Tissue incision device

Abstract

The utility model discloses a tissue incision device which comprises a handle, a catheter and a cutting body, the handle, the catheter and the cutting body are fixedly connected in sequence, a button is installed at the upper end of the handle, an electrode plug is arranged at the lower end of the handle, a protective sleeve is arranged at the front end of the catheter through a telescopic assembly, and the protective sleeve is connected with the handle. Two guide wire holes penetrating through the protective sleeve are formed in the protective sleeve, guide wires can penetrate through the guide wire holes, and the cutting body can enter tissue along the guide wires penetrating through the guide wire holes to conduct precise cutting.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a tissue cutting device. Background Art

[0002] At present, with the rapid advancement of endoscopic technology, humans have been able to accurately operate on target tissues in natural cavities such as the digestive tract, bile duct, and respiratory tract by relying on visualization, which has greatly improved the accuracy and safety of medical intervention. However, when faced with specific complex situations, such as treating fibrotic duodenal papillae, existing tools such as sphincterotomies have successfully guided the guide wire into the patient, but due to the limitations of the blade design, it is difficult to penetrate and effectively cut or expand this narrow area. This technical bottleneck directly leads to the difficulty of subsequent treatment devices to penetrate into the predetermined treatment area, thereby significantly increasing the difficulty and challenge of surgical operations.

[0003] After searching, it was found that the Chinese utility model patent with announcement number CN206473393U discloses an endoscopic tissue cutting device, including a rotatable cutting wire, a control part and a shell. The shell is provided with a partition inside, which is used to place the cutting wire and the conductive mechanism respectively. A rotation limiting mechanism is specially provided to prevent the cutting wire from excessive rotation and breakage, thereby improving the safety of the operation. However, the device does not take into account the problem that the blade is difficult to enter the narrow part of the fibrosis, and there are great limitations in its use, which is not conducive to coping with complex minimally invasive surgery. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide a tissue cutting device with a guide wire hole. The cutting body can enter the tissue along the guide wire passing through the guide wire hole to perform precise cutting.

[0005] In order to solve the above technical problems, the technical solution of the utility model is a tissue cutting device, including a handle, a catheter and a cutting body, the handle, the catheter and the cutting body are fixedly connected in sequence, a button is installed at the upper end of the handle, an electrode plug is arranged at the lower end of the handle, a protective cover is arranged at the front end of the catheter through a telescopic component, two guide wire holes are arranged inside the protective cover that penetrate the catheter, the guide wire holes are suitable for passing the guide wire, the cutting body is connected to the electrode plug through an electrical circuit, and the button is arranged on the electrical circuit.

[0006] Furthermore, one end of the cutting body is connected to an electric wire, the electric wire is located inside the catheter, one end of the electric wire is connected to the button, and the button is electrically connected to the electrode plug.

[0007] Further, the telescopic assembly includes a fixed sleeve fixedly connected to the outer peripheral surface of the catheter. A cavity is formed inside the fixed sleeve, and a telescopic spring is arranged inside the cavity. One end of the telescopic spring is connected to the inner wall of the cavity, and the other end of the telescopic spring is connected to a telescopic sleeve. One end of the telescopic sleeve is fixedly connected to the protective sleeve, and the protective sleeve is adapted to surround the periphery of the cutting body without contacting the cutting body.

[0008] Further, the telescopic sleeve includes a limiting ring, and a fixing ring is arranged at the front end of the fixed sleeve. The limiting ring is adapted to abut against the fixing ring. A groove is formed at the position where the limiting ring abuts against the fixing ring, and a sealing ring is nested inside the groove.

[0009] Further, water outlet holes that are interconnected and penetrate through themselves are formed inside the protective sleeve, the telescopic sleeve, and the fixed sleeve.

[0010] Further, a regulating water pipe is arranged inside the fixed sleeve. The regulating water pipe passes through the water outlet hole inside the fixed sleeve. One end of the regulating water pipe is fixedly connected to one side of the telescopic sleeve. The regulating water pipe covers the water outlet hole on the telescopic sleeve. The regulating water pipe is hollow, and the inside of the regulating water pipe communicates with the water outlet hole.

[0011] Further, a positive electromagnet is arranged on the part of the regulating water pipe extending out of the fixed sleeve, and a negative electromagnet is arranged on the handle. The negative electromagnet and the positive electromagnet are magnetically attracted to fix the regulating water pipe.

[0012] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0013] 1. After threading the guide wire through the guide wire hole on the protective sleeve, the whole tissue cutting device moves along the direction of the guide wire to achieve precise cutting.

[0014] 2. The front end of the protective sleeve adopts an arc-shaped structure, which can reduce the resistance inside the tissue, reduce the friction with the tissue, and protect the tissue. At the same time, as a physical barrier, it reduces the direct contact between the cutting head and the surrounding environment, thereby reducing the risk of infection.

[0015] 3. During the operation, the exposed cutting head may accidentally injure the tissue in the non-operative area due to improper operation. The telescopic protective sleeve can adjust the exposed length of the cutting head as needed, thereby reducing the risk of such improper operation.

[0016] 4. During the operation, especially during fine operations, the telescopic protective sleeve can cover part of the cutting head to prevent it from directly contacting the non-target tissue, thereby playing a protective role.

[0017] 5. During the cutting process, certain thermal damage will be generated. By adjusting the exposed length of the cutting head, the doctor can control the scope of thermal damage and reduce the collateral damage to non-target tissues.

[0018] 6. Through the setting of the water outlet holes, water can be injected through the water pipe during the operation to clean the area where the doctor needs to operate, thereby making the field of view clearer and improving the accuracy of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 of the present utility model Figure 1 is an enlarged view of part A;

[0021] Figure 3 is a schematic diagram of the overall structure of the protective sleeve of the present utility model;

[0022] Figure 4 is a front view of the internal structure of the protective sleeve of the present utility model;

[0023] Figure 5 is a rear view of the internal structure of the protective sleeve of the present utility model;

[0024] Figure 6 of the present utility model Figure 5 is an enlarged view of part B.

[0025] In the figure: 1. Handle; 2. Button; 3. Electrode plug; 4. Catheter; 5. Protective sleeve; 6. Cutting body; 7. Adjusting water pipe; 8. Positive electromagnet; 9. Negative electromagnet; 10. Fixed sleeve; 11. Telescopic sleeve; 12. Guide wire hole; 13. Water outlet hole; 14. Telescopic spring; 15. Limit ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments in conjunction with the accompanying drawings.

[0027] Embodiment 1

[0028] As Figures 1-3 shown, a tissue cutting device includes a handle 1, a catheter 4 and a cutting body 6. The handle 1, the catheter 4 and the cutting body 6 are fixedly connected in sequence. A button 2 is installed at the upper end of the handle 1, an electrode plug 3 is arranged at the lower end of the handle 1, the front end of the catheter 4 is provided with a protective sleeve 5 through a telescopic assembly. Two guide wire holes 12 penetrating through itself are opened inside the protective sleeve 5. The guide wire holes 12 are adapted to pass through guide wires. The cutting body 6 is electrically connected to the electrode plug 3 through an electrical circuit, and the button 2 is arranged on the electrical circuit.

[0029] As Figure 1 shown, one end of the cutting body 6 is connected with a wire, the wire is located inside the conduit 4, one end of the wire is connected with the button 2, and the button 2 is electrically connected with the electrode plug 3.

[0030] As Figures 4-6 shown, the telescopic assembly includes a fixed sleeve 10 which is fixedly connected to the outer peripheral surface of the conduit 4. A cavity is formed inside the fixed sleeve 10. A telescopic spring 14 is arranged inside the cavity. One end of the telescopic spring 14 is connected to the inner wall of the cavity, and the other end of the telescopic spring 14 is connected with a telescopic sleeve 11. One end of the telescopic sleeve 11 is fixedly connected to the protective sleeve 5. The protective sleeve 5 is adapted to surround the cutting body 6 and is not in contact with the cutting body 6.

[0031] As Figures 3-6 shown, the telescopic sleeve 11 includes a limiting ring 15. A fixing ring is provided at the front end of the fixed sleeve 10. The limiting ring 15 is adapted to abut against the fixing ring. A groove is formed at the portion where the limiting ring 15 abuts against the fixing ring, and a sealing ring is nested inside the groove.

[0032] The working principle of this embodiment is as follows: When in use, the operator holds the handle and presses the button 2 to energize the internal wire. At this time, the cutting body 6 can be used for cutting and electrocoagulation. This part belongs to the prior art and will not be elaborated here.

[0033] First, insert the guide wire into the part to be incised, and then pass the guide wire hole 12 on the protective sleeve 5 through the guide wire. At this time, the tissue cutting device can be advanced forward along the direction of the guide wire to enter the tissue for precise cutting. It should be noted that two symmetrical guide wire holes 12 are formed inside the protective sleeve 5, and can be selected according to the actual situation during actual use.

[0034] During the advancement of the tissue cutting device, due to the forward acting force of the telescopic spring 14, the protective sleeve 5 is at the limit position of extension and can cover the entire cutting body 6. The front end of the protective sleeve 5 is arranged in an arc shape, which is more conducive to entering the tissue and protecting the tissue in the non-surgical area. The function of the limiting ring 15 is to abut against the inner wall of the fixing ring when the protective sleeve 5 is at the limit position of extension to play a limiting role.

[0035] After reaching the area where surgery is required, press the button 2. The cutting body 6 is energized and heated to cut the tissue. At this time, the protective sleeve 5 needs to be retracted backward so that the cutting sleeve is exposed for cutting work.

[0036] Embodiment Two

[0037] As Figures 3-5As shown in the figure, on the basis of the first embodiment, this embodiment further includes the following structures: the protective sleeve 5, the telescopic sleeve 11, and the fixing sleeve 10 are internally provided with water outlet holes 13 that communicate with each other and penetrate through themselves.

[0038] As Figures 3-5 shown, an adjusting water pipe 7 is arranged inside the fixing sleeve 10. The adjusting water pipe 7 passes through the water outlet hole 13 inside the fixing sleeve 10. One end of the adjusting water pipe 7 is fixedly connected to one side of the telescopic sleeve 11. The adjusting water pipe 7 covers the water outlet hole 13 on the telescopic sleeve 11. The adjusting water pipe 7 is hollow, and the inside of the adjusting water pipe 7 communicates with the water outlet hole 13.

[0039] As Figures 3-5 shown, a positive electromagnet 8 is arranged on the part of the adjusting water pipe 7 extending out of the fixing sleeve 10, and a negative electromagnet 9 is arranged on the handle 1. The negative electromagnet 9 and the positive electromagnet 8 are attracted to each other magnetically to fix the adjusting water pipe 7.

[0040] The working principle of this embodiment is as follows: Before cutting, when the protective sleeve 5 still covers the cutting body 6, water can be injected into the hollow adjusting water pipe 7, and the water is sprayed along the water outlet hole 13 on the area that needs surgery, which can wash the surgical area clean, making the doctor's vision clearer, thereby improving the precision of the surgery.

[0041] When the protective sleeve 5 needs to be retracted backward, the adjusting water pipe 7 can be pulled. The adjusting water pipe 7 drives the telescopic sleeve 11 to move backward, and at the same time drives the entire protective sleeve 5 to move backward. During this process, the telescopic spring 14 will be compressed.

[0042] Manually, the length of the cutting body 6 exposed outside can be controlled. The doctor can control the range of thermal damage and reduce the secondary damage to non-target tissues. When the cutting body 6 needs to be completely exposed, only need to pull the adjusting water pipe 7 to the maximum value. At the maximum value, the positive electromagnet 8 and the negative electromagnet 9 will attract each other, achieving the effect of fixing the position of the protective sleeve 5. After the surgery is completed, if the mutual attraction of the two electromagnets is released and no force is applied to the adjusting water pipe 7 anymore, the protective sleeve 5 will reset under the reaction force of the telescopic spring 14 and continue to cover the cutting body 6.

[0043] In the above-mentioned specific embodiments, the technical problems solved, technical solutions, and beneficial effects of the present invention are further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tissue cutting device, comprising a handle (1), a catheter (4) and a cutting body (6), wherein the handle (1), the catheter (4) and the cutting body (6) are fixedly connected in sequence, a button (2) is installed at the upper end of the handle (1), and an electrode plug (3) is provided at the lower end of the handle (1), characterized in that: The front end of the catheter (4) is provided with a protective sleeve (5) through a telescopic component, and the interior of the protective sleeve (5) is provided with two guide wire holes (12) penetrating the protective sleeve, and the guide wire holes (12) are suitable for passing a guide wire, and the cutting body (6) is connected to the electrode plug (3) through an electrical circuit, and the button (2) is arranged on the electrical circuit.

2. The tissue cutting device according to claim 1, characterized in that: One end of the cutting body (6) is connected to an electric wire, the electric wire is located inside the catheter (4), one end of the electric wire is connected to the button (2), and the button (2) is electrically connected to the electrode plug (3).

3. The tissue cutting device according to claim 1, characterized in that: The telescopic assembly comprises a fixing sleeve (10), the fixing sleeve (10) being fixedly connected to the outer peripheral surface of the catheter (4), the fixing sleeve (10) being provided with a cavity inside, a telescopic spring (14) being arranged inside the cavity, one end of the telescopic spring (14) being connected to the inner wall of the cavity, the other end of the telescopic spring (14) being connected to the telescopic sleeve (11), one end of the telescopic sleeve (11) being fixedly connected to the protective sleeve (5), the protective sleeve (5) being suitable for encircling the periphery of the cutting body (6) and not contacting the cutting body (6).

4. The tissue cutting device according to claim 3, characterized in that: The telescopic sleeve (11) comprises a limiting ring (15), a fixing ring is provided at the front end of the fixing sleeve (10), the limiting ring (15) is suitable for abutting against the fixing ring, the limiting ring (15) is provided with a groove at the position abutting against the fixing ring, and a sealing ring is embedded in the groove.

5. The tissue cutting device according to claim 4, characterized in that: The protective sleeve (5), the telescopic sleeve (11) and the fixed sleeve (10) are provided with water outlet holes (13) which are interconnected and penetrate through the sleeves.

6. The tissue cutting device according to claim 5, characterized in that: An adjusting water pipe (7) is arranged inside the fixed sleeve (10), the adjusting water pipe (7) passes through a water outlet hole (13) inside the fixed sleeve (10), one end of the adjusting water pipe (7) is fixedly connected to one side of the telescopic sleeve (11), the adjusting water pipe (7) covers the water outlet hole (13) on the telescopic sleeve (11), the adjusting water pipe (7) is hollow, and the inside of the adjusting water pipe (7) is in communication with the water outlet hole (13).

7. The tissue cutting device according to claim 6, characterized in that: A positive magnet (8) is arranged on the portion of the regulating water pipe (7) extending out of the fixing sleeve (10), and a negative magnet (9) is arranged on the handle (1). The negative magnet (9) and the positive magnet (8) are attracted to each other magnetically to fix the regulating water pipe (7).

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