Shaving cutter and shaving device

Abstract

The present disclosure provides a shaving cutter, comprising: a tubular outer cutter and a tubular inner cutter configured inside the tubular outer cutter and capable of rotating relative to the tubular outer cutter; wherein the tubular inner cutter comprises a first cutting portion, a central axis of the tubular outer cutter, an end of the tubular outer cutter close to the tissue to be removed is the front end of the tubular outer cutter, the front end of the tubular outer cutter has a first opening in the direction of the central axis, and at least part of the first cutting portion protrudes from the first opening of the tubular outer cutter to the outside of the tubular outer cutter to directly cut the tissue to be removed along the central axis direction through the cutting edge of the front end of the first cutting portion. The present disclosure also provides a shaving device.

Description

Technical Field

[0001] This disclosure relates to a planing tool and a planing device, belonging to the field of medical device technology. Background Technology

[0002] With the development of medical technology and the widespread application of endoscopic technology, hysteroscopic surgery has also developed, and the overall trend is towards greater safety, non-invasive or minimally invasive procedures, and higher efficiency.

[0003] Endoscopic power systems for hysteroscopic surgery are designed for trained gynecologists to perform intrauterine surgeries under hysteroscopic guidance, removing intrauterine tissues including submucosal fibroids and endometrial polyps.

[0004] The window of the gynecological shaving head in the prior art is set on the side of the front end of the head, which is difficult to cut at the bottom of the uterine cavity.

[0005] Furthermore, when this type of planing head is in operation, the tissue needs to be drawn into the window before it can be cut. However, larger, hard fibroid tissues are not easily deformed, and it is difficult to draw these tissues into the window and cut them using only suction, resulting in extremely low efficiency in the cutting process. Summary of the Invention

[0006] To solve one of the aforementioned technical problems, this disclosure provides a planing tool and a planing apparatus.

[0007] According to one aspect of this disclosure, a planing tool is provided, comprising: a tubular outer blade and a tubular inner blade disposed within the tubular outer blade and rotatable relative to the tubular outer blade;

[0008] The tubular inner blade includes a first cutting section, a central axis of the tubular outer blade, and a front end of the tubular outer blade near the tissue to be removed. The front end of the tubular outer blade has a first opening in the direction of the central axis. At least a portion of the first cutting section extends from the first opening of the tubular outer blade to the outside of the tubular outer blade, so as to directly cut the tissue to be removed along the central axis direction through the cutting edge of the front end of the first cutting section.

[0009] According to at least one embodiment of the planer of the present disclosure, the distance between the portion of the first cutting part extending out of the first opening and the front end of the tubular outer blade is 0.3-1 mm.

[0010] According to at least one embodiment of the planer of the present disclosure, a second opening is formed on the side of the tubular outer blade, and the boundary line of the second opening is formed as the cutting portion of the tubular outer blade.

[0011] According to at least one embodiment of the planing tool of this disclosure, the first opening and the second opening are in communication to form an integral opening.

[0012] According to at least one embodiment of the planing tool of this disclosure, the first opening is formed through an end face perpendicular to or substantially perpendicular to the central axis of the tubular outer blade.

[0013] According to at least one embodiment of the planing cutter of the present disclosure, the second opening is formed by an inclined side surface, wherein the side surface is close to the central axis of the tubular outer cutter in a rear-to-front direction.

[0014] According to at least one embodiment of the planing tool of this disclosure, the side surface and the end face are connected by a smooth curved surface.

[0015] According to at least one embodiment of the planing tool of this disclosure, the angle between the side surface and the central axis of the tubular outer blade is 7-10°.

[0016] According to at least one embodiment of the planer of the present disclosure, the tubular inner blade includes a second cutting portion that extends at least partially from the second opening to the outside of the tubular outer blade.

[0017] According to at least one embodiment of the planer of the present disclosure, the tubular inner blade includes a central axis, and the second cutting portion includes a length direction, the length direction of the second cutting portion being consistent with the direction of the central axis of the tubular inner blade.

[0018] According to at least one embodiment of the planer of the present disclosure, the second cutting portion is provided as at least two, and the at least two second cutting portions are distributed at intervals from each other along the circumferential direction of the tubular inner blade.

[0019] According to at least one embodiment of the planer of the present disclosure, a first fluid flow channel is formed between at least two second cutting portions.

[0020] According to at least one embodiment of the planer of the present disclosure, the front end of the second cutting part is connected via the first cutting part.

[0021] According to at least one embodiment of the planer of the present disclosure, the first cutting portion includes at least two cutting bodies, a second fluid flow channel is formed between two adjacent cutting bodies, and the second fluid flow channel is in communication with the first fluid flow channel.

[0022] According to at least one embodiment of the planer of the present disclosure, the cutting body includes a first surface and a second surface, wherein the first surface, the second surface and the outer peripheral surface of the first cutting portion jointly define the cutting body, and wherein the connection between the first surface and the second surface forms the cutting edge of the cutting body.

[0023] According to at least one embodiment of the planer of the present disclosure, the first surface is formed as the front cutting face of the cutting body, and the second surface is formed as the rear cutting face of the cutting body.

[0024] According to at least one embodiment of the planing tool of the present disclosure, at least a portion of the first surface is a helical surface, and / or, at least a portion of the second surface is a helical surface.

[0025] According to at least one embodiment of the planer of the present disclosure, at least a portion of the second surface is a plane, wherein the cutting edge of the cutting body is the junction of the plane and the first surface.

[0026] According to at least one embodiment of the planer of the present disclosure, when the planer is in perpendicular contact with the tissue to be removed, the plane of the second surface is at a preset angle to the tissue to be removed, and the starting point of the second fluid flow channel is restricted by the gap between the plane of the second surface and the tissue to be removed.

[0027] According to at least one embodiment of the planer of the present disclosure, the second cutting portion is limited by the outer peripheral surface and the inner cutting surface of the tubular inner blade, wherein the inner cutting surface causes the cutting edge of the second cutting portion to be serrated.

[0028] According to at least one embodiment of the planer of the present disclosure, the inner cutting surface is formed by interconnected sawtooth curves extending along a predetermined direction, wherein the predetermined direction is perpendicular to the central axis of the tubular inner blade.

[0029] A planer according to at least one embodiment of the present disclosure is used to remove diseased tissue in gynecological surgery.

[0030] According to another aspect of this disclosure, a planing apparatus is provided, which includes the planing blade described above. Attached Figure Description

[0031] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0032] Figure 1 This is a schematic diagram of the structure of a planing tool according to one embodiment of the present disclosure.

[0033] Figure 2 A schematic diagram of a tubular external blade according to one embodiment of the present disclosure is shown.

[0034] Figure 3 This is a schematic diagram of the structure of a tubular inner knife according to one embodiment of the present disclosure.

[0035] Figure 4 This is a structural schematic diagram of a tubular inner knife from another angle according to one embodiment of the present disclosure.

[0036] Figure 5 A schematic diagram of the engagement of a tubular external blade and a tubular internal blade according to one embodiment of the present disclosure is shown.

[0037] The specific labels in the attached figures are as follows:

[0038] 100 base section

[0039] 200 connecting part

[0040] 300 external tool connector

[0041] 400 tubular external knife

[0042] 401 First Opening

[0043] 402 Second Opening

[0044] 403 end face

[0045] 404 side surface

[0046] 500 tubular inner knife

[0047] 510 pipe body part

[0048] 520 First Cutting Section

[0049] 521 First Surface

[0050] 522 Second Surface

[0051] 523 cutting blade

[0052] 530 Second Cutting Section

[0053] 531 inner cut surface

[0054] 540 First Fluid Flow Channel

[0055] 550 Second fluid flow channel. Detailed Implementation

[0056] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0057] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0059] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0060] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0061] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0062] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0063] Figure 1 This is a schematic diagram of the structure of a planing tool according to one embodiment of the present disclosure.

[0064] like Figure 1 As shown, the planer disclosed herein can be mounted on a tool such as an operating handle for use in gynecological surgery to remove diseased tissue from the human body, thereby forming a planing device.

[0065] More specifically, such as Figure 1 As shown, the planer may include a base portion 100, which may be fixed to an operating handle, so that the doctor can operate the planer by holding the operating handle. Thus, the cutting end of the planer is the front of the planer, and correspondingly, the other end of the planer is the rear of the planer.

[0066] like Figure 1As shown, the planer may also include components such as a connecting part 200, an outer cutter joint part 300, an inner cutter joint part, a tubular outer cutter 400, and a tubular inner cutter 500.

[0067] More specifically, one end of the outer blade connector 300 is connected to the rear end of the tubular outer blade 400, and the other end of the outer blade connector 300 is fixed to the base 100.

[0068] In this disclosure, the outer blade connector 300 is also formed as a tubular structure and has a relatively long length so that the cutting end of the planer can reach the tissue to be removed from the human body. Correspondingly, the outer blade connector 300 also needs to have greater rigidity.

[0069] Figure 2 A schematic diagram of a tubular external blade according to one embodiment of the present disclosure is shown.

[0070] like Figure 2 As shown, the tubular external blade 400 includes a front end and a corresponding rear end. The rear end of the tubular external blade 400 is fixed to the front end of the external blade connector 300. For example, the tubular external blade 400 can be fixed to the front end of the external blade connector 300 by bonding or welding. Of course, the tubular external blade 400 can also be integrally formed with the external blade connector 300.

[0071] The tubular outer blade 400 is generally tubular in structure and has a central axis (indicating the axial direction). The central axis of the tubular outer blade 400 is set to coincide with the axis of the outer blade connector 300, so that the outer blade connector 300 and the tubular outer blade 400 have internal spaces extending in the same direction.

[0072] See again Figure 2 The tubular external blade 400 has a first opening 401 at its front end, meaning that the front end of the tubular external blade 400 is not closed. In this disclosure, the first opening 401 can be formed to have the same or approximately the same shape as the cross-section of the internal space of the tubular external blade 400 (i.e., along a plane perpendicular to the central axis). In this case, the shape of the first opening 401 is restricted by the tubular body of the tubular external blade 400, that is, the first opening 401 is formed by an end face 403 perpendicular to or approximately perpendicular to the central axis.

[0073] In this disclosure, a second opening 402 is formed on the side of the tubular external blade 400, and the boundary line of the second opening 402 is formed as the cutting portion of the tubular external blade 400.

[0074] In a preferred embodiment, the first opening 401 and the second opening 402 are connected, forming a single integral opening. In this case, the second opening 402 can be formed by an inclined side surface 404. In this disclosure, the side surface 404 can be either a plane or a curved surface. Figure 2 In the specific example shown, the side surface 404 is an inclined plane, and the side surface 404 is close to the central axis in a direction from back to front.

[0075] More preferably, in order to form the above-mentioned integral opening, the end face 403 and the side surface 404 are connected by a smooth curved surface, thereby preventing the sharp connection from scratching human tissue.

[0076] In a preferred embodiment, the angle between the side surface 404 and the central axis is 7-10°, thereby forming a second opening 402 of suitable size and improving the cutting efficiency of the tissue to be removed.

[0077] Figure 3 This is a schematic diagram of the structure of a tubular inner knife according to one embodiment of the present disclosure. Figure 4 This is a structural schematic diagram of a tubular inner knife from another angle according to one embodiment of the present disclosure.

[0078] like Figure 3 and Figure 4 As shown, the tubular inner blade 500 includes components such as a tube body 510, a first cutting section 520, and a second cutting section 530. Preferably, the tube body 510, the first cutting section 520, and the second cutting section 530 can be integrally formed.

[0079] The tube body portion 510 is formed as the rear end of the tubular inner blade 500. In one embodiment, the rear end of the tube body portion 510 can be connected to the inner blade connector portion (not shown in the figure). At this time, a central through hole is formed inside the base portion 100, and the other end (rear end) of the inner blade connector portion passes through the central through hole and is connected to the connecting portion 200.

[0080] In one embodiment, the connecting portion 200 is provided with a suction channel, and the inner blade connector portion is also tubular with a liquid flow channel formed inside. The liquid flow channel can communicate with the suction channel. Accordingly, when negative pressure is applied to the connecting portion 200, the liquid and the removed tissue can flow together through the tubular inner blade 500, the inner blade connector portion, and the connecting portion 200, and then be discharged.

[0081] In one embodiment, the tube body 510 is generally tubular in structure and has a central axis, which is also the rotation axis of the tubular inner blade 500, and correspondingly, also the central axis of the tubular inner blade 500. More preferably, the central axis (rotation axis) of the tubular inner blade 500 is coaxially arranged with the central axis (rotation axis) of the inner blade connecting portion, thereby enabling the tubular inner blade 500 and the inner blade connecting portion to rotate stably.

[0082] The second cutting portion 530 includes a length direction, which is aligned with the central axis direction of the tubular inner blade 500. In one embodiment, the rear end of the second cutting portion 530 is connected to the tube body portion 510, and the front end of the second cutting portion 530 is connected via the first cutting portion 520.

[0083] The second cutting portion 530 is provided in at least two configurations, and the at least two second cutting portions 530 are distributed at intervals from each other along the circumferential direction of the tubular inner blade 500. In such a way... Figure 3 and Figure 4 In the specific embodiment shown, there are two second cutting portions 530. These two second cutting portions 530 are symmetrically arranged based on a plane including the central axis of the tubular inner blade 500, or in other words, they are symmetrically arranged based on the central axis of the tubular inner blade 500.

[0084] At this time, the two second cutting sections 530 are spaced a certain distance apart, and a first fluid flow channel 540 is formed between the second cutting sections 530 so that the cut tissue and liquid are transported backward to the inner blade connection section through the first fluid flow channel 540 and the internal space of the tube body 510.

[0085] like Figure 3 and Figure 4 As shown, the front end of the second cutting part 530 can be connected to the rear end of the first cutting part 520. Correspondingly, the front end of the first cutting part 520 is formed as a cutting structure of a tubular inner blade 500.

[0086] In a preferred embodiment, the first cutting section 520 includes at least two cutting elements, and a second fluid flow channel 550 is formed between two adjacent cutting elements. The second fluid flow channel 550 communicates with the first fluid flow channel 540. In this disclosure, the first fluid flow channel 540 is formed in a straight line shape, and the second fluid flow channel is formed in a spiral shape.

[0087] like Figure 3 and Figure 4As shown, the cutting body includes a first surface 521 and a second surface 522, wherein the first surface 521, the second surface 522 and the outer peripheral surface of the first cutting portion 520 jointly define the cutting body, wherein the connection between the first surface 521 and the second surface 522 forms the cutting edge 523 of the cutting body.

[0088] The first surface 521 forms the front cutting face of the cutting body, meaning that the tissue cut by the cutting body enters the second fluid flow channel 550 from the first surface 521; or, in other words, the first surface 521 forms a wall of the second fluid flow channel 550. The second surface 522 forms the rear cutting face of the cutting body. Accordingly, the second surface 522 ensures that the cutting body has a sharp cutting edge, and it can also form a wall of the second fluid flow channel 550. That is, the removed tissue can flow backward through the second fluid flow channel 550, which is jointly restricted by the first surface of one cutting body and the second surface of the other cutting body.

[0089] In one specific embodiment, at least a portion of the first surface 521 is a helical surface; more preferably, the first surface 521 is formed entirely as a helical surface, thereby controlling the blade inclination angle of the cutting body within a reasonable range. In one embodiment, the blade inclination angle can be 10-15°, thereby giving the cutting body a sharp cutting edge and improving the efficiency of cutting tissue, ensuring effective cutting of hard fibroid tissue.

[0090] Meanwhile, the cut tissue can be transferred backward through the spiral groove behind the cutting edge (part of the second fluid flow channel) and will not get tangled in the cutting edge.

[0091] In this disclosure, the cutting body can be configured as two, thereby improving the cutting efficiency; and the cutting edges 523 of the two cutting bodies are both perpendicular to the central axis of the tubular inner knife 500 and are formed on a straight line.

[0092] On the other hand, at least a portion of the second surface 522 is a helical surface; more preferably, at least a portion of the second surface 522 is a plane, wherein the cutting edge of the cutting body is the connection point between the plane and the first surface 521.

[0093] In this disclosure, the plane of the second surface 522 is not perpendicular to the central axis of the tubular inner blade 500, but is inclined. In one embodiment, when the planer is in perpendicular contact with the tissue to be removed, the plane of the second surface 522 forms a preset angle with the tissue to be removed, and the gap between the plane of the second surface 522 and the tissue to be removed restricts the starting point of the second fluid flow channel 550.

[0094] See again Figure 3 and Figure 4 The second cutting portion 530 is limited by the outer peripheral surface and the inner cutting surface 531 of the tubular inner blade 500, wherein the inner cutting surface 531 makes the cutting edge of the second cutting portion 530 serrated.

[0095] More specifically, the inner cutting surface 531 is formed by interconnected sawtooth curves extending along a predetermined direction, wherein the predetermined direction is perpendicular to the central axis of the tubular inner blade 500.

[0096] Figure 5 A schematic diagram of the engagement of a tubular external blade and a tubular internal blade according to one embodiment of the present disclosure is shown.

[0097] In the planing cutter disclosed herein, the tubular inner cutter 500 can be disposed within the tubular outer cutter 400 and can rotate relative to the tubular outer cutter 400; correspondingly, when the base portion 100 remains stationary, the connecting portion 200 should be able to be driven to rotate, thereby causing the tubular inner cutter 500 to rotate.

[0098] At least a portion of the first cutting portion 520 extends from the first opening 401 of the tubular outer blade 400 to the outside of the tubular outer blade 400; more preferably, the connecting portion 200 can also be configured to be positionally adjustable relative to the base portion 100, thereby enabling real-time adjustment of the size of the tubular inner blade 500 extending from the tubular outer blade 400, and when the tubular outer blade 400 is not in use, it can at least partially retract into the inside of the first opening of the tubular outer blade 400.

[0099] In a preferred embodiment, the distance between the portion of the first cutting part 520 extending out of the first opening and the front end of the tubular external blade 400 is 0.3-1mm. Preferably, this distance can be 0.5mm. By setting this distance value, on the one hand, the tissue removal efficiency is high, and on the other hand, it is convenient for doctors to operate, ensuring the safety of cutting while reducing the dependence on suction.

[0100] See again Figure 5 In this disclosure, the second cutting portion 530 of the tubular inner blade 500 extends at least partially from the second opening 402 to the outside of the tubular outer blade 400.

[0101] More preferably, such as Figure 5 As shown, with respect to the overall opening, at least portions of the second cutting portion 530 and the first cutting portion 520 of the tubular inner blade 500 can extend from the overall opening to the outside of the tubular outer blade 400.

[0102] Therefore, the shaving tool disclosed herein is suitable for cutting tissue at the bottom of the uterine cavity due to the exposed first cutting part 520 and / or second cutting part 530 and other components; in particular, when the shaving tool has poor suction effect, it can also directly cut hard fibroid tissue without sucking the tissue into the window, which greatly improves the tissue cutting efficiency.

[0103] More specifically, the planer disclosed herein has a first opening at the front end of the tubular outer blade 400, and the first cutting portion 520 of the tubular inner blade 500 extends from the first opening, which allows the first cutting portion 520 to directly cut the tissue at the bottom of the uterine cavity; moreover, the first cutting portion 520, which is in the shape of a milling cutter, can directly cut hard fibroid tissue without sucking the tissue into the window.

[0104] Therefore, the shaving blade disclosed herein, through the setting of the second opening, can effectively cut large areas of polyps, and doctors can also observe the working status and position of the first cutting part through the second opening, ensuring safety.

[0105] According to another aspect of this disclosure, a planing apparatus is also provided, which includes the planing blade described above.

[0106] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0107] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0108] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A planing tool, characterized in that, include: The device includes an outer blade connector, a tubular outer blade, and a tubular inner blade disposed within the tubular outer blade and capable of rotating relative to the tubular outer blade, wherein the rear end of the tubular outer blade is fixed to the front end of the outer blade connector. The tubular inner blade includes a first cutting section, and the tubular outer blade includes a central axis. The end of the tubular outer blade near the tissue to be removed is the front end of the tubular outer blade. The front end of the tubular outer blade has a first opening in the direction of the central axis. At least a portion of the first cutting section extends from the first opening of the tubular outer blade to the outside of the tubular outer blade, so as to directly cut the tissue to be removed along the central axis direction through the cutting edge of the front end of the first cutting section. The tubular outer blade has a second opening on its side, and the boundary line of the second opening forms a cutting portion of the tubular outer blade; the tubular inner blade includes a second cutting portion, which extends at least partially from the second opening to the outside of the tubular outer blade; the distance between the portion of the first cutting portion extending out of the first opening and the front end of the tubular outer blade is 0.3-1 mm. The second cutting section is configured as at least two, and the at least two second cutting sections are distributed at intervals to each other along the circumferential direction of the tubular inner blade; a first fluid flow channel is formed between the at least two second cutting sections, and the front ends of the second cutting sections are connected through the first cutting section.

2. The planing tool as described in claim 1, characterized in that, The first opening and the second opening are connected to form a single, integral opening.

3. The planing tool as described in claim 2, characterized in that, The first opening is formed through an end face that is perpendicular to or substantially perpendicular to the central axis of the tubular external blade.

4. The planing tool as described in claim 2, characterized in that, The second opening is formed by an inclined side surface, wherein the side surface is close to the central axis of the tubular outer blade in a direction from back to front.

5. The planing tool as described in claim 4, characterized in that, The side surface and the end surface are connected by a smooth curved surface.

6. The planing tool as described in claim 4, characterized in that, The angle between the side surface and the central axis of the tubular external blade is 7-10°.

7. The planing tool as described in claim 1, characterized in that, The tubular inner blade includes a central axis, and the second cutting portion includes a length direction, the length direction of the second cutting portion being consistent with the direction of the central axis of the tubular inner blade.

8. The planing tool as described in claim 1, characterized in that, The first cutting section includes at least two cutting bodies, and a second fluid flow channel is formed between two adjacent cutting bodies. The second fluid flow channel is connected to the first fluid flow channel.

9. The planing tool as described in claim 8, characterized in that, The cutting body includes a first surface and a second surface, wherein the first surface, the second surface and the outer peripheral surface of the first cutting portion together define the cutting body, and the connection between the first surface and the second surface forms the cutting edge of the cutting body.

10. The planing tool as described in claim 9, characterized in that, The first surface is formed as the front cutting face of the cutting body, and the second surface is formed as the rear cutting face of the cutting body.

11. The planing tool as described in claim 9, characterized in that, At least a portion of the first surface is a helical surface, and / or at least a portion of the second surface is a helical surface.

12. The planing tool as described in claim 11, characterized in that, At least a portion of the second surface is a plane, wherein the cutting edge of the cutting body is the junction of the plane and the first surface.

13. The planing tool as described in claim 12, characterized in that, When the planer makes perpendicular contact with the tissue to be removed, the plane of the second surface forms a preset angle with the tissue to be removed, and the starting point of the second fluid flow channel is restricted by the gap between the plane of the second surface and the tissue to be removed.

14. The planing tool as described in claim 1, characterized in that, The second cutting section is limited by the outer peripheral surface and the inner cutting surface of the tubular inner blade, wherein the inner cutting surface makes the cutting edge of the second cutting section serrated.

15. The planing tool as described in claim 14, characterized in that, The inner cutting surfaces are formed by interconnected sawtooth curves extending along a predetermined direction, wherein the predetermined direction is perpendicular to the central axis of the tubular inner blade.

16. The planing tool according to any one of claims 1-15, characterized in that, The shaving blade is used to remove diseased tissue in gynecological surgery.

17. A planing device, characterized in that, Includes the planing tool as described in any one of claims 1-16.

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