A cutting burr for percutaneous renal access dilation

Abstract

The utility model discloses a kind of cutter for percutaneous nephrolithotomy, it includes handle and blade, the handle is equipped with hand-held part and guide part, the bottom of the guide part is equipped with linear guide slot of axial through guide part, the linear guide slot can be slidably matched with puncture needle;The hand-held part is tilted and rises from the rear end of the guide part towards the side away from the linear guide slot and gradually extends backwards;The blade is embedded in the front end of the guide part, the blade tip of the blade is located at the end away from the guide part and is acute triangle, the blade edge of the blade is double-side open blade.Using the utility model, cutter can be cut into body along the puncture path of puncture needle, this design makes cutter more accurately carry out channel expansion during operation, while reducing damage to surrounding tissue, improve the safety and effectiveness of percutaneous nephrolithotomy, reduce surgical complications, provide better treatment experience for patients.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a cutting tool for percutaneous renal tract dilation. Background Technology

[0002] Percutaneous nephrolithotomy (PCNL) is a minimally invasive surgical procedure that removes kidney stones by creating a percutaneous renal access route. Traditionally, the access route is dilated using a series of dilators, and before dilation, a scalpel-like instrument is used to widen the incision at the puncture site to facilitate the sequential insertion of the dilators. However, the operation of existing scalpel-like instruments relies heavily on the surgeon's experience, and there are still shortcomings in guidance, incision precision, and compatibility with the dilators, which can easily lead to surgical complications. Therefore, there is an urgent need for a scalpel-like device that can improve dilation precision, reduce tissue damage, and efficiently coordinate with the puncture needle and the outer diameter of the access route dilation. Utility Model Content

[0003] The purpose of this invention is to provide a cutting tool for percutaneous renal tract dilation, aiming to solve the problems of insufficient dilation accuracy, complex operation, and significant tissue damage in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A cutting tool for percutaneous renal tract dilation includes a handle and a blade. The handle has a grip portion and a guide portion. The bottom of the guide portion has a linear guide groove that extends axially through the guide portion and can slide with a puncture needle. The grip portion tilts upward from the rear end of the guide portion toward the side away from the linear guide groove and gradually extends rearward. The blade is embedded in the front end of the guide portion. The tip of the blade is located at the end away from the guide portion and is in the shape of an acute triangle. The blade edge is double-edged.

[0006] As a preferred embodiment of this utility model, the depth of the linear guide groove is greater than or equal to the outer diameter of the puncture needle.

[0007] As a preferred embodiment of this utility model, the part where the guide portion connects to the blade is flat, and its thickness and width gradually decrease from back to front.

[0008] As a preferred embodiment of this utility model, the part where the guide portion connects to the blade is provided with a blade mounting groove.

[0009] In a preferred embodiment of this utility model, the blade mounting groove and the linear guide groove are connected.

[0010] As a preferred embodiment of this utility model, the width of the guide portion is less than or equal to the maximum outer diameter of the channel expansion.

[0011] As a preferred embodiment of this utility model, the width of the blade is greater than the maximum outer diameter of the channel expansion.

[0012] The cutting tool for percutaneous renal tract dilation provided by this utility model has the following advantages compared with the prior art:

[0013] The cutting blade for percutaneous nephrolithotomy (PCNL) of this invention, when used in conjunction with a puncture needle, allows the cutting blade to cut into the body along the puncture path of the needle via a linear guide groove on the guide portion. This design enables the cutting blade to more accurately dilate the nephrolithotomy channel during the procedure, while reducing damage to surrounding tissues, improving the safety and effectiveness of PCNL, reducing surgical complications, and providing patients with a better treatment experience. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0015] Figure 1 This is a schematic diagram of the structure of a cutting tool for percutaneous renal tract dilation provided in an embodiment of this utility model;

[0016] Figure 2 This is a front view of the side where the cutter and puncture needle are connected;

[0017] Figure 3 This is a magnified view of the connection between the cutting blade and the puncture needle.

[0018] Marked in the image:

[0019] 1. Handle; 2. Blade; 11. Hand grip; 12. Guide; 13. Linear guide groove; 14. Blade mounting groove. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Please refer to the following: Figures 1 to 3 The cutting tool for percutaneous renal tract dilation provided in the embodiments of this utility model will now be described.

[0025] like Figures 1 to 3 As shown, the incision knife for percutaneous nephrolithotomy includes a handle 1 and a blade 2. The handle 1 has a grip portion 11 and a guide portion 12. The bottom of the guide portion 12 has a linear guide groove 13 that axially penetrates the guide portion 12, and the linear guide groove 13 slides in cooperation with the puncture needle 3. The grip portion 11 tilts upward from the rear end of the guide portion 12 toward the side away from the linear guide groove 13 and gradually extends backward. The blade 2 is embedded in the front end of the guide portion 12, and the tip of the blade 2 is located at the end away from the guide portion 12 and is an acute-angled triangle. The blade edge of the blade 2 is double-edged. When used with the puncture needle, the linear guide groove 13 on the guide portion 12 allows the incision knife to cut into the body along the puncture path of the puncture needle 3. This design allows the incision knife to more accurately dilate the nephrolithotomy channel during the operation, while reducing damage to surrounding tissues, improving the safety and effectiveness of percutaneous nephrolithotomy, reducing surgical complications, and providing patients with a better treatment experience.

[0026] It can also be understood that the acute-angled triangular blade tip and double-sided blade design allow the incision to expand symmetrically to both sides with the guide axis of the straight guide groove 13 as the center, ensuring the uniformity and precision of the channel expansion and further reducing damage to non-target tissues. In addition, the tilted and raised design of the handle is ergonomic and enhances the operator's stability.

[0027] For example, the depth of the linear guide groove 13 is greater than or equal to the outer diameter of the puncture needle 3 to ensure stable sliding of the puncture needle.

[0028] For example, the portion of the guide portion 12 that connects to the blade 2 is flat, with its thickness and width gradually decreasing from back to front. This design helps to provide better guidance and control during expansion.

[0029] For example, the part of the guide portion 12 that connects to the blade 2 is provided with a blade mounting groove 14 to facilitate blade fixing.

[0030] For example, the blade mounting groove 14 and the linear guide groove 13 are connected so that the blade 2 slides close to the surface of the puncture needle 3, ensuring that the cutting path and the puncture path are completely coincident, and avoiding secondary tissue damage caused by incision deviation.

[0031] For example, the width of the guide portion 12 is less than or equal to the maximum outer diameter of the channel expansion, ensuring a good fit between the cutter and the outer diameter of the channel expansion, which facilitates surgical operations.

[0032] For example, the width of the blade 2 is greater than the maximum outer diameter of the channel expansion, which allows the blade 2 to make a larger incision when cutting into the human body, so as to meet the insertion of the expander and the indwelling sheath and improve the expansion efficiency.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A cutting tool for percutaneous renal canal dilation, characterized in that, The device includes a handle and a blade. The handle has a hand grip and a guide. The bottom of the guide has a linear guide groove that extends axially through the guide and can slide with a puncture needle. The hand grip tilts upwards from the rear end of the guide towards the side away from the linear guide groove and gradually extends backwards. The blade is fitted into the front end of the guide. The tip of the blade is located at the end away from the guide and is in the shape of an acute triangle. The blade edge is double-edged.

2. The incision blade for percutaneous renal canal dilation according to claim 1, characterized in that, The depth of the linear guide groove is greater than or equal to the outer diameter of the puncture needle.

3. The incision blade for percutaneous renal canal dilation according to claim 1, characterized in that, The part where the guide connects to the blade is flat, and its thickness and width gradually decrease from back to front.

4. The incision blade for percutaneous renal canal dilation according to claim 3, characterized in that, The part where the guide connects to the blade is provided with a blade mounting groove.

5. The incision blade for percutaneous renal canal dilation according to claim 4, characterized in that, The blade mounting slot and the linear guide slot are connected.

6. The incision blade for percutaneous renal canal dilation according to claim 1, characterized in that, The width of the guide portion is less than or equal to the maximum outer diameter of the channel expansion.

7. The incision tool for percutaneous renal canal dilation according to claim 6, characterized in that, The width of the blade is greater than the maximum outer diameter of the channel expansion.

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