Near-physiological pulsating flow loading device for fatigue test of intravascular stent

Abstract

The invention provides a near-physiological pulsating flow loading device for an intravascular stent fatigue test, and belongs to the technical field of medical instruments, and the near-physiological pulsating flow loading device for the intravascular stent fatigue test comprises a simulated blood vessel which is provided with a detection section for placing a stent to be tested; simulation liquid is suitable for circulating in the simulation blood vessel; a loading device which is internally provided with multiple sections of simulated blood vessels; the detection section of the simulated blood vessel is arranged in the loading device; according to the near-physiological pulsating flow loading device for the fatigue test of the intravascular stent, the pressure and the flow which are similar to the physiological state received after the stent is implanted into the human body are provided. The pulsating pressure enables the simulated blood vessel to generate periodic expansion and contraction deformation, and provides a compression acting force for the stent; the pulsating flow provides pulsating fluid shear force for the stent. The device more accurately simulates the real state of the intravascular stent in the blood vessel of the human body, and solves the near-physiological pulsation loading problem in the fatigue test of the intravascular stent.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a near-physiological pulsating flow loading device for fatigue testing of vascular stents. Background technique [0002] Vascular stent implantation, as a common method of interventional therapy for cardiovascular diseases, has many advantages such as small trauma, fast postoperative recovery, and stable therapeutic effect. [0003] After the vascular stent is implanted in the human body, it will be subject to the shear force of the blood flow in the blood vessel and the tensile and compressive stress caused by the dilation and contraction of the blood vessel for a long time, so that the vascular stent may fail due to fatigue. [0004] At present, the vascular stent fatigue test device can only simulate the relaxation of the vascular stent, but ignores that the vascular stent is also subjected to the shear force of the blood flow after being implanted in the blood vessel,...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the vascular stent fatigue test device in the prior art that can only simulate the relaxation of the vascular stent, while ignoring that the vascular stent is also subjected to the shear force of the blood flow after it is implanted into the blood vessel. , thus leading to the defect of inaccuracy in the test of the fatigue performance of the vascular stent, thereby providing a near-physiological pulsating flow loading device for the fatigue test of the vascular stent

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