Radiofrequency hemorrhoid ablation needle

Abstract

The utility model provides a radiofrequency hemorrhoid ablation needle, including a handle shell composed of an upper shell and a lower shell, a blade cap installed at the front end of the handle shell, a tail ring installed at the rear end of the handle shell, an electrode located in the handle shell and extending from the blade cap, a circuit board installed in the handle shell, a power cord located in the handle shell and extending from the tail ring, and a button slidably connected to the handle shell and arranged opposite to the circuit board; the two poles of the circuit board and the electrode are respectively connected to the power cord, and pressing the button causes the circuit board to control the electrode to be energized. The radiofrequency hemorrhoid ablation needle of the utility model designs the needle rod of the ablation electrode into an arc structure with an angle of 120°-160°. It has a simple, safe and practical structure, which is convenient for doctors to operate without blocking their sight. A temperature monitoring system is added to the handle to effectively avoid damage to patients caused by unexpected high temperatures.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a radio frequency hemorrhoid ablation needle. Background Art

[0002] In the medical field, radiofrequency ablation technology is widely used, but traditional ablation needles mostly have a handle and a needle shaft that are an "I" structure. When using a disposable notched anoscope for hemorrhoid surgery, holding the ablation needle handle can easily block the doctor's field of vision and cause accidental injury to surrounding tissues, especially when the anal space is narrow and deep surgical operations are performed. Therefore, a new type of hemorrhoid ablation needle is urgently needed to solve these problems and bring real value to clinical practice. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a radiofrequency hemorrhoid ablation needle, which has a simple and reasonable structure, has both tissue ablation and coagulation hemostasis functions, is safe and convenient to use, and has good effects.

[0004] To achieve the above-mentioned purpose, the utility model provides a radiofrequency hemorrhoid ablation needle, including a handle shell composed of an upper shell and a lower shell, a blade cap installed at the front end of the handle shell, a tail ring installed at the rear end of the handle shell, an electrode located in the handle shell and extending from the blade cap, a circuit board installed in the handle shell, a power cord located in the handle shell and extending from the tail ring, and a button slidably connected to the handle shell and arranged opposite to the circuit board; the two poles of the circuit board and the electrode are respectively connected to the power cord, and pressing the button causes the circuit board to control the electrode to be energized.

[0005] Furthermore, the electrode is composed of a needle rod and a needle head, the needle head is a three-edged tip, a transparent nano coating is provided on the outside of the needle rod, a scale is marked on the front end of the needle rod, and a rear end is wrapped and connected in a handle housing with a heat shrink tube.

[0006] Furthermore, the needle rod is located outside the handle housing and is an arc-shaped portion close to the blade cap, and the included angle of the arc-shaped portion is 120°-160°.

[0007] Furthermore, a positioning tube is fixed on the needle rod, and the positioning tube is fixed in the first mounting groove of the upper shell and fixed by insulating glue.

[0008] Preferably, a temperature sensor is connected to the power cable, and the temperature sensor is installed and fixed in the second installation groove of the upper shell and fixed by insulating glue.

[0009] Preferably, the upper shell, lower shell, blade cap, button and tail ring are all made of PE insulating plastic.

[0010] Preferably, the electrode and the positioning tube are made of stainless steel.

[0011] Compared with the prior art, the radiofrequency hemorrhoid ablation needle of the utility model has the following beneficial effects:

[0012] 1. Based on the original ablation electrode, the needle rod of the ablation electrode is designed into an arc structure with an angle of 120°-160°. The structure is simple, safe and practical, which is convenient for doctors to operate without blocking their vision. A temperature monitoring system is added to the handle to effectively avoid damage to patients caused by accidental high temperature.

[0013] 2. The pen-style handle has been solved. The needle shaft is an "I" structure. When using a disposable notch anoscope, the ablation needle handle can easily block the field of view and cause accidental injury to surrounding tissues, especially when the anal space is narrow and deep surgery is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic structural diagram of the radiofrequency hemorrhoid ablation needle of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the electrode of the utility model;

[0017] Figure 3 This is a diagram of the internal structure of the radiofrequency hemorrhoid ablation needle of the present invention.

[0018] In the figure: 1. electrode, 1-1. needle, 1-2. needle rod, 2. positioning tube, 3. upper shell, 4. lower shell, 5. blade cap, 6. circuit board, 7. button, 8. tail ring, 9. temperature sensor, 10. power cord. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See below Figure 1 to Figure 3The radiofrequency hemorrhoid ablation needle of the utility model is described in detail.

[0021] Radiofrequency ablation uses the heat energy generated by radiofrequency waves to destroy tissue cells. Alternating current changes the direction of ions in tissue fluid, thereby generating ion agitation and frictional heating, leading to coagulative necrosis of tissue. The temperature generated by radiofrequency ablation is low (no higher than 100°), so it causes less thermal damage to the anal sphincter. It is safe and convenient to use, has good effects, and a simple and reasonable structure. It also has tissue ablation and coagulation hemostasis functions.

[0022] The radiofrequency hemorrhoid ablation needle of the utility model includes a handle shell composed of an upper shell 3 and a lower shell 4, a blade cap 5 installed at the front end of the handle shell, a tail ring 8 installed at the rear end of the handle shell, an electrode 1 located in the handle shell and extending from the blade cap 5, a circuit board 6 installed in the handle shell, a power cord 10 located in the handle shell and extending from the tail ring 8, and a button 7 slidably connected to the handle shell and arranged opposite to the circuit board 6.

[0023] The two poles of the circuit board 6 and the electrode 1 are respectively connected to the power line 10, and the button 7 is pressed to make the circuit board 6 control the electrode 1 to be energized. When the button 7 is pressed, the circuit board 6 is energized and the ablation needle can be fired. The ablation work is about 5-10 seconds according to the power size set by the host. If the hemorrhoid is too large, it is necessary to press the button again to continue the ablation work until the lesion is ablated. After each hemorrhoid is ablated, the treatment site is cooled with cold wet gauze for about 30 seconds to perform local cooling to prevent damage to the muscle layer.

[0024] In the utility model, the electrode 1 and the positioning tube 2 are made of stainless steel. The electrode 1 is composed of a needle rod 1-2 and a needle head 1-1. The needle head 1-1 of the electrode 1 is a three-edged tip, and the needle tip and the edge are sharp and bright. The needle rod 1-2 is coated with Parylene transparent nano-coating with a thickness of 30um-40um. The front end coating of the needle rod 1-2 is marked with scales, and the rear end is wrapped and connected with a heat shrink tube in the handle housing. The withstand voltage of the nano coating (Parylene) reaches 1500v-2000V. The nano coating has good electrical insulation, corrosion resistance, resistance to organic solvents, antibacterial and anti-oxidation, low resistance, low friction coefficient and biocompatibility.

[0025] like Figure 2As shown, the positioning tube 2 and the needle rod 1-2 of the electrode 1 are welded together and fixed on the upper shell 3 to prevent the electrode 1 from moving forward and backward and rotating left and right. The positioning tube 2 on the electrode 1 is fixed in the space at A of the upper shell 3 (the first mounting groove) and fixed with insulating glue; the electrode 1 and the positioning tube 2 are welded together and connected to the power cord 10. The metal in the handle shell is wrapped with a heat shrink tube and insulated. The temperature sensor 9 is connected to the power cord 10, and the joint is wrapped with a heat shrink tube to prevent leakage. The temperature sensor 9 is fixed in the space at B of the upper shell 3 (the second mounting groove) and fixed with insulating glue to prevent failure caused by vibration.

[0026] The electrode 1, the circuit board 6, the temperature sensor 9 and the power line 10 are connected to form an electric knife circuit.

[0027] The upper shell 3 and the lower shell 4 of the handle housing are packaged by ultrasonic welding, and the blade cap 5 is fixed on the welded upper shell 3 and the lower shell 4. The upper shell 3, the lower shell 4, the blade cap 5, the button 7, and the tail ring 8 are all made of PE insulating plastic.

[0028] like Figure 1 , Figure 3 As shown, the needle rod 1-2 of the electrode 1 is an arc-shaped portion outside the handle housing, close to the blade cap 5, and the included angle of the arc-shaped portion is 120°-160°, preferably 145°.

[0029] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be understood by anyone familiar with the technology within the technical scope disclosed by the present invention should be included in the scope of the present invention.

Claims

1. A radiofrequency hemorrhoid ablation needle, characterized in that: The invention comprises a handle shell composed of an upper shell (3) and a lower shell (4), a blade cap (5) installed at the front end of the handle shell, a tail ring (8) installed at the rear end of the handle shell, an electrode (1) located in the handle shell and extending from the blade cap (5), a circuit board (6) installed in the handle shell, a power cord (10) located in the handle shell and extending from the tail ring (8), and a button (7) slidably connected to the handle shell and arranged opposite to the circuit board (6); The two poles of the circuit board (6) and the electrode (1) are respectively connected to a power line (10), and pressing the button (7) causes the circuit board (6) to control the electrode (1) to be energized.

2. The radiofrequency hemorrhoid ablation needle according to claim 1, characterized in that: The electrode (1) is composed of a needle rod (1-2) and a needle head (1-1); the needle head (1-1) is three-edged; a transparent nano coating is provided on the outside of the needle rod (1-2); a scale is marked on the front end of the needle rod (1-2); and a rear end is wrapped and connected in a handle housing with a heat shrink tube.

3. The radiofrequency hemorrhoid ablation needle according to claim 2, characterized in that: The needle rod (1-2) is located outside the handle housing and is an arc-shaped portion close to the blade cap (5), and the included angle of the arc-shaped portion is 120°-160°.

4. The radiofrequency hemorrhoid ablation needle according to claim 2, characterized in that: A positioning tube (2) is fixed on the needle rod (1-2), and the positioning tube (2) is fixed in a first mounting groove of the upper shell (3) and fixed by insulating glue.

5. The radiofrequency hemorrhoid ablation needle according to claim 1, characterized in that: The power line (10) is connected to a temperature sensor (9), and the temperature sensor (9) is installed and fixed in the second installation groove of the upper shell (3) and fixed by insulating glue.

6. The radiofrequency hemorrhoid ablation needle according to claim 1, characterized in that: The upper shell (3), the lower shell (4), the blade cap (5), the button (7) and the tail ring (8) are all made of PE insulating plastic.

7. The radiofrequency hemorrhoid ablation needle according to claim 1, characterized in that: The electrode (1) and the positioning tube (2) are made of stainless steel.

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