Passage device for surgery and trigger structure

Abstract

This invention provides a surgical access device and trigger structure, relating to access instruments for neurosurgery. It aims to improve the low operational efficiency of existing surgical access devices. The surgical access device includes: a binding rope and a binding wire. The binding rope is used to wrap around a metal mesh, and the binding wire is used to pass through the binding rope and tighten the binding rope to compress the metal mesh; or the binding wire is used to detach from the binding rope to loosen the binding rope and the metal mesh. In the trigger structure, different first locking parts are used to cooperate with a first engaging part to drive a carriage to slide intermittently relative to the handle, so that a second engaging part cooperates with different second locking parts, thereby locking the sliding carriage at different positions on the handle. The surgical access device achieves the compression and unfolding of the metal mesh by the binding wire passing through or detaching from the binding rope, significantly improving assembly and operational efficiency. In the trigger structure, only the trigger needs to be operated throughout the process, simplifying operation and improving operational efficiency.

Description

Technical Field

[0001] This invention relates to surgical access instruments for neurosurgery, and more specifically, to a surgical access device and trigger structure. Background Technology

[0002] Currently, the main surgical channels in neurosurgery are created by incising the cerebral cortex to form a fistula, or by incising the cerebral cortex and using a retractor to create a channel. Other methods involve incising the cerebral cortex and inserting a fixed-shaped brain retractor, or by incising the cerebral cortex during surgery and inserting an X-ray film through a gloved finger to create a channel. Commonly used surgical instruments include brain retractors and double-layered transparent cannulas. All of these methods and instruments involve cutting and damaging brain tissue, causing damage to brain fibers, blood vessels, and brain function.

[0003] Existing technology provides a channel device that, after being punctured into brain tissue, uses its own elasticity and flexibility to pull the brain tissue apart to form a surgical channel, without cutting the cerebral cortex, thus avoiding damage to brain tissue fibers, blood vessels, and brain function. It truly achieves a minimally invasive surgical cavity, with the actual damage being only damage to the puncture channel.

[0004] However, existing access control devices suffer from low operational efficiency. Summary of the Invention

[0005] The object of the present invention includes, for example, providing a surgical access device that can improve the problem of low operating efficiency of existing surgical access devices.

[0006] The present invention also aims to provide a trigger structure that can improve the problem of low operating efficiency of existing surgical channel devices.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] An embodiment of the present invention provides a surgical access device, comprising: a retractor including a metal mesh for forming a surgical access; a conveyor having an openable channel at its distal end for placing the metal mesh; a binding rope and a binding wire, the binding rope being wound around the metal mesh, the binding wire being passing through the binding rope and tightening the binding rope to compress the metal mesh; or the binding wire being detached from the binding rope to loosen the binding rope and the metal mesh.

[0009] Optionally, binding ropes are used to pass sequentially through multiple mesh openings at the far end of the metal mesh to form multiple loops distributed circumferentially with the metal mesh.

[0010] Optionally: the binding wire is used to pass through multiple loops in sequence and to tighten the binding rope when it is taut.

[0011] Optionally: The conveyor includes a piercing head, the piercing head having a first hole communicating with the channel; when the binding wire is in a straightened state, the distal end of the binding wire is accommodated in the first hole, and the proximal end of the binding wire extends away from the first hole to move under the action of an external force, thereby pulling the binding wire away from the binding rope.

[0012] Optionally, the conveyor also includes a fixing block, which is fixed in the channel and has a limiting hole; the binding wire is used to move through the limiting hole and is limited by the fixing block.

[0013] Optionally, a fixing block is positioned at the far end of the channel and inside the metal mesh to prevent the metal mesh from moving toward the near end of the channel.

[0014] Optionally: the puncture head is provided with a connecting channel and an external injection port; the delivery device also includes a support tube and a Luer connector, the support tube being disposed within the channel, the distal end of the support tube being connected to the puncture head and communicating with the injection port; the Luer connector is connected to the support tube.

[0015] Optionally, the conveyor also includes a retaining ring connected to the binding wire for pulling the binding wire away from the binding rope under external force.

[0016] Optionally, the conveyor also includes a locking part, with a retaining ring for engaging or disengaging from the locking part; when the retaining ring disengages from the locking part, the retaining ring is used to pull the binding wire away from the binding rope under the action of an external force.

[0017] Optionally: the snap-fit ​​portion is cylindrical; the snap ring includes an interconnected semicircular ring and a lever, the semicircular ring being used to snap into or disengage from the outer wall of the snap-fit ​​portion.

[0018] Optionally, the conveyor further includes an outer tube and a trigger structure, the trigger structure including a trolley, a trigger, and a handle; the trigger and the trolley are slidably mounted on the handle, the trolley is connected to the outer tube, and drives the outer tube to move during the sliding of the trolley relative to the handle to open the channel; the trolley is provided with a first engaging part and a second engaging part; the trigger is provided with a first locking part, and there are multiple first locking parts; the handle is provided with a second locking part, and there are multiple second locking parts; different first locking parts are used to cooperate with the first engaging parts to drive the trolley to slide intermittently relative to the handle, so that the second engaging parts cooperate with different second locking parts, thereby locking the sliding trolley at different positions on the handle.

[0019] Optionally: the first locking part is used to lock into the first engaging part when the trigger slides relative to the handle in the first direction, so that the trigger pushes the carriage to slide in the first direction; the first locking part is used to slide into the first engaging part when the trigger slides relative to the handle in the second direction, and when the first locking part and the first engaging part slide into each other, the carriage is fixed relative to the handle; wherein the first direction and the second direction are opposite.

[0020] Optionally, the trigger structure further includes a reset element; the reset element is connected between the trigger and the handle to give the trigger a tendency to slide relative to the handle in a second direction.

[0021] Optionally: the first locking part is a first one-way tooth protruding on the trigger; the second locking part is also a second one-way tooth protruding on the handle.

[0022] Optionally: the first engaging part is a first spring piece, one end of which is connected to the trolley, and the other end of which is used to lock into the first one-way tooth when moving in the first direction and to slide into the first one-way tooth when moving in the second direction; the second engaging part is a second spring piece, one end of which is connected to the trolley, and the other end of which is used to lock into the second one-way tooth when moving in the first direction and to slide into the second one-way tooth when moving in the second direction.

[0023] Embodiments of the present invention also provide a trigger structure, including a carriage, a trigger, and a handle; the trigger and the carriage are slidably disposed on the handle; the carriage is provided with a first engaging portion and a second engaging portion; the trigger is provided with a first locking portion, and the number of first locking portions is multiple; the handle is provided with a second locking portion, and the number of second locking portions is multiple; different first locking portions are used to cooperate with the first engaging portions to drive the carriage to slide intermittently relative to the handle, so that the second engaging portions cooperate with different second locking portions, thereby locking the sliding carriage at different positions on the handle.

[0024] Optionally: the first locking part is used to lock into the first engaging part when the trigger slides relative to the handle in the first direction, so that the trigger pushes the carriage to slide in the first direction; the first locking part is used to slide into the first engaging part when the trigger slides relative to the handle in the second direction, and when the first locking part and the first engaging part slide into each other, the carriage is fixed relative to the handle; wherein the first direction and the second direction are opposite.

[0025] Optionally, the trigger structure further includes a reset element; the reset element is connected between the trigger and the handle to give the trigger a tendency to slide relative to the handle in a second direction.

[0026] Optionally: the first locking part is a first one-way tooth protruding on the trigger; the second locking part is also a second one-way tooth protruding on the handle.

[0027] Optionally: the first engaging part is a first spring piece, one end of which is connected to the trolley, and the other end of which is used to lock into the first one-way tooth when moving in the first direction and to slide into the first one-way tooth when moving in the second direction; the second engaging part is a second spring piece, one end of which is connected to the trolley, and the other end of which is used to lock into the second one-way tooth when moving in the first direction and to slide into the second one-way tooth when moving in the second direction.

[0028] The beneficial effects of the surgical channel device and trigger structure of the present invention include, for example:

[0029] In the surgical access device, the binding cord is flexible and can easily pass through the metal mesh. The binding wire is stiffer than the binding cord. After passing through the binding cord, the binding wire can tighten the binding cord, thereby compressing the metal mesh. After the binding wire detaches from the binding cord, the binding cord quickly unwinds, and the metal mesh returns to its original shape, forming the surgical access. During assembly, the flexible binding cord easily passes through the metal mesh, and the binding wire only needs to pass through the binding cord, simplifying assembly and improving efficiency. In actual surgical procedures, the binding cord only needs to be removed from the binding wire, significantly improving surgical efficiency.

[0030] The trigger structure allows different first locking parts on the trigger to engage with the first engaging parts by sliding the trigger, causing the carriage to slide intermittently. This causes the second engaging part of the carriage to engage with different second locking parts, locking the carriage at different positions on the handle. Throughout the process, only the trigger needs to be operated continuously to fix the carriage at different positions on the handle along the sliding direction. The operation is simple and improves efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of the surgical channel provided in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of the W in the image;

[0034] Figure 3 This is a schematic diagram of the structure of the puller provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the fixing block provided in an embodiment of the present invention;

[0036] Figure 5 This is a partial cross-sectional view of the surgical channel provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the trigger structure provided in an embodiment of the present invention;

[0038] Figure 7This is a first-view structural schematic diagram of the vehicle provided in an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the trigger from a second perspective, provided in an embodiment of the present invention.

[0040] Figure 9 This is a schematic diagram of the structure of the pulling device provided in an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the outer jacket and inner core in the pulling device provided in an embodiment of the present invention.

[0042] Icons: 10-Surgical channel device; 100-Metal mesh; 101-Mesh opening; 110-Conveyor; 111-Channel; 120-Binding rope; 121-Ring hole; 130-Binding wire; 140-Punch head; 141-First hole; 142-Injection port; 150-Fixing block; 151-Limiting hole; 152-Assembly hole; 160-Support tube; 161-Luer connector; 170-Clamping ring ; 171-Semicircular ring; 172-Actuating handle; 180-Outer tube; 20-Trigger structure; 210-Cart; 211-First engaging part; 212-Second engaging part; 220-Trigger; 221-First locking part; 230-Handle; 231-Second locking part; 260-Lock; 250-Spring; 300-Pulling device; 310-Outer sleeve; 320-Inner core; 330-Snap fastener. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0047] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0048] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0049] Existing surgical channel instruments suffer from low operational efficiency. The inventors discovered that the release of the metal mesh used to form the surgical channel is not quick enough. Further research revealed that the method for compressing the metal mesh is complex, hindering its rapid release and impacting operational efficiency. The surgical channel instrument and trigger structure provided in this embodiment improve upon these issues.

[0050] The following is combined Figures 1 to 8 The surgical access device provided in this embodiment will be described in detail.

[0051] Please refer to Figure 1 This embodiment provides a surgical access device 10, including: a retractor, the retractor including a metal mesh 100 for forming a surgical access 111; a conveyor 110, the distal end of the conveyor 110 having an openable access 111 for placing the metal mesh 100; a binding rope 120 and a binding wire 130, the binding rope 120 being used to wrap around the metal mesh 100, the binding wire 130 being used to pass through the binding rope 120 and tighten the binding rope 120 to compress the metal mesh 100; or the binding wire 130 being used to detach from the binding rope 120 to loosen the binding rope 120 and the metal mesh 100.

[0052] It should be noted that, as those skilled in the art will understand, throughout this text, during the use of the surgical access device 10, the front end of the delivery device 110 is used to insert into the brain tissue to guide the front end of the retractor into the brain tissue, while the rear end of the delivery device 110 is operated by the physician. Therefore, relatively speaking, the portion of each component near the front end of the delivery device 110 is called the distal end of that component, and the portion of that component near the rear end of the delivery device 110 is called the proximal end of that component. Specifically, the front end of the delivery device 110 is the distal end of the delivery device 110, and the rear end of the delivery device 110 is the rear end of the delivery device 110.

[0053] Continue to refer to Figure 1The retractor includes a metal mesh 100 woven from a shape-memory alloy material. The retractor can be compressed to a very small diameter and inserted into the brain tissue. After release, it will return to its original designed shape due to its elasticity and shape memory, thus opening the brain tissue and forming a surgical channel 111 required for microscopic / endoscopic treatment. This greatly improves the practicality of microscopic / endoscopic surgery and reduces brain tissue trauma. The retractor's small diameter insertion into the brain tissue reduces the need for cutting the brain tissue. In this embodiment, the retractor, after returning to its original shape, is a hollow cylinder. The retractor also includes a transparent membrane covering the outer surface of the metal mesh 100 to improve the smoothness of the outer surface and further reduce trauma to the brain tissue.

[0054] Continue to refer to Figure 1 The delivery device 110 is used to insert a retractor compressed to a very small diameter into the brain tissue. The channel 111 is openable, and a metal mesh 100 is placed within it. After the channel 111 is opened, the metal mesh 100 is fully exposed and released, forming the surgical channel 111. In this embodiment, the metal mesh 100 is in a compressed state within the channel 111, and returns to its original state after being released when the channel 111 is opened.

[0055] Please continue to refer to Figure 1 In this embodiment, the binding rope 120 can be wound around the metal mesh 100. By tightening the binding rope 120, the metal mesh 100 can be tightened. The binding wire 130 is tightened to the binding rope 120 by passing through it. In this embodiment, by connecting multiple points on the metal mesh 100 and one point on the binding wire 130 with the binding rope 120, and tightening the multiple points to one point, the metal mesh 100 can be compressed.

[0056] Specifically, refer to Figure 3 The binding rope 120 is used to sequentially pass through multiple mesh openings 101 at the distal end of the metal mesh 100 to form multiple loop holes 121 distributed circumferentially with the metal mesh 100. Specifically, the distal end of the metal mesh 100 has multiple mesh openings 101 distributed circumferentially. One end of the binding rope 120 enters from one of the mesh openings 101 and exits from the adjacent mesh opening 101. For two adjacent mesh openings 101, the binding rope 120 passes through in opposite directions, thereby forming a loop hole 121 between two adjacent mesh openings 101. In this embodiment, the two ends of the binding rope 120 are connected end to end. In other embodiments, the two ends of the binding rope 120 can be connected to the metal mesh 100.

[0057] The binding rope 120 can be made of nylon rope or other flexible rope.

[0058] Continue to refer to Figure 3The binding wire 130 is used to pass through multiple loop holes 121 in sequence and to tighten the binding rope 120 when it is straightened. After the far end of the binding wire 130 passes through multiple loop holes 121 in sequence along the circumference, the binding wire 130 is straightened, and the binding ropes 120 that pass through two adjacent mesh holes 101 are both wrapped around the binding wire 130 and gathered together, thereby compressing the metal mesh 100.

[0059] Utilizing the flexibility of the binding rope 120, the metal mesh 100 can be tightened onto the taut binding wire 130. The binding rope 120 is easy to wrap around the metal mesh 100, making assembly simple. Pulling the binding wire 130 away from the binding rope 120 can loosen the binding rope 120 and the metal mesh 100, making the operation simple.

[0060] Please refer to this again. Figure 1 , combined Figure 2 In this embodiment, the conveyor 110 includes a piercing head 140, on which a first hole 141 communicating with the channel 111 is provided; when the binding wire 130 is in a straightened state, the distal end of the binding wire 130 is accommodated in the first hole 141, and the proximal end of the binding wire 130 extends away from the first hole 141 so as to move under the action of external force, thereby pulling the binding wire 130 away from the binding rope 120.

[0061] The puncture tip 140 is used to puncture brain tissue during surgery. Figure 1 The relative positions of the piercing head 140 and the channel 111 are described below. The piercing head 140 is located at the leftmost end of the conveyor 110. From left to right, the piercing head 140 and the channel 111 are arranged sequentially. The right end of the first hole 141 communicates with the channel 111. The distal end of the binding wire 130 passes through the binding rope 120 and extends into the first hole 141. The first hole 141 provides support and limits the binding wire 130, preventing it from moving arbitrarily and keeping the binding rope 120 taut on the binding wire 130, thereby maintaining the compressed state of the metal mesh 100. At the same time, it limits the position of the metal mesh 100, preventing it from moving towards the proximal end of the channel 111. In this embodiment, the first hole 141 is located on the side of the piercing head 140, and the position of the first hole 141 is designed according to the position of the distal end of the binding wire 130 when it is straightened. The left end of the first hole 141 passes through the piercing head 140, or the left end of the first hole 141 is closed.

[0062] Continue to refer to Figure 2In this embodiment, the conveyor 110 further includes a fixing block 150, which is fixed within the channel 111 and has a limiting hole 151. A binding wire 130 is used to move through the limiting hole 151 and is confined within the fixing block 150. Specifically, both ends of the limiting hole 151 are through-holes. A gap exists between the fixing block 150 and the piercing head 140, with the distal end of the metal mesh 100 located within this gap. After the distal end of the binding wire 130 passes through the limiting hole 151, it passes through the binding rope 120, straightens, and extends into the first hole 141. The limiting hole 151 limits the binding wire 130, making it easier to maintain its straight state and reducing the influence of other components on the straightened state of the binding wire 130.

[0063] Continue to refer to Figure 2 In this embodiment, the fixing block 150 is disposed at the distal end of the channel 111 and located inside the metal mesh 100 to prevent the metal mesh 100 from moving toward the proximal end of the channel 111. The metal mesh 100 is fitted around the outer periphery of the fixing block 150. After the distal end of the metal mesh 100 is compressed, the metal mesh 100 is obstructed by the fixing block 150 and cannot move toward the proximal end of the channel 111. The metal mesh 100 is further restricted to the distal end of the channel 111.

[0064] Continue to refer to Figure 2 In this embodiment, the puncture head 140 is provided with a communication channel 111 and an external injection port 142; the delivery device 110 also includes a support tube 160 and a Luer connector 161. The support tube 160 is disposed within the channel 111, and its distal end is connected to the puncture head 140 and communicates with the injection port 142; the Luer connector 161 communicates with the proximal end of the support tube 160 for injecting liquid. Further, the Luer connector 161 communicates with the proximal end of the support tube 160.

[0065] The Luer taper 161 is a standardized micro-volume leak-free connector that connects via a male Luer taper 161 and a matching female Luer taper 161 portion. The Luer taper 161 is used for fluid injection, where fluid enters the support tube 160 and exits through the injection port 142, or for flushing or aspirating cerebrospinal fluid during the insertion of the surgical access device 10 into brain tissue.

[0066] Specifically, refer to Figure 1 The tip of the puncture head 140 is oval-shaped. This helps to push open blood vessels during insertion without severing them. The retractor opens the brain tissue in a flexible, circumferential direction. The force is applied in a circular direction, and the force-bearing area is larger than that of two brain retractors that spread to the sides, thus avoiding the excessive local pressure on the brain tissue that often occurs when using brain retractors.

[0067] The injection port 142 is located in the middle of the puncture head 140, and both ends of the injection port 142 pass through both ends of the puncture head 140. Specifically, the distal end of the support tube 160 is inserted into the puncture head 140 and communicates with the injection port 142.

[0068] Among them, reference Figure 1 The fixing block 150 is fixed to the support tube 160. Specifically, in conjunction with Figure 4 The fixing block 150 is provided with an assembly hole 152, and the limiting hole 151 and the assembly hole 152 are spaced apart. The support tube 160 passes through the assembly hole 152 and is fixed.

[0069] Continue to refer to Figure 2 In this embodiment, the surgical channel 111 instrument also includes an outer tube 180, which is slidably fitted around the outside of the support tube 160, forming a channel 111 between the inner wall of the outer tube 180 and the outer wall of the support tube 160. The circumferential tubular channel 111 provides clear visual exposure, significantly improving the difficulty and control of surgical operations, making the surgery convenient and easy to promote, and can be combined with stereotactic or computer navigation to achieve precise positioning of the surgical area.

[0070] Specifically, the distal end of the outer tube 180 contacts the puncture head 140 to seal the channel 111. A metal mesh 100 is fitted between the support tube 160 and the outer tube 180, with the distal end of the metal mesh 100 compressed and tightened onto the support tube 160. When the outer tube 180 slides relative to the support tube 160, the channel 111 is opened, exposing the metal mesh 100. The metal mesh 100 is released and unfolded under the action of elastic restoring force. After the binding wire 130 is removed, the distal end of the metal mesh 100 is also released and unfolded.

[0071] Refer again Figure 1 In this embodiment, the conveyor 110 further includes a retaining ring 170, which is connected to the binding wire 130 for pulling the binding wire 130 away from the binding rope 120 under external force. After the channel 111 is opened, the external force pulls the retaining ring 170, pulling the binding wire 130 away from the binding rope 120, thus releasing the metal mesh 100. (Continue referring to...) Figure 1 In this embodiment, the conveyor 110 further includes a snap-fit ​​portion, and a retaining ring 170 is used to snap into or disengage from the snap-fit ​​portion. When the retaining ring 170 disengages from the snap-fit ​​portion, it is used to pull the binding wire 130 away from the binding rope 120 under external force. The retaining ring 170 is fixed by snapping into the snap-fit ​​portion. After the channel 111 is opened, the retaining ring 170 is removed, and then the retaining ring 170 and the binding wire 130 are pulled. (Continue referring to...) Figure 1In this embodiment, the locking part is columnar; the locking ring 170 includes a semi-circular ring 171 and a toggle handle 172 connected to each other. The semi-circular ring 171 is used to engage or disengage from the outer wall of the locking part. The engagement and disengagement of the semi-circular ring 171 from the locking part are achieved by the toggle handle 172. Specifically, the toggle handle 172 is circular.

[0072] Continue to refer to Figure 1 In this embodiment, the Luer connector 161 partially forms a snap-fit ​​portion, and the semicircular ring 171 is used to snap or disengage from the outer wall of the Luer connector 161. When the snap ring 170 disengages from the Luer connector 161, the snap ring 170 is used to move under the action of external force to pull the binding wire 130 away from the binding rope 120.

[0073] Specifically, the proximal end of the binding wire 130 is connected to the retaining ring 170.

[0074] The retaining ring 170 includes a first connecting segment extending axially along the Luer connector 161. One end of the first connecting segment is connected to the binding wire 130, and the other end is connected to one end of a semicircular ring 171 extending circumferentially along the Luer connector 161. The retaining ring 170 also includes a second connecting segment, which connects the semicircular ring 171 and the actuating handle 172. The second connecting segment is located in the same plane as the semicircular ring 171 and is arranged along the diametrical direction of the semicircular ring 171. The second connecting segment is perpendicular to the first connecting segment.

[0075] During assembly, the end of the first connecting section furthest from the semicircular ring 171 is connected to the binding wire 130, and the semicircular ring 171 is secured to the Luer connector 161. When it is necessary to remove the binding wire 130, hold the lever 172 to rotate the semicircular ring 171, causing the semicircular ring 171 to disengage from the Luer connector 161. Then, hold the retaining ring 170 and pull the binding wire 130 outward, thereby pulling the binding wire 130 out of the binding rope 120 and releasing the binding rope 120.

[0076] Please refer to Figures 5 to 8 An embodiment of the present invention also provides a trigger structure 20, including a carriage 210, a trigger 220, and a handle 230; the trigger 220 and the carriage 210 are slidably disposed on the handle 230; the carriage 210 is provided with a first engaging portion 211 and a second engaging portion 212; the trigger 220 is provided with a first locking portion 221, and the number of first locking portions 221 is multiple; the handle 230 is provided with a second locking portion 231, and the number of second locking portions 231 is multiple; different first locking portions 221 are used to cooperate with the first engaging portions 211 to drive the carriage 210 to slide intermittently relative to the handle 230, so that the second engaging portions 212 cooperate with different second locking portions 231, thereby locking the sliding carriage 210 at different positions on the handle 230.

[0077] By sliding the trigger 220, different first locking parts 221 on the trigger 220 engage with the first engaging part 211, causing the carriage 210 to slide intermittently. This allows the second engaging part 212 of the carriage 210 to engage with different second locking parts 231, thus locking the carriage 210 at different positions on the handle 230. Throughout the process, only the trigger 220 needs to be continuously operated to fix the carriage 210 at different positions on the handle 230 along the sliding direction. The operation is simple and improves the efficiency of operation.

[0078] Continue to refer to Figure 5 The first locking part 221 is used to lock and engage with the first engaging part 211 when the trigger 220 slides relative to the handle 230 in the first direction, so that the trigger 220 pushes the carriage 210 to slide in the first direction; the first locking part 221 is used to slide and engage with the first engaging part 211 when the trigger 220 slides relative to the handle 230 in the second direction, and when the first locking part 221 and the first engaging part 211 slide and engage, the carriage 210 is fixed relative to the handle 230; wherein, the first direction and the second direction are opposite.

[0079] It should be noted that "first direction" refers to... Figure 5 The direction indicated by the middle arrow A is the "second direction". Figure 5 The direction indicated by the middle arrow B.

[0080] Specifically, when the trigger 220 moves along the first direction, the first locking part 221 engages with the first engaging part 211, and the movement of the trigger 220 along the first direction drives the carriage 210 to move synchronously along the first direction. During the movement of the carriage 210 along the first direction, the second engaging part 212 continuously engages with different second locking parts 231 to lock the carriage 210 in different positions. When the trigger 220 moves along the second direction, the first locking part 221 slides with the first engaging part 211, and the movement of the trigger 220 along the second direction does not affect the movement of the carriage 210, which remains locked to the handle 230. Therefore, the continuous reciprocating movement of the trigger 220 along the first and second directions continuously pushes the carriage 210 to move continuously along the first direction.

[0081] Refer again Figure 5 In this embodiment, the trigger structure 20 further includes a reset member; the reset member is connected between the trigger 220 and the handle 230, so that the trigger 220 has a tendency to slide relative to the handle 230 in a second direction. Specifically, the reset member is a spring 250, one end of the spring 250 is connected to the handle 230, and the other end of the spring 250 is connected to the trigger 220.

[0082] An external force drives the trigger 220 to move in the first direction, thereby causing the carriage 210 to move in the first direction. After the external force is removed, it does not interfere with the fixation of the carriage 210 relative to the handle 230. After the external force is removed, the trigger 220 moves in the second direction under the action of the reset component, and the trigger 220 resets. At this time, an external force is applied again to push the trigger 220 to move in the first direction, thereby causing the carriage 210 to move a certain distance in the first direction. This process of repeatedly pushing the trigger 220 and removing the external force, causing the trigger 220 to move back and forth in the first and second directions, pushes the carriage 210 to continuously move in the second direction.

[0083] Please refer to this again. Figure 5 , combined Figure 6 The first locking part 221 is a first one-way tooth protruding on the trigger 220; the second locking part 231 is also a second one-way tooth protruding on the handle 230.

[0084] When the first one-way tooth of the trigger 220 moves in the first direction, it locks with the first engaging part 211, thereby driving the first engaging part 211 to move. When the first one-way tooth moves in the second direction, it slides with the first engaging part 211 and does not interfere with the first engaging part 211.

[0085] When the second engaging portion 212 of the trolley 210 moves in the first direction, it slides into the second one-way tooth, thus enabling the trolley 210 to move continuously in the first direction. When the second engaging portion 212 of the trolley 210 cannot move in the second direction, it is locked onto the second one-way tooth.

[0086] Please refer to Figure 7 In this embodiment, the first engaging part 211 is a first spring piece. One end of the first spring piece is connected to the trolley 210, and the other end of the first spring piece is used to lock with the first one-way tooth when moving in the first direction and to slide with the first one-way tooth when moving in the second direction.

[0087] Please refer to Figure 8 In this embodiment, the second engaging part 212 is a second spring piece. One end of the second spring piece is connected to the trolley 210, and the other end of the second spring piece is used to lock with the second one-way tooth when moving in the first direction and to slide with the second one-way tooth when moving in the second direction.

[0088] Specifically, in combination Figure 5 ,by Figure 5The relative positions of the trolley 210 and trigger 220 are described below. Both the trolley 210 and trigger 220 are mounted on the handle 230, with the trolley 210 positioned above the trigger 220. A first spring is located at the bottom of the trolley 210, with its proximal end connected to the bottom of the trolley 210 and its distal end forming an angle with the bottom of the trolley 210. A first one-way tooth is positioned along a first direction and is located at the top of the trigger 220. The first one-way tooth is a beveled tooth, tilted upwards and to the right. The distal end of the first spring engages with the first one-way tooth, allowing the first spring to slide relative to the first one-way tooth along the first direction. In a second direction, the first spring is locked to the first one-way tooth and cannot move along the second direction.

[0089] Furthermore, a second spring is disposed on the side of the trolley 210, with its proximal end connected to the side of the trolley 210 and its distal end set at an angle to the side of the trolley 210. A second one-way tooth is disposed within the handle 230 along the first direction and corresponds to the side of the trolley 210. The second one-way tooth is also a beveled tooth, pointing towards the upper right. The distal end of the second spring engages with the second one-way tooth, allowing the second spring to slide relative to the second one-way tooth along the first direction. In the second direction, the second spring and the second one-way tooth are locked, preventing movement along the second direction.

[0090] Please refer to this again. Figure 1 and Figure 5 The conveyor 110 also includes a latch 260; a slide rail is provided on the handle 230, and the carriage 210 is slidably mounted on the slide rail. The handle 230 has two insertion holes, and the slide rail passes between the two insertion holes. A limit handle is provided on the carriage 210. The latch 260 is detachably engaged with the two insertion holes. When the latch 260 is engaged with the two insertion holes, it can abut against the limit handle, preventing the carriage 210 from moving towards the distal end of the conveyor 110. When the latch 260 is disengaged from the insertion holes, the carriage 210 can move along the distal end of the conveyor 110. Therefore, before the trigger 220 drives the carriage 210 to move in the first direction, the latch 260 must be pulled out from under the insertion holes. The latch 260 is mainly for preventing accidental operation.

[0091] Specifically, the latch 260 includes a first locking bar and a second locking bar, which are arranged vertically. One end of the second locking bar is connected to the middle of the first locking bar, and the second locking bar is used to engage with the socket. In actual operation, the operator can insert or release the second locking bar into the socket by holding the first locking bar.

[0092] It should be noted that the term "perpendicular" in this article does not require the angle between the two parts to be exactly 90°. A slight tilt is acceptable; for example, an angle between 88° and 90° is still considered perpendicular. Example: The angle between the first and second locking bars can also be 88°, 89°, etc.

[0093] In addition, in the surgical channel device 10, the trolley 210 is connected to the outer tube 180. As the trolley 210 slides relative to the handle 230, it moves the outer tube 180, opening the channel 111. Specifically, the proximal end of the outer tube 180 is connected to the trolley 210. Further, the proximal end of the outer tube 180 has an internal thread section, and the trolley 210 has an external thread section; the internal and external thread sections are threadedly connected. By moving the trigger 220, the trigger 220 continuously drives the trolley 210 to move along a first direction, causing the outer tube 180 to move along the first direction, opening the channel 111, releasing the metal mesh 100, and forming the surgical channel 111.

[0094] In this embodiment, because the retractor is relatively soft, it cannot be directly manipulated to adjust the direction of the surgical channel 111 during surgery. In this embodiment, the direction of the surgical channel 111 is adjusted using the retractor device 300, which means adjusting the surgical channel 111 established by the metal mesh 100. Specifically, this is achieved by adjusting the direction of the retractor. Specifically, the retractor device 300 is inserted into the metal mesh 100 to adjust its direction.

[0095] Please refer to Figure 9 and Figure 10 The retraction device 300 provided in this embodiment includes a tubular outer sleeve 310 and an inner core 320 with a rounded end. The outer sleeve 310 and the inner core 320 are movably fitted and detachably connected. The rounded end of the inner core 320 protrudes from the outer sleeve 310. The outer sleeve 310 is also provided with a connection structure for connecting to external devices. The outer sleeve 310 and the inner core 320 are locked together by a snap fastener 330. In actual use, the inner core 320 is fitted inside the outer sleeve 310 and fixedly connected by the snap fastener 330. During the process of inserting the outer sleeve 310 and the inner core 320 together into the metal mesh 100, the rounded end of the inner core 320 is used to contact the brain tissue to avoid causing trauma to the brain tissue. Then, the inner core 320 is removed, and the outer sleeve 310 can be rotated according to the direction that needs to be adjusted. After the direction is adjusted to the correct position, the outer sleeve 310 is fixedly connected to the external device through the connection structure, thus completing the adjustment of the surgical channel 111 formed by the metal mesh 100.

[0096] Furthermore, the outer sheath 310 and the inner core 320 are made of PC or similar transparent rigid material, which facilitates observation of the surrounding brain tissue.

[0097] According to the surgical channel device 10 provided in this embodiment, the usage process of the surgical channel device 10 is as follows:

[0098] Step 1: Remove latch 260;

[0099] Step 2: Pull the trigger 220. At this time, the outer tube 180 retracts to the proximal end of the conveyor 110. Pull the trigger 220 repeatedly until the retractor is fully exposed to the outer tube 180. At this time, the proximal end of the retractor opens, and the distal end of the retractor is fixed between the piercing head 140 and the fixing block 150 due to the binding of the binding rope and binding wire 130.

[0100] Step 3: Rotate the retainer 170 to disengage it from the Luer connector 161, then pull the retainer 170 back to remove the binding wire 130 from the puncture head 140, binding rope 120, and fixing block 150. The distal end of the retractor is released. At this time, the retractor is not connected to the support tube 160. Remove the delivery device 110. The retractor returns to its cylindrical shape under its own elasticity and separates from the support tube 160. At this time, remove the delivery device 110. The retractor will form the channel 111 required for the operation.

[0101] According to the surgical access device 10 provided in this embodiment, the surgical method steps for performing surgery using the surgical access device 10 are as follows (taking cerebral hemorrhage as an example):

[0102] 1. For patients with cerebral hemorrhage, after skin preparation, a mark is placed on the head for a head CT or MRI scan.

[0103] 2. Input the inspection data into the computer workstation;

[0104] 3. Confirm the scalp incision site;

[0105] 4. After general anesthesia, routine disinfection and draping are performed;

[0106] 5. Cut the scalp; a straight incision can be made.

[0107] 6. A 3cm diameter free bone flap was created using a drill;

[0108] 7. Incise the dura mater;

[0109] 8. In the avascular area of ​​the dermis, guided by the navigation rod, insert the puncture head 140 of this product and the front end of its connected outer tube 180, precisely entering the hematoma cavity; remove the locking buckle 260, pull the trigger 220, and slowly detach the outer tube 180 from the retractor; initially, the binding rope 120 at the front end of the retractor is fixed to the puncture head 140 by the binding wire 130. As the outer tube 180 slowly detaches from the retractor, the rear of the retractor slowly expands to form the rear end channel 111; after the retractor is completely released (i.e., completely separated from the outer tube 180), rotate the handle 230 to the rear end retaining ring 170, so that it is released from the Luer connector 161; retract the retaining ring 170, so that the binding wire 130 at the front end of the retractor separates from the metal mesh 100, at which point the distal end of the retractor slowly unfolds until the entire retractor is completely released. Remove the delivery device 110 to form a surgical cavity. Hematoma is removed under a microscope / endoscope through this cavity. After hemostasis is satisfactory, the retractor is gently squeezed (the distal end of the metal mesh 100 enters the brain tissue under the delivery of the delivery device 110, while the proximal end of the metal mesh 100 is located outside the brain tissue. At this time, the proximal end of the metal mesh 100 is being gently squeezed). After contraction, it can be pulled out. Quick gauze is then applied under a microscope / endoscope inside the puncture channel.

[0110] 9. The dura mater was sutured tightly;

[0111] 10. Bone flap reduction and titanium strip fixation;

[0112] 11. Suture the layers of the scalp.

[0113] The surgical access device 10 provided in this embodiment has at least the following advantages:

[0114] The metal mesh 100 is compressed using binding rope 120 and binding wire 130. The structure is simple and reliable, and the assembly is simple. During operation, the metal mesh 100 can be released simply by pulling the binding wire 130 away from the binding rope 120. The operation is simple, which improves the efficiency of the operation and reduces the surgical risk.

[0115] The channel 111 is opened by using a trigger mechanism 20, and the outer tube can be retracted by repeatedly operating the trigger 220, which is quick and easy. At the same time, the trigger 220 can be operated with only one hand, further simplifying the operation and improving the efficiency.

[0116] When the latch 260 is inserted into the handle 230, the trigger 220 and the carriage 210 cannot move. During normal operation, the latch 260 must be removed before the trigger 220 can be pulled to retract the outer tube 180. The latch 260 serves to prevent accidental operation of the trigger 220, which could cause the outer tube 180 to retract and the metal mesh 100 to be released unexpectedly.

[0117] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A surgical access device, characterized in that, include: A retractor, the retractor comprising a metal mesh for forming a surgical channel; A conveyor, the distal end of which has an openable channel for placing the metal mesh; Binding rope and binding wire, the binding rope being used to wrap around the metal mesh, the binding wire being used to pass through the binding rope and tighten the binding rope to compress the metal mesh; Alternatively, the binding wire may be used to detach from the binding rope to loosen the binding rope and the metal mesh; The delivery device includes a puncture head, and the puncture head is provided with a first hole communicating with the channel; When the binding wire is straightened, the distal end of the binding wire is accommodated in the first hole, and the proximal end of the binding wire extends away from the first hole so as to move under the action of external force, thereby pulling the binding wire away from the binding rope. The conveyor also includes an outer tube and a trigger structure. The trigger structure includes a trolley, a trigger, and a handle. The trigger and the trolley are slidably mounted on the handle. The trolley is connected to the outer tube. As the trolley slides relative to the handle, it drives the outer tube to move, thereby opening the channel. The trolley is provided with a first engaging part and a second engaging part; the trigger is provided with a first locking part, and there are multiple first locking parts; the handle is provided with a second locking part, and there are multiple second locking parts; Different first locking portions are used to cooperate with the first engaging portion to drive the trolley to slide intermittently relative to the handle, so that the second engaging portion cooperates with different second locking portions, thereby locking the sliding trolley at different positions on the handle.

2. The surgical access device according to claim 1, characterized in that: The binding rope is used to pass sequentially through multiple mesh openings at the far end of the metal mesh to form multiple loop holes distributed circumferentially with the metal mesh.

3. The surgical access device according to claim 2, characterized in that: The binding wire is used to pass through the plurality of loop holes in sequence and to tighten the binding rope when it is straightened.

4. The surgical access device according to claim 1, characterized in that: The conveyor also includes a fixing block, which is fixed inside the channel and is provided with a limiting hole; The binding wire is used to move through the limiting hole and is confined to the fixing block.

5. The surgical access device according to claim 4, characterized in that: The fixing block is disposed at the far end of the channel and inside the metal mesh to prevent the metal mesh from moving toward the near end of the channel.

6. The surgical access device according to claim 1, characterized in that: The puncture head is provided with an injection port that connects the channel to the outside; The delivery device also includes a support tube and a Luer connector. The support tube is disposed within the channel, and the distal end of the support tube is connected to the puncture head and communicates with the injection port. The Luer connector is connected to the support tube.

7. The surgical access device according to claim 1, characterized in that: The conveyor also includes a retaining ring connected to the binding wire for pulling the binding wire away from the binding rope under external force.

8. The surgical access device according to claim 7, characterized in that: The conveyor also includes a locking part, and the locking ring is used to engage or disengage with the locking part; when the locking ring disengages from the locking part, the locking ring is used to pull the binding wire away from the binding rope under the action of external force.

9. The surgical access device according to claim 8, characterized in that: The snap-fit ​​portion is columnar; The retaining ring includes a semi-circular ring and a toggle handle connected to each other, and the semi-circular ring is used to engage or disengage from the outer wall of the retaining part.

10. The surgical access device according to claim 1, characterized in that: The first locking part is used to lock and engage with the first engaging part when the trigger slides relative to the handle in a first direction, so that the trigger pushes the carriage to slide in the first direction. The first locking part is used to slide in cooperation with the first engaging part when the trigger slides relative to the handle in the second direction. When the first locking part slides in cooperation with the first engaging part, the trolley is fixed relative to the handle. The first direction and the second direction are opposite.

11. The surgical access device according to claim 10, characterized in that: The trigger structure also includes a reset component; The reset element is connected between the trigger and the handle to give the trigger a tendency to slide relative to the handle in the second direction.

12. The surgical access device according to claim 11, characterized in that: The first locking part is a first one-way tooth protruding on the trigger; the second locking part is also a second one-way tooth protruding on the handle.

13. The surgical access device according to claim 12, characterized in that: The first engaging part is a first spring piece. One end of the first spring piece is connected to the trolley, and the other end of the first spring piece is used to lock with the first one-way tooth when moving in the first direction and to slide with the first one-way tooth when moving in the second direction. The second engaging part is a second spring piece. One end of the second spring piece is connected to the trolley, and the other end of the second spring piece is used to lock with the second one-way tooth when moving in the first direction and to slide with the second one-way tooth when moving in the second direction.

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