Implant delivery system

Abstract

The utility model provides an implant conveying system. The implant conveying system comprises an implant and a conveying device, the positioning assembly comprises a balloon and an inner tube, the inner tube comprises a first section and a second section, the first section is located at the far end of the second section, the first section is connected to the balloon, and the second section is configured to bear the implant; the pushing assembly comprises a pushing tube, the pushing tube is arranged on the second section of the inner tube in a sliding and sleeving mode and located at the near end of the implant, and the pushing tube is configured to push the implant to move in the far-end direction. It is guaranteed that the implant accurately enters the designated position through the balloon, and accurate release of the implant is achieved.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an implant delivery system. Background Art

[0002] Femoral / radial artery puncture is a common method for establishing vascular access in interventional procedures. This procedure is typically performed by inserting a hollow needle through the patient's skin and muscle tissue into the vascular system. During the entire procedure, vascular puncture is traumatic, and once the intervention is complete, the vascular access must be appropriately closed or sealed. Vascular complications at the puncture site and during the intraoperative period are a constant challenge for every interventional physician. Currently, methods for hemostasis at the puncture site after femoral artery intervention include manual compression, mechanical compression, and vascular occlusion. Traditional manual compression methods require a long clinical application period. A doctor or nurse applies pressure to the wound until blood coagulation and tissue repair are sufficient to seal the puncture site. This pressure is maintained for at least an hour. This prolonged application of pressure and the resulting bed rest increase the workload and productivity of medical staff while also increasing patient pain. Furthermore, blood escaping from the vessel poses the risk of hematomas, which persist until sufficient clotting occurs at the wound site. Furthermore, external pressure devices used in arterial compression devices are often unsuitable for certain patients, such as those with a large amount of subcutaneous fat tissue, because the skin surface is significantly removed from the vascular puncture site. This can result in inaccurate skin compression and less effective wound healing. Since the mid-1990s, the widespread use of vascular closure devices and various mechanical compression devices has, to a certain extent, shortened postoperative bed rest time and improved patient comfort, but has also inevitably brought some complications.

[0003] The existing technology of vascular occlusion hemostasis still has the following defects:

[0004] 1. Inducing hemostasis by injecting exogenous pharmacological materials into the blood vessels. Once this method is used, the material cannot be removed without surgical intervention. If the material is not properly placed and injected into the blood vessel lumen, complications such as vascular occlusion may occur. If the patient needs to re-puncture the site for various reasons, the site will not provide the ability for the interventional device to re-enter the blood vessel lumen.

[0005] 2. Many existing technologies rely solely on touch to indicate to the doctor the correct placement of the puncture closure device, which is difficult to operate and may require upstream clamping of the blood vessel to reduce the intraluminal pressure at the puncture site to atmospheric pressure, which may damage the blood vessel and cause discomfort to the patient.

[0006] 3. Existing technologies still require medical staff to carry out tedious monitoring continuously.

[0007] 4. Affected by the thickness of the tissue between the skin and the puncture, the existing vascular occlusion device will spread the applied pressure as the distance increases, and cause the release position of the vascular occlusion component to shift. Utility Model Content

[0008] In response to the problems in the prior art, the purpose of this application is to provide an implant delivery system that uses a balloon to ensure that the implant accurately enters the designated position and achieves accurate release of the implant.

[0009] The present invention provides an implant delivery system, comprising:

[0010] implants;

[0011] a positioning assembly comprising a balloon and an inner tube, the inner tube comprising a first section and a second section, the first section being located at a distal end of the second section, the first section being connected to the balloon, and the second section being configured to carry the implant;

[0012] The pushing assembly includes a pushing tube, which is slidably sleeved on the second section of the inner tube and located at the proximal end of the implant. The pushing tube is configured to push the implant toward the distal end.

[0013] In some embodiments, the positioning assembly further comprises an inflation component connected to the inner tube and configured to inflate the balloon through the inner tube.

[0014] In some embodiments, the positioning assembly further includes a support rod, which extends along the axial direction of the inner tube and passes through the interior of the inner tube and the balloon.

[0015] In some embodiments, the distal end of the support rod includes an outer diameter variation section, and the distal radial dimension of the outer diameter variation section is smaller than the proximal radial dimension; the distal end of the support rod is connected to the distal end of the balloon.

[0016] In some embodiments, the pushing assembly further includes an outer tube, which is sleeved on the outside of the pushing tube.

[0017] In some embodiments, the inner tube further comprises a third section connected to the proximal end of the second section, and the delivery system further comprises a handle assembly connected to the third section of the inner tube, and the handle assembly is at least partially fixed to the outer tube.

[0018] In some embodiments, the handle comprises:

[0019] a first handle fixed to the outer tube;

[0020] a second handle, located at the proximal end of the first handle, wherein a sealing tube is provided inside the second handle, and an elastic member and a push rod are provided inside the sealing tube;

[0021] In which, the interior of the sealing tube forms a cavity on the distal side of the push rod, the third section of the inner tube and the pressurizing component are respectively connected to the cavity, the push rod is configured to be able to move along the axial direction of the inner tube and protrude from the proximal end of the second handle, and the elastic member is configured to apply a pushing force toward the distal direction to the push rod.

[0022] In some embodiments, the pushing assembly further comprises a stopper, which is disposed between the inner tube and the pushing tube and is fixed relative to the inner tube, and the pushing tube comprises an inner diameter varying section;

[0023] The first handle and the outer tube are configured so that when the first handle and the outer tube move distally, they drive the push tube to move distally so that the inner diameter change section passes through the limiter; when the first handle and the outer tube move proximally, the inner diameter of the inner diameter change section is smaller than the outer diameter of the limiter, thereby limiting the push tube from moving proximally.

[0024] In some embodiments, a first indicator is provided on the outer surface of the proximal end of the push tube. When the push tube moves toward the distal end, the first indicator is exposed at the distal end of the sheath tube.

[0025] In some embodiments, a protective component is further included, which is at least partially covered on the outside of the implant to limit the radial size of the implant.

[0026] In some embodiments, the protective component includes a pressing component and a connecting tube, the connecting tube includes a first part at the distal end and a second part at the proximal end, the first part is sleeved on the outside of the implant, the second part is sleeved on the outside of the push tube, and the pressing component is sleeved on the outside of the second part.

[0027] In some embodiments, the system further comprises a sheath, and a second indicator is provided on the proximal outer surface of the first section of the inner tube. When the balloon passes through the sheath and moves distally, the second indicator is exposed at the proximal end of the sheath.

[0028] The conveying system provided by this application has the following advantages:

[0029] By adopting this application, a balloon is positioned at the distal end of the implant. Once the balloon enters the vascular puncture site, it expands and achieves positioning. This facilitates pushing the implant to the designated location via the push tube. The balloon acts as a subcutaneous pressure element, applying pressure directly near the vascular puncture site, facilitating accurate implant release without upstream clamping of the vessel, reducing patient discomfort. This system can be used not only for the delivery of vascular occlusion implants, but also for the delivery of other types of implants into the human body or animal body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0031] Figure 1 is a structural diagram of an implant delivery system according to an embodiment of the present application;

[0032] Figure 2 This is a schematic structural diagram of a handle assembly according to an embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the cooperation between the protection component and the push component in one embodiment of the present application;

[0034] Figure 4 This is a schematic diagram of the arrangement of a limiting member according to an embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of the cooperation between the support rod and the balloon according to one embodiment of the present application;

[0036] Figure 6 This is a schematic diagram of inserting a balloon into a blood vessel through a sheath according to an embodiment of the present application;

[0037] Figure 7 This is a schematic diagram of a balloon arriving at a designated position according to an embodiment of the present application;

[0038] Figure 8 Schematic diagram of the handle assembly when the balloon is fully inflated according to one embodiment of the present application;

[0039] Figure 9 This is a schematic diagram of a proximal traction delivery system after the balloon is inflated according to an embodiment of the present application;

[0040] Figure 10 This is a schematic diagram of a push-through implant according to an embodiment of the present application;

[0041] Figure 11 This is a schematic diagram of an embodiment of the present application wherein the sheath is pulled out after the implant is pushed into place;

[0042] Figure 12This is a schematic diagram of the push tube advancing toward the distal end after the implant is pushed into place according to one embodiment of the present application;

[0043] Figure 13 is a schematic diagram of implant release according to an embodiment of the present application;

[0044] Figure 14 is a schematic diagram of extracting an implant delivery system according to an embodiment of the present application;

[0045] Figure 15 Schematic diagram of vascular channel closure according to an embodiment of the present application.

[0046] Reference numerals:

[0047] 1 balloon 10 sealing ring

[0048] 101 Balloon distal welding section 11 Push rod

[0049] 2 Inner tube 110 Spring limiter

[0050] 201 Section 12 End Cap

[0051] 202 Section 2 13 Sealing Tube

[0052] 203 Section 3 14 First Handle

[0053] 3 Push tube 15 Inner ring of the first handle

[0054] 4 Outer tube 16 Second handle

[0055] 51 first limiter 17 syringe

[0056] 52 Second limiter 18 Two-way valve

[0057] 6 Pressing part 19 PU tube

[0058] 7 Connecting tube 20 Sheath tube

[0059] 701 Part 1 21 First Indicator

[0060] 702 Part 22 Second Indicator

[0061] 8 Support rod 30 Implant

[0062] 9 Springs 31 Blood Vessels DETAILED DESCRIPTION

[0063] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. "Or" and "or" in the specification may both mean "and" or "or". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein for convenience only, such as according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although "first" or "second" etc. are used in this specification to represent certain features, they are only used to represent the function and are not intended to limit the number and importance of specific features. In this application, for a component, "distal end" refers to the end away from the operator and "proximal end" refers to the end close to the operator. For example, in Figure 1 In the perspective of the balloon, the left side is the distal end and the right side is the proximal end. The "axial direction" in this application refers to the axial direction of the inner tube, for example, Figure 1 In the perspective of the present invention, the left and right directions are axial directions. The inside and outside in this application are relative to the axis of the balloon, the side close to the axis is the inside, and the side away from the axis is the outside.

[0064] The present application provides an implant delivery system, including an implant, a positioning assembly and a pushing assembly. The positioning assembly includes a balloon and an inner tube, the inner tube includes a first section and a second section, the first section is located at the distal end of the second section, the first section is connected to the balloon, and the second section is configured to carry the implant. The pushing assembly includes a pushing tube, the pushing tube is slidably mounted on the second section of the inner tube and is located at the proximal end of the implant, and the pushing tube is configured to push the implant to move in the distal direction. When in use, after the balloon enters the blood vessel puncture site, it is convenient to push the implant to the designated site through the pushing tube. The balloon acts as a subcutaneous pressure element, applying pressure directly to the vicinity of the blood vessel puncture entry site, which is beneficial to the accurate release of the implant, without the need for upstream clamping of the blood vessel, and reducing the patient's discomfort. The system is suitable for the delivery of various types of implants into the human body or animal body.

[0065] The following combination Figures 1 to 15 The structure of the implant delivery system in a specific embodiment is described below. It should be understood that the illustrations and the following description are merely illustrative and do not limit the scope of protection of this application. While the specific embodiment illustrates the delivery of a vascular occlusion implant into a blood vessel, this application is not limited thereto.

[0066] like Figures 1 to 3As shown, the present application provides an implant delivery system, including an implant, a positioning assembly, a pushing assembly and a handle assembly. The positioning assembly includes a balloon 1 and an inner tube 2. The positioning assembly also includes a charging component, which is connected to the inner tube and is configured to charge the balloon through the inner tube. The charging component includes a syringe 17, a two-way valve 18 and a PU tube 19. The two-way valve 18 is located between the syringe 17 and the PU tube 19. When the two-way valve 18 is opened, the syringe 17 and the PU tube 19 can be connected. By operating the syringe 17, the balloon 1 can be inflated or filled with liquid through the PU tube 19 and the inner tube 2 in turn to expand the balloon 1. The filling can be to inject physiological saline or contrast liquid into the balloon 1. The balloon 1 has a foldable state when it is not filled and a filled state. The diameter of the balloon 1 after filling is D. The balloon 1 has a smaller diameter when it is not filled and folded, and can pass through the sheath 20 (shown in Figure 6 ) and enter the interior of the blood vessel. The inner tube 2 includes a first section 201, a second section 202 and a third section 203 which are arranged in sequence from the distal end to the proximal end and are integrally formed. The first section 201 is connected to the balloon 1, the second section 202 is configured to carry the implant 30, and the handle assembly is connected to the third section 203 of the inner tube 2. Preferably, the third section 203 at least partially enters the interior of the handle assembly. The pushing assembly includes a pushing tube 3 and an outer tube 4, and the handle assembly is at least partially fixed to the outer tube 4. The outer tube 4 is sleeved on the outside of the pushing tube 3, and the pushing tube 3 is slidably sleeved on the second section 202 of the inner tube 2. The outer tube 4 is configured to drive the pushing tube 3 to move distally along the axial direction of the pushing tube 3. The pushing tube 3 is located at the proximal end of the implant 30, and the pushing tube 3 is configured to push the implant 30 to move distally to the position of the balloon 1. The diameter of the outer tube 4 is d, which is smaller than the sheath 20 used (shown in Figure 6 ) diameter, so that the outer tube 4 and the push tube 3 can smoothly pass through the sheath tube 20 when pushing the implant. Figure 2 As shown, the handle assembly includes a first handle 14 and a second handle 16, with the second handle 16 located proximal to the first handle 14. The first handle 14 is fixed to the outer tube 4. In some embodiments, a first handle inner ring 15 is provided within the first handle 14, which is fixed to the outer tube 4, for example, by welding or other means. Therefore, when the first handle 14 is operated to move distally, the first handle 14 can drive the push tube 3 distally via the outer tube 4, thereby pushing the implant 30.

[0067] In some embodiments, the positioning assembly further includes a support rod 8 , which extends axially along the inner tube 2 and passes through the interior of the inner tube 2 and the balloon 1 .

[0068] In some embodiments, the distal end of the support rod 8 includes an outer diameter change section (not shown in the figure), and the distal radial dimension of the outer diameter change section is smaller than the proximal radial dimension; the distal end of the support rod 8 is connected to the distal end of the balloon 1, for example, by welding to the distal tube leg of the balloon 1.

[0069] A sealing tube 13 is provided within the second handle 16, and an elastic member and a push rod 11 are provided within the sealing tube 13. A cavity is formed within the sealing tube 13 at the distal end of the push rod 11. The third section 203 of the inner tube 2 and the pressurizing component are each in communication with the cavity; preferably, the third section 203 of the inner tube 2 and the PU tube 19 are each in communication with the cavity. Therefore, when the balloon 1 needs to be pressurized, gas or liquid is injected into the cavity via the syringe 17 and the PU tube 19, and then enters the inner tube 2. A sealing ring 10 is provided between the distal end of the push rod 11 and the inner wall of the sealing tube 13 to enhance the sealing effect of the cavity. The push rod 11 is configured to move axially along the inner tube 2 and protrude beyond the proximal end of the second handle 16. The elastic member is configured to apply a distal pushing force to the push rod 11. In this embodiment, the elastic member is a spring 9, and can alternatively be a compression spring. A spring limiting portion 110 is provided at the distal end of the push rod 11 , an end cover 12 is provided at the proximal end of the second handle 16 , and both ends of the spring 9 are respectively abutted against the spring limiting portion 110 and the end cover 12 . Figure 2 In the illustrated position, the proximal end of the push rod 11 is located within the second handle 16 and does not protrude from the second handle 16. Under the pushing force of the spring 9, the push rod 11 is in a relatively stable position. During balloon 1 inflation, once the balloon 1 is fully filled, the gas within the cavity gradually increases, driving the push rod 11 toward the proximal end, overcoming the pushing force of the spring 9. The push rod 11 moves until the proximal end protrudes from the second handle 16. By observing the state of the push rod 11, the operator can determine whether the balloon 1 is fully filled.

[0070] When using this system to deliver implant 30 into a blood vessel, balloon 1 is placed at the vascular puncture site and then expanded to achieve positioning. Injector 17 then inflates balloon 1, ensuring it remains firmly in the designated position. Operators then manipulate first handle 14 to push implant 30 via outer tube 4 and push tube 3 to the location of balloon 1. Balloon 1 acts as a subcutaneous pressure element, applying pressure directly to the vicinity of the vascular puncture site, facilitating accurate release of implant 30. The system's ergonomic design significantly reduces instrument operation difficulty, shortens surgical time, and minimizes patient pain and complications.

[0071] In some embodiments, as Figure 3As shown, the system also includes a protective assembly that at least partially overlies the implant to limit its radial dimensions. The protective assembly includes a pressing component 6 and a connecting tube 7. The connecting tube 7 comprises a distal first portion 701 and a proximal second portion 702. The first portion 701 overlies the implant 30, while the second portion 702 overlies the distal end of the push tube 3. The pressing component 6 is positioned externally to the second portion 702. In this embodiment, an outer tube 4 is positioned between the first portion 701 and the implant 30, and between the second portion 702 and the push tube 3. In this embodiment, the implant 30 is a sheet-like structure, preferably made of a bioabsorbable material, such as one or more of polyethylene glycol, collagen, and chitosan. The implant 30 is rolled into a ring and then overlaid on the second section 202 of the inner tube 2. The connecting tube 7 overlies the implant 30, and the force of the pressing component 6 maintains the implant 30 in a relatively thin state, facilitating delivery of the implant 30 into the blood vessel. After the implant 30 is delivered to its proper position, the entire system is withdrawn from the blood vessel. When the forces acting on the connecting tube 7 and the pressing component 6 are removed, the implant 30 expands under its own elasticity to achieve blood vessel blocking.

[0072] like Figure 3 and Figure 4 As shown, the pushing assembly also includes a limiter, which is arranged between the inner tube 2 and the pushing tube 3 and is fixed relative to the inner tube 2. The number of limiters can be one or more. Here, two limiters are set as an example: the first limiter 51 and the second limiter 52. The setting of multiple limiters can serve as backup for each other to ensure the normal implementation of the limiter function. The pushing tube 3 includes an inner diameter changing section, and the inner diameter of the inner diameter changing section gradually increases from the distal end to the proximal end. In the initial state, the minimum inner diameter position of the inner diameter changing section is located on the distal side of the limiter. The first handle and the outer tube 4 are configured so that the first handle and the outer tube 4 move toward the distal end, driving the pushing tube 3 to move toward the distal end so that the inner diameter changing section passes through the limiter; the first handle and the outer tube 4 move toward the proximal end, and the inner diameter of the inner diameter changing section is smaller than the outer diameter size of the limiter, thereby limiting the movement of the pushing tube 3 toward the proximal direction. In one embodiment, when operating the first handle 14 and driving the push tube 3 to move in the distal direction through the outer tube 4, the inner diameter of the inner diameter change section passing through the limiter gradually increases, forming a clearance fit with the limiter. The limiter will not affect the movement of the push tube 3 in the distal direction relative to the inner tube 2, so that the inner diameter change section passes through the limiter. The limiter is used to limit the movement of the push tube 3 in the proximal direction relative to the inner tube 2. After the implant 30 is pushed into place, the outer tube 4 is withdrawn through the first handle 14. At this time, the minimum inner diameter position of the inner diameter change section of the push tube 3 is smaller than the outer diameter of the limiter, that is, the push tube 3 stops moving in the proximal direction.

[0073] like Figure 5As shown, the distal end of the balloon 1 is provided with a distal welding section 101. The proximal end of the support rod 8 extends to the interior of the second handle 16. The system also includes a sheath 20, which is used to provide a channel for the balloon 1 to enter the blood vessel 31. The support rod 8 can play a good supporting role in the entire system, allowing the balloon 1 and the inner tube 2 to pass through the sheath 20 smoothly without deformation. The distal end of the support rod 8 includes an outer diameter changing section, and the distal end size of the outer diameter changing section is smaller than the proximal end size, so that the distal tip of the support rod 8 is smaller in size and more flexible, is not easy to damage the blood vessel, and has good passing performance.

[0074] The following combination Figures 6 to 15 The process of delivering the implant 30 by the implant delivery system of this embodiment is described in detail. Figure 6 As shown, the diameter of the folded balloon 1 is smaller than the inner diameter of the delivery rod at the distal end of the sheath 20. The folded balloon 1, which is in an uninflated state, is passed through the sheath 20, allowing the balloon 1 to enter the interior of the blood vessel 31. A second indicator 22 is provided on the proximal outer surface of the first section 201 of the inner tube 2. When the balloon passes through the sheath 20 and moves distally, the second indicator 22 is exposed at the proximal end of the sheath 20, at which point the implant is considered to be in place. In some embodiments, when the balloon 1 passes through the sheath 20 and moves distally, the second indicator 22 is exposed at the proximal entrance position of the sheath 20. When the operator sees the second indicator 22 approaching the proximal entrance position of the sheath 20, they know that the balloon 1 has reached the designated position and stop pushing the balloon 1. The second indicator 22 can, for example, be a color mark, pattern mark, text mark, etc. provided on the outer surface of the inner tube 2. The second indicator 22 can accurately indicate the push position of the balloon 1.

[0075] like Figure 7 and Figure 8 As shown, after balloon 1 reaches the designated position, syringe 17 is used to inflate balloon 1, gradually filling the balloon 1. As balloon 1 is filled, the cavity within sealed tube 13 is filled with gas or liquid. After balloon 1 is fully filled, syringe 17 continues to inject gas, gradually increasing the gas within sealed tube 13 and exerting a thrust on push rod 11. When the proximal end of push rod 11 emerges from the proximal end of second handle 16, balloon 1 is fully filled. The operator stops inflating when the proximal end of push rod 11 is visible. The inflated balloon 1 can be spherical or ellipsoidal in shape.

[0076] like Figure 9 As shown, after the balloon 1 is filled, the handle assembly is pulled in the proximal direction along the sheath 20 until it cannot be pulled anymore. At this time, the balloon 1 is just on the inner wall of the blood vessel 31 at the puncture site of the blood vessel 31, and the positioning of the balloon 1 is completed and maintained in place.

[0077] like Figure 10As shown, the right hand holds the second handle 16 and keeps it stationary, while the left hand holds the first handle 14 and pushes it distally, pushing the push tube 3 distally via the outer tube 4. During the distal pushing process, the inner diameter change section of the push tube 3 passes through the stopper without being blocked by the stopper assembly. The push tube 3 pushes the implant 30 to the position of the balloon 1, ensuring that the implant 30 is accurately pushed to the puncture site of the blood vessel 31. The implant 30 is preferably made of a bioabsorbable material and can rapidly expand to seal the wound after hemostasis.

[0078] like Figure 11 As shown, the first handle 14 is held and moved proximally until it meets the second handle 16, and the sheath 20 is pulled out of the blood vessel 31. The first handle 14 drives the outer tube 4 to move proximally, and the outer tube 4 drives the push tube 3 to move proximally until the inner diameter of the inner diameter changing section of the push tube 3 forms an interference fit with the stopper at the minimum inner diameter position. Continuing to move proximally, the outer tube 4 cannot drive the push tube 3 to move proximally, and the push tube 3 remains in place.

[0079] like Figure 12 As shown, the outer surface of the proximal end of the push tube 3 is provided with a first indicator 21. The inner diameter change section is located at the position of the limiter, and when the push tube 3 is driven to move toward the distal direction, the first indicator 21 is exposed at the distal end of the sheath tube 20. Specifically, Figure 11 In this state, the push tube 3 is held and pressed to move it a short distance distally. The push tube 3 is stopped until the first indicator 21 emerges from the sheath 20. The push tube 3 is maintained in this position for 60 to 120 seconds, compressing the implant 30 to a certain degree, which can more quickly achieve vascular occlusion. For example, the implant 30 can be compressed by 1 / 5 to 1 / 3. The provision of the first indicator 21 prevents the operator from over-compressing the implant 30 when pressing the push tube 3. The first indicator 21 can, for example, be a color mark, pattern mark, or text mark provided on the outer surface of the push tube 3. The first indicator 21 accurately indicates the safe compression distance of the implant 30 by the push tube 3, preventing damage to the implant 30 caused by excessive compression. By providing the first indicator 21 and the second indicator 22, the system provides the operator with accurate and timely prompts. The operator no longer needs to rely on experience to determine the push position of the balloon 1 and the degree of compression of the implant 30. This system is simple and easy to operate, reduces surgical time, and significantly reduces bed rest and discomfort for the patient.

[0080] like Figure 13 As shown, the syringe 17 draws negative pressure, causing the balloon 1 to release pressure. After the pressure is released, the pressure applied to the push rod 11 by the cavity of the sealing tube 13 disappears, and the push rod 11 returns to its original position under the pushing force of the spring 9. Keep pressing the push tube 3 and pull out the balloon 1, inner tube 2, push tube 3 and sheath tube 20. Figure 14As shown, continued pressure is applied to the vessel 31 for 60 to 120 seconds. The implant 30 expands, closing the tiny passageway through which the balloon 1 was withdrawn. After wound healing, this allows re-entry into the vessel 31, accommodating multiple punctures at the same site. Furthermore, regardless of the thickness of the tissue between the skin and the puncture site, the punctured blood flow path is naturally closed, reducing the likelihood of false aneurysm formation. The implant 30 is preferably made of a bioresorbable material, eliminating the need for subsequent removal.

[0081] The above content is a further detailed description of the present application in conjunction with specific preferred embodiments, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered to fall within the scope of protection of the present application.

Claims

1. An implant delivery system, characterized in that: include: implants; a positioning assembly comprising a balloon and an inner tube, the inner tube comprising a first section and a second section, the first section being located at a distal end of the second section, the first section being connected to the balloon, and the second section being configured to carry the implant; The pushing assembly includes a pushing tube, which is slidably sleeved on the second section of the inner tube and located at the proximal end of the implant. The pushing tube is configured to push the implant toward the distal end.

2. The implant delivery system according to claim 1, wherein: The positioning assembly further includes an inflation component connected to the inner tube and configured to inflate the balloon through the inner tube.

3. The implant delivery system according to claim 1, wherein: The positioning assembly further includes a support rod, which extends along the axial direction of the inner tube and penetrates the interior of the inner tube and the balloon.

4. The implant delivery system according to claim 3, wherein: The distal end of the support rod includes an outer diameter changing section, and the distal radial dimension of the outer diameter changing section is smaller than the proximal radial dimension; the distal end of the support rod is connected to the distal end of the balloon.

5. The implant delivery system according to claim 2, wherein: The pushing assembly further includes an outer tube, which is sleeved on the outside of the pushing tube.

6. The implant delivery system according to claim 5, wherein: The inner tube further includes a third section connected to the proximal end of the second section. The delivery system further includes a handle assembly connected to the third section of the inner tube, and the handle assembly is at least partially fixed to the outer tube.

7. The implant delivery system according to claim 6, wherein: The handle comprises: a first handle fixed to the outer tube; a second handle, located at the proximal end of the first handle, wherein a sealing tube is provided inside the second handle, and an elastic member and a push rod are provided inside the sealing tube; In which, the interior of the sealing tube forms a cavity on the distal side of the push rod, the third section of the inner tube and the pressurizing component are respectively connected to the cavity, the push rod is configured to be able to move along the axial direction of the inner tube and protrude from the proximal end of the second handle, and the elastic member is configured to apply a pushing force toward the distal direction to the push rod.

8. The implant delivery system according to claim 7, wherein: The pushing assembly further includes a limiting member, which is disposed between the inner tube and the pushing tube and is fixed relative to the inner tube, and the pushing tube includes an inner diameter changing section; The first handle and the outer tube are configured so that when the first handle and the outer tube move distally, they drive the push tube to move distally so that the inner diameter change section passes through the limiter; when the first handle and the outer tube move proximally, the inner diameter of the inner diameter change section is smaller than the outer diameter of the limiter, thereby limiting the push tube from moving proximally.

9. The implant delivery system according to claim 1, wherein: A first indicator is provided on the outer surface of the proximal end of the pushing tube. When the pushing tube moves toward the distal end, the first indicator is exposed at the distal end of the sheath tube.

10. The implant delivery system according to claim 1, wherein: The invention also comprises a protection component which is at least partially sleeved on the outside of the implant to limit the radial size of the implant.

11. The implant delivery system according to claim 10, wherein: The protection component includes a pressing component and a connecting tube, the connecting tube includes a first part at the distal end and a second part at the proximal end, the first part is sleeved on the outside of the implant, the second part is sleeved on the outside of the push tube, and the pressing component is sleeved on the outside of the second part.

12. The implant delivery system according to claim 1, wherein: It also includes a sheath tube, and the proximal outer surface of the first section of the inner tube is provided with a second indicator. When the balloon passes through the sheath tube and moves toward the distal end, the second indicator is exposed at the proximal end of the sheath tube.

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