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Artificial blood vessel compliance emulation test device and test method thereof

A technology of artificial blood vessels and simulation testing, which is applied in the direction of applying stable tension/pressure to test the strength of materials, and can solve problems that have not yet been found

Inactive Publication Date: 2009-03-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching domestic and foreign patent documents, a U.S. patent with the patent number USP4972721 introduced an instrument for testing the compliance of artificial blood vessels, but this instrument failed to fully simulate real conditions such as human body ambient temperature and internal pulse pressure of blood vessels. Therefore, there is no device and test method suitable for testing the compliance of artificial blood vessels in a fully simulated human environment.

Method used

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  • Artificial blood vessel compliance emulation test device and test method thereof
  • Artificial blood vessel compliance emulation test device and test method thereof
  • Artificial blood vessel compliance emulation test device and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The compliance simulation test was carried out on a gelatin-coated polyester artificial blood vessel with an inner diameter of 6mm, a length of 6cm, and a wall thickness of 1mm. It is known that this artificial blood vessel is suitable for the right renal artery of the human body.

[0072] The specific test steps are as follows:

[0073] [1] Turn on the power supply, turn on the computer 7 equipped with processing and conversion signal software;

[0074] [2] Add 2 / 3 of its volume of simulated blood 1B into the liquid storage tank 1A of the temperature-controlled heating device 1, and then check the entire test system to ensure that the system can circulate and not leak, so as to avoid adjustments in the middle of the test. increase test error;

[0075] [3] Select artificial blood vessel sample A: gelatin-coated polyester artificial blood vessel sample A with an inner diameter of 6 mm, a length of 6 cm, and a wall thickness of 1 mm. Diameter is 6mm and inner diameter i...

Embodiment 2

[0090] The compliance simulation test is carried out on a gelatin-coated polyester artificial blood vessel with an inner diameter of 23mm, a length of 23cm, and a wall thickness of 1mm. It is known that this artificial blood vessel is suitable for the abdominal aorta of a human body. The specific operation steps are the same as those in Example 1, except that (1) select artificial blood vessel sample A: an inner diameter of 23 mm, a length of 23 cm, and a wall thickness of 1 mm gelatin-coated polyester artificial blood vessel sample A, the number is 3, (2) according to the artificial blood vessel sample A Inner diameter and length select the elastic rubber tube 36 whose outer diameter is 23mm and inner diameter is 21.85mm and length is 25cm, select the three-way sample clamping rod 37 whose outer diameter matches it according to the inner diameter of the elastic rubber tube 36, (3) according to this The part of the artificial blood vessel sample A used in the human body is the ...

Embodiment 3

[0102] The compliance simulation test was carried out on a woven polyester artificial blood vessel with an inner diameter of 33 mm, a length of 33 cm, and a wall thickness of 0.8 mm. It is known that the artificial blood vessel with this inner diameter is used at the ascending aorta of a human body. The specific operation steps are the same as in Example 1. The difference is that (1) artificial blood vessel sample A is selected: woven polyester artificial blood vessel sample A with an inner diameter of 33 mm, a length of 33 cm, and a wall thickness of 0.8 mm. The inner diameter and length of A select the elastic rubber tube 36 whose outer diameter is 33mm and inner diameter is 31.35mm and the length is 35cm, and select the three-way sample clamping rod 37 whose outer diameter matches it according to the inner diameter of the elastic rubber tube 36, (3) According to this artificial blood vessel sample A, the use part in the human body is the ascending aorta of the human body, so...

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Abstract

The invention belongs to the field of test instruments for medical flexible materials, and provides a device for simulation testing of the compliance of artificial blood vessels and a method thereof. The device comprises a temperature control heating device, an impulse pressure waveform generating device for fully-true simulated human body arteries, a clamping device for artificial blood vessel samples, a laser caliper, a flow-guiding silicone tube, a conducting wire, a computer provided with software for processing and converting signals, a display and a printer. With the device and the testing method thereof, the simulation testing for the compliance of the artificial blood vessels used at different parts of human body can be performed, which creates a good condition for clinical application in the medical field.

Description

technical field [0001] The invention belongs to the field of flexible material testing instruments, and relates to an artificial blood vessel compliance simulation testing device and a testing method thereof. Background technique [0002] Human arteries have viscoelastic properties, which play an important role in cardiovascular function. When the heart contracts, the blood vessels are filled, and the walls of the vessels will expand. This expansion plays an important role in stabilizing blood. The compliance of the artificial blood vessel refers to the deformation response of the artificial blood vessel to the internal stress of the pipeline. Compliance plays an important role in graft complications, especially at the anastomosis. With the increase of transplantation time in vivo, the compliance of implanted vessels decreased to 1 / 3 of the original value with the proliferation of fibrous tissue. Loss of compliance will increase the probability of thrombus in the lumen, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
Inventor 王璐姜华杜令洋王富军李毓陵丁辛
Owner DONGHUA UNIV
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