CN118267201B - A stable anti-displacement heart stent - Google Patents
A stable anti-displacement heart stent Download PDFInfo
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- CN118267201B CN118267201B CN202410304892.8A CN202410304892A CN118267201B CN 118267201 B CN118267201 B CN 118267201B CN 202410304892 A CN202410304892 A CN 202410304892A CN 118267201 B CN118267201 B CN 118267201B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 38
- 230000000670 limiting effect Effects 0.000 claims description 37
- 230000007246 mechanism Effects 0.000 claims description 34
- 238000000926 separation method Methods 0.000 claims description 19
- 230000008602 contraction Effects 0.000 claims description 12
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 239000008280 blood Substances 0.000 claims description 4
- 210000004369 blood Anatomy 0.000 claims description 4
- 230000003313 weakening effect Effects 0.000 claims description 2
- 230000000747 cardiac effect Effects 0.000 claims 6
- 210000004351 coronary vessel Anatomy 0.000 abstract description 16
- 238000011982 device technology Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 239000003814 drug Substances 0.000 description 5
- 229940079593 drug Drugs 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000003902 lesion Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Prostheses (AREA)
Abstract
本发明涉及医疗器械技术领域，尤其涉及一种稳定型防移位的心脏支架。包括有均匀分布的多组椭圆环，多组所述椭圆环均位于同一中心线上，每组所述椭圆环包含周向等距分布的三个，在所述中心线的方向上相邻两个所述椭圆环之间固接有螺旋杆，所述螺旋杆和所述椭圆环在所述中心线的方向上呈交错分布，位于所述中心线两端且相邻的所述椭圆环之间固接有第一弧形杆，全部的所述椭圆环、所述螺旋杆和所述第一弧形杆配合形成圆柱支架。本发明通过椭圆环的三角形分布，提高本装置中心脏支架的结构稳定性，通过交错分布的椭圆环，进一步提升扩张后圆柱支架与冠状动脉之间的稳定性，同时提高圆柱支架的防位移性。
The present invention relates to the field of medical device technology, and in particular to a stable anti-displacement heart stent. It includes multiple groups of evenly distributed elliptical rings, all of which are located on the same center line, and each group of elliptical rings includes three circumferentially equidistantly distributed elliptical rings, a spiral rod is fixed between two adjacent elliptical rings in the direction of the center line, the spiral rod and the elliptical ring are staggered in the direction of the center line, a first arc rod is fixed between the elliptical rings located at both ends of the center line and adjacent to each other, and all of the elliptical rings, the spiral rod and the first arc rod cooperate to form a cylindrical stent. The present invention improves the structural stability of the heart stent in the device through the triangular distribution of the elliptical rings, and further improves the stability between the cylindrical stent and the coronary artery after expansion through the staggered distribution of the elliptical rings, while improving the anti-displacement property of the cylindrical stent.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a stable anti-displacement heart stent.
Background
The heart stent is a medical instrument for supporting coronary arteries, so that normal circulation of blood in the coronary arteries is guaranteed, implantation of the heart stent is an effective means for treating coronary heart diseases, the existing heart stent is often a medical instrument formed by combining the stent and a conveying mechanism, in the using process of the heart stent, the existing conveying mechanism on the commonly used heart stent conveys the stent to a designated part of the coronary arteries, and then the stent is expanded to support the coronary arteries, but the stent is extremely easy to deform at a connecting part in the expanding process of the stent due to the basically consistent thickness degree of the stent, the deformation degree of the connecting part of the stent is difficult to control, the deformation is uneven, and the supporting effect of the stent on the coronary arteries is influenced, so that the treatment effect of the heart stent is poor.
In view of this, the invention discloses a stable displacement-preventing heart stent.
Disclosure of Invention
In order to overcome the problems mentioned in the background art, the invention provides a stable anti-displacement heart stent.
The technical scheme is that the stable anti-displacement heart support comprises a plurality of groups of elliptical rings which are uniformly distributed, wherein the elliptical rings are all positioned on the same central line, each group of elliptical rings comprises three elliptical rings which are circumferentially and equidistantly distributed, a spiral rod is fixedly connected between two adjacent elliptical rings in the direction of the central line, the spiral rods and the elliptical rings are staggered in the direction of the central line, first arc-shaped rods are fixedly connected between the adjacent elliptical rings and positioned at two ends of the central line, all the elliptical rings, the spiral rods and the first arc-shaped rods are matched to form a cylindrical support, and a conveying mechanism is arranged on the cylindrical support and used for extruding the cylindrical support to expand.
Preferably, two adjacent groups of elliptical rings are distributed in a staggered manner, so that the outer side wall of the cylindrical support is wavy in the direction of the central line.
Preferably, each set of the opposite sides of the elliptical ring is provided with inclined surfaces for reducing the obstruction of the blood by the respective elliptical ring, and each set of the opposite sides of the elliptical ring is provided with evenly distributed grooves.
Preferably, the screw rod is provided with a fusiform hole for adapting to deformation of the screw rod, and two ends of the fusiform hole are round and are used for improving strength of the screw rod.
Preferably, the conveying mechanism comprises a pushing tube, the pushing tube is arranged in the middle of the cylindrical support, an air duct is fixedly connected in the pushing tube, guide wires are slidably arranged in the middle of the air duct, evenly distributed partition plates are arranged on the outer side faces of the pushing tube, through holes distributed at equal intervals in the circumferential direction are formed in the partition plates, air bags are fixedly connected on the outer side faces of the pushing tube, the air bags are sleeved on the outer sides of the partition plates, the air bags are adhered to the partition plates, the outer sides of the air bags are attached to the cylindrical support, round holes distributed at equal intervals in the circumferential direction are formed in the side walls of the pushing tube and the side walls of the air duct, the round holes on the air duct are communicated with the round holes adjacent to the pushing tube, and the round holes of the pushing tube are located in the middle of the air bags.
Preferably, the device further comprises an auxiliary deformation mechanism for controlling each group of elliptical rings to expand correspondingly, the auxiliary deformation mechanism is arranged on the cylindrical support and comprises a plurality of groups of second arc-shaped rods which are uniformly distributed, each group of second arc-shaped rods comprises six groups which are uniformly distributed in the circumferential direction, the plurality of groups of second arc-shaped rods are respectively arranged on the adjacent single groups of elliptical rings, the second arc-shaped rods are fixedly connected with the corresponding elliptical rings, the adjacent two groups of second arc-shaped rods are respectively arranged on the two groups of elliptical rings which are spaced apart, limiting rods are fixedly connected between the adjacent second arc-shaped rods and are positioned in the same group, connecting rods are fixedly connected at two ends of each limiting rod in the direction of the central line, each connecting rod is fixedly connected with the adjacent elliptical rings, a plurality of groups of limiting assemblies which are uniformly distributed are arranged between the two groups of elliptical rings and are positioned between the two groups of the second arc-shaped rods, and each group of limiting assemblies is used for limiting the elliptical rings after expansion.
Preferably, the cross section of the second arc-shaped rod gradually becomes smaller from two ends to the middle part, and the limiting rod and the adjacent two second arc-shaped rods are matched to form a Z shape.
Preferably, the elliptical ring has a longer axial end thickness greater than a shorter axial end thickness thereof for reducing deformation thereof in the direction of the center line.
Preferably, the limiting component comprises three first fixing plates distributed at equal intervals in the circumferential direction, the three first fixing plates are fixedly connected to adjacent elliptical rings respectively, a second fixing rod is fixedly connected to the elliptical rings close to the first fixing plates in the center line direction, the first fixing plates are provided with arc hooks, and the second fixing rods are provided with grooves matched with the arc hooks on the adjacent first fixing plates.
Preferably, the air bag is further provided with a contraction mechanism used for contracting the air bag in the direction of the central line, the contraction mechanism is arranged on the air duct, the separation plates are in sliding connection with the pushing pipe, the contraction mechanism comprises rubber rings which are symmetrically distributed and equidistantly distributed, the rubber rings which are symmetrically distributed and equidistantly distributed are fixedly connected to the adjacent separation plates respectively, a separation membrane is fixedly connected to part of through holes of the separation plates, a sliding frame is arranged in the other through holes of the separation plates in a sliding mode, an elastic piece is arranged between the sliding frame and the adjacent separation plates, the sliding frame is provided with a cylindrical rod matched with the adjacent separation membrane, elastic strips which are circumferentially equidistantly distributed are fixedly connected between the adjacent separation plates, the elastic strips are fixedly connected with the air bag, and the elastic coefficient of the elastic strips is larger than that of the air bag.
Compared with the prior art, the device has the technical effects that the stability of the cylindrical support formed by all elliptical rings, the spiral rods and the first arc rods is improved through the triangular distribution of the elliptical rings, the outer side of the cylindrical support is provided with wavy lines through the elliptical rings distributed in a staggered mode, the stability between the cylindrical support and coronary arteries after expansion is further improved, the displacement resistance of the cylindrical support is improved, the flexibility of the spiral rods is improved through the fusiform holes, the deformation between the spiral rods and the adjacent elliptical rings is weakened, the strength of the cylindrical support is guaranteed, the adjacent elliptical rings after expansion are uniformly contracted through the connection effect of the second arc rods, the limiting rods and the connecting rods in the auxiliary deformation mechanism, the service stability and the self strength of the device are further improved, the locking cooperation of the first fixing plate and the second fixing rods of the limiting assembly is further improved, the limiting effect of the elastic strips and the separating films in the contraction mechanism is used for assisting the movement of the separating plates, and the synchronous contraction of all the elliptical rings and the spiral rods is further guaranteed, and the stability of the device is improved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic plan view of the invention after being unfolded;
FIG. 3 is a schematic perspective view of an elliptical ring and screw rod of the present invention;
FIG. 4 is a cross-sectional view of a component part at an elliptical ring of the present invention;
FIG. 5 is a cross-sectional view of the conveyor mechanism of the present invention;
FIG. 6 is a schematic perspective view of an auxiliary deformation mechanism according to the present invention;
Fig. 7 is a cross-sectional view of the retraction mechanism of the present invention.
The reference numerals comprise a 1-elliptical ring, a 2-spiral rod, a 21-first arc-shaped rod, a 3-inclined surface, a 4-fusiform hole, a 5-pushing tube, a 51-air duct, a 52-guide wire, a 53-separation plate, a 54-air bag, a 6-second arc-shaped rod, a 61-limit rod, a 62-connecting rod, a 7-first fixing plate, a 71-second fixing rod, an 8-rubber ring, a 81-separation membrane, a 82-sliding frame and a 83-elastic strip.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting of the present invention.
An embodiment 1 is a stable anti-displacement heart support, as shown in figures 1-4, the heart support comprises a plurality of groups of uniformly distributed elliptical rings 1, the plurality of groups of elliptical rings 1 are all located on the same central line, each group of elliptical rings 1 comprises three circumferentially equidistant distributed elliptical rings, the three elliptical rings form a triangular structure, the structural stability of the heart support is improved, a spiral rod 2 is fixedly connected between two adjacent elliptical rings 1 in the horizontal direction, the spiral rods 2 are staggered to form a staggered grid, the spiral rods 2 and the elliptical rings 1 are staggered in the horizontal direction, a first arc-shaped rod 21 which is circumferentially equidistant in the vertical direction is fixedly connected between each group of elliptical rings 1 at the left end and the right end, all the elliptical rings 1, the spiral rods 2 and the first arc-shaped rod 21 are matched to form a cylindrical support, the outer side walls of the cylindrical support are staggered in the horizontal direction, the firmness between the cylindrical support and a coronary artery is improved after the cylindrical support is expanded, inclined surfaces 3 are respectively arranged on opposite sides of each group of the elliptical rings 1, the inclined surfaces 3 are used for reducing corresponding obstruction of the rings 1 to the blood, simultaneously, the cylindrical support is further pressed by the spiral rings 1 and is provided with cylindrical supports 2 which are arranged at two ends, the cylindrical supports 2 are uniformly distributed in the opposite directions, the cylindrical support is used for storing the cylindrical support is deformed, and the cylindrical support is further is provided with cylindrical, and the cylindrical support is provided with cylindrical holes 4, and the cylindrical support is used for storing medicine is arranged.
As shown in fig. 1 and 5 and fig. 7, the conveying mechanism comprises a pushing tube 5, the pushing tube 5 is arranged in the middle of the cylindrical support, an air duct 51 is fixedly connected in the pushing tube 5, the air duct 51 is connected with an existing inflating mechanism, a guide wire 52 is slidably arranged in the middle of the air duct 51, the guide wire 52 is used for guiding the pushing tube 5 to a designated position, eight partition plates 53 which are uniformly distributed are arranged on the outer side surface of the pushing tube 5, through holes which are uniformly distributed in the circumferential direction are formed in the side wall of the partition plates 53, an air bag 54 which is adhered with the partition plates 53 is fixedly connected on the outer side surface of the pushing tube 5, round holes which are uniformly distributed in the circumferential direction are formed in the side wall of the pushing tube 5 and the side wall of the air duct 51 are respectively attached to the cylindrical support, round holes on the air duct 51 are communicated with round holes on the adjacent pushing tube 5, the round holes of the pushing tube 5 are located in the middle of the air bag 54, and along with continuous injection of air into the air duct 51, the air enters the middle of the air bag 54 gradually through flowing, and is subsequently limited by the partition plates 53, so that the air bag 54 is gradually expands from the middle to two ends.
In the invention, the cylindrical support consisting of all elliptical rings 1, the spiral rods 2 and the first arc-shaped rods 21 is of an integrated structure, the cylindrical support is engraved by the existing laser cutting machine in an integrated mode, the cylindrical support is sleeved on the outer side of the air bag 54 after manufacturing is completed, and meanwhile, due to the fact that the evenly distributed grooves are formed in the outer side faces of all elliptical rings 1, medicines can be conveniently and evenly smeared on the outer side faces of all elliptical rings 1 in a follow-up mode, medicines are stored in the grooves of all elliptical rings 1, the medicines can be conveniently retained at lesion positions of coronary arteries for a long time, and the efficacy of the medicines is prolonged.
When the device is used, the propelling tube 5 drives the cylindrical support to move to a designated position through the guiding action of the guide wire 52, then the air is filled into the air guide tube 51 by using the existing air charging mechanism, and enters the air bag 54 through the round hole of the air guide tube 51 and the round hole of the propelling tube 5, wherein the air entering the air bag 54 is slowly expanded from the middle part to the two ends by the limiting action of the partition plate 53 through the round hole on the partition plate 53, the air bag 54 expands and extrudes the cylindrical support, the cylindrical support is extruded and expanded, and the expanded cylindrical support is tightly attached to the lesion of the coronary artery.
In the process of expanding all elliptical rings 1, two adjacent elliptical rings 1 pull the spiral rod 2 to bend, wherein, due to the fact that the fusiform holes 4 are formed in the spiral rod 2, the thickness of the side wall of the middle part of the spiral rod 2 is thinner than the joint between two ends of the spiral rod 2 and the adjacent elliptical rings 1, the middle part of the spiral rod 2 is convenient to deform when being bent, the stability of the expanded cylindrical stent is improved by keeping the grid formed by all elliptical rings 1 and the spiral rod 2, meanwhile, due to the fact that all elliptical rings 1 and the spiral rod 2 are distributed in a staggered mode, the outer side of the formed cylindrical stent is in a wavy line, the expanded cylindrical stent is in wavy contact with a coronary artery, the firmness between the cylindrical stent and the coronary artery is greatly improved through multiple limiting fixation of wave crests, and displacement of the cylindrical stent in the coronary artery is avoided.
After the installation, the airbag 54 is contracted and reset by the existing inflation mechanism, and then the parts connected with the propulsion tube 5 and the like are taken out.
Example 2: on the basis of the embodiment 1, as shown in fig. 2 and 6, the device further comprises an auxiliary deformation mechanism, the auxiliary deformation mechanism is arranged on the cylindrical support, the auxiliary deformation mechanism is used for controlling each group of elliptical rings 1 to correspondingly expand, the auxiliary deformation mechanism comprises a plurality of groups of second arc-shaped rods 6 which are uniformly distributed, each group of second arc-shaped rods 6 comprises six groups which are circumferentially and equidistantly distributed, the plurality of groups of second arc-shaped rods 6 are respectively arranged on the adjacent single groups of elliptical rings 1, the second arc-shaped rods 6 are fixedly connected with the corresponding elliptical rings 1, the adjacent two groups of second arc-shaped rods 6 are respectively arranged on the two groups of elliptical rings 1 which are spaced apart, a limiting rod 61 is fixedly connected between the adjacent second arc-shaped rods 6 in the vertical direction, the two ends of the limiting rod 61 in the horizontal direction are fixedly connected with connecting rods 62, the connecting rod 62 is fixedly connected with the adjacent elliptical rings 1, the cross section of the second arc-shaped rods 6 is gradually reduced from two ends to the middle part, the limiting rods 61 and the adjacent two second arc-shaped rods 6 are matched to form a Z shape, when the elliptical rings 1 expand in the vertical direction through the shape of the second arc-shaped rods 6, the elliptical rings 1 in the horizontal direction shrink correspondingly under the limiting action of the limiting rods 61 and the second arc-shaped rods 6, the structural stability of the expanded cylindrical support is improved, the elliptical rings 1 are provided with a plurality of groups of uniformly distributed limiting assemblies, the limiting assemblies are positioned between the two groups of elliptical rings 1 connected with the second arc-shaped rods 6, each group of limiting assemblies is used for limiting the expanded elliptical rings 1, and the thickness of the long shaft ends of the elliptical rings 1 is larger than that of the short shaft ends of the elliptical rings 1 and is used for weakening deformation of the elliptical rings in the horizontal direction.
As shown in fig. 2 and 6, the limiting component comprises three first fixing plates 7 distributed circumferentially at equal intervals, the three first fixing plates 7 are fixedly connected to the adjacent elliptical rings 1 respectively, the elliptical rings 1 close to the first fixing plates 7 in the horizontal direction are fixedly connected with second fixing rods 71, the first fixing plates 7 are provided with two arc hooks distributed symmetrically, the second fixing rods 71 are provided with two grooves distributed symmetrically, the grooves of the second fixing rods 71 are matched with the arc hooks on the adjacent first fixing plates 7, when the elliptical rings 1 shrink and move in the horizontal direction, the second fixing rods 71 are matched with the adjacent first fixing plates 7 to limit the moved elliptical rings 1, so that the expanded elliptical rings 1 keep corresponding states, and the stability of the device is further improved.
In the process of installing the cylindrical support, as the air bag 54 expands, the air bag 54 extrudes all the elliptical rings 1 to expand, wherein the elliptical rings 1 are expanded to pull the adjacent limiting rods 61 through the adjacent second arc-shaped rods 6, wherein the cross section of each limiting rod 61 is gradually enlarged from the middle to the two ends, and is larger than that of each second arc-shaped rod 6, the middle of each second arc-shaped rod 6 is correspondingly bent in the moving process, meanwhile, the adjacent two second arc-shaped rods 6 pull the adjacent limiting rods 61 to rotate, and the limiting rods 61 rotate to pull the adjacent two elliptical rings 1 to move through the adjacent connecting rods 62.
Because the thickness of the cross section of the long axis end of the elliptical ring 1 is larger than that of the short axis end of the elliptical ring, deformation of the elliptical ring 1 in the horizontal direction is weakened, in the rotation process of the limiting rod 61, the limiting rod 61 pulls two adjacent elliptical rings 1 to be close together through the adjacent connecting rod 62, namely the elliptical rings 1 in the horizontal direction are close together, in the process, the elliptical rings 1 respectively connected with the first fixing plate 7 and the second fixing rod 71 are moved to be close together, the first fixing plate 7 and the adjacent second fixing rod 71 are close together, at the moment, the second fixing rod 71 moves to deform an arc-shaped hook for extruding the adjacent first fixing plate 7 until the second fixing rod 71 is completely inserted into the adjacent first fixing plate 7, locking of the second fixing rod 71 and the adjacent first fixing plate 7 is completed, limiting locking is carried out on the expanded elliptical ring 1, stability of the expanded elliptical ring 1 is further improved, the elliptical ring 1 is always tightly attached to the coronary artery, and reliability and use stability of the device are improved.
Example 3: on the basis of embodiment 2, as shown in fig. 5 and 7, the device further comprises a contraction mechanism, the contraction mechanism is arranged on the air duct 51, the partition plate 53 is slidably connected with the pushing tube 5, the contraction mechanism is used for contracting the air bag 54 in the direction of the central line, the contraction mechanism comprises eight symmetrical and equidistant rubber rings 8, the eight rubber rings 8 are fixedly connected to the adjacent partition plates 53 respectively, wherein the four rubber rings 8 on the left side are respectively positioned on the left side of the four partition plates 53 on the left side, the four rubber rings 8 on the right side are respectively positioned on the right side of the four partition plates 53 on the right side, a partition film 81 is fixedly connected to part of through holes of the partition plates 53, sliding frames 82 are slidably arranged in the rest through holes of the partition plates 53 together, the four sliding frames 82 on the left side are respectively positioned on the left side of the four partition plates 53 on the left side, four carriage 82 on the right are located the right side of four division board 53 on the right side respectively, install the elastic component between carriage 82 and the adjacent division board 53, the elastic component sets up to the spring leaf, carriage 82 is provided with evenly distributed's cylinder pole, the cylinder pole of carriage 82 cooperates with adjacent separation membrane 81, four elastic strips 83 that circumference equidistance was distributed are fixedly connected between two adjacent division boards 53, elastic strip 83 and gasbag 54 rigid coupling, the elastic coefficient of elastic strip 83 is greater than the elastic coefficient of gasbag 54, spacing through elastic strip 83, make gasbag 54 shrink the removal in the horizontal direction in the inflation process, elliptical ring 1 and hob 2 carry out corresponding shrink on the auxiliary gasbag 54 outside, control elliptical ring 1 and hob 2 constitute the even deformation of cylinder support, keep the stability of cylinder support structure.
After gas is injected into the gas guide tube 51 through the gas charging mechanism, the gas enters the gas bag 54 and the adjacent two partition plates 53 through the round holes on the gas guide tube 51 and the round holes on the pushing tube 5, wherein in an initial state, under the shielding effect of the partition film 81, the gas fills the gas bag 54 area connected with the middle two partition plates 53, the gas bag 54 in the area expands and presses the middle elliptical ring 1 and the screw rod 2 to expand outwards, then the pressure between the middle two partition plates 53 is increased, and the separation of the middle left and right symmetrical partition plates 53 is avoided under the limiting effect of the rubber ring 8 on the partition plates 53.
The air bag 54 between the two middle partition plates 53 deforms and drives the elastic strips 83 to deform together in the expansion process, wherein the elastic coefficient of the elastic strips 83 is larger than that of the air bag 54, and at the moment, the air bag 54 in a designated area pulls the two adjacent partition plates 53 to be close through the elastic strips 83 in the expansion process, namely the air bag 54 contracts in the horizontal direction, so that the deformation expansion of the middle elliptical ring 1 and the screw rod 2 is further assisted.
Simultaneously, after the gas pressure in the two partition plates 53 at the middle part is gradually increased, the gas pressure moves by extruding the adjacent sliding frame 82, the sliding frame 82 moves to extrude the adjacent elastic piece, the cylindrical rod on the sliding frame 82 is poked to the adjacent partition film 81 in the moving process, after the cylindrical rod on the sliding frame 82 is poked to the adjacent partition film 81, the gas moves to the cavity at the outer side of the two partition plates through the through holes on the adjacent partition plates 53, at the moment, the pressure in the air bag 54 is instantaneously weakened, so that the middle part of the air bag weakens the extrusion of the elliptical ring 1 and the spiral rod 2, and meanwhile, the middle part of the air bag 54 weakens the blocking of coronary artery blood vessels, and the dredging of the coronary artery is kept.
Along with the gas entering the four partition plate 53 areas in the middle of the air bag 54, the air bag 54 in the area corresponding to the four partition plates 53 in the middle is inflated again, and the operation is repeated, so that the middle of all the elliptical rings 1 and the screw rods 2 are intermittently inflated and extruded to the left and right ends, and meanwhile, the corresponding partition plates 53 correspondingly move to assist the elliptical rings 1 and the screw rods 2 to expand uniformly, and the stability of the elliptical rings 1 and the screw rods 2 after expanding is ensured.
It should be noted that the foregoing description of the preferred embodiments is merely illustrative of the technical concept and features of the present invention, and is not intended to limit the scope of the invention, as long as the scope of the invention is defined by the claims and their equivalents. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (8)
1. The stable anti-displacement heart stent is characterized by comprising a plurality of groups of uniformly distributed elliptical rings (1), wherein the elliptical rings (1) are all positioned on the same central line, each group of elliptical rings (1) comprises three circumferentially equidistant distributed elliptical rings, a screw rod (2) is fixedly connected between two adjacent elliptical rings (1) in the direction of the central line, the screw rods (2) and the elliptical rings (1) are in staggered distribution in the direction of the central line, a first arc-shaped rod (21) is fixedly connected between the elliptical rings (1) which are positioned at two ends of the central line and are adjacent, all the elliptical rings (1), the screw rods (2) and the first arc-shaped rods (21) are matched to form a cylindrical stent, and a conveying mechanism is arranged on the cylindrical stent and is used for extruding the cylindrical stent to expand;
The conveying mechanism comprises a pushing pipe (5), the pushing pipe (5) is arranged in the middle of the cylindrical support, an air duct (51) is fixedly connected in the pushing pipe (5), guide wires (52) are slidably arranged in the middle of the air duct (51), evenly distributed partition plates (53) are arranged on the outer side faces of the pushing pipe (5), through holes distributed at equal intervals in the circumferential direction are formed in the partition plates (53), an air bag (54) is fixedly connected on the outer side faces of the pushing pipe (5), the air bag (54) is sleeved on the outer side of the partition plates (53), the air bag (54) is adhered to the partition plates (53), round holes distributed at equal intervals in the circumferential direction are formed in the side walls of the pushing pipe (5) and the side walls of the air duct (51), the round holes on the air duct (51) are communicated with the round holes adjacent to the pushing pipe (5), and the round holes of the pushing pipe (5) are located in the middle of the air bag (54).
The air bag is characterized by further comprising a contraction mechanism used for contracting the air bag (54) in the direction of the central line, the contraction mechanism is arranged on the air duct (51), the separation plate (53) is connected with the pushing tube (5) in a sliding mode, the contraction mechanism comprises rubber rings (8) which are symmetrically distributed and equidistantly distributed, the rubber rings (8) which are symmetrically distributed and equidistantly distributed are fixedly connected to the adjacent separation plates (53) respectively, separation films (81) are fixedly connected to part of through holes of the separation plates (53), sliding frames (82) are arranged in the other through holes of the separation plates (53) in a sliding mode, elastic pieces are arranged between the sliding frames (82) and the adjacent separation plates (53), elastic strips (83) which are circumferentially equidistantly distributed are fixedly connected between the adjacent separation plates (53), and the elastic coefficients of the elastic strips (83) are larger than those of the air bag (54).
2. A stable displacement-preventing cardiac stent according to claim 1, characterized in that adjacent two groups of elliptical rings (1) are staggered so that the outer side wall of the cylindrical stent is waved in the direction of the central line.
3. A stable displacement-preventing cardiac stent according to claim 1, characterized in that the opposite sides of each set of elliptical rings (1) are provided with inclined surfaces (3), the inclined surfaces (3) being adapted to reduce the obstruction of the blood by the respective elliptical ring (1), the opposite sides of each set of elliptical rings (1) being provided with evenly distributed grooves.
4. A stable displacement-preventing cardiac stent according to claim 1, characterized in that the screw rod (2) is provided with a shuttle-shaped hole (4) for adapting to the deformation of the screw rod (2), both ends of the shuttle-shaped hole (4) being rounded for improving the strength of the screw rod (2).
5. The heart support of claim 1, further comprising an auxiliary deformation mechanism for controlling each group of elliptical rings (1) to correspondingly expand, wherein the auxiliary deformation mechanism is arranged on the cylindrical support and comprises a plurality of groups of second arc rods (6) which are uniformly distributed, each group of second arc rods (6) comprises six connecting rods (62) which are circumferentially and equidistantly distributed, the plurality of groups of second arc rods (6) are respectively arranged on the adjacent single groups of elliptical rings (1), the second arc rods (6) are respectively fixedly connected with the corresponding elliptical rings (1), the adjacent two groups of second arc rods (6) are respectively arranged on the two groups of elliptical rings (1) which are spaced apart, limiting rods (61) are fixedly connected between the second arc rods (6) which are positioned in the same group and are adjacent, connecting rods (62) are fixedly connected with two ends of the limiting rods (61) in the direction of the center line, the connecting rods (62) are respectively arranged on the adjacent single groups of elliptical rings (1), and the limiting assemblies are uniformly arranged between the two groups of elliptical rings (1), and the limiting assemblies are fixedly connected with the limiting assemblies (1).
6. A stable displacement-preventing cardiac stent according to claim 5, wherein the second arc-shaped rod (6) is gradually reduced in cross section from both ends to the middle, and the limit rod (61) and the adjacent two second arc-shaped rods (6) are matched in a zigzag shape.
7. A stable displacement-preventing cardiac stent according to claim 5, characterized in that the thickness of the long axis end of the elliptical ring (1) is greater than the thickness of the short axis end thereof for weakening the deformation thereof in the direction of the center line.
8. The stable displacement-preventing cardiac support according to claim 5, wherein the limiting assembly comprises three first fixing plates (7) circumferentially equidistantly distributed, the three first fixing plates (7) are fixedly connected to adjacent elliptical rings (1) respectively, a second fixing rod (71) is fixedly connected to the elliptical rings (1) which are close to the first fixing plates (7) in the direction of the central line, the first fixing plates (7) are provided with arc hooks, and the second fixing rods (71) are provided with grooves matched with the arc hooks on the adjacent first fixing plates (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410304892.8A CN118267201B (en) | 2024-03-18 | 2024-03-18 | A stable anti-displacement heart stent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410304892.8A CN118267201B (en) | 2024-03-18 | 2024-03-18 | A stable anti-displacement heart stent |
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| CN118267201A CN118267201A (en) | 2024-07-02 |
| CN118267201B true CN118267201B (en) | 2025-01-28 |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69835634T3 (en) * | 1997-05-07 | 2010-09-23 | Cordis Corp. | Intravascular stent and insertion system (obstruction of the ostium of a vessel) |
| DE60209583T2 (en) * | 2001-03-30 | 2006-12-21 | Terumo K.K. | stent |
| JP2005066202A (en) * | 2003-08-27 | 2005-03-17 | Nipro Corp | Flexible stent with excellent blood vessel follow-up capacity and expansibility |
| CN1745727A (en) * | 2004-09-08 | 2006-03-15 | 王蓉珍 | Intercurrent artificial heart valve, its implanting and recovering device |
| US9254211B2 (en) * | 2005-10-06 | 2016-02-09 | Cordis Corporation | Stent delivery system using a steerable guide wire |
| US8858615B2 (en) * | 2010-05-19 | 2014-10-14 | National Taiwan University | Preventing vascular stenosis of cardiovascular stent |
| DK3539509T3 (en) * | 2015-06-01 | 2021-10-11 | Edwards Lifesciences Corp | Heart valve repair devices configured for percutaneous administration |
| CN204863569U (en) * | 2015-06-26 | 2015-12-16 | 肖坤 | Heart support |
| DE102016106575A1 (en) * | 2016-04-11 | 2017-10-12 | Biotronik Ag | Heart valve prosthesis |
| CN114364341A (en) * | 2019-09-27 | 2022-04-15 | 爱德华兹生命科学公司 | Improved prosthetic heart valve stent |
| JP2024531604A (en) * | 2021-09-08 | 2024-08-29 | ボストン サイエンティフィック サイムド，インコーポレイテッド | Balloon expandable delivery system with actuated valve retention |
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