Transperanial endoscopic surgery channel protection device

Abstract

The invention discloses a transperanial endoscopic surgery channel protection device. The transperanial endoscopic surgery channel protection device comprises a conveyor and a sheath net arranged at the front end of the conveyor. The outer sheath tube is of a circumferential multi-piece surrounding type tubular structure and comprises a plurality of tube pieces installed in the arc-shaped grooves, and the tube pieces can independently slide along the corresponding arc-shaped grooves. In the rollback state, all the duct pieces can rollback step by step according to preset groups, so that the friction force between the outer sheathing canal and the sheath net is reduced, and it is ensured that the sheath net is accurately placed at the preset position. According to the invention, the integrated outer sheath tube is improved into a circumferential multi-sheet encircling structure, and is matched with a grouping step-by-step back-off design, so that the radial pressure of the sheath net is greatly dispersed, and the sheath net is accurately placed at a preset position.

Description

Technical Field

[0001] This application relates to the field of cranioscopic technology, specifically to a transcranial endoscopic surgical access protection device. Background Technology

[0002] In transcranial endoscopic surgery, the surgical access protection device is one of the core auxiliary instruments. Its core function is to provide a safe operating channel for the endoscope or surgical instruments, while protecting the fragile soft tissues in the brain and avoiding direct compression or traction damage to the brain tissue during the operation. It can also effectively isolate contaminants such as blood flow and secretions in the brain, reduce lens fogging and surgical infection risks, alleviate the space-occupying effect of the endoscope, and provide the surgeon with a clear and stable surgical field of vision.

[0003] The key component of existing surgical channel protection devices is the protective mesh, which is typically woven from elastic materials such as nickel-titanium wire and stainless steel wire. After heat treatment and shaping, it forms a soft channel structure with high radial support. Its core feature is its excellent adaptability to contraction and expansion, allowing it to adaptively adhere to the brain tissue according to the shape and size of the cranial opening. After expansion, it forms a stable surgical channel, ensuring both the channel's support strength and avoiding rigid damage to brain tissue caused by a rigid channel. Therefore, it is widely used in various transcranial endoscopic surgeries.

[0004] However, in existing technologies, the delivery and release of the sheath mesh rely on an integrated outer sheath: preoperatively, the outer sheath wraps around the sheath mesh and is inserted into a pre-defined position in the brain; during the operation, the sheath mesh is released by retracting the outer sheath, causing it to expand and adhere to the wall. Because the sheath mesh itself has radial expansion force, it adheres tightly to the inner wall of the outer sheath when not released, resulting in significant friction between the two. When the integrated outer sheath is retracted, this friction causes the tip of the sheath mesh to retract synchronously to varying degrees, and the retraction distance cannot be precisely controlled. Ultimately, this results in the sheath mesh not being accurately placed in the ideal position. In particular, the positioning deviation of its tip directly affects the effectiveness of the surgical channel, potentially causing surgical field deviation, insufficient operating space, and even indirectly increasing the risk of brain tissue damage, seriously affecting the precision and safety of the surgery. Summary of the Invention

[0005] In view of the above problems, this application provides a transcranial endoscopic surgical channel protection device to solve the technical problem that the front end of the sheath mesh retracts synchronously with the outer sheath tube, making it impossible to accurately control the placement position of the sheath mesh.

[0006] To achieve the above objectives, this application provides a transcranial endoscopic surgical channel protection device, including a delivery device and a protective net disposed at the front end of the delivery device; the delivery device includes an outer sheath and a support rod, the protective net is sleeved on the support rod, the outer sheath wraps around the outside of the protective net to limit the radial expansion of the protective net and deliver the protective net, and the outer sheath is driven to push and retract by a control unit;

[0007] The outer sheath is a circumferentially multi-piece enclosed tubular structure, including a base with several arc-shaped grooves evenly distributed circumferentially, and several tube segments fitted and installed in each arc-shaped groove. Each tube segment can slide independently along its corresponding arc-shaped groove. In the forward-pushing conveying state, all the tube segments move forward synchronously to wrap the sheath and complete the conveying. In the retraction state, each tube segment can retract step by step in a preset group. The asynchronous retraction in the group includes: individual retraction, synchronous retraction in pairs, or synchronous retraction of multiple segments. By retracting step by step in the group, the friction between the outer sheath and the sheath is reduced, ensuring that the sheath is accurately placed in the preset position.

[0008] Furthermore, the seat is located at the proximal end of the transcranial endoscopic surgical channel protection device, and at least one annular limiting member is provided on the outer side of each of the tube segments. The annular limiting member is fixedly connected only to the corresponding single tube segment and makes limiting contact with the outer wall of the remaining tube segments to restrict the outward deformation of the tube segments under the radial tension of the sheath mesh.

[0009] Furthermore, there are multiple annular limiting members, which are respectively set at different axial positions at the front end and middle of the tube segment. The annular limiting members at different axial positions are fixedly connected to different tube segments. When the corresponding tube segment retracts, the annular limiting member fixed to it retracts synchronously, always maintaining the limiting constraint on the other tube segments that have not retracted.

[0010] Furthermore, it also includes several rigid connecting rods, which are arranged along the axial direction of the base body and are fixedly connected at both ends to the rear end of the segments that need to be retracted synchronously, so that the segments in the same group maintain consistent movement during retraction and realize synchronous retraction of the segments in the same group.

[0011] Furthermore, the number of tube segments is 6, and the 6 tube segments together form a complete cylindrical conveying channel. The base body is provided with 6 arc-shaped grooves with central angles that are adapted to the tube segments.

[0012] Furthermore, the segment retraction method is symmetrical group retraction: first, the first and fourth segments are retracted synchronously, then the second and fifth segments are retracted synchronously, and finally the third and sixth segments are retracted synchronously, to avoid the sheath mesh shifting due to uneven stress.

[0013] Furthermore, the annular limiting member is made of elastic metal material, and its inner diameter is adapted to the outer diameter of the tube segment after it is enclosed, ensuring a fitting and limiting effect without interfering with the sliding of the tube segment.

[0014] Furthermore, the front edge of the tube segment is provided with a smooth transition structure to further reduce the contact friction with the sheath mesh during retraction.

[0015] Furthermore, the base is fixedly connected to the drive structure in the control unit. The drive structure enables the overall forward movement of the tube segments. When the segments retract in groups, the control unit drives the corresponding transmission structure of each group of tube segments to achieve step-by-step actions.

[0016] Unlike existing technologies, the above-mentioned technical solution uses a protective device for the intracranial endoscopic surgical channel, including a conveyor and a protective sheath net disposed at the front end of the conveyor. The outer sheath is a circumferentially multi-piece enclosed tubular structure, including a seat with several arc-shaped grooves evenly distributed circumferentially, and several tube segments fitted and installed in each arc-shaped groove. Each tube segment can slide independently along the corresponding arc-shaped groove. In the forward conveying state of the protective sheath net, all the tube segments move forward synchronously to wrap the protective sheath net and complete the conveying. In the retraction state, each tube segment can retract step by step in a preset group. The asynchronous retraction in the group includes: individual retraction, synchronous retraction in pairs, or synchronous retraction of multiple segments. By retracting step by step in the group, the friction between the outer sheath and the protective sheath net is reduced, ensuring that the protective sheath net is accurately placed in the preset position. In this technical solution, by improving the integrated outer sheath to a circumferential multi-piece enclosed structure, combined with a grouped and step-by-step retraction design, the radial pressure of the sheath mesh is significantly dispersed, effectively reducing the friction between the outer sheath and the sheath mesh. This completely solves the problem of displacement of the sheath mesh as the outer sheath retracts in existing technologies, ensuring that the sheath mesh (especially the front end) can be accurately placed in the preset position. Furthermore, the annular limiting component retracts synchronously with the corresponding tube segments, always maintaining the limiting constraint on the unretracted tube segments, preventing outward deformation of the tube segments due to the radial tension of the sheath mesh, and ensuring the stability of the surgical operation channel. The symmetrical grouped retraction mode combined with the rigid connecting rod simplifies the operation process, avoids displacement caused by uneven force on the sheath mesh, and is compatible with the control logic of existing devices, requiring no major modifications.

[0017] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0018] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of the present invention and other related contents, and should not be considered as limitations on this application.

[0019] In the accompanying drawings of the instruction manual:

[0020] Figure 1 This is a schematic diagram of the structure of the transcranial endoscopic surgical channel protection device described in a specific embodiment;

[0021] Figure 2 This is a partial cross-sectional view of the conveyor described in a specific embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the multi-piece enclosed outer sheath tube described in a specific embodiment;

[0023] Figure 4 This is a schematic diagram of the structure of the seat of the outer sheath tube according to a specific embodiment;

[0024] Figure 5 This is a schematic diagram illustrating the step-by-step retraction process of the outer sheath tube as described in the specific implementation method;

[0025] Figure 6 This is a schematic diagram illustrating the step-by-step retraction process of the outer sheath tube as described in the specific implementation method;

[0026] The reference numerals used in the above figures are explained as follows:

[0027] 1. Main body; 11. Paddle 1; 12. Paddle 2; 13. Paddle 3; 2. Conveyor; 3. Sheath net; 21. Support rod; 22. Outer sheath tube; 211. Tip; 221. Seat; 222. Tube segment; 223. Annular limiting component; 2211. Slide groove; Detailed Implementation

[0028] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended only as examples, not as limiting the scope of protection of this application.

[0029] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0030] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0031] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0032] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0033] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0034] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0035] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0036] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0037] Please see Figures 1 to 6 This embodiment provides a protective device for the transcranial endoscopic surgical channel. For example... Figure 1 and Figure 2 As shown, the transcranial endoscopic surgical access protection device includes a main body 1, which comprises a delivery device 2 and a protective mesh 3. The delivery device 2 includes a support rod 21 and an outer sheath 22. The support rod 21 has a tip 211 at its front end, which assists the device in entering the cranial opening. The protective mesh 3 is fitted over the outside of the support rod 21. The protective mesh 3 is woven from an elastic material and has radial expansion capability, allowing it to conform to the surgical wall and form a surgical channel.

[0038] like Figure 3 As shown, the outer sheath 22 has a circumferentially multi-piece enclosed structure, and its core components are the base 221 and multiple segments 222 (for example, there can be 4, 6 or 8 segments): Figure 4 As shown, the base 221 has a number of arc-shaped grooves 2211 evenly distributed around its circumference, and each groove 2211 is fitted with a tube segment 222. When all the tube segments 222 are joined together, they form a complete cylindrical channel that can wrap the sheath net 3 for conveying. The tube segments 222 can slide independently along their corresponding grooves 2211. In the forward conveying state, all the tube segments 222 move forward synchronously to wrap the sheath net and complete the conveying. In the retraction state, each tube segment 222 can retract in steps according to a preset group. This asynchronous group retraction includes: individual retraction, synchronous retraction in pairs, or synchronous retraction of multiple segments. By retracting in steps in groups, the friction between the outer sheath tube 22 and the sheath net 3 is reduced, ensuring that the sheath net 3 is accurately placed in the preset position.

[0039] like Figure 3 As shown, multiple annular limiting members 223 are provided on the outer side of the tube segment 222. For example, an annular limiting member 223 is fixed at the front end of one tube segment 222, and another annular limiting member 223 is fixed in the middle of another tube segment 222. The annular limiting member 223 is made of elastic metal, and its inner diameter is adapted to the outer diameter of the tube segment 222 after being enclosed. It is fixedly connected only to the corresponding tube segment 222 and makes limiting contact with the outer wall of the other tube segments 222.

[0040] The segments 222 that need to be retracted synchronously (such as segment 1 and segment 4, segment 2 and segment 5) are fixedly connected by rigid connecting rods arranged along the axial direction of the base 221; the base 221 is provided with corresponding clearance grooves to avoid interference between the connecting rods and the base 221.

[0041] like Figure 1 As shown, the control unit of the main body 1 is equipped with a first lever 11, a second lever 12, and a third lever 13, which respectively drive different groups of tube segments 222: the first lever 11 is associated with tube segment 1 and tube segment 4, the second lever 12 is associated with tube segment 2 and tube segment 5, and the third lever 13 is associated with tube segment 3 and tube segment 6.

[0042] The operation procedure of this transcranial endoscopic surgical access protection device is as follows:

[0043] During the preoperative delivery stage: the sheath net 3 is placed on the outside of the support rod 21, and the control unit drives the seat 221 to push the 6 tube segments 222 forward synchronously along the slide groove 2211 so that all the tube segments 222 surround and wrap the sheath net 3; then, with the assistance of the tip 211 at the front end of the support rod 21, the device is sent into the preset surgical position in the cranium.

[0044] like Figure 3 , Figure 5 and Figure 6 As shown, intraoperative grouping regression phase

[0045] When the device reaches the preset position and the sheath needs to be released, the tube segment 222 is driven to retract in stages via the lever of the control unit:

[0046] Step 1: Operate the lever 11 to drive the tube segment 1 and tube segment 4 to retract synchronously along the slide groove 2211 through the transmission structure; at this time, the front end annular limiting member 223 fixed with the tube segment 1 retracts synchronously with the tube segment 1, and still maintains limiting contact with the outer wall of the remaining tube segments 222 that have not retracted, so as to prevent these tube segments 222 from deforming outward due to the radial tension of the sheath mesh 3.

[0047] Step 2: Operate the second lever 12 to drive the second and fifth segments of the tube to retract synchronously; the central annular limiting member 223, which is fixed to the second segment, retracts synchronously with the second segment, continuously restraining the remaining segments 222 that have not retracted.

[0048] Step 3: Operate the pry bar 313 to drive the tube segment 3 and tube segment 6 to retract synchronously, completing the entire retraction of the outer sheath tube 22, and the sheath mesh 3 fully expands and adheres to the wall to form a surgical channel.

[0049] Compared to existing integrated outer sheath tubes where the friction between the sheath mesh and the inner wall of the outer sheath tube is concentrated during retraction, easily causing displacement of the sheath mesh, this device uses multiple tube segments 222 to retract in groups, retracting only a portion of the tube segments at a time, such as two tube segments. This disperses the radial pressure of the sheath mesh 3, significantly reducing the friction between the tube segments 222 and the sheath mesh 3. Therefore, the sheath mesh 3 will not shift with the retraction of the tube segments 222, ensuring that its front end is accurately placed in the preset position.

[0050] Furthermore, in this embodiment, during the synchronous retraction of the corresponding tube segment 222, the annular limiting member 223 always maintains limiting contact with the tube segment 222 that has not retracted, which can effectively limit the outward deformation of the tube segment 222 due to the radial tension of the sheath mesh 3, avoid instability of the surgical channel, and ensure the operator's operating space.

[0051] In this embodiment, by using the lever to retract the symmetrically grouped segments 222 (segments one and four, two and five, three and six), the force on the sheath net 3 is always kept symmetrical and uniform, avoiding the offset of the sheath net 3 caused by unilateral force, and further improving the placement accuracy.

[0052] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A transcranial endoscopic surgical access protection device, characterized in that, It includes a conveyor and a protective net disposed at the front end of the conveyor; the conveyor includes an outer sheath tube and a support rod, the protective net is sleeved on the support rod, the outer sheath tube wraps around the outside of the protective net to limit the radial expansion of the protective net and convey the protective net, and the outer sheath tube is driven to push and retract by a control unit; The outer sheath is a circumferentially multi-piece enclosed tubular structure, including a base with several arc-shaped grooves evenly distributed along the circumference, and several tube segments fitted and installed in each arc-shaped groove. Each tube segment can slide independently along the corresponding arc-shaped groove. When the sheath is being pushed forward to convey the protective net, all the tube segments move forward synchronously to wrap the protective net and complete the conveying. In the retraction state, each segment can retract step by step according to a preset group. The asynchronous retraction in the group includes: individual retraction, synchronous retraction in pairs, or synchronous retraction of multiple segments. By retracting step by step in the group, the friction between the outer sheath tube and the protective mesh is reduced, ensuring that the protective mesh is accurately placed in the preset position.

2. The transcranial endoscopic surgical access protection device according to claim 1, characterized in that, The seat is located at the proximal end of the transcranial endoscopic surgical channel protection device. Each of the tube segments has at least one annular limiting member on its outer side. The annular limiting member is fixedly connected only to the corresponding single tube segment and makes limiting contact with the outer wall of the remaining tube segments to restrict the outward deformation of the tube segments under the radial tension of the sheath mesh.

3. The transcranial endoscopic surgical access protection device according to claim 2, characterized in that, The annular limiting components are multiple and are respectively set at different axial positions at the front end and middle of the tube segment. The annular limiting components at different axial positions are fixedly connected to different tube segments. When the corresponding tube segment retracts, the annular limiting component fixed to it retracts synchronously, always maintaining the limiting constraint on the other tube segments that have not retracted.

4. The transcranial endoscopic surgical access protection device according to claim 1, characterized in that, It also includes several rigid connecting rods, which are arranged along the axial direction of the base body and are fixedly connected at both ends to the rear end of the segments that need to be retracted synchronously, so that the segments in the same group maintain consistent movement during retraction and realize synchronous retraction of the segments in the same group.

5. The transcranial endoscopic surgical access protection device according to claim 1, characterized in that, The number of tube segments is 6, and the 6 tube segments together form a complete cylindrical conveying channel. The base body is provided with 6 arc-shaped grooves with central angles that are adapted to the tube segments.

6. The transcranial endoscopic surgical access protection device according to claim 5, characterized in that, The segment retraction method is symmetrical group retraction: first, the first and fourth segments are retracted synchronously, then the second and fifth segments are retracted synchronously, and finally the third and sixth segments are retracted synchronously to avoid the sheath mesh shifting due to uneven stress.

7. The transcranial endoscopic surgical access protection device according to claim 2, characterized in that, The annular limiting component is made of elastic metal material, and its inner diameter is adapted to the outer diameter of the tube segment after it is enclosed, ensuring a fitting and limiting effect without interfering with the sliding of the tube segment.

8. The transcranial endoscopic surgical access protection device according to claim 1, characterized in that, The front edge of the tube segment has a smooth transition structure to further reduce the contact friction with the sheath mesh during retraction.

9. The transcranial endoscopic surgical access protection device according to claim 1, characterized in that, The base is fixedly connected to the drive structure in the control unit. The drive structure enables the overall forward movement of the tube segments. When the tube segments are retracted in groups, the control unit drives the corresponding transmission structure of each group of tube segments to achieve step-by-step action.

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