CN115192256A - Valve prosthesis convenient for capturing valve leaflets - Google Patents
Valve prosthesis convenient for capturing valve leaflets Download PDFInfo
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- CN115192256A CN115192256A CN202210729612.9A CN202210729612A CN115192256A CN 115192256 A CN115192256 A CN 115192256A CN 202210729612 A CN202210729612 A CN 202210729612A CN 115192256 A CN115192256 A CN 115192256A
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- positioning
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- valve prosthesis
- expandable stent
- positioning part
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- 238000004873 anchoring Methods 0.000 claims abstract description 8
- 238000002513 implantation Methods 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 7
- 210000001765 aortic valve Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 210000004204 blood vessel Anatomy 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 210000003484 anatomy Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
- 206010002906 aortic stenosis Diseases 0.000 description 1
- 201000002064 aortic valve insufficiency Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000003709 heart valve Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000004115 mitral valve Anatomy 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 210000005077 saccule Anatomy 0.000 description 1
Images
Classifications
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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
- A61F2/02—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
- A61F2/2412—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 with soft flexible valve members, e.g. tissue valves shaped like natural valves
-
- 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
- A61F2/2412—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 with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2418—Scaffolds therefor, e.g. support stents
-
- 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
- A61F2/2427—Devices for manipulating or deploying heart valves during implantation
- A61F2/2436—Deployment by retracting a sheath
-
- 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
- A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
-
- 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
- A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
- A61F2/2466—Delivery devices therefor
Abstract
The application relates to the field of medical equipment, in particular to a valve prosthesis convenient for capturing valve leaflets, which comprises an expandable stent for supporting and anchoring, a positioning part for positioning and clamping autologous valve leaflets and a conveying system for conveying the valve prosthesis, wherein the expandable stent is provided with an inflow end and an outflow end, the positioning part comprises a connecting part arranged at a far end and a positioning part arranged at a near end, the expandable stent is provided with a plurality of connecting structures at the outflow end, supporting rods are arranged on the connecting structures, one ends of the supporting rods are connected with the connecting part of the positioning part, and the other ends of the supporting rods are connected with the connecting structures; when the valve prosthesis reaches the target position, the positioning part of the positioning part extends out of the conveying system, and the two ends of the expandable stent are limited by the conveying system, so that the proximal end of the strut is supported towards the outer side of the expandable stent relative to the distal end of the strut, and the positioning part of the positioning part is driven to be supported towards the outer side of the expandable stent.
Description
Technical Field
The application relates to the field of medical equipment, in particular to a valve prosthesis convenient for capturing valve leaflets.
Background
Currently, aortic valve stents mainly include mechanically expandable stents, balloon expandable stents and self-expanding stents. The valve has small open area after the mechanical expansion stent and the saccule expansion stent are released, accurate positioning cannot be carried out, and the cross-valve pressure difference is large. Although the cross-valve pressure difference is small and the conduction resistance is small after the self-expandable stent is released, the coaxiality is poor after the self-expandable stent is released, accurate positioning cannot be carried out, and the problems of valve perivalvular leakage, valve slippage and the like are easily caused. At present, most aortic valve stents are designed for aortic stenosis patients, and for aortic insufficiency patients, how to improve the function of the self-body valve leaflet while preventing backflow and reduce the implantation amount of the implant, and meanwhile, the problems of ensuring the reliable anchoring of the implanted prosthesis in the intracardiac position and avoiding falling off and the like are all problems to be solved urgently in the field.
Patent CN201610009313.2 discloses an atrioventricular valve stent for puncture implantation and a delivery system thereof, relating to a prosthesis which can be implanted in vivo, in particular to a cardiac valve stent and an implantation surgical instrument thereof, comprising an expandable outer stent, a valve and a plurality of fixed arms, wherein the inverted hook part of the fixed arm and the fixed arms form a seesaw-like lever; the traction wire pulls the inverted hook part to drive the fixing arm to extend and hook the valve leaves of the mitral valve, so that the valve stent is fixed on the atrioventricular valve; an inter-valve backflow prevention edge corresponding to the valve leaflet interface covers the gap of the interface to prevent valve circumference backflow. The conveying system comprises an outer sheath tube, an inner core and a pushing rod, wherein the head end of the inner core is connected with the head end sheath tube; the front end of the valve stent is compressed in the head end sheath, and the rear end of the valve stent is compressed in the sheath; the pushing rod pushes the valve stent out of the outer sheath in a multi-stage segmented mode and releases the valve stent; the anti-backflow edge between the pulling line and the matched valve connected with the valve stent is placed, adjusted or recovered, the operation is convenient and safe, the success rate is high, and the valve periphery leakage can be effectively prevented. In this patent scheme, the fixed arm is connected with the support and forms "fulcrum", and the rear end of fixed arm forms barb portion, and barb portion has preset certain angle with the other end of fixed arm, and when valve prosthesis got into intracardiac centre gripping autologous leaflet, utilizes the conveying sheath pipe to push down barb portion for the other end of fixed arm outside perk is convenient for catch the leaflet. However, in clinical operation, since the barb portion and the fixing arm have a preset angle, and in a natural state, the barb portion is expanded outward, this also results in that the fixing arm cannot be recovered after being separated from the sheath, and the everted barb portion also increases the loading tube diameter of the delivery sheath during loading, which is not favorable for transfemoral operation.
In summary, the problems to be solved in the art include: how to make the artificial valve leaf more closely stick to the shape of the autologous valve leaf, is not limited by the structure of the bracket, can be recovered again after the positioning piece is released, and can also be used for minimally invasive intervention operation, so that the injury of the operation to the patient is greatly reduced.
Disclosure of Invention
The present application has been made in view of the above and other concepts. The primary object of the present application is to overcome some of the problems and deficiencies of the prior art.
According to an aspect of the present application, there is provided a valve prosthesis for facilitating capture of a leaflet, comprising: the valve prosthesis delivery device comprises an expandable stent for supporting and anchoring, a positioning part for positioning and clamping autologous valve leaflets, and a delivery system for delivering the valve prosthesis, wherein the expandable stent is provided with an inflow end and an outflow end, the positioning part comprises a connecting part arranged at a far end and a positioning part arranged at a near end, the expandable stent is provided with a plurality of connecting structures at the outflow end, the connecting structures are provided with supporting rods, one ends of the supporting rods are connected with the connecting part of the positioning part, and the other ends of the supporting rods are connected with the connecting structures; when the valve prosthesis reaches the target position, the positioning part of the positioning part extends out of the conveying system, and two ends of the expandable stent are limited by the conveying system, so that the proximal end of the strut is supported towards the outer side of the expandable stent relative to the distal end of the strut, and the positioning part of the positioning part is driven to be supported towards the outer side direction of the expandable stent.
According to one embodiment, the connecting structure is a grid-like structure and the struts are arranged within the grid of the connecting structure; this design has at least 2 benefits: firstly, when the valve prosthesis is compressed and loaded, the loading pipe diameter cannot be increased, and the valve prosthesis is favorable for the entry transportation through blood vessels; secondly, the supporting rod is arranged in the grid, when the positioning element catches the valve leaflets and is not ideal or other problems occur to the valve prosthesis, the supporting rod can not affect the recovery of the valve prosthesis completely, and the fault tolerance of the instrument is improved.
According to an embodiment, in a natural state, the axial length of the connecting structure is greater than the length of the strut; this makes the pole support all in the net of connection structure under loading or natural state, has utilized connection structure's net space, can not increase its loading pipe diameter.
According to an embodiment, the connecting structure is arranged in a substantially diamond-shaped configuration.
According to one embodiment, the intermediate end portion of the connecting structure is arched outward of the expandable stent, and one end of the connecting structure in the outflow direction is curved or bunched up toward the center of the expandable stent.
According to one embodiment, one end of the strut is fixedly connected to the connecting structure, the other end of the strut is free, and the other end of the strut is bent or inclined toward the inside of the expandable stent; the purpose of this design is: the connecting part of the positioning part is connected with the other end of the supporting rod, so that the positioning part of the positioning part is tightly attached to the outer side of the expandable bracket in a natural state, the clamping force of the positioning part is obviously improved, and the anchoring effect of the valve prosthesis is enhanced.
According to one embodiment, in a natural state, the positioning part of the positioning part is tightly attached to the outer side of the expandable bracket; the design of branch makes the setting element can be to the opening of the outside direction of expandable support bigger angle when catching the valve leaf, simultaneously after catching the valve leaf, the setting element can provide powerful clamping-force again, makes its valve prosthesis can stable anchor in the heart.
According to one embodiment, the supporting rod is provided with a concave part for connection, the connecting part of the positioning piece is provided with a convex part, and the convex part is meshed with the concave part when the positioning piece is loaded; the convex part is meshed with the concave part, so that the connection strength between the positioning piece and the support rod can be effectively increased.
According to an embodiment, the connecting parts of the adjacent positioning parts are matched and connected with the same supporting rod, and a sleeve part is arranged at the connecting part of the connecting part and the supporting rod.
According to one embodiment, the positioning piece is arranged in a U-shaped structure, and after the valve prosthesis is implanted, the positioning part of the positioning piece is positioned at the root part of the autologous valve; further, when the valve prosthesis is used for treating an aortic valve, after the valve prosthesis is implanted, the positioning part of the positioning part is positioned at the sinus bottom position of the aortic valve.
According to one embodiment, the positioning part of the positioning part is provided with a buffering structure, and the buffering structure is arranged in a V-shaped or U-shaped structure; the buffer structure can avoid the situation that the positioning piece is broken due to stress concentration after compression loading.
According to one embodiment, after the positioning member captures the native valve leaflets, the inflow end of the expandable stent is released, so that the native valve leaflets are clamped between the positioning member and the expandable stent, and then the outflow end of the expandable stent is released, and the valve prosthesis is implanted.
Compared with the prior art, the application has the advantages and beneficial technical effects that at least the following are included:
1. the existing valve with the positioning piece is limited by the opening size of the positioning piece, and the valve is difficult to enter the sinus due to different anatomical structures and insufficient opening size of the positioning piece in the clinical sinus entering process, so that an operator needs to repeatedly try for completing the sinus entering, the operation difficulty is increased, and the operation time is greatly prolonged; be different from prior art, an embodiment of this application utilizes branch and setting element to be connected for the both ends of expandable support are compressed the back, and the one end of branch is gathered together to the support center, and the other end of branch then drives the setting element and props up to expandable support's the outside, thereby makes the setting element when catching autologous leaflet, can show the external-expanding size that increases the setting element, makes it catch leaflet more easily.
2. Unlike the prior art, the connection structure in one embodiment of the present application is a grid-like structure, and the struts are arranged within the grid of the connection structure; this design has at least 2 benefits: firstly, when the valve prosthesis is compressed and loaded, the loading pipe diameter cannot be increased, and the valve prosthesis is favorable for the entry transportation through blood vessels; secondly, the supporting rod is arranged in the grid, when the positioning element catches the unsatisfactory valve leaflets or other problems of the valve prosthesis occur, the supporting rod can not influence the recovery of the valve prosthesis completely, and the fault tolerance of the device is improved.
3. Unlike the prior art, in one embodiment of the present application, one end of the strut is fixedly connected to the connection structure, the other end of the strut is free, and the other end of the strut is bent or inclined toward the inside of the expandable stent; the purpose of this design is: the connecting portion of setting element is connected with the other end of branch, under natural state, can be so that the location portion of setting element hugs closely the outside of expandable support, is showing the clamping-force that improves the setting element, strengthens valve prosthesis's anchoring effect.
4. Different from the prior art, in one embodiment of the application, the support rod is provided with a concave part for connection, the connecting part of the positioning piece is provided with a convex part, and the convex part is meshed with the concave part when the positioning piece is loaded; the convex part is meshed with the concave part, so that the connection strength between the positioning piece and the support rod can be effectively increased.
5. Different from the prior art, in one embodiment of the application, the positioning part of the positioning part is provided with a buffering structure, and the buffering structure is arranged in a V-shaped or U-shaped structure; the buffer structure can avoid the situation that the positioning piece is broken due to stress concentration after compression loading.
Embodiments of the present application may realize other beneficial technical effects not listed, which other technical effects may be partially described below and are expected and understood by those skilled in the art after reading the present application.
Drawings
The above-mentioned and other features and advantages of these embodiments, and the manner of attaining them, will become more apparent and the embodiments of the application will be better understood by reference to the following description taken in conjunction with the accompanying drawings, wherein:
FIGS. 1a-1c are schematic views showing the overall structure of the expandable stent of the present invention.
Fig. 2a-2d are schematic structural and connection views of the strut of the present invention, wherein fig. 2b is a partially enlarged view of a circled portion a in fig. 2 a.
Fig. 3a and 3b are schematic views of the buffering structure of the present invention.
FIGS. 4a-4d are schematic illustrations of the release of an expandable release stent of the present invention.
The names of the parts indicated by the numbers in the drawings are as follows: 1-expandable stent, 11-inflow end, 12-outflow end, 13-connection structure, 14-strut, 141-recess, 2-location, 21-connection, 211-protrusion, 22-location, 221-buffer structure, 3-sleeve, 4-delivery system.
Detailed Description
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description and drawings, and from the claims.
It is to be understood that the embodiments illustrated and described are not limited in application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The illustrated embodiments are capable of other embodiments and of being practiced or of being carried out in various ways. Examples are provided by way of explanation of the disclosed embodiments, not limitation. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present application without departing from the scope or spirit of the disclosure. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. Accordingly, the disclosure is intended to cover such modifications and variations as fall within the scope of the appended claims and their equivalents.
Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items possible.
In this context, "axial" refers to a direction generally along the central axis of the aorta at the surgical site, and "transverse" refers to a direction generally transverse, preferably perpendicular, to the "axial" direction.
The present application will be described in more detail below with reference to various embodiments and examples of several aspects of the application.
In this application, proximal refers to the end proximal to the apex of the heart and distal refers to the end distal to the operating apex of the heart.
The existing valve with the positioning piece is limited by the opening size of the positioning piece, and the valve is difficult to enter the sinus in the clinical sinus entering process due to different anatomical structures and insufficient opening size of the positioning piece, so that an operator needs to repeatedly try for many times to complete the sinus entering, the operation difficulty is increased, and the operation time is greatly prolonged. In the CN201610009313.2, a fixed arm is connected to a stent, a point where the stent is connected to the fixed arm is defined as a fixed arm connection point, one end of the fixed arm connection point forms a barb portion, the barb portion is tilted toward the outside of the stent in a natural state, and when a leaflet is captured, the barb portion is pressed by a delivery sheath so that the fixed arm is supported toward the outside of the stent. However, this solution has at least the following drawbacks: 1. the fixing arm and the barb part both need rigidity with larger strength to ensure that the barb part can tilt the fixing arm and the fixing arm can effectively clamp the self valve leaflet, which will certainly influence the compression and sheathing of the fixing arm and the condition that the fixing arm is difficult to recover by a conveying system after the fixing arm is released; 2. the barb part is tilted towards the outer side of the bracket in a natural state, so that the loading pipe diameter of the conveying sheath pipe can be increased, and the conveying through the approach of a blood vessel is not facilitated.
In one embodiment of the present invention, the present invention comprises an expandable stent 1 for supporting and anchoring, a positioning member 2 for positioning and clamping a native valve leaflet, and a delivery system 4 for delivering the valve prosthesis, as shown in fig. 1a to 1c, the expandable stent 1 has an inflow end 11 and an outflow end 12, the positioning member 2 includes a connecting portion 21 and a positioning portion 22, the expandable stent 1 is provided with a plurality of connecting structures 13 at the outflow end 12, a strut 14 is provided on the connecting structure 13, one end of the strut 14 is connected with the connecting portion 21 of the positioning member 2, and the other end of the strut 14 is connected with the connecting structure 13; when the valve prosthesis reaches the target position, the positioning part 22 of the positioning part 2 extends out of the delivery system 4, and two ends of the expandable stent 1 are limited by the delivery system 4, so that one end of the strut 14 is propped up towards the outer side of the expandable stent 1 relative to the other end of the strut 14, and the positioning part 22 of the positioning part 2 is driven to prop up towards the outer side direction of the expandable stent 1.
According to an embodiment, the connecting structure 13 is a grid-like structure, in this embodiment, the connecting structure 13 is a grid with a diamond structure, and the struts 14 are arranged in the grid with the diamond structure, as shown in fig. 2a and 2 b; this design has at least 2 benefits: firstly, when the valve prosthesis is compressed and loaded, the loading pipe diameter cannot be increased, and the valve prosthesis is favorable for the entry transportation through blood vessels; secondly, the supporting rod 14 is arranged in the grid, when the positioning element 2 catches the valve leaflets undesirably or other problems occur in the valve prosthesis, the supporting rod 14 does not affect the recovery of the valve prosthesis at all, and the fault tolerance of the instrument is improved.
According to an example, in the natural state, the axial length of the connection structure 13 is greater than the length of the strut 14; this allows the struts 14 to be within the lattice of the connecting structure 13 in the stowed or natural state, taking advantage of the lattice space of the connecting structure 13 without increasing its stowage tube diameter.
According to one example, the middle end of the connecting structure 13 is arched towards the outside of the expandable stent 1, and the end of the connecting structure 13 in the direction of the outflow end 12 is curved or bunched towards the center of the expandable stent 1, as shown in fig. 2 b.
According to an example, one end of the strut 14 is fixedly connected to the connection structure 13, the other end of the strut 14 is free, and the other end of the strut 14 is bent or inclined toward the inside of the expandable stent 1, as shown in fig. 2 c; the purpose of this design is: the connecting part 21 of the positioning part 2 is connected with the other end of the support rod 14, so that the positioning part 22 of the positioning part 2 can be tightly attached to the outer side of the expandable stent 1 in a natural state, the clamping force of the positioning part 2 is obviously improved, and the anchoring effect of the valve prosthesis is enhanced.
According to an example, in a natural state, the positioning part 22 of the positioning member 2 is tightly attached to the outer side of the expandable stent 1; the design of the strut 14 enables the positioning element 2 to be opened towards the outer side of the expandable stent 1 at a larger angle when capturing the valve leaflets, and meanwhile, the positioning element 2 can provide strong clamping force after capturing the valve leaflets, so that the valve prosthesis can be stably anchored in the heart.
According to an example, the supporting rod 14 is provided with a concave portion 141 for connection, the connecting portion 21 of the positioning member 2 is provided with a convex portion 211, and when loading, the convex portion 211 is engaged with the concave portion 141, as shown in fig. 2 d; the engagement of the convex portion 211 and the concave portion 141 is effective to increase the strength of the connection between the positioning member 2 and the rod 14.
According to an example, the connecting portions 21 of adjacent positioning members 2 are cooperatively connected with the same support rod 14, and the connecting portion 21 is provided with a sleeve member 3 at the connecting portion with the support rod 14, as shown in fig. 1b and 2 d.
According to one example, the positioning part 2 is arranged in a U-shaped structure, and after the valve prosthesis is implanted, the positioning part 22 of the positioning part 2 is located at the root position of the native valve; further, when the valve prosthesis is used for treating an aortic valve, after the valve prosthesis is implanted, the positioning part 22 of the positioning part 2 is located at the sinus bottom position of the aortic valve.
According to an example, the positioning portion 22 of the positioning member 2 is provided with a buffering structure 221, and the buffering structure 221 is provided in a "V" or "U" shape, as shown in fig. 3a and 3 b; the buffer structure 221 can prevent the positioning element 2 from being broken due to stress concentration after compression loading.
According to one example, after the positioning member 2 captures the native valve leaflets, as shown in fig. 4a and 4b, the inflow end 11 of the expandable stent 1 is released, as shown in fig. 4c, so that the native valve leaflets are clamped between the positioning member 2 and the expandable stent 1, and then the outflow end 12 of the expandable stent 1 is released, completing the implantation of the valvular prosthesis, as shown in fig. 4 d.
The foregoing description of the example embodiments of the present application has been presented for the purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the application to the precise configuration and/or constructions disclosed, and obviously many modifications and variations are possible to those skilled in the art in light of the above teaching without departing from the invention. It is intended that the scope and equivalents of the invention be defined by the following claims.
Claims (10)
1. A valve prosthesis for facilitating capture of valve leaflets, comprising an expandable stent for support and anchoring, a positioning member for positioning and clamping native valve leaflets, and a delivery system for delivering the valve prosthesis, the expandable stent having an inflow end and an outflow end, the positioning member comprising a connecting portion disposed at a distal end and a positioning portion at a proximal end, characterized in that: the expandable stent is provided with a plurality of connecting structures at the outflow end, the connecting structures are provided with support rods, one ends of the support rods are connected with the connecting parts of the positioning parts, and the other ends of the support rods are connected with the connecting structures;
when the valve prosthesis reaches the target position, the positioning part of the positioning part extends out of the conveying system, and two ends of the expandable stent are limited by the conveying system, so that the proximal end of the strut props up towards the outer side of the expandable stent relative to the distal end of the strut and drives the positioning part of the positioning part to prop up towards the outer side direction of the expandable stent.
2. The valve prosthesis that facilitates capturing a leaflet of claim 1, wherein: the connecting structure is a grid-like structure, and the struts are arranged within the grid of the connecting structure.
3. The valve prosthesis to facilitate capturing of leaflets of claim 1 or 2, wherein: one end of the supporting rod is fixedly connected with the connecting structure, the other end of the supporting rod is free, and the other end of the supporting rod is bent or inclined towards the inner side of the expandable stent.
4. The valve prosthesis to facilitate capturing of leaflets of claim 3, wherein: in a natural state, the positioning part of the positioning part is tightly attached to the outer side of the expandable bracket.
5. The valve prosthesis that facilitates capturing a leaflet of claim 1 or 2, wherein: the supporting rod is provided with a concave part for connection, the connecting part of the positioning piece is provided with a convex part, and the convex part is meshed with the concave part when the positioning piece is loaded.
6. The valve prosthesis that facilitates capturing a leaflet of claim 5, wherein: the connecting part of the adjacent positioning part is matched and connected with the same supporting rod, and a sleeve part is arranged at the connecting part of the connecting part and the supporting rod.
7. The valve prosthesis that facilitates capturing a leaflet of claim 1, wherein: the positioning piece is arranged in a U-shaped structure, and after the valve prosthesis is implanted, the positioning part of the positioning piece is positioned at the root position of the autologous valve.
8. The valve prosthesis that facilitates capturing a leaflet of claim 7, wherein: the positioning part of the positioning piece is provided with a buffer structure, and the buffer structure is arranged in a V-shaped or U-shaped structure.
9. The valve prosthesis that facilitates capturing a leaflet of claim 1, wherein: in a natural state, the axial length of the connecting structure is greater than the length of the supporting rod.
10. The valve prosthesis that facilitates capturing a leaflet of claim 1, wherein: after the positioning piece captures the autologous valve leaflets, the inflow end of the expandable stent is released, so that the autologous valve leaflets are clamped between the positioning piece and the expandable stent, and then the outflow end of the expandable stent is released, and the implantation of the valve prosthesis is completed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210729612.9A CN115192256A (en) | 2022-06-24 | 2022-06-24 | Valve prosthesis convenient for capturing valve leaflets |
| PCT/CN2023/101843 WO2023246902A1 (en) | 2022-06-24 | 2023-06-21 | Prosthetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210729612.9A CN115192256A (en) | 2022-06-24 | 2022-06-24 | Valve prosthesis convenient for capturing valve leaflets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115192256A true CN115192256A (en) | 2022-10-18 |
Family
ID=83578473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210729612.9A Pending CN115192256A (en) | 2022-06-24 | 2022-06-24 | Valve prosthesis convenient for capturing valve leaflets |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115192256A (en) |
| WO (1) | WO2023246902A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246902A1 (en) * | 2022-06-24 | 2023-12-28 | 宁波健世科技股份有限公司 | Prosthetic valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10433956B2 (en) * | 2010-02-24 | 2019-10-08 | Medtronic Ventor Technologies Ltd. | Mitral prosthesis and methods for implantation |
| CN104274259B (en) * | 2014-10-30 | 2016-06-01 | 宁波健世生物科技有限公司 | The artificial valve prosthese of a kind of band lobe leaf clamping device |
| CN105125322B (en) * | 2015-10-20 | 2017-03-29 | 宁波健世生物科技有限公司 | A kind of new artificial valve's prosthese |
| US20190183639A1 (en) * | 2017-12-19 | 2019-06-20 | St. Jude Medical, Cardiology Division, Inc. | Transcatheter Mitral Valve: Off-Center Valve Design |
| US11318011B2 (en) * | 2018-04-27 | 2022-05-03 | Edwards Lifesciences Corporation | Mechanically expandable heart valve with leaflet clamps |
| CN112618105B (en) * | 2020-12-31 | 2024-04-12 | 上海翰凌医疗器械有限公司 | Valve support, and matching device with valve support and conveying mechanism |
| CN113288519A (en) * | 2021-07-01 | 2021-08-24 | 武汉唯柯医疗科技有限公司 | Transcatheter aortic valve device capable of actively capturing valve leaflets |
| CN115192256A (en) * | 2022-06-24 | 2022-10-18 | 宁波健世科技股份有限公司 | Valve prosthesis convenient for capturing valve leaflets |
| CN115317198A (en) * | 2022-08-09 | 2022-11-11 | 中国人民解放军海军军医大学第一附属医院 | Aorta prosthesis capable of preventing junction reflux |
-
2022
- 2022-06-24 CN CN202210729612.9A patent/CN115192256A/en active Pending
-
2023
- 2023-06-21 WO PCT/CN2023/101843 patent/WO2023246902A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023246902A1 (en) * | 2022-06-24 | 2023-12-28 | 宁波健世科技股份有限公司 | Prosthetic valve |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023246902A1 (en) | 2023-12-28 |
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