): if the blood pump pressure and blood flow velocity are increased, the blood shear force will increase, leading to an increase in the probability of hemolysis and thrombosis; if the blood pump pressure is reduced, To reduce the blood flow rate, it is necessary to expand the diameter of the blood transfusion tube and increase the capacity of the membrane oxygenator, so that more blood needs to be perfused into the tube. Since ECMO perfusion needs to consume one-sixth of the blood volume of the human body, if the perfusion blood volume is further increased, other complications will be caused, which is also an unacceptable problem in clinical use. The existing technology is often a cartridge oxygenator. Becau...

AI Technical Summary

Problems solved by technology

[0002] There is a contradiction in the design of the membrane lung parts of the extracorporeal circulation machine (ECMO): if the blood pump pressure and blood flow velocity are increased, the blood shear force will increase, leading to an increase in the probability of hemolysis and thrombosis; if the blood pump pressure is reduced, To reduce the blood flow rate, it is necessary to expand the diameter of the blood transfusion line and increase the capacity of the membrane oxygenator, so that more blood needs to be perfused into the line

Since ECMO perfusion needs to consume one-sixth of the blood volume of the human body, if the perfusion blood volume is further increased, other complications will be caused, which is also an unacceptable problem in clinical use

The existing technology is often a cartridge oxygenator. Because the flow field of blood in the membrane lung device is not easy to control, there are local turbulence and other phenomena, resulting in uneven blood shear force, causing problems such as thrombus and hemolysis, and affecting membrane lung parts. The service life of the membrane lung parts is increased, and the use cost of the user is increased; and the occurrence of thrombus can only be controlled by drugs to prolong the service life of the membrane lung parts

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