CN205073020U - Radio frequency melts monopole pipe - Google Patents

Abstract

The utility model provides a radio frequency melts monopole pipe, characterized by includes the electrode melts head (10), the PTC thermistor body (20) and inner conductor (30), the electrode melts head (10) and sets up at inner conductor (30) tip, and the electrode melts and is equipped with the PTC thermistor body between head (10) and inner conductor (30), and inner conductor (30) are connected with cable plug subassembly (40). This radio frequency melts monopole pipe and the treatment device who contains this radio frequency melts monopole pipe can carry out the accurate control to melting the temperature through PTC.

Description

A radiofrequency ablation monopolar catheter

technical field

The utility model relates to the technical field of medical radiofrequency ablation, in particular to a radiofrequency ablation monopolar catheter.

Background technique

Minimally invasive ablation is the development trend of the medical industry. Among them, thermal ablation has become the mainstream of ablation treatment because of its definite effect. Thermal ablation mainly includes three types: microwave, laser, and radiofrequency. Each thermal ablation method has its own advantages and disadvantages. These three types of minimally invasive thermal ablation treatment methods are all realized by various ablation electrodes. The ablation electrodes can be roughly divided into hard electrodes and soft electrodes in terms of structure. Vascular interventional therapy mainly relies on soft electrodes (superficial vascular intervention Hard electrodes can be used), such as the treatment of varicose veins, arrhythmia, vascular obstruction and other diseases, while non-vascular interventional therapy mainly relies on direct or indirect puncture with hard electrodes, such as percutaneous puncture ablation for liver cancer, uterine fibroids, lung cancer, Thyroid nodules, etc. (Among them, laser ablation requires catheter guidance for both vascular and non-vascular interventions due to the special structure of the laser fiber). In the field of minimally invasive treatment, catheter ablation electrodes have broad development space, among which radio frequency catheter electrodes have incomparable advantages.

Varicose veins in the legs are painful and unsightly. Varicose veins are the most common disease of the venous system. The main reason for the formation of varicose veins is that maintaining the same posture for a long time rarely changes the accumulation of blood in the lower limbs, and damages the venous valves over time, resulting in excessive venous pressure.

Varicose veins mostly occur on the skin of the lower limbs, red or blue twisted blood vessels like spider webs, earthworms, or hard nodules like tree tumors. The abnormal expansion, swelling and varicose veins occur because the human body does not have a self-repairing membrane mechanism. Varicose veins are an irreversible phenomenon.

The traditional high ligation and extraction of the great saphenous vein and stripping of varicose veins are classic operations for the treatment of varicose veins of the lower extremities. Female patients with beautiful legs are even more afraid of this kind of surgery, which delays their treatment. With the continuous improvement of living standards, some patients, especially young female patients, put forward higher standards for the treatment level, not only requiring the treatment of diseases and preventing complications, but also requiring fewer incisions, small incisions or even no incisions, and postoperative aesthetics Wait.

After the traditional vein stripping or surgical treatment, you need to rest for 3 weeks, and the scars left at the same time are also relatively large; another non-surgical vascular sclerotherapy is to block the varicose veins by injecting radioactive substances, which has a certain effect on the normal body. Damage and the possibility of recurrence of varicose veins.

Radiofrequency ablation of venous closure is a new method for the treatment of varicose veins. It has been carried out in Europe and the United States in recent years, and the effect is satisfactory. At present, multiple multi-center prospective clinical randomized controlled studies have confirmed that radiofrequency closure of venous cavity is safe and effective in the treatment of saphenous varicose veins.

Contents of the invention

The purpose of the utility model is to provide a radiofrequency ablation monopolar catheter.

The technical scheme of the utility model is:

A radiofrequency ablation unipolar catheter, comprising an electrode ablation head 10, a PTC thermistor body 20 and an inner conductor 30, the electrode ablation head 10 is arranged at the end of the inner conductor 30, and an electrode ablation head 10 and the inner conductor 30 are arranged There is a PTC thermistor body, and the inner conductor 30 is connected with the cable plug assembly 40.

The electrode ablation head 10 is a tubular body with a smooth arc-shaped end.

The electrode ablation head 10 is made of medical 304 stainless steel.

The critical temperature of the PTC thermistor body 20 is 80°C to 120°C.

Another radio frequency ablation catheter of the present invention includes an outer conductor 1, a PTC thermistor layer 2, an inner conductor 3, and an insulating catheter 4. The insulating catheter 4 is rod-shaped, and its end is arc-shaped. A cylindrical outer conductor 1 is provided on the surface, a PTC thermistor layer 2 is provided on the inner wall of the outer conductor 1, and an inner cable 7 is provided inside the insulating conduit 4, and the inner cable 7 and the outer conductor 1 pass through the PTC heat inside the insulating conduit 4. The sensitive resistor layer 2 is connected. The connected cable plug assembly 6 is connected to the Y-shaped three-way insulating tube 5 , and the inner cable 7 is connected to the cable plug assembly 6 through the inside of the Y-shaped three-way insulating tube 5 .

The material of the outer conductor 1 is medical 304 stainless steel.

The insulating conduit 4 is made of polytetrafluoroethylene (PTFE) or Teflon.

The beneficial effects of the utility model are:

The radio frequency ablation monopolar catheter of the utility model and the treatment device comprising the radio frequency ablation monopolar catheter have the advantages of convenient use, instant disappearance, little allergy, non-permanent pigmentation, high efficiency, no necrosis, and treatment speed (the course of treatment lasts at most 10-15 minutes) for 300-400 pulses, in a single course of treatment, 80-100cm of varicose veins can be eliminated.

The radiofrequency ablation monopolar catheter of the present utility model and the treatment device comprising the radiofrequency ablation monopolar catheter can be used for various types of varicose (small varicose), the location is comprehensive, and the area (<0.3mm) that cannot be reached by microsclerosis, and can be used for All skin types.

The radio frequency ablation monopolar catheter of the utility model and the treatment device including the radio frequency ablation monopolar catheter can implement precise control on the ablation temperature through the PTC.

The radiofrequency ablation monopolar catheter of the utility model can be used to dredge and expand blood vessels. The radiofrequency ablation unipolar catheter of the present invention is a catheter of three specifications: 3F, 5F and 8F. The radiofrequency energy is transmitted to the two electrodes at the top of the catheter, so that the heat is transferred into the blood vessel.

The radiofrequency ablation monopolar catheter of the present invention can also be used to coagulate tissues in endoscopic or percutaneous operations of the gastrointestinal tract, digestive tract including bile-pancreatic duct, and transmit radiofrequency energy to the electrode at the top of the catheter to heat the surrounding area of the catheter. organization.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

Fig. 2 is a structural schematic diagram of Embodiment 2 of the present utility model.

FIG. 3 is a partially enlarged view of FIG. 2 .

In the figure: 10 is the electrode ablation head, 20 is the PTC thermistor body, 30 is the inner conductor, 1 is the outer conductor, 2 is the PTC thermistor layer, 3 is the inner cable, 4 is the insulating catheter, 5 is Y-shaped Three-way insulating pipe, 6 is a cable plug assembly, and 7 is an inner cable.

detailed description

Below in conjunction with accompanying drawing, the utility model will be further described:

As shown in Figure 1, embodiment one.

A radiofrequency ablation unipolar catheter, comprising an electrode ablation head 10, a PTC thermistor body 20 and an inner conductor 30, the electrode ablation head 10 is arranged at the end of the inner conductor 30, and an electrode ablation head 10 and the inner conductor 30 are arranged There is a PTC thermistor body, and the inner conductor 30 is connected with the cable plug assembly 40.

The electrode ablation head 10 is a tubular body with a smooth arc-shaped end.

The electrode ablation head 10 is made of medical 304 stainless steel.

The critical temperature of the PTC thermistor body 20 is 80°C to 120°C.

As shown in Fig. 2 and Fig. 3, the second embodiment.

Another radio frequency ablation catheter of the present invention includes an outer conductor 1, a PTC thermistor layer 2, an inner conductor 3, and an insulating catheter 4. The insulating catheter 4 is rod-shaped, and its end is arc-shaped. A cylindrical outer conductor 1 is provided on the surface, a PTC thermistor layer 2 is provided on the inner wall of the outer conductor 1, and an inner cable 7 is provided inside the insulating conduit 4, and the inner cable 7 and the outer conductor 1 pass through the PTC heat inside the insulating conduit 4. The sensitive resistor layer 2 is connected. The connected cable plug assembly 6 is connected to the Y-shaped three-way insulating tube 5 , and the inner cable 7 is connected to the cable plug assembly 6 through the inside of the Y-shaped three-way insulating tube 5 .

The material of the outer conductor 1 is medical 304 stainless steel.

The insulating conduit 4 is made of polytetrafluoroethylene (PTFE) or Teflon.

The heat treatment temperature range of the radiofrequency ablation monopolar catheter of the present invention and the treatment device comprising the radiofrequency ablation monopolar catheter is, for example, about 80°C to 120°C, preferably 100°C. In this way, when the tissue is coagulated, the ablation needle is not sticky and does not cause the risk of complications such as re-bleeding.

The radiofrequency ablation treatment mechanism of the utility model is that only the local tissue in a limited range in contact with the emitter electrode is hyperthermic, causing it to be denatured, and the heat is quickly dissipated during the conduction process to the surrounding tissue, preventing the heat from spreading to the deep tissue. During radiofrequency ablation, sufficient local heat acts on the vein wall, causing collagen to shrink and endothelial cells to be exposed, resulting in thickening of the vein wall, contraction of the lumen, rapid organization and formation of fibrous cords, and finally the closure of the vein. Since the temperature is limited to a certain temperature during treatment, burning, coagulation, vaporization and carbonization of tissues are avoided.

The radio frequency therapy of the utility model is to make a small incision on the back side of the knee, and insert the catheter into the vein, and the radio frequency probe attached to the catheter emits energy in the vein to generate heat, so that the vein shrinks and is sealed off. Since varicose veins are caused by backflow of blood in the saphenous vein and its branches, sealing off the vein can relieve symptoms such as leg fatigue, pain, and itching. Patients can resume normal activities immediately after receiving the therapy. Endovascular radiofrequency ablation and closure combined with electrocoagulation in the treatment of varicose veins of the lower extremities is simple, practical, and beautiful, which meets the aesthetic requirements of patients and is favored by female patients.

The above-mentioned embodiment is only to describe the preferred implementation of the present utility model, not to limit the concept and scope of the present utility model. Various modifications and improvements made in the technical solution should fall within the scope of protection of the utility model, and the technical content claimed in the utility model has been fully recorded in the claims.

Claims (4)

1. a radio-frequency (RF) ablation one pole conduit, it is characterized in that comprising electrode ablation head (10), PTC thermistor body (20) and inner wire (30), described electrode ablation head (10) is arranged on inner wire (30) end, be provided with PTC thermistor body between electrode ablation head (10) and inner wire (30), inner wire (30) is connected with cable plug assembly (40).

2. radio-frequency (RF) ablation one pole conduit according to claim 1, it is characterized in that described electrode ablation head (10) is tubular body, its end is smooth circular arc.

3. radio-frequency (RF) ablation one pole conduit according to claim 1, is characterized in that the material of described electrode ablation head (10) is medical 304 stainless steel materials.

4. radio-frequency (RF) ablation one pole conduit according to claim 1, is characterized in that the critical temperature of described PTC thermistor body (20) is 80 DEG C to 120 DEG C.