Laser closed scale marking catheter for varicose veins of lower limbs

Abstract

The utility model discloses a lower limb varicose vein laser closing scale mark catheter, the wall of the catheter is provided with scale marks at equal intervals, the scale marks are made of heat-sensitive materials or fluorescent materials, the near end of the catheter is provided with a cladding tube, the outer end of the cladding tube is connected with a catheter fixer, the catheter fixer is connected with an optical fiber fixer through a short tube, and the optical fiber fixer is connected with an optical fiber. An optical fiber is arranged in the middle of the optical fiber fixator, the near end of the optical fiber is connected with the semiconductor laser, the far end of the optical fiber penetrates through the short tube and the catheter fixator and extends out of the catheter by 1-2 cm, and an injector inlet is obliquely formed in the middle of the short tube. The utility model aims to provide the catheter with the scale marks, which is simple and convenient to operate, can accurately control the position of the catheter, can obviously improve the convenience and safety of an EVLT (Enhanced Virtual Location Transfer) operation, improves the accuracy of the operation, reduces complications and enhances the treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a laser closure scale marking catheter for varicose veins of lower extremities. Background Technique

[0002] Endovenous laser treatment (EVLT) is currently the most popular new minimally invasive method for treating varicose veins. EVLT converts electrical energy into light energy by using a semiconductor laser, and outputs a near-infrared continuous laser beam with a wavelength of 808 nm. The laser beam is introduced into the varicose veins through a fiber optic coupling system, and the hemoglobin absorbs the heat energy generated by the laser, causing an inflammatory reaction in the intima of the vein blood vessels, so as to achieve the purpose of closing the main trunk and its branches of the varicose veins. After the operation, the compression of elastic bandages and elastic stockings can further consolidate the treatment effect.

[0003] During the operation, usually under the guidance and observation of B-ultrasound, a sufficient amount of tumescent fluid is injected around the catheter to achieve the purposes of blood removal, pain relief and prevention of burns. Subsequently, a 5F catheter is introduced, and then a 400um optical fiber is implanted to the high ligation incision. During the operation, in order to better find the indicator light (red) of the laser, the light in the operating room will be appropriately dimmed. During the treatment process, the operator needs to maintain a speed of 0.5 cm / s and at the same time withdraw the optical fiber and the catheter (only when the laser is emitted). If it is found that the red indicator light disappears, the light emission should be immediately stopped, which usually means that the optical fiber has entered the catheter, and the optical fiber should be appropriately withdrawn to expose 1-2 cm outside the catheter. However, since there is no scale line marking on the current catheter, it is difficult to control the length of the optical fiber when it is withdrawn, resulting in the optical fiber often entering the catheter, and the operation is very inconvenient. In order to control the withdrawal speed of the catheter, some doctors mark every 10 cm on the skin surface above the catheter. Such an operation is cumbersome and not conducive to the smooth implementation of the operation. Therefore, it is necessary to develop a catheter with scale line markings that is easy to operate, can accurately control the position of the catheter, can significantly improve the convenience and safety of EVLT surgery, improve the accuracy of the surgery, reduce complications, and enhance the treatment effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a catheter with scale line markings that is easy to operate, can accurately control the position of the catheter, can significantly improve the convenience and safety of EVLT surgery, improve the accuracy of the surgery, reduce complications, and enhance the treatment effect.

[0005] To achieve the above object, the present utility model provides the following technical solution: a laser closure scale marking catheter for varicose veins of the lower extremities. Scale lines are arranged at equal intervals on the tube wall of the catheter. The scale lines are made of thermosensitive material or fluorescent material. A covering tube is arranged at the proximal end of the catheter. The outer end of the covering tube is connected to a catheter fixator. The catheter fixator is connected to an optical fiber fixator through a short tube. An optical fiber is arranged in the middle of the optical fiber fixator. The proximal end of the optical fiber is connected to a semiconductor laser. The distal end of the optical fiber passes through the short tube and the catheter fixator and extends 1-2 cm outside the catheter. A syringe inlet is obliquely arranged in the middle of the short tube.

[0006] Further, the total length of the catheter is 50-80 cm, and the length of the covering tube is 1 / 10 of the total length of the catheter.

[0007] Further, handle sheaths are arranged on both sides of the covering tube. The handle sheaths are bonded or integrally formed with the covering tube.

[0008] Further, the optical fiber fixator, the short tube, the syringe inlet and the catheter fixator are integrally formed.

[0009] The beneficial effects of the present utility model are as follows:

[0010] First, by adding scale line markings on the catheter, the operator can accurately control the insertion and withdrawal lengths of the catheter, avoid the optical fiber from entering the catheter by mistake, and ensure the effectiveness and safety of laser treatment. Second, the scale line markings on the catheter enable the operator to dispense with additional markings on the skin surface, simplify the operation steps, reduce the operation time and the pain of the patient. Third, the scale lines are made of thermosensitive or fluorescent materials. The thermosensitive material will appear with the change of temperature, and the fluorescence can also be clearly seen under weak light or radiation, which helps the operator to accurately observe the position of the catheter during the operation and improve the accuracy and success rate of the operation. Finally, by precisely controlling the positions of the catheter and the optical fiber, the present utility model can reduce complications such as burns caused by improper conduction of laser energy due to the optical fiber entering the catheter by mistake, and improve the safety of the patient. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0012] In the figure: 1 - optical fiber, 2 - optical fiber fixator, 3 - syringe inlet, 4 - short tube, 5 - catheter fixator, 6 - handle sheath, 7 - covering tube, 8 - catheter, 9 - scale line. Detailed Embodiment

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0014] Please refer to Figure 1 , the present utility model provides a technical solution, a laser closure scale marking catheter for varicose veins of the lower extremities. Scale lines 9 are equidistantly arranged on the tube wall of the catheter 8. The scale lines 9 are made of thermosensitive material or fluorescent material. A covering tube 7 is arranged at the proximal end of the catheter 8. The outer end of the covering tube 7 is connected to a catheter fixator 5. The catheter fixator 5 is connected to an optical fiber fixator 2 through a short tube 4. An optical fiber 1 is arranged in the middle of the optical fiber fixator 2. The proximal end of the optical fiber 1 is connected to a semiconductor laser. The distal end of the optical fiber 1 passes through the short tube 4 and the catheter fixator 5 and extends 1-2 cm outside the catheter 8. A syringe inlet 3 is obliquely arranged in the middle of the short tube 4.

[0015] The total length of the catheter 8 is 50-80 cm, and the length of the covering tube 7 is 1 / 10 of the total length of the catheter 8.

[0016] Handle sheaths 6 are arranged on both sides of the covering tube 7. The handle sheaths 6 are bonded or integrally formed with the covering tube 7.

[0017] The optical fiber fixator 2, the short tube 4, the syringe inlet 3 and the catheter fixator 5 are integrally formed.

[0018] By adding scale line markings on the catheter 8, the present utility model enables the operator to accurately control the insertion and withdrawal lengths of the catheter 8, avoids the optical fiber 1 from mistakenly entering the catheter 8, and ensures the effectiveness and safety of laser treatment. During the operation, due to the scale line markings, the operator does not need to make additional markings on the skin surface, simplifies the operation steps, and reduces the operation time and the patient's pain. The present utility model can improve the operation accuracy. Since the scale lines 9 are made of thermosensitive or fluorescent materials, the thermosensitive materials will appear with the change of temperature, and the fluorescence can also be clearly shown under weak light or rays, which helps the operator to accurately observe the position of the catheter during the operation and improve the operation accuracy and success rate. Using this marking catheter can reduce the complications during the operation. The reason is that by accurately controlling the positions of the catheter 8 and the optical fiber 9, the complications such as burns caused by improper conduction of laser energy due to the optical fiber 9 mistakenly entering the catheter 8 can be reduced, and the safety of the patient can be improved.

Claims

1. A laser closure and marking catheter for varicose veins of lower extremities, characterized in that: The tube wall of the catheter (8) is provided with scale marks (9) at equal intervals, the scale marks (9) being made of a thermosensitive material or a fluorescent material. A cladding tube (7) is provided at the proximal end of the catheter (8), the outer end of the cladding tube (7) is connected to a catheter holder (5), the catheter holder (5) is connected to an optical fiber holder (2) via a short tube (4), an optical fiber (1) is provided in the middle of the optical fiber holder (2), the proximal end of the optical fiber (1) is connected to a semiconductor laser, the distal end of the optical fiber (1) passes through the short tube (4) and the catheter holder (5) and extends 1-2 cm outside the catheter (8), and a syringe inlet (3) is provided obliquely in the middle of the short tube (4).

2. The laser closure and marking catheter for varicose veins of lower extremities according to claim 1, characterized in that: The total length of the catheter (8) is 50-80 cm, and the length of the covering tube (7) is 1 / 10 of the total length of the catheter (8).

3. The laser closure and marking catheter for varicose veins of lower extremities according to claim 1, characterized in that: A handle sheath (6) is provided on both sides of the covering tube (7), and the handle sheath (6) and the covering tube (7) are bonded or integrally formed.

4. The laser closure and marking catheter for varicose veins of lower extremities according to claim 1, characterized in that: The optical fiber holder (2), the short tube (4), the syringe inlet (3) and the catheter holder (5) are integrally formed.

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