Deep tissue cutting head and deep tissue cutter

Abstract

The invention provides a deep tissue cutting head and a deep tissue cutter, and the cutting head comprises an outer sleeve which is of a tubular structure with a closed bottom surface, the side surface of the outer sleeve is provided with a cutting opening, and the inner edge of the cutting opening is convexly provided with at least one first cutting edge; the axial direction of the first cutting blade is approximately parallel to the pipe wall of the outer sleeve; or the tail end of the first cutting edge points to the inner wall of the outer sleeve; the inner sleeve is arranged in the outer sleeve in a sleeved mode, the inner sleeve is of a hollow tubular structure with the two ends open, and a second cutting edge matched with the first cutting edge is arranged on the bottom face, close to the outer sleeve, of the inner sleeve in a protruding mode; the inner sleeve can perform rotation and / or axial linear motion in the outer sleeve, so that when the first cutting edge and the second cutting edge are in contact, a shearing effect is formed together, and tissues in the cutting opening are sheared. According to the structural design, vibration in the equipment operation process is remarkably reduced, and meanwhile the cutting frequency and the safety of surgical operation are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of deep tissue cutting, and in particular relates to a deep tissue cutting head and a deep tissue cutter. Background Art

[0002] Vitrectomy is a common procedure in ophthalmology, primarily used to treat eye conditions such as retinal detachment and macular holes. The procedure requires the use of a slender cutting head to enter the eye through a tiny incision approximately 1 mm in diameter. The vitreous humor is removed using a combination of negative pressure suction and cutting. Traditional deep tissue cutting devices typically consist of an inner and outer cannula. The inner cannula reciprocates back and forth within the outer cannula, severing the tissue drawn into the opening and expelling it through a negative pressure system.

[0003] While this design meets clinical needs to a certain extent, it has significant limitations: to improve surgical efficiency and safety, the cutting frequency (i.e., the frequency of the reciprocating motion) of the inner cannula needs to be significantly increased. However, existing technology struggles to support higher reciprocating motion frequencies, and frequent reciprocating motion can cause significant vibration in the cutting head, which not only affects surgical precision but can also cause unnecessary damage to surrounding ocular tissue, thus limiting the advancement and development of this type of surgery.

[0004] Therefore, there is an urgent need to provide a deep tissue cutting head that can achieve a higher cutting frequency while reducing vibration. Summary of the Invention

[0005] In view of the above problems in the prior art, the purpose of this article is to provide a deep tissue cutting head and a deep tissue cutter to solve the problem of low cutting frequency of the inner cannula in the prior art.

[0006] In order to solve the above technical problems, the specific technical solutions of this article are as follows: In one aspect, the present invention provides a deep tissue cutting head, comprising: The outer sleeve is a tubular structure with a closed bottom surface and a cutting opening on the side surface. The cutting opening is arranged close to the bottom surface, and at least one first cutting edge is protruded from the inner edge of the cutting opening. The axial direction of the first cutting edge is substantially parallel to the wall of the outer sleeve; or the end of the first cutting edge points to the inner wall of the outer sleeve; An inner sleeve is sleeved inside the outer sleeve, the inner sleeve being a hollow tubular structure with two ends open, and a second cutting edge matching the first cutting edge is protruded from the bottom surface of the inner sleeve near the outer sleeve; The inner sleeve can perform rotation and / or axial linear motion inside the outer sleeve, so that when the first cutting edge and the second cutting edge come into contact, they jointly form a shearing effect to shear the tissue in the incision.

[0007] Optionally, the bottom surface of the outer sleeve is a planar structure, and there is an arc-shaped transition between the bottom surface and the side wall of the outer sleeve.

[0008] Optionally, the cutting opening is further provided with at least one first cutting tooth; The axial direction of the first cutting teeth is substantially parallel to the wall of the outer sleeve; or the ends of the first cutting teeth point toward the inner wall of the outer sleeve; A third cutting edge is formed at the inner edge of the outer periphery of the first cutting tooth. When the third cutting edge contacts the second cutting edge, a shearing effect is jointly generated.

[0009] Optionally, a second cutting tooth is protrudingly provided on the bottom surface of the inner sleeve close to the outer sleeve; A fourth cutting edge is formed at the inner edge of the outer periphery of the second cutting tooth. When the fourth cutting edge contacts the first cutting edge and / or the third cutting edge, a shearing effect is jointly generated.

[0010] Optionally, the wall thickness of the outer sleeve decreases gradually from the cutting opening to the opening of the outer sleeve, and the opening of the outer sleeve is the end opposite to the bottom surface.

[0011] Optionally, the cross-section of the first cutting edge, the second cutting edge, the third cutting edge and / or the fourth cutting edge is streamlined.

[0012] Optionally, the first cutting teeth are arranged on a side away from the bottom surface.

[0013] In another aspect, the present application provides a deep tissue cutter, comprising: The deep tissue cutting head as described in any one of the above items, wherein the deep tissue cutting head comprises: an outer cannula and an inner cannula; a body, the outer periphery of which is connected to the outer sleeve; The body comprises: a driving member connected to the inner sleeve to drive the inner sleeve to perform rotation and / or axial linear motion within the outer sleeve; A negative pressure tube is connected to one end of the inner sleeve.

[0014] Optionally, the body further includes: a housing, the outer periphery of which is connected to the outer sleeve, and the inner cavity of which is used to accommodate the driving member and the negative pressure tube; The cross section of the housing gradually increases from an end close to the deep tissue cutting head to an end away from the deep tissue cutting head.

[0015] Optionally, a temperature sensor and a pressure sensor are further provided inside the housing; The temperature sensor is used to detect the internal temperature of the inner sleeve; The pressure sensor is used to detect the internal pressure of the inner sleeve.

[0016] The deep tissue cutting head provided by this invention utilizes a first cutting blade and a second cutting blade that cooperate with each other between an outer and inner cannula. This blade utilizes rotational and / or axial motion to achieve shearing, replacing the traditional high-frequency reciprocating motion used for cutting. This structural design significantly reduces vibration during operation, while simultaneously increasing cutting frequency and surgical safety. It is particularly suitable for high-precision, minimally invasive surgeries such as vitrectomy.

[0017] In order to make the above and other purposes, features and advantages of this article more obvious and easy to understand, the following specifically cites preferred embodiments and provides detailed descriptions in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this article or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of this article. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of an outer sleeve according to an embodiment of the present invention is shown; Figure 2 A schematic structural diagram of another outer sleeve according to an embodiment of the present invention is shown; Figure 3 A schematic structural diagram of an inner sleeve according to an embodiment of the present invention is shown; Figure 4 A schematic structural diagram of another inner sleeve according to an embodiment of the present invention is shown; Figure 5 A schematic structural diagram of a deep tissue cutter according to an embodiment of the present invention is shown; 01-Deep Tissue Cutter 02-Ontology 03-Deep tissue cutting head 04-Temperature Sensor 05-Speed ​​sensor 06-Pressure Sensor 07-Brake 08-Driver 09-Outer sleeve 10-Inner casing 11- Cutting edge 12-Second cutting edge 13-First incisor 14-Third cutting edge 15-Second incisor 16-Fourth cutting edge 17-Connecting wire 18-Hose 19-Negative pressure tube 20-shell 21-Inner casing opening. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of this document. Obviously, the embodiments described are only part of the embodiments of this document, not all of the embodiments. Based on the embodiments of this document, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this document.

[0021] It should be noted that the terms "first," "second," and the like in the specification and claims herein and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or device comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or devices.

[0022] In order to solve the above problems, the embodiments of this article provide a deep tissue cutting head and a deep tissue cutter. By setting the cutting port 11 on the side wall of the outer sleeve 9, the inner sleeve 10 inside can achieve rotation and / or axial linear motion, thereby increasing the cutting frequency of the inner sleeve 10. Figure 5 The schematic diagram of the structure of a deep tissue cutter in the embodiment of this invention is shown, but it can include more or fewer operating components based on conventional or uncreative work. Figures 1 to 4 As shown, the present application provides a deep tissue cutting head, comprising: an inner cannula 10 and an outer cannula 9, specifically as follows: The outer sleeve 9 is a tubular structure with a closed bottom surface, usually made of medical stainless steel or other materials with sufficient strength and good biocompatibility. It is used to support the entire cutting head and serve as the main structure in contact with the target tissue. A cutting opening 11 is provided on the side wall of the outer sleeve 9. The cutting opening 11 is arranged at a position close to the side wall of the outer sleeve 9 and close to the bottom surface, so as to facilitate the introduction of the tissue to be cut into the cutting area. At least one first cutting edge is provided at the inner edge of the cutting opening 11. The first cutting edge is formed by protruding inward from the inner wall of the outer sleeve 9 to enhance the shearing effect on the tissue entering the cutting opening 11. The cutting opening 11 refers to an opening structure provided on the side wall of the outer sleeve 9 for guiding the tissue to be cut into the shearing area.

[0023] Among them, the setting mode of the first cutting edge includes but is not limited to two forms: one is that its axial direction is roughly parallel to the tube wall of the outer sleeve 9 and extends linearly; the other is that its end points to the center direction of the inner wall of the outer sleeve 9, forming a guiding structure with a certain inclination angle.

[0024] The inner sleeve 10 is a hollow tubular structure with openings at both ends. It is nested inside the outer sleeve 9 as a whole and can move relative to the outer sleeve 9. The inner sleeve 10 not only serves to guide the cut tissue, but also participates in the execution of the shearing action. A second cutting edge 12 is provided at the inner sleeve opening 21 at one end of the inner sleeve 10 close to the bottom surface of the outer sleeve 9. The second cutting edge 12 corresponds to the position of the first cutting edge on the outer sleeve 9 and maintains a matching relationship in terms of geometry and movement path to ensure that the two can effectively contact and generate shear force during relative movement. It is understandable that the second cutting edge 12 can be a circumferential structure with the same shape as the inner sleeve opening 21, that is, the inner edge of the inner sleeve opening 21 is provided with a second cutting edge 12.

[0025] The inner cannula 10 can perform rotational motion and / or axial linear motion within the outer cannula 9. "Rotation" refers to the rotation of the inner cannula 10 about its own axis; "axial linear motion" refers to its forward and backward movement along the axial direction of the outer cannula 9. These two motion modes can be used individually or in combination to cause the second cutting edge 12 to move relative to the first cutting edge, thereby achieving a shearing action. When the two cutting edges cooperate, tissue entering the incision port 11 can be efficiently and precisely sheared.

[0026] The deep tissue cutting head provided by this invention utilizes a first cutting blade (12) and a second cutting blade (12) that cooperate with each other between an outer cannula (9) and an inner cannula (10). This cutting action is achieved through rotational and / or axial motion, replacing the traditional high-frequency reciprocating motion used for cutting. This structural design significantly reduces vibration during operation, while simultaneously increasing the cutting frequency and surgical safety. It is particularly suitable for high-precision minimally invasive surgeries such as vitrectomy.

[0027] Building on the above-mentioned embodiments, in one embodiment of this specification, the outer cannula 9 serves as the primary support structure and the operating component that contacts tissue. Its front end, or bottom surface, adopts a planar design. Specifically, the bottom surface is flat overall, rather than curved, either concave or convex. This design helps improve the stability and controllability of the cutting head front end in minimally invasive environments, such as the intraocular environment, while also reducing accidental contact or damage to surrounding healthy tissue, thereby enhancing surgical safety. Furthermore, the outer diameter of the bottom surface is smaller than the inner diameter of the outer cannula 9, further reducing the contact area between the bottom surface and the intraocular space.

[0028] Furthermore, the bottom surface of the outer sleeve 9 and its sidewalls are connected by an arc-shaped transition. "Sidewall" refers to the cylindrical outer surface of the outer sleeve 9 extending axially; "arc-shaped transition" means that the connection between the bottom surface and the sidewalls is not a sudden change of right or sharp angles, but rather a gradual connection through a smooth curved surface. This structural design effectively avoids the adverse effects of friction and scratching caused by traditional right-angled edges, allowing for smoother entry and movement of the cutting head and reducing interference with the internal structures of the eye.

[0029] Furthermore, the curved transition design helps improve the fluid dynamics of the front end of the outer cannula 9, making the negative pressure suction process smoother and more easily guiding tissue to the vicinity of the incision 11, thereby increasing cutting efficiency. This structure is particularly suitable for high-precision minimally invasive surgeries such as vitrectomy, significantly improving the device's operability and safety while meeting the requirements for efficient cutting.

[0030] To further enhance the ability to grasp and shear tissue entering the incision 11, the outer sleeve 9 is further provided with at least one first cutting tooth 13 in the incision 11 area. The first cutting tooth 13 is a protrusion extending outward from the edge of the incision 11 of the outer sleeve 9, i.e., toward the tissue. Its primary function is to assist in guiding tissue into the incision area and to achieve initial shearing or enhance the shearing effect through the cutting edge formed on its surface.

[0031] The first incisor teeth 13 may be arranged in two ways, including but not limited to two configurations: one in which the axial direction is substantially parallel to the wall of the outer cannula 9, i.e., the incisor teeth extend along the length of the outer cannula 9 as a linear protrusion; the other in which the distal ends of the incisor teeth point toward the inner wall of the outer cannula 9, i.e., the free ends of the incisor teeth are tilted or curved toward the centerline of the outer cannula 9, thereby forming a more effective tissue guiding structure. The above designs can be selected based on actual surgical needs to optimize the efficiency of tissue entry into the cutting area and the stability of the shearing action.

[0032] Furthermore, a third cutting edge 14 is formed at the inner edge of the outer periphery of the first incisor 13. The outer periphery refers to the outer contour of the first incisor 13, and the inner edge refers to the edge of the incisor near the central axis of the outer sleeve 9. The third cutting edge 14 is a sharp-edged structure formed at this location through a machining process, and is used to participate in the shearing action. When the inner sleeve 10 moves within the outer sleeve 9, the second cutting edge 12 located at the front end of the inner sleeve 10 can come into relative contact or intersect with the third cutting edge 14, thereby generating a shear force and severing the tissue located in the area of ​​the incision 11.

[0033] By providing a first cutting tooth 13 with a third cutting edge 14 at the cutting opening 11 and cooperating with the second cutting edge 12 on the inner sleeve 10, not only the tissue grasping ability and shearing efficiency of the cutting head are enhanced, but also the stability and safety of the entire cutting head are further improved.

[0034] To further enhance cutting efficiency and shearing capability, the inner cannula 10 is further provided with at least one second cutting tooth 15 at its end near the bottom surface of the outer cannula 9, i.e., the operating end near the cutting opening 11. The second cutting tooth 15 is a structure protruding outward from the outer circumference of the inner cannula 10. Its primary function is to enhance the grip and guidance of tissue entering the cutting area, and to participate in the shearing action through the cutting edge formed at its edge.

[0035] The outer inner edge of the second cutting tooth 15 refers to the edge of the outer contour of the cutting tooth that is closest to the central axis of the inner sleeve 10. A fourth cutting edge 16, a sharp-edged cutting structure, is machined at this location to cooperate with the other cutting edges on the outer sleeve 9 to complete the shearing operation. The outer periphery refers to the outer contour of the cutting tooth, the inner edge refers to the side facing the central axis, and the fourth cutting edge 16 is the cutting surface formed by precision machining of this edge.

[0036] During actual operation, when the inner cannula 10 rotates and / or moves axially within the outer cannula 9, the fourth cutting edge 16 may come into relative contact or interlaced motion with the first and / or third cutting edges 14 at the incision opening 11 of the outer cannula 9. This means that the two cutting edges come into physical proximity or slightly overlap during this motion. In practice, the shear force generated by the relative motion between the fourth cutting edge 16 and the first and / or third cutting edges 14 can sever tissue located in the area of ​​the incision opening 11. This multi-blade collaborative design not only improves cutting frequency and efficiency, but also enhances adaptability to tissues of varying textures.

[0037] The outer tube 9, serving as the primary structural support and tissue-contacting component, features a specific design variation in wall thickness along the axial direction. Specifically, the wall thickness is greatest near the front end of the outer tube 9, where the incision 11 is located. From this location, the wall thickness gradually decreases as it extends axially toward the other end of the outer tube 9, opposite the bottom surface.

[0038] The opening of outer sleeve 9 is the opening at the other end opposite the bottom surface, and the wall thickness refers to the cross-sectional thickness of the outer sleeve 9 at a specific axial position. In this design, the wall thickness decreases continuously or in stages as it extends from the area where the cutout 11 is located toward the opening of outer sleeve 9.

[0039] By designing the outer tube 9 to have a gradually decreasing wall thickness from the cutting opening 11 toward the open end, the overall weight can be reduced and stress distribution optimized while maintaining mechanical strength in the cutting area. This improves the stability and responsiveness of the cutting head during high-frequency rotation or movement. Furthermore, this variable wall thickness structure helps improve the process adaptability of the outer tube 9 during manufacturing and enhances its operational flexibility in minimally invasive surgical environments.

[0040] In order to further improve the cutting efficiency and reduce the disturbance to the surrounding tissue during the cutting process, the multiple cutting blade structures on the outer sleeve 9 and the inner sleeve 10 include: at least one cross-section of the first cutting blade, the second cutting blade 12, the third cutting blade 14 and the fourth cutting blade 16 is designed to be streamlined.

[0041] Among them, streamlined means that the cross-sectional shape has a smooth transition and reduces resistance, similar to geometric shapes such as water droplets or ellipses with low flow resistance.

[0042] Designing any of these cutting blades to have a streamlined cross-section helps reduce frictional resistance during the cutting process, making it easier for tissue to enter the shear zone while also reducing the risk of tissue tearing caused by protrusions or sharp angles. Furthermore, the streamlined design improves fluid dynamics during vacuum suction, allowing tissue to be more smoothly guided to the cutting position, thereby enhancing overall cutting efficiency and surgical safety.

[0043] In the deep tissue cutting head provided by the present invention, the outer sleeve 9 is provided with a first cutting tooth 13 for assisting the shearing action. The first cutting tooth 13 is not located near the front end, i.e., the bottom surface, of the outer sleeve 9, but is located relatively far from the bottom surface, i.e., closer to the other end of the outer sleeve 9.

[0044] Positioning the first incisor 13 on the side away from the bottom surface helps optimize the spatial layout between the cutting edges within the cutting area. This allows the first incisor 13 to provide initial guidance and positioning during tissue inhalation, before the other cutting edges complete the precise shearing, thereby improving overall cutting stability and efficiency. Furthermore, this positioning design helps avoid accidental damage to surrounding healthy tissue due to the incisors being positioned too far forward, further enhancing surgical safety.

[0045] On the other hand, the present application provides a deep tissue cutter, comprising: the deep tissue cutting head as described above, a body 2 and other components, wherein the body 2 at least comprises: a driving member 8, a housing 20, a temperature sensor 4, a speed sensor 5, a pressure sensor 6, a brake 7, a connecting line 17, a hose 18, a negative pressure tube 19 and other components; Specifically, the outer sleeve 9 is a tubular structure with a closed bottom. Its sidewall is provided with a cutting opening 11 near the bottom. Cutting opening 11 is provided with a first cutting edge and first cutting teeth 13, with the first cutting teeth 13 positioned on the side away from the bottom. The inner sleeve 10 is sleeved within the outer sleeve 9. Its front end is provided with a second cutting edge 12 and second cutting teeth 15 that match the first and third cutting edges 14, and a fourth cutting edge 16 is formed at a corresponding position. The cross-section of each of these cutting edges is preferably streamlined to reduce resistance to tissue passage and improve shearing efficiency.

[0046] The main body 2 is slender in shape as a whole, and its outer periphery is fixedly connected to one end of the outer sleeve 9.

[0047] Specifically, the driving member 8 is connected to the inner cannula 10 and is capable of driving the inner cannula 10 to perform rotational motion and / or axial linear motion within the outer cannula 9. Rotational motion can be achieved by a micromotor driving a drive shaft, while axial linear motion can be achieved using an electromagnetic drive device or a microhydraulic cylinder. This combined motion creates a shearing effect between the second cutting edge 12 on the inner cannula 10 and the first, third, or fourth cutting edges 14, 16 on the outer cannula 9, thereby achieving efficient cutting of tissue entering the incision 11.

[0048] One end of the negative pressure tube is connected to the rear end of the inner cannula 10, and the other end is connected to the external negative pressure system. When the cutting is completed, the negative pressure system sucks out the sheared tissue fragments through the negative pressure tube, ensuring the cleanliness of the surgical area and helping to continuously attract the tissue to be cut into the cutting area.

[0049] The housing 20 encloses the driver 8, the negative pressure tube, and associated control circuitry, and its outer periphery is fixedly connected to the outer sleeve 9. The housing 20 extends from the end closest to the cutting head toward the end further away from the cutting head, with its cross-sectional area gradually increasing, forming a tapered, expanding structure. This design not only improves the overall grip comfort of the device but also provides a more rational spatial layout for internal components, facilitating heat dissipation and structural stability.

[0050] Furthermore, a temperature sensor 4 and a pressure sensor 6 are integrated into the housing 20. The temperature sensor 4 is used to monitor the operating temperature inside the inner cannula 10 in real time to prevent local overheating caused by high-frequency movement, which could affect device performance or cause tissue damage. The pressure sensor 6 is used to detect pressure changes inside the inner cannula 10, assisting in regulating the operating state of the negative pressure system and ensuring the stability and controllability of the tissue suction process.

[0051] A connecting cable 17 and a flexible tube 18 are provided at the rear end of the cutter body 02. The connecting cable 17 is connected to the main unit's electrical control system, thereby powering and controlling the cutter's internal drive motor. The flexible tube 18 is connected to the main unit's negative pressure system, which aspirates tissue fragments and liquid generated during the cutting process and transfers them to a collection bag.

[0052] During the actual surgical procedure, the host computer regulates the negative pressure within the inner lumen of the inner cannula 10 by controlling the start and stop of the negative pressure system. When the negative pressure is activated, soft tissue or vitreous fluid near the incision 11 is drawn into the outer cannula 9. Simultaneously, the host computer controls the motor assembly to drive the inner cannula 10 in high-speed rotational motion and optional axial linear reciprocating motion. At this point, relative motion occurs between the second incisor teeth 15 on the inner cannula 10 and the first incisor teeth 13 on the outer cannula, creating a highly efficient shearing action that severs tissue entering the outer cannula incision area.

[0053] Under the influence of continuous negative pressure, the sheared tissue fragments pass through the interior of the inner cannula 10 and the flexible tube 18, and are ultimately transported to the collection bag provided with the main unit, completing the tissue removal process. The entire operation is carried out under high-precision control, ensuring a stable and efficient cutting action while minimizing damage to healthy tissue surrounding the surgical area.

[0054] In summary, the deep tissue cutter provided in this embodiment achieves the technical advantages of high cutting frequency, low vibration, and safe and reliable operation by optimizing the integrated design of the cutting head structure and the functional module of the main body 2. It is particularly suitable for minimally invasive surgical scenarios such as vitrectomy in ophthalmology.

[0055] It should also be understood that in the embodiments herein, the term "and / or" merely describes an association between associated objects, indicating that three possible relationships exist. For example, "A and / or B" could represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0056] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the composition and steps of each example according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this document.

[0057] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0058] In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices, or units, or can be an electrical, mechanical, or other form of connection.

[0059] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of the embodiments herein.

[0060] Specific embodiments are used in this article to illustrate the principles and implementation methods of this article. The description of the above embodiments is only used to help understand the methods and core ideas of this article. At the same time, for those skilled in the art, based on the ideas of this article, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation to this article.

Claims

1. A deep tissue cutting head, characterized in that: include: The outer sleeve (9) is a tubular structure with a closed bottom surface, and a cutting opening (11) is provided on the side surface. The cutting opening (11) is arranged close to the bottom surface, and at least one first cutting edge is protruded from the inner edge of the cutting opening (11); The axial direction of the first cutting edge is substantially parallel to the wall of the outer sleeve (9); or the end of the first cutting edge points to the inner wall of the outer sleeve (9); An inner sleeve (10) is sleeved inside the outer sleeve (9), the inner sleeve (10) being a hollow tubular structure with both ends open, and a second cutting edge (12) matching the first cutting edge is convexly provided on the bottom surface of the inner sleeve (10) near the outer sleeve (9); The inner sleeve (10) can perform rotation and / or axial linear motion inside the outer sleeve (9) so as to form a shearing effect when the first cutting edge and the second cutting edge (12) come into contact, thereby shearing the tissue in the incision (11).

2. The deep tissue cutting head according to claim 1, characterized in that: The bottom surface of the outer sleeve (9) is a planar structure, and there is an arc-shaped transition between the bottom surface and the side wall of the outer sleeve (9).

3. The deep tissue cutting head according to claim 1, characterized in that: The cutting opening (11) is also provided with at least one first cutting tooth (13); The axial direction of the first cutting tooth (13) is substantially parallel to the wall of the outer sleeve (9); or the tip of the first cutting tooth (13) points to the inner wall of the outer sleeve (9); A third cutting edge (14) is formed at the inner edge of the outer periphery of the first cutting tooth (13), and when the third cutting edge (14) contacts the second cutting edge (12), a shearing action is jointly generated.

4. The deep tissue cutting head according to claim 3, characterized in that: A second cutting tooth (15) is also protrudingly provided on the bottom surface of the inner sleeve (10) near the outer sleeve (9); A fourth cutting edge (16) is formed at the inner edge of the outer periphery of the second cutting tooth (15), and when the fourth cutting edge (16) contacts the first cutting edge and / or the third cutting edge (14), a shearing action is jointly generated.

5. The deep tissue cutting head according to claim 1, characterized in that: The wall thickness of the outer sleeve (9) decreases gradually from the cutting opening (11) to the opening of the outer sleeve (9), and the opening of the outer sleeve (9) is the end portion opposite to the bottom surface.

6. The deep tissue cutting head according to claim 4, characterized in that: The cross-sections of the first cutting edge, the second cutting edge (12), the third cutting edge (14) and / or the fourth cutting edge (16) are streamlined.

7. The deep tissue cutting head according to claim 3, characterized in that: The first cutting teeth (13) are arranged on a side away from the bottom surface.

8. A deep tissue cutter, characterized in that: include: The deep tissue cutting head according to any one of claims 1 to 7, comprising: an outer cannula (9) and an inner cannula (10); A body (2), the outer periphery of the body (2) being connected to the outer sleeve (9); The body (2) comprises: A driving member (8) connected to the inner sleeve (10) to drive the inner sleeve (10) to perform rotation and / or axial linear motion within the outer sleeve (9); A negative pressure tube is connected to one end of the inner sleeve (10).

9. The deep tissue cutter according to claim 8, characterized in that The body (2) further comprises: A housing (20), wherein the outer periphery of the housing (20) is connected to the outer sleeve (9), and the inner cavity of the housing (20) is used to accommodate the driving member (8) and the negative pressure tube; The cross section of the housing (20) gradually increases from an end close to the deep tissue cutting head to an end away from the deep tissue cutting head.

10. The deep tissue cutter according to claim 9, characterized in that A temperature sensor (4) and a pressure sensor (6) are also provided inside the housing (20); The temperature sensor (4) is used to detect the internal temperature of the inner sleeve (10); The pressure sensor (6) is used to detect the internal pressure of the inner sleeve (10).

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