Textile type artificial blood vessel water permeability test equipment and its testing method

Abstract

The present invention provides a water permeability testing device of textile type artificial blood vessel and its testing method. Said testing device includes water tank, water supplying pipe, return pipe, metal hose, organic glass tube, test valve, sample holder with hole and permeated water receiver. It also includes a T-shaped connector and pressure meter.

Description

Technical field: [0001] The invention belongs to the field of textile testing instruments, and relates to a textile-type artificial blood vessel water permeability testing device and a testing method thereof. Background technique: [0002] The permeability of artificial blood vessels refers to the ability of the tube wall to pass through a certain liquid. Generally, it is characterized by water permeability, which is divided into two indicators. The water flow per unit area of ​​the sample (when measured by the volume of permeated water, the unit is ml / cm 2 / min, when the permeation water weight is used to measure, the unit is g / cm 2 / min), the other is the overall water permeability, which refers to the water flow through the entire artificial blood vessel wall or its representative pipe section per unit time under the static pressure of 120mmHg, the unit is the same as above. Permeability reflects the anti-permeability of the blood vessel wall after the artificial blood ...

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Problems solved by technology

[0004] This test fabric water permeability device is because the fabric sample effective area of ​​its test is 100cm on the one hand 2 , not suitable for the test of artificial blood vessels with a diameter ranging from 6mm to 34mm; on the other hand, its test pressure cannot reach the artificial blood vessel test standard of 120mmHg; in addition, we believe that this bottom-up outflow method has a more complicated structure, The water flow is not smooth, so it is not suitable for the water permeability test of the current textile artificial blood vessels

[0005] At the same time, a small amount of testing instruments related to the water permeability of fabrics have been retrieved through foreign patent documents. As USP4880499, a kind of instrument for testing the water permeability of porous sheet materials has been introduced. Instruments for water permeability under certain water pressure, but these two instruments failed to take into account the basic requirements of the effective area of ​​the fabric sample holding device and the standard 120mmHg pressure, so no one suitable for water penetration of textile artificial blood vessels was found. Therefore, we designed and manufactured a water permeability test device for textile artificial blood vessels and provided corresponding test methods according to the requirements of the permeability test indicators in the international standard for artificial blood vessels.

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