Varicosity trunk and branch stripping catheter and use method thereof

Abstract

The invention provides a varicosity trunk and branch stripping catheter and a using method thereof, and belongs to the field of medical instruments. The stripping catheter comprises a catheter body which is of a hollow structure; the two locking devices are movably arranged on the tube body and are respectively used for fixing the far end and the near end of a blood vessel section needing to be stripped; and the locking rubber pad is made of soft rubber and is sleeved on the annular bulge in a matching manner. According to the varicosity trunk and branch stripping catheter, the trafficability can be improved, meanwhile, the requirement for any stripped blood vessel length can be met, forward traction and reverse traction of blood vessels are achieved, when subcutaneous strip-shaped dragging occurs during single-direction stripping, reverse traction withdrawing can be conducted at any time, branch separation and ligation are conducted, and the risk of errhysis due to violent dragging is reduced.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a varicose vein trunk and branch stripping catheter and a use method thereof. Background Art

[0002] Varicose veins of the great saphenous vein are a common problem in vascular surgery. The surgical treatment is to ligate and completely extract the varicose veins. The traditional surgical method is to remove the varicose veins through multiple incisions from the thigh root to the inner ankle of the calf. This is very traumatic, painful for the patient, long hospital stay, many scars, and poor cosmetic results.

[0003] To address this problem, Chinese utility model patent CN201642132U under the prior art discloses a great saphenous vein stripper, whose structure includes a coated steel wire, with joints fixed at both ends of the steel wire, and stripping handles connected to the joints. Two intermediate joints for connecting the stripper are also fixed in the middle of the steel wire, and a certain distance is left between the two intermediate joints.

[0004] However, this solution has the following disadvantages: (1) The middle joint is a fixed design and cannot match the different lengths of blood vessels that need to be stripped in real time. (2) This solution does not deal with the design of related branches. The rough stripping design will lead to the violent severing of the branches and increase the risk of bleeding. (3) There are valves in the veins. The steel wire of this solution is roughly inserted into the veins, encountering greater resistance and low passability. Summary of the invention

[0005] The present invention is made to solve the above-mentioned problems, and aims to provide a varicose vein trunk and branch stripping catheter and a method of using the same.

[0006] The present invention provides a varicose vein trunk and branch stripping catheter, which has the following characteristics, including: a tube body, which is a hollow structure, and has a plurality of radial annular protrusions spaced a certain distance apart in the length direction of the tube body; two locking devices, each of which includes a first locking piece and a second locking piece, the first locking piece and the second locking piece are sleeved on the tube body, the first locking piece and the second locking piece are adjustably fixed to each other along the length direction of the tube body, and the two locking devices are respectively used to fix the far and near ends of the blood vessel segment to be stripped; and a locking rubber pad, which is a soft rubber, matchingly sleeved on the annular protrusion, and the axial ends of the locking rubber pad are locked by the first locking piece and the second locking piece together, and when the first locking piece and the second locking piece are locked close to each other, the locking rubber pad is squeezed and deformed in the axial direction so as to be embedded between two adjacent annular protrusions and abut against the tube body, so that the locking device is positioned and fixed on the tube body.

[0007] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following features: wherein the material of the tube body includes polytetrafluoroethylene and / or a flexible metal tube, and the length of the tube body is the length of an adult's lower limb.

[0008] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following feature: the first locking member and the second locking member are adjustably connected to each other in a snap-fit ​​manner.

[0009] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following features: wherein the locking rubber pad is a cylindrical soft rubber gasket having an axial through passage, and the radial outer diameter of the locking rubber pad is r 2 , the radial diameter of the through channel is r 3 The locking rubber pad has a groove around its radial outer circumference, which is called an annular groove. The radial inner diameter of the annular groove is r 4 , r 3 <r 4 <r 2 When the first locking member and the second locking member are locked close to each other, the locking rubber pad is squeezed and deformed in the axial direction, so that the annular groove is squeezed and disappears, thereby increasing the radial outer diameter of the locking rubber pad.

[0010] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following features: wherein the first locking member is cylindrical, and its radial outer diameter is denoted by r 5 One end of the first locking member has a cylindrical protrusion, which is called the matching portion, and the radial outer diameter of the matching portion is called r 6 , the axial height of the matching part is recorded as L 1 The matching portion has an external thread, and the first locking member has a first tube body passage extending therethrough in the axial direction. The radial inner diameter of the first tube body passage is denoted as r. 7 The first locking member has a cylindrical groove on one side of the matching portion, which is called the fitting groove, and the radial inner diameter of the fitting groove is called r. 8 , the axial depth of the fitting groove is recorded as L 2 The second locking member is cylindrical, and its radial outer diameter is denoted as r 9 One end of the second locking member has a cylindrical groove, which is called the rotation groove. The radial inner diameter of the rotation groove is r 6 , the axial depth of the rotation groove is L 3 The rotation groove has an internal thread matching the external thread. The second locking member has a cylindrical protrusion on one side of the rotation groove, which is called the abutment portion. The radial outer diameter of the abutment portion is r 8 , the axial height of the abutment portion is L 4 The second locking member has a second tube body passage extending therethrough in the axial direction, and the radial inner diameter of the second tube body passage is r 10, the radial outer diameter of the annular protrusion is r 1 , r 1 =r 3 =r 7 =r 10 <r 4 <r 8 =r 2 <r 6 <r 5 =r 9 , L 1 <L 2 , L 3 <L 4 The pipe body is provided with a first pipe body channel and a second pipe body channel, the locking rubber pad is sleeved on the annular protrusion and embedded in the fitting groove, the external thread and the internal thread are matched and screwed so that the abutment portion is inserted into the fitting groove and presses the locking rubber pad, so that the locking rubber pad is squeezed and deformed and then embedded between two adjacent annular protrusions and abuts against the pipe body, so that the locking device is positioned and fixed on the pipe body.

[0011] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following feature: when the first locking member and the second locking member are screwed together, the ends facing away from each other are in a bullet shape, thereby improving the passability of the varicose vein trunk and branch stripping catheter in the blood vessel.

[0012] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following features: wherein L 1 >L 3 When the locking device is positioned and fixed on the tube body, the first locking piece, the matching part and the second locking piece together form an annular groove, which is called the vascular fixing groove. The vascular fixing groove is used for fixing the incisions at both ends of the vein to be stripped thereon through vascular sutures.

[0013] The varicose vein trunk and branch stripping catheter provided by the present invention may also have the following features: wherein, the varicose vein trunk and branch stripping catheter also includes: a guide head, which is in the shape of a bullet head and is detachably arranged at one end of the tube body, and has a first channel that passes through and is connected to the tube body, for allowing the liquid introduced into the tube body to flow out so as to flush open the valves of the varicose vein trunk and / or branches; and a syringe matching interface, which is detachably arranged at one end of the tube body and has a second channel that passes through and is connected to the tube body, for allowing the syringe to inject liquid therein.

[0014] The present invention also provides a method for using a varicose vein trunk and branch stripping catheter, which has the following characteristics and is a method for using the varicose vein trunk and branch stripping catheter corresponding to any of the above-mentioned varicose vein trunk and branch stripping catheters, comprising the following steps: S10, making incisions at both ends of the varicose vein trunk or branch of the patient to be operated on; S20, sliding two locking devices on the tube body and fixing them at the desired position through a first locking member and a second locking member, wherein the distance between the two locking devices is equal to the length of the vein to be stripped; S30, guiding the varicose vein trunk and branch stripping catheter through its topmost guide head from the distal end vein incision into the vein to be stripped; S40, connecting a syringe at the syringe matching interface, injecting saline into the tube body, allowing the saline to flow out from the guide head, thereby flushing the valve of the vein during the introduction of the tube body; S50, after the tube body is completely introduced, fixing the incisions at both ends of the vein to be stripped in the respective vascular fixing grooves on the two locking devices through vascular sutures; S60, starting stripping.

[0015] The method for using the varicose vein trunk and branch stripping catheter provided by the present invention may also have the following features: in step S60, when subcutaneous stripping occurs during stripping in a single direction, the tube body may be pulled in the opposite direction and withdrawn at any time to separate and ligate the branches of the vein. If a small branch is not severed and causes stripping resistance, the blood vessel may be re-pulled out in the forward or reverse direction, and after the branch is severed, the stripping may continue without resistance, thereby avoiding pain and bleeding caused by violent stripping.

[0016] Functions and Effects of the Invention

[0017] The varicose vein trunk and branch stripping catheter and its use method involved in the present invention include: a tube body, which is a hollow structure, and the tube body has a plurality of radial annular protrusions spaced a certain distance apart in its length direction; two locking devices, each of which includes a first locking piece and a second locking piece, the first locking piece and the second locking piece are sleeved on the tube body, the first locking piece and the second locking piece are adjustably fixed to each other along the length direction of the tube body, and the two locking devices are respectively used to fix the distal and proximal ends of the blood vessel segment to be stripped; and a locking rubber pad, which is a soft rubber, matchingly sleeved on the annular protrusion, and the axial ends of the locking rubber pad are locked by the first locking piece and the second locking piece together. When the first locking piece and the second locking piece are locked close to each other, the locking rubber pad is squeezed and deformed in the axial direction so as to be embedded between two adjacent annular protrusions and abut against the tube body, thereby positioning and fixing the locking device on the tube body.

[0018] Therefore, the varicose vein trunk and branch stripping catheter of the present invention has the following beneficial effects: (1) The hollow design of the tube body can confirm the position of the catheter and flush the valve by injecting water, thereby improving the permeability. (2) The movable, controllable and fixed locking device on the tube body cooperates with the annular protrusion of the tube body to meet any requirement for stripping the blood vessel length. (3) When the forward and reverse traction of the blood vessel can be achieved at any time, when the subcutaneous strip is pulled in a single direction, the reverse traction can be withdrawn at any time to separate and ligate the branch, thereby reducing the risk of violent traction and bleeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a varicose vein trunk and branch stripping catheter according to an embodiment of the present invention;

[0020] Figure 2 is a longitudinal cross-sectional view of a locking device of a varicose vein trunk and branch stripping catheter according to an embodiment of the present invention;

[0021] Figure 3 is a perspective view of a guide head of an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of an axial cross section of a first locking member of an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Corresponding dimensioning drawing;

[0024] Figure 6 is a schematic structural diagram of an axial cross section of a second locking member of an embodiment of the present invention;

[0025] Figure 7 yes Figure 6 Corresponding dimensioning drawing;

[0026] Figure 8 is a three-dimensional view of a locking rubber pad in an axial longitudinal section according to an embodiment of the present invention;

[0027] Fig. 9 yes Figure 2 Corresponding dimensioning drawing;

[0028] Fig.10 It is a cross-sectional view of the process of the locking device of the varicose vein trunk and branch stripping catheter moving on the tube body and rotating and locking in accordance with an embodiment of the present invention;

[0029] Fig.11 is a perspective view of a syringe matching interface of an embodiment of the present invention;

[0030] Fig.12 It is a flowchart of a method for using a varicose vein trunk and branch stripping catheter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and drawings specifically describe a varicose vein trunk and branch stripping catheter and a method of using the present invention.

[0032] <Example>

[0033] Figure 1 It is a schematic structural diagram of a varicose vein trunk and branch stripping catheter according to an embodiment of the present invention; Figure 2 It is a longitudinal cross-sectional view of the locking device of the varicose vein main trunk and branch stripping catheter according to an embodiment of the present invention.

[0034] like Figure 1 and 2 As shown, this embodiment provides a varicose vein trunk and branch stripping catheter 100, including a tube body 10, a guide head 20, a locking device 30, a locking rubber pad 40 and a syringe matching interface 50.

[0035] The tube body 10 is a hollow structure, and its material includes polytetrafluoroethylene and / or a flexible metal tube, and its length is the length of an adult's lower limbs.

[0036] The tube body 10 has a plurality of radial annular protrusions 10a at a certain distance in the length direction, and the radial outer diameter of the annular protrusions 10a is r 1 .

[0037] Figure 3 is a perspective view of a leader head according to an embodiment of the present invention.

[0038] like Figures 1 to 3 As shown, the guide head 20 is in the shape of a bullet head and is detachably arranged at one end of the tube body 10. It has a first channel 20a that passes through and is connected to the tube body 10, for allowing the liquid entering the tube body 10 to flow out so as to flush the valves of the main trunk and / or branches of varicose veins.

[0039] The locking device 30 includes a first locking member 31 and a second locking member 32 .

[0040] Figure 4 is a schematic structural diagram of an axial cross section of a first locking member of an embodiment of the present invention; Figure 5 yes Figure 4 Corresponding dimensioning drawing.

[0041] like Figures 4-5 As shown, the first locking member 31 is in the shape of a bullet head, and the radial outer diameter of the cylindrical portion is r 5 .

[0042] One end of the first locking member 31 has a cylindrical protrusion, which is called the matching portion 31a. The radial outer diameter of the matching portion 31a is r 6 , the axial height of the matching portion 31a is L 1 , the matching portion 31a has an external thread.

[0043] The first locking member 31 has a first tube body passage 31b extending therethrough in the axial direction. The radial inner diameter of the first tube body passage 31b is r 7 .

[0044] The first locking member 31 has a cylindrical groove on one side of the matching portion 31a, which is called the fitting groove 31c. The radial inner diameter of the fitting groove 31c is r 8 , the axial depth of the fitting groove 31c is L 2 .

[0045] Figure 7 is a schematic structural diagram of an axial cross section of a second locking member of an embodiment of the present invention; Figure 8 yes Figure 7 Corresponding dimensioning drawing.

[0046] like Figure 7 and 8 As shown, the second locking member 32 is in the shape of a bullet head, and the radial outer diameter of the cylindrical portion is r 9 .

[0047] One end of the second locking member 32 has a cylindrical groove, which is called the rotation groove 32a. The radial inner diameter of the rotation groove 32a is r 6 , the axial depth of the rotation groove 32a is L 3 The screw-on groove 32a has an internal thread matching the external thread.

[0048] The second locking member 32 has a cylindrical protrusion on one side of the rotation groove 32a, which is called the abutment portion 32b. The radial outer diameter of the abutment portion 32b is r 8 , the axial height of the abutment portion 32b is L 4 ,

[0049] The second locking member 32 has a second tube body passage 32c extending therethrough in the axial direction. The radial inner diameter of the second tube body passage 32c is r 10 .

[0050] Figure 8 It is a stereoscopic view of a locking rubber pad according to an embodiment of the present invention in an axial longitudinal section.

[0051] like Figure 8 As shown, the locking rubber pad 40 is a cylindrical soft rubber pad having an axial through passage 40a, and the radial outer diameter of the locking rubber pad 40 is r 2 , the radial diameter of the through channel 40a is r3 .

[0052] The locking rubber pad 40 has a groove around its radial outer peripheral side, which is called an annular groove 40b. The radial inner diameter of the annular groove 40b is r 4 ,

[0053] Specifically, in this embodiment, r 1 =r 3 =r 7 =r 10 <r 4 <r 8 =r 2 <r 6 <r 5 =r 9 , L 1 <L 2 , L 3 <L 4 .

[0054] Fig. 9 yes Figure 2 Corresponding dimensioning drawing.

[0055] like Figures 1 to 9 As shown, the tube body 10 passes through the first tube body channel 31b and the second tube body channel 32c, the locking rubber pad 40 is sleeved on the annular protrusion 10a and embedded in the embedding groove 31c, and the external thread and the internal thread are matched and screwed so that the abutment portion 32b is inserted into the embedding groove 31c and presses the locking rubber pad 40.

[0056] Fig.10 It is a cross-sectional view of the process of movement and locking of the locking device of the varicose vein main trunk and branch stripping catheter according to an embodiment of the present invention on the catheter body.

[0057] like Fig.10 As shown, when the first locking member 31 and the second locking member 32 are locked together, the locking rubber pad 40 is squeezed and deformed in the axial direction, so that the annular groove 40b is squeezed and disappears, thereby making the radial outer diameter r of the locking rubber pad 40 2 The locking rubber pad 40 is squeezed and deformed, and then embedded between two adjacent annular protrusions 10 a and abuts against the tube body 10 , so that the locking device 30 is finally positioned and fixed on the tube body 10 .

[0058] like Figure 1 and Fig.10 As shown in the attached figure (3), L 1 >L 3When the locking device 30 is positioned and fixed on the tube body 10, the first locking member 31, the matching portion 31a and the second locking member 32 together form an annular groove, which is called the vascular fixing groove m. The vascular fixing groove m is used for fixing the incisions at both ends of the vein to be stripped thereon through vascular sutures.

[0059] Fig.11 is a perspective view of a syringe mating interface according to an embodiment of the present invention.

[0060] like Fig.11 As shown, the syringe matching interface 50 is detachably disposed at the other end of the tube body 10, and has a second channel 50a that passes through and communicates with the tube body 10, for the syringe to inject liquid therein.

[0061] Fig.12 It is a flowchart of a method for using a varicose vein trunk and branch stripping catheter according to an embodiment of the present invention.

[0062] like Fig.12 As shown, this embodiment also provides a method for using a varicose vein trunk and branch stripping catheter, which is a method for using the varicose vein trunk and branch stripping catheter 100 of this embodiment, and includes the following steps:

[0063] S10, an incision is made at both ends of the main trunk or branches of the varicose vein of the patient to be operated on.

[0064] S20, sliding two locking devices 30 on the tube body 10, and fixing them at the desired position through the first locking member 31 and the second locking member 32, wherein the distance between the two locking devices 30 is equal to the length of the vein to be stripped.

[0065] S30, the varicose vein trunk and branch stripping catheter 100 is introduced into the vein to be stripped from the distal end vein incision under the guidance of the topmost guide head 10 thereof.

[0066] S40, connecting a syringe at the syringe matching interface 50, injecting saline into the tube body 10, so that the saline flows out from the guide head 20, thereby flushing open the valve of the vein during the introduction of the tube body 10.

[0067] S50, after the tube body 10 is completely introduced, the incisions at both ends of the vein to be stripped are fixed in the respective vascular fixing grooves m on the two locking devices 30 by using vascular sutures.

[0068] S60, stripping begins. When stripping in a single direction causes subcutaneous stripping, the tube body 10 can be pulled in the reverse direction and withdrawn at any time to separate and ligate the branches of the vein; if a small branch is not severed and causes stripping resistance, the blood vessel can be re-pulled in the forward or reverse direction, and after the branch is severed, the stripping can continue without resistance, so as to avoid pain and bleeding caused by violent stripping.

[0069] Functions and Effects of the Embodiments

[0070] According to the present embodiment, a varicose vein trunk and branch stripping catheter is provided, which includes: a tube body, which is a hollow structure, and the tube body has a plurality of radial annular protrusions spaced a certain distance apart in its length direction; two locking devices, each of which includes a first locking piece and a second locking piece, the first locking piece and the second locking piece are sleeved on the tube body, the first locking piece and the second locking piece are adjustably fixed to each other along the length direction of the tube body, and the two locking devices are respectively used to fix the distal and proximal ends of the blood vessel segment to be stripped; and a locking rubber pad, which is a soft rubber, matchingly sleeved on the annular protrusion, and the axial ends of the locking rubber pad are locked by the first locking piece and the second locking piece together, and when the first locking piece and the second locking piece are locked close to each other, the locking rubber pad is squeezed and deformed in the axial direction so as to be embedded between two adjacent annular protrusions and abut against the tube body, thereby positioning and fixing the locking device on the tube body.

[0071] Therefore, the varicose vein trunk and branch stripping catheter of this embodiment has the following beneficial effects: (1) The hollow design of the tube body can confirm the position of the catheter and flush the valve by injecting water, thereby improving the permeability. (2) The movable, controllable and fixed locking device on the tube body cooperates with the annular protrusion of the tube body to meet the requirements of any stripping length of the blood vessel. (3) The forward and reverse traction of the blood vessel can be achieved in any case. When the subcutaneous strip is pulled in a single direction, the reverse traction can be withdrawn at any time to separate and ligate the branch, thereby reducing the risk of violent pulling and bleeding.

[0072] Furthermore, the material of the tube body includes polytetrafluoroethylene and / or a flexible metal tube, and the length of the tube body is the length of an adult's lower limb. This arrangement makes the tube body flexible and can cope with different blood vessel bending angles.

[0073] Furthermore, the locking rubber pad is a cylindrical soft rubber gasket having a through passage in the axial direction, and the radial outer diameter of the locking rubber pad is r 2 , the radial diameter of the through channel is r 3 The locking rubber pad has a groove around its radial outer circumference, which is called an annular groove. The radial inner diameter of the annular groove is r 4 , r 3 <r 4 <r 2When the first locking member and the second locking member are locked together, the locking rubber pad is squeezed and deformed in the axial direction, so that the annular groove is squeezed and disappears, thereby increasing the radial outer diameter of the locking rubber pad. In this way, the locking rubber pad can be adjusted and relatively fixed at different positions on the pipe body.

[0074] Furthermore, the first locking member is cylindrical, and its radial outer diameter is denoted as r. 5 One end of the first locking member has a cylindrical protrusion, which is called the matching portion, and the radial outer diameter of the matching portion is called r 6 , the axial height of the matching part is recorded as L 1 The matching portion has an external thread, and the first locking member has a first tube body passage extending therethrough in the axial direction. The radial inner diameter of the first tube body passage is denoted as r. 7 The first locking member has a cylindrical groove on one side of the matching portion, which is called the fitting groove, and the radial inner diameter of the fitting groove is called r. 8 , the axial depth of the fitting groove is recorded as L 2 The second locking member is cylindrical, and its radial outer diameter is denoted as r 9 One end of the second locking member has a cylindrical groove, which is called the rotation groove. The radial inner diameter of the rotation groove is r 6 , the axial depth of the rotation groove is L 3 The rotation groove has an internal thread matching the external thread. The second locking member has a cylindrical protrusion on one side of the rotation groove, which is called the abutment portion. The radial outer diameter of the abutment portion is r 8 , the axial height of the abutment portion is L 4 The second locking member has a second tube body passage extending therethrough in the axial direction, and the radial inner diameter of the second tube body passage is r 10 , the radial outer diameter of the annular protrusion is r 1 , r 1 =r 3 =r 7 =r 10 <r 4 <r 8 =r 2 <r 6 <r 5 =r 9 , L 1 <L 2 , L 3 <L 4The pipe body is provided with a first pipe body channel and a second pipe body channel, the locking rubber pad is sleeved on the annular protrusion and embedded in the fitting groove, the external thread and the internal thread are matched and screwed so that the abutment portion is inserted into the fitting groove and presses the locking rubber pad, so that the locking rubber pad is squeezed and deformed and then embedded between two adjacent annular protrusions and abuts against the pipe body. In this way, the first locking member and the second locking member can cooperate with the locking rubber pad, so as to be adjusted and relatively fixed at different positions on the pipe body.

[0075] Furthermore, when the first locking member and the second locking member are screwed together, the ends of the two members that are separated from each other are in the shape of bullet heads. This arrangement can improve the passability of the varicose vein trunk and branch stripping catheter in the blood vessel.

[0076] Furthermore, L 1 >L 3 When the locking device is positioned and fixed on the tube body, the first locking piece, the matching portion and the second locking piece together form an annular groove. In this way, the incisions at both ends of the vein to be stripped can be fixed thereon by blood vessel sutures.

[0077] Furthermore, the varicose vein trunk and branch stripping catheter also includes: a guide head, which is in the shape of a bullet head and is detachably arranged at one end of the tube body, and has a first channel that passes through and is connected to the tube body, and is used for the liquid introduced into the tube body to flow out so as to flush the valves of the varicose vein trunk and / or branches; and a syringe matching interface, which is detachably arranged at one end of the tube body and has a second channel that passes through and is connected to the tube body, and is used for the syringe to inject liquid therein. Such an arrangement can improve the passability of the varicose vein trunk and branch stripping catheter in the vein.

[0078] A method for using a varicose vein trunk and branch stripping catheter provided in accordance with the present embodiment is a method for using the varicose vein trunk and branch stripping catheter corresponding to any of the aforementioned items, because it includes the following steps: S10, making incisions at both ends of the varicose vein trunk or branch of the patient to be operated on; S20, sliding two locking devices on the tube body and fixing them at the desired position through a first locking member and a second locking member, wherein the distance between the two locking devices is equal to the length of the vein to be stripped; S30, guiding the varicose vein trunk and branch stripping catheter through its topmost guide head from the distal end vein incision into the vein to be stripped; S40, connecting a syringe at the syringe matching interface, injecting saline into the tube body, allowing the saline to flow out from the guide head, thereby flushing the valve of the vein during the introduction of the tube body; S50, after the tube body is completely introduced, fixing the incisions at both ends of the vein to be stripped in the respective vascular fixing grooves on the two locking devices through vascular sutures; S60, starting stripping.

[0079] Therefore, the method of using the varicose vein trunk and branch stripping catheter of this embodiment can improve the catheter's passability while meeting any requirement for stripping the blood vessel length.

[0080] Furthermore, in step S60, when stripping in a single direction causes subcutaneous stripping, the tube body can be pulled in the opposite direction and withdrawn at any time to separate and ligate the branches of the vein; if a small branch is not cut off and causes stripping resistance, the blood vessel can be re-pulled out in the forward or reverse direction, and after the branch is cut off, the stripping can continue without resistance. This arrangement can reduce the risk of pain and bleeding caused by violent pulling.

[0081] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A varicose vein trunk and branch stripping catheter, characterized in that: include: The tube body is a hollow structure, and has a plurality of radial annular protrusions spaced at a certain distance in the length direction of the tube body; Two locking devices, each of which comprises a first locking member and a second locking member, the first locking member and the second locking member are sleeved on the tube body, the first locking member and the second locking member are fixed to each other at an adjustable distance along the length direction of the tube body, and the two locking devices are respectively used to fix the distal and proximal ends of the blood vessel segment to be stripped; and The locking rubber pad is made of soft rubber and is matched with the annular protrusion. The axial ends of the locking rubber pad are locked by the first locking piece and the second locking piece. When the first locking piece and the second locking piece are close to each other and locked, the locking rubber pad is squeezed and deformed along the axial direction so as to be embedded between two adjacent annular protrusions and abut against the tube body, thereby positioning and fixing the locking device on the tube body.

2. The varicose vein trunk and branch stripping catheter according to claim 1, characterized in that: in, The material of the tube body includes polytetrafluoroethylene and / or a flexible metal tube. The length of the tube body is the length of an adult's lower limbs.

3. The varicose vein trunk and branch stripping catheter according to claim 1, characterized in that: in, The first locking member and the second locking member are adjustably connected to each other in a snap-fit ​​manner.

4. The varicose vein trunk and branch stripping catheter according to claim 1, characterized in that: in, The locking rubber pad is a cylindrical soft rubber gasket with a through passage in the axial direction. The radial outer diameter of the locking rubber pad is r2, and the radial diameter of the through passage is r3. The locking rubber pad has a groove around its radial outer peripheral side, which is called an annular groove. The radial inner diameter of the annular groove is r4. r3＜r4＜r2， When the first locking member and the second locking member are locked close to each other, the locking rubber pad is squeezed and deformed in the axial direction, so that the annular groove is squeezed and disappears, thereby increasing the radial outer diameter of the locking rubber pad.

5. The varicose vein trunk and branch stripping catheter according to claim 4, characterized in that: in, The first locking member is cylindrical, and its radial outer diameter is denoted as r5. One end of the first locking member has a cylindrical protrusion, which is denoted as a matching portion. The radial outer diameter of the matching portion is denoted as r6, and the axial height of the matching portion is denoted as L1. The matching portion has an external thread. The first locking member has a first tube body passage extending therethrough in the axial direction, and the radial inner diameter of the first tube body passage is denoted as r7. The first locking member has a cylindrical groove on one side of the matching portion, which is referred to as the fitting groove. The radial inner diameter of the fitting groove is referred to as r8, and the axial depth of the fitting groove is referred to as L2. The second locking member is cylindrical, and its radial outer diameter is denoted as r9. One end of the second locking member has a cylindrical groove, which is called a rotation groove. The radial inner diameter of the rotation groove is r6, the axial depth of the rotation groove is L3, and the rotation groove has an internal thread matching the external thread. The second locking member has a cylindrical protrusion on one side of the rotation groove, which is called an abutment portion. The radial outer diameter of the abutment portion is r8, and the axial height of the abutment portion is L4. The second locking member has a second tube body passage extending therethrough in the axial direction, and the radial inner diameter of the second tube body passage is r 10 , The radial outer diameter of the annular protrusion is r1, <h2 style=";text-align:left;direction:ltr">r1, r3, r7, r<h2 style=";text-align:left;direction:ltr"> 10 <h2 style=";text-align:left;direction:ltr"> <r4<r8=r2<r6<r5=r9,L1<L2,L3<L4, The pipe body is passed through the first pipe body channel and the second pipe body channel, the locking rubber pad is sleeved on the annular protrusion and embedded in the embedding groove, the external thread and the internal thread are matched and screwed together so that the abutment portion is inserted into the embedding groove and presses the locking rubber pad, so that the locking rubber pad is squeezed and deformed and then embedded between two adjacent annular protrusions and abuts against the pipe body, so that the locking device is positioned and fixed on the pipe body.

6. The varicose vein trunk and branch stripping catheter according to claim 5, characterized in that: in, When the first locking member and the second locking member are screwed together, the ends facing away from each other are in a bullet shape, thereby improving the passability of the varicose vein trunk and branch stripping catheter in the blood vessel.

7. The varicose vein trunk and branch stripping catheter according to claim 5, characterized in that: in, L1>L3, when the locking device is positioned and fixed on the tube body, the first locking member, the matching portion and the second locking member together form an annular groove, which is called the blood vessel fixing groove. The blood vessel fixing groove is used for fixing the incisions at both ends of the vein to be stripped thereon by means of blood vessel sutures.

8. The varicose vein trunk and branch stripping catheter according to claim 1, Features: in, The varicose vein trunk and branch stripping catheter also includes: The guide head is in the shape of a bullet head and is detachably arranged at one end of the tube body. It has a first passage that passes through and is in communication with the tube body and is used for allowing the liquid introduced into the tube body to flow out so as to flush open the valves of the main trunk and / or branches of varicose veins. and The syringe matching interface is detachably arranged at one end of the tube body and has a second channel that passes through and communicates with the tube body, and is used for the syringe to inject liquid therein.

9. A method for using a varicose vein trunk and branch stripping catheter, characterized in that: The method for using the varicose vein trunk and branch stripping catheter according to any one of claims 1 to 8 comprises the following steps: S10, incisions are made at both ends of the main trunk or branches of the varicose veins of the patient to be operated on; S20, sliding two locking devices on the tube body and fixing them at a desired position through the first locking member and the second locking member, wherein the distance between the two locking devices is equal to the length of the vein to be stripped; S30, the varicose vein trunk and branch stripping catheter is introduced into the vein to be stripped from the distal end vein incision under the guidance of the topmost guide head thereof; S40, connecting a syringe to the syringe matching interface, injecting saline into the tube body, so that the saline flows out from the guide head, thereby flushing open the valve of the vein during the introduction of the tube body; S50, after the tube body is completely introduced, the incisions at both ends of the vein to be stripped are fixed in the respective vascular fixing grooves on the two locking devices by using vascular sutures; S60, start peeling.

10. The method for using the varicose vein trunk and branch stripping catheter according to claim 9, characterized in that: in, In step S60, when stripping in a single direction causes subcutaneous stripping, the tube body is pulled in the opposite direction and withdrawn at any time to separate and ligate the branches of the vein. If a small branch is not severed and causes resistance to stripping, the blood vessel can be re-pulled out in either the forward or reverse direction. After the branch is severed, continue to perform inward-inversion stripping without resistance to avoid pain and bleeding caused by violent stripping.

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