CN216495868U - Blocking piece for intervention type conveying device and intervention type conveying device - Google Patents
Blocking piece for intervention type conveying device and intervention type conveying device Download PDFInfo
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- CN216495868U CN216495868U CN202122253298.5U CN202122253298U CN216495868U CN 216495868 U CN216495868 U CN 216495868U CN 202122253298 U CN202122253298 U CN 202122253298U CN 216495868 U CN216495868 U CN 216495868U
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Abstract
The utility model provides a stopper for an intrusive conveying device and the intrusive conveying device, wherein the stopper comprises a fixing part and a stopping part, the fixing part is used for being connected with an inner pipe in a plug-in manner, the stopping part is connected with the fixing part and is of a ring-shaped structure with a closed circumferential direction, and at least the outer contour of the end part of the stopping part is positioned on the periphery of the fixing part; the side wall of the stopper is provided with a fluid channel, the fluid channel is at least positioned at the stopping part, and the fluid channel penetrates through the stopping part or penetrates from one end of the stopping part far away from the fixing part to one end of the fixing part far away from the stopping part in the axial direction of the fixing part. The utility model can ensure that the expansion medium flows more smoothly in the initial stage of expansion of the inflatable balloon, is beneficial to the rapid implementation of interventional therapy, and better prevents the axial displacement of the artificial valve or the stent in the expansion process of the inflatable balloon.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a stopper for an interventional conveying device and the interventional conveying device.
Background
The heart is an important organ of the human body, provides power for the blood circulation of the human body, and the valve inside the heart controls the direction of blood flow, thereby playing an important role in ensuring sufficient blood supply flow through a cardiovascular system. When the native valve is damaged, serious cardiovascular damage and death can be caused, and the artificial heart valve can be used for treating heart valve diseases. At present, the process of implanting the heart valve prosthesis into the body through the catheter usually depends on the catheter intervention type delivery device to deliver the heart valve prosthesis to the predetermined position for release.
The delivery device in the prior art comprises an outer tube, an inner tube penetrating through the distal end of the outer tube, and an inflatable balloon located at the distal end portion of the inner tube, in order to prevent the prosthetic valve or the stent from moving during delivery, two stoppers are fixed to the inner tube, the two stoppers are located in the inflatable balloon, one end of the inflatable balloon is fixed to the distal end of the outer tube, the other end of the inflatable balloon is fixed to the outer wall of the stopper at the distal end of the inner tube, when the delivery device is delivered, the inflatable balloon is in a contracted state, and the prosthetic valve or the stent in a compressed state is mounted on the periphery of the inflatable balloon and located between the two stoppers.
In the delivery device, the two stoppers are required to have a diameter larger than the inner diameter of the prosthetic valve or stent in a compressed state at opposite parts, so that the two stoppers have a larger radial dimension, and when the delivery device carries the prosthetic valve or stent to a treatment site, the inflation medium flows into the proximal region of the inflatable balloon and further flows to the middle region and the distal region. However, in the existing stopper structure, when the inflatable balloon is in a compressed state, the gap between the outer peripheral wall of the inflatable balloon and the two stoppers is too small, so that the gap between the stoppers and the inflatable balloon can be increased only when the proximal region of the inflatable balloon is inflated with an inflation medium first to a relatively large extent, so that the inflation medium flows to the middle region and the distal region of the inflatable balloon, obviously, the inflation interval time at each position of the inflatable balloon is too long, and the whole interventional therapy time is affected; and the expansion mode with larger time interval at each place can cause that the inner wall of the artificial valve or the stent is positioned at the periphery of the stopper in the expansion process of the expandable balloon, and the near end area, especially the near end area, can be expanded to the extent that the inner wall of the artificial valve or the stent is positioned at the periphery of the stopper, while the far end area does not start to be expanded or the expansion medium does not reach, at this moment, the near end of the artificial valve or the stent is not axially blocked by the stopper, and the artificial valve or the stent can be axially inclined relative to the inner tube along with the expansion of the near end area of the expandable balloon, so that the artificial valve or the stent can be axially displaced, the accurate position of the artificial valve or the stent is influenced, and the operation quality and the success rate are reduced.
SUMMERY OF THE UTILITY MODEL
Based on the above situation, the main object of the present invention is to provide a stopper for an interventional conveying device and an interventional conveying device, so as to solve the problem of slow flow of an expansion medium in the prior art.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a stopper for an interventional delivery device, wherein the interventional delivery device is used for delivering a prosthetic valve or a stent to the body of a patient and comprises an outer tube, an inner tube penetrating through the distal end of the outer tube, an expandable balloon and two stoppers which are positioned in the expandable balloon and fixed on the inner tube at intervals, and a containing space for containing the prosthetic valve or the stent in a contraction state is defined by the part of the expandable balloon positioned between the two stoppers and the two stoppers;
the stopper comprises a fixing part and a stopping part, wherein the fixing part is used for being connected with the inner tube in an inserting way, the stopping part is used for limiting the artificial valve or the stent, the stopping part is of a circumferentially closed annular structure, and the maximum radial dimension from the outer edge of at least one end part of the stopping part to the axis of the fixing part is larger than the radius of the fixing part;
the side wall of the stopper is provided with a fluid channel, the fluid channel is at least positioned at the stopping part, and the fluid channel penetrates through the stopping part or penetrates from one end of the stopping part far away from the fixing part to one end of the fixing part far away from the stopping part in the axial direction of the fixing part.
Preferably, the stopper is of a straight cylindrical structure, and the fluid passage is not perpendicular to the axis of the fixing part.
Preferably, the fluid passage includes a first fluid passage located at the stopper portion, and the first fluid passage penetrates from one end surface of the stopper portion, which is away from the fixing portion, to the other end surface.
Preferably, the fluid passage includes a second fluid passage penetrating the stopper portion and the fixing portion, and an axis of the second fluid passage is inclined with respect to an axis of the fixing portion and is located at one end of the stopper portion farther from the axis of the fixing portion than the other end thereof.
Preferably, the stopper further comprises a connecting portion in a shape of a conical tube, a large diameter end of the connecting portion is connected with the stopper portion, and a small diameter end of the connecting portion is connected with the fixing portion.
Preferably, the stopper part is in a conical cylindrical structure, and the small end of the stopper part is connected with the fixing part; the fluid passage includes a first fluid passage at the stopper portion, the first fluid passage penetrating from an inner wall surface to an outer wall surface of the stopper portion.
Preferably, the axis of the first fluid passage is parallel to the axis of the fixed portion; or the axis of the first fluid channel is obliquely arranged relative to the axis of the fixing part, and one end of the first fluid channel, which is positioned on the inner wall surface, is far away from the axis of the fixing part than the other end of the first fluid channel.
Preferably, the stopper is provided with a plurality of the fluid passages in a circumferential direction.
Preferably, the annular structure comprises a plurality of protruding structures arranged along the circumferential direction, a recessed area between two adjacent protruding structures forms a recessed structure, the protruding structures are formed by protruding the inner annular surface and the outer annular surface of the annular structure towards the direction away from the axis of the fixing part, and the recessed structure is formed by recessing the inner annular surface and the outer annular surface of the annular structure towards the direction close to the axis of the fixing part.
A second aspect of the utility model provides an interventional delivery device for delivering a prosthetic valve or stent into a patient; comprising a stopper as defined in any of the above.
[ PROBLEMS ] the present invention
The stopper of the stopper is of a closed structure in the circumferential direction, and the first fluid channel and the second fluid channel are arranged, so that when the stopper is installed on a conveying device, after an expansion medium flows out from the annular cavity between the inner tube and the outer tube, the expansion medium can flow from the proximal area to the middle area and the distal area of the inflatable balloon through a gap between the peripheries of the inflatable balloon and the stoppers, and can also flow into the middle area of the inflatable balloon through the fluid channel of one stopper and further flow into the distal area of the inflatable balloon through the fluid channel on the other stopper, and as a medium flow channel formed by the fluid channels on the two stoppers is always in a communicated state, the smooth flow of the expansion medium can be realized in the middle area, particularly the distal area of the inflatable balloon without waiting for the proximal area of the inflatable balloon to be expanded to a large enough size, therefore, the expansion medium can basically reach the proximal region, the middle region and the distal region of the inflatable balloon at the same time, so that the expansion time of the inflatable balloon is shortened, and the interventional therapy can be rapidly carried out; by adopting the stopper, all areas of the inflatable balloon can be gradually inflated by inflow of an inflation medium at the same time, so that all parts of the artificial valve or the stent can be unfolded to the same degree along with the gradual inflation of the inflatable balloon, the artificial valve or the stent cannot be inclined, the artificial valve or the stent can be prevented from axial displacement in the inflation process of the inflatable balloon as far as possible, the position accuracy of the artificial valve or the stent in a patient body is improved, and the operation quality and the success rate are increased; meanwhile, the strength of the stopping part can be reduced due to the fact that the fluid channel is arranged on the side wall of the blocking part, the end face of the artificial valve or the support can be pressed against the stopping part in the transmission process, the stopping part is deformed, and the artificial valve or the support is displaced in the conveying process.
Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.
Drawings
Preferred embodiments of the interventional delivery device of the present invention will be described below with reference to the accompanying drawings. In the figure:
FIG. 1 is a schematic view of the construction of a preferred embodiment of the flight of the present invention;
FIG. 2 is a cross-sectional schematic view in longitudinal cross-section of a preferred embodiment of a flight of the present invention;
FIG. 3 is a cross-sectional schematic view in longitudinal cross-section of another preferred embodiment of a flight of the present invention;
FIG. 4 is a schematic structural view of yet another preferred embodiment of the flight of the present invention;
FIG. 5 is a cross-sectional schematic view in longitudinal section of yet another preferred embodiment of a flight of the present invention;
FIG. 6 is a schematic structural view of yet another preferred embodiment of a flight in accordance with the present invention;
FIG. 7 is a cross-sectional schematic view in longitudinal section of yet another preferred embodiment of a flight of the present invention;
FIG. 8 is a schematic cross-sectional view of a preferred embodiment of a stop portion of a flight in accordance with the present invention;
FIG. 9 is a schematic structural view of a preferred embodiment of the interventional delivery device of the present invention;
FIG. 10 is a schematic partial cross-sectional view of a preferred embodiment of the interventional delivery device of the present invention.
In the figure, the position of the upper end of the main shaft,
10. an outer tube;
20. an inner tube;
30. an inflatable balloon;
40. a first stopper; 41. a stopper portion; 411. a raised structure; 412. a recessed structure; 42. a fixed part; 421. a fabrication hole; 43. a connecting portion; 44. a first fluid channel; 45. a second fluid passage;
50. a second stopper;
60. a guide;
70. an operating handle;
80. the connecting pipe can be bent;
90. a three-way pipe.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in order to avoid obscuring the nature of the present invention, well-known methods, procedures, and components have not been described in detail.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that in the description of the present invention, the distal end and the proximal end are relative to the operator of the delivery device, the proximal end refers to the end near the operator, and the distal end refers to the end far from the operator, i.e. for the same component, if it only partially extends into the patient, the end extending into the patient is the distal end, and the end located outside the patient and near the operator is the proximal end.
The utility model provides an interventional delivery device for delivering an artificial organ or stent, such as a prosthetic valve or stent, to a treatment site of a patient. As shown in fig. 9 and 10, the interventional delivery device comprises a guide 60, an outer tube 10, an inner tube 20 passing through the distal end of the outer tube 10, an inflatable balloon 30, a first stop 40 and a second stop 50 located within the inflatable balloon 30 and fixed to the inner tube 20, the guide 60 being connected to the distal end of the inner tube 20; the second stopper 50 is closer to the guide 60 than the first stopper 40, the first stopper 40 is closer to the distal end of the outer tube 10 than the second stopper 50, one end of the inflatable balloon 30 is mounted at the distal end region of the outer tube 10 and can be connected by bonding, welding or the like, and the other end is mounted at the distal end region of the inner tube 20, and specifically can be mounted on at least one of the guide and the second stopper 50; specifically, the inner tube 20 is inserted into the outer tube 10 with an annular cavity formed therebetween for the flow of the inflation medium, the inner tube 20 extends beyond the distal end of the outer tube 10, and the first stop 40 and the second stop 50 are mounted to the inner tube 20 in the region extending beyond the outer tube 10. A gap is left between the first stopper 40 and the outer tube 10, that is, the proximal end of the first stopper 40 is not in contact with the end surface of the outer tube 10, so that the expansion medium in the annular cavity can flow out from the gap between the outer tube 10 and the first stopper 40.
The utility model also provides a flight that can be used in an interventional transport device, in particular, in the first flight 40 and the second flight 50 described above. Referring to fig. 1-8, the stopper comprises a fixing portion 42 for being inserted into the inner tube 20 and a stopping portion 41 for limiting the position of the prosthetic valve or the stent, the fixing portion 42 is a cylindrical tubular structure, the stopping portion 41 is a circumferentially closed annular structure, i.e. the stopping portion 41 is connected with each other at all circumferential upper edges, no completely disconnected region exists, the maximum radial dimension from the outer edge of at least one end of the stopping portion 41 to the axis of the fixing portion 42 is larger than the radius of the fixing portion 42, and the projection profile of at least one end of the stopping portion 41 in the axial projection of the fixing portion 42 is outside the projection profile of the fixing portion 42. The sidewall of the stopper is provided with fluid channels (such as a first fluid channel 44 and a second fluid channel 45), the fluid channels are at least located at the stopping portion 41, in the axial direction of the fixing portion 42, the fluid channels pass through the stopping portion 41 or pass through from one end of the stopping portion 41 away from the fixing portion 42 to one end of the fixing portion 42 away from the stopping portion 41, that is, the fluid channels may be located only at the stopping portion 41, the fluid channels are referred to as the first fluid channel 44, the fluid channels may also be located at both the stopping portion 41 and the fixing portion 42, the fluid channels are referred to as the second fluid channel 45, that is, the fluid channels include the first fluid channel 41 and the second fluid channel 42, the first fluid channel 44 passes through the stopping portion 41 in the axial direction of the fixing portion 42, the second fluid channel 45 is partially located at the stopping portion 41 and partially located at the fixing portion 42, and when the connecting portion 43 (detailed below) is included, is also located at the connecting portion 43, that is, the second fluid channel 45 is disposed on the entire first stopper 40, and the second fluid channel 45 penetrates the entire stopper in the axial direction of the fixing portion 42, from the end of the stopper portion 41 away from the fixing portion 42 to the end of the fixing portion 42 away from the stopper portion 41. It should be noted that the through holes described herein are not limited to the through holes in the axial direction, and may be formed in other directions, for example, the through holes may be formed in a direction inclined with respect to the axial direction of the fixing portion 42, that is, the through holes may be formed in an embodiment in which the axes of the first fluid passage 44 and the second fluid passage 45 are inclined with respect to the axial direction of the fixing portion 42.
When the first stopper 40 and the second stopper 50 are the above stoppers, the parts of the two stoppers that are close to each other are the respective stopper portions 41, the respective fixing portions 42 are connected to the inner tube 20, the first stopper 40 is provided with the first fluid channel 44 or the second fluid channel 45, and the second stopper 50 is provided with the first fluid channel 44. That is, the first stopper 40 and the second stopper 50 each include a fixing portion 42 and a stopper portion 41 that are axially connected, and the fixing portion 42 is connected to the inner tube 20, specifically, is connected to the inner tube 20 in a plug-in manner. The stopping portion 41 is located at a section where the first stopper 40 and the second stopper 50 are close to each other, and in the axial direction, for the first stopper 40, the stopping portion 41 is closer to the second stopper 50 than the fixing portion 42 thereof, and for the second stopper 50, the stopping portion 41 is closer to the first stopper 40 than the fixing portion 42 thereof. Wherein the sidewall of the first stopper 40 is provided with the first fluid channel 44 or the second fluid channel 45, the sidewall of the second stopper 50 is provided with the first fluid channel 44, and the first fluid channel 44 and the second fluid channel 45 form a medium flow passage for the expandable medium to flow. As shown in fig. 9 and 10, the second stopper 50 is provided with a medium flow path (i.e., the first fluid channel 44) only on the stopper 41, and the first stopper 40 may be provided with a medium flow path (i.e., the first fluid channel 44) only on the stopper 41, or may be provided with a medium flow path (i.e., the second fluid channel 45) on both the stopper 41 and the fixing portion 42.
When the inflatable balloon 30 is in a contracted state, a part of the inflatable balloon, which is located between the two stopping portions 41, and the two stopping portions 41 enclose an accommodating space of the artificial valve or the stent, and when the artificial valve or the stent which is in a compressed state is located in the accommodating space, in an axial projection of the inner tube 20, two end faces of the artificial valve or the stent respectively have overlapping areas with end faces of the adjacent stopping portions 41, so that when the artificial valve or the stent which is in the compressed state is located in the accommodating space, end portions of the two stopping portions 41 axially limit the artificial valve or the stent. That is, the inflatable balloon 30 has a deflated state and an inflated state, and the inflatable balloon 30 can be inflated at least in a radial direction by inflating the inflatable balloon 30 with an inflation medium, thereby placing the prosthetic valve or stent positioned thereon within the patient; in the collapsed state, the prosthetic valve or stent may be mounted outside of the inflatable balloon 30 with both end surfaces of the prosthetic valve or stent substantially abutting the end surfaces of the two stops 41.
When the first stopper 40 and the second stopper 50 use the above stoppers, the prosthetic valve or stent in a compressed state is located in the accommodating space when the delivery device is operated, when the delivery device delivers the prosthetic valve or stent to the treatment site of the patient, the inflation medium is introduced, flows into the gap between the first stopper 40 and the distal end of the outer tube 10 through the annular cavity between the inner tube 20 and the outer tube 10, flows out into the proximal region of the inflatable balloon 30, enters the middle region of the inflatable balloon 30 through the first fluid passage 44 or the second fluid passage 45 of the first stopper 40, and thus the first fluid passageway 44 through the second stop 50, into the distal region of the inflatable balloon 30, which, of course, during this process, some of the inflation medium may also flow into the gaps between the outer circumferential surfaces of the first and second stops 40, 50 and the inflatable balloon 30 and into the intermediate and distal regions.
The stopper, the stopper 41 is of a closed structure in the circumferential direction, and by providing the first fluid channel 44 and the second fluid channel 45, after the stopper is installed in the delivery device, when the inflation medium flows out from the annular cavity between the inner tube 20 and the outer tube 10, the inflation medium can not only flow from the proximal region to the middle and distal regions of the inflatable balloon 30 through the gaps between the inflatable balloon 30 and the outer peripheral walls of the first stopper 40 and the second stopper 50, but also flow into the middle region of the inflatable balloon 30 through the first fluid channel 44 or the second fluid channel 45 on the first stopper 40, and further flow into the distal region of the inflatable balloon 30 through the first fluid channel 44 on the second stopper 50, because the medium flow channel formed by the first fluid channel 44 and the second fluid channel 45 is always in a communication state, the middle region, particularly the distal region of the inflatable balloon 30 can be inflated without waiting for the proximal region to be inflated sufficiently large The inflation medium circulates, that is, the inflation medium can reach the proximal region, the middle region and the distal region of the inflatable balloon 30 at the same time, so that the inflation time of the inflatable balloon 30 is shortened, and the interventional therapy can be performed quickly; and adopt this kind of fender piece and conveyor of this application, each region of inflatable sacculus 30 can be the inflation medium inflow at the same time basically, expands gradually, consequently, artifical valve or support can be the expansion of the same degree along with inflatable sacculus gradually everywhere, also can not cause artifical valve or support to take place the slope to can avoid artifical valve or support to take place axial displacement at inflatable sacculus inflation in-process as far as possible, and then improve the position precision that artifical valve or support placed in patient, increase operation quality and success rate.
Wherein the inflatable balloon 30 includes a first region near its distal end and a second region near its proximal end, and an intermediate region between the first region and the second region, the first region and the second region having a substantially conical configuration and the intermediate region having a cylindrical configuration when the inflatable balloon 30 is inflated, the intermediate region being located in the intermediate region when in a compressed state. Therefore, it is preferable that the first flight 40 is located in the second area of the package and the second flight 50 is located in the first area of the package.
In some embodiments, the stop portions 41 are configured as a plurality of resilient fingers, i.e., the anchoring portion 42 is simultaneously connected to a plurality of spaced apart fingers, such that the inflation medium is able to flow through the gaps between the two resilient fingers to the intermediate and distal regions of the inflatable balloon 30, in order to allow the inflation medium to reach the respective regions of the inflatable balloon 30 substantially simultaneously. However, in the structure, the elastic fingers are separated from each other and are of a cantilever structure, the degree of freedom in all directions is large, and the elastic fingers are easy to shake in the transportation process and the like and even deform under the influence of vibration and the like, so that the limiting precision of the artificial valve or the stent is reduced in the later use process; when the delivery device is used for installing the artificial valve or the stent, and before entering a patient or during transmission in the patient, the plurality of finger-shaped structures are easy to shake and deform in the circumferential direction and the axial direction, so that the artificial valve or the stent slides; and the strength of the finger-shaped structure is weak, and the finger-shaped structure is easy to deform when being pressed by the end part of the artificial valve or the bracket, so that the limiting precision of the artificial valve or the bracket is influenced. In the utility model, the stopper is of a circumferentially closed annular structure, and the first fluid channel 44 and the second fluid channel 45 are arranged on the side wall of the stopper, so that the strength of the stopper 41 is improved, the problem that the strength of the stopper 41 is reduced due to the fact that the medium channel is arranged on the side wall of the stopper, which influences the displacement of the artificial valve or the stent in the transmission process, can be avoided, and the expansion medium can reach all areas of the inflatable balloon 30 as far as possible at the same time.
Considering that the distal end of the inflatable balloon 30 still needs to be connected with the distal end region of the inner tube 20 during the inflation process, and does not need to be inflated, and it is necessary to ensure the sealing performance at this location, the opening of the distal end region of the inflatable balloon 30 is often set to be relatively small, the stopper 41 in the present application is an elastic part with radial elasticity, which can be formed into an elastic member by structural arrangement, or can be formed by selecting a material with elastic properties, such as block polyether amide resin (PEBAX), and when the latter is selected, the whole stopper can be made of the material with elastic properties for the convenience of processing; the stopper 41 may also have its radially compressible elastic capacity enhanced by its own structure and material selection. By providing the stop 41 as a resilient portion, the mounting of the inner tube 20 with the stop mounted thereto from the distal opening of the inflatable balloon 30 is facilitated. And when installing the artificial valve or the stent, in order to make the artificial valve or the stent in a better contraction state, a tool clamp or the like for compressing the artificial valve or the stent may compress the stopping parts 41 together in a radial direction, and by the radially compressible stopping parts 41, the stopping parts 41 can be compressed together with the compression of the artificial valve or the stent, so that the compression process of the artificial valve or the stent is not hindered.
The stop portion 41 may be a tapered cylindrical structure, a straight cylindrical structure, or another special-shaped structure, and as long as the end face thereof and the end face of the prosthetic valve or the stent have an overlapping region in the axial direction of the fixing portion 42, axial limit on the prosthetic valve or the stent may be achieved.
In a preferred embodiment, the stopper 41 has a tapered cylindrical structure, the sidewall of the stopper 41 extends along a direction inclined relative to the axis of the fixing portion 42, that is, the maximum radial dimension of the stopper 41 from each position along the axial direction to the axis of the fixing portion 42 is different, and the stopper 41 has an inner wall surface and an outer wall surface which are opposite to each other, the extending directions of the inner wall surface and the outer wall surface are both inclined relative to the axis of the inner tube 20, the generatrix of the inner wall surface and the outer wall surface is a straight line which forms a non-zero included angle with the axis of the inner tube, the cross section of the stopper 41 may be a circular ring surface, or may have other special-shaped structures, referring to fig. 6 and 7, the small end of the stopper 41 is connected with the fixing portion 42, in this embodiment, the outer contour of the large end (i.e., the end) of the stopper 41 is located at the outer periphery of the fixing portion 42, the outer contours of the inner and the outer peripheries of the inner and outer walls are located at the outer periphery of the fixing portion 42, and the small end is overlapped with the outer periphery of the fixing portion 42, with this configuration, more space is left between the proximal region of the inflatable balloon 30 and the first stop 40, thereby allowing inflation medium to enter each of the first or second fluid passageways 44, 45 more rapidly. In the embodiment where the stopper 41 has a tapered tubular structure, the stopper is provided with only the first fluid channel 44, and one opening of the first fluid channel 44 may be provided at an end surface of the stopper 41 away from the fixing portion 42, or may be provided at an inner wall surface of the stopper 41. When the stopper 41 has a tapered tubular structure, the first fluid channel 44 penetrates from the inner wall surface to the outer wall surface of the stopper 41, that is, one opening of the first fluid channel 44 is disposed on the inner wall surface of the stopper 41, and the other opening is disposed on the outer wall surface, that is, the first fluid channel 44 penetrates through the side wall of the stopper 41, and the penetrating direction thereof may be perpendicular to the thickness direction of the side wall or may form a certain angle with the thickness direction, but it also forms an angle with the generatrix of the stopper 41 (including the generatrix of the outer wall surface and the generatrix of the inner wall surface), that is, it cannot be parallel to the generatrix. With this configuration, the sidewall of the conical cylindrical structure need not be too thick, and thus, the radial compressibility of the stop 41 is facilitated, further facilitating the mounting of the inner tube 20 and inflatable balloon 30 to which the first and second stoppers 40, 50 are mounted.
Further preferably, the conduit axis of the first fluid passage 44 is parallel to the axis of the fixed portion 42, as shown in fig. 7; or the first fluid passage 44 is disposed obliquely with respect to the axis of the fixing portion 42, and one end of the inner wall surface thereof is located farther from the axis of the fixing portion 42 than the other end thereof, that is, away from the inner shaft 20, and the opening of the first fluid passage 44 located on the inner wall surface is located farther from the inner tube 20 than the opening located on the outer wall surface, in this way, the swelling medium ejected from the first fluid passage 44 of the first stopper 40 can flow more quickly toward the second stopper 50; the middle area of the inflatable balloon 30 is surrounded by the artificial valve or the stent, the acting force required during inflation is larger than that of the distal area and the proximal area, and the first fluid channel 44 adopting the inclined arrangement mode can form a certain injection effect on the middle area of the inflatable balloon 30 because the injection direction of the first fluid channel 44 faces to the middle area, so that the area can be inflated better.
In another embodiment, the stopper portion 41 has a straight cylindrical structure, the side wall of the stopper portion 41 extends in a direction parallel to the axis of the fixing portion 42, as shown in fig. 1 to 5, the maximum radial dimension of the stopper portion 41 from the axial direction to the axis of the fixing portion 42 is the same, and the stopper portion 41 also has an inner wall surface and an outer wall surface, the extending directions of which are parallel to the axis of the inner tube 20, generatrices of which are parallel to the axis of the inner tube 20, in this embodiment, the outer contour of each portion of the stopper portion 41 in the entire axial direction is located on the outer periphery of the fixing portion 42, in order to make the stopping part 41 more easily realize radial compressibility, a gap is left between the inner wall surface of the straight cylindrical structure and the inner tube 20, and by adopting the straight cylindrical structure, the axial strength of the stopping part 41 can be further increased, and the axial limiting effect of the stopping part on the artificial valve or the stent can be better improved.
When the stopping portion 41 is in a straight cylindrical structure, that is, the stopper is in a stepped structure, if the first fluid channel 44 penetrates through the stopping portion 41 in the thickness direction of the sidewall, the gap between the outer wall surface of the stopping portion 41 and the inflatable balloon 30 is relatively small, which is not favorable for the inflation fluid to rapidly enter the first fluid channel 44, in a preferred embodiment of the present invention, the first fluid channel 44 penetrates from one end surface of the stopping portion 41 away from the fixing portion 42 to the other end surface, that is, the first fluid channel 44 extends along a generatrix of the outer wall surface or a generatrix of the inner wall surface, an opening at one end is located at the end surface of the stopping portion 41 away from the fixing portion 42, and an opening at the other end is located on the stepped surface of the stepped structure, so that the inflation medium can rapidly enter the first fluid channel 44 when flowing to the periphery of the fixing portion 42. Specifically, the axis of the first fluid passage 44 and the axis of the fixing portion 42 may be parallel, that is, the first fluid passage 44 extends in a generatrix direction parallel to the outer wall surface (or the generatrix direction of the inner wall surface), that is, the axis of the first fluid passage 44 is parallel to the axis of the fixing portion 42; it is also possible to have an included angle, i.e. the axis of the first fluid channel 44 is inclined relative to the axis of the fixing portion 42, preferably the latter, and the first fluid channel 44 is located at one end of the stopping portion 41 away from the fixing portion 42 and is further away from the inner tube 20 than the other end, as shown in fig. 2, so that the thickness of the side wall of the stopping portion 41 is not increased too much due to the arrangement of the first fluid channel 44, and the inflation medium can enter the first fluid channel 44 more quickly and can have a jetting effect on the middle region of the inflatable balloon 30, thereby overcoming the restriction of the artificial valve or stent on the inflation of the middle region and making the region more easily inflatable. Of course, the first fluid passage 44 may be disposed closer to the inner tube 20 at one end of the stopper portion 41 away from the fixing portion 42 than at the other end.
When the stopper 41 has a straight tubular structure, the first stopper 40 may be provided with the second fluid channel 45, and if the first stopper 40 is provided with the second fluid channel 45, the second fluid channel 45 penetrates from the end surface of the stopper 41 away from the fixing portion 42 to the end surface of the fixing portion 42 away from the stopper 41, as shown in fig. 3 and 5. In this embodiment, the axis of the second fluid channel 45 and the axis of the fixing portion 42 may be parallel, and preferably, the axis of the second fluid channel 45 is disposed obliquely with respect to the axis of the fixing portion 42, and is located at one end of the stopping portion 41 and is farther from the axis of the fixing portion 42 than the other end, that is, the opening of the second fluid channel 45 located at the stopping portion 41 is farther from the inner tube 20 in the radial direction than the other opening, so that the inflation medium emitted from the second fluid channel 45 of the first stopper 40 can have a certain injection effect on the middle region (i.e., the region where the prosthetic valve or the stent is installed) of the inflatable balloon 30, and the injection effect can overcome the compression effect of the prosthetic valve or the stent, thereby enabling the region to be inflated better.
When the first fluid channel 44 and the second fluid channel 45 are disposed obliquely with respect to the axis of the fixing portion 42, the included angles between the axes of the first fluid channel 44 and the second fluid channel 45 and the axis of the fixing portion 42 are 0 ° to 30 °, such as 0 °, 5 °, 10 °, 15 °, 20 °, 25 °, 28 °, 30 °, and the like, so as to better increase the jetting effect of the inflation medium emitted from the first fluid channel 44 and the second fluid channel 45 on the middle region of the inflatable balloon 30, and to be more beneficial to the inflation of the middle region of the inflatable balloon 30.
In the embodiment of the straight cylindrical structure of the stopping portion 41, since the stopping portion 41 needs to axially limit the position of the prosthetic valve or the stent, the outer diameter thereof is set to be larger, and the fixing portion 42 only needs to be fixedly connected with the inner tube 20, and the outer diameter thereof can be set to be smaller, so that the larger radial dimension is directly changed into a smaller radial dimension, which easily causes the first stopper 40 or the second stopper 50 to break. In order to avoid the above problems as much as possible, in a preferred embodiment of the present invention, at least one of the first stopper 40 and the second stopper 50 further includes a connecting portion 43 connected between the stopping portion 41 and the fixing portion 42 thereof, as shown in fig. 4 and 5, only the first stopper 40 includes the stopping portion 41, the connecting portion 43 and the fixing portion 42 connected to each other, and the second stopper 50 includes the stopping portion 41 and the fixing portion 42 connected to each other; or only the second stopper 50 includes the stopper portion 41, the connecting portion 43, and the fixing portion 42 connected to each other, while the first stopper 40 includes the stopper portion 41 and the fixing portion 42 connected to each other; both may also include the mutually connected stopper portion 41, connecting portion 43 and fixing portion 42. By adding the connecting portion 43, a transition effect is performed on the stopping portion 41 and the fixing portion 42, so that the fracture resistance of the first stopper 40 or the second stopper 50 can be improved, and the reliability of the whole conveying system can be improved.
Specifically, the connecting portion 43 may be a circular tubular structure, i.e., a circular cross-section, in which case half of the outer diameter of the circular tubular structure is smaller than the maximum radial distance of the stopper portion 41 from the axis of the inner tube 20 and larger than half of the outer diameter of the fixing portion 42; the inner wall surface of the circular tubular structure may be spaced from the inner tube 20 or may be directly attached to the inner wall surface, and for convenience of assembly, a gap is reserved between the connecting portion 43 and the inner tube 20, that is, only the fixing portion 42 of the first stopper 40 and the second stopper 50 is in contact connection with the inner tube 20. In another embodiment, as shown in fig. 4 and 5, the connecting portion 43 is a conical tubular structure, the cross section of the connecting portion 43 is circular, the inner and outer rings are circular, the large diameter end of the connecting portion 43 is connected to the stopper portion 41, and the small diameter end is connected to the fixing portion 42, that is, the outer wall of the connecting portion 43 is a conical surface, the inner wall is a conical surface, and the connecting portion 43 is a conical tubular structure, so that the transition between the stopper portion 41 and the fixing portion 42 can be well realized, and the damage to the blood vessel wall can be reduced during the transmission in the patient. Of course, the connecting portion 43 may have a pyramid-like tubular structure, i.e., the inner wall surface and the outer wall surface are both pyramid surfaces.
In the above embodiments, the stopper may be provided with a plurality of first fluid channels 44 or second fluid channels 45 along the circumferential direction, so as to further enable the inflation medium to reach all regions of the inflatable balloon 30 in the axial direction more rapidly, and enable the inflatable balloon 30 to receive the force applied by the inflation medium more uniformly all around the circumferential direction.
The structures of the stopping portions 41 of the first stopper 40 and the second stopper 50 may be the same or different, for example, the stopping portions 41 of both may have a tapered cylindrical structure or a straight cylindrical structure; for another example, the stopping portion 41 of the first stopper 40 has a tapered cylindrical structure, and the stopping portion 41 of the second stopper 50 has a straight cylindrical structure; in another example, the stop portion 41 of the first stopper 40 has a straight cylindrical structure, and the stop portion 41 of the second stopper 50 has a tapered cylindrical structure. However, when the stopping portion 41 of the first stopper 40 is a tapered cylindrical structure, since the cross section of the stopping portion 41 is gradually reduced toward the fixing portion 42, and the fixing portion 42 is mainly used for fixing with the inner tube 20, the outer diameter of the fixing portion 42 is often set to be small, in a preferred embodiment, the first stopper 40 is only provided with the first fluid channel 44, and the first fluid channel 44 penetrates from the inner wall surface to the outer wall surface of the stopping portion 41, with such a structure, the first fluid channel 44 can more easily make the inflation medium quickly enter the space between the inner wall surface of the tapered cylindrical structure and the inner tube 20, and further quickly reach each region of the inflatable balloon 30. When the stopper 41 of the first stopper 40 has a straight cylindrical structure, the first stopper 40 can be provided with the first fluid channel 44 or the second fluid channel 45.
The cross section of the stopping part 41 can be a circular ring structure, that is, the inner ring and the outer ring of the cross section of the stopping part 41 are both circular, and when the stopping part 41 is in a straight cylindrical structure, the outer ring surface and the inner ring surface are both cylindrical surfaces; when the stopper 41 has a tapered cylindrical structure, both the outer annular surface and the inner annular surface are conical surfaces. In order to better increase the radial compressibility of the stop portion 41, in a preferred embodiment of the present invention, the annular structure includes a plurality of convex structures 411 arranged along the circumferential direction, the concave area between two adjacent convex structures 411 forms a concave structure 412, the concave structure 412 penetrates the entire stop portion 41 along the axial direction, and may penetrate along a direction parallel to the axial direction (such as when the stop portion 41 is a straight cylindrical structure), or may penetrate along an oblique and axial direction (such as when the stop portion is a conical cylindrical structure), the convex structure 411 is formed by an inner annular surface and an outer annular surface of the annular structure protruding towards a direction away from the inner tube 20 at the same time, the concave structure 412 is formed by an inner annular surface and an outer annular surface of the annular structure simultaneously recessed towards a direction close to the inner tube 20, as shown in fig. 8, the cross section of the stop portion 41 is an annular structure similar to a wave shape, the convex structures 411 and the concave structures 412 are continuously and alternately arranged along the circumferential direction, the stopper 41 is either a convex structure 411 or a concave structure 412 in the entire circumferential direction. When the stopper 41 is a straight cylindrical structure, the size of the wave peak of the convex structure 411 from all parts along the axial direction to the axis of the stopper 41 (i.e. the axis of the inner tube 20) is equal, that is, the straight line (or line segment) or tangent plane formed by the wave peak of the convex structure 411 is parallel to the axis of the stopper 41; when the stopper 41 is a tapered cylindrical structure, the straight line or tangent plane formed by the peaks of the protrusion 411 forms an angle with the axis of the stopper 41. It should be noted that, in this embodiment, in the axial projection along the inner tube 20, the outer contours of the fixing portions 42 are all located inside the contour formed by the valley bottoms of the recessed structures 412, that is, the fixing portions 42 do not extend beyond the recessed structures 412, and when the connecting portions 43 are provided, the outer contours of the connecting portions 43 are also located inside the contour formed by the valley bottoms of the recessed structures 412.
When the stopper 41 is a straight cylindrical structure, the dimension from each point of the wave crest of the convex structure 411 to the axis of the stopper 41 in the axial direction is equal, that is, the dimension from each point of the wave trough of the concave structure 412 to the axis of the stopper 41 in the axial direction is parallel, that is, the dimension from each point of the wave trough of the concave structure 412 to the axis of the stopper 41 in the axial direction is equal, that is, the dimension from each point of the wave trough of the concave structure 412 is parallel to the axis of the stopper 41. When the stopper 41 is a cone-cylinder-shaped structure, the size of each peak of the convex structure 411 in the axial direction to the axis of the stopper 41 is gradually changed, that is, the size of each peak of the convex structure 411 in the axial direction to the axis of the stopper 41 is gradually changed, and similarly, the size of each valley of the concave structure 412 in the axial direction to the axis of the stopper 41 is gradually changed, that is, the size of each peak of the concave structure 412 in the axial direction to the axis of the stopper 41 in the axial direction to the straight line (or the line segment) or the tangent plane of the concave structure 412 in the axial direction to the axis of the stopper 41 is obliquely changed. It should be noted that the straight tube section 413 is not a circular ring in cross-section, and the tapered tube section 414 is not a circular ring in cross-section, both having the raised structure 411 and the recessed structure 412 in the circumferential direction.
By arranging the cross section of the stopping part 41 to be the wavy structure with the convex structures 411 and the concave structures 412, on one hand, the stopping part 41 has certain radial elastic force, so that radial compression can be realized, and each of the convex structure 411 and the concave structure 412 thereof are connected with each other in the circumferential direction, so that the stopper portions 41 are mutually influenced in the compression process, the compression state or the free state, to a certain extent, the single convex structure 411 or the concave structure 412 is prevented from freely shaking in a large angle, in this way, the stopping part 41 can keep a stable structure when not being subjected to the action of large external force, and the conveying device has higher stability in the conveying process, before entering a patient or in the conveying process in the body of the patient, so that the limiting precision of the artificial valve or the stent in the conveying process can be greatly improved; and this configuration allows the inflation medium to pass from the proximal region of the inflatable balloon 30 to the intermediate and distal regions via the indentations 412, i.e., the configuration increases the gap between the inflatable balloon 30 in the compressed state and the outer peripheral edge of the stop, thereby allowing the inflation medium to more rapidly enter the various regions of the inflatable balloon 30.
The wave crests of the convex structures 411 on the same cross section of the stopper 41 are located on the same circumference, and the valley bottoms of the concave structures 412 are located on the same circumference, at this time, the profile formed by the wave crests of the convex structures 411 is the circumference, and the profile formed by the valley bottoms of the concave structures 412 is the circumference; the protruding direction of each protruding structure 411 may be a radial direction of the stopper 41. The cross section is a cross section perpendicular to the axial direction, that is, the structure is adopted, so that the radial elastic force of the whole stopping part 41 is basically equal at all positions in the circumferential direction, the stopping part 41 is easy to control and the radial compression is easier to realize in the process of installing the inner tube 20 on the inflatable balloon 30 and installing the artificial valve or the stent on the inflatable balloon 30.
With continued reference to fig. 8, the protruding structure 411 may be an inverted V-shaped structure, a semicircular structure, an arc-shaped ring structure, an n-shaped structure, etc., the recessed structure 412 may be a V-shaped groove, a semicircular groove, an arc-shaped groove, a U-shaped groove, etc., and the shapes of the protruding structure 411 and the recessed structure 412 may be freely combined. The included angle of the protrusion structure 411 at the peak and the included angle of the V-shaped groove at the bottom of the groove may be equal or unequal, preferably, the former is smaller than the latter, that is, the angle at which two sides of the V-shaped groove diverge is larger, and the included angle formed by two adjacent side walls of two adjacent V-shaped grooves is smaller, so that when the stopper 41 is subjected to radial extrusion force, the concave structure 412 can provide a larger deformation space for the deformation of the protrusion structure 411, thereby making the protrusion structure 41 more easily realize radial compression, further facilitating the insertion of the inner tube 20 into the inflatable balloon 30, and facilitating the installation of the artificial valve or stent in the accommodation space; and by adopting the structure, the distance between the bottoms of the two adjacent V-shaped grooves is larger, so that the stability of the V-shaped structure is better, and the V-shaped structure has better limiting effect.
When the raised structures 411 are sharp at the peaks, the inflatable balloon 30 may be scratched or even broken during insertion of the inner tube 20 and during installation of the prosthetic valve or stent, and preferably the raised structures 411 are curved at the peaks. The groove bottom of the V-shaped groove can also be provided with an arc structure or other smooth transition structures. The recessed feature 412 may also be provided as an arcuate feature or other smooth transition feature at the trough. When the stopping portion 41 includes the convex structure 411, the first fluid channel 44 may be located on the convex structure 411, or may be located on the concave structure 412, preferably the former, as shown in fig. 1 and 6, which is particularly suitable for the stopping portion 41 having a tapered cylindrical structure, and especially, the stopping portion 41 of the first stopper 40 is in such a manner that, when the stopping portion 41 has a petal-shaped structure as a whole, the inflation medium can flow to the middle region and the distal region of the inflatable balloon 30 through the concave structure 412 of the first stopper 40, so that, when the first fluid channel 44 is disposed on the convex structure 411, fluid channels can be formed on both the convex structure 411 and the concave structure 412, and further, the time for the inflation medium to reach each region of the inflatable balloon 30 is shortened as much as possible, and the uniformity of the inflation is improved. When the stopper 41 is in a straight cylindrical structure, the wall thickness of the stopper inside the concave structure 412 can also be increased, that is, the annular structure includes a support ring located at the inner ring, a convex structure 411 and a concave structure 412 located at the outer side of the support ring, for example, the annular structure includes two parts arranged radially, one part located at the inner side is in a cylindrical structure (i.e., the support ring), and the other part located at the outer side includes the convex structure 411 and the concave structure 412, and at this time, the first fluid channel 44 can be arranged on the support ring.
When the stopper 41 includes the convex structure 411, if the first stopper 40 is provided with the second fluid channel 45, it is preferable that the second fluid channel 45 is partially disposed on the concave structure 412, and considering that the concave structure 412 is closer to the fixing portion 42 relative to the convex structure 411 in the radial direction, and the portion of the second fluid channel 45 located on the stopper 41 is disposed on the concave structure 412, as shown in fig. 4, it is possible to reduce the wall thickness of the stopper 41, and to make the outer diameter of the fixing portion 42 not need to be set too large.
It should be noted that, no matter what structure is adopted for the stopping part 41, in the axial direction of the inner tube 20, the projections of the two end walls of the two prosthetic valves or stents respectively have at least overlapping areas with the projections of the ends of the stopping parts 41 adjacent to the two end walls, if the projection of the end surface of the prosthetic valve or stent close to the first stopper 40 is the first projection, the projection of the end surface close to the second stopper 50 is the second projection, the projection of the end surface of the stopping part 41 of the first stopper 40 is the third projection, and the projection of the end surface of the stopping part 41 of the second stopper 50 is the fourth projection, then the first projection and the third projection have occasion areas, the second projection and the fourth projection have overlapping areas, for example, when the end part of the outer annular surface at least partially exceeds the inner wall of the prosthetic valve or stent in the compressed state, when all the parts of the end part of the outer annular surface in the circumferential direction exceed the outer wall of the prosthetic valve or stent in the compressed state, the end of the inner annular surface extends at least partially beyond the inner wall of the valve or stent in the compressed state, thus preventing the valve or stent from entering the inner space of the stop 41.
Specifically, the fixing portion 42 and the inner tube 20 may be connected by inserting, in a preferred embodiment, the fixing portion 42 is provided with a fabrication hole 421 that penetrates radially, that is, the fabrication hole 421 penetrates from an outer wall of the fixing portion 42 to an inner wall thereof, when the stopper (including the first stopper 40 and the second stopper 50) and the inner tube 20 are inserted in place, the fixing portion 42 and the inner tube 20 may be fixed by adhering by dispensing to the fabrication hole, so as to improve the reliability of connection between the stopper and the inner tube 20. Further, a plurality of process holes 421 may be provided along the axial direction of the fixing portion 42, or one, two, or more process holes may be provided along the circumferential direction of the fixing portion 42. The fixing portion 42 may be connected to the inner tube 20 by heat fusion or the like.
Referring to fig. 2, the cross-section of the guide member 60 gradually increases from the distal end to the proximal end, and specifically, the guide member 60 may have a conical structure (i.e., the generatrix is a straight line), a conical structure with an arc-shaped generatrix, or a hyperbolic or other curved or broken line structure to guide the delivery of the delivery device in the patient. In the axial projection of the inner tube 20, the outer contour of the guide 60 is located within the outer contour of the stop 41, and when the recess 412 is provided, preferably within the outer contour of the recess 412. Specifically, the guide 60 may be mounted directly to the distal end of the inner tube 20, two stops are located between the guide 60 and the distal end of the outer tube 10, and the distal end of the inflatable balloon 30 may be sleeved on the outer wall of the guide 60. The guiding element 60 may also be inserted into the second stopper 50 or directly contact with the end surface, and when the guiding element 60 is inserted into the fixing portion 42 of the second stopper 50, the inflatable balloon 30 is sleeved on the outer wall of the fixing portion 42; or the fixing part 42 is inserted into the guide 60, and the inflatable balloon 30 is sleeved on the outer wall of the guide 60; in the case of an end-face contact connection, the proximal end face of guide 60 may be in contact with the end face of anchor 42, and inflatable balloon 30 may be attached to guide 60, or to the outer wall of anchor 42, or to both the outer wall of guide 60 and the outer wall of anchor 42. The inner tube 20 may extend only to the fixing portion 42 of the second stopper 50 or may extend to the guide 60, regardless of the insertion connection or the end-face contact connection.
When the guide 60 is connected to the second stop 50, the axial stability of the second stop 50 relative to the inner tube 20 can also be increased, thereby further improving the reliability of the second stop 50 in positioning the prosthetic valve or stent.
In the embodiment in which the guide 60 and the fixing portion 42 are connected by insertion, a radially penetrating process hole is also provided in one of the outer sides of the overlapping region, and after the two are inserted and mounted, the two can be connected by dispensing through the process hole.
The delivery device further comprises a visualization component, which can be disposed on the inner tube 20 or the first stopper 40 and the second stopper 50, or can be disposed on other components to facilitate the operator to observe the delivery condition of the prosthetic valve or the stent in the patient.
With continued reference to fig. 1, the delivery system further comprises an operating handle 70, an adjustable elbow connection tube 80 extending from a distal end of the operating handle 70, and a tee 90, the proximal ends of the outer tube 10 and the inner tube 20 being in tee 90 connection such that the inflation medium enters the annular cavity between the outer tube 10 and the inner tube 20 through the tee, the distal end extending from the proximal end of the operating handle 70 and through the distal end of the adjustable elbow connection tube 80; the operating handle 70 can adjust the curvature of the distal end portion of the elbow-adjustable connecting tube 80, and can also adjust the relative positions of the outer tube 10, the inner tube 20, and the inflatable balloon 30 with respect to the elbow-adjustable connecting tube 80, so as to precisely adjust the position of the prosthetic valve or stent into the patient.
In the present invention, the axes of the first stopper 40 and the second stopper 50, the axis of the stopper, the axis of the fixing portion, and the axis of the inner tube 20 may be considered to be the same axis, and the above-mentioned axial direction also refers to the direction in which the same axis is located. And although the radial and radial dimensions are described in many places above, the utility model is not limited to that the components corresponding to the radial and radial dimensions must be cylindrical structures, conical structures, etc., and merely represent the dimensions in the direction perpendicular to the axial direction or in that direction.
It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the utility model.
Claims (10)
1. A stopper for an interventional delivery device, which is used for delivering a prosthetic valve or a stent to the body of a patient, comprises an outer tube (10), an inner tube (20) penetrating through the distal end of the outer tube (10), an inflatable balloon (30), and two stoppers which are positioned in the inflatable balloon (30) and fixed to the inner tube (20) at intervals, wherein a part of the inflatable balloon (30) between the two stoppers and the two stoppers enclose an accommodating space for accommodating the prosthetic valve or the stent in a contracted state; it is characterized in that the preparation method is characterized in that,
the stopper comprises a fixing part (42) used for being connected with the inner tube (20) in a plug-in mode and a stopping part (41) used for limiting the position of the artificial valve or the stent, the stopping part (41) is of a circumferentially closed annular structure, and the maximum radial dimension from the outer edge of at least one end of the stopping part to the axis of the fixing part is larger than the radius of the fixing part;
the side wall of the stopper is provided with a fluid channel, the fluid channel is at least positioned at the stopping part (41), and the fluid channel penetrates through the stopping part (41) in the axial direction of the fixing part (42) or penetrates from one end, far away from the fixing part (42), of the stopping part (41) to one end, far away from the stopping part (41), of the fixing part (42).
2. Stopper according to claim 1, wherein said stop portion (41) is of a straight cylindrical configuration, said fluid passage being non-perpendicular to the axis of said fixing portion (42).
3. Flight according to claim 2, characterized in that the fluid channel comprises a first fluid channel (44) at the stop portion (41), the first fluid channel (44) passing through from one end face to the other end face of the stop portion (41) remote from the fixing portion (42).
4. Flight according to claim 2, characterized in that the fluid channel comprises a second fluid channel (45) passing through the stop portion (41) and the fixing portion (42), the axis of the second fluid channel (45) being arranged obliquely with respect to the axis of the fixing portion (42) and being situated at one end of the stop portion (41) farther from the axis of the fixing portion (42) than the other end.
5. Stopper according to claim 2, characterised in that it further comprises a connecting portion in the form of a conical tube, the large diameter end of which is connected to the stop portion (41) and the small diameter end is connected to the fixing portion (42).
6. Stopper according to claim 1, wherein said stop portion (41) presents a conical cylindrical structure, the small end of said stop portion (41) being connected to said fixing portion (42); the fluid passage includes a first fluid passage (44) at the stopper portion (41), and the first fluid passage (44) penetrates from an inner wall surface to an outer wall surface of the stopper portion (41).
7. The stop according to claim 6, wherein the axis of the first fluid channel (44) is parallel to the axis of the fixed portion (42); or the axis of the first fluid channel (44) is arranged obliquely relative to the axis of the fixing part (42), and one end of the first fluid channel, which is positioned on the inner wall surface, is far away from the axis of the fixing part (42) than the other end.
8. Stopper as in claim 1, characterized in that it is provided circumferentially with a plurality of said fluid channels.
9. Stopper according to any one of claims 1 to 7, wherein the annular structure comprises a plurality of raised structures (411) arranged along the circumferential direction, the recessed area between two adjacent raised structures (411) forming a recessed structure (412), the raised structures (411) being formed by the inner and outer annular surfaces of the annular structure being simultaneously raised away from the axis of the fixed portion (42), and the recessed structure (412) being formed by the inner and outer annular surfaces of the annular structure being simultaneously recessed towards the axis of the fixed portion (42).
10. An interventional delivery device for delivering a prosthetic valve or stent into a patient; characterized in that it comprises a stopper according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122253298.5U CN216495868U (en) | 2021-09-16 | 2021-09-16 | Blocking piece for intervention type conveying device and intervention type conveying device |
| PCT/CN2022/093960 WO2023040323A1 (en) | 2021-09-16 | 2022-05-19 | Prosthetic valve delivery system, stopper, and interventional delivery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122253298.5U CN216495868U (en) | 2021-09-16 | 2021-09-16 | Blocking piece for intervention type conveying device and intervention type conveying device |
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| Publication Number | Publication Date |
|---|---|
| CN216495868U true CN216495868U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122253298.5U Active CN216495868U (en) | 2021-09-16 | 2021-09-16 | Blocking piece for intervention type conveying device and intervention type conveying device |
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| CN (1) | CN216495868U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023040321A1 (en) * | 2021-09-18 | 2023-03-23 | 上海纽脉医疗科技股份有限公司 | Prosthetic valve delivery system, blocking pieces and interventional medical apparatus |
| WO2023040323A1 (en) * | 2021-09-16 | 2023-03-23 | 上海纽脉医疗科技股份有限公司 | Prosthetic valve delivery system, stopper, and interventional delivery device |
| WO2023040320A1 (en) * | 2021-09-16 | 2023-03-23 | 上海纽脉医疗科技股份有限公司 | Prosthetic valve delivery system and stop device and stop member therefor |
-
2021
- 2021-09-16 CN CN202122253298.5U patent/CN216495868U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023040323A1 (en) * | 2021-09-16 | 2023-03-23 | 上海纽脉医疗科技股份有限公司 | Prosthetic valve delivery system, stopper, and interventional delivery device |
| WO2023040320A1 (en) * | 2021-09-16 | 2023-03-23 | 上海纽脉医疗科技股份有限公司 | Prosthetic valve delivery system and stop device and stop member therefor |
| WO2023040321A1 (en) * | 2021-09-18 | 2023-03-23 | 上海纽脉医疗科技股份有限公司 | Prosthetic valve delivery system, blocking pieces and interventional medical apparatus |
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