Powered channeler for vertebroplasty

Abstract

The specification discloses a power-driven channeler for vertebroplasty, which is composed of a central structure, a sleeve and a holder, the central structure and the holder being located in the sleeve, the central structure passing through the holder through a middle through hole of the holder, and the holder being connected with a side wall of the sleeve. The central structure comprises a grinding head and a rod body, the rear end of the rod body being externally connected with a power system, the power system driving the central structure, the sleeve and the holder to rotate, when a variable-diameter area of the holder abuts against an inner wall of a second type of conical tube of the sleeve, the interior of the holder pressurizes the central structure, and the holder and the central structure are fixedly connected. In this way, the central structure, the sleeve and the holder are connected as a whole, and under the driving of the power system, the channeler composed of the whole rotates at a high speed along a planned path to grind bone to establish a working channel, time and labor are saved, and the establishment efficiency of the working channel is improved.

Description

Technical Field

[0001] This specification relates to the field of medical device technology, and in particular to a power drive channel device for vertebroplasty. Background Technology

[0002] Vertebroplasty, also known as percutaneous vertebroplasty (PVP), is a technique that involves injecting bone cement into the diseased vertebral body through an artificially created working channel to strengthen the vertebral body.

[0003] Currently, in vertebroplasty, surgeons can establish a working channel using a split-type vertebroplasty tool, which consists of a cannula and a core. During the procedure, the entry point of the split-type vertebroplasty tool through the skin is first determined. Then, the tool is manually pushed subcutaneously through the pedicle into the diseased vertebral body. Finally, after confirming that the tool has reached the designated location within the diseased vertebral body, the core is removed, and bone cement is injected into the designated location through the working channel formed by the cannula.

[0004] However, because the bone in most diseased vertebrae has already hardened and spurred, manually pushing the split-type vertebral body shaping tool into the diseased vertebrae is very difficult, time-consuming, and labor-intensive. Therefore, a tool that can create a working channel more efficiently and effectively, while saving time and effort, is an urgent problem to be solved. Summary of the Invention

[0005] This specification provides a power-driven channel device for vertebroplasty to partially solve the aforementioned problems existing in the prior art.

[0006] The following technical solution is adopted in this specification:

[0007] This specification provides a power-driven channel device for vertebroplasty, the channel device comprising a central structure 1, a sleeve 2, and a clamp 3, wherein the central structure 1 and the clamp 3 are located within the sleeve 2, the central structure 1 passes through the clamp 3 via a central through-hole, and the clamp 3 is connected to the side wall of the sleeve 2; wherein:

[0008] The central structure 1 includes a grinding head 11 and a rod 12. The grinding head 11 is located at the front end of the rod 12, and the rear end of the rod 12 is connected to a power system. The power system drives the central structure 1, the sleeve 2, and the clamp 3 to rotate.

[0009] The sleeve 2 is composed of a first type of conical tube 21, a first cylindrical tube 22, a second type of conical tube 23, and a second cylindrical tube 24 connected in sequence. The diameter of the second cylindrical tube 24 is larger than the diameter of the first cylindrical tube 22. The smaller diameter end of the first type of conical tube 21 is the front port of the sleeve 2, and the end of the second cylindrical tube 24 that is not connected to the second type of conical tube 23 is the rear port of the sleeve 2.

[0010] The clamp 3 has a variable diameter structure. When the variable diameter area abuts against the inner wall of the second type of conical tube 23, the inside of the clamp 3 presses against the central structure 1, fixing the clamp 3 and the central structure 1 together, so that the central structure 1 protrudes from the front port of the sleeve 2.

[0011] Optionally, the outer wall of the clamp 3 and the inner wall of the second cylindrical tube 24 are provided with threads, and the clamp 3 and the second cylindrical tube 24 are connected by threads.

[0012] Optionally, the clamp 3 includes a connecting cap 33, the outer wall of the second cylindrical tube 24 is threaded, the second cylindrical tube 24 is placed in the groove of the connecting cap 33, and is connected to the clamp 3 through the thread on the inner wall of the groove, the diameter of the connecting cap 33 is larger than the diameter of the second cylindrical tube 24.

[0013] Optionally, the clamp 3 includes a through hole structure 31 and a clamping structure 32. The clamping structure 32 is composed of multiple parts 34. The bottom surface of each part 34 is connected to the bottom surface of the through hole structure 31, forming a passage in the middle of the clamping structure 32. The passage and the through hole form a channel that allows the central structure 1 to pass through.

[0014] Optionally, the variable diameter region at the front end of the clamping structure 32 is conical, and the central structure 1 passes through the clamp 3 through the through hole. When the clamp 3 is rotated in the direction of the thread so that the clamping structure 32 abuts against the inner wall of the second conical tube 23, the clamp 3 applies pressure to the rod 12 and the inner wall of the second conical tube 23.

[0015] Optionally, the variable diameter region at the front end of the clamping structure 32 is wedge-shaped, and the central structure 1 passes through the clamp 3 through the through hole. When the clamp 3 is rotated in the direction of the thread, and the clamping structure 32 abuts against the inner wall of the second type of conical tube 23, the clamp 3 applies pressure to the rod 12 and the inner wall of the second type of conical tube 23.

[0016] Optionally, the outer wall of the first type of conical tube 21 has a frosted structure;

[0017] The first type of conical tube 21 is used to enlarge the diameter of the working channel opened by the grinding head 11 through the abrasive structure of the outer wall, so that the diameter of the working channel matches the diameter of the first cylindrical tube 22.

[0018] Optionally, the rod 12 is further provided with a retaining ring structure 13;

[0019] The retaining ring structure 13 is used to connect an external navigation tracker, so that the navigation tracker does not rotate when the rod 12 rotates.

[0020] Optionally, when the rotation direction of the whole consisting of the central structure 1, the clamp 3 and the sleeve 2 driven by the power system is consistent with the direction of the thread, the clamp 3, the second type of conical tube 23 and the second cylindrical tube 24 are tightly connected.

[0021] Optionally, an external power system causes the central structure 1, the clamp 3, and the sleeve 2 to rotate in the reverse thread direction, reducing the pressure of the clamp 3 on the inner wall of the second type of conical tube 23 and the rod 12, and causing the clamp 3 and the rod 12 to retract from the sleeve 2.

[0022] The above-mentioned technical solutions adopted in this specification can achieve the following beneficial effects:

[0023] As can be seen from the above method, the power-driven channel device for vertebroplasty provided in this specification consists of a central structure, a sleeve, and a clamp. The central structure and the clamp are located inside the sleeve. The central structure passes through the clamp through a central through-hole, and the clamp is connected to the side wall of the sleeve. The central structure includes a grinding head and a rod. The rear end of the rod can be connected to an external power system. This power system drives the central structure, sleeve, and clamp to rotate. When the variable-diameter area of ​​the clamp abuts against the inner wall of the second type of conical tube of the sleeve, the interior of the clamp applies pressure to the central structure, fixing the clamp and the central structure together. In this way, the central structure, sleeve, and clamp are connected as a whole. Driven by the power system, this integrated channel device rotates at high speed along the planned path to grind bone and establish a working channel, saving time and effort and improving the efficiency of establishing the working channel. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and are used to explain this specification, but do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of a split-type cone-shaped tool provided in this specification;

[0026] Figure 2A schematic diagram of a power drive channel device for vertebroplasty provided as an embodiment of this specification;

[0027] Figure 3 The corresponding information provided in this specification Figure 1 A schematic diagram of the clamp for the channel device shown;

[0028] Figure 4 A structural diagram of a clamp with a conical-shaped variable diameter region provided in the embodiments of this specification;

[0029] Figure 5 A structural diagram of a clamp with a wedge-shaped variable diameter region provided in the embodiments of this specification;

[0030] Figure 6 This is a schematic diagram illustrating a clamp and a sleeve connected by a toothed groove, as provided in an embodiment of this specification.

[0031] Figure 7 A schematic diagram of a channel device for a clamp connected inside a sleeve, provided as an embodiment of this specification;

[0032] Figure 8 A schematic diagram of a channel device for a clamp connected inside a sleeve, provided as an embodiment of this specification;

[0033] Figure 9 A schematic diagram of a clamp externally connected to a sleeve, provided as an embodiment of this specification;

[0034] Figure 10 A structural diagram of a clamp provided in an embodiment of this specification;

[0035] Figure 11 A structural diagram of a clamp provided in an embodiment of this specification;

[0036] Figure 12 The embodiments provided in this specification correspond to Figure 4 Left view of the clamping structure of the clamp shown;

[0037] Figure 13 A structural diagram of a clamp with three separate parts provided in the embodiments of this specification;

[0038] Figure 14 The embodiments provided in this specification correspond to Figure 13 Left view of the clamping structure of the clamp shown;

[0039] Figure 15 This is a schematic diagram of a channel device with a retaining ring structure provided in an embodiment of this specification. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0041] In traditional vertebroplasty, fluoroscopy is first used to determine the injection point for local anesthetic. The anesthetic is then injected subcutaneously through the skin. Afterward, fluoroscopy is used again to determine the entry point of the working channel in the skin. A split-type vertebroplasty tool is then used to enter the diseased vertebral body through the skin and subcutaneous tissue from this entry point to establish a working channel for injecting bone cement. Figure 1 This is a schematic diagram of a split-type cone-shaped tool provided in this specification, as shown below. Figure 1 As shown, the split-type vertebral shaping tool consists of two parts: a sleeve and a needle core. The outer part is the sleeve, and the inner part is the needle core.

[0042] During the procedure, the needle core is placed inside the cannula and used in combination. The assembled split-type vertebral body shaping tool is then manually pushed in from the entry point until it reaches the designated position on the diseased vertebra. The needle core of the split-type vertebral body shaping tool is then removed, and bone cement is injected into the diseased vertebra through the cannula. However, because the bone of the diseased vertebra is mostly already sclerotic and hyperplastic, manually pushing the split-type vertebral body shaping tool into the diseased vertebra is very difficult, time-consuming, and laborious.

[0043] Excessive force applied to the hands can cause the needle core of the split vertebral body shaping tool to penetrate the inner wall of the pedicle or even enter the spinal canal, damaging nerves or the spinal cord. This increases the difficulty of the surgery and requires a high degree of hand stability from the surgeon. Therefore, to ensure surgical precision and avoid damaging the vertebral body and causing complications when pushing the split vertebral body shaping tool into the affected vertebra, multiple fluoroscopic examinations are required during the insertion process to determine the position of the tool, resulting in a higher radiation dose received by the patient.

[0044] To at least partially solve the above problems, this specification provides a power-driven channel device for vertebroplasty. This channel device can be connected to an external mechanical power system, which drives the channel device to rotate at high speed under external power to create a working channel from under the skin. This allows the channel device to easily grind hard bone to create a working channel, shortening the operation time and improving the efficiency of creating the working channel.

[0045] In addition, the channel device can be equipped with a retaining ring structure for connecting an external navigation tracer, which can monitor the entry position of the channel device in real time during the operation, so that the channel device can establish a working channel strictly according to the planned path. The working channel establishment process is more accurate and no longer requires fluoroscopy to determine the position of the channel device, reducing radiation damage to the patient.

[0046] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0047] Figure 2 This is a schematic diagram of a power drive channel device for vertebroplasty provided as an embodiment of this specification.

[0048] like Figure 2 The channel device shown includes a central structure 1, a sleeve 2, and a clamp 3. The central structure 1 and the clamp 3 are located inside the sleeve 2. The central structure 1 passes through the clamp 3 through the central through hole of the clamp 3. The clamp 3 is connected to the side wall of the sleeve 2.

[0049] The central structure 1 includes a grinding head 11 and a rod 12. The grinding head 11 is connected to the front end of the rod 12, and the rear end of the rod 12 is connected to an external power system to drive the central structure 1, the sleeve 2, and the clamp 3 to rotate. When the grinding head 11 rotates, it grinds bone, opening a path for establishing a working channel and improving the efficiency of establishing the working channel.

[0050] This instruction manual does not specify the shape of the grinding head; it can be a ball drill bit, a straight-tooth drill bit, a flat-head drill bit, etc.

[0051] The sleeve 2 includes: a first type of conical tube 21, a first type of cylindrical tube 22, a second type of conical tube 23, and a second type of cylindrical tube 24. The sleeve 2 is composed of the first type of conical tube 21, the first type of cylindrical tube 22, the second type of conical tube 23, and the second type of cylindrical tube 24 connected sequentially. Both the first type of conical tube 21 and the second type of conical tube 23 are reducing tubes. The diameter of the second type of cylindrical tube 24 is larger than the diameter of the first type of cylindrical tube 22. The smaller diameter end of the first type of conical tube 21 is the front port of the sleeve 2, and the end of the second type of cylindrical tube 24 not connected to the second type of conical tube 23 is the rear port of the sleeve 2.

[0052] To ensure that the central structure can pass through the sleeve, the diameter of the grinding head 11 is smaller than the small diameter of the first type of conical tube 21. The specific size of the grinding head 11 and the small diameter of the first type of conical tube 21 can be set as needed, as long as the grinding head 11 part of the central structure 1 can pass through the front port of the sleeve 2 and protrude from the front port of the sleeve 2.

[0053] The clamp 3 has a variable diameter structure, comprising a variable diameter region and a non-variable diameter region. The cross-sectional diameter of the variable diameter region gradually increases from the front end to the rear end. For example... Figure 3 As shown, Figure 3The corresponding information provided in this specification Figure 1 The schematic diagram of the clamp of the channel device shows that the front end is the variable diameter area and the rear end is the non-variable diameter area. The variable diameter structure of the clamp 3 makes the outer wall of the variable diameter area of ​​the clamp 3 fit more tightly with the inner wall of the second type of conical tube 23, thereby making the connection between the sleeve 2 and the clamp 3 more secure.

[0054] The clamp 3 has a through hole in the middle, allowing the central structure 1 to pass through it. When the diameter-changing area of ​​the clamp 3 abuts against the inner wall of the second type of tapered tube 23, the interior of the clamp 3 applies pressure to the central structure 1, fixing the central structure 1 to the clamp 3 and causing it to protrude from the front end of the sleeve 2. Simultaneously, the clamp 3 connects to the side wall of the sleeve 2, thus integrating the central structure 1, the sleeve 2, and the clamp 3 into a single unit.

[0055] The diameter increase in the cross-sectional area of ​​the variable-diameter region of the clamp 3 can be either a step-like increase or a continuous increase. For example... Figure 2 In the channel device shown, the cross-sectional diameter of the clamp 3 increases in a stepwise manner from the front end to the rear end.

[0056] If the cross-sectional diameter of the variable diameter region of the clamp 3 increases continuously from the front end to the rear end, then the variable diameter region of the clamp 3 can be conical or wedge-shaped. For example... Figure 4 and Figure 5 As shown, Figure 4 This is a structural diagram of a clamp with a conical-shaped variable diameter region, provided in an embodiment of this specification. Figure 5 This is a structural diagram of a clamp with a wedge-shaped variable diameter region, provided as an embodiment of this specification.

[0057] Specifically, such as Figure 4 and Figure 5 As shown, the clamp 3 includes a through-hole structure 31 and a clamping structure 32. The through-hole structure 31 is shaped like a cylinder with a through hole in the middle. The clamping structure 32 is composed of multiple parts 34, the bottom surface of each part 34 is connected to the bottom surface of the through-hole structure, forming a passage in the middle of the clamping structure 32. The passage and the through hole form a channel through which the central structure 1 can pass.

[0058] In one or more embodiments of this specification, the method of connection between the clamp 3 and the sleeve 2 is not limited. For example, they can be connected by a slot or by a thread.

[0059] Specifically, if the clamp 3 is connected to the sleeve 2 by a toothed groove, the inner wall of the second cylindrical tube 24 is provided with a toothed groove, and the outer wall of the clamping structure 32 of the clamp 3 is also provided with a toothed groove that matches the toothed groove on the inner wall of the second cylindrical tube 24. When the toothed groove on the clamp 3 and the toothed groove on the inner wall of the second cylindrical tube 24 are misaligned, the clamp 3 can be inserted into the second cylindrical tube 24, thus connecting the clamp 3 to the sleeve 2. Figure 6 As shown, Figure 6 This is a schematic diagram illustrating a clamp and a sleeve connected by a toothed groove, as provided in an embodiment of this specification. The sleeve 2 is external, and the clamp 3 is internal. Driven by a power system connected to the rear end of the rod 12, the central structure 1, the sleeve 2, and the clamp 3 rotate synchronously. The toothed groove prevents the clamp 3 from rotating relative to the sleeve 2 during rotation, thus preventing the channel device from deviating from its planned path and causing injury to the patient.

[0060] In one or more embodiments of this specification, the outer wall of the clamp 3 and the inner wall of the second cylindrical tube 24 are threaded, and the clamp 3 and the second cylindrical tube 24 are connected by threads. That is, the clamp 3 is threaded into the sleeve 2. Figure 7 and Figure 8 As shown, Figure 7 This is a schematic diagram of a channel device for a clamp connected inside a sleeve, provided in an embodiment of this specification. Figure 8 This is a schematic diagram of a clamp connected to a sleeve, provided as an embodiment of this specification.

[0061] It should be noted that the threads of the clamp 3 may be provided only on the outer wall of the clamping structure 32, or they may be provided on the outer walls of both the clamping structure 32 and the through hole structure 31. The specific thread depth and position are not limited in this specification.

[0062] As the central structure 1 passes through the clamp 3 and the clamp 3 rotates along the thread direction, the clamp 3 gradually connects with the sleeve 2, and the clamp 3 gradually comes into contact with the inner wall of the second type of conical tube 23. The clamping structure 32 applies pressure to the inner wall of the second type of conical tube 23. At the same time, the clamping structure 32 applies pressure to the rod 12, and the various parts 34 of the clamping structure 32 fit more and more tightly with the rod 12, thus connecting the clamp 3 with the central structure 1. Thus, the clamp 3 connects the central structure 1, the sleeve 2, and the clamp 3 into a whole.

[0063] Driven by the power system connected to the rear end of the rod 12, when the rotation direction of the entire assembly consisting of the central structure 1, sleeve 2, and clamp 3 is consistent with the direction of the thread, the clamp 3, the second type of conical tube 23, and the second cylindrical tube 24 are tightly connected. The clamp 3 continuously applies pressure to the inner wall of the second type of conical tube 23 and the rod 12, ensuring that the entire assembly consisting of the central structure 1, sleeve 2, and clamp 3 is tightly connected. This ensures that during the establishment of the working channel, the central structure 1, sleeve 2, and clamp 3 work together along the planned route to establish the working channel, avoiding relative movement between the central structure 1, sleeve 2, and clamp 3 during the establishment of the working channel, which would increase the surgical risk.

[0064] Once the channel device has established its working channel, bone cement can be injected into the diseased vertebral body along this channel. Driven by a power system connected to the interface at the rear end of the rod 12, the central structure 1, sleeve 2, and clamp 3 are rotated in the reverse thread direction. This reduces the pressure of the clamp on the inner wall of the second-type conical tube 23 and the rod 12, loosening the contact between the clamping structure 32 components 34 and the rod 12. The clamp 3 and rod 12 can then be withdrawn from the sleeve 2. At this point, the sleeve 2 forms a working channel, allowing bone cement to be injected into the diseased vertebral body along its rear end.

[0065] The power-driven channel device for vertebroplasty provided in this manual consists of a central structure, a sleeve, and a clamp. The central structure and clamp are located inside the sleeve. The central structure passes through the clamp via a central through-hole, and the clamp is connected to the side wall of the sleeve. The central structure includes a grinding head and a rod. The rear end of the rod can be connected to an external power system. This power system drives the central structure, sleeve, and clamp to rotate. When the variable-diameter area of ​​the clamp abuts against the inner wall of the second-type conical tube of the sleeve, the interior of the clamp applies pressure to the central structure, fixing the clamp and the central structure in place. In this way, the central structure, sleeve, and clamp are connected as a whole. Driven by the power system, this integrated channel device rotates at high speed along a planned path to grind bone and create a working channel, saving time and effort and improving the efficiency of working channel creation.

[0066] In one or more embodiments of this specification, the rear end of the clamp 3 includes a connecting cap 33 with a through hole in the center, allowing the central structure 1 to pass through the clamp 3. The connecting cap 33 also has a groove with threads on its inner wall. The diameter of the connecting cap 33 is larger than the diameter of the second cylindrical tube 24, which is placed in the groove. The clamp 3 and the second cylindrical tube 24 are connected by threads. That is, the clamp 3 is externally threaded onto the sleeve 2. Figure 9 As shown, Figure 9 This is a schematic diagram of a clamp connected to a sleeve, as provided in an embodiment of this specification.

[0067] It should be noted that the connecting cap 33 can be connected to the rear end of the through-hole structure 31, so the clamp 3 consists of the through-hole structure 31, the clamping structure 32, and the connecting cap 33. Figure 10 As shown, Figure 10 This is a structural diagram of a clamp provided in an embodiment of this specification. The connecting cap 33 can also replace the through-hole structure 31 and be directly connected to the rear end of the clamping structure 32, in which case the clamp 3 consists of the clamping structure 32 and the connecting cap 33. Figure 11 As shown, Figure 11 This is a structural diagram of a clamp provided in an embodiment of this specification.

[0068] Since the second cylindrical tube 24 needs to be embedded in the connecting cap 33, the groove shape of the connecting cap 33 is cylindrical. This specification does not limit the shape of the outer wall of the connecting cap 33; it can be a cylinder, a square prism, a hexagonal prism, etc.

[0069] In one or more embodiments of this specification, the number of parts 34 constituting the clamping structure 32 in the clamper 3 is two. For example... Figure 4 and Figure 4 The clamp shown Figure 3 The intermediate diameter region is a conical clamp 3, and Figure 4 The clamping structure 32 of the intermediate diameter variable clamp 3 has two parts 34. When the clamp 3 is rotated in the direction of the thread, the clamp 3 abuts against the inner wall of the second conical tube 23. The pressure of the two parts 34 of the clamping structure 32 on the central structure 1 increases, and the central structure 1 is tightly clamped by the two parts 34 of the clamping structure 32.

[0070] like Figure 12 As shown, Figure 12 The embodiments provided in this specification correspond to Figure 4 The left view of the clamping structure of the clamp shown is a left view of the clamping device. Figure 4 The view shown is obtained from the front view perspective. Figure 4 The variable diameter region shown is a conical clamp 3, with a smooth transition between the variable diameter region and the non-variable diameter region. Figure 5 The variable diameter region shown is a wedge-shaped clamp 3, and the transition between the variable diameter region and the non-variable diameter region is not smooth.

[0071] Of course, the number of components 34 comprising the clamping structure 32 can also be three, four, etc., and this specification does not impose any restrictions on this. Figure 13 and Figure 14 As shown, Figure 13 This is a structural diagram of a gripper with three separate components, provided as an embodiment of this specification. Figure 14 The embodiments provided in this specification correspond to Figure 13 The left view of the clamping structure of the clamp shown is a left view of the clamping device. Figure 13 The view shown is obtained from the front view, and a passage is formed between the three parts 34 of the clamping structure 32, through which the central structure 1 can pass.

[0072] This manual does not restrict the connection method between the clamp 3 and the central structure 1. For example, the clamp 3 can also be connected to the central structure 1 by threads, or a connecting clip can be provided on the clamp 3 to clamp and connect with the central structure 1.

[0073] In one or more embodiments of this specification, the outer wall of the first type of conical tube 21 has a frosted structure. The large-diameter end of the first type of conical tube 21 is connected to the first cylindrical tube 22. Driven by an external power system, the grinding head 11 rotates and grinds bone along a planned path to create a working channel, leading the channel device into the designated position of the diseased vertebral body. Since the diameter of the grinding head 11 is smaller than that of the first cylindrical tube 22, in order to allow the first cylindrical tube 22 portion of the sleeve 2 to smoothly enter the vertebral body, during the movement of the channel device, the frosted structure of the first type of conical tube 21 further widens the bone channel ground by the grinding head 11, so that the diameter of the working channel matches the diameter of the first cylindrical tube 22, thereby allowing the first cylindrical tube 22 to enter.

[0074] This specification does not restrict the sanding process of the outer wall of the first type of conical tube 21. It can be obtained by spraying the outer surface of the first type of conical tube 21 with abrasive such as diamond abrasive or quartz sand, or by mechanically or manually grinding the outer surface of the first type of conical tube 21 with abrasive such as diamond abrasive or quartz sand.

[0075] In traditional vertebroplasty, the manual insertion of a separate vertebroplasty tool into the vertebral body requires multiple fluoroscopic examinations to ensure the tool follows the planned path and avoids misalignment that could damage nerves and organs. This results in significant radiation exposure for the patient. However, if vertebroplasty is performed under 3D navigation guidance, the establishment of the working channel can be observed in real-time via a navigation tracker. This ensures greater precision and eliminates the need for fluoroscopy to determine the insertion position, significantly reducing the radiation dose received by the patient.

[0076] Therefore, in one or more embodiments of this specification, the central structure 1 is further provided with a retaining ring structure 13, such as... Figure 15 As shown, Figure 15 This is a schematic diagram of a channel device with a retaining ring structure provided in an embodiment of this specification. The retaining ring structure 13 is used to connect an external navigation tracer. The navigation tracer is snapped onto the retaining ring structure 13, which ensures that the navigation tracer does not rotate with the channel device during the rotation of the channel device driven by the power system.

[0077] The 3D navigation device comprises a navigation tracker, a navigator, and a reference tool. Specifically, the navigation tracker uses infrared light to locate and track the channel device in 3D space. The tracker has a navigation marker ball attached to the end of the rod 12. The reference tool is placed a short distance from the channel device and records the initial position coordinates of the navigation tracker. The navigator illuminates the measurement space with infrared light to illuminate the navigation marker ball on the tracker. The light from the navigation marker ball is reflected onto the navigator's infrared sensor, allowing the navigator to determine the position coordinates of the navigation marker ball. Since the relative position of the navigation marker ball and the channel device remains unchanged, the navigator can further determine the position of the channel device based on the position coordinates of the navigation marker ball.

[0078] During the procedure, because the navigation marker ball on the navigation tracker needs to receive infrared light from the navigator, it must always be directly facing the navigator to ensure accurate positioning of the channel device. In other words, when the channel device rotates under the drive of the power system, the navigation tracker cannot rotate with it; instead, it needs to constantly adjust its position to ensure it is directly facing the navigator, thus ensuring accurate positioning of the channel device. The navigation tracker is loosely secured to the retaining ring structure 13, allowing it to adjust its direction as needed during the channel device's rotation.

[0079] In this way, by incorporating 3D navigation equipment, it is not necessary to use fluoroscopy on the patient during surgery to determine the entry position of the channel device, and the channel device can establish a more precise working channel. When grinding bone, it can ensure that it moves strictly according to the planned path, reducing the radiation dose received by the patient and lowering the surgical risk.

[0080] It should be noted that the terms "comprising," "including," or any other variations thereof used in this specification are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes said element.

[0081] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0082] The above description is merely an embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of the claims of this specification.

Claims

1. A power-driven channel device for vertebroplasty, characterized in that, The channel device includes a central structure (1), a sleeve (2), and a clamp (3). The central structure (1) and the clamp (3) are located inside the sleeve (2). The central structure (1) passes through the clamp (3) through a central through-hole. The clamp (3) is connected to the side wall of the sleeve (2). The central structure (1) includes a grinding head (11) and a rod (12). The grinding head (11) is located at the front end of the rod (12). The rear end of the rod (12) is connected to a power system. The power system drives the central structure (1), the sleeve (2) and the clamp (3) to rotate. The sleeve (2) is composed of a first type of conical tube (21), a first cylindrical tube (22), a second type of conical tube (23), and a second cylindrical tube (24) connected in sequence. The diameter of the second cylindrical tube (24) is larger than the diameter of the first cylindrical tube (22). The small diameter end of the first type of conical tube (21) is the front port of the sleeve (2), and the end of the second cylindrical tube (24) that is not connected to the second type of conical tube (23) is the rear port of the sleeve (2). The clamp (3) is a variable diameter structure. When the variable diameter structure abuts against the inner wall of the second type of conical tube (23), the inside of the clamp (3) presses against the central structure (1) to fix the clamp (3) and the central structure (1) together, so that the central structure (1) protrudes from the front port of the sleeve (2). The clamp (3) includes a through hole structure (31) and a clamping structure (32). The clamping structure (32) is composed of multiple parts (34). The bottom surface of the parts (34) is connected to the bottom surface of the through hole structure (31), forming a passage in the middle of the clamping structure (32). The passage and the through hole form a channel that allows the central structure (1) to pass through. The outer wall of the clamp (3) and the inner wall of the second cylindrical tube (24) are threaded. The clamp (3) and the second cylindrical tube (24) are connected by threads. When the central structure (1) passes through the channel, the clamp (3) is rotated along the thread direction. Each part (34) of the clamping structure (32) fits against the rod (12) under the pressure of the second type of conical tube (23), so that the clamp (3), the sleeve (2) and the central structure (1) are connected as a whole. The rod (12) is also provided with a retaining ring structure (13), which is used to connect an external navigation tracer so that the navigation tracer does not rotate when the rod (12) rotates; Driven by the power system connected to the rear end of the rod (12), when the central structure (1), the sleeve (2) and the clamp (3) rotate as a whole in the direction of the thread, the clamp (3) continuously applies pressure to the inner wall of the second type of conical tube (23) and the rod (12), so that the whole consisting of the central structure (1), the sleeve (2) and the clamp (3) is tightly connected; when the rod (12) rotates in the direction of the reverse thread under the drive of the power system, the pressure of the clamp (3) on the inner wall of the second type of conical tube (23) and the rod (12) decreases, so that the clamp (3) and the rod (12) can retract from the sleeve (2).

2. The channel device as claimed in claim 1, characterized in that, The diameter-changing area at the front end of the clamping structure (32) is conical. The central structure (1) passes through the clamp (3) through the through hole. When the clamp (3) is rotated in the direction of the thread, so that the clamping structure (32) abuts against the inner wall of the second type of conical tube (23), the clamp (3) applies pressure to the rod (12) and the inner wall of the second type of conical tube (23).

3. The channel device as described in claim 1, characterized in that, The diameter-changing area at the front end of the clamping structure (32) is wedge-shaped. The central structure (1) passes through the clamp (3) through the through hole. When the clamp (3) is rotated in the direction of the thread, the clamping structure (32) abuts against the inner wall of the second type of conical tube (23), and the clamp (3) applies pressure to the rod (12) and the inner wall of the second type of conical tube (23).

4. The channel device as claimed in claim 1, characterized in that, The outer wall of the first type of conical tube (21) is a frosted structure; The first type of conical tube (21) is used to enlarge the diameter of the working channel opened by the grinding head (11) through the frosted structure of the outer wall, so that the diameter of the working channel matches the diameter of the first cylindrical tube (22).

5. The channel device as described in claim 2 or 3, characterized in that, When the power system drives the central structure (1), the clamp (3) and the sleeve (2) to rotate in the same direction as the thread direction, the clamp (3), the second type of conical tube (23) and the second type of cylindrical tube (24) are tightly connected.

6. The channel device as described in claim 2 or 3, characterized in that, The external power system causes the central structure (1), the clamp (3) and the sleeve (2) to rotate in the reverse thread direction, the clamp (3) reduces the pressure on the inner wall of the second type of conical tube (23) and the rod (12), and the clamp (3) and the rod (12) retract out of the sleeve (2).

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