A membrane oxygenator

Abstract

A membrane oxygenator, comprising: a cavity and blood inlets and blood outlets arranged at both ends of the cavity, the cavity comprises: a diffusion section, an oxygenation section, a summary section and an observation section connected in sequence; the front end of the diffusion section Connect the blood inlet; an oxygen inlet is provided above the oxygenation section, and a gas outlet is provided below the oxygenation section. Hollow oxygenation filaments arranged in an array; a flexible single-ended free piece is connected to the tail of the diversion spacer, and the flexible single-ended free piece is located in the observation section, and the end of the observation section is connected to the blood outlet. When the blood radially passes through the chamber of the oxygenator, because the first-order derivative of the cross-sectional area of ​​the flow space is continuous and its second-order derivative is zero, the blood flow field is evenly distributed without eddy currents and dead zones.

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 is increased and the blood flow velocity is increased, the blood shear force will increase, resulting in an increased probability of hemolysis and thrombosis; if the blood pump pressure is reduced, Decreasing the blood flow rate requires expanding the diameter of the infusion line and increasing the capacity of the membrane oxygenator, which requires more blood 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 unbearable problem in clinical use. The prior art is often a cartridge type oxygenator. Because the f...

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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