Power-driven channel device for vertebroplasty

Abstract

The invention discloses a power-driven channel device for vertebroplasty, the channel device is composed of a central structure, a sleeve and a clamping device, the central structure and the clamping device are located in the sleeve, the central structure penetrates through the clamping device through a middle through hole of the clamping device, and the clamping device is connected with the side wall of the sleeve. The central structure comprises a grinding head and a rod body, the rear end of the rod body can be externally connected with a power system, the power system drives the central structure, the sleeve and the clamp holder to rotate, and when the reducing area of the clamp holder abuts against the inner wall of the second-class conical pipe of the sleeve, the interior of the clamp holder pressurizes the central structure and is fixedly connected with the clamp holder and the central structure. Therefore, the central structure, the sleeve and the clamping device are connected into a whole, and under the driving of the power system, the channel device which is integrally formed rotates along a planned path at a high speed to grind sclerotin and establish a working channel, so that time and labor are saved, and the establishment efficiency of the working channel is improved.

Description

Technical Field

[0001] The present specification relates to the technical field of medical devices, and in particular to a power-driven channel device for vertebroplasty. Background Art

[0002] Vertebroplasty is the full name of percutaneous vertebroplasty (PVP), which is a technology that injects bone cement into the diseased vertebral body through an artificially established working channel to achieve the purpose of strengthening the vertebral body.

[0003] At present, during vertebroplasty, doctors can establish a working channel through a split vertebroplasty tool, which consists of a cannula and a needle core. During the operation, the doctor first determines the entry position of the split vertebroplasty tool from the skin, then manually pushes the split vertebroplasty tool from the subcutaneous part of the skin through the pedicle into the diseased vertebral body through the determined entry position, and finally, after determining that the split vertebroplasty tool has reached the designated position of the diseased vertebral body, the needle core is pulled out, and bone cement is injected into the designated position of the diseased vertebral body through the working channel formed by the cannula.

[0004] However, since the bone of most diseased vertebrae has been hypertrophic and hardened, it is very difficult and time-consuming to manually push the split vertebroplasty tool into the diseased vertebrae. Therefore, a tool that can save time, labor and establish a working channel more efficiently is an urgent problem to be solved. Summary of the invention

[0005] The present specification provides a power-driven channel device for vertebroplasty to partially solve the above-mentioned problems existing in the prior art.

[0006] This manual adopts the following technical solutions:

[0007] The present specification provides a power-driven channel device for vertebroplasty, the channel device comprising a central structure 1, a sleeve 2 and a clamp 3, the central structure 1 and the clamp 3 are located in the sleeve 2, the central structure 1 passes through the clamp 3 through the middle through hole of the clamp 3, 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 body 12, wherein the grinding head 11 is located at the front end of the rod body 12, and the rear end of the rod body 12 is externally connected to a power system, and 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 conical tube 21, a first cylindrical tube 22, a second type 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 conical tube 21 is the front end of the sleeve 2, and the end of the second cylindrical tube 24 not connected to the second type conical tube 23 is the rear end of the sleeve 2;

[0010] The clamp 3 is a variable diameter structure. When the variable diameter area abuts against the inner wall of the second type conical tube 23, the inside of the clamp 3 applies pressure to the central structure 1, fixedly connecting the clamp 3 and the central structure 1, so that the central structure 1 protrudes from the front port of the sleeve 2.

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

[0012] Optionally, the clamp 3 includes a connecting cap 33, the outer wall of the second cylindrical tube 24 is provided with a thread, the second cylindrical tube 24 is placed in a groove of the connecting cap 33, and is connected to the clamp 3 via the thread on the inner wall of the groove, and 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 a plurality of split bodies 34, the bottom surfaces of the split bodies 34 are connected to the bottom surfaces of the through hole structure 31, and a passage is formed in the middle of the clamping structure 32, and the channel formed by the passage and the through hole enables the central structure 1 to pass through.

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

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

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

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

[0018] Optionally, a clamping ring structure 13 is further provided on the rod body 12;

[0019] The clamping ring structure 13 is used for externally connecting a navigation tracer so that the navigation tracer does not rotate when the rod body 12 rotates.

[0020] Optionally, when the power system drives the central structure 1, the clamp 3 and the sleeve 2 to form a whole whose rotation direction is consistent with the thread direction, the clamp 3, the second type conical tube 23 and the second cylindrical tube 24 are tightly connected.

[0021] Optionally, an external power system rotates the central structure 1, the clamp 3 and the sleeve 2 in a reverse thread direction, and the clamp 3 reduces the pressure on the inner wall of the second type conical tube 23 and the rod body 12, and the clamp 3 and the rod body 12 are withdrawn from the sleeve 2.

[0022] At least one of the above 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 is composed of a central structure, a sleeve and a clamp, wherein the central structure and the clamp are located in the sleeve, and the central structure passes through the clamp through the middle through hole of the clamp, and the clamp is connected to the side wall of the sleeve. The central structure includes a grinding head and a rod body, and the rear end of the rod body can be externally connected to a power system, which drives the central structure, the sleeve and the 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 inside of the clamp pressurizes the central structure to fix the clamp and the central structure. In this way, the central structure, the sleeve and the clamp are connected as a whole. Under the drive of the power system, the channel device composed of the whole rotates at high speed along the planned path to grind the bone to establish a working channel, which saves time and effort and improves the efficiency of establishing the working channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of this specification and constitute a part of this specification. The illustrative embodiments and descriptions of this specification are used to explain this specification and do not constitute an improper limitation on this specification. In the drawings:

[0025] Figure 1 A schematic diagram of a split vertebroplasty tool provided in this specification;

[0026] Figure 2A schematic diagram of a power-driven channelizer for vertebroplasty provided in an embodiment of this specification;

[0027] Figure 3 The corresponding Figure 1 A schematic diagram of the holder of the channel device shown;

[0028] Figure 4 A structural diagram of a clamp having a conical-shaped variable diameter region provided in an embodiment of this specification;

[0029] Figure 5 A structural diagram of a clamp having a wedge-shaped variable diameter region provided in an embodiment of this specification;

[0030] Figure 6 A schematic diagram of a clamp provided in an embodiment of the present specification and a sleeve connected with a toothed slot;

[0031] Figure 7 A schematic diagram of a channel device in which a holder is internally connected to a sleeve provided in an embodiment of this specification;

[0032] Figure 8 A schematic diagram of a channel device in which a holder is internally connected to a sleeve provided in an embodiment of this specification;

[0033] Fig. 9 A schematic diagram of a channel device in which a holder is externally connected to a sleeve provided in an embodiment of this specification;

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

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

[0036] Fig.12 The embodiments of this specification provide corresponding to Figure 4 A left side view of the clamping structure of the clamp shown;

[0037] Fig.13 A structural diagram of a clamp having three parts provided in an embodiment of this specification;

[0038] Fig.14 The embodiments of this specification provide corresponding to Fig.13 A left side view of the clamping structure of the clamp shown;

[0039] Fig.15 A schematic diagram of a channel device with a clamping ring structure provided in an embodiment of this specification. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this specification more clear, the technical solutions of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0041] In traditional vertebroplasty surgery, it is necessary to first determine the local anesthetic injection point through fluoroscopy, inject the anesthetic through the skin and subcutaneous tissue, then determine the entry point of the working channel through the skin again through fluoroscopy, and use a split vertebroplasty tool to enter the diseased vertebra through the skin and subcutaneously from the entry point to establish a working channel for injecting bone cement. Figure 1 A schematic diagram of a split vertebral body shaping tool provided in this specification, such as Figure 1 As shown, the split vertebroplasty 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 operation, the needle core is placed inside the cannula for combined use, and the assembled split vertebroplasty tool is manually pushed in from the entry point until it reaches the designated position of the diseased vertebra, and the needle core of the split vertebroplasty tool is removed, and bone cement is injected into the diseased vertebra from the cannula. However, since the bone of the diseased vertebra has mostly proliferated and hardened, it is very difficult to manually push the split vertebroplasty tool into the diseased vertebra, which is time-consuming and laborious.

[0043] If the hand force is too strong, the needle core of the split vertebroplasty tool can easily pass through the inner wall of the pedicle or even enter the spinal canal, causing damage to the nerves or spinal cord, which increases the difficulty of the operation and requires higher hand stability of the operator. Therefore, in order to ensure the accuracy of the operation and avoid damage to the vertebral body when pushing the split vertebroplasty tool into the diseased vertebra, causing complications, multiple fluoroscopy is required to determine the position of the split vertebroplasty tool during the pushing process, and the patient receives a higher radiation dose.

[0044] In order to at least partially solve the above-mentioned problems, the present specification provides a power-driven channel device for vertebroplasty, which can be connected to an external mechanical power system, and the channel device can be driven by the external power to rotate at high speed to establish a working channel under the skin, so that the channel device can easily grind hard bone to establish a working channel, thereby shortening the operation time and improving the efficiency of establishing the working channel.

[0045] In addition, the channel device may be provided with a clamping ring structure for an external navigation tracer, so that the entry position of the channel device can be grasped 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 there is no need to determine the position of the channel device through fluoroscopy, thereby reducing radiation damage to the patient.

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

[0047] Figure 2 A schematic diagram of a power-driven channelizer for vertebroplasty provided in 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 in the sleeve 2. The central structure 1 passes through the clamp 3 through the middle 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 body 12. The grinding head 11 is connected to the front end of the rod body 12, and the rear end of the rod body 12 is externally connected to a power system to drive the central structure 1, the sleeve 2 and the clamp 3 to rotate. The grinding head 11 grinds the bone while rotating to open a way for establishing a working channel, thereby improving the efficiency of establishing the working channel.

[0050] The present specification does not specifically limit the shape of the grinding head, and it may be a spherical drill bit, a straight drill bit, a flat head drill bit, etc.

[0051] The casing 2 includes: 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. The casing 2 is composed of the first type of conical tube 21, the first cylindrical tube 22, the second type of conical tube 23, and the second cylindrical tube 24 connected in sequence. The first type of conical tube 21 and the second type of conical tube 23 are both reducers. The diameter of the second cylindrical tube 24 is greater 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 casing 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 casing 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 sizes of the grinding head 11 and the small diameter of the first type of conical tube 21 can be set as needed. It is only necessary to ensure that 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 is a variable diameter structure, including a variable diameter area and a non-variable diameter area, and the cross-sectional diameter of the variable diameter area gradually increases from the front end to the rear end. Figure 3 As shown, Figure 3The corresponding Figure 1 The schematic diagram of the holder of the channel device shown in the figure has a diameter-changing area at the front end and a non-diameter-changing area at the rear end. The diameter-changing structure of the holder 3 makes the outer wall of the diameter-changing area of ​​the holder 3 and the inner wall of the second type of conical tube 23 fit more closely when they abut against each other, thereby making the connection between the sleeve 2 and the holder 3 more secure.

[0054] A through hole is left in the middle of the clamp 3, and the central structure 1 can pass through the clamp 3 from the through hole. When the diameter-changing area of ​​the clamp 3 abuts against the inner wall of the second type of conical tube 23, the inside of the clamp 3 presses the central structure 1, and the central structure 1 is fixedly connected to the clamp 3, so that the central structure 1 protrudes from the front end of the sleeve 2. At the same time, the clamp 3 is connected to the side wall of the sleeve 2, that is, the clamp 3 connects the central structure 1, the sleeve 2 and the clamp 3 into a whole.

[0055] The cross-sectional diameter of the variable diameter region of the clamp 3 may be increased in a stepwise manner or in a continuous manner. Figure 2 In the channel device shown, the cross-sectional diameter of the clamp 3 increases stepwise 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, the variable diameter region of the clamp 3 may be a cone-like or wedge-like shape. Figure 4 and Figure 5 As shown, Figure 4 A structural diagram of a clamp having a conical-shaped variable diameter region provided in an embodiment of this specification, Figure 5 A structural diagram of a clamp having a wedge-shaped variable diameter region provided in an embodiment of this specification.

[0057] Specifically, Figure 4 and Figure 5 As shown, the clamp 3 comprises: a through hole structure 31 and a clamping structure 32. The through hole structure 31 is in the shape of a cylinder with a through hole in the middle. The clamping structure 32 is composed of a plurality of split bodies 34, the bottom surface of each split body 34 is connected to the bottom surface of the through hole structure, and a passage is formed in the middle of the clamping structure 32. The passage formed by the connection between the passage and the through hole allows the central structure 1 to pass through.

[0058] In one or more embodiments of the present specification, there is no limitation on the manner in which the clamp 3 and the sleeve 2 are connected. For example, they may 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 matching the toothed groove on the inner wall of the second cylindrical tube 24. When the toothed positions of the toothed groove on the clamp 3 and the toothed groove on the inner wall of the second cylindrical tube 24 are staggered, the clamp 3 can be inserted into the second cylindrical tube 24, so that the clamp 3 is connected to the sleeve 2. Figure 6 As shown, Figure 6 The schematic diagram of a holder and a sleeve connected by a toothed slot provided in an embodiment of the present specification, with the sleeve 2 being the outside and the holder 3 being the inside. Driven by a power system externally connected to the rear end of the rod body 12, the central structure 1, the sleeve 2 and the holder 3 rotate synchronously, and the toothed slot can prevent the holder 3 and the sleeve 2 from rotating relative to each other during the rotation process, so that the direction of travel of the channel device deviates from the planned route and causes damage to the patient.

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

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

[0062] After the central structure 1 passes through the clamp 3, during the process of rotating the clamp 3 in the direction of the thread, the clamp 3 and the sleeve 2 are gradually connected as a whole, and the clamp 3 gradually abuts against the inner wall of the second type of conical tube 23, and 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 body 12, and each of the sub-bodies 34 of the clamping structure 32 fits the rod body 12 more and more closely, so that the clamp 3 is connected to the central structure 1. Therefore, the clamp 3 connects the central structure 1, the sleeve 2 and the clamp 3 as a whole.

[0063] Driven by the power system externally connected to the rear end of the rod body 12, when the rotation direction of the whole composed of the central structure 1, the sleeve 2 and the 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, and the clamp 3 continuously applies pressure to the inner wall of the second type of conical tube 23 and the rod body 12, so that the whole composed of the central structure 1, the sleeve 2 and the clamp 3 is tightly connected. It is ensured that the central structure 1, the sleeve 2 and the clamp 3 jointly establish the working channel along the planned route during the establishment of the working channel, avoiding relative movement between the central structure 1, the sleeve 2 and the clamp 3 when establishing the working channel, thereby increasing the surgical risk.

[0064] When the channel device completes the establishment of the working channel, bone cement can be injected into the diseased vertebra along the working channel, and then the central structure 1, sleeve 2 and clamp 3 connected as a whole are rotated in the direction of the reverse thread under the drive of the power system externally connected to the interface at the rear end of the rod body 12, so that the pressure of the clamp on the inner wall of the second type of conical tube 23 and the rod body 12 is reduced, and the fitting of each branch 34 of the clamping structure 32 to the rod body 12 is relaxed, and the clamp 3 and the rod body 12 can be withdrawn from the sleeve 2. At this time, the sleeve 2 forms a working channel, and bone cement can be injected into the diseased vertebra along the rear port of the sleeve 2.

[0065] The power-driven channel device for vertebroplasty provided in this specification is composed of a central structure, a sleeve and a clamp. The central structure and the clamp are located in the sleeve. The central structure passes through the clamp through the middle through hole of the clamp, and the clamp is connected to the side wall of the sleeve. The central structure includes a grinding head and a rod body. The rear end of the rod body can be externally connected to a power system. The power system drives the central structure, the sleeve and the 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 inside of the clamp pressurizes the central structure to fix the clamp and the central structure. In this way, the central structure, the sleeve and the clamp are connected as a whole. Under the drive of the power system, the channel device composed of the whole rotates at high speed along the planned path to grind the bone to establish a working channel, saving time and effort, and improving the efficiency of establishing the working channel.

[0066] In one or more embodiments of the present specification, the rear end of the clamp 3 includes a connection cap 33, and the connection cap 33 has a through hole in the middle, so that the central structure 1 can pass through the clamp 3 from the through hole. The connection cap 33 has a groove, and the inner wall of the groove is provided with a thread. The diameter of the connection cap 33 is larger than the diameter of the second cylindrical tube 24. The second cylindrical tube 24 is placed in the groove, and the clamp 3 and the second cylindrical tube 24 are connected by threads. That is, the clamp 3 is externally connected to the sleeve 2 by threads. Fig. 9 As shown, Fig. 9 A schematic diagram of a channel device in which a clamp is externally connected to a sleeve according to an embodiment of the present specification.

[0067] It should be noted that the connection cap 33 can be connected to the rear end of the through hole structure 31, and the clamp 3 is composed of the through hole structure 31, the clamping structure 32 and the connection cap 33. Fig.10 As shown, Fig.10 This is a structural diagram of a clamp provided in an embodiment of this specification. The connection cap 33 can also replace the through-hole structure 31 and be directly connected to the rear end of the clamping structure 32, and the clamp 3 is composed of the clamping structure 32 and the connection cap 33. Fig.11 As shown, Fig.11 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 connection cap 33, the groove of the connection cap 33 is in the shape of a cylinder. This specification does not limit the shape of the outer wall of the connection cap 33, which can be a cylinder, a quadrangular prism, a hexagonal prism, etc.

[0069] In one or more embodiments of the present specification, the number of the split bodies 34 constituting the clamping structure 32 in the clamp 3 is two. Figure 4 and Figure 4 The holder shown, Figure 3 The middle diameter reduction area is a conical clamp 3, and Figure 4 The number of the split parts 34 of the clamping structure 32 of the clamping device 3 with a wedge-shaped middle diameter-changing area is two. When the clamping device 3 is rotated along the thread direction, the clamping device 3 abuts against the inner wall of the second conical tube 23, and the pressure of the two split parts 34 of the clamping structure 32 on the central structure 1 increases, and the central structure 1 is tightly clamped by the two split parts 34 of the clamping structure 32.

[0070] like Fig.12 As shown, Fig.12 The embodiments of this specification provide corresponding to Figure 4 The left side view of the clamping structure of the clamp shown in FIG. Figure 4 The viewing angle shown is obtained as the front view. Figure 4 The diameter-changing region shown is a conical-shaped clamp 3, and the diameter-changing region and the non-diameter-changing region have a smooth transition. Figure 5 The diameter-changing region shown is a wedge-shaped clamp 3, and there is a non-smooth transition between the diameter-changing region and the non-diameter-changing region.

[0071] Of course, the number of the split bodies 34 constituting the clamping structure 32 may also be three, four, etc., and this specification does not limit this. Fig.13 and Fig.14 As shown, Fig.13 A structural diagram of a clamp having three parts provided in an embodiment of this specification, Fig.14 The embodiments of this specification provide corresponding to Fig.13 The left side view of the clamping structure of the clamp shown in FIG. Fig.13 The perspective shown is obtained as a front view perspective, and a passage is formed between the three sub-bodies 34 of the clamping structure 32, and the central structure 1 can pass through the passage.

[0072] This specification does not limit 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 with 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 the present specification, the outer wall of the first type of conical tube 21 is 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 along the planned path to grind the bone, open a way to establish a working channel, and lead 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 part of the sleeve 2 to enter the vertebral body smoothly, during the movement of the channel device, the frosted structure of the first type of conical tube 21 further widens the bone channel polished by the grinding head 11, so that the diameter of the working channel matches the diameter of the first cylindrical tube 22, so that the first cylindrical tube 22 can enter.

[0074] Among them, this specification does not limit the frosting process of the outer wall of the first type of conical tube 21. It can be obtained by spraying corundum or quartz sand on the outer surface of the first type of conical tube 21, or by mechanically or manually grinding the outer surface of the first type of conical tube 21 with abrasives such as corundum or quartz sand.

[0075] In the traditional vertebroplasty, the split vertebroplasty tool is manually pushed into the vertebral body. In order to ensure that the split vertebroplasty tool is pushed along the planned path and avoid position deviation causing damage to nerves and organs, multiple fluoroscopy is required to determine the insertion position of the split vertebroplasty tool, which causes the patient to receive more radiation damage. If vertebroplasty is performed under the guidance of a 3D navigation device, the establishment of the working channel can be observed in real time through a navigation tracer. The establishment of the working channel is more accurate, and there is no need to determine the insertion position through fluoroscopy, which greatly reduces the radiation dose received by the patient.

[0076] Therefore, in one or more embodiments of the present specification, the central structure 1 is further provided with a clamping ring structure 13, such as Fig.15 As shown, Fig.15 A schematic diagram of a channel device with a clamping ring structure provided in an embodiment of the present specification. The clamping ring structure 13 is used for an external navigation tracer, and the navigation tracer is clamped on the clamping ring structure 13 to ensure 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 includes a navigation tracer, a navigator and a reference tool. Specifically, the navigation tracer uses infrared light to locate and track the channelizer in 3D space. The navigation tracer has a navigation marker ball and is clamped at the end of the rod body 12. The reference tool is placed not far from the channelizer and records the original position coordinates of the navigation tracer. The navigator uses infrared light to illuminate the measurement space range to illuminate the navigation marker ball on the navigation tracer. The light on the navigation marker ball is reflected to the infrared sensor of the navigator, so that the navigator determines the position coordinates of the navigation marker ball. Since the relative position of the navigation marker ball and the channelizer remains unchanged, the navigator can further determine the position of the channelizer based on the position coordinates of the navigation marker ball.

[0078] During the operation, since the navigation marker ball on the navigation tracer needs to receive the infrared light of the navigator, the navigation marker ball of the navigation tracer needs to face the navigator at all times 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 tracer cannot rotate with the channel device, but needs to adjust its position at all times to ensure that it faces the navigator, so as to accurately position the channel device. The navigation tracer is clamped on the clamping ring structure 13 in a relatively loose manner, and the direction of the navigation tracer can be adjusted as needed during the rotation of the channel device.

[0079] In this way, due to the combination of 3D navigation equipment, there is no need to perform X-ray on the patient during the operation to determine the entry position of the channel device, and the channel device can establish the working channel more accurately. When grinding the bone, it can be ensured to strictly follow the planned path, reducing the patient's radiation dose while reducing the risk of surgery.

[0080] It should be noted that the terms "include", "comprises" or any other variations thereof in this specification are intended to cover non-exclusive inclusion, so that a process, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the commodity or device including the element.

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

[0082] The above description is only an embodiment of the present specification and is not intended to limit the present specification. For those skilled in the art, the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of the claims of the present specification.

Claims

1. A power-driven channel device for vertebroplasty, characterized in that: The channel device comprises a central structure (1), a sleeve (2) and a holder (3); the central structure (1) and the holder (3) are located inside the sleeve (2); the central structure (1) passes through the holder (3) through a middle through hole of the holder (3); the holder (3) is connected to a side wall of the sleeve (2); wherein: The central structure (1) comprises a grinding head (11) and a rod body (12), wherein the grinding head (11) is located at the front end of the rod body (12), and the rear end of the rod body (12) is externally connected to a power system, and 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 conical tube (21), a first cylindrical tube (22), a second type conical tube (23) and a second cylindrical tube (24) connected in sequence; the diameter of the second cylindrical tube (24) is greater than the diameter of the first cylindrical tube (22); the small diameter end of the first type conical tube (21) is the front end of the sleeve (2); and the end of the second cylindrical tube (24) not connected to the second type conical tube (23) is the rear end of the sleeve (2); The clamp (3) is a variable diameter structure. When the variable diameter area abuts against the inner wall of the second type of conical tube (23), the interior of the clamp (3) applies pressure to the central structure (1), thereby fixedly connecting the clamp (3) and the central structure (1), so that the central structure (1) protrudes from the front end of the sleeve (2).

2. The channel device according to claim 1, characterized in that: The outer wall of the holder (3) and the inner wall of the second cylindrical tube (24) are provided with threads, and the holder (3) and the second cylindrical tube (24) are connected with threads.

3. The channel device according to claim 1, characterized in that: The clamp (3) comprises a connecting cap (33), the outer wall of the second cylindrical tube (24) is provided with a thread, the second cylindrical tube (24) is placed in a groove of the connecting cap (33), and is connected to the clamp (3) via the thread on the inner wall of the groove, and the diameter of the connecting cap (33) is greater than the diameter of the second cylindrical tube (24).

4. The channel device as claimed in claim 2 or 3, characterized in that: The clamp (3) comprises a through-hole structure (31) and a clamping structure (32); the clamping structure (32) is composed of a plurality of split bodies (34); the bottom surfaces of the split bodies (34) are connected to the bottom surfaces of the through-hole structure (31); a passage is formed in the middle of the clamping structure (32); the passage and the through-hole are connected to form a channel through which the central structure (1) can pass.

5. The channel device according to claim 4, characterized in that: The variable diameter area at the front end of the clamping structure (32) is quasi-conical, and the central structure (1) passes through the clamp (3) from the through hole. When the clamp (3) is rotated in the threaded direction so that the clamping structure (32) abuts against the inner wall of the second-type conical tube (23), the clamp (3) applies pressure to the rod body (12) and the inner wall of the second-type conical tube (23).

6. The channel device according to claim 4, characterized in that: The diameter-changing region at the front end of the clamping structure (32) is wedge-shaped, and the central structure (1) passes through the clamp (3) from the through hole. When the clamp (3) is rotated in the threaded direction and the clamping structure (32) abuts against the inner wall of the second-type conical tube (23), the clamp (3) applies pressure to the rod body (12) and the inner wall of the second-type conical tube (23).

7. The channel device according to 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 expand the diameter of the working channel opened by the grinding head (11) through the grinding structure of the outer wall, so that the diameter of the working channel matches the diameter of the first cylindrical tube (22).

8. The channel device according to claim 1, characterized in that: The rod body (12) is also provided with a clamping ring structure (13); The clamping ring structure (13) is used for externally connecting a navigation tracer so that the navigation tracer does not rotate when the rod body (12) rotates.

9. The channel device according to claim 5 or 6, characterized in that: When the power system drives the central structure (1), the clamp (3) and the sleeve (2) to form a whole whose rotation direction is consistent with the thread direction, the clamp (3), the second type of conical tube (23) and the second cylindrical tube (24) are tightly connected.

10. The channel device according to claim 5 or 6, characterized in that: The external power system causes the central structure (1), the clamp (3) and the sleeve (2) to rotate in a direction opposite to the thread direction, thereby reducing the pressure of the clamp (3) on the inner wall of the second type of conical tube (23) and the rod body (12), and the clamp (3) and the rod body (12) are withdrawn from the sleeve (2).

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