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Intravascular stent

A vascular stent and blood vessel technology, applied in the field of medical vascular stent and vascular stent, can solve problems such as affecting the normal physiological function of organs/tissues, affecting the blood supply of bifurcated blood vessels, etc., and achieve the effect of reducing the pressure value and improving the effect.

Pending Publication Date: 2018-06-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these aspects may affect the blood supply of bifurcated blood vessels, and then affect the normal physiological functions of organs / tissues downstream of the bifurcated blood vessels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 2 As shown, through the conventional vascular stent intervention method, the vascular stent 2 provided by the present invention with a local stenosis section is placed on the saccular aneurysm site, the local stenosis section is located at the entrance of the aneurysm, and the outer wall of the conventional section of the vascular stent 2 is in contact with the blood vessel. Wall 1 fits. Ideally, the length a of the local stenosis is equal to the length b of the opening of the aneurysm along the axial direction of the blood vessel, or 0.8b<a<1.2b, and a can also be set as a series of sizes to facilitate clinical selection. The stenotic sectional area of ​​the local stenosis segment is not greater than 30% of the sectional area of ​​the normal blood vessel lumen at this position. Usually, the diameter of the designed stent body is equal to or slightly larger than the inner diameter of the blood vessel at the desired stent site.

Embodiment 2

[0031] like image 3 As shown, by conventional vascular stent intervention methods, the vascular stent provided by the present invention with a local narrow section is placed at the fusiform aneurysm site, and the local narrow section is located at the aneurysm site, and the outer wall of the conventional section of the vascular stent 2 and Vascular wall 1 fit. The ideal state is: the length a of the local stenosis on the vascular stent is equal to the length c of the aneurysm along the vascular axis, or 0.8c<a<1.2c, and a can also be set as a series of sizes for the convenience of clinical selection . The stenotic sectional area of ​​the local stenosis segment is not greater than 30% of the sectional area of ​​the normal blood vessel lumen at this site. Usually, the diameter of the designed stent body is equal to or slightly larger than the inner diameter of the blood vessel at the desired stent site.

Embodiment 3

[0033] like Figure 4 As shown, the vascular stent with a partially enlarged section provided by the present invention is placed in a bifurcated vessel through a conventional vascular stent intervention method, and the outer wall of the conventional section of the vascular stent 2 is attached to the vessel wall 1 . The ideal state is: the local enlarged section is placed at the entrance of the bifurcation vessel, the enlarged cross-sectional area of ​​the local enlarged section is not greater than 30% of the cross-sectional area of ​​the main blood vessel at the bifurcation, and the axial length a of the local enlarged section is the bifurcation vessel at the implantation site 0.8-3 times the pipe diameter d, a can also be set as a series of sizes, so as to facilitate clinical selection and use.

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Abstract

The invention discloses an intravascular stent, and belongs to the technical field of a medical intravascular stent. Specific to the shortcoming that an arterial aneurysm stent cannot effectively isolate pressure in the arterial aneurysm cavity or a bifurcated blood vessel block the blood supply of the branch blood vessel after involving in the stent, the invention provides a novel intravascular stent; the intravascular stent is the intravascular stent with lessened or enlarged local section, and has a local narrow section and a local expanding section; through changing the diameter of the intravascular stent, the pressure value of the local part in the blood vessel is changed, and the operation difficulty of the existing implant technology of the intravascular stent cannot be increased.

Description

technical field [0001] The invention belongs to the technical field of medical vascular stents, in particular to a vascular stent implanted in an aneurysm or a blood vessel bifurcation. Background technique [0002] Aneurysm is a multiple disease in the arterial system, which is characterized by local swelling of the artery and a decrease in the mechanical properties of the vessel wall. A ruptured aneurysm can be very dangerous, even life-threatening. The two types of aneurysms that are common and dangerous in clinical practice are aortic aneurysm and intracranial aneurysm. Aortic aneurysms mostly occur in the thoracic aorta and abdominal aorta, and are mostly fusiform. Intracranial aneurysms occur in intracranial arteries, mostly saccular aneurysms with one side dilated. Interventional approach is one of the main ways to surgically reduce the pressure inside the aneurysm and prevent its enlargement and rupture. Interventional stenting at the aneurysm site can weaken the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/90A61F2/91
CPCA61F2/90A61F2/91A61F2230/0063
Inventor 孙安强樊瑜波邓小燕
Owner BEIHANG UNIV
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