Medical rotary cutting assembly

Abstract

The utility model provides a medical rotary cutting assembly, and belongs to the technical field of medical instruments. The assembly comprises a base, a guide tube and a blade. Wherein a suction channel for thrombus to pass through is arranged; the guide tube is fixed on the base and is coaxial with the base, and guide parts are arranged at the two ends of the guide tube and are used for guiding a guide wire to penetrate through and be pulled away; the blade is obliquely erected on the base and extends to the outer surface of the guide pipe. Thrombus can be discharged through the suction channel provided by the utility model, so that the situation that the thrombus is adhered to the blade is effectively avoided; meanwhile, the guide part is provided, so that the guide wire can conveniently penetrate through the guide tube and be conveniently pulled out of the guide tube, and the installation difficulty of the guide wire is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and more specifically relates to a medical rotary cutting component. Background Art

[0002] Medical device technology is a field of science and technology that focuses on the development and application of various specialized equipment and tools to support healthcare services and medical research. This field covers a wide range from the most basic surgical instruments to complex medical imaging equipment. Medical device technology not only includes the design and manufacture of equipment, but also involves their use, maintenance and continuous improvement to ensure the safety, effectiveness and efficiency of medical operations. Among them, surgical instruments are an important part of medical device technology and are used in various surgical operations. These instruments include tools such as rotary cutters, scissors, forceps, syringes, clavicle clamps, etc., each of which is designed for specific surgical tasks such as cutting tissue, sampling, suturing and clamping. Rotary cutters are usually used for precise skin incisions, tissue cutting, thrombectomy, etc., while scissors are used to cut and remove tissues. Forceps and clavicle clamps are used to clamp blood vessels or organs to control bleeding or protect surrounding tissues. Syringes are used to deliver drugs or extract samples.

[0003] Regarding the rotary cutter used for thrombus removal, the prior art discloses an invention patent named "A Thrombus Rotary Cutting Catheter", and its publication number is: CN116549065A. The main structure of the rotary cutter involved in the patent includes structures such as a blade platform, a blade, and a top hole. In the actual operation of those skilled in the art, it is found that since the blade is embedded in the blade positioning port on the blade platform, during the process of removing the thrombus, the broken thrombus is easily stuck between the blade positioning port and the blade, so that the thrombus accumulates near the blade, and the thrombus sticks to the blade, affecting the entire removal process. At the same time, since the top hole of the above structure is a flat-mouth structure, the flat mouth of the top hole is easy to collide with the guide wire when installing the guide wire, making it difficult to smoothly guide the guide wire into the top hole, causing certain difficulties in the installation process of the device. Utility Model Content

[0004] The main purpose of the present application is to provide a medical rotary cutting assembly, which provides a suction channel to allow the thrombus to be discharged through the suction channel, effectively preventing the thrombus from sticking to the blade; at the same time, a guide part is provided to facilitate guiding the guide wire through the guide tube and guiding the guide wire out of the guide tube, thereby reducing the difficulty of installing the guide wire.

[0005] In order to achieve the above objectives, the present application proposes a medical rotary cutting assembly, comprising:

[0006] a base having an aspiration channel for passing a thrombus;

[0007] A guide tube is fixed on the base and is coaxially arranged with the base. Both ends of the guide tube are provided with guide parts for guiding the passage and withdrawal of the guide wire.

[0008] The blade is obliquely mounted on the base, and the blade extends to the outer surface of the guide tube.

[0009] Furthermore, the guide portion comprises:

[0010] a first guide portion, the inner diameter of which gradually decreases toward the blade;

[0011] a second guide portion, the inner diameter of which gradually increases toward the blade;

[0012] The first guide portion and the second guide portion are coaxially arranged opposite to each other.

[0013] Furthermore, the base comprises:

[0014] Ring parts;

[0015] A plurality of supporting ribs are fixed to the inner wall of the annular member and extend to the outer surface of the guide tube. The suction channel is formed between the inner space of the annular member, the supporting ribs and the guide tube.

[0016] Further, the blade is fixed on the supporting edge and / or the guide tube.

[0017] Furthermore, the blade edge of the blade is inclined toward the thrombus, and the angle between the blade and the end surface of the base is 15° to 30°.

[0018] Further, when the base rotates, the rotation radius of the base is greater than or equal to the rotation radius of the blade.

[0019] Furthermore, the area formed by the suction channel is a fan-shaped area.

[0020] Furthermore, a connecting ring is sleeved on the base along the rotation direction of the base, and the connecting ring is rotatably connected to the base.

[0021] The medical rotary cutting assembly proposed by the utility model has the following beneficial effects:

[0022] The utility model provides a suction channel so that the thrombus can be discharged through the suction channel, effectively preventing the thrombus from sticking to the blade; at the same time, a guide part is provided to facilitate guiding the guide wire through the guide tube and guiding the guide wire out of the guide tube, thereby reducing the difficulty of installing the guide wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the medical rotary cutting assembly of the utility model;

[0024] Figure 2It is a cross-sectional schematic diagram of the guide tube of the utility model;

[0025] Figure 3 This is a positional relationship diagram of the connecting ring and the catheter of the utility model.

[0026] In the figure, 1, base, 11, ring member, 12, supporting edge, 2, guide tube, 21, first guide part, 22, second guide part, 3, blade, 4, slip ring, 5, connecting ring, 6, catheter. DETAILED DESCRIPTION

[0027] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0028] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0029] Example

[0030] In the prior art, since the blade is embedded in the blade positioning opening on the blade platform, during the process of removing the thrombus, the broken thrombus is easily stuck between the blade positioning opening and the blade, so that the thrombus accumulates near the blade, and the thrombus sticks to the blade, affecting the entire removal process. At the same time, since the top hole of the above structure is a flat-mouth structure, the flat mouth of the top hole is easy to collide with the guide wire when installing the guide wire, making it difficult to smoothly guide the guide wire into the top hole, causing certain difficulties in the installation process of the device.

[0031] Based on this, in order to solve the technical problems that the broken thrombus is easily stuck between the blade positioning port and the blade, so that the thrombus accumulates near the blade, the thrombus sticks to the blade, and it is difficult to smoothly guide the guide wire into the top hole, this embodiment provides a medical rotary cutting assembly, referring to Figure 1, including: a base 1, a guide tube 2 and a blade 3. Among them, the base 1 includes an annular member 11, and a plurality of supporting edges 12 are radiated along the center position of the base 1 on the inner wall of the base 1, and the plurality of supporting edges 12 gather toward the center position of the base 1. The guide tube 2 is arranged in the center position of the base 1, and the planes formed by the two ends of the guide tube 2 are respectively in the same plane as the two ends of the base 1. At this time, the inner surface of the annular member 11, the supporting edges 12 and the outer surface of the guide tube 2 constitute a suction channel for passing a thrombus. Guide parts are respectively provided at both ends of the guide tube 2, one of which is used to guide the guide wire to pass through the guide tube 2, and the other guide part is used to guide the guide wire to be withdrawn from the guide tube 2. The blade 3 is obliquely mounted on the base 1, and the blade 3 extends to the outer surface of the guide tube 2. In this embodiment, the suction channel is provided to allow the thrombus to be discharged through the suction channel, effectively preventing the thrombus from adhering to the blade 3; at the same time, a guide portion is provided to facilitate guiding the guide wire through the guide tube 2 and guiding the guide wire to be withdrawn from the guide tube 2, thereby reducing the difficulty of installing the guide wire. The blade 3 is inclined with respect to the base 1, so that when the rotary cutting assembly is rotary cutting the thrombus, the blade 3 can first contact the thrombus, so that the thrombus can be directly cut by the blade 3.

[0032] It should be noted that in actual use scenarios, the medical exfoliation assembly referred to in this embodiment is in a catheter, the guide tube 2 is used to insert the guide wire, and the base 1 can be driven from the outside by a driving rod, and is placed in the catheter under the drive of the driving rod, and can rotate and exfoliate the thrombus in the catheter. The driving method of the base 1 is not limited, and it can be electrically driven, hydraulically driven, or pneumatically driven. In addition, the suction channel is used to connect an external suction device, such as a medical suction pump, etc., for suctioning broken thrombi. The driving process and the suction process are not the technical problems to be solved by the utility model, so they are not described here.

[0033] In this embodiment, reference Figure 2, the guide part includes: a first guide part 21 and a second guide part 22. Among them, the guide tube 2 is a straight tube, and the first guide part 21 and the second guide part 22 are respectively located at the two ends of the straight tube. The inner diameter of the first guide part 21 gradually decreases toward the blade 3. When the guide wire needs to pass through the first guide part 21 of the guide tube 2, the guide wire first touches the large diameter of the outermost circle of the first guide part 21. Since the inner diameter of the first guide part 21 is a decreasing process, a slope with an arc structure is formed, and the slope can guide the guide wire directly into the interior of the guide tube 2. Similarly, the inner diameter of the second guide part 22 gradually increases toward the blade 3. When the guide wire needs to be pulled out from the interior of the guide tube 2, the guide wire first touches the small diameter of the innermost circle of the second guide part 22. Since the inner diameter of the second guide part 22 is an increasing process, another slope with an arc structure is formed, and the slope can guide the guide wire to be pulled out from the guide tube 2. In this process, the driving mode for driving the guide wire into or out of the guide tube 2 is not limited, and can be an electric driving mode, a hydraulic driving mode, or a pneumatic driving mode. Since the driving mode is not the technical problem to be solved by the utility model and is irrelevant to the present solution, it will not be described here.

[0034] In some embodiments, Figure 1 It can be seen that three supporting ridges 12 are provided, and the three supporting ridges 12 are arranged in a circular array along the center position of the base 1. The angle between adjacent supporting ridges 12 is 120°, and the area formed by the suction channel is a fan-shaped area. In the present solution, the specific number of supporting ridges 12 is not limited, and it can be an even number or an odd number. Since the number of supporting ridges 12 will limit the area of ​​the suction channel, when producing the present medical rotary cutting component, rotary cutting components with different numbers of supporting ridges 12 can be processed to meet the needs of different thrombus sizes. Among them, the suction channel in the fan-shaped area can allow the broken thrombus to be quickly sucked out. In the present embodiment, the specific structure of the suction channel is not limited, and its specific structure varies depending on the number of supporting ridges 12 and the connection with the guide tube 2, and it can be a polygonal structure.

[0035] In some embodiments, the blade 3 can be fixed on the support edge 12 to support and fix the blade 3, so that when the blade 3 cuts the thrombus, the resistance it encounters can be transferred to the support edge 12, which is conducive to unloading the pressure of the thrombus on the blade 3. Of course, the blade 3 can also be fixed on the guide tube 2 to prevent the broken thrombus from falling into the gap between the guide tube 2 and the blade 3. When too many thrombus pieces accumulate in the gap, it is easy to interfere with the process of the blade 3 cutting other thrombi. In addition, the blade 3 can also be fixed on the support edge 12 and the guide tube 2 at the same time to increase the firmness of the connection.

[0036] It should be noted that in the above embodiment, since the base 1 is placed in a catheter, in order to avoid the blade 3 touching the inner wall of the catheter during the rotation of the base 1 and causing damage to the inner wall of the catheter, when the base 1 rotates, the rotation radius of the base 1 is greater than or equal to the rotation radius of the blade 3.

[0037] In some embodiments, in order to facilitate the blade 3 to successfully remove the thrombus, the blade edge of the blade 3 is tilted toward the thrombus. After repeated verification by technicians in this field, when the angle between the blade 3 and the end face of the base 1 is 15° to 30°, the effect of removing the thrombus is the best.

[0038] In some embodiments, reference Figure 3 The medical rotary cutting assembly may further include a connecting ring 5, a slip ring 4 is fixed to the outer periphery of the base 1, and the base 1 is rotatably sleeved in the connecting ring 5 through the slip ring 4. The connecting ring 5 is arranged at the front end of the catheter 6 and is located inside the catheter 6. The setting of the slip ring 4 can reduce the friction between the base 1 and the catheter.

[0039] In the description of the present invention, it should be understood that the terms "front end", "rear end", "axial", "circumference", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0040] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The above is only for explaining the implementation mode of the utility model and is not used to limit the utility model. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the utility model without creative work should be included in the protection scope of the utility model.

Claims

1. A medical rotary cutting assembly, characterized in that: include: a base having an aspiration channel for passing a thrombus; A guide tube is fixed on the base and is coaxially arranged with the base. Both ends of the guide tube are provided with guide parts for guiding the passage and withdrawal of the guide wire. The blade is obliquely mounted on the base, and the blade extends to the outer surface of the guide tube.

2. The medical rotary cutting assembly according to claim 1, characterized in that: The guide portion comprises: a first guide portion, the inner diameter of which gradually decreases toward the blade; a second guide portion, the inner diameter of which gradually increases toward the blade; The first guide portion and the second guide portion are coaxially arranged opposite to each other.

3. The medical rotary cutting assembly according to claim 1, characterized in that: The base comprises: Ring parts; A plurality of supporting ribs are fixed to the inner wall of the annular member and extend to the outer surface of the guide tube. The suction channel is formed between the inner space of the annular member, the supporting ribs and the guide tube.

4. The medical rotary cutting assembly according to claim 3, characterized in that: The blade is fixed to the supporting rib and / or the guide tube.

5. The medical rotary cutting assembly according to claim 1, characterized in that: The blade edge of the blade is inclined toward the thrombus, and the angle between the blade and the end surface of the base is 15° to 30°.

6. The medical rotary cutting assembly according to claim 1, characterized in that: When the base rotates, the rotation radius of the base is greater than or equal to the rotation radius of the blade.

7. The medical rotary cutting assembly according to claim 1, characterized in that: The area formed by the suction channel is a fan-shaped area.

8. The medical rotary cutting assembly according to claim 1, characterized in that: A connecting ring is sleeved on the base along the rotation direction of the base, and the connecting ring is rotatably connected with the base.

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