Weave type artificial blood vessel fatigue performance bionic test device and its test method

An artificial blood vessel, fatigue performance technology, applied in the measurement device, the use of repetitive force/pulsation force to test the strength of materials, specific gravity measurement, etc., can solve the problem of lack of complete simulation of the test method

Inactive Publication Date: 2008-01-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to provide a textile artificial blood vessel fatigue performance bionic testing device and its testing method, which is used to solve the technical problem that the existing textile-based artificial blood vessel fatigue perf

Method used

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  • Weave type artificial blood vessel fatigue performance bionic test device and its test method
  • Weave type artificial blood vessel fatigue performance bionic test device and its test method
  • Weave type artificial blood vessel fatigue performance bionic test device and its test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The specific operation steps of the fatigue performance bionic test on the twill tubular polyester fabric textile artificial blood vessel are as follows:

[0052] [1] Turn on the power supply, turn on the computer 8 and the DC stabilized power supply 65 equipped with processing and conversion signal software, and preheat for half an hour;

[0053] [2] Add two-thirds of its volume of water 14 to the liquid storage tank 11, and then check the entire test system to ensure that the system can circulate and no water leakage occurs. If there is any inappropriateness, it should be adjusted in time to avoid Increase the test error when adjusting in the middle of the test;

[0054] [3] Select a 3-up and 1-down twill tubular polyester fabric with a diameter of 4 mm, a length of 3 cm, and a warp and weft density of 1300 threads / 10 cm as the textile artificial blood vessel sample A, and place it on the elastic rubber tube 36, Then the left end of the elastic rubber tube 36 that is...

Embodiment 2

[0061] The test procedure of its fatigue performance bionic test is the same as that of Example 1, except that (1) the 2 upper and 2 lower reinforced twill tubular fabrics with a diameter of 16mm, a length of 10cm, and a warp and weft density of 1200 / 10cm are respectively As the textile artificial blood vessel sample A, (2) the pulsation frequency of the electronic peristaltic pump 2 is selected as 6Hz, (3) the maximum pressure that the textile artificial blood vessel sample A bears is adjusted to 2000mmHg, (4) the test time is 720 hours (1 month); The warp and weft density of the textile artificial blood vessel sample A obtained at last are 1100×1190 / 10cm, and the changes of warp and weft density are respectively Based on the above results, it is considered that the textile artificial blood vessel sample A cannot be applied clinically.

Embodiment 3

[0063] The test procedure of its bionic test for fatigue performance is the same as that of Example 1, except that (1) the 3 upper and 1 lower twill tubular fabrics with a diameter of 36 mm, a length of 18 cm, and a warp and weft density of 1300 pieces / 10 cm are used as Textile artificial blood vessel sample A, (2) the pulsation frequency of the electronic peristaltic pump 2 is selected as 10Hz, (3) the maximum pressure that the textile artificial blood vessel sample A bears is adjusted to 120mmHg, (4) the test time is 2610 hours ( 3 months); the warp and weft density of the artificial blood vessel sample obtained at last is 1180×1230 / 10cm, and the change of warp density is 1300 - 1180 1300 × 100 % = 9.2 % > 3 % , The variation of weft density is 1300 ...

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Abstract

The invention relates to a spinning type artificial blood vessel weary performance biological modeling testing device and the testing method thereof. The invention comprises an electronic peristaltic pump, a fluid restrictor, a computer arranged with signal processing and transforming software and data output equipment. The invention is characterized in that the device also comprises a temperature controlling and heating device, a test sample installation frame and a pressure testing device. The testing steps are: 1. preheat testing machine; 2. test system; 3. choose the specimen of the spinning type artificial blood vessel; 4. adjust the pressure testing device; 5. control water temperature; 6. start the electronic peristaltic pump; 7. test and record; 8. evaluate the weary-resistant performance of the spinning type artificial blood vessel. The weary-resistant performance of the spinning type artificial blood vessel can be scientifically tested and appreciated by the device and the testing method disclosed by the device. And the invention solved the technical problem that the prior testing device and the testing method of the prior device have no safe simulation.

Description

technical field [0001] The invention relates to a textile bionic test device, in particular to a bionic test device and a test method for the fatigue performance of textile artificial blood vessels. Background technique [0002] The International Organization for Standardization (ISO) in Geneva gave a descriptive definition of fatigue in the report "General Principles of Metal Fatigue Tests" published in 1964, that is, "the performance change of metallic materials under repeated stress or strain. , generally referring to those changes in properties that lead to cracking or failure". This description is also generally applicable to non-metallic materials. Later, the definition of fatigue became more extensive, and the fatigue definition of textile materials was also described in some books, that is, "fiber products are rarely broken once in actual use, but are often broken under long-term static load or dynamic load. Destruction under load. Although the static load or dynam...

Claims

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Application Information

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IPC IPC(8): G01N3/36G01N9/36
Inventor 王璐赵荟菁金·马汀
Owner DONGHUA UNIV
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