A proximal femoral cancellous bone harvesting and implanting device

Abstract

The present invention provides a proximal femoral cancellous bone harvesting and implanting device, belonging to the field of medical device technology. The device comprises a femoral head X and a cancellous bone harvesting region Y at the distal end of the femoral head. The device comprises an outer tube, the outer tube comprising a lower sleeve and an upper sleeve, a connecting mechanism being provided between the lower sleeve and the upper sleeve, the connecting mechanism enabling an adjustable angle between the lower sleeve and the upper sleeve, the central axis of the lower sleeve being arranged along the bone harvesting region Y toward the femoral head X, the lower sleeve being implanted into the femoral body to establish a bone harvesting and implanting channel, the lower sleeve, the upper sleeve, the inner tube, and the connecting mechanism being provided in the present invention cooperating with each other to achieve bone harvesting and implanting operations, eliminating the need to replace instruments during the bone harvesting and implanting processes, and facilitating operation. Specifically, the inner tube can be simultaneously passed through the upper sleeve and the socket member to reach the bone harvesting region Y for bone harvesting, or the inner tube can be simultaneously passed through the lower sleeve and the upper sleeve to reach the interior of the femoral head X for bone implanting.

Description

Technical Field

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

[0002] After avascular necrosis of the femoral head occurs, a 3-4 mm wide layer of dense bone forms in the reactive new bone layer surrounding 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. To promote the repair of the necrotic area of the femoral head, vascular bundles and cancellous bone transplantation can be used to treat avascular necrosis of the femoral head.

[0003] There are many existing femoral bone harvesting and bone grafting instruments. Separate instruments are required for bone harvesting and bone grafting. The instruments are not universal for bone grafting and harvesting. They need to be constantly replaced during use, which is quite troublesome to cooperate with 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 separate instruments are required for bone harvesting and bone grafting, and the instruments cannot be used interchangeably during bone grafting and harvesting. They need to be constantly replaced during use, which is quite troublesome to cooperate during the operation and wastes operation time. The purpose of the present invention is to provide a proximal femoral cancellous bone harvesting and bone grafting instrument.

[0005] In order 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 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, the outer tube including a lower sleeve and an upper sleeve. A connecting mechanism is provided between the lower sleeve and the upper sleeve, and the connecting mechanism allows 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 formed on the side wall of the lower sleeve. 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, the feed ends of the lower casing and the inner pipe are both provided with an annular drill bit.

[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, and 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 cooperated with and 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, and 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 the 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 heads 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 cooperatively installed inside the groove body, multiple groups of connecting rods are fixedly connected to the surface of the annular plate, the annular connecting plate and the connecting hose are provided with slots adapted to the connecting rod, the connecting end of the lower sleeve is provided with a limiting groove adapted to the connecting rod, a moving part is provided inside the groove body, 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 the closed end of the inner surface of the groove body is fixedly connected to an electromagnet, 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 the 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] By changing the insertion site of the inner tube, the bone removal angle of the inner tube is changed, 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 one skilled in the 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 the femoral body;

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

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

[0027] Figure 5 This is a schematic structural 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 Enlarged view of point A in the middle;

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

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

[0032] Figure 10 It is a structural schematic diagram of the adjustment mechanism of the present invention;

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

[0034] Figure 12 It is a structural schematic diagram of the adjustment 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. Adjustment mechanism; 71. Slide; 72. Rod; 73. Screw; 74. Adjustment 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, with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are optimal and preferred embodiments, and those skilled in the art may also adopt other alternatives for implementing the invention in accordance with known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention in any specific manner.

[0045] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0046] In general, terms can be understood, at least in part, from their 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” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0048] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated 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 should be similarly interpreted accordingly.

[0049] like Figures 1 to 3As shown, an embodiment of the present invention provides a proximal femoral cancellous bone harvesting and implanting device, the femoral body includes a femoral head X and a cancellous bone harvesting area Y at the distal end of the femoral head, the bone harvesting and implanting 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 provided 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 harvesting area Y toward the femoral head X, the lower sleeve 11 is implanted into the femoral body to establish a bone harvesting and implanting 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 harvesting 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 feed 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 to facilitate the subsequent bone grafting and bone grafting operations in the channel by the inner tube 3. In actual use, it is necessary to determine the cancellous bone grafting 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 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 serves as an operating end to facilitate the implantation of the lower sleeve 11, or the angle of the inner tube 3 can be 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 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 harvesting bone, the connecting 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 piece 13, and then the inner tube 3 is passed through the upper sleeve 12 and the socket piece 13, so that the inner tube 3 can pass through the socket piece 13 into the cancellous bone harvesting area to perform the bone harvesting operation. After the bone harvesting is completed, the inner tube 3 is retracted into the interior of the upper sleeve 12, and then the connecting 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 interior 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 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 supplied 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 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 piece 13 is an independent socket. The length of the socket piece 13 along the axial direction of the lower casing 11 is greater than the diameter of the inner pipe piece 3. The length of the socket piece 13 perpendicular to the axial direction of the lower casing 11 is greater than or equal to the diameter of the inner pipe piece 3. There are multiple groups of unconnected rubber sheets fixedly connected inside the socket piece 13. In the natural state, the rubber sheets can block the socket piece 13.

[0059] In this embodiment, the socket 13 is configured as an independent socket, the size of which is much larger than that of the inner tube 3. Compared with providing multiple sets of sockets adapted to the inner tube 3, the independent socket is more convenient for inserting the inner tube 3 and is more convenient for the user to operate. Moreover, since the size of the independent socket is much larger than that of the inner tube 3, the inner tube 3 can also move inside the independent socket after being inserted into the independent socket, thereby adjusting the angle between the inner tube 3 and the lower sleeve 11 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, sealing the socket 13. When the bone grafting device is not in use, the rubber sheet can form a protective layer 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 tube 3 passes through the socket 13, it only needs to apply a certain thrust to the inner tube 3. The rubber sheet will be deformed by the thrust, so that the inner tube 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 to the annular connecting plates 52, and the surfaces of the two sets of annular connecting plates 52 are fixedly connected to 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 to the connecting heads 53.

[0061] In this embodiment, by providing a connecting head 53, the annular connecting plates 52 on both sides of the connecting hose 51 are 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 . 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 66 is provided inside the side wall of the upper sleeve 12. The groove 66 separates the upper sleeve 12 into a double-layer structure. The groove 66 is set to an open shape at one end close to the lower sleeve 11. The annular plate 62 is installed in the groove 66. Multiple groups of connecting rods 61 are fixedly connected to the surface of the annular plate 62. Slots 67 adapted to the connecting rod 61 are 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 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 and 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 , thereby adjusting the position of the socket 13 on the surface of the lower sleeve 11 .

[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 electricity to the electromagnet 64. Pressing the button can control the switch of the electromagnet 64, so that the electromagnet 64 is powered on or off. When the electromagnet 64 is powered on, the electromagnet 64 generates magnetism, attracts the magnetic annular plate 62, and moves the annular plate 62 and the connecting rod 61 toward the closed end of the groove body 66. At this time, the spring 63 located inside the groove body 66 is compressed, and the connecting rod 61 can be moved 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 shape, 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 so that one end of the inner tube 3 is 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, so that the inner tube 3 can be operated alone.

[0069] like Figures 10 to 12 As shown, the present invention also includes an adjustment 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 provided 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 adjustment plate 74 is fixedly connected to the surface of the tooth plate 76. One end of the adjustment plate 74 passes through the outside of the slide 71 and is rotatably connected to a screw 73. One end of the screw 73 is inserted into the inside of the slide 71.

[0070] In this embodiment, by rotating the screw 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 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 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 serves as an operating end to facilitate the implantation of the lower sleeve 11, or to adjust the angle of the inner tube 3 by adjusting the angle of the lower sleeve 11, so as to facilitate the bone harvesting and bone grafting operation of the inner tube 3 inside the lower sleeve 11. Specifically, by providing 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 using the connecting mechanism 5, It is convenient to operate the upper sleeve 12 so that the lower sleeve 11 is implanted into the interior of the femoral body to establish a bone grafting and bone harvesting channel; when harvesting bones, the connecting 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 piece 13, and then the inner tube piece 3 is passed through the upper sleeve 12 and the socket piece 13, so that the inner tube piece 3 can pass through the socket piece 13 into the cancellous bone harvesting area for bone harvesting operation. After the bone harvesting is completed, the inner tube piece 3 is retracted into the interior of the upper sleeve 12, and the connecting mechanism 5 is used to adjust the upper sleeve 12 and the lower sleeve 11 to a vertical state, and then the inner tube piece 3 is passed through the lower sleeve 11, so that the inner tube piece 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 interior of the inner tube piece 3 into the femoral head X area, thereby realizing the bone grafting operation.

[0073] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been 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 principles of the present invention. These improvements and modifications should also be regarded as within 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 grafting device includes an outer tube, which includes a lower sleeve and an upper sleeve. A connecting mechanism is provided between the lower sleeve and the upper sleeve, and the connecting mechanism enables an adjustable angle between the lower sleeve and the upper sleeve. The central axis of the lower sleeve is arranged along the bone grafting area Y in the direction of the femoral head X. The lower sleeve is implanted in 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. When the lower sleeve is implanted in the femoral body, the socket is located in the bone grafting 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 for bone implantation.

2. The proximal femoral cancellous bone harvesting and implanting device according to claim 1, characterized in that: The feed 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 implanting 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 implanting 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 connected to the upper sleeve of the sliding seat by a screw. The sliding seat has a side opening, 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. One end of the adjusting plate passes through the outside of the sliding seat and is rotatably connected to a screw, and one end of the screw is inserted into the sliding seat.

6. The proximal femoral cancellous bone harvesting and implanting 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 the 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 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.

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 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. 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 limit groove and the slot.

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

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