Medical magnesium alloy biodegradability in-vitro dynamic simulation test equipment

Abstract

The invention discloses medical magnesium alloy biodegradability in-vitro dynamic simulation test equipment, which comprises a power tank, a test bin, a lower sample loading device, an air metering device, a liquid suction pipe, a first return pipe, a second return pipe and the like, wherein the liquid suction pipe, the first return pipe and the second return pipe are arranged in a liquid tank respectively; the liquid tank is placed in a constant-temperature tank; a flowmeter is fixed vertically; the lower sample loading device is positioned in the test bin; the air metering device is vertically fixed over the lower sample loading device; the power tank and the test bin are horizontally fixed an adjustable-height base respectively; and the suction pipe and the inlet of a circulating pump as well as the outlet of the circulating pump and the inlet of the flowmeter, the outlet of the flowmeter and the inlet pipe of the power tank, the outlet pipe of the power tank and the inlet pipe of the test bin, the outlet pipe of the test bin and the first return pipe and the overflow pipe of the power tank and the second return pipe are connected by water pipes to form a liquid medium circulating path. The equipment can realize the controlled flowing of liquid in a circulating system and the real-time collection and synchronous accurate metering of an insoluble gas product.

Description

technical field [0001] The invention belongs to the field of material performance testing technology and equipment, and relates to a device for dynamic simulation test and evaluation of material corrosion degradation performance in a fluid medium, especially suitable for biomedical materials / apparatus such as medical magnesium alloy and its medical equipment biodegradation In vitro dynamic simulation testing of performance. Background technique [0002] For materials serving in a liquid environment, such as medical devices implanted in the human body, ships in seawater, etc., the relative motion between them and the medium has a very important impact on their corrosion degradation behavior. Studies have shown that this relative movement can not only change the corrosion degradation rate of the material / device, but also change its corrosion degradation type and its mechanism. Therefore, simulating the actual service conditions, especially the relative movement between the en...

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to implement, it has the following main disadvantages: 1) It ignores the important influence of the relative motion of the material / medium on the corrosion degradation behavior of the material except convection

The biomedical application of magnesium alloy is just around the corner, especially when it is used as a coronary stent, it will inevitably be sheared by flowing body fluids such as blood, tissue fluid, etc.; It is difficult to accurately predict the in vivo biodegradability of materials / devices, which greatly reduces its clinical reference value, thus losing the due significance of in vitro research

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