CN110236748B

CN110236748B - Exempt from to make accurate external windowing aortic support of order

Info

Publication number: CN110236748B
Application number: CN201910463921.4A
Authority: CN
Inventors: 肖航; 刘玮
Original assignee: First Affiliated Hospital of PLA Military Medical University
Current assignee: First Affiliated Hospital of PLA Military Medical University
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2021-03-26
Anticipated expiration: 2039-05-30
Also published as: CN110236748A

Abstract

The invention discloses a customization-free accurate extra-corporeal windowing aortic stent, which comprises a metal stent mesh and a covering film, wherein the metal stent is a tubular body, and the shape and the size of meshes of the metal stent mesh are the same; the cover film is formed by sequentially arranging a plurality of elastic cover sheets in an array from head to tail in a sealing and overlapping mode, the cover film covers the metal support, and different marks are engraved on each cover sheet. The customization-free accurate external windowing aortic stent does not need to be customized in advance, and medical workers can perform quick and accurate windowing according to needs in the operation process.

Description

Exempt from to make accurate external windowing aortic support of order

Technical Field

The invention relates to the field of medical instruments, in particular to a customization-free accurate external windowing aortic stent.

Background

And aortic distensible diseases including aortic aneurysm, aortic dissection and the like. Clinically, the aortic dilatation disease is a very dangerous vascular disease, and once the aortic dilatation disease is treated, the aortic dilatation disease should be treated correspondingly as soon as possible. At present, the minimally invasive interventional therapy technology utilizing the intracavity isolation principle is widely utilized, and a compressed aorta stent with a tectorial membrane is delivered to the position of a diseased aorta by a set of delivery system with a thinner caliber and then is released accurately. The aorta bracket is covered on the diseased aorta and forms a new blood flow channel; after the diseased aorta loses the blood supply, the residual blood at the diseased aorta gradually organizes and forms thrombus until gradually recovering to be close to the original shape, thereby achieving the aim of treatment. This technique greatly reduces surgical trauma while allowing the patient to recover more quickly.

However, since there are many branch arteries in the aorta, after the covered aortic stent is placed in the aorta, blood supply to the diseased aorta is lost and blood circulation through the branch arteries is prevented, so that clinically, it is necessary to open windows in the corresponding branch arteries of the aortic stent to maintain blood supply in the branch arteries. In the clinical operation process, some doctors can choose to temporarily open windows on the covered stent according to the condition of a patient, the window opening position is inaccurate or the size is difficult to control due to temporary window opening, and the whole covered stent is damaged due to high window opening difficulty when the control is not good; in part, the covered stent with a window is customized according to the condition of a patient, so that the window opening accuracy can be achieved, but the operation time is inevitably prolonged, the inconvenience is brought to a doctor patient, and particularly, the life risk is caused to a critical patient.

Disclosure of Invention

In order to solve the problems, the invention provides a customization-free accurate external windowing aortic stent which does not need to be customized, and medical workers can rapidly and accurately window on the aortic stent according to the condition of a patient in the using process.

In order to achieve the purpose, the invention is realized by the following technical scheme: a subscription-free precision extra-corporeal fenestration aortic stent, comprising:

the metal stent is a tubular body, and the shape and the size of meshes of the metal stent are the same; and

the covering film is formed by sequentially arranging a plurality of covering sheets at the beginning, the covering film covers the metal support and blocks the meshes, and different marks are engraved on each covering sheet.

Further, the covering pieces sequentially cover the meshes, and the covering pieces are arrayed and overlapped end to end.

Further, the cover piece includes the upper strata membrane and pastes the lower floor film on the upper strata membrane, the edge of upper strata membrane surpasss the edge of lower floor film, the lower floor film can inlay and establish in the mesh.

Furthermore, the metal support net is provided with positioning pins extending towards the inside of the metal support net, and the positioning pins sequentially penetrate through the mutually overlapped upper layer films.

Further, the end of the positioning pin is provided with a fixing cap.

Further, the top of the fixing cap is provided with a hook.

Further, the lower surface of the covering piece is provided with waterproof sealant, and the waterproof sealant can seal the two adjacent overlapped covering pieces with a film.

The customization-free precise external windowing aortic stent at least comprises the following advantages:

the customization-free precise external windowing aortic stent comprises a metal stent mesh and a covering film. The covering film is formed by sequentially arranging a plurality of elastic covering sheets in an array from head to tail in a sealing and overlapping manner. When windowing is needed, simulation positioning is carried out through a computer, the covering piece corresponding to the branch artery is found accurately, and the covering piece at the corresponding position is taken down according to the digital mark on the covering piece, so that the accuracy of windowing can be guaranteed. Because the cover film comprises a plurality of single cover pieces, the single cover piece can be quickly taken down, so that the windowing time can be shortened, the windowing quality is improved, the whole operation time is shortened, the operation success rate is finally improved, and meanwhile, the operation on the whole support can be avoided, and the misoperation is reduced.

Drawings

Fig. 1 is a schematic view of a customized-free precise extra-corporeal fenestration aortic stent according to this embodiment;

fig. 2 is a schematic deployment view of the non-customized precise in-vitro fenestration aortic stent of the present embodiment;

FIG. 3 is a schematic view of a metal stent mesh covered by a single cover sheet in the non-customized precise extra-corporeal fenestration aortic stent according to the embodiment;

fig. 4 is a cross-sectional view of the cover sheet embedded in the mesh in the non-customized precise extra-corporeal fenestration aortic stent of this embodiment;

reference numerals: 10-free accurate in vitro fenestration aorta stent, 100-metal stent mesh, 110-grid, 120-positioning pin, 130-fixing cap, 131-hook, 200-covering film, 210-covering film, 211-upper layer film, 212-lower layer film.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 4, a free-form precise external windowing aortic stent 10 includes a metal stent mesh 100 and a cover film 200.

Referring to fig. 1 to 3, in particular, the metal stent mesh is a tubular body. The mesh openings 110 of the metal stent netting 100 are identical in shape and size. In this implementation. The mesh 110 may be square mesh 110 formed by criss-cross of wires, or inclined diamond mesh 110 formed by obliquely crossing of wires. The cover film 200 is formed by sequentially and hermetically overlapping a plurality of cover sheets 210 in an array from end to end. The cover film 200 is covered on the metal holder. The covering sheet 210 is jammed over the mesh 110. Each of the cover sheets is imprinted with a different mark. The mark can be a regularly arranged number, a specific symbol or a coordinate position. During operation, firstly, the computer is used for simulating and positioning the pathological changes and the covered stent, so that the position of the branch artery corresponding to the position needing windowing on the free-customized accurate external windowing aortic stent 10 can be accurately determined; then, according to the marked position, the covering sheet 210 at the corresponding position is removed, so that the fenestration can be formed, and the exempt precise in-vitro fenestration aortic stent 10 can be communicated with the branch artery; finally, the non-customized precise external windowing aortic stent 10 is sent to a preset position in the aorta. Through this exempt from to customize accurate external windowing aortic support 10, need not customize in advance, then can be quick, accurate windowing, can reduce the windowing time, improve the windowing quality, and then reduce whole operation time, finally improve the operation success rate, simultaneously, this kind of mode can also avoid operating whole support to reduce the maloperation.

With continued reference to fig. 1, in this embodiment, the covering sheets 210 are sequentially overlaid on the mesh 110, and the covering sheets 210 are arrayed and stacked end-to-end. When the non-customized precise extra-corporeal aortic stent 10 is placed in the aorta, the head end of the cover sheet 210 is located at the blood inlet end of the aorta, and the tail end of the cover sheet 210 is located at the bleeding end of the aorta (the direction of the arrow in fig. 1 is the blood flow direction). When the non-customized accurate extracorporeal windowing aortic stent 10 is positioned in an aorta, under the action of blood pressure, the arrayed end-to-end overlapping cover sheets 210 form fish scales which are mutually attached to form a blood flow channel, and the fish scale type bionic structure is convenient for blood circulation and can prevent blood leakage.

Referring to fig. 1 and 4, in the present embodiment, the covering sheet 210 includes an upper film 211 and a lower film 212 attached to the upper film 211. The edge of the upper film 211 extends beyond the edge of the lower film 212, and the lower film 212 can be embedded in the square mesh 110. In this way, the covering sheets 210 can be pre-fixed, and the covering sheets 210 are regularly arranged, so that the distance between the covering sheets 210 is kept unchanged, and the covering sheets 210 are prevented from being dislocated and leaking, thereby ensuring the sealing performance of the whole covering film 200. In the present embodiment, the metal stent mesh 100 is provided with positioning pins 120 extending toward the inside of the metal stent mesh 100. The positioning pins 120 sequentially pass through the upper films 211 stacked on each other. The end of the positioning pin 120 is provided with a fixing cap 130. The top of the fixing cap 130 is provided with a hook 131. The positioning pin 120 is arranged inside the metal support net 100, so that the smoothness of the outer wall of the aorta support 10 with an accurate external windowing is guaranteed, the human tissue is prevented from being scratched by the raised positioning pin 120, and the comfort of a human body can be improved. The two pieces of the upper film 211 stacked on each other can be further fixed by the positioning pins 120 and the fixing caps 130, and knocking and leakage between the upper films 211 can be prevented. The hook 131 on the fixing cap 130 is convenient to take down the fixing cap 130, when the single covering sheet 210 needs to be removed, the straight rod tool with the hook 131 at the end portion can extend into the aorta support 10 free of customization of accurate external windowing, the hook 131 on the straight rod is hung on the hook 131 on the fixing cap 130, the straight rod is pulled, the fixing cap 130 can be taken down, and the corresponding covering sheets 210 can be taken down in sequence.

In this embodiment, the lower surface of the cover sheet 210 is provided with a waterproof sealant. The waterproof sealant can further seal the two cover sheets 210 that are adjacently stacked. By the waterproof sealant, the sealability between the cover sheets 210 is further increased.

The specific use method of the above-mentioned customization-free precise external windowing aortic stent 10 is as follows:

during surgery, the non-customized precise external windowing aorta stent 10 is combined with an aorta in a computer, so that the head end of the cover sheet 210 is positioned at the blood inlet end of the aorta, and the tail end of the cover sheet 210 is positioned at the bleeding end of the aorta; subsequently, simulation positioning is carried out on the pathological changes and the scanning of the covered stent by calculation, and the position of the branch artery corresponding to the covered stent and needing windowing can be accurately determined according to the marks; then, a straight rod with a hook 131 at the end is inserted into the non-customized precise external windowing aortic stent 10, the hook 131 on the straight rod is hung on the hook 131 on the fixing cap 130, and the fixing cap 130 can be taken down by lifting the straight rod; then, pressing the single cover sheet 210 inwards from the outside of the non-customized precise in-vitro fenestration aortic stent 10 until the cover sheet 210 falls off, so that a window can be formed, and the covered stent can be communicated with the branch artery; and finally, after the windowed non-customized accurate in-vitro windowing aortic stent 10 is sent to a preset position in the aorta, the subsequent treatment can be carried out.

The non-customized precise external windowing aortic stent 10 comprises a metal stent mesh 100 and a covering film 200. The cover film 200 is formed from a plurality of cover sheets 210 in an array and stacked end-to-end. When the window is required to be opened, the window is simulated in advance according to the computer, and the covering piece 210 at the corresponding position is determined to be taken down according to the mark, so that the window opening accuracy can be ensured. Because the cover film 200 is composed of a plurality of single cover sheets 210, the single cover sheets 210 can be quickly taken down, the windowing time can be shortened, the windowing quality is improved, the whole operation time is shortened, the operation success rate is finally improved, and meanwhile, the operation on the whole bracket can be avoided, so that the misoperation is reduced.

The arrangement mode of the covering sheet 210 adopts a fish scale type bionic structure, when the non-customized accurate extra-corporeal fenestration aorta stent 10 is placed in the aorta, the head end of the covering sheet 210 is positioned at the inlet end of the aorta, and the tail end of the covering sheet 210 is positioned at the outlet end of the aorta. Blood flows in from the inlet end and out from the outlet end. The structure not only facilitates the circulation of blood, but also can prevent the blood from leaking. The cover sheet 210 includes an upper film 211 and a lower film 212 adhered to the upper film 211. The underlayer 212 can be embedded within the square mesh 110. In this way, the covering sheets 210 can be pre-fixed, and the covering sheets 210 are regularly arranged, so that the distance between the covering sheets 210 is kept unchanged, and the covering sheets 210 are prevented from being dislocated and leaking, thereby ensuring the sealing performance of the whole covering film 200. The positioning pin 120 and the fixing cap 130 can further fix the two upper films 211 stacked on each other, thereby preventing the upper films 211 from being knocked to bend and causing leakage. The hook 131 of the fixing cap 130 facilitates the removal of the fixing cap 130. The waterproof sealant further increases the sealability between the cover sheets 210.

Finally, it should be noted that: while there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An order-free precision extra-corporeal fenestration aortic stent, comprising:

the covering film is formed by sequentially arranging a plurality of elastic covering sheets in an array from head to tail in a sealing and overlapping mode, the covering film covers the metal support, and different marks are engraved on each covering sheet.

2. The custom-made precision extra-corporeal fenestration aortic stent of claim 1, wherein the cover sheets are sequentially overlaid on the mesh, the cover sheets being in an array and stacked end-to-end.

3. The free-from-order precision extra-corporeal fenestration aortic stent of claim 2, wherein the cover sheet comprises an upper membrane and a lower membrane adhered to the upper membrane, the upper membrane having an edge extending beyond an edge of the lower membrane, and the lower membrane being capable of being embedded in the mesh.

4. The free-from-subscription precision extra-corporeal fenestration aortic stent of claim 3, wherein the intersections of the metal stent mesh are provided with positioning pins extending towards the inside of the metal stent mesh, and the positioning pins sequentially penetrate through the overlying membranes.

5. The custom-free precision extra-corporeal fenestration aortic stent of claim 4, wherein the ends of the locating pins are provided with retaining caps.

6. The custom-free precision extra-corporeal fenestration aortic stent of claim 5, wherein the top of the retaining cap is provided with a hook.

7. The free-from-order precision extra-corporeal fenestration aortic stent of claim 4, wherein the lower surface of the upper membrane is provided with a waterproof sealant that can seal two of the upper membranes that are adjacently superimposed.