A medical adhesive sealing system for varicose veins of the lower limbs

Abstract

This invention provides a medical adhesive closure system for varicose veins of the lower extremities, characterized by comprising an adhesive gun, a guidewire, a dilator, a guide sheath, a catheter, and a syringe. The adhesive gun consists of a handheld body and an adapter. The handheld body includes a spring-loaded trigger, a spike, a rack, a release button, a clamping block, and a locking block. Pressing the spring-loaded trigger allows for adhesive application, and the locking block holds the trigger in place to maintain pressure. During use, the guidewire is inserted into the body and passes through the lesion. The dilator is then inserted into the guide sheath and guided along the guidewire to the lesion. Once the guide sheath reaches the designated position, the dilator is removed and inserted into the catheter. The catheter is then connected to the adhesive gun for adhesive application. This invention utilizes adhesive treatment to close veins at room temperature, avoiding high temperatures and thermal damage. While addressing varicose vein complications, it improves the surgical experience and comfort, significantly increases treatment efficiency, and reduces medical costs.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically a medical adhesive sealing system for varicose veins of the lower extremities. Background Technology

[0002] Traditional treatments for varicose veins in the lower extremities include high ligation and stripping surgery. While these methods are thorough, they are invasive, leave numerous scars, and have a high recurrence rate, causing significant patient suffering. Another treatment, foam sclerotherapy, is less effective for large varicose veins, has a high recurrence rate, and often leads to thrombophlebitis. More recent treatments, such as endovenous laser therapy, radiofrequency ablation, and microwave therapy, require specialized equipment and anesthesia. Because they generate high temperatures, they often cause thermal damage to the skin and saphenous nerve, and are ineffective for treating thinner or clustered varicose veins. Summary of the Invention

[0003] The purpose of this invention is to propose a medical adhesive sealing system for varicose veins of the lower extremities, addressing the problems of insufficient precision, high recurrence rate, and limited applicability of existing varicose vein treatments. This invention applies medical bio-adhesive to the adhesive treatment of varicose veins of the lower extremities, achieving the effect of sealing varicose veins. Furthermore, the medical adhesive sealing of veins does not generate high temperatures, requires no anesthesia, and does not damage surrounding tissues, achieving the same therapeutic effect as endovenous laser therapy and radiofrequency ablation.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A medical adhesive closure system for varicose veins of the lower extremities, characterized in that it comprises an adhesive gun 001, a guide wire 002, a dilator 003, a guide sheath 004, a catheter 005, and a syringe 006. The adhesive gun 001 consists of a handheld body 2 and an adapter 1. The handheld body 2 includes a flexible trigger 11, a ratchet 13, a rack 14, a release button 15, a clamping block 16, and a locking block 17. When the flexible trigger 11 is pressed, the ratchet 13 moves forward, and the ratchet 13 moves the rack 14 forward by one tooth pitch, thereby delivering a measured amount of adhesive through the catheter into the vein to be closed. When the flexible trigger 11 is released, the ratchet 13 moves back, and because the rack 14 is clamped by the clamping block 16, its clamping force... The frictional force generated is greater than the frictional force between the teeth of the ratchet 13 and the rack 14, so the rack 14 remains stationary, while the ratchet 13 can be moved back one tooth pitch. At this time, pressing the elastic trigger 11 again can repeat the above movement and continuously push the rack 14 forward. In use, the guide wire 002 is inserted into the human body and passes through the lesion site. Then, the dilator 003 is inserted into the guide sheath 004 and enters the human body along the guide wire 002 and moves to the lesion. After the guide sheath 004 reaches the designated position, the dilator 003 is taken out and inserted into the catheter 005. The catheter 005 is connected to the output end of the syringe 006. Then, the syringe 006 and the glue gun 001 are connected to apply glue.

[0006] The handheld body 2 is L-shaped and hollow inside, allowing it to connect to the adapter 1. The handheld body 2 is divided into two parts: handheld body A21 and handheld body B22. Handheld body A21 and handheld body B22 are connected by five screws. The cavity of handheld body A21 has two support posts 211 on the side closest to the adapter 1, one support post 211 at a corner away from the adapter 1, and one support post 211 in the middle of the corner. The section of handheld body A21 perpendicular to the adapter 1 forms the handle 212. The bottom center of the handle 212 also has a support post 211, and the support post 211 has a threaded hole 2111. The handheld body B22 is also provided with B support 221 at the position corresponding to each of the support columns 211. The B support 221 has a B thread hole 2211 of the same specification as the thread hole 2111. The outer side of the handheld body B22 at the position of each B support 221 is provided with a countersunk hole 222. After the B support 221 and the support column 211 are aligned and fastened, the fixing screw 23 is screwed into the countersunk hole 222 to connect and fix the B support 221 and the support column 211, thereby fixing the handheld body A21 and the handheld body B22. The existence of the countersunk hole 222 allows the fixing screw 23 to sink into the inner surface of the outer surface of the handheld body B22. The handheld body A21 is also provided with a trigger connecting shaft 25.

[0007] The elastic trigger 11 has a pivot hole 111, through which the elastic trigger 11 and the trigger connecting shaft 25 can be hinged together. The elastic trigger 11 is fan-shaped with raised edges and a recessed center, and has a fan-shaped hollow in the middle. A long strip of elastic sheet 112 with a certain curvature is provided on the side of the elastic trigger 11 near the hand-held body 2. When in use, the elastic sheet 112 will be bent to the side of the support column 211 located at the bottom center of the handle 212 of the hand-held body A near the elastic trigger 11. An arc-shaped trigger limiting strip 113 is provided on the direction of the elastic trigger 11 near the locking block 17. The trigger limiting strip 113 has a small limiting strip groove 1131 on the side near the hand-held body A21. A cylindrical hinge shaft 114 is provided on the top of the elastic trigger 11, through which it can be hinged together with the ratchet 13.

[0008] The locking block 17 is an elliptical cylindrical strip with a spring 18 for use. A spring baffle 171 is located in the middle of the locking block 17. The spring baffle 171 has a circular groove with a diameter slightly larger than the spring 18 on the side facing the handheld body A21, which can hold the spring 18 in place. A limiting protrusion 172 is located near the end of the locking block 17 close to the handheld body A21. The limiting protrusion 172 is L-shaped and can fit against the trigger limiting strip 113. Both sides of the locking block 17 penetrate the handheld body 2. A locking block fixing hole 173 is respectively opened on the main body A21 and the hand-held main body B22. The locking block 17 can be installed between the two locking block fixing holes 173 and slide. The position of the locking block 17 can be adjusted by pressing the locking block 173 at the locking block fixing hole 173. One side of the spring 18 is fixed on the spring baffle 171, and the other side is in contact with the inner surface of the hand-held main body A21. A spring fixing protrusion 181 is provided at the junction of the spring 18 and the hand-held main body A21, which can fix the spring 18 on the spring fixing protrusion 181.

[0009] A rectangular locking block switch hole 1741 is provided next to the locking block 17 on the handheld body A21. A locking block switch 174 that slides back and forth can be fixed in the locking block switch hole 1741. The locking block switch 174 consists of a toggle part 1742 that is low on both sides and high in the middle, and an L-shaped fixing part 1743. The L-shaped protrusion of the fixing part 1743 points towards the limiting protrusion 172 and can be inserted into the limiting protrusion 172 to lock it in place. Two switch latches 1744 are provided on the upper and lower sides of the connection between the toggle part 1742 and the fixing part 1743. The top of the switch latches 1744 has a facing direction towards the fixing part 1742. The switch buckle 1744 has a certain elasticity, and the locking block switch 174 can be fixed to the locking block switch hole 1741 through the buckle protrusion 1745. The two switch buckles 1744 are respectively provided with buckle limiting posts 1746 on their surfaces. The locking block switch hole 1741 is also provided with two pairs of buckle limiting grooves 1747. The buckle limiting grooves 1747 can lock the buckle limiting posts 1746. The two buckle limiting grooves 1747 respectively allow the fixing part 1743 to be inserted into the limiting protrusion 172 and allow the fixing part 1743 to be moved away from the limiting protrusion 172.

[0010] A rack guide groove 24 is provided within the handheld body 2, collinear with the axis of the adapter 1. When the handheld body 2 is engaged, the rack guide groove 24 has a convex cross-section, allowing the rack 14 to be inserted and slide within it. The rack 14 is flat and elongated, with one end near the adapter 1 being cylindrical. Serrations are distributed on the surface facing the elastic trigger 11, and a rack limiting plate 141 perpendicular to the main body is provided on the opposite side. A clamping block base 161 is located on the top of the rack guide groove 24, on one side of the handheld body A21. The clamping block base 161 is a rectangular deep hole, and the main body of the clamping block 16 is rectangular, facilitating installation. The device has clamping block pressure plates 162 on both sides for clamping. The clamping block pressure plates 162 have a certain elasticity. Each clamping block pressure plate 162 is similar to the shape of a "7". The corner can directly contact and press the rack limiting plate 141. The handheld body B22 is provided with a clamping block push plate 163 at the position corresponding to the clamping block base 161. Under the joint action of the clamping block push plate 163 and the clamping block base 161, it can be ensured that after the handheld body A21 and the handheld body B22 are fastened, the clamping block 16 can press the rack limiting plate 141 on the rack 14 tightly, so that a certain friction force is generated on the contact surface of the clamping block pressure plate 162 and the rack limiting plate 141, preventing them from sliding easily.

[0011] A hinge bearing seat 131 is provided on the lower surface of the ratchet 13. With the cooperation of the hinge bearing seat 131 and the hinge shaft 114, the ratchet 13 and the elastic trigger 11 can be hinged together. The end of the ratchet 13 near the adapter 1 is a flat cuboid with a serrated protrusion at the top, which can engage with the serrations on the rack 14 to hold the rack 14 in place. Trapezoidal ratchet baffles 132 are provided on both sides of the protrusion. A V-shaped ratchet reset plate 133 is connected to the end of the ratchet 13 away from the adapter 1. The ratchet 13 and the ratchet reset plate 133 have a certain degree of elasticity. In use, the end of the ratchet reset plate 133 away from the ratchet 13 is in close contact with the lower surface of the rack guide groove 24. A release button 15 is provided at the top of the ratchet 13. The release button 15 has a flat rectangular bottom, with its bottom surface contacting the upper surface of the ratchet baffle 132, and a square groove in the middle allowing the rack limiting plate 141 to pass through. The top is cylindrical and extends beyond the handheld body 2. The handheld body 2 has a release button hole 151 allowing the release button 15 to pass through. A long, narrow button connecting rod 152 is located on the side of the release button 15 away from the adapter 1. A button pivot 153 is located at the end of the button connecting rod 152. The button pivot 153 is cylindrical. A button pivot bearing seat 154 is located on the handheld body 2 at the position of the button pivot 153. The release button 15 is hinged to the handheld body 2 through the cooperation of the button pivot 153 and the button pivot bearing seat 154.

[0012] A connecting shaft 101 is provided at the connection between the adapter 1 and the handheld body 2. Two adapter holders 102 are provided on the connecting shaft 101, spaced 180° apart. One end of each adapter holder 102 has a protrusion. A rack guide post 103 extends from the connecting shaft 101 toward the adapter 1. The rack guide post 103 is hollow, with an inner diameter slightly larger than the outer diameter of the cylindrical end of the rack 14, and its length extends to the end of the adapter 1 furthest from the handheld body 2. The adapter 1 has a frustum-shaped shell, with a larger diameter and a fully open state on the side closer to the handheld body 2. An L-shaped adapter is provided at the position corresponding to the adapter holder 102. The adapter groove 105 has a small recess at its end. When the adapter 1 and the handheld body 2 are connected, the adapter holder 102 can be inserted into the adapter groove 105. Then, the adapter 1 is rotated 90 degrees so that the protrusion on the adapter holder 102 is inserted into the recess in the adapter groove 105, thus fixing the adapter 1 and the handheld body 2. The end of the adapter 1 away from the handheld body 2 has an elliptical adapter opening 106. The inner side of the arc-shaped edge of the adapter opening 106 has a row of opening serrations 107. The upper and lower sides of the inner side of the adapter opening 106 in a direction perpendicular to the adapter opening 106 have a syringe limiting protrusion 108.

[0013] One end of the dilator tube 003 is provided with a dilator tube connector 0031; one end of the guide sheath tube 004 is provided with a guide sheath tube connector 0041, and the guide sheath tube 004 is provided with laser graduation marks; one end of the catheter 005 is provided with a catheter connector 0051; both the dilator tube 003 and the catheter 005 can be inserted into the guide sheath tube 004; the dilator tube 003 can be fitted onto the guide wire 002 and extend forward along the guide wire 002; the dilator tube connector 0031 and the guide sheath connector 004... The expansion tube connector 0031 and the guide sheath connector 0041 can be connected using a Luer connector. A retaining ring 007 can lock the expansion tube connector 0031 and the guide sheath connector 0041 or the catheter connector 0051 and the guide sheath connector 0041 together. The retaining ring 007 has a threaded inner ring, which can engage with the threads on the expansion tube connector 0031, the guide sheath connector 0041 and the catheter connector 0051 to lock them in place.

[0014] The expansion tube 003, the guide sheath 004, and the catheter 005 are all flexible tubes that can be bent.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In this invention, after the catheter enters the varicose vein, it can be precisely positioned under ultrasound guidance. A quantitative and uniform amount of adhesive is injected into the vein lumen, facilitating pressure on the proximal segment of the catheter. This helps prevent ectopic embolism of the adhesive and promotes adhesion of the vessel wall. This method does not generate high temperatures, requires no anesthesia, and does not damage surrounding tissues. It achieves the same therapeutic effect as endovascular laser therapy and radiofrequency ablation, and is widely applicable and less prone to recurrence.

[0017] The glue gun used in this invention can lock the trigger using the locking block. The lockable trigger can be mechanically pressure-maintained, replacing the doctor's manual pressing of the trigger for a long time, reducing the doctor's burden, and meeting the requirements of high pressure inside the cannula when the glue viscosity is high and each injection requires a long pressure maintenance time. Attached Figure Description

[0018] Figure 1 This is one of the schematic diagrams of the overall structure of the glue gun of the present invention;

[0019] Figure 2 This is one of the schematic diagrams of the internal structure of the glue gun of the present invention;

[0020] Figure 3 This is the second schematic diagram of the internal structure of the glue gun of the present invention;

[0021] Figure 4 This is one of the partial structural diagrams of the elastic trigger and locking block of the glue gun of the present invention;

[0022] Figure 5 This is the second partial structural diagram of the elastic trigger and locking block of the glue gun of the present invention;

[0023] Figure 6 This is a partial structural diagram of the locking block of the glue gun in this invention;

[0024] Figure 7 This is the second schematic diagram of the overall structure of the glue gun of the present invention.

[0025] Figure 8 This is a partial structural diagram of the dispensing gun's spikes and clamping block of the present invention;

[0026] Figure 9 An exploded view showing the positional relationship between the dispensing gun's ratchet, rack, and release button of this invention;

[0027] Figure 10 This is one of the structural schematic diagrams of the glue gun adapter of the present invention;

[0028] Figure 11 This is the second schematic diagram of the dispensing gun adapter structure of the present invention;

[0029] Figure 12This is the third schematic diagram of the dispensing gun adapter structure of the present invention;

[0030] Figure 13 This is a schematic diagram of the handheld body A of the glue gun of the present invention;

[0031] Figure 14 This is a schematic diagram of the handheld body B of the glue gun of the present invention;

[0032] Figure 15 This is a partial structural diagram of the glue gun elastic trigger of the present invention being jammed by the locking block;

[0033] Figure 16 This is a partial structural diagram of the dispensing gun handheld body A of the present invention;

[0034] Figure 17 This is a schematic diagram of the structure of all products of this invention;

[0035] Figure 18 This is a schematic diagram of the structure of the guidewire, dilation tube, and guide sheath used in conjunction with the present invention;

[0036] Figure 19 This is a schematic diagram of the structure of the catheter of the present invention when it is connected to a dispensing gun via a syringe and installed into a guide sheath.

[0037] In the diagram: 001 - Dispensing gun; 002 - Guide wire; 003 - Expander tube; 0031 - Expander tube connector; 004 - Guide sheath; 0041 - Guide sheath connector; 005 - Catheter; 0051 - Catheter connector; 006 - Syringe; 007 - Snap ring; 1. Adapter; 101 - Connecting shaft; 102 - Adapter holder; 103 - Rack guide post; 105 - Adapter groove; 106 - Adapter opening; 107 - Opening 108. Sawtooth notch; 11. Syringe limiting protrusion; 11. Elastic trigger; 111. Rotary shaft hole; 112. Elastic plate; 113. Trigger limiting strip; 1131. Limiting strip groove; 114. Hinge shaft; 13. Ratchet; 131. Hinge bearing seat; 132. Ratchet baffle; 133. Ratchet reset plate; 14. Rack; 141. Rack limiting plate; 15. Release button; 151. Release button hole; 152. Button connecting rod; 15 3. Button pivot; 154. Button pivot bearing seat; 16. Clamping block; 161. Clamping block base; 162. Clamping block pressure plate; 163. Clamping block push plate; 17. Locking block; 171. Spring baffle; 172. Limiting protrusion; 173. Locking block fixing hole; 174. Locking block switch; 1741. Locking block switch hole; 1742. Toggle part; 1743. Fixing part; 1744. Switch buckle; 1745. Buckle 1746, Protrusion; 1747, Snap-in Limiting Post; 18, Snap-in Limiting Groove; 18, Spring; 181, Spring Fixing Protrusion; 2, Handheld Body; 21, Handheld Body A; 211, Support Post; 212, Handheld Body A Handle; 2111, Threaded Hole; 22, Handheld Body B; 221, B Support Post; 2211, B Threaded Hole; 222, Countersunk Hole; 23, Fixing Screw; 24, Rack Guide Groove; 25, Trigger Connecting Shaft. Detailed Implementation

[0038] To clarify the technical problems, technical solutions, implementation processes, and performance demonstrations, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative. The present invention is not intended to limit the scope of the invention. Various exemplary embodiments, features, and aspects of this disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0039] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0040] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0041] Example 1

[0042] Please see Figure 1-16 This invention provides a medical adhesive closure system for varicose veins of the lower extremities, characterized by comprising a dispensing gun 001, a guide wire 002, a dilator 003, a guide sheath 004, a catheter 005, and a syringe 006. The dispensing gun 001 consists of a handheld body 2 and an adapter 1. The handheld body 2 includes a flexible trigger 11, a ratchet 13, a rack 14, a release button 15, a clamping block 16, and a locking block 17. When the flexible trigger 11 is pressed, the ratchet 13 moves forward, causing the rack 14 to move forward one tooth pitch, thereby dispensing a measured amount of adhesive through the catheter into the vein to be closed. When the flexible trigger 11 is released, the ratchet 13 moves back, and the rack 14 is clamped by the clamping block 16. The frictional force generated by its clamping force is greater than the frictional force between the teeth of the ratchet 13 and the rack 14, so the rack 14 remains stationary, while the ratchet 13 can be moved back one tooth pitch. At this time, pressing the elastic trigger 11 again can repeat the above movement and continuously push the rack 14 forward. In use, the guide wire 002 is implanted into the human body and passes through the lesion site. Then, the dilator 003 is inserted into the guide sheath 004 and enters the human body along the guide wire 002 and moves to the lesion. After the guide sheath 004 reaches the designated position, the dilator 003 is taken out and inserted into the catheter 005. The catheter 005 is connected to the output end of the syringe 006. Then, the syringe 006 and the glue gun 001 are connected to apply glue.

[0043] like Figure 2 , Figure 3 , Figure 13 and Figure 14As shown, in one possible implementation, the handheld body 2 is L-shaped and hollow inside, allowing it to connect to the adapter 1. The handheld body 2 is divided into two parts: a handheld body A21 and a handheld body B22. The handheld body A21 and handheld body B22 are connected by five screws. The cavity of the handheld body A21 has two support posts 211 on the side closest to the adapter 1, one support post 211 at a corner away from the adapter 1, and one support post 211 in the middle of the corner. The section of the handheld body A21 perpendicular to the adapter 1 is the handle 212. The bottom center of the handle 212 also has a support post 211, and the support post 211 has a threaded hole 2111. The handheld body B22 also has a support post B at a position corresponding to each support post 211. The support 221 has a B-threaded hole 2211 of the same specification as the threaded hole 2111. Each B-support 221 has a countersunk hole 222 on the outer side of the handheld body B22. After aligning and fastening the B-support 221 and the support column 211, a fixing screw 23 is screwed into the countersunk hole 222 to connect and fix the B-support 221 and the support column 211, thus fixing the handheld body A21 and the handheld body B22. The countersunk hole 222 allows the fixing screw 23 to sink into the inner surface of the handheld body B22. The fixing screw 23 threads the B-support 221 and the support column 211, thus fixing the handheld body A21 and the handheld body B22, forming a closed handheld body 2. A trigger connecting shaft 25 is also provided on the handheld body A21.

[0044] like Figure 4 As shown, in one possible implementation, the elastic trigger 11 is provided with a pivot hole 111. The elastic trigger 11 and the trigger connecting shaft 25 can be hinged together via the pivot hole 111 and the handheld body 2. The elastic trigger 11 body is fan-shaped with protruding edges and a concave center, and has a fan-shaped hollow center. A long, curved elastic piece 112 is provided on the side of the elastic trigger 11 near the handheld body 2. During use, the elastic piece 112 is bent towards the support post 211 located at the bottom center of the handle 212 of the handheld body A, near the side of the elastic trigger 11. Figure 3At the indicated position, due to the elasticity of the elastic plate 112, the elastic trigger 11 will reset under the action of the elastic plate 112 after being pressed; the elastic trigger 11 is provided with an arc-shaped trigger limiting strip 113 in the direction near the locking block 17, and the trigger limiting strip 113 is provided with a small limiting strip groove 1131 on the side near the handheld body A21; the top of the elastic trigger 11 is provided with a cylindrical hinge shaft 114, which can be hinged to the ratchet 13; When the elastic trigger 11 is pressed, it will rotate a certain angle around the pivot hole 111. At this time, the cylindrical hinge shaft 114 located above the pivot hole 111 will drive the ratchet 13 to move forward by one tooth pitch. When the elastic trigger 11 is released, the ratchet 13 moves back. Since the rack 14 is clamped by the clamping block 16, the frictional force generated by its clamping force is greater than the frictional force between the ratchet 13 and the rack 14 teeth. Therefore, the rack 14 remains stationary, while the ratchet 13 can move back by one tooth pitch.

[0045] The locking block 17 is an elliptical cylindrical strip with a spring 18 for use. A spring baffle 171 is located in the middle of the locking block 17. The spring baffle 171 has a circular groove with a diameter slightly larger than the spring 18 on the side facing the handheld body A21, which can hold the spring 18 in place. A limiting protrusion 172 is located near the end of the locking block 17 close to the handheld body A21. The limiting protrusion 172 is L-shaped and can fit against the trigger limiting strip 113. Both sides of the locking block 17 penetrate the handheld body 2, and the handheld body A21 and the handheld body... A locking block fixing hole 173 is respectively opened on the body B22. The locking block 17 can be installed between the two locking block fixing holes 173 and slide. The position of the locking block 17 can be adjusted by pressing the locking block 17 at the locking block fixing hole 173. One side of the spring 18 is fixed to the spring baffle 171, and the other side contacts the inner surface of the handheld body A21. A spring fixing protrusion 181 is provided at the junction of the spring 18 and the handheld body A21, which can fix the spring 18 to the spring fixing protrusion 181. When the spring 18 is at its original length, the locking block 17 will be pushed to the side as shown in the figure. Figure 15 At this position, if the elastic trigger 11 is pressed to rotate it to the position shown... Figure 15 At the position shown, the limiting protrusion 172 of the locking block 17 will engage with the limiting strip groove 1131. At this time, the elastic trigger 11 cannot rebound and will temporarily maintain this angle. If you want the elastic trigger 11 to rebound, you need to press the locking block 17 through the locking block fixing hole 173 to compress the spring 18. When the locking block 17 moves to the position shown, the spring 18 will be compressed. Figure 6At the indicated position, the limiting protrusion 172 can be pulled out from the limiting strip groove 1131, allowing the elastic trigger 11 to continue to rebound normally.

[0046] A rectangular locking block switch hole 1741 is provided next to the locking block 17 on the handheld body A21. A locking block switch 174 that slides back and forth can be fixed in the locking block switch hole 1741. The locking block switch 174 consists of a toggle part 1742 that is low on both sides and high in the middle and an L-shaped fixing part 1743. The L-shaped protrusion of the fixing part 1743 points towards the limiting protrusion 172 and can be inserted into the limiting protrusion 172 to lock it in place. Two switch latches 1744 are provided on the upper and lower sides of the connection between the toggle part 1742 and the fixing part 1743. The top of the switch latches 1744 has a latch protrusion 1745 facing the opposite side to the fixing part 1743. The main body of the switch latches 1744 has a certain degree of elasticity. The protrusion 1745 can fix the locking block switch 174 to the locking block switch hole 1741 and prevent it from falling off; the two switch buckles 1744 are respectively provided with buckle limiting posts 1746 on their surfaces, and the locking block switch hole 1741 is also provided with two pairs of buckle limiting grooves 1747. The buckle limiting grooves 1747 can lock the buckle limiting posts 1746. The two buckle limiting grooves 1747 respectively allow the fixing part 1743 to be inserted into the limiting protrusion 172 and allow the fixing part 1743 to be moved away from the limiting protrusion 172; when the locking block 17 moves towards the adapter 1, the buckle limiting post 1746 will be locked into the buckle limiting groove 1747 on the side closer to the adapter 1, at which time the locking block 17 is fixed in place. Figure 4 At the indicated position, the fixing part 1743 is inserted into the limiting protrusion 172, and the locking block 17 will be fixed, unable to hold the elastic trigger 11 under the action of the spring 18; when the locking block 17 moves away from the adapter 1, the latching limiting post 1746 will engage with the latching limiting groove 1747 on the side away from the adapter 1, at which time the locking block 17 is fixed as shown. Figure 5 At the position shown, the fixing part 1743 is pulled out from the limiting protrusion 172, losing its fixing effect on the locking block 17. At this time, when the elastic trigger 11 moves to the position shown... Figure 15 When in the indicated position, the locking block 17 will engage with the limiting strip groove 1131 under the elastic force of the spring 18, locking the elastic trigger 11 to prevent it from rebounding. This mechanical pressure maintenance replaces the doctor's manual long-term pressing of the trigger, reducing the doctor's burden and meeting the requirements of high pressure inside the catheter when the glue viscosity is high and each injection requires a long pressure maintenance time.

[0047] A rack guide groove 24 is provided within the handheld body 2, collinear with the axis of the adapter 1. When the handheld body 2 is engaged, the rack guide groove 24 has a convex cross-section, allowing the rack 14 to be inserted and slide within it. The rack 14 is flat and elongated, with one end near the adapter 1 being cylindrical. Serrations are distributed on the surface facing the elastic trigger 11, and a rack limiting plate 141 perpendicular to the main body is provided on the opposite side. A clamping block base 161 is located on the top of the rack guide groove 24, on one side of the handheld body A21. The clamping block base 161 is a rectangular deep hole, and the main body of the clamping block 16 is rectangular, facilitating installation. The device has clamping block pressure plates 162 on both sides for clamping. The clamping block pressure plates 162 have a certain elasticity. Each clamping block pressure plate 162 is similar to the shape of a "7". The corner can directly contact and press the rack limiting plate 141. The handheld body B22 is provided with a clamping block push plate 163 at the position corresponding to the clamping block base 161. Under the joint action of the clamping block push plate 163 and the clamping block base 161, it can be ensured that after the handheld body A21 and the handheld body B22 are fastened, the clamping block 16 can press the rack limiting plate 141 on the rack 14 tightly, so that a certain friction force is generated on the contact surface of the clamping block pressure plate 162 and the rack limiting plate 141, preventing them from sliding easily.

[0048] like Figure 8 and Figure 9As shown, a hinge bearing seat 131 is provided on the lower surface of the ratchet 13. With the cooperation of the hinge bearing seat 131 and the hinge shaft 114, the ratchet 13 and the elastic trigger 11 can be hinged together. The end of the ratchet 13 near the adapter 1 is a flat cuboid with a serrated protrusion at the top, which can engage with the serrations on the rack 14 to hold the rack 14 in place. Trapezoidal ratchet baffles 132 are provided on both sides of the protrusion. A V-shaped ratchet reset plate 133 is connected to the end of the ratchet 13 away from the adapter 1. The ratchet 13 and the ratchet reset plate 133 have a... The ratchet reset plate 133, when in use, has its end away from the ratchet 13 in close contact with the lower surface of the rack guide groove 24; a release button 15 is provided on the top of the ratchet 13, the bottom of the release button 15 is flat and rectangular, the bottom surface of which contacts the upper surface of the ratchet baffle 132, and a square groove in the middle is provided to allow the rack limiting plate 141 to pass through; the top is cylindrical and extends out of the handheld body 2, the handheld body 2 is provided with a release button hole 151 that allows the release button 15 to pass through, and a long strip button connecting rod is provided on the side of the release button 15 away from the adapter 1. 152, the end of the button connecting rod 152 is provided with a button pivot 153, the button pivot 153 is cylindrical, and the handheld body 2 is provided with a button pivot bearing seat 154 at the position of the button pivot 153; the release button 15 is hinged to the handheld body 2 through the cooperation of the button pivot 153 and the button pivot bearing seat 154; the serrations on the ratchet 13 and the serrations on the rack 14 cooperate to lock the rack 14, and when it is necessary to manually adjust the position of the rack 14, the release button 15 can be pressed to move downwards, and the release button 15 will press down. The ratchet baffle 132 presses the ratchet 13 downward, thereby separating the serrations on the ratchet 13 from the serrations on the rack 14. This allows manual adjustment of the rack 14's position. After adjustment, releasing the release button 15 causes the ratchet reset plate 133 on the ratchet 13 to undergo elastic deformation after the ratchet 13 moves downward. Releasing the release button 15 causes the ratchet reset plate 133 to reset the ratchet 13, allowing the serrations on the ratchet 13 to engage with the serrations on the rack 14, enabling normal operation to continue.

[0049] like Figures 10-12As shown, a connecting shaft 101 is provided at the connection between the adapter 1 and the handheld body 2. Two adapter holders 102 are provided on the connecting shaft 101, spaced 180° apart. One end of each adapter holder 102 has a protrusion. A rack guide post 103 extends from the connecting shaft 101 toward the adapter 1. The rack guide post 103 is hollow, with an inner diameter slightly larger than the outer diameter of the cylinder at the end of the rack 14, and its length extends to the adapter 1 away from the... One end of the handheld body 2; the adapter 1 is a frustum-shaped shell, with a larger diameter and a completely open state on the side closer to the handheld body 2. An L-shaped adapter groove 105 is provided at the position corresponding to the adapter holder 102. A small recess is also provided at the end of the adapter groove 105. When the adapter 1 and the handheld body 2 are connected, the adapter holder 102 can be inserted into the adapter groove 105. Then, the adapter 1 is rotated 90 degrees so that the protrusion on the adapter holder 102 engages with the recess in the adapter groove 105, thus fixing the adapter 1 and the handheld body 2. The end of the adapter 1 away from the handheld body 2 has a roughly elliptical adapter opening 106. A row of serrated edges 107 is provided on the inner side of the arc-shaped edge of the adapter opening 106. A syringe limiting protrusion 108 is provided on the upper and lower sides of the inner side of the adapter opening 106 in a direction perpendicular to the adapter opening 106. The adapter opening 106 allows the rolled edge of the syringe 006 to be inserted into the adapter, and then the syringe 006 can be inserted into the adapter. 06. Rotate 90° until the syringe limiting protrusion 108 is exposed, and then put the adapter 1 onto the handheld body 2. The rack guide post 103 can hold the syringe in place. Under the combined action of the guide post 103 and the open serration 107, the syringe is fixed by friction. The plunger on the syringe can be directly put into the rack guide post 103 and held in place by the cylinder at the end of the rack 14. When the rack 14 moves forward under the drive of the ratchet 13, it can push the plunger of the syringe to achieve glue application.

[0050] like Figures 17-19The dilator 003 has a dilator connector 0031 at one end; the guide sheath 004 has a guide sheath connector 0041 at one end, and the guide sheath 004 has laser graduation marks on its tubing; the catheter 005 has a catheter connector 0051 at one end; both the dilator 003 and the catheter 005 can be inserted into the guide sheath 004; the dilator 003 can be fitted onto the guidewire 002 and extend forward along the guidewire 002; the dilator connector 0031 and the guide sheath connector 0041 can be connected using a Luer connector, and the catheter connector 0051 and the guide sheath connector 0041 can be connected using a Luer connector, secured by a retaining ring 007. The expansion tube connector 0031 and the guide sheath connector 0041, or the catheter connector 0051 and the guide sheath connector 0041, are mutually locked together. The inner ring of the retaining ring 007 is threaded, which can engage with the threads on the expansion tube connector 0031, the guide sheath connector 0041, and the catheter connector 0051 to lock them together. After mutual locking, the catheter connector 0051 and the guide sheath connector 0041 can fix the relative position between the guide sheath 004 and the catheter 005. Moving the guide sheath 004 can move the catheter 005 synchronously. By observing the movement of the laser scale value on the guide sheath 004, the distance moved by the catheter 005 can be known, and thus the spacing of each glue application can be determined.

[0051] The expansion tube 003, the guide sheath 004, and the catheter 005 are all flexible tubes that can be bent.

[0052] In practical use, the glue gun 001 is used to push the plunger inside the syringe 006 to move. The syringe 006 is fixedly installed on the adapter at the nozzle end of the glue gun 001. The catheter 005 is installed at the outlet end of the syringe 006 via a Luer connector. The guide sheath 004, the dilator 003, and the guide wire 002 are used to insert the catheter 005 into the varicose vein. By pushing the rack with the glue gun 001, the plunger of the syringe 006 is squeezed, and the glue stored inside is injected into the varicose vein for closure.

[0053] In this invention, after the catheter enters the varicose vein, it can be precisely positioned under ultrasound guidance, and glue can be injected quantitatively and evenly into the venous lumen. This facilitates pressing the vein proximal to the catheter, which helps to prevent ectopic embolism of the adhesive and promotes adhesion of the blood vessel wall.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A medical adhesive sealing system for varicose veins of the lower extremities, characterized in that, The device comprises a glue gun (001), a guide wire (002), a dilator (003), a guide sheath (004), a catheter (005), and a syringe (006). The glue gun (001) consists of a handheld body (2) and an adapter (1). The handheld body (2) contains a spring trigger (11), a ratchet (13), a rack (14), a release button (15), a clamping block (16), and a locking block (17). When the spring trigger (11) is pressed, the ratchet (13) moves forward, and the ratchet (13) moves the rack (14) forward by one tooth pitch, thereby delivering a measured amount of glue through the catheter into the vein to be closed. When the spring trigger (11) is released, the ratchet (13) moves back. Since the rack (14) is clamped by the clamping block (16), the clamping force generates friction. The friction force is greater than the friction force between the serrated edge (13) and the teeth of the rack (14), so the rack (14) remains stationary, while the serrated edge (13) can be moved back one tooth pitch; at this time, the elastic trigger (11) is pressed again, and the above movement can be repeated to continuously push the rack (14) forward; when in use, the guide wire (002) is implanted into the human body and passes through the lesion site, and then the dilator (003) is inserted into the guide sheath (004) and enters the human body along the guide wire (002) and moves to the lesion site. After the guide sheath (004) reaches the designated position, the dilator (003) is taken out and inserted into the catheter (005). The catheter (005) is connected to the output end of the syringe (006), and then the syringe (006) is connected to the glue gun (001) for glue application; The handheld body (2) is divided into two parts in the middle, namely handheld body A (21) and handheld body B (22); The elastic trigger (11) is provided with an arc-shaped trigger limit strip (113) in the direction close to the locking block (17), and the trigger limit strip (113) is provided with a small limit strip groove (1131) on the side close to the hand-held body A (21). The locking block (17) is an elliptical cylindrical strip with a spring (18) for use with it. The locking block (17) has a spring baffle (171) in the middle. The spring baffle (171) has a circular groove with a diameter slightly larger than the spring (18) on the side facing the handheld body A (21), which can lock the spring (18). One side of the spring (18) is fixed to the spring baffle (171), and the other side is in contact with the inner surface of the handheld body A (21). A spring fixing protrusion (181) is provided at the junction of the spring (18) and the handheld body A (21), so that the spring (18) can be fixed on the spring fixing protrusion (181). The locking block (17) will be engaged in the groove (1131) of the limiting strip under the elastic force of the spring (18) to lock the elastic trigger (11) and prevent it from rebounding, thus mechanically maintaining pressure.

2. The medical adhesive sealing system for varicose veins of the lower extremities according to claim 1, characterized in that, The handheld body (2) is L-shaped and hollow inside, and can be connected to the adapter (1). The handheld body A (21) and the handheld body B (22) are connected by five screws. The cavity of the handheld body A (21) has two support pillars (211) on the side closest to the adapter (1), one support pillar (211) on the corner away from the adapter (1), and one support pillar (211) in the middle of the corner. The section of the handheld body A (21) perpendicular to the adapter (1) is the handle (212). The bottom of the handle (212) of the handheld body A also has a support pillar (211) in the middle. The support pillar (211) has a threaded hole (2111). The handheld body B (22) is connected to each of the support pillars (211). A B support (221) is also provided at the corresponding position. The B support (221) has a B thread hole (2211) of the same specification as the thread hole (2111). The outer side of the handheld body B (22) at the position of each B support (221) has a countersunk hole (222). After the B support (221) and the support column (211) are aligned and fastened, the fixing screw (23) is screwed into the countersunk hole (222) and the B support (221) and the support column (211) are connected and fixed. The handheld body A (21) and the handheld body B (22) can be fixed. The existence of the countersunk hole (222) allows the fixing screw (23) to sink into the inner surface of the outer surface of the handheld body B (22). The handheld body A (21) is also provided with a trigger connecting shaft (25).

3. The medical adhesive sealing system for varicose veins of the lower extremities according to claim 2, characterized in that, The elastic trigger (11) is provided with a pivot hole (111). The elastic trigger (11) and the handheld body (2) can be hinged together through the pivot hole (111) and the trigger connecting shaft (25). The body of the elastic trigger (11) is fan-shaped with raised edges and a recessed center, and a fan-shaped hollow in the middle. A long strip elastic piece (112) with a certain curvature is provided on the side of the elastic trigger (11) near the handheld body (2). When in use, the elastic piece (112) will be bent to the side of the support column (211) located in the middle of the bottom of the handle (212) of the handheld body A near the elastic trigger (11). A cylindrical hinge shaft (114) is provided at the top of the elastic trigger (11). The hinge shaft (114) can be hinged to the ratchet (13).

4. The medical adhesive sealing system for varicose veins of the lower extremities according to claim 3, characterized in that, The locking block (17) has a limiting protrusion (172) near one end of the handheld body A (21). The limiting protrusion (172) is L-shaped and can fit with the trigger limiting strip (113). The two sides of the locking block (17) will penetrate the handheld body (2). The handheld body A (21) and the handheld body B (22) are respectively provided with a locking block fixing hole (173). The locking block (17) can be installed between the two locking block fixing holes (173) and slide. The position of the locking block (17) can be adjusted by pressing the locking block (17) at the locking block fixing hole (173).

5. A medical adhesive sealing system for varicose veins of the lower extremities according to claim 4, characterized in that, A rectangular locking block switch hole (1741) is provided on the handheld body A (21) next to the locking block (17). A locking block switch (174) that slides back and forth can be fixed in the locking block switch hole (1741). The locking block switch (174) consists of a toggle part (1742) that is low on both sides and high in the middle and an L-shaped fixing part (1743). The L-shaped protrusion of the fixing part (1743) points to the limiting protrusion (172) and can be inserted into the limiting protrusion (172) to lock it. Two switch buckles (1744) are provided on the upper and lower sides of the connection between the toggle part (1742) and the fixing part (1743). The top of the switch buckle (1744) is provided facing the fixing part (1743). 43) The buckle protrusion (1745) on the opposite side, the main body of the switch buckle (1744) has a certain elasticity, and the locking block switch (1744) can be fixed to the locking block switch hole (1741) through the buckle protrusion (1745); the two switch buckles (1744) are respectively provided with buckle limiting posts (1746), and the locking block switch hole (1741) is also provided with two pairs of buckle limiting grooves (1747). The buckle limiting grooves (1747) can lock the buckle limiting posts (1746). The two buckle limiting grooves (1747) respectively allow the fixing part (1743) to insert into the limiting protrusion (172) and allow the fixing part (1743) to move away from the limiting protrusion (172).

6. A medical adhesive sealing system for varicose veins of the lower extremities according to claim 5, characterized in that, A rack guide groove (24) is provided in the handheld body (2) at a position colinear with the axis of the adapter (1). The rack guide groove (24) has a convex cross-section when the handheld body (2) is engaged, so that the rack (14) can be inserted and the rack (14) can slide in the rack guide groove (24). The rack (14) is flat and bar-shaped, with one end near the adapter (1) being cylindrical. The surface facing the elastic trigger (11) is serrated, and a rack limiting plate (141) perpendicular to the body is provided on the opposite side. A clamping block base (161) is provided on the top of the rack guide groove (24) on one side of the handheld body A (21). The clamping block base (161) is a rectangular deep hole. The clamping block (16) is rectangular in shape, which facilitates installation. The assembly has clamping block pressure plates (162) on both sides for clamping. The clamping block pressure plates (162) have a certain elasticity. Each clamping block pressure plate (162) is similar to the shape of a "7". The corner can directly contact the rack limiting plate (141) and press it tightly. The hand-held body B (22) is provided with a clamping block push plate (163) at the position corresponding to the clamping block base (161). Under the combined action of the clamping block push plate (163) and the clamping block base (161), it can be ensured that after the hand-held body A (21) and the hand-held body B (22) are fastened, the clamping block (16) can press the rack limiting plate (141) on the rack (14) tightly, so that a certain friction force is generated on the contact surface of the clamping block pressure plate (162) and the rack limiting plate (141) to prevent it from sliding easily.

7. A medical adhesive sealing system for varicose veins of the lower extremities according to claim 6, characterized in that, A hinge bearing seat (131) is provided on the lower surface of the ratchet (13). With the cooperation of the hinge bearing seat (131) and the hinge shaft (114), the ratchet (13) and the elastic trigger (11) can be hinged together. The end of the ratchet (13) near the adapter (1) is a flat cuboid with a serrated protrusion at the top, which can cooperate with the serrations on the rack (14) to hold the rack (14). Trapezoidal ratchet baffles (132) are provided on both sides of the protrusion. A V-shaped ratchet reset plate (133) is connected to the end of the ratchet (13) away from the adapter (1). The ratchet (13) and the ratchet reset plate (133) have a certain elasticity. When in use, the end of the ratchet reset plate (133) away from the ratchet (13) is close to the lower surface of the rack guide groove (24). A release button (15) is provided on the top of the ratchet (13). The release button (15) has a flat rectangular bottom, with its bottom surface in contact with the upper surface of the ratchet baffle (132), and a square groove in the middle that allows the rack limiting plate (141) to pass through. The top is cylindrical and extends out of the handheld body (2). The handheld body (2) has a release button hole (151) that allows the release button (15) to pass through. The release button (15) has a long strip-shaped button connecting rod (152) on the side away from the adapter (1). The end of the button connecting rod (152) has a button pivot (153). The button pivot (153) is cylindrical. The handheld body (2) has a button pivot bearing seat (154) at the position of the button pivot (153). The release button (15) is hinged to the handheld body (2) through the cooperation of the button pivot (153) and the button pivot bearing seat (154).

8. A medical adhesive sealing system for varicose veins of the lower extremities according to claim 7, characterized in that, A connecting shaft (101) is provided at the connection between the adapter (1) and the handheld body (2). Two adapter slots (102) are provided on the connecting shaft (101), and the two adapter slots (102) are spaced 180° apart. One end of each adapter slot (102) has a protrusion. A rack guide post (103) extends from the connecting shaft (101) toward the adapter (1). The rack guide post (103) is hollow, and its inner diameter is slightly larger than the outer diameter of the cylinder at the end of the rack (14). Its length can extend to the end of the adapter (1) away from the handheld body (2). The adapter (1) is a frustum-shaped shell. The side closer to the handheld body (2) has a larger diameter and is completely open. An L-shaped adapter groove is provided at the position corresponding to the adapter slot (102). (105) The adapter groove (105) is also provided with a small recess at the end. When the adapter (1) and the handheld body (2) are connected, the adapter card (102) can be inserted into the adapter groove (105). Then the adapter (1) is rotated ninety degrees so that the protrusion on the adapter card (102) is inserted into the recess in the adapter groove (105) to fix the adapter (1) and the handheld body (2). The adapter (1) is provided with an elliptical adapter opening (106) at one end away from the handheld body (2). The inner side of the arc edge of the adapter opening (106) is provided with a row of opening serrations (107). The upper and lower sides of the inner side of the adapter opening (106) in the direction perpendicular to the adapter opening (106) are respectively provided with a syringe limiting protrusion (108).

9. A medical adhesive sealing system for varicose veins of the lower extremities according to claim 8, characterized in that, One end of the dilator (003) is provided with a dilator connector (0031); one end of the guide sheath (004) is provided with a guide sheath connector (0041), and the guide sheath (004) is provided with laser graduation marks; one end of the catheter (005) is provided with a catheter connector (0051); both the dilator (003) and the catheter (005) can be inserted into the guide sheath (004); the dilator (003) can be fitted onto the guidewire (002) and extend forward along the guidewire (002); the dilator connector (0031) and the guide sheath connector (0051) are provided with laser graduation marks; one end of the catheter (005) is provided with a catheter connector (0051); both the dilator (003) and the guide sheath connector (0051) are provided with laser graduation marks; one end of the guide sheath (004) is provided with a guide connector (0041); one end of the guide sheath (005) is provided with a guide connector (0041); and one end of the guide sheath (005) is provided with a guide connector (0051). The expansion tube connector (0031) and the guide sheath connector (0041) can be connected using a Luer connector, and the catheter connector (0051) and the guide sheath connector (0041) can be connected using a Luer connector. A retaining ring (007) can lock the expansion tube connector (0031) and the guide sheath connector (0041) or the catheter connector (0051) and the guide sheath connector (0041) together. The retaining ring (007) has a threaded inner ring, which can engage with the threads on the expansion tube connector (0031), the guide sheath connector (0041) and the catheter connector (0051) to lock them together.

10. A medical adhesive sealing system for varicose veins of the lower extremities according to claim 9, characterized in that, The expansion tube (003), the guide sheath (004), and the catheter (005) are all flexible tubes that can be bent.

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