Great saphenous vein stripping device

Abstract

The utility model relates to medical instruments, in particular to a great saphenous vein stripping device. Comprising an inner sheath cannula, an outer sheath cutter and an inner core, an inner cavity with two axial ends communicated is arranged in the middle of the inner sheath cannula, an outer cavity is arranged in the inner sheath cannula, the outer cavity is connected with an external injection device so that anesthesia swelling liquid can be injected into the outer cavity, a plurality of hole channels are arranged in the outer cavity, and the outer sheath cutter is of a tubular structure and movably connected to the periphery of the inner sheath cannula in a sleeved mode. An annular cutting edge is arranged at the tail end of the outer sheath cutter; the inner core comprises a core tube, an abduction part, a blocking part and an excitation part; the plurality of external expanding parts are connected to the tail end of the core tube, each external expanding part has a folded state of being folded to the inner core and an external expanding state of being expanded outwards in the radial direction, the blocking parts are connected with the external expanding parts to enable the external expanding parts to be kept in the folded state, and the excitation parts can release the external expanding parts to enable the external expanding parts to enter the external expanding state from the folded state. The utility model provides a great saphenous vein stripping device. The great saphenous vein stripping device is convenient to use and can improve the stripping success rate.

Description

Technical Field

[0001] The present application relates to a medical device, in particular to a great saphenous vein stripping device. Background Art

[0002] Varicose veins of the great saphenous vein are a common clinical disease with a high incidence rate. The vast majority of varicose vein patients will eventually need surgical treatment. Currently, the treatment of varicose veins is increasingly moving towards minimally invasive surgery. The emergence of anesthetic tumescent fluids has enabled varicose veins to be operated on under local anesthesia, allowing great saphenous vein day surgery to be gradually carried out. However, traditional anesthetic tumescent fluid injections need to be performed under color ultrasound guidance, which cannot be widely popularized in grassroots hospitals and relatively remote areas. Although there are some great saphenous vein anesthesia and stripping devices that do not require color ultrasound guidance in clinical practice for tumescent anesthesia and vein stripping, such devices are still prone to venous trunk rupture during operation and cannot be stripped in one go. Additional incisions are still required, leading to a series of problems such as unsightly and non-minimally invasive appearance, which greatly limits their clinical use. Summary of the Invention

[0003] In view of this, the present application provides a great saphenous vein stripping device, which is easy to use and can improve the stripping success rate.

[0004] In order to achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A great saphenous vein stripping device, characterized in that it comprises an inner sheath cannula, an outer sheath cutter and an inner core; the middle portion of the inner sheath cannula has an inner cavity which is axially connected at both ends and is used to facilitate the passage of the main vein; the inner sheath cannula is provided with an outer cavity inside the body of the inner sheath cannula, the outer cavity is connected to an external injection device, so that an anesthetic swelling fluid can be injected into the outer cavity; a plurality of channels are provided in the outer cavity, some of which are connected to the inner cavity, and the other channels are provided at the end of the inner sheath cannula and are connected to the outside; the outer sheath cutter is a tubular structure which can be movably sleeved on the outer periphery of the inner sheath cannula, and the end of the outer sheath cutter is provided with an annular cutting edge, so that the outer sheath cutter and the inner sheath cannula can sharply cut off the vein branch and the surrounding tissue during the relative movement;

[0006] The inner core includes a core tube, an outward expansion component, a blocking component and an excitation component; the core tube is used to be inserted into the main vein, and multiple outward expansion components are connected to the end of the core tube in a circumferentially spaced manner. The outward expansion component has a folded state folded onto the inner core and an outward expansion state radially expanded outward. The blocking component is connected to the outward expansion component to keep it in the folded state. The excitation component can release the outward expansion component to make it enter the outward expansion state from the folded state. When multiple outward expansion components are expanded, the main vein can expand radially at the corresponding position so that the outer sheath cutter can cut the position, thereby severing the main vein.

[0007] The present application discloses a great saphenous vein stripping device, wherein the lumen of the inner sheath cannula allows passage of the main vein trunk. An injection device can inject anesthetic tumescent fluid into the inner and outer lumens, forming a layer of anesthetic tumescent fluid around the inner sheath cannula. The outer sheath cutter can move relative to the inner sheath cannula. The outer sheath cutter has a sharp annular cutting edge at the end, facilitating sharp severing of branches and surrounding tissue. The inner core is delivered through the main vein trunk to the site to be severed. When the outer extension component is deployed, it forms a "chopping board" that cooperates with the outer sheath cutter to sever the main vein trunk.

[0008] This device requires no color Doppler ultrasound guidance during operation and allows for real-time injection of anesthetic tumescent fluid, facilitating widespread deployment in primary care hospitals without color Doppler ultrasound equipment. The dual-sheath design separates the great saphenous vein trunk from surrounding tissue through the separating action of the anesthetic tumescent fluid and the sharp cutting and stripping action of the outer sheath blade. The great saphenous vein trunk is then extracted through the inner sheath, avoiding trunk fractures caused by excessive traction and stimulation, and improving the success rate of stripping. Furthermore, the unique auxiliary disconnection core allows for distal trunk disconnection without the need for a second external incision, resulting in minimally invasive and aesthetically pleasing procedures.

[0009] In some embodiments, the outward expansion component is an outward expansion spring fixedly provided on one side of the core tube, the outward expansion spring maintains an elastic force for elastic outward expansion, the core tube is formed with a hole at a position corresponding to the outward expansion spring, and the blocking component is a blocking ring connected to the inner wall of each outward expansion spring, the blocking ring is stuck in the core tube, and limits each outward expansion spring from expanding outward.

[0010] In some embodiments, the outward extension component is an outward extension spring piece fixedly provided on one side of the core tube, and the outward extension spring piece maintains an elastic force for elastic outward extension, and the blocking component is a rivet connected to the automatic end of the outward extension spring piece and riveted to the core tube.

[0011] In some embodiments, the fixed connection method of the outward-extending spring piece and the core tube is selected from one of an integral connection, glue fixation, riveting connection and bolt connection.

[0012] In some embodiments, the excitation component includes a movable rod movably arranged in the core tube, and a cutting knife is provided on the outer periphery of the end of the movable rod. When the movable rod moves toward the end, the cutting knife can destroy the blocking component, so that the outward shrapnel is automatically expanded.

[0013] In some embodiments, a core tube extends from the other end of the movable rod, and a spring is sleeved on the outer periphery of the movable rod and connected between the core tube and the movable rod to keep the movable rod in its initial state. Pressing the movable rod forward can move the movable rod toward the end.

[0014] In some embodiments, the outward extension component is a rocker arm with one end hinged to the inner core rod, a sliding sleeve is movably mounted on the outer periphery of the core tube, a connecting rod is arranged between the sliding sleeve and the rocker arm, and the two ends of the connecting rod are respectively hinged to the rocker arm and the sliding sleeve, so that when the sliding sleeve moves toward the end direction, the rocker arm unfolds in the form of an umbrella.

[0015] In some embodiments, the excitation component is a push rod connected to the sliding sleeve.

[0016] In some embodiments, the excitation component includes a tension spring for driving the slide to move forward and a button spring arranged on the core tube. The hook head of the button spring is used to hook the slide. When the button spring is pressed, the hook head releases the slide in a rotational manner to move it forward.

[0017] It can be seen from the above technical solution that this application has at least the following advantages and positive effects:

[0018] 1. The device does not require color ultrasound guidance during operation and can inject anesthetic tumescent fluid in real time, making it convenient for widespread use in grassroots hospitals without color ultrasound conditions.

[0019] 2. Double sheath design separates the great saphenous vein trunk from the surrounding tissues through the separating effect of the anesthetic swelling fluid and the sharp cutting and stripping effect of the outer sheath knife. The great saphenous vein trunk is led out through the inner sheath, avoiding trunk breakage caused by excessive traction and excessive stimulation, and improving the success rate of stripping.

[0020] 3. This device can be used to strip the great saphenous vein trunk without the need for additional guide wires or other equipment.

[0021] 4. The unique inner core for auxiliary disconnection can realize the disconnection of the distal trunk without the need for a second external incision, which is minimally invasive and beautiful.

[0022] 5. Simple structure, convenient operation, easy to master and implement, and convenient for clinical development. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the inner sheath cannula and the outer sheath cutter in the first embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the use status of the inner sheath cannula and the outer sheath cutter in the first embodiment of the present application;

[0025] Figure 3 A schematic structural diagram of the inner core in the first embodiment of the present application;

[0026] Figure 4 A schematic structural diagram of the outward-extending spring piece in the folded state in the first embodiment of the present application;

[0027] Figure 5A schematic structural diagram of the outward-extending spring piece in the first embodiment of the present application in the expanded state;

[0028] Figure 6 A schematic structural diagram of the inner core in the second embodiment of the present application;

[0029] Figure 7 A schematic diagram of the connection of the outward-extending spring piece in the third embodiment of the present application;

[0030] Figure 8 A schematic structural diagram of a cutting knife in the third embodiment of the present application;

[0031] Figure 9 A schematic structural diagram of the inner core in the fourth embodiment of the present application.

[0032] Explanation of reference numerals: 1. Inner sheath cannula; 11. Inner cavity; 12. Outer cavity; 2. Outer sheath cutter; 21. Annular cutting blade; 3. Inner core; 31. Core tube; 311. Hole; 32. Outward shrapnel; 33. Blocking ring; 34. Rivet; 35. Movable rod; 351. Cutter; 36. Spring; 37. Rocker arm; 38. Slide; 39. Connecting rod; 310. Tension spring; 3101. Button shrapnel; 31011. Hook head; 4. Injection device; 5. Venous trunk; 51. Venous branch. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings. The terms used in the implementation methods of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0034] See Figures 1 to 5 The embodiment of the present application provides a great saphenous vein stripping device, comprising an inner sheath cannula 1, an outer sheath cutter 2 and an inner core 3; the middle part of the inner sheath cannula 1 has an inner cavity 11 which is axially connected at both ends and is used to facilitate the passage of the main vein 5; an outer cavity 12 is provided in the body of the inner sheath cannula 1, and the outer cavity 12 is connected to the external injection device 4 so that an anesthetic swelling fluid can be injected into the outer cavity 12, and a plurality of channels are provided in the outer cavity 12, wherein a part of the channels is connected to the inner cavity 11, and another part of the channels is provided at the end of the inner sheath cannula 1 and is connected to the outside; the outer sheath cutter 2 is a tubular structure which can be movably sleeved on the outer periphery of the inner sheath cannula 1, and an annular cutting blade 21 is provided at the end of the outer sheath cutter 2, so that the outer sheath cutter 2 and the inner sheath cannula 1 can sharply cut off the venous branch 51 and the surrounding tissue during the relative movement;

[0035] The inner core 3 includes a core tube 31, an outward expansion component, a blocking component and an excitation component; the core tube 31 is used to pass through the venous trunk 5, and multiple outward expansion components are connected to the end of the core tube 31 in a circumferentially spaced manner. The outward expansion component has a folded state folded onto the inner core 3 and an outward expansion state radially expanded outward. The blocking component is connected to the outward expansion component to keep it in the folded state, and the excitation component can release the outward expansion component to make it enter the outward expansion state from the folded state. When the multiple outward expansion components are expanded, the venous trunk 5 can be radially expanded at the corresponding position so that the outer sheath cutter 2 can cut the position, thereby separating the venous trunk 5.

[0036] This great saphenous vein stripping device features an inner sheath cannula 1 with an inner lumen 11 that allows passage of the main vein 5. An injection device 4 can inject anesthetic tumescent fluid into the inner and outer lumens 12, forming a layer of anesthetic tumescent fluid around the inner sheath cannula 1. An outer sheath cutter 2 is movable relative to the sheath cannula. The outer sheath cutter 2 terminates in a sharp, annular cutting blade 21, facilitating sharp severing of branches and surrounding tissue. An inner core 3 is inserted through the main vein 5 to the desired severing site. The outer extension member, when deployed, acts as an anvil, cooperating with the outer sheath cutter 2 to sever the main vein 5.

[0037] This device requires no color Doppler ultrasound guidance during operation and allows for real-time injection of anesthetic tumescent fluid, facilitating widespread deployment in primary care hospitals without color Doppler ultrasound equipment. The dual-sheath design separates the great saphenous vein trunk 5 from surrounding tissue through the separating action of the anesthetic tumescent fluid and the sharp cutting and stripping action of the outer sheath blade 2. The great saphenous vein trunk 5 is then extracted through the inner sheath, avoiding trunk fractures caused by excessive traction and overstimulation, and improving the success rate of stripping. Furthermore, the unique auxiliary disconnection core 3 enables distal trunk disconnection without the need for a second external incision, resulting in minimally invasive and aesthetically pleasing procedures.

[0038] See also Figure 3-5 As shown, the outward expansion component is an outward expansion spring 32 fixedly arranged on one side of the core tube 31. The outward expansion spring 32 maintains an elastic force to elastically expand. The core tube 31 is formed with a hole 311 at a position corresponding to the outward expansion spring 32. The blocking component is a blocking ring 33 connected to the inner wall of each outward expansion spring 32. The blocking ring 33 is stuck in the core tube 31 to limit the outward expansion of each outward expansion spring 32. The number of the outward expansion spring 32 can be Figure 4 In order to ensure the deformation ability of the outward-extending spring piece 32, if a steel structure is used, the outward-extending spring piece can be bent to a corresponding bending state, and if a plastic material is used, it can be heated to a corresponding bending state and then cooled.

[0039] See also Figure 4 The outward-stretching spring piece 32 and the core tube 31 are integrally formed, mainly by cutting out the outward-stretching spring piece 32 of the corresponding shape from the core tube 31 and leaving one side connected to the core tube 31 .

[0040] See also Figure 3 The excitation component includes a movable rod 35 movably arranged in the core tube 31, and a cutting knife 351 is provided on the outer periphery of the end of the movable rod 35. When the movable rod 35 moves toward the end, the cutting knife 351 can destroy the blocking component, so that the outward spring piece 32 is automatically expanded.

[0041] Figure 6 Another embodiment of the present application is shown, in which the other end of the movable rod 35 extends out of the core tube 31, and a spring 36 is also sleeved on the outer periphery of the movable rod 35 and connected between the core tube 31 and the movable rod 35 for keeping the movable rod 35 in its initial state. Pressing the movable rod 35 forward can move the movable rod 35 toward the end direction.

[0042] In this way, as long as the movable rod 35 is pressed, the blocking component can be destroyed by the cutter 351, and the movable rod 35 can be automatically reset under the drive of the spring 36 when it is released.

[0043] Figure 7 Another embodiment of the present application is shown, in which a rivet 34 is used as a blocking component, and the rivet 34 rivets the automatic end of the outward-extending spring piece 32 to the core tube 31. Figure 8 The movable rod 35 of this embodiment is shown, wherein the cutter 351 on the movable rod 35 is roughly U-shaped, which is convenient for inserting into the rivet 34. The bottom of the U-shape is a cutting edge. When the movable rod 35 is pushed forward, the cutting edge will cut off the rivet 34. The rivet 34 is usually made of plastic material to facilitate destruction.

[0044] Moreover, in this embodiment, the outward-extending spring piece 32 is a secondary-molded structure, and is fixedly adhered to the core tube 31 by glue. However, the invention is not limited thereto, and the outward-extending spring piece 32 and the core tube 31 may also be connected by riveting or bolts.

[0045] Figure 9 Another embodiment of the present invention is shown. The outward expansion component of this embodiment is a swing rod 37, one end of which is hinged to the inner core 3 rod. A sliding sleeve 38 is movably mounted on the outer periphery of the core tube 31. A connecting rod 39 is provided between the sliding sleeve 38 and the swing rod 37. The ends of the connecting rod 39 are respectively hinged to the swing rod 37 and the sliding sleeve 38. When the sliding sleeve 38 moves toward the end, the swing rod 37 unfolds like an umbrella. This embodiment expands through the rotation of the connecting rod 39, rather than using a spring with its own elasticity.

[0046] The triggering component includes a tension spring 310 for driving the sleeve 38 forward, and a button spring 3101 mounted on the core tube 31. The hook 31011 of the button spring 3101 is designed to hook onto the sleeve 38. Pressing the button spring 3101 causes the hook 31011 to rotate and release the sleeve 38, causing it to move forward. This triggering component is similar to an umbrella, but the sleeve 38 is longer and can be constructed in segments. Figure 9 The two sliding sleeves 38 are pulled together by a connecting rope, and can also be connected by a fixed rod, or of course can be an integrated structure.

[0047] In another embodiment, the push rod and the sliding sleeve 38 are directly fixedly connected together, so that the sliding sleeve 38 can be moved by pulling the push rod.

[0048] The following briefly describes the working process and usage of the great saphenous vein stripping device of the above embodiment:

[0049] First, a small incision is made in the groin area to sever the great saphenous vein trunk 5. After the distal end is sutured and tied, the inner sheath cannula 1 is inserted, and the inner cavity 11 is injected with an anesthetic tumescent fluid. After a certain level of injection, the outer sheath is used to cut and advance distally. Through sharp cutting, the great saphenous vein branches 51 are severed from the surrounding tissues; the inner sheath cannula 1 cooperates with the outer sheath cutter 2, injecting the anesthetic tumescent fluid while advancing forward until it reaches the part of the vein trunk 5 to be severed. The suture is cut, and the inner core 3 is inserted through the great saphenous vein trunk 5. When it reaches the part to be severed, the outer extension part of the inner core 3 is unfolded to form an "anvil", which cooperates with the outer sheath cutter 2 to sever the great saphenous vein trunk 5 and remove it, completing the operation.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A great saphenous vein stripping device, characterized by: The invention comprises an inner sheath cannula, an outer sheath cutter and an inner core; the middle part of the inner sheath cannula has an inner cavity which is axially connected at both ends and is used to facilitate the passage of the main vein; the inner sheath cannula is provided with an outer cavity inside the body of the inner sheath cannula, the outer cavity is connected to an external injection device, so that an anesthetic swelling fluid can be injected into the outer cavity; a plurality of channels are provided in the outer cavity, some of which are connected to the inner cavity, and the other channels are provided at the end of the inner sheath cannula and are connected to the outside; the outer sheath cutter is a tubular structure which can be movably sleeved on the outer periphery of the inner sheath cannula, and the end of the outer sheath cutter is provided with an annular cutting edge, so that the outer sheath cutter and the inner sheath cannula can sharply cut off the venous branches and surrounding tissues during the relative movement; The inner core includes a core tube, an outward expansion component, a blocking component and an excitation component; the core tube is used to be inserted into the main vein, and multiple outward expansion components are connected to the end of the core tube in a circumferentially spaced manner. The outward expansion component has a folded state folded onto the inner core and an outward expansion state radially expanded outward. The blocking component is connected to the outward expansion component to keep it in the folded state. The excitation component can release the outward expansion component to make it enter the outward expansion state from the folded state. When multiple outward expansion components are expanded, the main vein can expand radially at the corresponding position so that the outer sheath cutter can cut the position, thereby severing the main vein.

2. The great saphenous vein stripping device according to claim 1, characterized in that: The outward expansion component is an outward expansion spring piece fixedly arranged on one side of the core tube. The outward expansion spring piece maintains an elastic force for elastic outward expansion. The core tube is formed with a hole at a position corresponding to the outward expansion spring piece. The blocking component is a blocking ring connected to the inner wall of each outward expansion spring piece. The blocking ring is stuck in the core tube to limit the outward expansion of each outward expansion spring piece.

3. The great saphenous vein stripping device according to claim 1, characterized in that: The outward expansion component is an outward expansion spring piece fixedly arranged on one side of the core tube, and the outward expansion spring piece maintains elastic force for elastic outward expansion. The blocking component is a rivet connected to the automatic end of the outward expansion spring piece and riveted to the core tube.

4. A great saphenous vein stripping device according to any one of claims 2-3, characterized in that: The fixed connection method of the outward-extending spring piece and the core tube is selected from one of an integral connection, glue fixation, riveting connection and bolt connection.

5. A great saphenous vein stripping device according to any one of claims 2-3, characterized in that: The excitation component includes a movable rod movably arranged in the core tube, and a cutting knife is provided on the outer periphery of the end of the movable rod. When the movable rod moves toward the end, the cutting knife can destroy the blocking component, so that the outward shrapnel is automatically expanded.

6. The great saphenous vein stripping device according to claim 5, characterized in that: The other end of the movable rod extends out of the core tube, and a spring connected between the core tube and the movable rod is sleeved on the outer circumference of the movable rod for keeping the movable rod in its initial state. Pressing the movable rod forward can move the movable rod toward the end.

7. The great saphenous vein stripping device according to claim 1, characterized in that: The outward extension component is a rocker arm with one end hinged to the inner core rod, a sliding sleeve is movably sleeved on the outer periphery of the core tube, a connecting rod is arranged between the sliding sleeve and the rocker arm, and the two ends of the connecting rod are respectively hinged to the rocker arm and the sliding sleeve, so that when the sliding sleeve moves toward the end direction, the rocker arm is unfolded in the form of an umbrella.

8. The great saphenous vein stripping device according to claim 7, characterized in that: The exciting component is a push rod connected to the sliding sleeve.

9. The great saphenous vein stripping device according to claim 7, characterized in that: The excitation component includes a tension spring for driving the slide to move forward and a button spring arranged on the core tube. The hook head of the button spring is used to hook the slide. When the button spring is pressed, the hook head releases the slide in a rotational manner to move it forward.

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