A venous cavity closure device

Abstract

The present invention discloses a venous cavity closure device, which belongs to the field of medical device technology and is intended to solve technical problems existing in existing varicose vein treatment methods, such as incomplete treatment, large surgical damage, and easy skin damage. It includes a handle and a catheter and cable assembly respectively connected to the handle; the catheter includes a coil segment and a non-coil segment; the coil segment is wrapped with multiple sections of heating wire on the outside, and the multiple sections of heating wire are respectively connected to the handle; an adhesive injection mechanism is provided in the handle, and the adhesive injection mechanism is used to inject adhesive into the venous cavity through the catheter. The venous cavity closure device of the present invention, by integrating radiofrequency closure function and adhesive treatment function, can fully utilize the advantages of the two surgical procedures, and can achieve better closure effects for both saphenous veins with larger diameters and thinner veins, thereby broadening the usage scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a venous cavity closing device. Background Art

[0002] Varicose veins of the lower limbs are a common surgical disease, usually caused by venous valve insufficiency, leading to venous reflux. Currently, there are many ways to treat varicose veins, mainly including high ligation and stripping, laser / radiofrequency ablation, foam sclerotherapy, and venous glue (biological glue or tissue glue) treatment. Each method has its own advantages and disadvantages. For example, high ligation and stripping is a thorough treatment, but the surgery is very invasive, with many scars and a high recurrence rate. Thermal treatment technologies such as laser or radiofrequency ablation have good closure effects, but are prone to damage to the skin and saphenous nerve, and cannot treat thinner varicose veins or varicose veins that are flexed and clustered. Foam sclerotherapy is not thorough enough, especially for large varicose veins, with poor efficacy, high recurrence rate, and often secondary to thrombophlebitis. Venous glue treatment does not require general anesthesia and does not cause thermal damage, but its therapeutic effect depends on biological glue preparations and its efficacy is poor for larger blood vessels.

[0003] Therefore, there remains a need for improved devices and methods to mitigate or eliminate the adverse effects of current varicose vein treatment modalities. Summary of the Invention

[0004] The purpose of the present invention is to provide a venous cavity closure device to solve the above-mentioned technical problems existing in the existing varicose vein treatment methods.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The present invention provides a venous cavity closing device, comprising a handle, and a catheter and a cable assembly respectively connected to the handle;

[0007] The catheter includes a coil section and a non-coil section, and a plurality of heating wires are arranged outside the coil section. Each heating wire has a preset distribution length, and intervals are formed between adjacent heating wires.

[0008] An adhesive injection mechanism is provided in the handle, and the adhesive injection mechanism is used for injecting adhesive into the venous cavity through the catheter.

[0009] Optionally or preferably, the coil segment includes a PI tube, a supporting PEEK tube, an FEP heat shrink tube and a ball head; the supporting PEEK tube is sleeved outside the PI tube, the ball head is arranged at the front end of the PI tube and the supporting PEEK tube, multiple sections of the heating wire are sequentially wound around the supporting PEEK tube, and the FEP heat shrink tube is sleeved outside the multiple sections of the heating wire;

[0010] The non-coil section includes the PI tube and a ring-printed PEEK tube sleeved outside the PI tube. One end of the ring-printed PEEK tube is connected to the end of the supporting PEEK tube, and the outer surface of the ring-printed PEEK tube is provided with scale marks.

[0011] Optionally or preferably, the plurality of heating wires are wound around the supporting PEEK tube in a double-row parallel winding manner;

[0012] The supporting PEEK tube is provided with a plurality of groups of unilateral holes, each group of unilateral holes includes two unilateral holes, and the two unilateral holes in each group of unilateral holes are arranged at different positions on the circumference of the supporting PEEK tube; the unilateral holes between each group are staggeredly distributed on the circumference of the supporting PEEK tube; the two ends of each section of the heating wire respectively pass through the corresponding unilateral holes in the corresponding group and are arranged in the gap between the supporting PEEK tube and the PI tube.

[0013] By providing a single-sided hole near the end of each heating wire on the supporting PEEK tube, and allowing the ends of the double-row heating wires to pass through the single-sided holes and enter the interior of the supporting PEEK tube, the diameter of the catheter can be avoided from increasing while multiple heating wires are provided.

[0014] Optionally or preferably, the multiple sections of heating wire include a first section of heating wire, a second section of heating wire and a third section of heating wire arranged in sequence; the first section of heating wire is wound around the side of the supporting PEEK tube away from the handle, and a thermocouple temperature sensing head is provided in the first section of heating wire.

[0015] Optionally or preferably, a PCB board is provided in the handle; the plurality of sections of the heating wire and the thermocouple temperature sensing head are electrically connected to the PCB board respectively;

[0016] The handle is provided with a through hole, and a button cover is provided in the through hole; the button cover is used to trigger the micro button switch on the PCB board;

[0017] One end of the second heating wire is connected to one end of the first heating wire, and the other end of the second heating wire is connected to one end of the third heating wire.

[0018] Optionally or preferably, the adhesive injection mechanism includes an adhesive chamber, an adhesive injection assembly and a hose;

[0019] One end of the hose is communicated with the adhesive chamber, and the other end is communicated with the catheter after passing through the adhesive injection assembly.

[0020] Optionally or preferably, the adhesive injection assembly includes a knob, a turntable portion and a fixing seat;

[0021] The knob includes a screw cap and a screw rod, and a plurality of first protruding blocks are symmetrically arranged on the side wall of the lower portion of the screw rod;

[0022] The turntable portion includes a circular disc and a receiving column arranged on the lower end surface of the circular disc, wherein the receiving column has a connecting hole with a waist-shaped cross-section; a plurality of first notches are symmetrically opened on the bottom side surface of the receiving column;

[0023] The screw rod passes through the connecting hole and the first protruding blocks can be engaged with the first notches under the action of external force;

[0024] The knob and the turntable are rotatably arranged in the fixing seat through the receiving column;

[0025] A plurality of convex columns are arranged on the upper end surface of the disc, and the hose is arranged in a space between the outer sides of the plurality of convex columns and the inner side of the fixing seat.

[0026] Optionally or preferably, a spring is sleeved on the screwing rod, a convex ring is provided on the side wall of the screwing cap, a plurality of second protruding blocks are symmetrically provided on the convex ring, and the plurality of second protruding blocks and the plurality of first protruding blocks are staggered in the circumferential direction;

[0027] The handle housing is provided with an annular protrusion facing inward; a plurality of second notches are symmetrically provided on the annular protrusion;

[0028] When the spring is in an uncompressed state, the plurality of second protruding blocks engage with the plurality of second notches, and the plurality of first protruding blocks are located inside the connecting hole;

[0029] When the spring is in a compressed state, the plurality of first protruding blocks are engaged with the plurality of first notches.

[0030] The present invention rotates the turntable portion by rotating the knob, so that the adhesive in the hose is pressed into the PI tube under the pressure of multiple protrusions and the inner wall of the fixing seat, and finally the adhesive flows out from the front end of the PI tube, acts on the target treatment position, and adheres the diseased vein. The knob can be unlocked or locked by pressing / releasing it, making it easier for the operator to control the extrusion of the adhesive.

[0031] Optionally or preferably, a hose closing mechanism is further provided between the adhesive chamber and the adhesive injection assembly;

[0032] The hose closing mechanism includes a screw, a transverse opening and a longitudinal opening, wherein the transverse opening is connected to the longitudinal opening; the hose passes through the transverse opening;

[0033] The inner surface of the longitudinal through-hole is provided with a thread, and the screw is threadably connected to the longitudinal through-hole and is used to control the on / off of the hose in the transverse through-hole.

[0034] Optionally or preferably, the adhesive chamber includes an adhesive injection port, an air inlet, and an air outlet;

[0035] The adhesive injection port is used to inject adhesive into the adhesive chamber;

[0036] The air inlet is used to provide a smooth atmospheric passage during the process of injecting adhesive by the adhesive injection assembly;

[0037] The exhaust port is used to provide a smooth atmospheric passage during the process of injecting adhesive into the adhesive chamber.

[0038] Based on the above technical solution, the present invention can produce at least the following technical effects:

[0039] The present invention provides a venous cavity closure device that integrates radiofrequency closure and adhesive therapy functions, fully leveraging the advantages of both procedures. It achieves good closure effects for both larger saphenous veins and smaller veins (e.g., communicating branches), broadening its application scenarios.

[0040] The multiple heating wire coils wrapped around the coil segments allow for ablation and closure of a small area using a shorter coil alone, or for a larger area using multiple heating wire coils. By selecting different lengths of ablation closure range, the device can accommodate veins of varying lengths, further broadening its application scenarios.

[0041] By designing the wiring of the multi-segment heating wire, that is, the connection method of the wire end, the number of wire bundles located in the cavity between the PI tube and the supporting PEEK tube can be reduced, thereby avoiding increasing the diameter of the catheter;

[0042] By opening a single-sided hole near the end of each heating wire segment on the supporting PEEK tube, it is possible to avoid increasing the diameter of the catheter when multiple heating wire segments are provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Schematic diagram of the overall structure of the venous cavity closure device of the present invention;

[0044] Figure 2 Schematic diagram of the structure of the catheter coil section in the venous cavity closure device of the present invention;

[0045] Figure 3 yes Figure 2 A partial enlarged view of part A in the middle;

[0046] Figure 4 yes Figure 2 A partial enlarged view of part B in the middle;

[0047] Figure 5 is a cross-sectional view of a catheter coil segment in the venous cavity closure device of the present invention;

[0048] Figure 6 yes Figure 1 A partial enlarged view of the middle C section;

[0049] Figure 7 This is a circuit connection diagram of multiple heating wires in the venous cavity closure device of the present invention;

[0050] Figure 8 Schematic diagram of the structure of the adhesive injection mechanism in the venous cavity closure device of the present invention;

[0051] Figure 9 This is a schematic structural diagram of the adhesive injection assembly (omitting the upper cover of the fixing seat) in the venous cavity closure device of the present invention;

[0052] Figure 10 It is a schematic structural diagram of the knob in the venous cavity closing device of the present invention;

[0053] Figure 11 is a bottom view of the knob in the venous cavity closure device of the present invention;

[0054] Figure 12 Schematic diagram of the structure of the rotating disk portion of the venous cavity closure device of the present invention;

[0055] Figure 13 is a bottom view of the rotating disk portion of the venous cavity closure device of the present invention;

[0056] Figure 14 This is a schematic diagram of the assembly of the knob and handle in the venous cavity closure device of the present invention;

[0057] Figure 15 This is a schematic diagram of the overall structure of the handle in the venous cavity closure device of the present invention. Figure 1 ;

[0058] Figure 16 This is a schematic diagram of the overall structure of the handle in the venous cavity closure device of the present invention. Figure 2 ;

[0059] Figure 17 is a cross-sectional view of a handle in the venous cavity closure device of the present invention;

[0060] Figure 18 yes Figure 17 A partial enlarged view of part D in the middle.

[0061] In the figure: 100, catheter; 110, coil segment; 111, PI tube; 112, supporting PEEK tube; 113, heating wire; 1131, first section of heating wire; 1132, second section of heating wire; 1133, third section of heating wire; 114, ring-printed PEEK tube; 115, single-side hole; 116, thermocouple temperature sensor; 117, FEP heat shrink tubing; 118, ball head; 120, non-coil segment; 200, handle; 210, adhesive injection mechanism; 211, adhesive chamber; 212, adhesive injection assembly; 213, hose; 214, adhesive injection port; 215, air inlet; 216 , exhaust port; 217, knob; 2171, screw cap; 2172, screw rod; 2173, convex ring; 2175, first protruding block; 2174, second protruding block; 218, spring; 219, turntable part; 2191, disc; 2192, receiving column; 2193, connecting hole; 2194, first notch; 2195, convex column; 2110, fixing seat; 220, PCB board; 230, annular protrusion; 231, second notch; 240, hose closing mechanism; 241, horizontal opening; 242, longitudinal opening; 243, screw; 250, button cover; 300, cable assembly. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work shall fall within the scope of protection of the present invention.

[0063] Example

[0064] See also Figure 1 A venous cavity closing device includes a handle 200, a catheter 100 and a cable assembly 300; one end of the catheter 100 is connected to the handle 200, and the other end acts on the surgical site; one end of the cable assembly 300 is connected to the handle 200, and the other end is connected to the host.

[0065] See also Figures 2 to 6 In this embodiment, the catheter 100 includes a coil segment 110 and a non-coil segment 120; the coil segment 110 is arranged at the front end of the catheter 100, and includes a PI tube 111, a supporting PEEK tube 112 sleeved on the outside of the PI tube 111, and an elliptical ball head 118 arranged at the front end of the coil segment 100; multiple sections of heating wire 113 are wrapped around the outside of the supporting PEEK tube 112, and the heating wire 113 is connected to the energy host through the handle 200 and the cable assembly 300, which is used to perform radiofrequency treatment on the surgical site.

[0066] In order to improve the treatment effect on veins of different lengths, in this embodiment, multiple sections of heating wires 133 are provided to achieve treatment of different lengths and ranges. The multiple sections of heating wires 133 are respectively the first section of heating wire 1131, the second section of heating wire 1132 and the third section of heating wire 1133. It can be understood that the operator can use the multiple sections of heating wire 133 in this embodiment to achieve at least three usage methods, namely: using the first section of heating wire 1131 alone, the first section of heating wire 1131 combined with the second section of heating wire 1132, and the first section of heating wire 1131, the second section of heating wire 1132 combined with the third section of heating wire 1133.

[0067] Since intravenous radiofrequency closure surgery is performed by cauterizing and withdrawing the catheter at the same time, a common problem when using a one-segment heating wire catheter for treatment is that when withdrawing to the end of the varicose vein, there are still 2-3 cm of varicose veins that need to be treated. However, if a 7 cm heating wire is continued to be used for cauterization, it will either cause excessive damage to the already burned tissue or the heating wire may be withdrawn from the wound, failing to meet the safety requirements of the surgery. Therefore, the current practice is to abandon the treatment of the remaining 2-3 cm varicose veins or replace the catheter with a shorter heating wire. However, by using the multi-segment heating wire of this solution, it is possible to directly switch to using the first segment of the heating wire to cauterize the remaining 2-3 cm varicose veins, resulting in a more thorough treatment and no need to replace closing catheters of different specifications during the operation, thus saving operation time.

[0068] Compared with the setting of a single-segment heating wire, in this embodiment, since multiple segments of heating wire 133 are provided, in order to avoid an increase in the diameter of the catheter 100, in this embodiment, the multiple segments of heating wire 113 are wound in double rows and parallel to each other on the outside of the supporting PEEK tube 112. Two single-sided holes 115 with a certain interval along the circumference are provided on the PEEK supporting tube corresponding to the end position of each segment of heating wire 133. The ends of the double-row heating wires 133 respectively pass through the above-mentioned two single-sided holes 155 and penetrate into the interior of the supporting PEEK tube 112 and are finally connected to the interior of the handle 200; since there are three segments of heating wire 133, there are three groups (two in each group) of single-sided holes 115 on the supporting PEEK tube 112, and the three groups of single-sided holes 115 are staggeredly distributed in the circumference of the supporting PEEK tube 112.

[0069] Since two staggered single-sided holes 115 are provided at the end of each heating wire segment 133, the situation where the two ends of each heating wire segment 113 enter through the same single-sided hole 115 (in this case, the diameter of the supporting PEEK tube 112 needs to be increased) is avoided, and the gap between the supporting PEEK tube 112 and the PI tube 111 is fully utilized. Therefore, compared with the diameter of the catheter of a single-section heating wire, the diameter of the entire catheter 100 does not increase.

[0070] It should be noted that the end of the third heating wire 1133 may no longer pass through the single-sided hole 115 to penetrate into the supporting PEEK tube 112 , but may directly extend backward through the outside of the supporting PEEK tube into the ring-printed PEEK tube 114 .

[0071] In addition, since the conductors of the above-mentioned multiple heating wires 113 are wrapped around the PI tube 111 and extend backward into the handle 200, in order to avoid the increase in the diameter of the non-coil segment 120 due to the increase in the number of conductors, the connection method of the conductors of the heating wire 113 is designed in this embodiment.

[0072] See also Figure 7 Specifically, the two end terminals of the first heating wire 1131 are a1 and a2 respectively; the two end terminals of the second heating wire 1132 are b1 and b2 respectively; the two end terminals of the third heating wire 1133 are c1 and c2 respectively; among them, b1 is connected to c1, b2 is connected to c2, a1, a2, c1, and c2 extend backward and are electrically connected to the PCB board 220; therefore, the 6 wires are merged into 4 in the ring-printed PEEK tube, thereby avoiding an increase in the diameter of the non-coil segment 120.

[0073] See also Figure 14 and Figure 17 In this embodiment, the above-mentioned PCB board 220 is fixed to the upper shell of the handle 200, and the ends of the multi-segment heating wire 133 are welded to the PCB board 220. A through hole is provided on the upper shell of the handle 200, and a button cover 250 is provided in the through hole. By pressing the button cover 250, the micro button switch on the PCB board can be indirectly triggered, thereby realizing the start and stop of the energy output of the intravenous radiofrequency closing catheter; in addition, an indicator light is also provided on the PCB board 220, which can flash when energy is excited to remind the operator.

[0074] Please continue reading Figure 2 and Figure 3 In this embodiment, a thermocouple temperature sensor 115 is also provided between the first section of the heating wire 1131. It extends from the gap between the supporting PEEK tube 112 and the PI tube 111 through a small hole, and is finally stuck in the double-row and wound heating wire. There is also an insulating layer on the outside of the thermocouple wire, which is electrically connected to the PCB board 229 through the wire.

[0075] In this embodiment, the multi-segment heating wire 113 and the thermocouple temperature sensing head 115 are bonded to the supporting PEEK tube 112 by UV glue, and the multi-segment heating wire 113 is covered with an FEP heat shrink tube 117.

[0076] In this embodiment, the non-coil section 120 includes a ring-printed PEEK tube 114, which is sleeved on the outer side of the end of the supporting PEEK tube 112 and fixed with UC glue. The outer surface of the ring-printed PEEK tube 114 is provided with scale marks.

[0077] In this embodiment, the PI tube 111 serves as a guidewire channel and an adhesive injection channel. It is arranged in the supporting PEEK tube 122 and extends all the way to the ring-printed PEEK tube 114. The end of the PI tube 111 passes through the ring-printed PEEK tube 114 and enters the interior of the handle 200, and is connected to the guidewire inlet and the adhesive injection mechanism 210 on the handle 200. The connection is sealed with UV glue; in addition, the elliptical ball head 118 located at the front end of the coil segment 100 is molded with UV glue, which is used to fix the PI tube 111 to the supporting PEEK tube 112, and the elliptical ball head 118 can prevent the front end of the catheter 100 from causing damage to the blood vessel.

[0078] This embodiment provides a venous cavity closure device that integrates radiofrequency closure function and adhesive treatment function, thereby broadening the application scenarios and achieving better treatment effects.

[0079] See also Figures 8 to 18 In this embodiment, an adhesive injection mechanism 210 is further provided in the handle 200 , and the adhesive injection mechanism 210 can inject adhesive into the venous cavity through the catheter 100 .

[0080] Specifically, the adhesive injection mechanism 210 includes an adhesive chamber 211, an adhesive injection assembly 212, and a hose 213. The adhesive chamber 211 includes an adhesive injection port 214, an air inlet 215, and an exhaust port 216. In actual operation, adhesive is injected into the adhesive chamber 211 through the adhesive injection port 214. The exhaust port 216 facilitates smooth injection of adhesive into the adhesive chamber 211, and the air inlet 215 facilitates smooth discharge of adhesive from the adhesive chamber 211. The adhesive chamber 211 can be fixedly mounted in the handle 200 or detachably mounted therein.

[0081] The adhesive injection assembly 212 includes a knob 217, a spring 218, a turntable portion 219 and a fixed seat 2110; the knob 217 includes a screw cap 2171 and a screw rod 2172; a convex ring 2173 is provided on the lower side wall of the screw cap 2171, and two second protruding blocks 2174 are symmetrically provided on the convex ring 2173, and two first protruding blocks 2175 are symmetrically provided on the lower side wall of the screw rod 2172, and the two second protruding blocks 2174 and the two first protruding blocks 2175 are staggered in the circumferential direction.

[0082] It should be noted that Figure 9A structural schematic diagram of the adhesive injection assembly is shown. In order to reflect the internal structure of the adhesive injection assembly, the upper cover part of the fixing seat 2110 is omitted; normally, the upper end of the spring 218 abuts against the lower part of the knob 217, and the lower end of the spring 218 abuts against the upper cover of the fixing seat 2110.

[0083] The above-mentioned turntable part 219 includes a circular disc 2191, and the lower end surface of the circular disc 2191 is provided with a hollow receiving column 2192. The receiving column 2192 is hollow and has a connecting hole 2193 with a waist-shaped cross-section. Two symmetrical first notches 2194 are opened on the side surface of the bottom of the receiving column 2192; a bearing is provided on the outer side of the middle part of the receiving column 2192, and the circular disc 2191 is rotatably connected to the fixed seat 224 through the receiving column 2192 and the bearing provided on the receiving column 2192.

[0084] At the same time, four protrusions 2195 are also provided on the upper end surface of the disc 2191; one end of the above-mentioned hose is connected to the adhesive chamber 211, and the other end is wrapped along the outside of the above-mentioned four protrusions 2195 and finally connected to the PI tube 111.

[0085] In this embodiment, an annular protrusion 230 facing inward is provided on the inner surface of the upper shell of the handle 200, and two second notches 231 are symmetrically provided on the annular protrusion 230; when the operator does not press the knob 217 downward, that is, when the spring 218 is in an uncompressed state, the two second protruding blocks 2174 are engaged with the second notches 231, and at this time, the first protruding block 2175 is located inside the waist-shaped connecting hole 2193; when the operator presses down and rotates the knob 217, that is, When the spring 218 is in a compressed state, the first protruding block 2175 located at the lower part of the screw rod 2172 engages with the two first notches 2194 at the lower part of the receiving column 2192. At this time, the knob 217 can drive the turntable part 219 to rotate together, so that the adhesive in the hose 213 is pressed into the PI tube 111 under the pressure of multiple protruding columns 2195 and the inner wall of the fixing seat 2110, and finally the adhesive flows out from the front end of the PI tube 111, acts on the target treatment position, and bonds the diseased veins.

[0086] Furthermore, in order to prevent the adhesive from overflowing from the hose 213 when the adhesive is replenished into the adhesive chamber 211 through the adhesive injection port 214 , in this embodiment, a hose closing mechanism 240 is further provided between the adhesive chamber 211 and the adhesive injection assembly 212 .

[0087] Specifically, the hose closing mechanism 240 includes a screw 243 and a communicating transverse opening 241 and longitudinal opening 242. The hose 213 is inserted through the transverse opening 241. The inner surface of the longitudinal opening 242 is threaded. The screw 243 is threadedly connected to the longitudinal opening 242 and acts on the hose 213 within the transverse opening 241. To prevent adhesive from overflowing, the operator can rotate the screw 243 all the way to temporarily close the hose 213 when replenishing the adhesive, thereby preventing the adhesive from overflowing.

[0088] The specific usage of the venous cavity closure device provided in this embodiment is as follows:

[0089] (1) Using the radiofrequency function alone to close varicose veins: When treating varicose veins of the great saphenous vein, if there are no or a small number of varicose veins with a smaller diameter, the radiofrequency function alone can be used to close the varicose veins. Specifically, the cable assembly 300 is connected to the energy host, and different sections of heating wire 113 can be selected according to the length of the vein to be closed; for example, the length of the first section of heating wire 1131 and the second section of heating wire 1132 are both 2.5 cm, and the length of the third section of heating wire 1133 is 3 cm; therefore, the length of the varicose vein that can be treated by one excitation of radiofrequency energy can be 2.5 cm, 5 cm and 8 cm; compared with the traditional one-section heating wire (the heating wire is usually of two specifications of 3 cm and 7 cm), only one catheter can be used to achieve both small-scale and large-scale burning.

[0090] (2) Using adhesive alone to close varicose veins: When there are many varicose veins with smaller diameters, adhesive alone can be used to close the varicose veins; specifically, first, unlock the knob 217 on the handle 200 outside the human body, rotate the knob 217, pump the adhesive in the adhesive chamber 211 into the PI tube 111, and discharge any air that may be present in the PI tube 111, then insert the catheter 100 into the varicose vein to be treated through the incision on the human body, rotate the knob 217, inject the adhesive into the varicose vein, and press to close the varicose vein. For a more specific adhesive application method, refer to the existing technology and will not be described in detail here.

[0091] (3) Use radiofrequency heating first, then use adhesive to close the varicose veins: When there are both large varicose veins and a large number of small varicose veins, the two procedures can be combined. That is, radiofrequency heating is first used to burn the large varicose veins, and the remaining small varicose veins can be closed with adhesive.

[0092] During actual surgery, the usage scenarios are not limited to the above examples. Doctors can freely choose functions based on the patient's actual situation.

[0093] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0094] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A venous cavity closure device, characterized in that: It comprises a handle (200), and a catheter (100) and a cable assembly (300) respectively connected to the handle (200); The catheter (100) comprises a coil section (110) and a non-coil section (120); a plurality of heating wires (113) are arranged outside the coil section (110); each heating wire (113) has a preset distribution length, and intervals are formed between adjacent heating wires (113); The coil segment (110) comprises a PI tube (111), a supporting PEEK tube (112), an FEP heat shrink tube (117) and a ball head (118); the supporting PEEK tube (112) is sleeved outside the PI tube (111); the ball head (118) is arranged at the front end of the PI tube (111) and the supporting PEEK tube (112); multiple sections of the heating wire (113) are sequentially wound around the supporting PEEK tube (112) in a double-row parallel winding manner; and the FEP heat shrink tube (117) is sleeved outside the multiple sections of the heating wire (113); A plurality of groups of unilateral holes (115) are provided on the supporting PEEK tube (112), each group of unilateral holes (115) includes two unilateral holes (115), and the two unilateral holes (115) in each group of unilateral holes (115) are arranged at different positions on the circumference of the supporting PEEK tube (112), and the unilateral holes between each group are staggeredly distributed on the circumference of the supporting PEEK tube (112); the two ends of each section of the heating wire (113) respectively pass through the corresponding unilateral holes (115) in the corresponding group and are arranged in the gap between the supporting PEEK tube (112) and the PI tube (111); The multiple sections of heating wire (113) include a first section of heating wire (1131), a second section of heating wire (1132), and a third section of heating wire (1133) which are arranged in sequence; One end of the second heating wire (1132) is connected to one end of the first heating wire (1131), and the other end of the second heating wire (1132) is connected to one end of the third heating wire (1133); An adhesive injection mechanism (210) is provided in the handle (200), and the adhesive injection mechanism (210) is used to inject adhesive into the venous cavity through the catheter (100).

2. The venous cavity closure device according to claim 1, characterized in that: The non-coil section (120) comprises the PI tube (111) and a ring-printed PEEK tube (114) sleeved outside the PI tube (111); one end of the ring-printed PEEK tube (114) is connected to the end of the supporting PEEK tube (112); and a scale mark is provided on the outer surface of the ring-printed PEEK tube (114).

3. The venous cavity closure device according to claim 1, characterized in that: The first section of the heating wire (1131) is wound around a side of the supporting PEEK tube (112) away from the handle (200), and a thermocouple temperature sensing head (116) is provided inside the first section of the heating wire (1131).

4. The venous cavity closure device according to claim 1, characterized in that: The adhesive injection mechanism (210) comprises an adhesive chamber (211), an adhesive injection assembly (212) and a hose (213); One end of the hose (213) is connected to the adhesive chamber (211), and the other end is connected to the catheter (100) after passing through the adhesive injection assembly (212).

5. The venous cavity closure device according to claim 4, characterized in that: The adhesive injection assembly (212) includes a knob (217), a turntable portion (219) and a fixing seat (2110); The knob (217) comprises a screw cap (2171) and a screw rod (2172), and a plurality of first protruding blocks (2175) are symmetrically arranged on the side wall of the lower portion of the screw rod (2172); The turntable portion (219) includes a circular disc (2191) and a receiving column (2192) disposed on the lower end surface of the circular disc (2191). The receiving column (2192) has a connecting hole (2193) with a waist-shaped cross section. A plurality of first notches (2194) are symmetrically formed on the bottom side surface of the receiving column (2192). The screw rod (2172) passes through the connecting hole (2193), and the plurality of first protruding blocks (2175) can be engaged with the plurality of first notches (2194) under the action of external force; The knob (217) and the turntable portion (219) are rotatably disposed in the fixing seat (2110) via the receiving column (2192); A plurality of bosses (2195) are provided on the upper end surface of the disc (2191), and the hose (213) is provided in a space between the outside of the plurality of bosses (2195) and the inside of the fixing seat (2110).

6. The venous cavity closure device according to claim 5, characterized in that: The screw rod (2172) is sleeved with a spring (218), the side wall of the screw cap (2171) is provided with a convex ring (2173), and the convex ring (2173) is symmetrically provided with a plurality of second protruding blocks (2174), and the plurality of second protruding blocks (2174) and the plurality of first protruding blocks (2175) are staggered in the circumferential direction; The inner surface of the outer shell of the handle (200) is provided with an annular protrusion (230) facing inward; a plurality of second notches (231) are symmetrically provided on the annular protrusion (230); When the spring (218) is in an uncompressed state, the plurality of second protruding blocks (2174) engage with the plurality of second notches (231), and the plurality of first protruding blocks (2175) are located inside the connecting hole (2193); When the spring (218) is in a compressed state, the plurality of first protruding blocks (2175) engage with the plurality of first notches (2194).

7. The venous cavity closure device according to claim 4, characterized in that: A hose closing mechanism (240) is further provided between the adhesive chamber (211) and the adhesive injection assembly (212); The hose closing mechanism (240) comprises a screw (243), a transverse opening (241) and a longitudinal opening (242), wherein the transverse opening (241) is connected to the longitudinal opening (242), and the hose (213) passes through the transverse opening (241); The inner surface of the longitudinal opening (242) is provided with a thread, and the screw (243) is threadedly connected to the longitudinal opening (242) and is used to control the opening and closing of the hose (213) in the transverse opening (241).

8. The venous cavity closure device according to claim 4, characterized in that: The adhesive chamber (211) includes an adhesive injection port (214), an air inlet (215), and an air outlet (216); The adhesive injection port (214) is used to inject adhesive into the adhesive chamber (211); The air inlet (215) is used to provide a smooth atmospheric passage during the process of injecting adhesive by the adhesive injection component (212); The exhaust port (216) is used to provide a smooth atmospheric passage during the process of injecting adhesive into the adhesive chamber (211).

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