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Apparatus for taking out metal stent in vascular or non-vascular cavity channel

A metal stent and extraction device technology, applied in stents, medical science, prostheses, etc., can solve the problems of restenosis stents, displacement, fatigue fracture, etc., and achieve the effects of small side effects, convenient operation, and easy implementation.

Inactive Publication Date: 2009-04-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to fundamentally solve the problems of restenosis and stent displacement or fatigue fracture after metal stents are implanted in blood vessels or non-vascular lumens, the present invention provides a device for removing metal stents from blood vessels or non-vascular lumens, and particularly relates to a Metal stent removal device for vascular or non-vascular lumen based on induced memory alloy memory effect

Method used

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  • Apparatus for taking out metal stent in vascular or non-vascular cavity channel
  • Apparatus for taking out metal stent in vascular or non-vascular cavity channel
  • Apparatus for taking out metal stent in vascular or non-vascular cavity channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Using the external alternating electromagnetic field generator 5 as the external energy control device, using the embedded system as the core component of the control device, using the software operation interface to adjust the magnetic field frequency and magnetic field strength, and using the tube mesh memory nickel-titanium alloy bracket with memory effect 1. The flow chart of the control system is as follows: Figure 6 shown.

[0033] Such as Figure 7 As mentioned above, the control system hardware includes a power circuit, a main circuit, a central controller and a protection circuit. Its working process is as follows. After the alternating current is transformed and rectified, the direct current is applied to the IGBT through the excitation coil. The IGBT is turned on or off under the control of the driving signal, and a high-frequency electromagnetic field is generated in the excitation coil. This electromagnetic field penetrates the body surface After that, it...

Embodiment 2

[0047] As shown in Figure 4, the external energy supply device is a surface frosted laser fiber 8 and a gas laser 6 with a continuous emitting surface, and a tube mesh memory nickel-titanium-based alloy bracket 1 with a memory effect is used. The laser is connected to the frosted optical fiber through a conductive optical fiber. The frosted optical fiber is placed in a tube-network memory nickel-titanium-based alloy stent with memory effect.

[0048] Step 1 and Step 2 are the same as in Embodiment 1, except that the external alternating electromagnetic field generating device in Step 1 is changed to a surface-brushed laser fiber and a gas laser with a continuous emission surface.

[0049] Step 3: When the tube-network memory Nitinol-based alloy stent 1 with memory effect needs to be taken out, the laser 6 is turned on, and the laser light is emitted from the surroundings of the frosted optical fiber 8 . Because blood absorbs very little laser light in the selected band, most o...

Embodiment 3

[0052] As shown in Figure 5, the equipment for external energy supply is an external DC power supply 9, a micro transmission line 10, and a tube-network nickel-titanium-based alloy support 1 with a memory effect. The mesh nickel-titanium-based alloy stents 1 are connected. Surgery is performed in the following steps:

[0053] Step 1 and Step 2 are the same as in Embodiment 1, except that the external alternating electromagnetic field generating device in step 1 is changed to an external DC power supply and a fine transmission line connected thereto.

[0054] Step 3: After the preparations are ready, connect the lead wire to the tube-mesh nitinol-based alloy stent 1 with memory effect. Turn on the power supply, and the tube-mesh nickel-titanium-based alloy stent 1 with memory effect will shrink at the phase transition temperature after heating, and surround the guide wire and the balloon.

[0055] Step 4: Take out the tube-mesh nickel-titanium-based alloy stent 1 with memory ...

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Abstract

The invention relates to a device for taking out a metal bracket in a vas or a non-vascular cavity. The device comprises a phase transition energy supply device for a shape memory alloy bracket, the shape memory alloy bracket having memory effect and a control system for the energy supply device, wherein the phase transition energy supply device for the shape memory alloy bracket supplies phase transition energy to the shape memory alloy bracket to induce the memory effect of the shape memory alloy bracket having the memory effect, so as to make the shape memory alloy bracket having the memory effect recover to a shrinkage state and clasp a guide wire and a saccule; and under X-ray or CT image monitoring, the shape memory alloy bracket having the memory effect is taken out by means of an intervening instrument. The device provides a method for taking out the bracket in the vas or the non-vascular cavity, and the method has the advantages of compact and clear principle, convenient operation, safety, easy implementation, and is suitable for clinical application; and the implementation of an operation process is based on the prior mature vas or non-vascular intervening technique and has little side effect to the body.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a device for taking out a metal stent from a blood vessel or non-vascular lumen. Background technique [0002] At present, among various major diseases faced by human beings, cardiovascular disease has become one of the most fatal diseases. According to statistics, 16.7 million people die from cardiovascular and cerebrovascular diseases every year in the world, of which 7.2 million die from cardiovascular and cerebrovascular diseases and 5.5 million suffer from cerebral apoplexy. Research on the treatment and prevention of cardiovascular and cerebrovascular diseases has always been a major topic in the field of clinical medicine and biomedical engineering at home and abroad. So far, the traditional means of treating cardiovascular and cerebrovascular diseases are still drug therapy and surgery. Drug therapy is effective in the case of mild arterial stenosis, ...

Claims

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Application Information

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IPC IPC(8): A61F2/84A61F2/95
Inventor 项士海康雁
Owner NORTHEASTERN UNIV
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