Conveying device and system

Abstract

The invention relates to a conveying device and system.The conveying device comprises a storage pipe, an outer pipe and a handle which are fixedly connected in sequence, an inner sliding rod is arranged in the outer pipe, and one end of the inner sliding rod penetrates out of the handle to be connected with a handle; a small release ball is arranged at the end, away from the outer pipe, of the storage pipe, and a support push block is arranged in the storage pipe and fixedly connected with the inner sliding rod. A locking assembly used for locking or releasing the small release ball is arranged on one side of the inner sliding rod. The handle, the inner sliding rod and the small release ball are each internally provided with a guide wire penetrating hole used for allowing a guide wire to pass through. According to the technical scheme, on one hand, the length of the locking line is greatly reduced, on the other hand, the locking line does not need to be pulled out during unlocking, unlocking can be achieved by pushing the handle to move the internal sliding rod to slide, the unlocking action is simplified, and the operation time of a doctor is shortened.

Description

Technical Field

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

[0002] According to the "Obesity Diagnosis and Treatment Guidelines (2024 Edition)", the overweight and obesity rates of residents aged 18 and above are 34.3% and 16.4% respectively. The 2019 Global Burden of Disease Study shows that the proportion of deaths caused by overweight and obesity in all-cause deaths increased from 2.8% in 1990 to 7.2% in 2019; the proportion of deaths related to chronic non-communicable diseases increased from 3.9% in 1990 to 8.0% in 2019. It can be seen that obesity has become a public problem that threatens human health.

[0003] In recent years, new weight loss technologies have gradually emerged. Duodenal jejunal cannula has become a hot topic of research at home and abroad due to its less trauma and better weight loss effect. However, existing designs mostly use a wire that runs through the entire delivery device for fixation. Since the locking wire is particularly long, it takes a long time to extract the locking wire.

[0004] In view of this, a conveying device that can shorten the operation time is particularly necessary. Summary of the invention

[0005] The purpose of the present application is to provide a delivery device and system, which can shorten the operation time of releasing the coated stent.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a conveying device, comprising a storage tube, an outer tube and a handle which are fixedly connected in sequence, wherein an inner slide bar is arranged inside the outer tube, and one end of the inner slide bar passes through the handle and is connected to a handle;

[0007] A release ball is arranged at one end of the storage tube away from the outer tube, a support push block is arranged inside the storage tube, and the support push block is fixedly connected to the internal slide rod;

[0008] A locking assembly for locking or releasing the release ball is provided on one side of the inner slide bar, the locking assembly comprising a locking wire, a fixed shaft fixed relatively to the outer tube, and a rotating hook capable of rotating about the fixed shaft, one end of the locking wire is fixedly connected to the release ball, and the other end is provided with a coil sleeved on the rotating hook, a boss portion is provided on one side of the rotating hook close to the inner slide bar, and an unlocking boss is provided on the inner slide bar, which can push the boss to make the rotating hook rotate around the fixed shaft, thereby disengaging the locking wire from the rotating hook;

[0009] The handle, the internal slide rod and the release ball are all provided with guide wire holes for the guide wire to pass through.

[0010] In an optional embodiment, a connecting cap is further provided between the outer tube and the receiving tube, and one end of the connecting cap is fixedly connected to the outer tube, and the other end of the connecting cap is fixedly connected to the receiving tube.

[0011] In an optional embodiment, the rotating hook is arranged in the connecting cap, and the fixing shaft is arranged on the inner wall of the connecting cap.

[0012] In an optional embodiment, the rotating hook includes a hook-shaped end capable of hooking the coil and a rotating end for setting a fixed axis, the boss portion is arranged between the hook-shaped end and the rotating end, and a locking groove capable of accommodating the unlocking boss is arranged between the boss portion and the rotating end.

[0013] In an optional embodiment, a pressing member is further provided between the rotating hook and the inner wall of the connecting cap for pressing the rotating hook toward the bending direction of the hook-shaped end.

[0014] In an optional embodiment, an unlocking boss limit block is further included, and the unlocking boss limit block is located on a side of the unlocking boss away from the boss portion.

[0015] In an optional embodiment, the hook-shaped end includes a first arcuate surface and a second arcuate surface capable of abutting against the coil, the first arcuate surface and the second arcuate surface are tangent to each other and have opposite bending directions;

[0016] Preferably, the curvature of the first curved surface and the second curved surface is (5-7)Π / 15.

[0017] In an optional embodiment, the guide wire perforations are coaxially arranged with the receiving tube and the outer tube.

[0018] In an optional embodiment, a coated stent is further provided on the stent pushing block, and the coated stent is connected to the release ball via a soluble inner core.

[0019] In a second aspect, the present invention provides a delivery system, comprising a gastroscope, a guidewire and a delivery device as described in any one of the aforementioned embodiments, wherein the gastroscope is used to pass the guidewire through the guidewire perforation and place the guidewire to a specified position, and after the gastroscope is withdrawn, the guidewire cooperates with the guidewire perforation of the delivery device for releasing the ball and guides the movement of the delivery device.

[0020] Through the above technical solution of the present application, when the delivery device is in a locked state, the wire loop on the locking line is sleeved on the rotating hook. When the internal sliding rod is pushed, the boss drives the rotating hook to rotate, and the wire loop on the locking line is detached from the rotating hook to achieve product unlocking. Since the locking line of the present application is changed from a reciprocating type to a detachable type, on the one hand, the length of the locking line is greatly reduced, and on the other hand, the locking line does not need to be pulled out when unlocking. Unlocking can be achieved by pushing the handle to slide the internal sliding rod, which simplifies the unlocking action and helps to reduce the doctor's operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Conveying device Figure 1 A schematic diagram of the structure of a conveying device provided in this application;

[0023] Figure 2 A cross-sectional view of a locked state of a delivery device provided in the present application;

[0024] Figure 3 for Figure 2 A magnified view of part I;

[0025] Figure 4 A cross-sectional view of a delivery device in an unlocked state provided by the present application;

[0026] Figure 5 for Figure 4 A magnified view of Part II;

[0027] Figure 6 It is a schematic diagram of the structure of the rotating hook;

[0028] Figure 7 It is a schematic diagram of the structure of the unlocking boss.

[0029] Icons: 10-release ball; 20-storage tube; 30-locking line; 40-connecting cap; 50-outer tube; 60-handle; 70-handle; 80-bracket push block; 90-internal sliding rod; 901-unlocking boss; 902-unlocking boss limit block; 100-pressing piece; 110-rotating hook; 1101-hook end; 1102-boss; 1103-locking groove; 1104-first arc surface; 1105-second arc surface. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] There are some problems with known conveying devices, such as:

[0034] First: In the existing delivery system, the stent graft is folded and placed in a cylindrical storage tube. The front end of the membrane tube of the stent graft is connected to the spherical release ball, and the release ball is placed in the opening at the front end of the storage tube. The release ball is fixed to the end of the storage tube by a locking structure (locking line), so that the stent graft is always stacked in the storage tube before release. When releasing, it is necessary to pull out the locking line to unlock the locked state, and then the stent graft can be released. Because the locking line is particularly long, it takes a long time to operate when extracting the locking line.

[0035] Second, due to the limitation of the structural design of the delivery system, the cavity through which the locking wire passes is relatively small, and the locking wire is usually relatively thin and particularly long, which may cause difficulty in extracting the locking wire and even the risk of the locking wire 30 breaking during extraction.

[0036] Third: Before releasing the stent, the release ball at the end of the storage tube must be unlocked first, then the guide wire is inserted, and finally the membrane tube is pushed out of the storage tube. The operation has many steps and is relatively complicated.

[0037] Fourth: The delivery system has side holes on the release ball and the receiving tube. When in use, the guide wire is first inserted into the pyloric orifice under the guidance of the gastroscope, then the gastroscope is withdrawn, and finally the release ball and the side holes of the receiving tube are matched with the guide wire so that the receiving tube of the delivery system can be guided into the pyloric orifice along the guide wire during insertion. Due to the side hole guidance, it is difficult for the receiving tube to enter the pyloric orifice during actual operation.

[0038] In order to overcome the above problems, the present invention provides a delivery device, such as Figure 1-7 As shown, it comprises a storage tube 20, an outer tube 50 and a handle 60 which are fixedly connected in sequence, an inner slide bar is arranged in the outer tube 50, and one end of the inner slide bar passes through the handle 60 and is connected to a handle 70;

[0039] The end of the storage tube 20 away from the outer tube 50 is provided with a release ball 10, and a support push block 80 is provided inside the storage tube 20, and the support push block 80 is fixedly connected to the internal slide rod;

[0040] A locking assembly for locking or releasing the release ball 10 is provided on one side of the inner slide bar, and the locking assembly includes a locking wire 30, a fixed shaft relatively fixed to the outer tube 50, and a rotating hook 110 that can rotate with the fixed shaft as an axis, one end of the locking wire 30 is fixedly connected to the release ball 10, and the other end is provided with a coil sleeved on the rotating hook 110, a boss 1102 is provided on the side of the rotating hook 110 close to the inner slide bar, and an unlocking boss 901 is provided on the inner slide bar, which can push the boss 1102 to make the rotating hook 110 rotate around the fixed shaft, thereby disengaging the locking wire 30 from the rotating hook 110;

[0041] The handle 70, the internal slide rod and the release ball 10 are all provided with guide wire holes for the guide wire to pass through.

[0042] In the present application, the handle 70 is used to control the internal slide rod to slide axially along the conveying device, so that the unlocking boss 901 can push the boss 1102 to move to one side, thereby causing the rotating hook 110 to rotate in a plane passing through the axis of the storage tube 20, thereby causing the coil of the locking line 30 to detach from the rotating hook 110, thereby achieving the release of the ball 10 and the separation of the rotating hook 110.

[0043] In the present application, when the delivery device is in a locked state, the wire loop on the locking wire 30 is sleeved on the rotating hook 110. When the internal sliding rod 90 is pushed, the boss 1102 drives the rotating hook 110 to rotate, and the wire loop on the locking wire 30 is detached from the rotating hook 110, thereby unlocking the product. Since the locking wire 30 is changed from a reciprocating type to a detachable type in the present application, on the one hand, the length of the locking wire 30 is greatly reduced, and the locking wire 30 can be shortened to less than 0.15 meters. On the other hand, when unlocking, it is no longer necessary to pull out the locking wire 30. The unlocking can be achieved by pushing the handle 70 to slide the internal sliding rod 90, which simplifies the unlocking action, helps to reduce the doctor's operation time, and at the same time avoids the risk of surgical failure caused by wire breakage when pulling out the locking wire 30.

[0044] In addition, since the locking wire 30 does not need to pass through the inner cavity of the conveyor, there is no need to set up two channels, and only one guide wire perforation for the guide wire to pass through is required.

[0045] It should be noted that, in some embodiments, the cylindrical end of the release ball 10 is loaded into the storage tube 20, and there is a clearance fit between the cylindrical end and the storage tube 20; the internal sliding rod 90 can be embedded and fixed inside the bracket push block 80, and the connection method can be one-piece injection molding, glue connection, etc.; the internal sliding rod 90 can be embedded and fixed inside the handle 70, and the connection method can be one-piece injection molding, glue connection, etc.; the bracket push block 80 is embedded in the storage tube 20 and can slide freely along the inner cavity of the storage tube 20.

[0046] In an optional embodiment, a connecting cap 40 is further provided between the outer tube 50 and the receiving tube 20 , and one end of the connecting cap 40 is fixedly connected to the outer tube 50 , and the other end of the connecting cap 40 is fixedly connected to the receiving tube 20 .

[0047] The connection between the connection cap 40 and the outer tube 50 and the receiving tube 20 can be glue bonding, threaded connection or mechanical press-in connection.

[0048] In an optional embodiment, the rotating hook 110 is disposed in the connecting cap 40 , and the fixing shaft is disposed on an inner wall of the connecting cap 40 .

[0049] Specifically, in some embodiments, a fixed shaft can be provided on the rotating hook 110, and a fixing hole for installing the fixed shaft can be provided on the connecting cap 40; in other embodiments, a fixing hole can be provided on the rotating hook 110, and a fixed shaft capable of passing through the fixing hole can be provided on the connecting cap 40.

[0050] In an optional embodiment, the rotating hook 110 includes a hook-shaped end 1101 capable of hooking the coil and a rotating end for setting a fixed axis, the boss 1102 is arranged between the hook-shaped end 1101 and the rotating end, and a locking groove 1103 capable of accommodating the unlocking boss 901 is arranged between the boss 1102 and the rotating end.

[0051] When the conveying device is in a locked state, the unlocking boss 901 is accommodated in the locking groove 1103; when the conveying device needs to be unlocked, the unlocking boss 901 gradually pushes the boss 1102 under the drive of the internal slide rod, so that the rotating hook 110 rotates around the rotating end.

[0052] In an optional embodiment, a pressing member 100 is further provided between the rotating hook 110 and the inner wall of the connecting cap 40 for pressing the rotating hook 110 toward the bending direction of the hook-shaped end 1101 .

[0053] Since the radial width of the rotating hook 110 is smaller than the gap width between the inner slide bar and the outer tube 50, the rotating hook 110 may shake when subjected to external force vibration, which may cause the locking line 30 to detach from the rotating hook 110. Therefore, a pressing member 100 is also provided in this embodiment to prevent the rotating hook 110 from shaking uncontrollably. In some embodiments, the pressing member 100 may be a spring or a rubber block, and the pressing member 100 is fixed on the inner wall of the outer tube 50 to squeeze the rotating hook 110 to maintain the stability of the rotating hook 110. When unlocking is required, the unlocking boss 901 only needs to overcome the elastic force of the pressing member 100 driven by the inner slide bar, and the boss 1102 can be gradually pushed to rotate the rotating hook 110 around the rotating end.

[0054] In an optional embodiment, if Figure 3 As shown, an unlocking boss limit block 902 is also included, and the unlocking boss limit block 902 is located on a side of the unlocking boss 901 away from the boss 1102.

[0055] The unlocking boss limit block 902 can limit the unlocking boss 901 so that the initial position of the unlocking boss 901 is located in the unlocking locking groove 1103, which is helpful for estimating the sliding distance required for the internal sliding rod to slide when unlocking. Specifically, the unlocking boss limit block 902 can be fixed to the connecting cap 40.

[0056] In an optional embodiment, the hook-shaped end 1101 includes a first arcuate surface 1104 and a second arcuate surface 1105 that can abut against the coil, and the first arcuate surface 1104 and the second arcuate surface 1105 are tangent to each other and have opposite bending directions;

[0057] Preferably, the radians of the first curved surface 1104 and the second curved surface 1105 are (5-7)Π / 15.

[0058] The rotating hook 110 of the present application adopts an easily separable structure of two tangent arcs at the position where it contacts the coil of the locking wire 30. The end of the rotating hook 110 that contacts the wire is approximately the splicing of two 1 / 5 arcs, and the radius of the arc can be the same as the radius of the coil on the locking wire 30. This structure can cause the locking wire 30 to be subjected to a component force tangential to the direction of the second arc when the boss 1102 of the rotating hook 110 is pushed by the unlocking boss 901, so that the coil of the locking wire 30 will automatically slide off the rotating hook 110 when the boss 1102 of the rotating hook 110 is pushed by the unlocking boss 901, thereby achieving automatic unlocking, and there will be no situation where the coil is stuck on the rotating hook 110 and cannot be unlocked.

[0059] In an optional embodiment, the guide wire perforations are coaxially arranged with the receiving tube 20 and the outer tube 50 .

[0060] Compared with the aforementioned known methods, the locking wire 30 is changed from a whole section to a small detachable structure, and the locking wire 30 no longer needs to pass through two inner cavities to form a U-shape, and the channels occupied by the locking wire 30 are reduced from two to one, and the original central channel can be used for the guide wire to pass. Since the central channel is no longer occupied by the locking wire 30, the delivery system is inserted in a modified manner from a side hole guidance method to a central guidance method, which can effectively reduce the difficulty of device insertion.

[0061] In an optional embodiment, a coated stent (not shown in the figure) is also provided on the stent pushing block 80, and the coated stent is connected to the release ball 10 through a soluble inner core.

[0062] The release ball 10 and the stent are connected by a dissolvable inner core (similar to a pin used in mechanical connection). Before the inner core dissolves, the release ball 10 is connected to the stent to drive the membrane tube on the stent to unfold in the human intestine; after the inner core dissolves, the release ball 10 is separated from the stent.

[0063] An embodiment of the present invention also provides a delivery system, comprising a gastroscope, a guidewire and a delivery device as described in any of the aforementioned embodiments, wherein the gastroscope is used to allow the guidewire to pass through the guidewire perforation and place the guidewire to a specified position, and after the gastroscope is withdrawn, the guidewire cooperates with the guidewire perforation of the release ball 10 of the delivery device and guides the movement of the delivery device.

[0064] 1) Implementation of the locked state: such as Figure 1-3 As shown, the system is connected as follows Figure 1As mentioned above, the so-called locked state means that the release ball 10 remains fixed at the end of the storage tube 20 and cannot be separated by external force. In order to achieve the locked state, the present application relies on one end of the locking wire 30 to connect the release ball 10, and the coil at the other end hooks the hook-shaped end 1101 of the rotating hook 110. In the locked state, the unlocking boss 901 of the internal sliding rod 90 is in the locking groove 1103 of the rotating hook 110, and the rotating hook 110 is tightly hooked by the pressure of the compression spring. At the same time, it should be noted that the handle 70 and the internal sliding rod 90 do not play any role in the locked state.

[0065] 2) Implementation of central guidance: Since the present invention provides guidewire perforations in both the release ball 10 and the delivery system, a small-diameter guidewire can be first inserted into the digestive tract through a gastroscope, and then the gastroscope is removed. Finally, the release ball 10 and the internal cavity of the delivery system are inserted into the guidewire, thereby realizing central guidance.

[0066] 3) Unlock state realization: along Figure 3 The handle 70 is pushed to the left in the direction of the handle 70, and the handle 70 drives the internal sliding rod 90 to move to the left, and the unlocking boss 901 of the internal sliding rod 90 slides to the left, thereby gradually contacting the boss 1102 on the rotating hook 110, and finally the rotating hook 110 rotates clockwise around the fixing pin. When the rotating hook 110 rotates, the hook-shaped end 1101 of the rotating hook 110 gradually separates from the coil, and the locking line 30 connected to the release ball 10 is disengaged from the rotating hook 110, thereby achieving unlocking ( Figure 5 It is worth noting that the hook portion of the rotating hook 110 is designed with a structure of tangent arcs at both ends, and the arc surface is sheathed with the coil on the locking line 30, which is a structure that is easy to unhook the locking line 30 ( Figure 6 ).

[0067] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0068] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A conveying device, characterized in that: It comprises a storage tube, an outer tube and a handle which are fixedly connected in sequence, wherein an inner slide bar is arranged inside the outer tube, and one end of the inner slide bar passes through the handle and is connected to a handle; A release ball is arranged at one end of the storage tube away from the outer tube, a support push block is arranged inside the storage tube, and the support push block is fixedly connected to the internal slide rod; A locking assembly for locking or releasing the release ball is provided on one side of the inner slide bar, the locking assembly comprising a locking wire, a fixed shaft fixed relatively to the outer tube, and a rotating hook capable of rotating about the fixed shaft, one end of the locking wire is fixedly connected to the release ball, and the other end is provided with a coil sleeved on the rotating hook, a boss portion is provided on one side of the rotating hook close to the inner slide bar, and an unlocking boss is provided on the inner slide bar, which can push the boss to make the rotating hook rotate around the fixed shaft, thereby disengaging the locking wire from the rotating hook; The handle, the internal slide rod and the release ball are all provided with guide wire holes for the guide wire to pass through.

2. The conveying device according to claim 1, characterized in that A connecting cap is also provided between the outer tube and the receiving tube, one end of the connecting cap is fixedly connected to the outer tube, and the other end of the connecting cap is fixedly connected to the receiving tube.

3. The conveying device according to claim 2, characterized in that: The rotating hook is arranged in the connecting cap, and the fixing shaft is arranged on the inner wall of the connecting cap.

4. The conveying device according to claim 3, characterized in that: The rotary hook comprises a hook end capable of hooking the coil and a rotating end for setting a fixed shaft, the boss portion is arranged between the hook end and the rotating end, and a locking groove capable of accommodating the unlocking boss is arranged between the boss portion and the rotating end.

5. The conveying device according to claim 4, characterized in that: A pressing piece is also provided between the rotating hook and the inner wall of the connecting cap for pressing the rotating hook toward the bending direction of the hook-shaped end.

6. The conveying device according to claim 4, characterized in that It also includes an unlocking boss limiting block, and the unlocking boss limiting block is located on a side of the unlocking boss away from the boss portion.

7. The conveying device according to claim 4, characterized in that The hook-shaped end comprises a first arcuate surface and a second arcuate surface capable of abutting against the coil, wherein the first arcuate surface and the second arcuate surface are tangent to each other and have opposite bending directions; Preferably, the curvature of the first curved surface and the second curved surface is (5-7)Π / 15.

8. The conveying device according to claim 1, characterized in that: The guide wire perforations are coaxially arranged with the receiving tube and the outer tube.

9. The conveying device according to claim 1, characterized in that: The stent push block is also provided with a coated stent, and the coated stent is connected to the release ball via a dissolvable inner core.

10. A conveying system, characterized in that: It comprises a gastroscope, a guidewire and a conveying device as described in any one of claims 1 to 9, wherein the gastroscope is used to allow the guidewire to pass through the guidewire perforation and place the guidewire to a designated position, and after the gastroscope is withdrawn, the guidewire cooperates with the guidewire perforation of the conveying device for releasing a ball and guides the movement of the conveying device.

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