Valve stent conveying device

Abstract

The invention provides a valve stent conveying device, and relates to the technical field of medical equipment. One end of the pressing and holding pipe is fixedly connected with one end of the conveying pipe; the first limiting piece and the second limiting piece are fixed to the periphery of the first position and the periphery of the second position of the outer surface of the pressing and holding pipe respectively, and a first area, between the first limiting piece position and the second limiting piece position, of the pressing and holding pipe is used for limiting a valve support; the balloon is arranged in the first area in a sleeving mode, and the balloon is used for releasing the valve support. According to the embodiment of the invention, shaking of the valve stent can be reduced, and then the risk of heart valve implantation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a valve stent delivery device. Background Art

[0002] As the aging population worsens, the incidence of heart diseases is also increasing. To achieve the treatment of such diseases, artificial heart valves are usually implanted. In the related art, the valve stent is compressed to a delivery device, which delivers the valve stent to the target position. However, in the related art, during the delivery of the valve stent, there is shaking caused by the unstable connection between the valve stent and the delivery device, which causes the position of the valve stent to change or even detach, resulting in a higher risk of heart valve implantation.

[0003] It can be seen that the related technology has the problem of high risk caused by the shaking of the valve stent during the heart valve implantation process. Summary of the invention

[0004] An embodiment of the present invention provides a valve stent delivery device to solve the problem in the related art that the valve stent shakes during the heart valve implantation process, resulting in a high risk.

[0005] To achieve the above-mentioned object, an embodiment of the present invention provides a valve stent delivery device, comprising:

[0006] Delivery pipe;

[0007] A gripping tube, one end of which is fixedly connected to one end of the delivery tube;

[0008] A first stopper and a second stopper, wherein the first stopper and the second stopper are respectively fixed to the periphery of a first position and a second position of the outer surface of the crimping tube, and a first area between the first stopper position and the second stopper position of the crimping tube is used to limit the valve stent;

[0009] A balloon is sleeved on the first area and is used to release the valve stent.

[0010] In one embodiment, the diameter of the first limiting member increases along a direction approaching the second limiting member; and / or the diameter of the second limiting member increases along a direction approaching the first limiting member.

[0011] In one embodiment, the first limiting member is a hollow structure, and / or the second limiting member is a hollow structure.

[0012] In one embodiment, the hollow structure of the first stopper is conical, and the inner diameter of the first stopper increases in a direction approaching the second stopper; and / or,

[0013] The hollow structure of the second limiting member is conical, and the inner diameter of the second limiting member increases along a direction approaching the first limiting member.

[0014] In one embodiment, a support mesh skeleton mechanism is disposed on the inner surface of the first limiting member, and / or a support mesh skeleton mechanism is disposed on the inner surface of the second limiting member.

[0015] In one embodiment, the delivery tube comprises:

[0016] An inner tube, wherein the inner tube is a hollow structure, and the crimping tube is sleeved in the second area of ​​the inner tube;

[0017] The outer tube is sleeved in the third area of ​​the inner tube, the grip tube is fixedly connected to one end of the outer tube, and the second area is adjacent to the third area.

[0018] In one embodiment, the second end of the inner tube is provided with a tip, and the diameter of the tip increases along a direction approaching the inner tube.

[0019] In one embodiment, an infusion channel is formed between the inner tube and the outer tube, and the valve stent delivery device also includes an infusion piece, which is connected to the first end of the infusion channel, and the balloon is connected to the second end of the infusion channel.

[0020] In one embodiment, a guide wire is provided in the inner tube;

[0021] The valve stent delivery device also includes an adjustment handle. An end of the outer tube away from the crimping tube is sleeved with a stress dispersion tube, and the adjustment handle is connected to the stress dispersion tube.

[0022] In one embodiment, a connecting seat is further included, which is connected to the end of the outer tube away from the crimping tube. The connecting seat is provided with a first channel and a second channel. The first channel is used to connect the infusion piece, and the second channel is used to pass the guide wire.

[0023] One of the above technical solutions has the following advantages or beneficial effects:

[0024] In an embodiment of the present invention, a valve stent delivery device includes: a delivery tube; a grip tube, one end of which is fixedly connected to one end of the delivery tube; a first stopper and a second stopper, the first stopper and the second stopper are respectively fixed to the first position and the second position of the outer periphery of the grip tube, and the first area between the first stopper position and the second stopper position of the grip tube is used to limit the valve stent; a balloon, the balloon is sleeved in the first area, and the balloon is used to release the valve stent. In this way, the first stopper and the second stopper are used to limit the valve stent during the implantation of the valve stent, thereby reducing the shaking of the valve stent and the risk of implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0026] Figure 1 This is one of the structural schematic diagrams of the valve stent delivery device provided in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a crimping tube, a first limiting member, and a second limiting member provided in an embodiment of the present invention;

[0028] Figure 3 This is the second structural schematic diagram of the valve stent delivery device provided by the embodiment of the present invention;

[0029] Figure 4 This is the third structural schematic diagram of the valve stent delivery device provided by an embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of an outer tube, a first channel and a second channel provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 5 As shown, an embodiment of the present invention provides a valve stent delivery device, comprising:

[0033] Delivery pipe 10;

[0034] A crimping tube 20, one end of which is fixedly connected to one end of the delivery tube 10;

[0035] A first stopper 30 and a second stopper 31, wherein the first stopper 30 and the second stopper 31 are respectively fixed to the first position and the second position of the outer surface of the crimping tube 20, and a first area between the first stopper 30 and the second stopper 31 of the crimping tube 20 is used to limit the valve stent;

[0036] The balloon 40 is sleeved on the first area and is used to release the valve stent.

[0037] In which, during the process of conveying the valve stent, the valve stent is fixed in the first area, and the first limiting member 30 and the second limiting member 31 respectively limit the two ends of the valve stent; after the valve stent conveying device moves to the area to be released, the balloon 40 expands, and the expanded balloon 40 squeezes the valve stent to release the valve stent.

[0038] The delivery tube 10 is made of a flexible material so that the delivery tube 10 can change shape during the delivery of the valve stent to achieve movement of the valve stent delivery device within the blood vessel.

[0039] The gripping tube 20 is used to fix the first stopper 30 and the second stopper 31, and to sleeve the balloon 40. Figure 2 In some embodiments, the delivery tube 10 includes an outer tube 101 , and the crimping tube 20 and the outer tube 101 can be integrally formed.

[0040] The first limit member 30 and the second limit member 31 are respectively fixed at the first position and the second position of the crimping tube 20. The area between the first position and the second position is the first area. The distance of the first area is determined according to the length of the valve stent to be loaded, so that when the valve stent is loaded in the first area, the two ends of the valve stent are respectively abutted against the first limit member 30 and the second limit member 31 to reduce the shaking of the valve stent during implantation.

[0041] In some embodiments, the length of the first region is greater than or equal to the length of the valve stent. Further, when the length of the first region is greater than the length of the valve stent, the difference between the length of the first region and the length of the valve stent is less than a set threshold. In this way, by setting a threshold to limit the length of the first region relative to the valve stent, after the valve stent is loaded into the first region, the first stopper 30 and the second stopper 31 can effectively limit the valve stent.

[0042] The balloon 40 is used to release the valve stent. Before releasing the valve stent, the balloon 40 is sleeved on the first area to compress the valve stent to be transported so as to be loaded onto the outer surface of the balloon 40, so that during the implantation of the valve stent, the valve stent can be released by expanding the balloon 40.

[0043] The balloon 40 may be made of a high molecular material, such as nylon 12. The high molecular material enables the balloon 40 to have good elasticity and pressure resistance, thereby allowing the balloon 40 to expand and contract.

[0044] In an embodiment of the present invention, a valve stent delivery device includes: a delivery tube 10; a grip tube 20, one end of which is fixedly connected to one end of the delivery tube 10; a first stopper 30 and a second stopper 31, which are respectively fixed to the first position and the second position of the outer periphery of the grip tube 20, and the first area between the first stopper 30 and the second stopper 31 of the grip tube 20 is used to limit the valve stent; a balloon 40, which is sleeved in the first area and is used to release the valve stent. In this way, the first stopper 30 and the second stopper 31 are used to limit the valve stent during the implantation of the valve stent, thereby reducing the shaking of the valve stent and the risk of implantation.

[0045] In one embodiment, the diameter of the first limiting member 30 increases along a direction approaching the second limiting member 31 ; and / or the diameter of the second limiting member 31 increases along a direction approaching the first limiting member 30 .

[0046] It should be noted that during the process of implanting the valve stent, the first limiter 30 and the second limiter 31 may contact the inner wall of the blood vessel. The first limiter 30 and / or the second limiter 31 need to be set as a conical structure to reduce the damage to the blood vessel caused by the first limiter 30 and the second limiter 31 when they contact the blood vessel.

[0047] In some embodiments, during the implantation of the valve stent, the first limiter 30 is located at the front end of the implantation direction, and the first limiter 30 is in contact with the inner wall of the blood vessel. The first limiter 30 is set to a conical structure, so that when the first limiter 30 is in contact with the inner wall of the blood vessel, the inner wall of the blood vessel can be slowly expanded, thereby reducing damage to the inner wall of the blood vessel.

[0048] The first position-limiting member 30 is configured as a conical structure, and specifically, the diameter of the first position-limiting member 30 increases along a direction approaching the second position-limiting member 31 .

[0049] In some embodiments, when the valve stent delivery device is implanted and withdrawn from the body, the second limiter 31 is located at the front end of the withdrawal direction. At this time, the second limiter 31 contacts the inner wall of the blood vessel. The second limiter 31 is set to a conical structure so that when the second limiter 31 contacts the inner wall of the blood vessel, the inner wall of the blood vessel can be slowly expanded, thereby reducing damage to the inner wall of the blood vessel.

[0050] The second position-limiting member 31 is configured as a conical structure, and specifically, the diameter of the second position-limiting member 31 increases along a direction approaching the first position-limiting member 30 .

[0051] In some embodiments, in addition to the above-mentioned method of setting the first limit member 30 and / or the second limit member 31 as a conical structure, the first limit member 30 and / or the second limit member 31 can also be set to an arc shape, wherein the diameter of the first limit member 30 close to the second limit member 31 is larger than the diameter of the first limit member 30 on the side away from the second limit member 31; the diameter of the second limit member 31 close to the first limit member 30 is larger than the diameter of the second limit member 31 on the side away from the first limit member 30.

[0052] In this way, the diameter of the first limit member 30 on the side close to the second limit member 31 is larger than the diameter of the first limit member 30 on the side away from the second limit member 31, so as to reduce the damage caused to the inner wall of the blood vessel by the first limit member 30 during the implantation process; similarly, the diameter of the second limit member 31 on the side close to the first limit member 30 is larger than the diameter of the second limit member 31 on the side away from the first limit member 30, so as to reduce the damage caused to the inner wall of the blood vessel by the first limit member 30 during the withdrawal process.

[0053] In one embodiment, the first limiting member 30 is a hollow structure, and / or the second limiting member 31 is a hollow structure.

[0054] It should be noted that the valve stent is a structure composed of multiple rhombus-shaped units. After the valve stent is compressed, the valve stent will be slightly elongated in the axial direction and will recover after the valve stent is released. In order to adapt to the deformation of the valve stent, in the embodiment of the present invention, the first stopper 30 is set as a hollow structure, and / or the second stopper 31 is set as a hollow structure, so that the two ends of the valve stent are located in the hollow structure after being compressed.

[0055] In one embodiment, the hollow structure of the first stopper 30 is conical, and the inner diameter of the first stopper 30 increases along a direction approaching the second stopper 31; and / or,

[0056] The hollow structure of the second limiting member 31 is conical, and the inner diameter of the second limiting member 31 increases along a direction approaching the first limiting member 30 .

[0057] It should be noted that after the valve stent is compressed, the two ends on the axis extend into the hollow structure. In order to enable the valve stent to expand more smoothly when the valve stent is released, after the first limit member 30 is set as a hollow structure, and / or the second limit member 31 is set as a hollow structure, the hollow structure is set to a cone. The cone can reduce the radial resistance when the valve stent is released.

[0058] Among them, the hollow structure of the first limiter 30 is set to be conical, specifically, the inner diameter of the first limiter 30 is set to increase along the direction approaching the second limiter 31; the hollow structure of the second limiter 31 is set to be conical, specifically, the inner diameter of the second limiter 31 is set to increase along the direction approaching the first limiter 30.

[0059] In some embodiments, in addition to the above-mentioned method of setting the hollow structure of the first limit member 30 and / or the second limit member 31 to a cone, the hollow structure of the first limit member 30 and / or the second limit member 31 can also be set to an arc shape, wherein the inner diameter of the first limit member 30 increases in a direction approaching the second limit member 31, and the inner diameter of the second limit member 31 increases in a direction approaching the first limit member 30.

[0060] In this way, the inner diameter of the first limiter 30 increases in the direction approaching the second limiter 31, and the inner diameter of the second limiter 31 increases in the direction approaching the first limiter 30. The arc shape can reduce the radial resistance when the valve stent is released.

[0061] In one embodiment, a support mesh frame mechanism is disposed on the inner surface of the first limiting member 30 , and / or a support mesh frame mechanism is disposed on the inner surface of the second limiting member 31 .

[0062] In an embodiment of the present invention, a supporting mesh skeleton mechanism is provided on the inner surface of the first limiting member 30, and the strength of the first limiting member 30 is increased by the supporting mesh skeleton mechanism to avoid damage to the first limiting member 30 during the implantation process; and / or, a supporting mesh skeleton mechanism is provided on the inner surface of the second limiting member 31, and the strength of the second limiting member 31 is increased by the supporting mesh skeleton mechanism to avoid damage to the second limiting member 31 during the implantation process.

[0063] In one embodiment, Figure 3 and Figure 4 As shown, the delivery pipe 10 comprises:

[0064] The inner tube 102 is a hollow structure, and the grip tube 20 is sleeved in the second area of ​​the inner tube 102;

[0065] The outer tube 101 is sleeved in the third area of ​​the inner tube 102, the crimping tube 20 is fixedly connected to one end of the outer tube 101, and the second area is adjacent to the third area.

[0066] In an embodiment of the present invention, the delivery tube 10 includes two parts, an inner tube 102 and an outer tube 101. Liquid is injected through the infusion channel between the inner tube 102 and the outer tube 101 to expand the balloon 40. The outer tube 101 is used to support and protect the inner tube 102. The inner tube 102 and the outer tube 101 are combined to form the delivery tube 10, so that the valve stent release function of the valve stent delivery device is realized while protecting the device.

[0067] It should be noted that since liquid is injected into the balloon 40 through the infusion channel, the length of the second area of ​​the inner tube 102 is greater than the length of the crimping tube 20, so that after the crimping tube 20 is sleeved on the first area, the balloon 40 can be connected to the infusion channel to inject liquid into the balloon 40.

[0068] In one embodiment, the valve stent delivery device also includes an infusion piece, an infusion channel is formed between the inner tube 102 and the outer tube 101, and the valve stent delivery device also includes an infusion piece, the infusion piece is connected to the first end of the infusion channel, and the balloon is connected to the second end of the infusion channel.

[0069] In some embodiments, the inner tube 102 includes an inner layer, a middle layer and an outer layer, wherein the inner wall of the inner layer is a smooth inner wall to facilitate the passage of the guide wire and the expansion of the balloon 40; the middle layer is used to provide support and strength; the outer layer is coated with a special material to improve the lubricity and anti-thrombotic properties of the catheter.

[0070] In some embodiments, the material of the outer tube 101 is preferably polyether block amide to improve the strength of the outer tube 101 .

[0071] In one embodiment, a tip 50 is disposed at the second end of the inner tube 102 , and a diameter of the tip 50 increases along a direction approaching the inner tube 102 .

[0072] During the process of valve stent implantation, the valve stent delivery device needs to be introduced into the blood vessel. Since the blood vessel is narrow, in order to reduce the damage to the inner wall of the blood vessel during the implantation of the valve stent delivery device, in an embodiment of the present invention, a tip 50 is provided at the second end of the inner tube 102. The diameter of the tip 50 increases in the direction approaching the inner tube 102, so that when the valve stent delivery device is implanted, the inner wall of the blood vessel can be separated by the tip 50, thereby facilitating the catheter to pass through the blood vessel and the heart valve smoothly and reducing damage to the tissue.

[0073] Furthermore, the tip 50 may be made of a soft material, such as an elastic material, to reduce the possibility of the tip 50 scratching the inner wall of the blood vessel, thereby further reducing damage to the tissue.

[0074] In one embodiment, a guide wire is disposed in the inner tube 102;

[0075] The valve stent delivery device further comprises an adjustment handle. A stress dispersion tube 60 is sleeved on one end of the outer tube 101 away from the crimping tube 20 , and the adjustment handle is connected to the stress dispersion tube 60 .

[0076] It should be noted that, due to the curved distribution of blood vessels in the body, the advancing direction of the valve stent delivery device needs to be changed so that the valve stent delivery device can pass through the blood vessels and enter the position of the heart valve.

[0077] In an embodiment of the present invention, a guide wire is provided in the inner tube 102, and the valve stent delivery device is also provided with an adjustment handle. The inner tube 102 is bent by the guide wire, and the bending of the outer tube 101 can be controlled by the adjustment handle, thereby changing the forward direction of the valve stent delivery device, so that the valve stent delivery device can pass through the blood vessels and enter the heart valve position.

[0078] Among them, the adjustment handle includes a bending wire and a screw rod, and the bending wire is selected and adjusted by the screw rod to achieve the required bending angle of the control tube body.

[0079] The stress dispersion tube 60 is used to disperse the stress of the outer tube 101 to avoid damage to the outer tube 101 during the bending process.

[0080] In one embodiment, Figure 5 As shown, it also includes a connecting seat 70, which is connected to the end of the outer tube 101 away from the crimping tube 20. The connecting seat 70 is provided with a first channel 1011 and a second channel 1012. The first channel 1011 is used to connect the infusion piece, and the second channel 1012 is used to pass the guide wire.

[0081] In the embodiment of the present invention, a connection base 70 is further included, and the connection base 70 is connected to the end of the outer tube 101 away from the crimping tube 20, and the connection base 70 is provided with a first channel 1011 and a second channel 1012, wherein the first channel 1011 is used to connect the infusion component, and the second channel 1012 is used to pass the guide wire. In this way, by connecting the first channel 1011 with the infusion component, the infusion component can infuse fluid into the infusion channel through the first channel 1011, thereby expanding the balloon 40; by passing the guide wire through the second channel 1012, the guide wire can pass through the second channel 1012 and the inner tube 102, thereby adjusting the inner tube 102.

[0082] Furthermore, the stress dispersion tube 60 and the connection seat 70 are preferably made of silicone rubber and polycarbonate materials.

[0083] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0084] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A valve stent delivery device, characterized in that: include: Delivery pipe; A gripping tube, one end of which is fixedly connected to one end of the delivery tube; A first limiting member and a second limiting member, wherein the first limiting member and the second limiting member are respectively fixed to a first position and a second position of the outer surface of the crimping tube, and a first area between the first position and the second position of the crimping tube is used to limit the valve stent; A balloon is sleeved on the first area and is used to release the valve stent.

2. The valve stent delivery device according to claim 1, characterized in that: The diameter of the first limiting member increases along a direction approaching the second limiting member; and / or the diameter of the second limiting member increases along a direction approaching the first limiting member.

3. The valve stent delivery device according to claim 2, characterized in that: The first limiting member is a hollow structure, and / or the second limiting member is a hollow structure.

4. The valve stent delivery device according to claim 3, characterized in that: The hollow structure of the first stopper is conical, and the inner diameter of the first stopper increases in a direction approaching the second stopper; and / or, The hollow structure of the second limiting member is conical, and the inner diameter of the second limiting member increases along a direction approaching the first limiting member.

5. The valve stent delivery device according to claim 3, characterized in that: The inner surface of the first limiting member is provided with a supporting net skeleton mechanism, and / or the inner surface of the second limiting member is provided with a supporting net skeleton mechanism.

6. The valve stent delivery device according to any one of claims 1 to 5, characterized in that: The delivery pipe comprises: An inner tube, wherein the inner tube is a hollow structure, and the crimping tube is sleeved in the second area of ​​the inner tube; The outer tube is sleeved in the third area of ​​the inner tube, the grip tube is fixedly connected to one end of the outer tube, and the second area is adjacent to the third area.

7. The valve stent delivery device according to claim 6, characterized in that: The second end of the inner tube is provided with a tip, and the diameter of the tip increases along a direction approaching the inner tube.

8. The valve stent delivery device according to claim 6, characterized in that: An infusion channel is formed between the inner tube and the outer tube. The valve stent delivery device also includes an infusion piece, which is connected to a first end of the infusion channel, and the balloon is connected to a second end of the infusion channel.

9. The valve stent delivery device according to claim 6, characterized in that: A guide wire is arranged inside the inner tube; The valve stent delivery device also includes an adjustment handle. An end of the outer tube away from the crimping tube is sleeved with a stress dispersion tube, and the adjustment handle is connected to the stress dispersion tube.

10. The valve stent delivery device according to claim 6, characterized in that: It also includes a connecting seat, which is connected to the end of the outer tube away from the crimping tube. The connecting seat is provided with a first channel and a second channel. The first channel is used to connect the infusion piece, and the second channel is used to pass the guide wire.

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