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Vascular covered stent bending force and straightening force dynamically testing device and method

A covered stent and dynamic testing technology, which is applied in the direction of testing material strength, measuring devices, instruments, etc. by applying a stable bending force, can solve problems such as low efficiency and poor test stability, and achieve high accuracy, high reliability, and The effect of simple structure

Inactive Publication Date: 2017-10-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this test method is that the test stability is poor, it is greatly affected by the surrounding environment and human factors, and the efficiency is low
At present, there is no report on the vascular literature data on the in vitro continuous dynamic testing of the bending force and straightening force of the vascular stent graft. Therefore, there is an urgent need for a dynamic testing device for the bending force and the straightening force of the vascular stent graft to overcome the above defects.

Method used

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  • Vascular covered stent bending force and straightening force dynamically testing device and method
  • Vascular covered stent bending force and straightening force dynamically testing device and method
  • Vascular covered stent bending force and straightening force dynamically testing device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] figure 1 This is a schematic diagram of a dynamic test device for the bending force and rectilinear force of the vascular stent graft. The dynamic test device for the bending force and rectilinear force of the vascular stent graft includes a device for loading the stent graft and realizing the dynamic bending and recoil of the stent graft. Straight bending force and return force test components; and a special-shaped force test indenter used to simulate the contact of the vascular stent graft in the body with the host vessel.

[0043] Combine figure 2 , The bending force and return force test assembly consists of the part holder 101, the miniature synchronous slow-speed motor 102, the fixed part 103 for connecting the motor, the threaded connecting rod 104, the smooth connecting rod 105, the smooth sample loading rod 106 and the fixed position nut 107, etc. composition.

[0044] The miniature synchronous slow-speed motor 102 is fixed on the component fixing base 101. One en...

Embodiment 2

[0061] figure 1 This is a schematic diagram of a dynamic test device for the bending force and rectilinear force of the vascular stent graft. The dynamic test device for the bending force and rectilinear force of the vascular stent graft includes a device for loading the stent graft and realizing the dynamic bending and recoil of the stent graft. Straight bending force and return force test components; and a special-shaped force test indenter used to simulate the contact of the vascular stent graft in the body with the host vessel.

[0062] Combine figure 2 , The bending force and return force test assembly consists of the part holder 101, the miniature synchronous slow-speed motor 102, the fixed part 103 for connecting the motor, the threaded connecting rod 104, the smooth connecting rod 105, the smooth sample loading rod 106 and the fixed position nut 107, etc. composition.

[0063] The miniature synchronous slow-speed motor 102 is fixed on the component fixing base 101. One en...

Embodiment 3

[0079] figure 1 This is a schematic diagram of a dynamic test device for the bending force and rectilinear force of the vascular stent graft. The dynamic test device for the bending force and rectilinear force of the vascular stent graft includes a device for loading the stent graft and realizing the dynamic bending and recoil of the stent graft. Straight bending force and return force test components; and a special-shaped force test indenter used to simulate the contact of the vascular stent graft in the body with the host vessel.

[0080] Combine figure 2 , The bending force and return force test assembly consists of the part holder 101, the miniature synchronous slow-speed motor 102, the fixed part 103 for connecting the motor, the threaded connecting rod 104, the smooth connecting rod 105, the smooth sample loading rod 106 and the fixed position nut 107, etc. composition.

[0081] The miniature synchronous slow-speed motor 102 is fixed on the component fixing base 101. One en...

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Abstract

The invention provides a vascular covered stent bending force and straightening force dynamically testing device. The device comprises a bending force and straightening force testing assembly for realizing covered stent dynamical bending and straightening and an anomalous force value testing pressing head for simulating contact cases of a covered stent with a host blood vessel in the body. The bending force and straightening force testing assembly comprises a part fixing base, a micro-synchronous slow motor is fixed to the part fixing base, a fixing part for connecting a motor is fixedly connected to a rotation shaft of the motor, a smooth connecting rod sleeves the fixing part for connecting the motor, the smooth connecting rod is parallel to a smooth sample-carrying rod, the smooth connecting rod and the smooth sample-carrying rod sleeve and are positioned to two threaded connecting rods, the anomalous force value testing pressing head comprises a screw rod connected to a force sensor and an anomalous contact surface stably contacting with the vascular covered stent, and the screw rod is connected to the anomalous contact surface. The invention also provides a vascular covered stent bending force and straightening force dynamically testing method. The device has the advantages of simple structure, convenient operation, high precision and good reliability.

Description

Technical field [0001] The invention relates to a device and a method for testing the bending force and the straightening force of a blood vessel covered stent when it is implanted in a curved blood vessel part of a human body, and belongs to the technical field of biomedical textiles. Background technique [0002] The vascular stent graft is the main part of endovascular isolation for the treatment of aneurysms and arterial dissections. It is used to isolate the diseased segment from the normal blood flow, so as to avoid serious consequences such as rupture of aneurysm, increased congestion of arterial dissection and vascular rupture. When the vascular stent graft is placed in a portion of a blood vessel with a large degree of curvature in the human body, due to the rigidity of the vascular stent graft itself, many complications may occur. When Stanford B-type aortic dissection occurs, it is usually necessary to place and fix one end of the vascular stent graft on the aortic arc...

Claims

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Application Information

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IPC IPC(8): G01N3/20
CPCG01N3/20G01N2203/0023
Inventor 关颖王璐林婧赵帆王富军关国平
Owner DONGHUA UNIV
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