A surgical delivery device for varicose vein closure
Patent Information
- Application Number
- CN202521219357.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-26
- Estimated Expiration
- 2035-06-13
Smart Images
Figure CN224269354U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a delivery device for varicose vein closure surgery. Background Technology
[0002] Varicose vein adhesive therapy is a minimally invasive procedure that uses a special medical adhesive to precisely close severely affected areas of varicose veins in the lower limbs of patients. It involves minimal surgical trauma, significantly shortens the procedure time, and may even eliminate the need for traditional anesthesia, allowing patients to comfortably and gracefully restore their normal leg shape. Varicose vein adhesive therapy relies on a highly reliable delivery system to precisely and quantitatively deliver the adhesive to specific sites.
[0003] In the prior art, adhesive delivery devices typically use glue guns. The syringe is installed at the head of the glue gun through a slot. The plunger of the glue gun pushes the piston rod of the syringe under the driving action of a wrench. In order to ensure the stability of the plunger, a limiting block is usually set inside the glue gun to limit the plunger.
[0004] However, in the above scheme, the low precision of the limiting block and the poor stability of the push rod and syringe affect the accurate quantitative delivery of adhesive. Utility Model Content
[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problem of poor stability of the adhesive pushing device push rod and syringe in the prior art, thereby providing a delivery device for varicose vein closure surgery.
[0006] To address the aforementioned technical problems, this utility model provides a surgical delivery device for varicose vein closure surgery, comprising: a main body shell, a push rod, a conduit, a positioning block, and a pressure block. The main body shell has an internal mounting cavity, and the head opening of the mounting cavity is provided with a slot for mounting a syringe. The push rod is located at the tail end of the mounting cavity, and the push rod pushes the piston rod of the syringe through a drive assembly. The conduit is located within the mounting cavity, and a guide groove is provided within the conduit for limiting the piston rod of the syringe. The positioning block is located at the rear end of the conduit, and a positioning hole is provided on the positioning block. The push rod passes through the positioning hole and extends into the guide groove to contact the piston rod. The pressure block is located at the rear end of the mounting cavity, and the pressure block clamps the push rod.
[0007] In use, the syringe is secured by a slot in the mounting head. The syringe piston rod extends into the catheter, and a guide groove guides and limits its movement. The piston rod passes through a positioning hole on the positioning block and extends into the guide groove to contact the piston rod. When the drive assembly drives the piston rod towards the syringe, it delivers the adhesive. The precise fit between the positioning block, catheter, and slot improves the stability of the fit between the piston rod and the syringe, thereby enhancing the continuity of the delivery device. The clamping block, by clamping the piston rod from both sides, prevents it from retracting, which is beneficial to the accuracy of quantitative delivery. The varicose vein closure surgery delivery device provided by this invention solves the problem of poor stability in the fit between the piston rod and syringe in existing adhesive delivery devices.
[0008] Optionally, a mounting plate is provided on the outer side of the catheter, and the mounting plate is fixedly connected to the outer shell of the main body by a fastener. The mounting plate is provided with [specific features]. This design increases the stability of the catheter, thereby improving the matching accuracy of the syringe and plunger, which is beneficial to the precision of the quantitative delivery by the delivery device.
[0009] Optionally, the driving component includes: a wrench, rotatably disposed inside the main body housing, the wrench having a first elastic portion, the end of the first elastic portion contacting and engaging with a first limiting post on the main body housing, so that the first elastic portion has an elastic force to drive the wrench to reset towards the outside of the main body housing, the driving end of the wrench having a cylindrical structure; and a locking block, disposed on the wrench, the locking block having a cylindrical space for engaging with the cylindrical structure, the wrench being hinged to the cylindrical space through the cylindrical structure, the locking block having a rack portion and a second elastic portion, the rack portion engaging with the serrated structure of the push rod, the second elastic portion having an elastic force to drive the rack portion closer to the push rod. With the above configuration, under the elastic force of the second elastic part, the rack part of the locking block and the sawtooth structure of the push rod are kept in meshing connection. When the wrench is pressed and rotated, the cylindrical structure of the wrench drive end rotates in the cylindrical space of the locking block and drives the locking block to move forward. The rack part pushes the push rod to move towards the syringe. When the wrench is released from pressure, under the elastic force of the first elastic part, the wrench is driven to reset, preparing for the next injection.
[0010] Optionally, a second limiting post is provided inside the outer casing of the main body, which is used to form a blocking engagement with the wrench. Through this arrangement, the second limiting post restricts the stroke of the wrench, preventing excessive displacement and thus achieving quantitative injection.
[0011] Optionally, the second limiting post is provided with a detachable sleeve. With this configuration, the stroke of the wrench can be changed by replacing sleeves of different sizes, thereby achieving quantitative injection of different doses.
[0012] Optionally, the rack portion has two guide plates spaced apart, and the push rod is disposed between the two guide plates. With this arrangement, the two guide plates can provide limiting guidance for the push rod, preventing the push rod from deviating from the rack portion.
[0013] Optionally, a reset component is rotatably provided on the outer casing. The reset component includes: a connecting portion, the first end of which is rotatably connected to the outer casing; and a pressing portion, disposed at the second end of the connecting portion. The bottom of the pressing portion has a pressing block for contacting and engaging with the locking block. The outer casing has a through hole for exposing the pressing portion. With the above arrangement, when the pressing portion is pressed, the connecting portion rotates around the first end, causing the pressing block on the pressing portion to contact the locking block and push the rack portion of the locking block to disengage from the push rod, thereby allowing the push rod to move backward until it is reset.
[0014] Optionally, a protective cap is provided on the top of the pressing part, and the protective cap has a brim extending in the radial direction. The brim forms a blocking fit with the periphery of the through hole. With the above arrangement, it is possible to prevent foreign objects from entering through the through hole on the main body shell and affecting the function of the conveying device.
[0015] Optionally, the main body shell includes a first body and a second body, which are connected by a fastener. With the above arrangement, the first body and the second body are detachably connected by the fastener to form the main body shell.
[0016] Optionally, the outer casing of the main body is further provided with a first decorative element and a second decorative element, the first decorative element being snap-fitted onto the bottom of the outer casing of the main body, and the second decorative element being snap-fitted onto the top of the outer casing of the main body. This arrangement improves the aesthetics of the conveying device. Attached Figure Description
[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of one embodiment of the varicose vein closure surgery delivery device provided in this utility model.
[0019] Figure 2 for Figure 1 A cross-sectional schematic diagram;
[0020] Figure 3 for Figure 2 Schematic diagram of the central catheter;
[0021] Figure 4 for Figure 2 A schematic diagram of the positioning block;
[0022] Figure 5 for Figure 2 Schematic diagram of the medium-pressure block;
[0023] Figure 6 for Figure 2 A schematic diagram of the push rod;
[0024] Figure 7 for Figure 2 A schematic diagram of the assembly and mating of the push rod and drive assembly;
[0025] Figure 8 for Figure 2 A diagram of a center wrench;
[0026] Figure 9 for Figure 2 A schematic diagram of the reset component;
[0027] Figure 10 for Figure 2 A schematic diagram of the protective cap;
[0028] Figure 11 for Figure 2 A schematic diagram showing the assembly and mating of the reset component and the protective cap;
[0029] Figure 12 for Figure 1 A schematic diagram of the first body of the vehicle;
[0030] Figure 13 for Figure 1 A schematic diagram of the second body of the vehicle;
[0031] Figure 14 for Figure 1 A schematic diagram of the first decorative element;
[0032] Figure 15 for Figure 1 A schematic diagram of the second decorative element.
[0033] Explanation of reference numerals in the attached figures:
[0034] 1. Main body shell; 11. First body; 12. Second body; 13. First decorative piece; 14. Second decorative piece; 15. First limiting post; 16. Second limiting post; 161. Sleeve post; 17. Through hole; 18. Slot; 2. Push rod; 21. Drive plate; 22. Reinforcing plate; 23. Push plate; 3. Guide tube; 4. Positioning block; 41. Positioning hole; 5. Pressure block; 6. Drive assembly; 61. Wrench; 62. First elastic part; 63. Locking block; 631. Rack part; 632. Second elastic part; 7. Reset part; 71. Connecting part; 72. Pressing part; 73. Pressing block; 8. Protective cap; 81. Cap brim. Detailed Implementation
[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0038] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0039] This embodiment provides a structure for a delivery device for varicose vein closure surgery capable of quantitative injection, used for quantitative delivery of adhesive.
[0040] like Figure 1-5The image shows a specific embodiment of a varicose vein closure surgery delivery device provided in this embodiment, comprising: a main body shell 1, a push rod 2, a conduit 3, a positioning block 4, and a pressure block 5. The main body shell 1 has an internal mounting cavity, and the head opening of the mounting cavity is provided with a slot 18 for mounting a syringe. The push rod 2 is located at the tail end of the mounting cavity, and the push rod 2 pushes the piston rod of the syringe through a drive assembly 6. The conduit 3 is located in the mounting cavity, and the conduit 3 is provided with a guide groove, which is used to limit the piston rod of the syringe. The positioning block 4 is located at the rear end of the conduit 3, and the positioning block 4 has a positioning hole 41. The push rod 2 passes through the positioning hole 41 and extends into the guide groove to contact the piston rod. The pressure block 5 is located at the rear end of the mounting cavity, and the pressure block 5 clamps the push rod 2.
[0041] In use, the syringe is secured by the slot 18 at the head of the mounting cavity. The piston rod 2 of the syringe extends into the catheter 3, and the piston rod is guided and limited by the guide groove. The piston rod 2 passes through the positioning hole 41 on the positioning block 4 and extends into the guide groove to contact the piston rod. When the driving assembly 6 drives the piston rod 2 to move towards the syringe, the adhesive is delivered. The precise cooperation of the positioning block 4, the catheter 3, and the slot 18 improves the stability of the cooperation between the piston rod 2 and the syringe, thereby improving the continuity of the delivery device. The pressure block 5 clamps the piston rod 2 from both sides to prevent it from retracting, which is beneficial to the accuracy of quantitative delivery by the delivery device. The varicose vein closure surgery delivery device provided in this embodiment solves the problem of poor cooperation stability between the piston rod 2 and the syringe in the prior art.
[0042] Specifically, such as Figure 6 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, the push rod 2 includes a drive plate 21, a reinforcing plate 22 and a push plate 23. At least a portion of the drive plate 21 is provided with a serrated structure. The reinforcing plate 22 is arranged perpendicularly to the drive plate 21 to form a T-shaped structure. The push plate 23 is disposed at one end of the push rod 2 near the syringe and is used to contact and cooperate with the piston rod.
[0043] Specifically, such as Figure 4 As shown, in the varicose vein closure surgery delivery device provided in this embodiment, the positioning hole 41 on the positioning block 4 is set as a T-shaped hole, corresponding to the T-shaped structure of the push rod 2.
[0044] Specifically, such as Figure 5As shown, in the varicose vein closure surgery delivery device provided in this embodiment, the pressure block 5 clamps the reinforcing plate 22 of the push rod 2 from both sides through two tensioning plates.
[0045] like Figure 2 , Figure 3 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, a mounting plate is provided on the outer side of the catheter 3. The mounting plate is fixedly connected to the outer shell 1 of the main body through a fixing member. The mounting plate is provided with [features / equipment]. This increases the stability of the catheter 3, thereby improving the matching accuracy of the syringe and the plunger 2, which is beneficial to the accuracy of quantitative delivery by the delivery device. Alternatively, as an alternative embodiment, the mounting plate can be omitted, and a fixing post can be provided on the outer side of the catheter 3. A fixing hole is provided on the outer shell 1 of the main body, and a fixing member passes through the fixing hole and connects to the fixing post.
[0046] like Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, the driving component 6 includes: a wrench 61, rotatably disposed inside the main body shell 1, the wrench 61 having a first elastic part 62, the end of the first elastic part 62 contacting and engaging with a first limiting post 15 on the main body shell 1, so that the first elastic part 62 has an elastic force to drive the wrench 61 toward the outside of the main body shell 1, the driving end of the wrench 61 having a cylindrical structure; a locking block 63, disposed on the wrench 61, the locking block 63 having a cylindrical space for engaging with the cylindrical structure, the wrench 61 being hinged to the cylindrical space through the cylindrical structure, the locking block 63 having a rack part 631 and a second elastic part 632, the rack part 631 engaging with the serrated structure of the push rod 2, the second elastic part 632 having an elastic force to drive the rack part 631 toward the push rod 2. Under the elastic force of the second elastic part 632, the rack part 631 of the locking block 63 is engaged with the serrated structure of the push rod 2. When the wrench 61 is pressed and rotated, the cylindrical structure at the driving end of the wrench 61 rotates within the cylindrical space of the locking block 63, driving the locking block 63 forward. The rack part 631 pushes the push rod 2 toward the direction closer to the syringe. When the pressure on the wrench 61 is released, under the elastic force of the first elastic part 62, the wrench 61 is driven to reset, preparing for the next injection. Alternatively, as an alternative embodiment, the first elastic part 62 can be omitted, and a torsion spring can be provided at the rotatable connection between the wrench 61 and the outer shell 1.
[0047] Specifically, the outer shell 1 of the main body is also provided with a sliding groove arranged parallel to the push rod 2, and the end of the second elastic part 632 is slidably disposed in the sliding groove.
[0048] like Figure 2 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, a second limiting post 16 is provided inside the main body shell 1. The limiting post is used to form a blocking engagement with the wrench 61. The second limiting post 16 restricts the stroke of the wrench 61, preventing excessive displacement of the wrench 61, thereby achieving quantitative injection. Alternatively, as an alternative embodiment, the second limiting post 16 can be omitted, and a blocking block can be provided on the wrench 61, which forms a blocking engagement with the main body shell 1.
[0049] like Figure 2 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, a detachable sleeve 161 is provided on the second limiting post 16. By replacing the sleeve 161 of different sizes, the stroke of the wrench 61 can be changed, thereby achieving quantitative injection of different doses. Alternatively, as an alternative implementation, the sleeve 161 can be omitted, and only the second limiting post 16 is used to limit the stroke of the wrench 61.
[0050] like Figure 2 , Figure 7 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, the rack portion 631 has two guide plates spaced apart, and the push rod 2 is disposed between the two guide plates. The two guide plates can provide limiting guidance for the push rod 2, preventing the push rod 2 from deviating from the rack portion 631. Alternatively, as an alternative embodiment, the guide plates can also be disposed on the push rod 2, and the rack portion 631 can move between the two guide plates.
[0051] like Figure 1 , Figure 2 , Figure 9 , Figure 10 , Figure 11As shown, in the varicose vein closure surgical delivery device provided in this embodiment, a reset member 7 is rotatably provided on the main body shell 1. The reset member 7 includes: a connecting part 71, the first end of which is rotatably connected to the main body shell 1; and a pressing part 72, which is provided at the second end of the connecting part 71. The bottom of the pressing part 72 is provided with a pressing block 73 for contacting and engaging with the locking block 63. The main body shell 1 is provided with a through hole 17 for exposing the pressing part 72. When the pressing part 72 is pressed, the connecting part 71 rotates around the first end, causing the pressing block 73 on the pressing part 72 to contact the locking block 63, and pushing the rack portion 631 of the locking block 63 to disengage from the push rod 2, thereby allowing the push rod 2 to move backward until it is reset.
[0052] like Figure 2 , Figure 9 , Figure 11 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, a protective cap 8 is provided on the top of the pressing part 72, and a brim 81 extending in the radial direction is provided on the protective cap 8. The brim 81 forms a blocking fit with the periphery of the through hole 17. The brim 81 of the protective cap 8 can prevent foreign objects from entering through the through hole 17 on the outer shell 1 of the main body and affecting the function of the delivery device.
[0053] like Figure 1 , Figure 12 , Figure 13 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, the main body shell 1 includes a first body 11 and a second body 12, which are connected by a fastener. The first body 11 and the second body 12 are detachably connected by the fastener to form the main body shell 1.
[0054] like Figure 1 , Figure 14 , Figure 15 As shown, in the varicose vein closure surgical delivery device provided in this embodiment, the main body shell 1 is further provided with a first decorative member 13 and a second decorative member 14. The first decorative member 13 is snapped onto the bottom of the main body shell 1, and the second decorative member 14 is snapped onto the top of the main body shell 1. This improves the aesthetics of the delivery device. Specifically, the second decorative member 14 is provided with a through hole 17 for the protective cap 8 to extend. Alternatively, as an alternative embodiment, the first decorative member 13 and the second decorative member 14 can be omitted, and the first body 11 and the second body 12 constitute the main body shell 1.
[0055] How to use:
[0056] like Figure 1As shown, the varicose vein closure surgical delivery device provided in this embodiment, during use, connects the needle to the syringe, uses the combination of needle and syringe to draw adhesive from the vial into the syringe, and expels visible air from the syringe; replaces the needle on the syringe filled with adhesive with a 5 Fr (1.8 mm) injection tube, locks the tail of the syringe in the slot 18 of the main body shell 1, drives the push rod 2 along the positioning hole 41 and guide groove to push the piston rod of the syringe, so that the adhesive is pushed into the tip of the injection tube within 3 cm (range: 1 cm to 5 cm), and injects 0.10 ml (range: 0.06 ml to 0.12 ml) of adhesive completely into the vein by pulling the wrench 61 and holding it for 3 seconds, releases the wrench 61, and repeats the injection steps; after use, press the reset piece 7, pull back the push rod 2, and unlock and remove the syringe with the injection tube from the main body shell 1.
[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.
Claims
1. A varicose vein closure procedure delivery device, comprising: include: The main body shell (1) has an installation cavity inside, and the head opening of the installation cavity is provided with a slot (18) for installing a syringe. A push rod (2) is disposed at the tail of the mounting cavity, and the push rod (2) pushes the piston rod of the syringe through the drive assembly (6); The catheter (3) is set in the mounting cavity. A guide groove is provided in the catheter (3). The guide groove is used to limit the piston rod of the syringe. A positioning block (4) is provided at the rear end of the conduit (3). The positioning block (4) has a positioning hole (41). The push rod (2) passes through the positioning hole (41) and extends into the guide groove to contact the piston rod. A pressure block (5) is disposed at the rear end of the mounting cavity, and the pressure block (5) clamps the push rod (2).
2. The varicose vein closure procedure delivery device of claim 1, wherein, An installation plate is provided on the outside of the conduit (3), and the installation plate is fixedly connected to the outer shell (1) of the main body by a fastener.
3. The varicose vein closure procedure delivery device of claim 1, wherein, The driving component (6) includes: A wrench (61) is rotatably disposed inside the main body shell (1). The wrench (61) is provided with a first elastic part (62). The end of the first elastic part (62) contacts and engages with a first limiting post (15) on the main body shell (1) so that the first elastic part (62) has an elastic force to drive the wrench (61) to reset towards the outside of the main body shell (1). The driving end of the wrench (61) is provided with a cylindrical structure. A locking block (63) is provided on the wrench (61). The locking block (63) has a cylindrical space for cooperating with the cylindrical structure. The wrench (61) is hinged to the cylindrical space through the cylindrical structure. The locking block (63) has a rack portion (631) and a second elastic portion (632). The rack portion (631) is engaged with the serrated structure of the push rod (2). The second elastic portion (632) has an elastic force that drives the rack portion (631) to approach the push rod (2).
4. The varicose vein closure procedure delivery device of claim 3, wherein, The outer shell (1) of the main body is provided with a second limiting post (16), which is used to form a blocking engagement with the wrench (61).
5. The varicose vein closure procedure delivery device of claim 4, wherein, The second limiting post (16) is provided with a detachable sleeve post (161).
6. The varicose vein closure procedure delivery device of claim 3, wherein, The rack portion (631) has two guide plates spaced apart, and the push rod (2) is disposed between the two guide plates.
7. The varicose vein closure procedure delivery device of claim 3, wherein, A reset member (7) is rotatably provided on the outer shell (1) of the main body, the reset member (7) comprising: A connecting part (71) is provided, the first end of which is rotatably connected to the outer shell (1) of the main body; A pressing part (72) is provided at the second end of the connecting part (71). The bottom of the pressing part (72) is provided with a pressing block (73) for contacting and cooperating with the locking block (63). The outer shell (1) of the main body is provided with a through hole (17) for exposing the pressing part (72).
8. The varicose vein closure procedure delivery device of claim 7, wherein, The top of the pressing part (72) is provided with a protective cap (8), and the protective cap (8) is provided with a brim (81) extending in the radial direction. The brim (81) forms a blocking fit with the periphery of the through hole (17).
9. The varicose vein closure procedure delivery device of any one of claims 1-8, wherein, The outer shell (1) includes a first body (11) and a second body (12), which are connected by fasteners.
10. The varicose vein closure procedure delivery device of claim 9, wherein, The main body shell (1) is also provided with a first decorative piece (13) and a second decorative piece (14). The first decorative piece (13) is snapped onto the bottom of the main body shell (1), and the second decorative piece (14) is snapped onto the top of the main body shell (1).