Proximal femur cancellous bone taking and grafting device

Abstract

The invention provides a proximal femur cancellous bone taking and grafting device, and belongs to the technical field of medical instruments. Comprising a femoral head X and a cancellous bone taking area Y at the far end of the femoral head, the bone taking and grafting device comprises an outer pipe fitting, the outer pipe fitting comprises a lower sleeve and an upper sleeve, a connecting mechanism is arranged between the lower sleeve and the upper sleeve, and the connecting mechanism enables the angle between the lower sleeve and the upper sleeve to be adjustable. The central axis of the lower sleeve is arranged in the Y direction of the bone taking area to the X direction of the femoral head, the lower sleeve is implanted into the femoral body to establish a bone taking and grafting channel, the lower sleeve, the upper sleeve, the inner pipe fitting and the connecting mechanism are matched with one another to achieve bone taking and grafting operation, instruments do not need to be replaced in the bone taking and grafting process, and operation is convenient; in other words, the inner pipe can simultaneously penetrate through the upper sleeve and the insertion opening piece to reach the bone taking area Y for bone taking, or the inner pipe can simultaneously penetrate through the lower sleeve and the upper sleeve to reach the interior of the femoral head X for bone grafting.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and more particularly to a proximal femoral cancellous bone harvesting and implanting device. Background Art

[0002] After ischemic necrosis of the femoral head occurs, a 3-4 mm wide dense bone can be formed in the reactive new bone layer around the necrotic area. This layer of bone seals the bone marrow space, making it difficult for new blood vessels to grow in, and becomes a barrier to repair. Only by opening or removing this barrier can the femoral head regain blood supply. In order to promote the repair of the necrotic area of ​​the femoral head, vascular bundles and cancellous bone transplantation can be used to treat ischemic necrosis of the femoral head.

[0003] There are many existing femoral bone harvesting and bone grafting instruments. Each instrument is used for bone harvesting and bone grafting. The instruments are not universal when bone grafting and bone harvesting. They need to be constantly replaced during use, which is quite troublesome to cooperate during the operation and wastes operation time. Therefore, a proximal femoral cancellous bone harvesting and bone grafting instrument is proposed. Summary of the invention

[0004] In view of the problem that there are many femoral bone harvesting and bone grafting instruments in the prior art, and that separate instruments are required for bone harvesting and bone grafting, and that the instruments cannot be interchangeable during bone grafting and bone harvesting and need to be constantly replaced during use, which is quite troublesome to cooperate during surgery and wastes surgical time. The purpose of the present invention is to provide a proximal femoral cancellous bone harvesting and bone grafting instrument.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A proximal femoral cancellous bone grafting device, wherein the femoral body comprises a femoral head X and a cancellous bone grafting area Y at the distal end of the femoral head, the bone grafting device comprises an outer tube, the outer tube comprises a lower sleeve and an upper sleeve, a connecting mechanism is arranged between the lower sleeve and the upper sleeve, the connecting mechanism enables the angle between the lower sleeve and the upper sleeve to be adjustable, the central axis of the lower sleeve is arranged along the bone grafting area Y toward the femoral head X, the lower sleeve is implanted into the femoral body to establish a bone grafting channel, one end of the lower sleeve away from the femoral head X protrudes to the outside of the femoral body, a socket is provided on the side wall of the lower sleeve, and when the lower sleeve is implanted into the femoral body, the socket is located in the bone grafting area Y;

[0007] The bone harvesting and implanting device further comprises an inner tube, which can simultaneously pass through the upper sleeve and the socket to reach the bone harvesting area Y, and can simultaneously pass through the lower sleeve and the upper sleeve to reach the interior of the femoral head X.

[0008] Optionally, an annular drill bit is provided at the feed end of the lower casing and the inner pipe.

[0009] Optionally, the socket member is a plurality of groups of sockets adapted to the inner pipe member, and the sockets are distributed in a linear array along the axis direction of the lower casing.

[0010] Optionally, the socket piece is an independent socket, the length of the socket piece along the axis of the lower casing is greater than the diameter of the inner pipe piece, and the length of the socket piece perpendicular to the axis of the lower casing is greater than or equal to the diameter of the inner pipe piece.

[0011] Optionally, it also includes an adjusting mechanism, which includes a slide and a rod, one end of the slide is fixedly connected to the upper sleeve, the other end of the slide and the rod are rotatably connected through a rotating joint, a side opening is opened on the side wall of the slide, a gear is rotatably installed inside the side opening, a support plate is fixedly connected to the surface of the gear, the support plate is located outside the slide, a tooth plate is installed inside the slide, the tooth plate is meshed with the gear, an adjusting plate is fixedly connected to the surface of the tooth plate, one end of the adjusting plate passes through the outside of the slide and is rotatably connected to a screw, one end of the screw is inserted into the inside of the slide.

[0012] Optionally, the connecting mechanism includes a connecting hose, an annular connecting plate and a connecting head. Both ends of the connecting hose are fixedly connected to annular connecting plates, and the surfaces of two groups of annular connecting plates are fixedly connected to protruding connecting heads. The connecting ends of the lower sleeve and the upper sleeve and the outer surfaces of the connecting head are provided with matching connecting threads, and the lower sleeve and the upper sleeve are both threadedly connected to the connecting head.

[0013] Optionally, a limiting mechanism is further provided between the lower sleeve and the upper sleeve, and the limiting mechanism can connect the lower sleeve and the upper sleeve so that the lower sleeve and the upper sleeve deflect synchronously.

[0014] Optionally, the limiting mechanism includes a connecting rod, an annular plate, a spring and an electromagnet, a groove body is opened inside the side wall of the upper sleeve, the groove body separates the upper sleeve into a double-layer structure, the groove body is set to an open shape at one end close to the lower sleeve, the annular plate is installed in the groove body, and multiple groups of connecting rods are fixedly connected to the surface of the annular plate, the annular connecting plate and the connecting hose are both provided with slots adapted to the connecting rod, and the connecting end of the lower sleeve is provided with a limiting groove adapted to the connecting rod, and a moving part is arranged inside the groove body, and the moving part can drive the annular plate and the connecting rod to move, so that one end of the connecting rod moves into the limiting groove through the slot.

[0015] Optionally, the moving part includes a spring fixedly mounted on the surface of the annular plate, the spring is sleeved inside the groove body, and an electromagnet is fixedly connected to the closed end of the inner surface of the groove body. The annular plate is magnetic, and the electromagnet can attract the annular plate when energized, so that the connecting rod moves out of the limit groove and the slot.

[0016] Optionally, handles are fixedly connected to both sides of the outer surface of one end of the inner tube away from the annular drill bit, and the upper sleeve and the end of the inner tube away from the annular drill bit are provided with matching thread structures.

[0017] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0018] In the above scheme, the lower sleeve, upper sleeve, inner tube and connecting mechanism cooperate with each other to realize bone removal and bone grafting operations, without the need to replace instruments during the bone removal and bone grafting process, which facilitates operation; that is, the inner tube can be passed through the upper sleeve and the socket at the same time to reach the bone removal area Y for bone removal, or the inner tube can be passed through the lower sleeve and the upper sleeve at the same time to reach the inside of the femoral head X for bone grafting.

[0019] The bone harvesting angle of the inner tube can be changed by changing the insertion site of the inner tube, so that it can be flexibly adjusted according to the cancellous bone conditions of different patients.

[0020] By setting a connecting head, the annular connecting plates on both sides of the hose can be connected to the lower sleeve and the upper sleeve respectively with threads, and a bendable connecting hose is formed between the lower sleeve and the upper sleeve, so that the angle between the lower sleeve and the upper sleeve can be adjusted as needed.

[0021] By providing a limiting mechanism, the lower sleeve can be rotated by rotating the upper sleeve, so that the position of the socket piece on the surface of the lower sleeve can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the present invention when implanted into a femoral body;

[0025] Figure 3 For the present invention Figure 1 A cross-sectional view of

[0026] Figure 4 It is a schematic diagram of the structure of multiple groups of jacks of the present invention;

[0027] Figure 5 It is a structural schematic diagram of a separate jack of the present invention;

[0028] Figure 6 For the present invention Figure 3 Schematic diagram of the structure of the part;

[0029] Figure 7 For the present invention Figure 6 The enlarged view of point A in the middle;

[0030] Figure 8 It is a structural schematic diagram of the connection mechanism of the present invention;

[0031] Fig. 9 is a cross-sectional view of the connecting mechanism of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the regulating mechanism of the present invention;

[0033] Fig.11 is a cross-sectional view of the adjustment mechanism of the present invention;

[0034] Fig.12 It is a schematic diagram of the structure of the regulating mechanism of the present invention when it is unfolded.

[0035] [Reference Signs]

[0036] 1. Outer pipe fittings; 11. Lower casing; 12. Upper casing; 13. Socket fittings;

[0037] 2. Ring drill bit;

[0038] 3. Internal pipe fittings;

[0039] 4. Handle;

[0040] 5. Connecting mechanism; 51. Connecting hose; 52. Annular connecting plate; 53. Connecting head; 54. Connecting thread;

[0041] 6. Limiting mechanism; 61. Connecting rod; 62. Ring plate; 63. Spring; 64. Electromagnet; 65. Limiting groove; 66. Groove body; 67. Slot.

[0042] 7. Adjusting mechanism; 71. Sliding seat; 72. Rod; 73. Screw; 74. Adjusting plate; 75. Support plate; 76. Tooth plate; 77. Gear.

[0043] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0044] The following is a detailed description of a proximal femoral cancellous bone grafting device provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0045] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0046] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0047] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0048] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0049] like Figures 1 to 3As shown, an embodiment of the present invention provides a proximal femoral cancellous bone bone grafting device, the femoral body includes a femoral head X and a cancellous bone grafting area Y at the distal end of the femoral head, the bone grafting device includes an outer tube 1, the outer tube 1 includes a lower sleeve 11 and an upper sleeve 12, a connecting mechanism 5 is arranged between the lower sleeve 11 and the upper sleeve 12, the connecting mechanism 5 makes the angle between the lower sleeve 11 and the upper sleeve 12 adjustable, the central axis of the lower sleeve 11 is arranged along the bone grafting area Y toward the femoral head X, the lower sleeve 11 is implanted into the femoral body to establish a bone grafting channel, one end of the lower sleeve 11 away from the femoral head X protrudes to the outside of the femoral body, the side wall of the lower sleeve 11 is provided with a socket 13, when the lower sleeve 11 is implanted into the femoral body, the socket 13 is located in the bone grafting area Y.

[0050] The bone grafting device further comprises an inner tube 3 , which can simultaneously pass through the upper sleeve 12 and the socket 13 to reach the bone grafting area Y, and can simultaneously pass through the lower sleeve 11 and the upper sleeve 12 to reach the interior of the femoral head X.

[0051] An annular drill bit 2 is provided at the feeding end of the lower casing 11 and the inner pipe 3 .

[0052] In this embodiment, the lower sleeve 11 is pre-implanted into the femoral body as a bone grafting channel, so that the inner tube 3 can perform bone grafting and bone grafting operations in the channel. In actual use, the cancellous bone grafting area Y and the necrotic part of the femoral head X need to be determined according to the patient's condition. The implantation direction of the lower sleeve 11 must pass through the cancellous bone grafting area Y and the necrotic part of the femoral head X at the same time, that is, the necrotic part of the femoral head X is located at the feeding end of the lower sleeve 11, and the socket 13 on the surface of the lower sleeve 11 is facing the cancellous bone grafting area Y; in addition The upper sleeve 12 is used as an operating end to facilitate the implantation of the lower sleeve 11, or the angle of the inner tube 3 is adjusted by adjusting the angle of the lower sleeve 11, so as to facilitate the bone removal and bone grafting operation of the inner tube 3 inside the lower sleeve 11. Specifically, by setting a connecting mechanism 5, the angle between the lower sleeve 11 and the upper sleeve 12 is adjustable. When the lower sleeve 11 and the upper sleeve 12 are adjusted to a vertical state by using the connecting mechanism 5, the upper sleeve 12 can be operated to implant the lower sleeve 11 into the femoral body to establish a bone grafting channel.

[0053] When taking bone, the connection mechanism 5 is used to adjust the angle of the upper sleeve 12 so that the channel direction of the upper sleeve 12 is opposite to the socket 13, and then the inner tube 3 is passed through the upper sleeve 12 and the socket 13, so that the inner tube 3 can pass through the socket 13 to enter the cancellous bone taking area to perform the bone taking operation. After the bone taking is completed, the inner tube 3 is returned to the inside of the upper sleeve 12, and then the connection mechanism 5 is used to adjust the upper sleeve 12 and the lower sleeve 11 to a vertical state, and then the inner tube 3 is passed through the lower sleeve 11, so that the inner tube 3 carrying the cancellous bone reaches the femoral head X area, and the external driving member is used to push the cancellous bone from the inside of the inner tube 3 into the femoral head X area, thereby realizing the bone grafting operation.

[0054] Among them, the above-mentioned external driving member can be a push rod or a pneumatic component, the outer diameter of the push rod is adapted to the inner diameter of the inner tube 3, the user inserts the push rod into the inner tube 3 and applies a thrust, so that the cancellous bone can be pushed out from the inner tube 3; the air supply pipe end of the pneumatic component can be connected to the inner tube 3, and gas can be delivered to the inner tube 3 to increase the air pressure inside the inner tube 3, so that the cancellous bone can be pushed out from the inner tube 3; compared with the push rod, the pneumatic component causes less damage to the cancellous bone when pushing the cancellous bone.

[0055] In addition, the pneumatic component uses an air pump. When the air pump is in use, a control machine can be added as a controller. The control machine can be a PCB control board or a micro single-chip computer. The control machine can control the implantation speed of the cancellous bone by controlling the air delivery speed of the air pump. Here, the model of the air pump is not required, and the principle of air delivery and pressurization of the air pump is an existing conventional technology, which will not be repeated here.

[0056] like Figure 4 As shown, the socket member 13 is a plurality of groups of sockets adapted to the inner pipe member 3 , and the sockets are distributed in a linear array along the axis direction of the lower casing 11 .

[0057] In this embodiment, the socket parts 13 are arranged in multiple groups. When the inner tube part 3 is inserted into different sockets, the angle between the inner tube part 3 and the lower sleeve 11 is different. The bone removal angle of the inner tube part 3 can be changed by changing the insertion site of the inner tube part 3, so that it can be flexibly adjusted according to the cancellous bone condition of different patients.

[0058] like Figure 5 As shown, the socket 13 is an independent socket, the length of the socket 13 along the axial direction of the lower casing 11 is greater than the diameter of the inner pipe 3, the length of the socket 13 perpendicular to the axial direction of the lower casing 11 is greater than or equal to the diameter of the inner pipe 3, and a plurality of groups of unconnected rubber sheets are fixedly connected inside the socket 13. In the natural state, the rubber sheets can block the socket 13.

[0059] In this embodiment, the socket 13 is set as an independent socket, and the size of the socket is much larger than the size of the inner tube 3. Compared with setting multiple groups of sockets adapted to the inner tube 3, the independent socket is more convenient for the inner tube 3 to be inserted, which is convenient for the user to operate. Moreover, since the size of the independent socket is much larger than the size of the inner tube 3, the inner tube 3 can also move inside the independent socket after being inserted into the independent socket, so that the angle between the inner tube 3 and the lower sleeve 11 can be adjusted to facilitate the cancellous bone extraction operation. The rubber sheet has a certain toughness. In the natural state, the adjacent edges of the rubber sheet contact each other, and the rubber sheet forms a whole to block the socket 13. When the bone grafting device is not in use, the rubber sheet can form a protection at the socket 13 to prevent external dust from entering the lower sleeve 11 and the upper sleeve 12 through the socket 13. And because the rubber sheet has a certain toughness, when the inner pipe 3 passes through the socket 13, it only needs to apply a certain thrust to the inner pipe 3, and the rubber sheet will be deformed by the thrust, so that the inner pipe 3 can easily pass through the socket 13.

[0060] like Figures 3 to 9 As shown, the connecting mechanism 5 includes a connecting hose 51, an annular connecting plate 52 and a connecting head 53. Both ends of the connecting hose 51 are fixedly connected with annular connecting plates 52, and the surfaces of two groups of annular connecting plates 52 are fixedly connected with protruding connecting heads 53. The connecting ends of the lower sleeve 11 and the upper sleeve 12 and the outer surfaces of the connecting heads 53 are provided with matching connecting threads 54, and the lower sleeve 11 and the upper sleeve 12 are both threadedly connected with the connecting head 53.

[0061] In this embodiment, by providing a connecting head 53, the annular connecting plates 52 on both sides of the connecting hose 51 can be threadedly connected to the lower sleeve 11 and the upper sleeve 12 respectively, and a bendable connecting hose 51 is formed between the lower sleeve 11 and the upper sleeve 12, so that the angle between the lower sleeve 11 and the upper sleeve 12 can be adjusted as needed.

[0062] A limiting mechanism 6 is further provided between the lower sleeve 11 and the upper sleeve 12 , and the limiting mechanism 6 can connect the lower sleeve 11 and the upper sleeve 12 so that the lower sleeve 11 and the upper sleeve 12 rotate synchronously.

[0063] like Figures 3 to 9As shown, the limiting mechanism 6 includes a connecting rod 61, an annular plate 62, a spring 63 and an electromagnet 64. A groove body 66 is provided inside the side wall of the upper sleeve 12. The groove body 66 separates the upper sleeve 12 into a double-layer structure. The end of the groove body 66 close to the lower sleeve 11 is set to an open shape. The annular plate 62 is installed in the groove body 66. A plurality of groups of connecting rods 61 are fixedly connected to the surface of the annular plate 62. A slot 67 adapted to the connecting rod 61 is provided in the annular connecting plate 52 and the connecting hose 51. A limiting groove 65 adapted to the connecting rod 61 is provided at the connecting end of the lower sleeve 11. A moving part is provided inside the groove body 66. The moving part can drive the annular plate 62 and the connecting rod 61 to move, so that one end of the connecting rod 61 moves into the limiting groove 65 through the slot 67.

[0064] The moving part includes a spring 63 fixedly mounted on the surface of the annular plate 62. The spring 63 is sleeved inside the groove body 66, and the closed end of the inner surface of the groove body 66 is fixedly connected to an electromagnet 64. The annular plate 62 is magnetic. When the electromagnet 64 is energized, it can attract the annular plate 62 to move the connecting rod 61 out from the limiting groove 65 and the slot 67.

[0065] In this embodiment, by providing the limiting mechanism 6 , the lower sleeve 11 can be rotated by rotating the upper sleeve 12 , so that the position of the socket 13 on the surface of the lower sleeve 11 can be adjusted.

[0066] Specifically, a button can be provided on the outer surface of the upper sleeve 12, and a battery assembly can also be provided on the outer surface of the upper sleeve 12 to provide corresponding power to the electromagnet 64. Pressing the button can control the switch of the electromagnet 64 to power on or off the electromagnet 64. When the electromagnet 64 is powered on, the electromagnet 64 generates magnetism to attract the magnetic annular plate 62, so that the annular plate 62 and the connecting rod 61 move toward the closed end of the groove body 66. At this time, the spring 63 located inside the groove body 66 is compressed, so that the connecting rod 61 can move out of the limit groove 65 and the slot 67, and the connecting rod 61 is vertically There is no restriction on the connecting hose 51, the connecting hose 51 can be bent freely, and the angle between the upper sleeve 12 and the lower sleeve 11 is adjustable; when the electromagnet 64 is powered off, the electromagnet 64 loses its magnetism, and the compressed spring 63 resets, driving the annular plate 62 and the connecting rod 61 to move back, so that the connecting rod 61 can pass through the slot 67 and move into the limiting groove 65 inside the lower sleeve 11, thereby locking the lower sleeve 11 and the upper sleeve 12. Therefore, the lower sleeve 11 can be driven to rotate by operating the upper sleeve 12 to rotate, thereby adjusting the position of the socket 13 on the lower sleeve 11.

[0067] Handles 4 are fixedly connected to both sides of the outer surface of the end of the inner tube 3 away from the annular drill bit 2, and the upper sleeve 12 and the end of the inner tube 3 away from the annular drill bit 2 are provided with matching thread structures.

[0068] In this embodiment, when the lower sleeve 11 is implanted into the femoral body, the lower sleeve 11 and the upper sleeve 12 are adjusted to a vertical state, and then the inner tube 3 is inserted into the lower sleeve 11 and the upper sleeve 12, and the inner tube 3 is rotated to make one end of the inner tube 3 threadedly connected to the upper sleeve 12, so that the inner tube 3, the upper sleeve 12 and the lower sleeve 11 are integrated. Therefore, the inner tube 3, the upper sleeve 12 and the lower sleeve 11 can be adjusted by operating the handle 4; when bone removal and bone grafting operations are required, it is only necessary to rotate the inner tube 3 to separate the inner tube 3 from the upper sleeve 12, and the inner tube 3 can be operated alone.

[0069] like Figures 10 to 12 As shown, the present invention also includes an adjusting mechanism 7, which includes a slide 71 and a rod 72. One end of the slide 71 is fixedly connected to the upper sleeve 12, and the other end of the slide 71 is rotatably connected to the rod 72 through a rotating joint. A side opening is opened on the side wall of the slide 71, and a gear 77 is rotatably installed inside the side opening. A support plate 75 is fixedly connected to the surface of the gear 77, and the support plate 75 is located outside the slide 71. A tooth plate 76 is installed inside the slide 71, and the tooth plate 76 is meshed with the gear 77. An adjusting plate 74 is fixedly connected to the surface of the tooth plate 76, and one end of the adjusting plate 74 passes through the outside of the slide 71 and is rotatably connected to a screw 73, and one end of the screw 73 is inserted into the inside of the slide 71.

[0070] In this embodiment, by rotating the screw rod 73, the adjustment plate 74 and the tooth plate 76 are driven to move, thereby driving the gear 77 and the support plate 75 to rotate, so that the support plate 75 and the slide seat 71 are at a certain angle. When the upper sleeve 12 and the lower sleeve 11 are deflected, a triangular structure is formed between the support plate 75, the slide seat 71 and the rod 72, which can support the upper sleeve 12 and the lower sleeve 11, and by adjusting the angle of the support plate 75, the angle between the upper sleeve 12 and the lower sleeve 11 can be limited.

[0071] The workflow of the technical solution of the present invention is as follows:

[0072] In actual use, it is necessary to determine the cancellous bone harvesting area Y and the necrotic part of the femoral head X according to the patient's condition. The implantation direction of the lower sleeve 11 must pass through the cancellous bone harvesting area Y and the necrotic part of the femoral head X at the same time, that is, the necrotic part of the femoral head X is located at the feeding end of the lower sleeve 11, and the socket 13 on the surface of the lower sleeve 11 is facing the cancellous bone harvesting area Y; in addition, the upper sleeve 12 is used as an operating end to facilitate the implantation of the lower sleeve 11, or the angle of the inner tube 3 is adjusted by adjusting the angle of the lower sleeve 11, so as to realize the bone harvesting and bone grafting operation of the inner tube 3 inside the lower sleeve 11. Specifically, by setting a connecting mechanism 5, the angle between the lower sleeve 11 and the upper sleeve 12 is adjustable. When the lower sleeve 11 and the upper sleeve 12 are adjusted to a vertical state by using the connecting mechanism 5, It is convenient to operate the upper sleeve 12 to implant the lower sleeve 11 into the femoral body to establish a bone grafting and bone taking channel; when taking bones, the connection mechanism 5 is used to adjust the angle of the upper sleeve 12 so that the channel direction of the upper sleeve 12 is opposite to the socket 13, and then the inner pipe 3 is passed through the upper sleeve 12 and the socket 13, so that the inner pipe 3 can pass through the socket 13 into the cancellous bone taking area to perform the bone taking operation. After the bone taking is completed, the inner pipe 3 is returned to the upper sleeve 12, and the connection mechanism 5 is used to adjust the upper sleeve 12 and the lower sleeve 11 to a vertical state, and then the inner pipe 3 is passed through the lower sleeve 11, so that the inner pipe 3 carrying the cancellous bone reaches the femoral head X area, and the cancellous bone is pushed from the inner pipe 3 into the femoral head X area by an external driving member, so as to realize the bone grafting operation.

[0073] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A proximal femoral cancellous bone grafting device, wherein the femoral body includes a femoral head X and a cancellous bone grafting area Y at the distal end of the femoral head, characterized in that: The bone removal and bone grafting device comprises an outer tube, the outer tube comprises a lower sleeve and an upper sleeve, a connecting mechanism is arranged between the lower sleeve and the upper sleeve, the connecting mechanism makes the angle between the lower sleeve and the upper sleeve adjustable, the central axis of the lower sleeve is arranged along the bone removal area Y in the direction of the femoral head X, the lower sleeve is implanted in the femoral body to establish a bone removal and bone grafting channel, one end of the lower sleeve away from the femoral head X protrudes to the outside of the femoral body, the side wall of the lower sleeve is provided with a socket, and when the lower sleeve is implanted in the femoral body, the socket is located in the bone removal area Y; The bone harvesting and implanting device further comprises an inner tube, which can simultaneously pass through the upper sleeve and the socket to reach the bone harvesting area Y, and can simultaneously pass through the lower sleeve and the upper sleeve to reach the interior of the femoral head X.

2. The proximal femoral cancellous bone harvesting and implanting device according to claim 1, characterized in that: The feeding ends of the lower casing and the inner pipe are both provided with an annular drill bit.

3. The proximal femoral cancellous bone harvesting and bone grafting device according to claim 2, characterized in that: The socket parts are multiple groups of sockets adapted to the inner pipe parts, and the sockets are distributed in a linear array along the axis direction of the lower casing.

4. The proximal femoral cancellous bone harvesting and bone grafting device according to claim 2, characterized in that: The socket piece is an independent socket, the length of the socket piece along the axis of the lower casing is greater than the diameter of the inner pipe piece, and the length of the socket piece perpendicular to the axis of the lower casing is greater than or equal to the diameter of the inner pipe piece.

5. The proximal femoral cancellous bone harvesting and implanting device according to claim 2, characterized in that: The cam is connected to the upper sleeve of the sliding seat, and the other end of the sliding seat is rotatably connected to the rod member through a rotating joint. A side opening is provided on the side wall of the sliding seat, and a gear is rotatably installed inside the side opening. A support plate is fixedly connected to the surface of the gear, and the support plate is located outside the sliding seat. A toothed plate is installed inside the sliding seat, and the toothed plate is meshed with the gear. An adjusting plate is fixedly connected to the surface of the toothed plate, and one end of the adjusting plate passes through the outside of the sliding seat and is rotatably connected to a screw rod, and one end of the screw rod is inserted into the sliding seat.

6. The proximal femoral cancellous bone harvesting and bone grafting device according to claim 2, characterized in that: The connecting mechanism includes a connecting hose, an annular connecting plate and a connecting head. Both ends of the connecting hose are fixedly connected to annular connecting plates, and the surfaces of two groups of annular connecting plates are fixedly connected to protruding connecting heads. The connecting ends of the lower sleeve and the upper sleeve and the outer surfaces of the connecting head are provided with matching connecting threads, and the lower sleeve and the upper sleeve are both threadedly connected to the connecting head.

7. The proximal femoral cancellous bone harvesting and implanting device according to claim 6, characterized in that: A limiting mechanism is also provided between the lower sleeve and the upper sleeve, and the limiting mechanism can connect the lower sleeve and the upper sleeve so that the lower sleeve and the upper sleeve are deflected synchronously.

8. The proximal femoral cancellous bone harvesting and implanting device according to claim 7, characterized in that: The limiting mechanism includes a connecting rod, an annular plate, a spring and an electromagnet. A groove body is provided inside the side wall of the upper sleeve, and the groove body separates the upper sleeve into a double-layer structure. The end of the groove body close to the lower sleeve is set to an open shape. The annular plate is installed in the groove body. Multiple groups of connecting rods are fixedly connected to the surface of the annular plate. Slots adapted to the connecting rods are provided in the annular connecting plate and the connecting hose. A limiting groove adapted to the connecting rod is provided at the connecting end of the lower sleeve. A moving part is provided inside the groove body, and the moving part can drive the annular plate and the connecting rod to move, so that one end of the connecting rod moves into the limiting groove through the slot.

9. The proximal femoral cancellous bone harvesting and implanting device according to claim 8, characterized in that: The moving part includes a spring fixedly mounted on the surface of the annular plate, the spring is sleeved inside the groove body, and an electromagnet is fixedly connected to the closed end of the inner surface of the groove body. The annular plate is magnetic, and the electromagnet can attract the annular plate when energized, so that the connecting rod moves out of the limiting groove and the slot.

10. The proximal femoral cancellous bone harvesting and implanting device according to claim 2, characterized in that: Handles are fixedly connected to both sides of the outer surface of one end of the inner tube away from the annular drill bit, and matching thread structures are provided on the upper sleeve and the end of the inner tube away from the annular drill bit.

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