Delivery device for occluder and method of delivering an occluder
By incorporating a visual inner lumen observation tube wall and scale in the occluder delivery device, the problem of biodegradable material occluders being undetectable in vivo has been solved, achieving accurate positioning of the occluder, improving safety, and reducing surgical risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI SHAPE MEMORY ALLOY
- Filing Date
- 2023-06-28
- Publication Date
- 2026-05-29
AI Technical Summary
Existing biodegradable occluders cannot be visualized during in vivo delivery, leading to a high risk of surgical failure and making it impossible to accurately determine their location.
An occluder delivery device was designed, including a guide, a loader, and a pusher. The loading tube is equipped with an observation tube wall and scales for visualizing the inner lumen. The scales and markings facilitate the operator's observation of the occluder's delivery process from outside the body. The position of the occluder can be calculated by combining the scale measurements, achieving accurate positioning without the need for imaging techniques.
It reduces the risk of occlusion failure, improves the safety and accuracy of the surgery, enables external visualization, and reduces reliance on ultrasound-assisted methods.
Smart Images
Figure CN116849729B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cardiac occluder delivery device technology, and more particularly to an occluder delivery device and a delivery method for the occluder. Background Technology
[0002] Closure surgery involves sealing the septal defect in the atrial appendage with an occluder to prevent thrombus formation during atrial fibrillation, thereby reducing the risk of long-term disability or death due to thromboembolism in atrial fibrillation patients. An occluder delivery device is required during delivery to the atrial appendage. Currently, because biodegradable occluders are not visible in vivo, it is impossible to determine the location of the biodegradable occluder during delivery, leading to a significant risk of surgical failure.
[0003] Therefore, there is an urgent need for a new plug delivery device and a new method for delivering the plug. Summary of the Invention
[0004] The first aspect of this application provides a plugging device delivery apparatus, comprising:
[0005] The guide includes a guide sheath and a first connector assembly disposed proximal to the guide sheath;
[0006] The loader includes a loading tube and a second connector assembly disposed at the proximal end of the loading tube. A first tube segment at the distal end of the loading tube is connected to the first connector assembly, and a guide sheath communicates with the loading tube to form a channel for delivering the plug to the target release area of the plug. The loading tube has an observation tube wall with a visible inner lumen, and a scale is provided on the loading tube along the axial direction of the loading tube. The scale is visible through the observation tube wall.
[0007] The pusher is used to push the occluder through the channel to the target release area of the occluder. The pusher includes a connected connector and a push rod. The connector is used to connect to the occluder. The push rod is marked with a first mark. The distance from the first mark to the far end of the connector is L1. The total length of the guide is L2, where L2 is equal to L1.
[0008] The first aspect of this application provides an occluder delivery device. This device features a visual observation tube wall and graduations on the loading tube, allowing the operator to observe the pushing process of the pusher rod from outside the body. When the occluder is loaded into the loading tube, the lengths of the various shaped parts of the occluder in their extended state and the overall length of the occluder in its fully extended state can be pre-measured by observing the tube wall and graduations. During the process of pushing the occluder outward from the guide sheath of the guide device to the target release area,
[0009] Since the distance L1 from the first mark in the push rod to the distal end of the connector is equal to the total length of the guide, when the occluder is not fully released outside the guide, the operator can observe the location of the first mark and its corresponding scale number by observing the tube wall. Combined with the lengths of the different parts of the occluder in the extended state measured when the occluder is loaded, and the length of the entire occluder in the fully extended state, the structure of the occluder that has been released outside can be easily calculated. Thus, the specific delivery position of the occluder can be determined without the need for imaging techniques and ultrasound assistance, thereby reducing the risk of occlusion failure and improving the safety and accuracy of the procedure.
[0010] In some optional embodiments of the first aspect of this application, the cargo tube is provided with a second mark, the distance from the second mark to the distal end of the cargo tube is L3, the length of the first tube segment is also L3, and the second mark is flush with the proximal end of the first connector assembly.
[0011] In some optional embodiments of the first aspect of this application, the observation tube wall is a hollow cylinder, and the scale is set on the outer or inner wall surface of the observation tube wall.
[0012] In some optional embodiments of the first aspect of this application, the observation tube wall is made of a transparent material.
[0013] In some optional embodiments of the first aspect of this application, the observation tube wall is a hollow semi-cylindrical shape, and the carrying tube also has a non-observation tube wall. The observation tube wall and the non-observation tube wall are joined together in the circumferential direction of the carrying tube to form the carrying tube. The observation tube wall is made of transparent material, and an opaque substrate is formed on the inner wall surface of the non-observation tube wall.
[0014] The second aspect of this application provides a method for conveying a plugging device, wherein the plugging device is conveyed to a target release area using the plugging device conveying device described in the first aspect of this application. The target release area includes a structure to be plugged with a through hole. The conveying method includes:
[0015] The plugging device is loaded, and a pusher that penetrates the loader is connected to the distal end of the loader. The plugging device is pulled into the loading tube by moving the pusher. During the process of the plugging device being pulled into the loading tube, the scale readings at the head and tail of each part of the plugging device in the extended state are observed by observing the tube wall to obtain the length of different parts of the plugging device in the extended state inside the loading tube and the length of the plugging device in the fully extended state.
[0016] When the plug is fully pulled into the loading tube, observe the scale corresponding to the far end of the plug to obtain the distance from the far end of the plug to the far end of the loading tube. When the distance from the far end of the plug to the far end of the loading tube is equal to the length of the first tube segment, stop pulling the pusher, keep the relative position between the pusher and the loading tube unchanged, and record the starting position of the connection between the plug and the connector on the loading tube at this time to complete the plug loading.
[0017] Connect the loader and the guide so that the first pipe section is fully inserted into the first connector assembly, with the distal end of the plug flush with the proximal end of the first connector assembly;
[0018] Push the plug into the guide sheath, move the pusher to the distal end of the guide sheath so that the plug enters the guide sheath from the loading tube. Observe the change of the scale corresponding to the first mark during the movement of the tube wall. When the scale corresponding to the first mark is equal to the scale corresponding to the connection between the plug and the connector in the step of connecting the loader and the guide, the distal end of the plug is flush with the distal end of the guide sheath and the plug is inside the guide sheath.
[0019] Release the plug, with the guide sheath inserted into the through hole and the distal end of the guide at least flush with the distal end of the through hole. Continue to move the pusher to the distal end of the guide, and observe the change in the scale corresponding to the movement of the first mark by observing the tube wall. When the distance the first mark moves is equal to the length of the first disc in the extended state, stop moving the pusher and pull the guide from the proximal end of the guide so that the plug is completely released from the guide sheath to the target release area of the plug. The first disc is the part of the plug that is pre-locked on the proximal end of the through hole.
[0020] The second aspect of this application provides a method for delivering an occluder, which can deliver the occluder to a closed, non-permeable area (such as human heart tissue) without the need for ultrasound assistance or imaging. The method can accurately deliver the occluder to the target location without the need for ultrasound assistance or imaging. With the coordinated design of the scale on the carrier and the markings on the occluder delivery device, it can achieve visualized operation in vitro.
[0021] In some optional embodiments of the second aspect of this application, the step of loading the occluder includes:
[0022] The pusher is inserted through the cargo tube with the connector extending beyond the distal end of the cargo tube. After the occluder is connected to the connector, the occluder is pulled into the lumen of the cargo tube by moving the pusher towards the proximal end of the cargo tube.
[0023] By observing the tube wall, it was determined that the first disc entered the lumen of the carrying tube and was in an extended state. The first and second scale readings corresponding to the head and tail of the first disc were read respectively. Based on the first and second scale readings, the length of the first disc in the extended state was determined to be L4.
[0024] By observing the tube wall, we can see that the plug is fully inserted into the lumen of the loading tube and is in a fully extended state. The distal end of the plug is flush with the distal end of the loading tube. We can read the third and fourth scale values corresponding to the head and tail of the plug respectively, and obtain the length L5 of the plug in the fully extended state based on the third and fourth scale values.
[0025] When the pusher stops being pulled, the distance L6 between the connection point of the plug and the connector and the far end of the loading tube is obtained by using the fifth scale corresponding to the starting position.
[0026] In some optional embodiments of the second aspect of this application, in the step of connecting the loader and the guide,
[0027] The length of the section into which the loading tube is inserted into the first connector assembly is L3, where L1+L5=L2+L6-L3.
[0028] In some optional embodiments of the second aspect of this application, in the step of pushing the occluder into the guide sheath, when the scale number corresponding to the first mark is the fifth scale number, the first mark is in the starting position, the distal end of the occluder is flush with the distal end of the guide sheath and the occluder is inside the guide sheath.
[0029] In some optional embodiments of the second aspect of this application, prior to the step of connecting the loader and the guide, the guide is inserted into the through hole such that the distal end of the guide is at least flush with the distal end of the through hole.
[0030] In some optional embodiments of the second aspect of this application, the step of releasing the occluder includes:
[0031] The first marker moves a distance of L7, where L7 = L4. This distance is equal to the length of the first disk in its extended state.
[0032] At this point, all portions of the occluder located on the left side of the first disc have been released to the outside of the distal end of the guide sheath. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the structure of the guide in the plug delivery device provided in the first aspect of this application;
[0034] Figure 2 This is a schematic diagram of the structure of the loader in the plug delivery device provided in the first aspect of this application.
[0035] Figure 3 This is a schematic diagram of the pusher in the plug delivery device provided in the first aspect of this application;
[0036] Figure 4 This is a schematic diagram of the structure of the plugger delivery device before the guide, loader and pusher are assembled, as provided in the first aspect of this application.
[0037] Figure 5 This is a schematic diagram of a plugging device in an unextended state.
[0038] Figure 6 This is a schematic diagram of step S12 in step S10 of loading the plugging device;
[0039] Figure 7 This is a schematic diagram of step S13 in step S10 of loading the plugging device;
[0040] Figure 8 This is a schematic diagram of step S14 in step S10 of loading the plugging device;
[0041] Figure 9 This is a schematic diagram of step S20, which connects the loader and the guide.
[0042] Figure 10 This is a schematic diagram of step S30, which involves pushing the occluder into the guide sheath.
[0043] Figure 11 This is a schematic diagram of the first stage of the process in step S40 of releasing the plug;
[0044] Figure 12 This is a schematic diagram of the second stage of the process in step S40 of releasing the plug.
[0045] Explanation of reference numerals in the attached figures:
[0046] Guide device-1; Guide sheath-11; First connector assembly-12; First silkscreen marking-121; First three-way valve-13; Loader-2; Loading tube-21; Second marking-211; First pipe section-212; Observation pipe wall-213; Second connector assembly-22; Second silkscreen marking-221; Second three-way valve-23;
[0047] Pusher-3; Connector-31; Push rod-32; First marker-321; Operating handle-33;
[0048] Plug-4; First disc-41; Waist section-42; Second disc-43; Threaded anchor head-44;
[0049] Structure to be sealed - 5; Through hole - 51. Detailed Implementation
[0050] The following will be combined with the appendix Figure 1 To be continued Figure 12 The technical solution of this application is described in detail.
[0051] like Figures 1 to 4 As shown, the first aspect of this application provides a sealing device 4 delivery device, comprising:
[0052] Guide 1 includes a guide sheath 11 and a first connector assembly 12 disposed at the proximal end of the guide sheath 11;
[0053] The loader 2 includes a loading tube 21 and a second connector assembly 22 disposed at the proximal end of the loading tube 21. The first tube segment 212 at the distal end of the loading tube 21 is connected to the first connector assembly 12, and the guide sheath 11 communicates with the loading tube 21 to form a channel for transporting the plugger 4 to the target release area of the plugger 4. The loading tube 21 has an observation tube wall 213 with a visible inner lumen. Scales are provided on the loading tube 21 along the axial direction of the loading tube 21, and the scales are visible through the observation tube wall 213.
[0054] Pusher 3 is used to push occluder 4 through the channel to the target release area of occluder 4. Pusher 3 includes a connected connector 31 and a push rod 32. Connector 31 is used to connect to occluder 4. Push rod 32 is set with a first mark 321. The distance from the first mark 321 to the far end of connector 31 is L1. The total length of guide 1 is L2, where L2 is equal to L1.
[0055] The first aspect of this application provides a delivery device for the occluder 4. This device features an observation wall 213 and scale on the loading tube 21, allowing the operator to observe the pushing process of the pusher rod 32 in the pusher 3 externally. When the occluder 4 is loaded into the loading tube 21, the lengths of the various parts of the occluder 4 in their extended state and the overall length of the occluder 4 in its fully extended state can be pre-measured by observing the wall and scale. During the process of pushing the occluder 4 outward from the guide sheath 11 of the guide device 1 to the target release area,
[0056] Since the distance L1 from the first mark 321 in the push rod 32 to the far end of the connector 31 is equal to the total length of the guide 1, when the occluder 4 is not fully released outside the guide 1, the operator can observe the location of the first mark 321 and the corresponding scale number by observing the tube wall 213. Combined with the length of the different parts of the occluder 4 in the extended state measured when loading the occluder 4 and the length of the entire occluder 4 in the fully extended state, the structure of the occluder 4 that has been released outside can be easily calculated, thereby knowing the specific delivery position of the occluder 4. Thus, the specific delivery position of the occluder 4 can be determined without the need for imaging technology and ultrasound assistance, which can realize the external visualization operation and delivery of the occluder 4, reduce the risk of failure of the occlusion procedure, and improve the safety and accuracy of the operation.
[0057] It should be noted that in this application, the end of each part of the delivery device of the occluder 4 that is closer to the operator during the occlusion procedure is called the proximal end, and the end that is farther away from the operator and closer to the patient is called the distal end.
[0058] In some optional embodiments of the first aspect of this application, the first connector assembly 12 of the guide device 1 is formed by welding and crimping a connector nut, a connector seat, a sealing hemostatic pad, and a connector cap, achieving a sealing and hemostatic effect. The first connector assembly 12 is also provided with a first silkscreen marking 121 to indicate the model of the guide device 1, facilitating its compatibility with the loader 2 and pusher 3 when subsequently assembled into a delivery device for the occluder 4. The first connector assembly 12 is connected to a first three-way valve 13, and the guide sheath 11 is connected to external instruments through the first three-way valve 13, facilitating the injection of medications or gases required at different stages of the occlusion procedure.
[0059] In some optional embodiments of the first aspect of this application, the second connector assembly is also provided with a second silkscreen mark 221, and the second connector assembly is connected to the second three-way valve 23.
[0060] In some optional embodiments of the first aspect of this application, the connector 31 in the pusher 3 is a threaded connector 31 for threaded connection with the threaded anchor head 44 of the occluder 4. The pusher rod 32 is a steel cable rod. An operating handle 33 is provided at the other end of the pusher rod 32 opposite to the connector 31, and the operator can hold the operating handle 33 during the operation to manipulate the pusher 3 to move back and forth in the guide 1 and / or the loader 2.
[0061] In some optional embodiments of the first aspect of this application, the loading tube 21 is provided with a second mark 211, the distance from the second mark 211 to the distal end of the loading tube 21 is L3, the length of the first tube segment 212 is also L3, and the second mark 211 is flush with the proximal end of the first connector assembly 12. In these embodiments, the first tube segment 212 is connected to the first connector assembly 12. After the occluder 4 delivery device is assembled, the first tube segment 212 is inserted into the connector seat of the first connector assembly 12, and the first tube segment 212 and the scale on the first tube segment 212 are not visible. The function of the second mark 211 is to position the occluder 4 that has entered the loading tube 21 during the loading process of the occluder 4, so that the distal end of the occluder 4 is at the position of the second mark 211. This facilitates the operator in quickly determining, externally, when the distal end of the occluder 4 is flush with the distal end of the guide sheath 11 based on the scale number corresponding to the first mark 321 and the relationship that L2 equals L1 during the process of pushing the occluder 4 into the guide sheath 11.
[0062] In some optional embodiments of the first aspect of this application, the observation tube wall 213 is a hollow cylinder, and the scale is set on the outer or inner wall surface of the observation tube wall 213.
[0063] In some optional embodiments of the first aspect of this application, the observation tube wall 213 is made of a transparent material. This transparent material is a transparent polymer material, such as polyethylene (PE), polytetrafluoroethylene (PTFE), polyamide (PA), etc.
[0064] In some optional embodiments of the first aspect of this application, the observation tube wall 213 is a hollow semi-cylindrical shape, and the carrying tube 21 also has a non-observation tube wall 213. The observation tube wall 213 and the non-observation tube wall 213 are joined together in the circumferential direction of the carrying tube 21 to form the carrying tube 21. The observation tube wall 213 is made of a transparent material, and an opaque substrate is formed on the inner wall surface of the non-observation tube wall 213. In these embodiments, the non-observation tube wall 213 is also a hollow semi-cylindrical shape.
[0065] In some examples of these embodiments, the scale is set on the inner wall surface of the non-observation tube wall 213. The scale on the non-observation tube wall 213 can be seen through the observation tube wall 213. Since an opaque substrate is formed on the inner wall surface of the non-observation tube wall 213, the operator can observe the scale more clearly and accurately during the observation process, avoiding the influence of external ambient light on the observation.
[0066] In other examples of these embodiments, the scale is set on the observation wall. Since an opaque substrate is formed on the inner wall of the non-observation tube 213, the operator can observe the scale more clearly and accurately during the observation process, avoiding the influence of external ambient light on the observation.
[0067] like Figure 5 As shown, the occluder 4 has an extendable mesh body and includes a threaded anchor head 44 threadedly connected to the connector 31, a first disc 41, a waist section 42, and a second disc 43. When the pusher 3 loads the occluder 4 into the loading tube 21, the operator applies a pulling force to the occluder 4 towards the proximal end of the loading tube 21. The first disc 41, waist section 42, and second disc 43 in the occluder 4 gradually change from their original state to an extended state, elongating axially in the loading tube 21.
[0068] The second aspect of this application provides a method for conveying a plugging device 4, wherein the plugging device 4 is conveyed to a target release area of the plugging device 4 using the conveying device provided in the first aspect of this application. The target release area of the plugging device 4 includes a structure 5 to be plugged having a through hole 51. The conveying method includes:
[0069] like Figures 6 to 8As shown, S10: Loading the plugging device 4, connecting the plugging device 4 to the pusher 3 penetrating the loader 2 at the far end of the loader 2, and pulling the plugging device 4 into the loading tube 21 by moving the pusher 3. During the process of the plugging device 4 being pulled into the loading tube 21, observing the corresponding scale values at the head and tail of each part of the plugging device 4 in the extended state through the observation tube wall 213, so as to obtain the length of different parts of the plugging device 4 in the extended state in the loading tube 21 and the length of the plugging device 4 in the fully extended state.
[0070] When the plug 4 is fully pulled into the loading tube 21, observe the scale corresponding to the far end of the plug 4 to obtain the distance from the far end of the plug 4 to the far end of the loading tube 21. When the distance from the far end of the plug 4 to the far end of the loading tube 21 is equal to the length L3 of the first tube segment 212, stop pulling the pusher 3, keep the relative position between the pusher 3 and the loading tube 21 unchanged, and record the starting position of the connection between the plug 4 and the connector 31 on the loading tube 21 at this time, thus completing the loading of the plug 4.
[0071] Step S10 of loading the plugging device 4 includes:
[0072] S11: Pass the pusher 3 through the cargo tube 21 and make the connector 31 extend out of the far end of the cargo tube 21. After the blocker 4 is connected to the connector 31, the blocker 4 is pulled into the lumen of the cargo tube 21 by moving the pusher 3 towards the proximal end of the cargo tube 21.
[0073] S12: As Figure 6 As shown, by observing the tube wall 213, the first disc 41 enters the cavity of the carrying tube 21 and is in an extended state. The first and second scale numbers corresponding to the head and tail of the first disc 41 are read respectively. Based on the first and second scale numbers, the length of the first disc 41 in the extended state is L4.
[0074] S13: As Figure 7 As shown, by observing the tube wall 213, it can be seen that the plug 4 is fully inserted into the lumen of the loading tube 21 and is in a fully extended state. The distal end of the plug 4 is flush with the distal end of the loading tube 21. The third and fourth scale values corresponding to the head and tail of the plug 4 are read respectively. The length L5 of the plug 4 in the fully extended state is obtained based on the third and fourth scale values.
[0075] S14: As Figure 8 As shown, when the pusher 3 is stopped, the distance L6 between the connection point of the plug 4 and the connector 31 and the far end of the loading tube 21 is obtained by the fifth scale number corresponding to the starting position.
[0076] S20: As Figure 9As shown, the loader 2 is connected to the guide 1 so that the first pipe section 212 is fully inserted into the first connector assembly 12, and the distal end of the plug 4 is flush with the proximal end of the first connector assembly 12.
[0077] In some examples, in step S20, when connecting the loader 2 and the guide 1, the length of the section of the loading tube 21 inserted into the first connector assembly 12 is L3, where L1+L5=L2+L6-L3.
[0078] S30: As Figure 10 As shown, the plugger 4 is pushed into the guide sheath 11, and the pusher 3 is moved to the distal end of the guide sheath 11 so that the plugger 4 enters the guide sheath 11 from the loading tube 21. By observing the change of the scale number corresponding to the first mark 321 during the movement of the tube wall 213, when the scale number corresponding to the first mark 321 is equal to the scale number corresponding to the connection point between the plugger 4 and the connector 31 in the step of connecting the loader 2 and the guide 1, the distal end of the plugger 4 is flush with the distal end of the guide sheath 11 and the plugger 4 is inside the guide sheath 11.
[0079] In some examples, during the step of pushing the occluder 4 into the guide sheath 11, when the scale number corresponding to the first mark 321 is the fifth scale number, the first mark 321 is in the starting position, the distal end of the occluder 4 is flush with the distal end of the guide sheath 11 and the occluder 4 is inside the guide sheath 11.
[0080] like Figure 11 and Figure 12 As shown, S40: Release the plug 4, the guide sheath 11 is in the state of penetrating the through hole 51 and the distal end of the guide 1 is at least flush with the distal port of the through hole 51. Continue to move the pusher 3 to the distal end of the guide 1. Observe the change of the corresponding scale number of the first mark 321 during the movement by observing the tube wall 213. When the moving distance of the first mark 321 is equal to the length of the first disc 41 in the extended state, stop moving the pusher 3 and pull the guide 1 away from the proximal end of the guide 1 so that the plug 4 is completely released from the guide sheath 11 to the target release area of the plug 4. The first disc 41 is the part of the plug 4 that is pre-locked on the proximal port side of the through hole 51.
[0081] In some examples, before step S20 of connecting loader 2 and guide 1, guide 1 is inserted into through hole 51 so that the distal end of guide 1 is at least flush with the distal port of through hole 51.
[0082] In some examples, in step S40 of releasing the plug 4:
[0083] The first marker 321 moves a distance of L7, where L7 = L4. This distance is equal to the length of the first disk 41 in its extended state.
[0084] At this point, all portions of the occluder 4 located to the left of the first disc 41 have been released to the outside of the distal end of the guide sheath 11. All portions of the occluder 4 located to the left of the first disc 41 include the second disc 43 and the waist section 42. From Figure 12 It is understood that the occluder 4 delivery device provided in this application can achieve external visualization operation by setting a mark at a specific position of the occluder 4 delivery device and adding the observation tube wall and scale formed in the loading tube 21 of the loader 2. During the occlusion procedure, the occluder 4 is measured by the scale and the movement process of the mark is calculated. In the case that the biodegradable occluder 4 is not visible in the body, there is no need for the cumbersome operation of repeatedly judging the position by ultrasound. Moreover, it can be adapted to the external visualization operation process of delivering occluders 4 of different specifications and models, and has universality.
[0085] In some examples of these embodiments, the target release area of the occluder 4 may be an area existing outside the body in a model simulating a septal defect in the middle of the human atrial appendage.
[0086] In other examples of these embodiments, the target release area of the occluder 4 refers to the area in the middle of the atrial appendage of the human heart with a septal defect.
[0087] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A plugging device delivery apparatus, characterized in that, include: The guide includes a guide sheath and a first connector assembly disposed at the proximal end of the guide sheath; The loader includes a loading tube and a second connector assembly disposed at the proximal end of the loading tube. A first tube segment at the distal end of the loading tube is connected to the first connector assembly, and the guide sheath communicates with the loading tube to form a channel for delivering the occluder to the target release area of the occluder. The loading tube has an observation tube wall with a visible inner lumen, and a scale is provided on the loading tube along the axial direction of the loading tube. The scale is visible through the observation tube wall. A pusher is used to push the occluder through the channel to the target release area of the occluder. The pusher includes a connected connector and a push rod. The connector is used to connect to the occluder. The push rod is marked with a first mark. The distance from the first mark to the far end of the connector is L1. The total length of the guide is L2, where L2 is equal to L1. The loading tube is provided with a second mark, the distance from the second mark to the far end of the loading tube is L3, the length of the first tube segment is also L3, and the second mark is flush with the proximal end of the first connector assembly.
2. The plugging device conveying device according to claim 1, characterized in that, The observation tube wall is a hollow cylinder, and the scale is set on the outer or inner wall surface of the observation tube wall.
3. The plugging device conveying device according to claim 1, characterized in that, The observation tube wall is made of transparent material.
4. The plugging device conveying device according to claim 1, characterized in that, The observation tube wall is hollow and semi-cylindrical, and the carrying tube also has a non-observation tube wall. The observation tube wall and the non-observation tube wall are joined together in the circumferential direction of the carrying tube to form the carrying tube. The observation tube wall is made of transparent material, and an opaque substrate is formed on the inner wall surface of the non-observation tube wall.