Implant delivery system

Abstract

The invention 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 technical field of medical devices, in particular to an implant delivery system. BACKGROUND

[0002] Transfemoral / radial artery puncture is a commonly used method for establishing vascular access in interventional procedures, usually by inserting a hollow needle through the patient's skin and muscle tissue into the vascular system to perform an interventional procedure. During the entire procedure, the vascular puncture creates a wound, and once the interventional procedure is completed, the vascular access needs to be closed or sealed in an appropriate manner. Puncture site complications during the procedure are always a problem that every interventional physician has to face. Current methods for stopping bleeding at the puncture site after femoral artery intervention include manual compression, mechanical compression, and vascular closure. The traditional manual compression method has been clinically applied for a long time. A physician or nurse applies pressure to the wound until the blood clots and the tissue repairs sufficiently to seal the puncture site. The external pressure is maintained for more than an hour, and long-term compression and bed rest not only increase the workload and work efficiency of medical staff, but also increase the pain of patients. In addition, there is a risk of hematoma from the blood flowing out of the blood vessel, which continues until enough clotting occurs at the wound site. Furthermore, the external pressure device of the arterial compression device is usually not suitable for certain patients, such as those with a large amount of subcutaneous fat tissue, because the skin surface will be significantly away from the puncture site of the vascular system. As a result, there will be inaccurate skin compression and less effective wound healing. Since the mid-1990s, with the widespread use of vascular closure devices and various mechanical compression devices, the patient's postoperative bed rest time has been shortened to some extent, and the patient's comfort has been improved, but some complications have also inevitably occurred.

[0003] The existing vascular closure hemostasis method still has the following defects:

[0004] 1. By injecting a foreign pharmacological material into the blood vessel to induce hemostasis. Once this method is used, the material cannot be removed without surgical intervention; if the material is not correctly placed into the blood vessel lumen, it can cause complications such as vascular occlusion. The patient needs to be re-punctured at this site for various reasons, and this site cannot provide the ability for interventional instruments to re-enter the blood vessel lumen.

[0005] 2. Many existing technologies only rely on tactile sensation to indicate to the physician the correct placement of the puncture closure device, which is difficult to operate and can require upstream clamping of the blood vessel to reduce the pressure inside the lumen of the puncture site to atmospheric pressure, which can damage the blood vessel and cause discomfort to the patient.

[0006] 3. The existing technology also requires medical staff to continuously monitor the tedious process.

[0007] 4. Due to the thickness of the tissue between the skin and the puncture site, existing vascular occlusion devices can diffuse the applied pressure as the distance increases, and cause the release position of the vascular occlusion component to shift. Summary of the Invention

[0008] To address the problems in the prior art, the purpose of this application is to provide an implant delivery system that uses a balloon to ensure the implant is accurately delivered to a designated location and to achieve accurate implant release.

[0009] This application provides an implant delivery system, including:

[0010] Implant;

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

[0012] A pushing component includes a pushing tube slidably fitted onto the second segment of the inner tube and located at the proximal end of the implant, the pushing tube being configured to push the implant toward the distal end.

[0013] In some embodiments, the positioning assembly further includes a pressurization component connected to the inner tube and configured to pressurize the balloon through the inner tube.

[0014] In some embodiments, the positioning assembly further includes a support rod that extends axially along 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 segment, the distal radial dimension of which 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 component further includes an outer tube, which is sleeved on the outside of the pushing tube.

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

[0018] In some embodiments, the handle includes:

[0019] The first handle is fixed to the outer tube;

[0020] The second handle is located near the first handle. The second handle has a sealing tube inside, and the sealing tube has an elastic element and a push rod inside.

[0021] The sealing tube forms a cavity at the distal end 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 move axially along the inner tube and protrude from the proximal end of the second handle. The elastic element is configured to apply a pushing force toward the distal end to the push rod.

[0022] In some embodiments, the pushing component further includes a limiting member disposed between the inner tube and the pushing tube and fixed relative to the inner tube, wherein the pushing tube includes an inner diameter variation segment;

[0023] The first handle and the outer tube are configured such that when the first handle and the outer tube move distally, they drive the push tube distally so that the inner diameter changing section passes through the limiting member; Alternatively, when the first handle and the outer tube move proximally, the inner diameter of the inner diameter changing section is smaller than the outer diameter of the limiting member, thus restricting the push tube from moving proximally.

[0024] In some embodiments, the device further includes a sheath, wherein a first indicator is provided on the proximal outer surface of the push tube, and the first indicator is exposed at the distal end of the sheath when the push tube moves to the distal end.

[0025] In some embodiments, a protective component is also included, at least partially fitted over the outside of the implant, to limit the radial dimension of the implant.

[0026] In some embodiments, the protective component includes a pressing member and a connecting tube, the connecting tube including a distal first portion and a proximal second portion, the first portion being sleeved outside the implant, the second portion being sleeved outside the push tube, and the pressing member being sleeved outside the second portion.

[0027] In some embodiments, the system further includes a sheath, the outer surface of the proximal end of a first segment of the inner tube having a second indicator that protrudes from the proximal end of the sheath as the balloon moves distally through the sheath.

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

[0029] By employing this application, a balloon is placed at the distal end of the implant. After the balloon enters the vascular puncture site, it expands to achieve positioning, facilitating the delivery of the implant to the designated location via a push tube. The balloon, acting as a subcutaneous pressure element, applies pressure directly to the vicinity of the vascular puncture site, promoting accurate implant release without the need for upstream vessel clamping, thus 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 humans or animals. Attached Figure Description

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

[0031] Figure 1 This is a schematic diagram of the structure of an implant delivery system according to an embodiment of this application;

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

[0033] Figure 3 This is a schematic diagram of the cooperation between the protection component and the push component according to an embodiment of this application;

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

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

[0036] Figure 6 This is a schematic diagram of an embodiment of the present application, showing the insertion of a balloon through a sheath into a blood vessel;

[0037] Figure 7 This is a schematic diagram of a balloon reaching a designated position according to an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the state of the handle assembly when the balloon is fully inflated according to an embodiment of this application;

[0039] Figure 9 This is a schematic diagram of a balloon inflating and traction delivery system according to an embodiment of this application;

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

[0041] Figure 11 This is a schematic diagram of the sheath being pulled out after the implant has been pushed into place according to an embodiment of this application;

[0042] Figure 12This is a schematic diagram showing the pushing tube advancing towards the distal end after the implant has been pushed into place according to an embodiment of this application;

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

[0044] Figure 14 This is a schematic diagram of the implant delivery system being pulled out according to an embodiment of this application;

[0045] Figure 15 This is a schematic diagram of vascular channel closure according to an embodiment of this application.

[0046] Figure label:

[0047] 1 balloon, 10 sealing rings

[0048] 101 Distal section of balloon welding 11 Push rod

[0049] 2 Inner tube 110 Spring limiting part

[0050] 201 First section 12 End cap

[0051] 202 Second Section 13 Sealing Tube

[0052] 203 Third Segment 14 First Handle

[0053] 3 Push tube 15 First handle inner ring

[0054] 4. Outer tube 16. Second handle.

[0055] 51 First limiting component 17 Syringe

[0056] 52 Second limiting element 18 Two-way valve

[0057] 6 Pressing components 19 PU tubes

[0058] 7 Connecting tube 20 Sheath tube

[0059] 701 Part 1 21 First Instruction

[0060] 702 Part 22 Second Instruction

[0061] 8 support rods 30 implants

[0062] 9 springs 31 blood vessels Detailed Implementation

[0063] Example embodiments will now be described more fully with reference to the accompanying drawings. However, 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 concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may 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 this application, these terms are used herein only for convenience, such as the orientation 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 denote certain features, they are only for indication of function and not as a limitation on the number or importance of specific features. In this application, for a component, “far end” refers to the end furthest from the operator, and “proximal end” refers to the end closest to the operator. For example, in Figure 1 From this perspective, the left side of the balloon is the distal end, and the right side is the proximal end. In this application, "axial" refers to the axial direction of the inner tube, for example, in... Figure 1 From this perspective, the left and right directions are the axial direction. In this application, the inner and outer sides are relative to the axis of the balloon; the side closer to the axis is the inner side, and the side farther from the axis is the outer side.

[0064] This application provides an implant delivery system, including an implant, a positioning component, and a delivery component. The positioning component includes a balloon and an inner tube. The inner tube includes a first segment and a second segment. The first segment is located distal to the second segment and is connected to the balloon. The second segment is configured to carry the implant. The delivery component includes a delivery tube, which is slidably fitted onto the second segment of the inner tube and located proximal to the implant. The delivery tube is configured to push the implant distally. In use, after the balloon is inserted into the vascular puncture site, it facilitates the delivery of the implant to the designated site via the delivery tube. The balloon, acting as a subcutaneous pressure element, applies pressure directly to the vicinity of the vascular puncture site, facilitating accurate implant release without the need for upstream clamping of the blood vessel, thus reducing patient discomfort. This system is suitable for the delivery of various types of implants into humans or animals.

[0065] The following is combined with Figures 1 to 15 The structure of the implant delivery system in a specific embodiment is described. It is understood that the illustrations and the following description are merely examples and are not intended to limit the scope of this application. In this specific embodiment, the delivery of a vascular occlusion implant into a blood vessel is used as an example for illustration, but this application is not limited thereto.

[0066] like Figures 1 to 3As shown, this application provides an implant delivery system, including an implant, a positioning component, a pushing component, and a handle assembly. The positioning component includes a balloon 1 and an inner tube 2. The positioning component also includes an inflation component, which is connected to the inner tube and configured to inflate the balloon through the inner tube. The inflation 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, and opening the two-way valve 18 connects the syringe 17 and the PU tube 19. By operating the syringe 17, the balloon 1 can be inflated by sequentially inflating or filling with fluid through the PU tube 19 and the inner tube 2. The fluid filling can be the injection of physiological saline or contrast fluid into the balloon 1. The balloon 1 has a foldable state when uninflated and a fully inflated state. The diameter of the balloon 1 when inflated is D, and the balloon 1 when uninflated and folded has a smaller diameter that can pass through the sheath 20 (shown in...). Figure 6 The inner tube 2 includes a first segment 201, a second segment 202, and a third segment 203, sequentially arranged from distal to proximal and integrally formed. The first segment 201 is connected to the balloon 1, the second segment 202 is configured to carry the implant 30, and the handle assembly is connected to the third segment 203 of the inner tube 2. Preferably, the third segment 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 outside the pushing tube 3, and the pushing tube 3 is slidably sleeved on the second segment 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 is configured to push the implant 30 distally to the position of the balloon 1. The diameter d of the outer tube 4 is smaller than that of the sheath 20 used (shown in Figure 1). Figure 6 The diameter of the outer tube 4 and the push tube 3 allows the implant to pass smoothly through the sheath 20 when it is pushed. 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, the first handle 14 has an inner ring 15, 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 through the outer tube 4, thereby pushing the implant 30.

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

[0068] In some embodiments, the distal end of the support rod 8 includes an outer diameter variation section (not shown in the figure), the radial dimension of the distal end of the outer diameter variation section being smaller than the radial dimension of the proximal end; 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 leg of the balloon 1.

[0069] The second handle 16 has a sealing tube 13 inside, and the sealing tube 13 has an elastic element and a push rod 11 inside. A cavity is formed inside the sealing tube 13 at the distal end of the push rod 11, and the third section 203 of the inner tube 2 and the inflation component are respectively connected to the cavity; preferably, the third section 203 of the inner tube 2 and the PU tube 19 are respectively connected to the cavity. Therefore, when the balloon 1 needs to be inflated, gas or liquid is injected into the cavity through 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 improve the sealing effect of the cavity. The push rod 11 is configured to be axially movable along the inner tube 2 and protrude from the proximal end of the second handle 16, and the elastic element is configured to apply a pushing force toward the distal end of the push rod 11. In this embodiment, the elastic element is a spring 9, and can optionally be a compression spring. The far end of the push rod 11 is provided with a spring limiting part 110, and the near end of the second handle 16 is provided with an end cap 12. The two ends of the spring 9 abut against the spring limiting part 110 and the end cap 12 respectively. Figure 2 In the shown state, the proximal end of the push rod 11 is located inside the second handle 16 and does not protrude from it. Under the pushing force of the spring 9, the push rod 11 is in a relatively stable state. When the balloon 1 is inflated, after the balloon 1 is fully inflated, the gas in the cavity gradually increases, driving the push rod 11 to move towards the proximal end against the pushing force of the spring 9. The push rod 11 moves to the proximal end protruding from the second handle 16, and the operator can determine whether the balloon 1 is fully inflated by observing the state of the push rod 11.

[0070] When using this system to deliver the implant 30 into the blood vessel, the balloon 1 is inserted into the puncture site and inflated to achieve positioning. The balloon 1 is then inflated using the syringe 17, ensuring it remains well-held at the designated location. At this point, operating the first handle 14 allows the implant 30 to be pushed to the balloon 1's position via the outer tube 4 and the push tube 3. The balloon 1, acting as a subcutaneous pressure element, directly applies pressure near the puncture site, facilitating accurate release of the implant 30. The system's ergonomic design significantly reduces the difficulty of instrument operation, shortens surgical time, and minimizes patient discomfort and complications.

[0071] In some implementations, such as Figure 3As shown, the system also includes a protective component, which is at least partially fitted over the implant to limit the radial dimensions of the implant. The protective component includes a pressing member 6 and a connecting tube 7. The connecting tube 7 includes a distal first portion 701 and a proximal second portion 702. The first portion 701 is fitted over the implant 30, and the second portion 702 is fitted over the distal end of the push tube 3. The pressing member 6 is located outside the second portion 702. An outer tube 4 is also provided 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 polyethylene glycol, collagen, or chitosan. The implant 30 is rolled into a ring and fitted over the second segment 202 of the inner tube 2, so that the connecting tube 7 is fitted over the outside of the implant 30. The pressing member 6 keeps 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 the correct position, the entire system is removed from the blood vessel. Once the force from the connecting tube 7 and the pressing component 6 is lost, the implant 30 expands under its own elasticity, thus achieving the effect of vascular occlusion.

[0072] like Figure 3 and Figure 4 As shown, the pushing component also includes a limiting member, located between the inner tube 2 and the pushing tube 3, and fixed relative to the inner tube 2. The number of limiting members can be one or more. Here, two limiting members are used as an example: the first limiting member 51 and the second limiting member 52. Multiple limiting members can serve as backups for each other, ensuring the normal operation of the limiting function. The pushing tube 3 includes an inner diameter changing section, the inner diameter of which gradually increases from the distal end to the proximal end. Initially, the minimum inner diameter of the inner diameter changing section is located at the distal end of the limiting member. The first handle and the outer tube 4 are configured such that when the first handle and the outer tube 4 move towards the distal end, they drive the pushing tube 3 towards the distal end, causing the inner diameter changing section to pass through the limiting member; when the first handle and the outer tube 4 move towards the proximal end, the inner diameter of the inner diameter changing section is smaller than the outer diameter of the limiting member, restricting the movement of the pushing tube 3 towards the proximal end. In one embodiment, when the first handle 14 is operated to drive the push tube 3 to move in the distal direction via the outer tube 4, the inner diameter of the inner diameter changing section after passing the limiting member gradually increases, forming a clearance fit with the limiting member. The limiting member will not affect the movement of the push tube 3 in the distal direction relative to the inner tube 2, allowing the inner diameter changing section to pass through the limiting member. The limiting member is used to restrict 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 retracted via the first handle 14. At this time, the minimum position of the inner diameter of the inner diameter changing section of the push tube 3 is smaller than the outer diameter of the limiting member, thus stopping the push tube 3 from moving in the proximal direction.

[0073] like Figure 5As shown, the distal end of balloon 1 is provided with a distal balloon welding section 101. The proximal end of the support rod 8 extends into the interior of the second handle 16. The system also includes a sheath 20, which provides a passage for balloon 1 to enter blood vessel 31. The support rod 8 provides good support for the entire system, allowing balloon 1 and inner tube 2 to pass smoothly through the sheath 20 without deformation. The distal end of the support rod 8 includes an outer diameter variation section, the distal dimension of which is smaller than the proximal dimension, resulting in a smaller distal tip size and better flexibility of the support rod 8, reducing the risk of damaging blood vessels and providing good passage performance.

[0074] The following is combined with Figures 6 to 15 This embodiment describes in detail the process of the implant delivery system delivering the implant 30. For example... Figure 6 As shown, the diameter of the folded balloon 1 is smaller than the inner diameter of the distal delivery rod of the sheath 20. The folded balloon 1, in its uninflated state, is passed through the sheath 20, allowing it to enter the blood vessel 31. A second indicator 22 is provided on the proximal outer surface of the first segment 201 of the inner tube 2. When the balloon moves distally through the sheath 20, the second indicator 22 protrudes from the proximal end of the sheath 20, indicating that the implant is in place. In some embodiments, when the balloon 1 moves distally through the sheath 20, the second indicator 22 protrudes from the proximal inlet of the sheath 20. When the operator sees the second indicator 22 approaching the proximal inlet of the sheath 20, they know that the balloon 1 has reached the designated position and can stop pushing the balloon 1. The second indicator 22 can be, for example, a color mark, pattern mark, or text mark provided on the outer surface of the inner tube 2. The second indicator 22 can accurately indicate the pushing position of the balloon 1.

[0075] like Figure 7 and Figure 8 As shown, after balloon 1 reaches the designated position, it is inflated using syringe 17. Balloon 1 gradually inflates, and during this process, the cavity inside the sealing tube 13 is filled with gas or liquid. After balloon 1 is fully inflated, gas is continuously injected through syringe 17, gradually increasing the gas volume inside the cavity of the sealing tube 13 and applying a pushing force to the push rod 11. When the proximal end of the push rod 11 protrudes from the proximal end of the second handle 16, it indicates that balloon 1 has been fully inflated. The operator stops inflating when the proximal end of the 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 inflated, the handle assembly is pulled proximally along the sheath 20 until it cannot be pulled any further. At this point, the balloon 1 is exactly on the inner wall of the blood vessel 31 at the puncture site of the blood vessel 31, thus completing the positioning of the balloon 1 and keeping it in place.

[0077] like Figure 10As shown, the right hand holds the second handle 16 stationary, while the left hand holds the first handle 14 and pushes it distally. The outer tube 4 pushes the push tube 3 distally. During this distal push, the inner diameter change section of the push tube 3 passes the limiting member without being blocked. The push tube 3 pushes the implant 30 to the location of the balloon 1, ensuring the implant 30 is accurately positioned at the puncture site of the blood vessel 31. The implant 30 is preferably made of bioabsorbable material, which 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 push tube 3 reaches the minimum position of the inner diameter change section and forms an interference fit with the limiting member. After the outer tube 4 continues to move proximally, it can no longer drive the push tube 3 to move proximally, and the push tube 3 remains in place.

[0079] like Figure 12 As shown, a first indicator 21 is provided on the proximal outer surface of the push tube 3. When the inner diameter changing section is located at the position of the limiting member, and the push tube 3 is driven to move towards the distal end, the first indicator 21 is exposed at the distal end of the sheath 20. Specifically, in Figure 11 In the controlled state, hold the push tube 3 and press it to move it a short distance distally until the first indicator 21 protrudes beyond the sheath 20. Stop moving the push tube 3 and maintain its position for 60-120 seconds to compress the implant 30 to achieve faster vascular occlusion; for example, the implant can be compressed by 1 / 5 to 1 / 3. The first indicator 21 prevents excessive compression of the implant 30 by the operator when pressing the push tube 3. The first indicator 21 can be, for example, a color mark, pattern mark, or text mark on the outer surface of the push tube 3. The first indicator 21 accurately indicates the safe compression distance of the push tube 3 against the implant 30, preventing damage to the implant 30 due to excessive compression. By providing the first indicator 21 and the second indicator 22, the system provides accurate and timely prompts to the operator. The operator does not need to rely on experience to judge the position of the balloon 1 and the degree of compression of the implant 30, making it simple and easy to operate, reducing surgical time, and significantly reducing the patient's bed rest time and discomfort.

[0080] like Figure 13 As shown, syringe 17 draws in negative pressure, causing balloon 1 to depressurize. After depressurization, the pressure exerted on push rod 11 by the cavity of sealing tube 13 disappears, and push rod 11 returns to its original position under the pushing force of spring 9. While maintaining the pressed state of push tube 3, pull out balloon 1, inner tube 2, push tube 3, and sheath 20. Figure 14As shown, continue pressing on the blood vessel 31 for 60-120 seconds. The expansion of the implant 30 itself closes the microchannel of the withdrawal balloon 1. After wound healing, this allows for re-entry into the lumen of blood vessel 31, meeting the need for multiple punctures at the same site. Furthermore, it is unaffected by the thickness of the tissue between the skin and the puncture site, naturally closing the blood flow channel and reducing the possibility of pseudoaneurysm formation. The implant 30 is preferably made of a bioabsorbable material, eliminating the need for subsequent removal.

[0081] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. An implant delivery system, comprising: The application relates to a delivery system for an implant, comprising: an implant; a positioning assembly, comprising a balloon and an inner tube, the inner tube comprising a first segment and a second segment, the first segment being located at a distal end of the second segment, the first segment being connected to the balloon, the second segment being configured to carry the implant; a pushing assembly, comprising a pushing tube, the pushing tube being slidably sleeved on the second segment of the inner tube and located at a proximal end of the implant, the pushing tube being configured to push the implant to move in a distal direction.

2. The implant delivery system of claim 1, wherein, The positioning assembly further comprises a pressurizing component, the pressurizing component being connected to the inner tube and being configured to pressurize the balloon through the inner tube.

3. The implant delivery system of claim 1, wherein, The positioning assembly further comprises a support rod, the support rod extending along an axial direction of the inner tube and being arranged inside the inner tube and the balloon.

4. The implant delivery system of claim 3, wherein, A distal end of the support rod comprises a variable-diameter segment, a distal end of the variable-diameter segment having a smaller radial dimension than a proximal end of the variable-diameter segment; the distal end of the support rod is connected to a distal end of the balloon.

5. The implant delivery system of claim 2, wherein, The pushing assembly further comprises an outer tube, the outer tube being sleeved on an outer portion of the pushing tube.

6. The implant delivery system of claim 5, wherein, The inner tube further comprises a third segment, the third segment being connected to a proximal end of the second segment, the delivery system further comprising a handle assembly, the handle assembly being connected to the third segment of the inner tube, and the handle assembly being at least partially fixed to the outer tube.

7. The implant delivery system of claim 6, wherein the implant delivery system further comprises a second sheath. The handle comprises: a first handle, the first handle being fixed to the outer tube; a second handle, the second handle being located at a proximal end of the first handle, an inner portion of the second handle being provided with a sealing tube, an inner portion of the sealing tube being provided with an elastic member and a pushing rod; wherein an inner portion of the sealing tube forms a cavity on a distal end side of the pushing rod, the third segment of the inner tube and the pressurizing component being respectively connected to the cavity, the pushing rod being configured to move in an axial direction of the inner tube and protrude from a proximal end of the second handle, the elastic member being configured to apply a pushing force to the pushing rod in a distal direction.

8. The implant delivery system of claim 7, wherein, The pushing assembly further comprises a limiting member, the limiting member being arranged between the inner tube and the pushing tube and being fixed relative to the inner tube, the pushing tube comprising a variable-inner-diameter segment; the first handle and the outer tube being configured to move in a distal direction, thereby driving the pushing tube to move in a distal direction and enabling the variable-inner-diameter segment to pass through the limiting member; the first handle and the outer tube being configured to move in a proximal direction, thereby enabling the inner diameter of the variable-inner-diameter segment to be smaller than an outer diameter of the limiting member and limiting the pushing tube from moving in a proximal direction.

9. The implant delivery system of claim 1, wherein, The delivery system further comprises a sheath tube, a first indicating member being arranged on an outer surface of a proximal end of the pushing tube, the first indicating member being exposed from a distal end of the sheath tube when the pushing tube moves in a distal direction.

10. The implant delivery system of claim 1, wherein, The delivery system further comprises a protection assembly, the protection assembly being at least partially sleeved on an outer portion of the implant to limit a radial dimension of the implant.

11. The implant delivery system of claim 10, wherein the implant delivery system further comprises a second sheath. The protection assembly comprises a pressing component and a connecting tube, the connecting tube comprising a first portion at a distal end and a second portion at a proximal end, the first portion being sleeved on an outer portion of the implant, the second portion being sleeved on an outer portion of the pushing tube, and the pressing component being sleeved on an outer portion of the second portion.

12. The implant delivery system of claim 1, wherein, The delivery system further comprises a sheath tube, a second indicating member being arranged on an outer surface of a proximal end of the first segment of the inner tube, the second indicating member being exposed from a proximal end of the sheath tube when the balloon moves in a distal direction through the sheath tube.

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