CN109009563A - A kind of improved arch of aorta overlay film frame type blood vessel - Google Patents

Abstract

An improved aortic arch stent graft type blood vessel, including an aortic stent vessel and three branch arterial stent vessels, the aortic stent vessel is in a pre-curved shape, and the aortic stent vessel includes a proximal end section, a depression and a distal end section , the concave portion includes a first step and a second step, an opening 1 is opened in the middle and upper part of the right side wall of the proximal end section, an opening 2 is opened in the right side of the first step, and an opening 2 is opened in the middle and upper part of the left side wall of the distal end section. Opening 3, opening 1, opening 2 and opening 3 are respectively fixed with inner chimney support 1, inner chimney support 2 and inner chimney support 3 respectively, and the three branch artery stents are respectively packed in said inner chimney support 1 and inner chimney support Support two and inner chimney support three. It can prevent the two inner chimney stents at the proximal end from interfering with each other during compression, making it easier for the aortic stent to be compressed and placed into a delivery system with a smaller diameter, and it is easier for the guide wire and catheter to select each inner chimney stent separately.

Description

An improved aortic arch stent-graft type vessel

technical field

The invention relates to the field of implantable blood vessels, and more specifically refers to an improved aortic arch covered stent-type blood vessel.

Background technique

The Chinese invention patent with the authorized notification number CN 102973303B is an aortic arch stent-graft type vessel invented by the applicant, which includes an aortic stent vessel and three branch arterial stent vessels. A section of depression is set on the aortic stent vessel. The concave portion includes a left side wall close to the proximal end, a right side wall away from the proximal end, and a bottom wall connecting the left and right side walls. The left side wall of the concave portion has two openings, and the right side wall has one or Two openings, each opening is fixed with a section of inner chimney bracket with a diameter equivalent to the opening, the inner chimney bracket extends along the side wall of the aortic stent in the direction away from the depression, and the branch arterial stent is packaged in the Inside the chimney bracket.

During the operation, the compressed aortic stent is delivered to the location of the vascular lesion through a delivery system with a narrow diameter. However, since the two inner chimney stents on the same side wall in the aortic stent extend along the side wall of the aortic stent in the direction away from the depression, the two inner chimney stents interfere with each other in the radial direction when compressed, affecting the entire aortic Compression of stent vessels. After the aortic stent is released, the two inner chimney stents overlap each other in the radial direction, which brings difficulties to the delivery and release of the branch arterial stents, which may cause the simultaneous delivery and release of the two branch arterial stents in the same inner chimney stent Inside. In addition, the aortic stent has a linear tubular structure, and after being transported into the aortic arch and released, its two ends generate relatively large resilience, which brings great pressure to the blood vessels at the corresponding position, and even ruptures the blood vessels. For this reason, the inventor has proposed improvement to this.

Contents of the invention

The present invention provides an improved aortic arch stent-graft type blood vessel to solve the problem that in the existing aortic arch stent-graft type blood vessel, two inner chimney stents arranged side by side interfere with each other in the radial direction when compressed, which affects the entire aortic stent-graft blood vessel. The compression of the two inner chimney stents overlaps each other in the radial direction, which brings difficulties to the delivery and release of the branch arterial stent.

The present invention adopts following technical scheme:

An improved aortic arch stent-graft blood vessel, comprising an aortic stent vessel and three branch arterial stent vessels, the aortic stent vessel is in a pre-curved shape, and the pre-curvature of the aortic stent vessel is smaller than the curvature of the aortic arch of a human body degree, the aortic stent blood vessel includes a proximal end section, a distal end section, and a depression between the proximal end section and the distal end section, and the depression is provided with first steps from left to right and the second step, the upper middle part of the right side wall of the proximal end section is provided with an opening one, and the left side of the first step is fixedly connected to the middle lower part of the right side wall of the proximal end section through a film one, Opening 2 is opened on the right side of the first step, and the right side of the second step is connected to the middle and lower part of the left side wall of the distal end section through the covering film 2. The upper part is provided with an opening three, and the opening one, the opening two and the opening three are correspondingly fixed with the inner chimney support one, the inner chimney support two and the inner chimney support three respectively, and the inner chimney support one and the inner chimney support three are respectively along the The inner wall of the near-center end section and the far-center end section are sewed together, the inner chimney support two is sewed along the inner wall of the first step, the left end of the inner chimney support two and the right end of the inner chimney support one pass through the The coating one is separated, and the three branch arterial stents are separately packaged in the first inner chimney stent, the second inner chimney stent and the third inner chimney stent.

Further, the first coating and the second coating are annular structures with a wide top and a narrow bottom.

Further, the right end of the inner chimney support 1 and the left end of the inner chimney support 3 protrude from the opening 1 and the opening 3 respectively, and the protruding lengths are 3-5 mm.

Further, the maximum lengths of the upper parts of the first coating and the second coating are both 5-12 mm.

Further, the top, bottom, front end and rear end of the outer circumference of the inner chimney support fixed at one of the openings are respectively provided with an 8-shaped developing mark, and the inner chimney support one protruding from the opening one The top, bottom, front and rear of the outer circumference of the front end are also respectively provided with a font development mark.

Further, the top, bottom, front end and rear end of the outer circumference of the inner chimney support three fixed at the three openings are respectively provided with an 8-shaped developing mark, and the inner chimney support three protruding from the opening three The top, bottom, front and rear of the outer circumference of the front end are respectively provided with an 8-shaped development mark.

Further, the second opening is tangent to the inner top surface of the first step, and the top surface of the first step is slightly higher than the curved surface corresponding to the bottom end of the first step.

Further, the right end surface of the first step is an inclined surface, which forms an obtuse angle with the top surface of the second step, and the second opening is an oblique cut formed on the inclined surface.

Further, the top, bottom, front and rear ends of the two outer circumferences of the inner chimney bracket fixed at the two openings are respectively provided with an 8-shaped developing mark.

Further, the aortic stent blood vessel is composed of a tubular membrane 1 and a plurality of ring-shaped corrugated stents 1 sewn in the tubular membrane 1 at intervals, and the inner chimney stent 1, the inner chimney stent 2 and the inner chimney stent 3 each include a Tubular membrane 2 and a plurality of ring-shaped wave-shaped brackets 2 sewn in the tubular membrane 2 at intervals, and the outer sides of two adjacent ring-shaped waveform brackets 2 in each inner chimney bracket are correspondingly provided with a ring-shaped waveform bracket 1, And the sum of the widths of the two ring-shaped support two is equal to the width of the corresponding ring-shaped wave-shaped support one.

As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

1. In the aortic arch stent-graft type blood vessel of the present invention, the aortic stent vessel is in a pre-curved shape in a natural state, and the pre-curvature of the aortic stent vessel is less than the curvature of the aortic arch of a human body, ensuring that the aortic stent vessel is in the aortic arch. After being released, the rebound force of the two ends is relatively small, and the corresponding blood vessels will not be compressed to cause blood vessel rupture.

2. The aortic stent vessel of the present invention includes a proximal end section, a depression and a distal end section, and the depression is provided with a first step and a second step, and the proximal end section, the first step and the distal end section One inner chimney stent is respectively fixed inside, and the three inner chimney stents are staggered in the axial direction of the aortic stent vessel, which can prevent the two inner chimney stents at the proximal end from interfering with each other during compression, and make the aortic stent vessel easier to compress And put into the delivery system with a smaller diameter, the guide wire and the catheter are easier to select each inner chimney stent separately, which facilitates the delivery and release of branch arterial stents, and prevents multiple branch arterial stents from entering the same inner chimney stent.

3. The right side end face of the first step of the present invention is an inclined surface, and the opening two of the fixed inner chimney bracket two corresponds to an oblique cut structure, and the inclined surface forms an obtuse angle with the bottom wall of the recessed portion, so as to facilitate the delivery of the branch arterial stent.

Description of drawings

Fig. 1 is a front view of the aortic stent vessel of the present invention.

Fig. 2 is a schematic diagram of the aortic stent of the present invention stretched into a straight state.

Fig. 3 is a cross-sectional view along A-A direction in Fig. 2 .

Fig. 4 is a sectional view along B-B direction in Fig. 2 .

Fig. 5 is a schematic diagram of the structure of the stent-type blood vessel of the present invention after it is released in the thoracic aorta, and three branch vessels are branched into arteries.

Detailed ways

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The present invention discloses an improved aortic arch stent-graft type vessel, referring to FIG. 1 and FIG. 5 , which includes an aortic stent vessel 1 and three branch arterial stent vessels 2 . Wherein, the aortic stent vessel 1 is in a pre-curved shape, and the pre-curvature of the aortic stent vessel 1 is smaller than the curvature of the aortic arch of a human body. The aortic stent vessel 1 includes a proximal end section 10, a distal end section 30, and a recess 20 provided between the proximal end section 10 and the distal end section 30, and the middle and upper part of the right side wall of the proximal end section 10 is opened. There is a 100 of openings.

Referring to Figures 1 to 4, the above-mentioned recessed part 20 is provided with a first step 21 and a second step 22 in sequence from left to right, and the left side of the first step 21 is fixedly connected to the right side of the proximal end section 10 through a film one 211. In the lower part of the side wall, the right side of the first step 21 is provided with an opening 210, the left side of the second step 22 is connected under the opening 2 on the right side of the first step, and the right side is connected to the distal end section through the coating 221. The middle and lower parts of the left side wall of 30 are connected, and the middle and upper part of the left side wall of the distal end section 30 is provided with an opening three 300 . The first opening 100, the second opening 210 and the third opening 300 are respectively fixed with an inner chimney support 1 31, an inner chimney support 2 32 and an inner chimney support 3 33, wherein the inner chimney support 31 and the inner chimney support 33 are respectively along the The inner wall of the near-center end section 10 and the far-center end section 30 is sewed, and the inner chimney support 2 32 is sewed along the inner wall of the first step 21, and the left end of the inner chimney support 2 32 passes through the right end of the inner chimney support 1 31. The above-mentioned covering films are separated by 211. The three branch artery stent vessels 2 are separately packed in the first inner chimney support 31 , the second inner chimney support 32 and the third inner chimney support 33 .

Referring to Fig. 2 to Fig. 4, in order to facilitate the delivery of the branch arterial stent blood vessel 2, the right end of the above-mentioned inner chimney support 31 and the left end of the inner chimney support 3 33 protrude from the opening 100 and the opening 3 300 respectively. The protruding length is 3-5 mm.

Referring to Fig. 1 and Fig. 5, the first coating 211 and the second coating 221 are annular structures with a wide top and a narrow bottom, and the maximum length of the upper part of the first coating 211 and the second coating 221 is 5-12mm. The opening two 210 is tangent to the inner top surface of the first step 21 , and the top surface of the first step 21 is slightly higher than the curved surface corresponding to the bottom end of the opening one 100 . After the aortic stent vessel 1 is transported into the aortic arch and released, the two ends of the coating one are stretched to both sides by the elastic force, so that the top surface of the first step is the curved surface corresponding to the bottom end of the opening one 100 Smooth transition connections.

2 and 3, the right end surface of the first step 21 is an inclined surface, which forms an obtuse angle with the top surface of the second step 22, and the second opening 210 is opened on the inclined surface. Oblique incision on the top, so that the branch artery stent blood vessel 2 can be delivered into the inner chimney stent 2 32 .

With reference to Fig. 2, described aortic stent vessel 1 is made of tubular film one 11 and a plurality of ring-shaped corrugated support one 12 that are sutured at intervals in tubular film one 11, described inner chimney support one 31, inner chimney support two 32 and The three inner chimney brackets 33 all include a tubular membrane two 301 and a plurality of ring-shaped wave-shaped brackets two 302 sewn in the tubular membrane two 301 at intervals, and two adjacent ring-shaped wave-shaped brackets two 302 in each inner chimney bracket A ring-shaped wave-shaped support 1 12 is correspondingly provided on the outside of the outer side, and the sum of the widths of the two ring-shaped support 2 302 is equal to the width of the corresponding ring-shaped wave-shaped support 1 12 . The ring wave stent 1 12 and the ring wave stent 2 302 are made of medical stainless steel alloy rings with good biocompatibility, chemical stability and mechanical and physical properties, such as nickel-based alloy, cobalt-based alloy, 316 medical stainless steel, shape memory alloy or degradable or degradable polymer material; and the tubular membrane 231 is polytetrafluoroethylene membrane, polyester fiber membrane, polyamide membrane or polypropylene membrane.

Referring to Fig. 2, the top, bottom, front end and rear end of the outer circumference of the inner chimney support fixed at the opening 100 are respectively provided with an 8-shaped developing mark 13 protruding from the inside of the opening 100. The top, bottom, front end and rear end of the outer circumference of the front end of the chimney support 31 are also provided with a font development mark 13 respectively. The top, bottom, front and rear ends of the outer circumference of the inner chimney support 2 32 fixed at the opening 2 210 are respectively provided with an 8-shaped developing mark 13 . The top, bottom, front and rear ends of the outer circumference of the inner chimney support three 33 fixed at the opening three 300 are respectively provided with an 8-shaped developing mark 13 protruding from the front end of the inner chimney support three 33 of the opening three 300 The top, bottom, front and rear of the outer circumference of the head are also provided with an 8-shaped developing mark 13 respectively. The above-mentioned 8-shaped developing marks 13 are arranged obliquely along the axial direction of the aortic stent vessel 1 . The 8-shaped developing mark 13 is an inherent component of the stent itself, or a material with good biocompatibility and X-ray-opaque properties.

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any non-substantial changes made to the present invention by using this concept should be an act of violating the protection scope of the present invention.

Claims (10)

1. An improved aortic arch stent graft type blood vessel, comprising an aortic stent vessel and three branch arterial stent vessels, is characterized in that: the aortic stent vessel is a pre-curved shape, and the precurvature of the aortic stent vessel The curvature of the aortic arch is smaller than that of the human body. The aortic stent blood vessel includes a proximal end section, a distal end section, and a depression between the proximal end section and the distal end section. The depression runs from left to right A first step and a second step are provided in sequence, and the upper middle part of the right side wall of the proximal end section is provided with an opening 1, and the left side of the first step is fixedly connected to the proximal end section through the film 1. The middle and lower part of the right side wall, the right side of the first step is provided with an opening 2, the right side of the second step is connected with the middle and lower part of the left side wall of the distal end section through the coating 2, and the distal end The upper part of the left side wall of the section is provided with an opening three, and the opening one, the opening two and the opening three are respectively fixed with the inner chimney support one, the inner chimney support two and the inner chimney support three, and the inner chimney support one and the inner chimney support three. The chimney support three is sewed along the inner wall of the proximal end section and the far-center end section respectively, and the inner chimney support two is sewed along the inner wall of the first step, and the left end of the inner chimney support two and the inner chimney support The right end of one is separated by the covering film one, and the three branch arterial stents are separately packaged in the first inner chimney support, the second inner chimney support and the third inner chimney support. 2. An improved aortic arch covered stent-graft blood vessel according to claim 1, characterized in that: the first and second covering films are ring-shaped structures that are wide at the top and narrow at the bottom. 3. An improved aortic arch stent-graft type blood vessel as claimed in claim 2, characterized in that: the right end of the inner chimney stent one and the left end of the inner chimney stent three respectively protrude from the opening The protruding lengths of the openings 1 and 3 are both 3-5 mm. 4. An improved aortic arch covered stent-graft blood vessel according to claim 3, characterized in that: the maximum lengths of the upper parts of the first and second coverings are both 5-12 mm. 5. a kind of improved aortic arch stent-graft type blood vessel as claimed in claim 3, is characterized in that: the top, bottom end, front end and rear end of the inner chimney support one outer circumference that are fixed at one place of described opening are arranged respectively There is an 8-shaped development mark, and the top, bottom, front end and rear end of the outer circumference of the inner chimney support one front end that protrude from the opening 1 are also respectively provided with a font development mark. 6. A kind of improved aortic arch stent-graft type blood vessel as claimed in claim 3, it is characterized in that: the top, bottom, front end and rear end of the three outer circumferences of the inner chimney support fixed at three places of the opening are respectively arranged There is an 8-shaped development mark, and an 8-shaped development mark is also provided on the top, bottom, front end and rear end of the outer circumference of the front end of the inner chimney support three protruding from the opening three. 7. An improved aortic arch stent-graft type blood vessel according to claim 1, characterized in that: the second opening is tangent to the inner top surface of the first step, and the top surface of the first step is Slightly higher than the curved surface corresponding to the bottom end of the opening. 8. An improved aortic arch stent-graft type blood vessel according to claim 1, characterized in that: the right side end surface of the first step is an inclined surface, and the difference between the inclined surface and the top surface of the second step is An obtuse angle is formed between them, and the second opening is an oblique cut made on the inclined surface. 9. A kind of improved aortic arch stent-graft type blood vessel as claimed in claim 8, is characterized in that: the top, bottom, front end and rear end of the inner chimney support two outer circumferences fixed at two places of the opening are respectively arranged There is a figure 8 developed mark. 10. A kind of aortic arch stent-graft type blood vessel as claimed in claim 1, characterized in that: the aortic stent blood vessel is composed of tubular membrane 1 and a plurality of ring-shaped corrugated stents 1 sewn in the tubular membrane 1 at intervals, The inner chimney support 1, the inner chimney support 2 and the inner chimney support 3 all include a tubular film 2 and a plurality of ring-shaped corrugated support 2 sewn in the tubular film 2 at intervals, and the adjacent chimney supports in each inner chimney support A ring-shaped wave-shaped support 1 is correspondingly provided on the outside of the two ring-shaped wave-shaped supports 2, and the sum of the widths of the two ring-shaped wave-shaped supports 2 is equal to the width of the corresponding ring-shaped wave-shaped support 1.