Adjustable femoral stem prosthesis, femoral stem prosthesis system and methods of use thereof

Abstract

The invention relates to an adjustable femoral stem prosthesis, a femoral stem prosthesis system and a use method thereof. The adjustable femoral stem prosthesis comprises: a stem body; the femoral neck prosthesis is arranged at the near end of the handle body and can rotate around the axis of the handle body relative to the handle body; the first driving assembly is connected with the femoral neck prosthesis and used for driving the femoral neck prosthesis to rotate. Therefore, the anteversion angle of the femoral stem prosthesis is adjustable, and after hip replacement, if the anteversion angle of the femoral stem prosthesis is not matched with the physiological structure of a patient, the anteversion angle of the femoral stem prosthesis can be adjusted, so that on one hand, the adverse effect on daily activities of the patient due to the fact that the anteversion angle of the femoral stem prosthesis is not matched with the physiological structure of the patient is improved; the risk of dislocation of the hip joint is reduced; on the other hand, a new prosthesis does not need to be implanted in the body of the patient, and the pain of the patient is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an adjustable femoral stem prosthesis, a femoral stem prosthesis system and a method of using the same. Background Art

[0002] Hip replacement is a common operation in surgical medicine. Hip replacement is an effective means of treating diseases such as avascular necrosis of the femoral head, femoral neck fracture and hip osteoarthritis. Hip prosthesis is used to replace and repair the damaged hip joint, restore its physiological function and relieve pain.

[0003] Hip prostheses generally include a femoral stem, a ball head, a liner and an acetabular cup. Current hip replacements are prone to the following problems after surgery: On the one hand, for some patients, the mismatch between the femoral stem parameters and the patient's physiological structure or the loosening of the patient's soft tissues can have an adverse effect on the patient's daily activities such as walking, and in severe cases, can cause hip dislocation; on the other hand, for patients whose bones are still growing, such as young patients who undergo joint replacement due to bone tumors, after hip replacement, the growth of the proximal femur on the replacement side stagnates, while the femur on the non-replaced side is still growing, resulting in the problem of unequal length of the two lower limbs, which has an adverse effect on the patient's walking and may even cause lameness. Summary of the invention

[0004] Based on this, it is necessary to provide an adjustable femoral stem prosthesis, a femoral stem prosthesis system and a method of using the same to address at least one of the above problems.

[0005] In order to achieve the above objectives, in a first aspect, an embodiment of the present application provides an adjustable femoral stem prosthesis, the adjustable femoral stem prosthesis comprising:

[0006] handle body;

[0007] A femoral neck prosthesis is disposed at the proximal end of the handle body and can rotate relative to the handle body around the axis of the handle body;

[0008] The first driving component is connected to the femoral neck prosthesis and is used to drive the femoral neck prosthesis to rotate.

[0009] In one embodiment, the first drive assembly comprises:

[0010] a first rotary drive member;

[0011] A first transmission assembly, wherein an input end of the first transmission assembly is connected to a driving end of the first rotary drive member, and an output end of the first transmission assembly is connected to the femoral neck prosthesis.

[0012] In one embodiment, the first transmission assembly includes:

[0013] A first rotating engagement member, sleeved on a driving end of the first rotating driving member;

[0014] The second rotating engagement member is engaged with the first rotating engagement member and is fixed on the femoral neck prosthesis.

[0015] In one embodiment, the femoral neck prosthesis is provided with a connecting shaft, the handle body is provided with an assembly hole, and the connecting shaft is rotatably assembled in the assembly hole;

[0016] The second rotating engagement member is sleeved on the connecting shaft.

[0017] In one embodiment, the handle comprises:

[0018] A distal handle having a first portion and a second portion connected to each other, wherein the first portion is used to extend into the femoral medullary cavity of the patient; and

[0019] A proximal handle body is disposed around the outer periphery of the second portion and can move relative to the second portion toward or away from the first portion;

[0020] The adjustable femoral stem prosthesis also includes:

[0021] The second driving assembly is connected to the proximal handle body and is used to drive the proximal handle body to move.

[0022] In one embodiment, the second drive assembly comprises:

[0023] a second rotary drive member;

[0024] The motion conversion mechanism is in driving connection with the second rotary drive member and is used for converting the rotation output of the second rotary drive member into the linear motion of the proximal handle body.

[0025] In one embodiment, the motion conversion mechanism comprises:

[0026] a threaded hole, disposed on the second portion;

[0027] A threaded transmission member has one end threadedly connected to the threaded hole and the other end drivingly connected to the proximal handle body.

[0028] In one embodiment, the second drive assembly includes a linear drive member, a main body of the linear drive member is connected to the distal handle body, and a drive end of the linear drive member is connected to the proximal handle body.

[0029] In one embodiment, the femoral neck prosthesis comprises:

[0030] A connecting portion connected to the proximal end of the handle body; and

[0031] A neck portion, disposed on the connecting portion and capable of rotating relative to the connecting portion around a first rotation center line, wherein the first rotation center line is perpendicular to the axis of the handle body;

[0032] The adjustable femoral stem prosthesis also includes:

[0033] The third driving assembly is connected to the neck and is used for driving the neck to rotate.

[0034] In one embodiment, the third drive assembly includes:

[0035] a third rotary drive member;

[0036] A second transmission assembly, wherein an input end of the second transmission assembly is connected to a driving end of the third rotating driving member, and an output end of the second transmission assembly is connected to the neck.

[0037] In one embodiment, the second transmission assembly includes:

[0038] a third rotating engagement member, sleeved on the driving end of the third rotating driving member;

[0039] The fourth rotating engagement member is engaged with the third rotating engagement member and is fixed on the neck.

[0040] In one embodiment, the adjustable femoral stem prosthesis further comprises:

[0041] The detection component is arranged on the handle body and / or the femoral neck prosthesis; the detection component is used to detect the state parameters of the adjustable femoral stem prosthesis.

[0042] In a second aspect, an embodiment of the present application provides a femoral stem prosthesis system, comprising:

[0043] The adjustable femoral stem prosthesis according to any one of claims 1 to 12; the adjustable femoral stem prosthesis is provided with a power interface;

[0044] A human-machine interaction device, used for adjusting the adjustable femoral stem prosthesis;

[0045] The signal transmission component has a first connection end and a second connection end, wherein the first connection end is detachably connected to the power interface, and the second connection end is connected to the human-computer interaction device.

[0046] In one embodiment, the human-computer interaction device comprises:

[0047] An input module, used for inputting adjustment parameters of the adjustable femoral stem prosthesis;

[0048] A signal processing and transmission module is electrically connected to the input module; the signal processing and transmission module is used to convert the adjustment parameters into electrical signals and transmit them to the adjustable femoral stem prosthesis.

[0049] In one of the embodiments, the signal processing and transmission module is further used to obtain a detection signal of a detection component of the adjustable femoral stem prosthesis;

[0050] The human-computer interaction device also includes:

[0051] The display module is electrically connected to the signal processing and transmission module.

[0052] The adjustable femoral stem prosthesis and femoral stem prosthesis system provided in the embodiment of the present application enable the femoral neck prosthesis to rotate relative to the stem body around the axis of the stem body, and a first driving component is provided to drive the femoral neck prosthesis to rotate. In this way, the anteversion angle of the femoral stem prosthesis is adjustable. Thus, after hip replacement surgery, if the anteversion angle of the femoral stem prosthesis does not match the patient's physiological structure, the anteversion angle of the femoral stem prosthesis can be adjusted. On the one hand, the adverse effect of the mismatch between the anteversion angle of the femoral stem prosthesis and the patient's physiological structure on the patient's daily activities is improved, and the risk of hip dislocation is reduced; on the other hand, there is no need to re-implant a new prosthesis in the patient's body, which alleviates the patient's pain.

[0053] In a third aspect, an embodiment of the present application provides a method for using a femoral stem prosthesis system, comprising:

[0054] Connecting the first connecting end of the signal transmission member to the power interface of the adjustable femoral stem prosthesis;

[0055] adjusting the adjustable femoral stem prosthesis through the human-machine interaction device;

[0056] Acquiring actual state parameters of the adjustable femoral stem prosthesis, and determining whether the actual state parameters meet preset conditions; if the actual state parameters do not meet the preset conditions, repeatedly adjusting the adjustable femoral stem prosthesis until the actual state parameters meet the preset conditions; if the actual state parameters meet the preset conditions, terminating the adjustment;

[0057] Disconnect the first connection end from the power interface.

[0058] The method for using the femoral stem prosthesis system provided in the embodiment of the present application can adjust the parameters of the adjustable femoral stem prosthesis relatively conveniently, which is beneficial to improving the adjustment efficiency of the adjustable femoral stem prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 A schematic structural diagram of an adjustable femoral stem prosthesis provided in one embodiment of the present application.

[0061] Figure 2 for Figure 1 A schematic structural diagram of a femoral neck prosthesis of an adjustable femoral stem prosthesis is shown.

[0062] Figure 3 for Figure 1 An exploded view of a first drive assembly of an adjustable femoral stem prosthesis is shown.

[0063] Figure 4 A schematic structural diagram of another adjustable femoral stem prosthesis provided in one embodiment of the present application.

[0064] Figure 5 for Figure 1 The diagrammatic assembly diagram of the third drive assembly of the adjustable femoral stem prosthesis and the femoral neck prosthesis is shown.

[0065] Figure 6 A schematic structural diagram of a femoral stem prosthesis system provided in one embodiment of the present application.

[0066] Figure 7 A schematic flow chart of a method for using a femoral stem prosthesis system provided in one embodiment of the present application.

[0067] Reference numerals:

[0068] 1. Femoral stem prosthesis system; 10. Adjustable femoral stem prosthesis; 11. Stem; 11a. Assembly hole; 111. Distal stem; 1111. First part; 1112. Second part; 112. Proximal stem; 12. Femoral neck prosthesis; 121. Connecting part; 122. Neck; 123. Connecting shaft; 13. First drive assembly; 131. First rotary drive member; 132. First transmission assembly; 1321. First rotary engagement member; 1322. Second rotary engagement member; 14. Second drive assembly; 141. First rotary engagement member Two rotating drive members; 142, motion conversion mechanism; 1421, threaded hole; 1422, threaded transmission member; 143, linear drive member; 15, third drive assembly; 151, third rotating drive member; 152, second transmission assembly; 1521, third rotating engagement member; 1522, fourth rotating engagement member; 16, detection assembly; 20, human-computer interaction device; 21, input module; 22, signal processing and transmission module; 23, display module; 30, signal transmission member; 31, first connection end; 32, second connection end. DETAILED DESCRIPTION

[0069] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0077] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, in this specification, the term "and / or" includes any and all combinations of the relevant listed items.

[0078] First, refer to Figure 1 As shown, an embodiment of the present application provides an adjustable femoral stem prosthesis 10 , which includes a stem body 11 , a femoral neck prosthesis 12 and a first driving assembly 13 .

[0079] Specifically, the femoral neck prosthesis 12 is disposed at the proximal end of the handle body 11 and can rotate relative to the handle body 11 around the axis a of the handle body 11. The first driving assembly 13 is connected to the femoral neck prosthesis 12 and is used to drive the femoral neck prosthesis 12 to rotate.

[0080] Here, the femoral neck prosthesis 12 is rotatably disposed at the proximal end of the stem body 11. When the femoral neck prosthesis 12 rotates around the axis a of the stem body 11, the anteversion angle of the adjustable femoral stem prosthesis 10 changes, thereby achieving the purpose of adjusting the anteversion angle.

[0081] It is understandable that in the relevant femoral stem prosthesis technology, for some patients, the mismatch between the femoral stem parameters and the patient's physiological structure or the loosening of the patient's soft tissue leads to adverse effects on the patient's daily activities such as walking, and even causes hip dislocation in severe cases. When the above problems occur, the current clinical practice requires revision surgery for the patient to remove the prosthesis and re-implant a new prosthesis.

[0082] However, the adjustable femoral stem prosthesis 10 provided in the embodiment of the present application enables the femoral neck prosthesis 12 to rotate relative to the handle body 11 around the axis a of the handle body 11, and a first driving assembly 13 is provided to drive the femoral neck prosthesis 12 to rotate. In this way, the anteversion angle of the femoral stem prosthesis is adjustable. Thus, after hip replacement surgery, if the anteversion angle of the femoral stem prosthesis does not match the patient's physiological structure, the anteversion angle of the femoral stem prosthesis can be adjusted. On the one hand, the adverse effect of the mismatch between the anteversion angle of the femoral stem prosthesis and the patient's physiological structure on the patient's daily activities is improved, and the risk of hip dislocation is reduced; on the other hand, there is no need to re-implant a new prosthesis in the patient's body, which alleviates the patient's pain.

[0083] It should be noted that the first drive assembly 13 may include a drive motor, the drive end of the drive motor is connected to the femoral neck prosthesis 12, and the drive end of the drive motor rotates, thereby driving the femoral neck prosthesis 12 to rotate. Further, the rotation center of the drive end of the drive motor coincides with the rotation center of the femoral neck prosthesis 12.

[0084] In one embodiment, referring to Figure 1 , Figure 2 and Figure 3 As shown, the first drive assembly 13 includes a first rotary drive member 131 and a first transmission assembly 132 , wherein the input end of the first transmission assembly 132 is connected to the driving end of the first rotary drive member 131 , and the output end of the first transmission assembly 132 is connected to the femoral neck prosthesis 12 .

[0085] It should be noted that by setting the first transmission component 132, on the one hand, it can be used to adjust the transmission ratio to facilitate the control of the rotation speed of the femoral neck prosthesis 12; on the other hand, the size, shape or position of the first transmission component 132 can be set according to the actual spatial position, so as to achieve the purpose of adjusting the assembly position of the first rotating drive component 131.

[0086] In one embodiment, the first transmission assembly 132 includes a first rotating engagement member 1321 and a second rotating engagement member 1322. The first rotating engagement member 1321 is sleeved on the driving end of the first rotating driving member 131. The second rotating engagement member 1322 is meshed with the first rotating engagement member 1321 and fixed to the femoral neck prosthesis 12. Exemplarily, the first rotating engagement member 1321 and the second rotating engagement member 1322 can both be gears.

[0087] In this way, the first transmission assembly 132 can have a compact structure and high transmission efficiency.

[0088] Furthermore, the rotation centerline of the first rotating engagement member 1321 and the rotation centerline of the second rotating engagement member 1322 are both parallel to the axis a of the handle body 11. In this way, the first rotating drive member 131 and the first transmission assembly 132 can occupy a smaller space after being assembled.

[0089] In one embodiment, referring to Figure 1 and Figure 2 As shown, the femoral neck prosthesis 12 is provided with a connecting shaft 123, and the handle body 11 is provided with an assembly hole 11a, and the connecting shaft 123 is rotatably assembled in the assembly hole 11a. The second rotating engagement member 1322 is sleeved on the connecting shaft 123. In this way, the connection structure between the femoral neck prosthesis 12 and the handle body 11 can be made simpler, reducing the cost.

[0090] Specifically, the connecting shaft 123 is disposed on a side of the femoral neck prosthesis 12 close to the handle body 11, and an assembly hole 11a is disposed at one end of the handle body 11 close to the femoral neck prosthesis 12, and the assembly hole 11a is opposite to the connecting shaft 123. Further, an assembly cavity is formed between the femoral neck prosthesis 12 and the handle body 11, and the first driving assembly 13, the connecting shaft 123 and the assembly hole 11a are all disposed in the assembly cavity.

[0091] In one example, a bearing is disposed in the assembly hole 11 a , and the connecting shaft 123 is assembled on the bearing, so that the wear of the connecting shaft 123 can be reduced.

[0092] It should be noted that, in one example, a first self-locking mechanism may be provided between the femoral neck prosthesis 12 and the handle body 11. When the femoral neck prosthesis 12 is adjusted, the first self-locking mechanism is self-locked, so that the femoral neck prosthesis 12 and the handle body 11 remain fixed. In another example, the first rotary drive member 131 may have a self-locking function. When the femoral neck prosthesis 12 is adjusted, the first rotary drive member 131 is powered off, and the driving end of the first rotary drive member 131 cannot rotate, so that the first rotary engagement member 1321 and the second rotary engagement member 1322 remain stationary, thereby keeping the femoral neck prosthesis 12 and the handle body 11 fixed.

[0093] In one embodiment, referring to Figure 1 and Figure 4 As shown, the handle body 11 includes a distal handle body 111 and a proximal handle body 112 .

[0094] The distal handle body 111 has a first portion 1111 and a second portion 1112 connected to each other, and the first portion 1111 is used to extend into the femoral medullary cavity of the patient. The proximal handle body 112 is arranged around the outer periphery of the second portion 1112, and can move relative to the second portion 1112 toward or away from the first portion 1111. It should be noted that when the adjustable femoral stem prosthesis 10 is implanted, the second portion 1112 of the proximal handle body 112 does not need to extend into the femoral medullary cavity of the patient. In this way, bone tissue will not grow into the second portion 1112, thereby facilitating the setting of the proximal handle body 112 and facilitating the extension and retraction of the proximal handle body 112.

[0095] Furthermore, the adjustable femoral stem prosthesis 10 further includes a second drive assembly 14 , which is connected to the proximal stem body 112 and is used to drive the proximal stem body 112 to move.

[0096] It should be noted that in the relevant femoral stem prosthesis technology, for patients whose bones are still growing, such as young patients who undergo joint replacement due to bone tumors, after hip replacement, the growth of the proximal femur on the replaced side stagnates, while the femur on the non-replaced side is still growing, resulting in the problem of unequal length of the two lower limbs, which has an adverse effect on the patient's walking and may even cause lameness.

[0097] In the application embodiment, by providing the proximal handle body 112 and the distal handle body 111, and making the proximal handle body 112 move relative to the distal handle body 111, it is equivalent to providing the handle body 11 with an adjustable length. In this way, if the problem of unequal length of the two lower limbs occurs after hip replacement surgery, the length of the handle body 11 can be adjusted, which on the one hand improves the adverse effects of the unequal length of the two lower limbs on the patient's walking; on the other hand, there is no need to re-implant a new prosthesis in the patient's body, which alleviates the patient's pain.

[0098] In one embodiment, referring to Figure 1 As shown, the second drive assembly 14 includes a second rotary drive member 141 and a motion conversion mechanism 142. The motion conversion mechanism 142 is in transmission connection with the second rotary drive member 141 and is used to convert the rotation output of the second rotary drive member 141 into the linear motion of the proximal handle body 112. In this way, the proximal handle body 112 can be adjusted more conveniently.

[0099] In one embodiment, the motion conversion mechanism 142 includes a threaded transmission member 1422 and a threaded hole 1421, wherein the threaded hole 1421 is disposed on the second portion 1112. One end of the threaded transmission member 1422 is threadedly connected to the threaded hole 1421, and the other end is drivingly connected to the proximal handle body 112. Exemplarily, the threaded transmission member 1422 may be a lead screw. The above arrangement may simplify the structure of the motion conversion mechanism 142, thereby reducing the cost.

[0100] Here, it should be noted that when the threaded transmission member 1422 rotates, it will move relative to the distal handle body 111. The other end of the threaded transmission member 1422 is in transmission connection with the proximal handle body 112, which means that when the distal handle body 111 moves, it will push the proximal handle body 112 to move.

[0101] It can be understood that the main body of the second rotary drive member 141 can be fixedly connected to the proximal handle body 112, and the driving end of the second rotary drive member 141 is connected to an end of the threaded transmission member 1422 away from the distal handle body 111. When the threaded transmission member 1422 moves, the threaded transmission member 1422 can push the proximal handle body 112 to move by pushing the second rotary drive member 141.

[0102] In one embodiment, referring to Figure 4 As shown, the second drive assembly 14 includes a linear drive member 143, the main body of the linear drive member 143 is connected to the distal handle body 111, and the driving end of the linear drive member 143 is connected to the proximal handle body 112. In this way, the driving end of the linear drive member 143 can directly push the proximal handle body 112 to move. In this way, on the one hand, the structure of the second drive assembly 14 can be simplified; on the other hand, the proximal handle body 112 can be adjusted more conveniently.

[0103] Exemplarily, the linear drive member 143 may be an electric push rod, a piston motor, a hydraulic telescopic member, or the like.

[0104] In one embodiment, referring to Figure 5As shown, the femoral neck prosthesis 12 includes a connecting portion 121 and a neck 122, wherein the connecting portion 121 is connected to the proximal end of the handle body 11. The neck 122 is arranged on the connecting portion 121 and can rotate relative to the connecting portion 121 around a first rotation center line, and the first rotation center line is perpendicular to the axis a of the handle body 11. It should be noted that when the neck 122 rotates, the connecting portion 121 and the handle body 11 remain fixed, so that the neck-shaft angle of the adjustable femoral stem prosthesis 10 can be changed by adjusting the rotation angle of the neck 122, thereby achieving the purpose of adjusting the neck-shaft angle.

[0105] Furthermore, the adjustable femoral stem prosthesis 10 further includes a third driving assembly 15 , which is connected to the neck 122 and is used to drive the neck 122 to rotate.

[0106] It should be noted that in the relevant femoral stem prosthesis technology, for some patients, the mismatch between the femoral stem parameters and the patient's physiological structure or the loosening of the patient's soft tissue leads to adverse effects on the patient's daily activities such as walking, and in severe cases, hip dislocation. When the above problems occur, the current clinical practice requires revision surgery to remove the prosthesis and re-implant a new prosthesis.

[0107] In the embodiment of the present application, the connection part 121 and the neck 122 are provided, and the neck 122 can rotate relative to the connection part 121. In this way, after hip replacement surgery, if the neck-shaft angle of the femoral stem prosthesis does not match the patient's physiological structure, the neck-shaft angle of the femoral stem prosthesis can be adjusted, which, on the one hand, improves the adverse effects of the mismatch between the neck-shaft angle of the femoral stem prosthesis and the patient's physiological structure on the patient's daily activities and reduces the risk of hip dislocation; on the other hand, there is no need to re-implant a new prosthesis in the patient's body, which alleviates the patient's pain.

[0108] It is understandable that the third rotating driving member 151 may include a driving motor, the driving end of the driving motor is connected to the neck 122, and the driving end of the driving motor rotates, thereby driving the neck 122 to rotate. Further, the rotation center of the driving end of the driving motor coincides with the rotation center of the neck 122.

[0109] In one embodiment, referring to Figure 5 As shown, the third driving assembly 15 includes a third rotating driving member 151 and a second transmission assembly 152 , wherein the input end of the second transmission assembly 152 is connected to the driving end of the third rotating driving member 151 , and the output end of the second transmission assembly 152 is connected to the neck 122 .

[0110] By setting the second transmission component 152, on the one hand, it can be used to adjust the transmission ratio to facilitate controlling the rotation speed of the neck 122; on the other hand, the size, shape or position of the second transmission component 152 can be set according to the actual spatial position, so as to achieve the purpose of adjusting the assembly position of the third rotating drive member 151.

[0111] In one embodiment, the second transmission assembly 152 includes a third rotating engagement member 1521 and a fourth rotating engagement member 1522. The third rotating engagement member 1521 is sleeved on the driving end of the third rotating driving member 151. The fourth rotating engagement member 1522 is engaged with the third rotating engagement member 1521 and fixed on the neck 122.

[0112] In this way, the second transmission assembly 152 can have a compact structure and high transmission efficiency.

[0113] Furthermore, the rotation centerline of the third rotating engagement member 1521 is parallel to the axis line a of the handle body 11. The rotation centerline of the fourth rotating engagement member 1522 is perpendicular to the axis line a of the handle body 11. Exemplarily, the third rotating engagement member 1521 and the fourth rotating engagement member 1522 may be bevel gears. The above arrangement, on the one hand, can make the connection structure between the connecting portion 121 and the neck 122 simpler and reduce costs; on the other hand, the third rotating drive member 151 can be arranged on one longitudinal side of the second transmission assembly 152, that is, the second transmission assembly 152 and the third rotating drive member 151 are arranged along the extension direction of the handle body 11, thereby reducing the space occupied by the third drive assembly 15.

[0114] It should be noted that, in one example, a second self-locking mechanism may be provided between the connection portion 121 and the neck portion 122. When the neck portion 122 is adjusted, the second self-locking mechanism is self-locked, so that the connection portion 121 and the neck portion 122 remain fixed. In another example, the third rotating drive member 151 may have a self-locking function. When the neck portion 122 is adjusted, the third rotating drive member 151 is powered off, and the driving end of the third rotating drive member 151 cannot rotate, so that the third rotating engagement member 1521 and the fourth rotating engagement member 1522 remain stationary, thereby keeping the connection portion 121 and the neck portion 122 fixed.

[0115] In one embodiment, referring to Figure 1 and Figure 4 As shown, the adjustable femoral stem prosthesis 10 further includes a detection component 16, which is disposed on the stem body 11 and / or the femoral neck prosthesis 12. The detection component 16 is used to detect the state parameters of the adjustable femoral stem prosthesis 10. In this way, when adjusting the adjustable femoral stem prosthesis 10, it is convenient for the staff to obtain the state parameters of the adjustable femoral stem prosthesis 10 in a timely and accurate manner, thereby improving the accuracy of the adjustment.

[0116] Exemplarily, the detection component 16 may include a detection component and a transmission component. The detection component may be a displacement sensor, an angle sensor or a photoelectric sensor. The transmission component is used to transmit the information detected by the detection component to an external receiving component, thereby facilitating the staff to obtain the status parameters of the adjustable femoral stem prosthesis 10 in a timely and accurate manner.

[0117] Second, refer to Figure 6 As shown, an embodiment of the present application provides a femoral stem prosthesis system 1, which includes the adjustable femoral stem prosthesis 10, a human-machine interaction device 20 and a signal transmission component 30 in any embodiment of the first aspect.

[0118] Specifically, a power interface (not shown) is provided on the adjustable femoral stem prosthesis 10. Exemplarily, the power interface can be provided on the stem body 11 or the femoral neck prosthesis 12. The human-machine interaction device 20 is used to adjust the adjustable femoral stem prosthesis 10. The signal transmission member 30 has a first connection end 31 and a second connection end 32, the first connection end 31 is detachably connected to the power interface, and the second connection end 32 is connected to the human-machine interaction device 20.

[0119] The adjustable femoral stem prosthesis 10 and femoral stem prosthesis system 1 provided in the embodiment of the present application enable the femoral neck prosthesis 12 to rotate relative to the handle body 11 around the axis a of the handle body 11, and a first drive assembly 13 is provided to drive the femoral neck prosthesis 12 to rotate. In this way, the parameters of the femoral stem prosthesis are adjustable. Thus, after hip replacement surgery, if the parameters of the femoral stem prosthesis do not match the patient's physiological structure, the anteversion angle, neck-shaft angle or stem length of the femoral stem prosthesis can be adjusted. On the one hand, the adverse effect of the mismatch between the parameters of the femoral stem prosthesis and the patient's physiological structure on the patient's daily activities is improved, and the risk of hip dislocation is reduced. On the other hand, when adjusting the femoral stem prosthesis, only a small incision needs to be made on the patient's skin to connect the first connecting end 31 to the power interface, so as to adjust the adjustable femoral stem prosthesis 10, without the need to re-implant a new prosthesis in the patient's body, thereby alleviating the patient's pain.

[0120] It should be noted that a part of the structure of the signal transmission component 30 may be a rod, for example, a part of the structure connected to the first connection end 31 is a rod, so that the first connection end 31 can be easily connected to the power interface.

[0121] In one embodiment, the human-computer interaction device 20 includes an input module 21 and a signal processing and transmission module 22. The input module 21 is used to input the adjustment parameters of the adjustable femoral stem prosthesis 10. Exemplarily, the input module 21 can be a button, a knob, etc. The signal processing and transmission module 22 is electrically connected to the input module 21, and the signal processing and transmission module 22 is used to convert the adjustment parameters into electrical signals and transmit them to the adjustable femoral stem prosthesis 10. Exemplarily, the signal processing and transmission module 22 can include a processing chip and a transmission chip, the processing chip converts the adjustment parameters into electrical signals, and the transmission chip transmits the electrical signals to the drive component on the adjustable femoral stem prosthesis 10.

[0122] In one embodiment, the signal processing and transmission module 22 is also used to obtain the detection signal of the detection component 16 of the adjustable femoral stem prosthesis 10. Exemplarily, the signal processing and transmission module 22 may include a receiving chip. In this way, the staff can obtain the state parameters of the adjustable femoral stem prosthesis 10 in real time during the adjustment process, which is conducive to improving the accuracy of the adjustment.

[0123] Furthermore, the human-machine interaction device 20 further includes a display module 23, which is electrically connected to the signal processing and transmission module 22. In this way, on the one hand, the display module 23 can be used to display the input adjustment parameters; on the other hand, the display module 23 can be used to display the real-time adjustment status of the femoral stem prosthesis, which is convenient for the staff to obtain the adjustment progress more intuitively, which is conducive to improving the accuracy of the adjustment.

[0124] Thirdly, refer to Figure 7 As shown, the embodiment of the present application provides a method for using a femoral stem prosthesis system, and the femoral stem prosthesis system 1 can be the femoral stem prosthesis system 1 in any embodiment of the second aspect. The method for using comprises:

[0125] S100: Connect the first connection end 31 of the signal transmission member 30 to the power interface of the adjustable femoral stem prosthesis 10. Specifically, the power interface of the adjustable femoral stem prosthesis 10 can be exposed, and the first connection end 31 of the signal transmission member 30 can be inserted into the power interface.

[0126] S200 : adjusting the adjustable femoral stem prosthesis 10 through the human-machine interaction device 20 . Specifically, the adjustment parameters are input through the input module 21 , and the signal processing and transmission module 22 converts the adjustment parameters into electrical signals and transmits them to the driving assembly on the adjustable femoral stem prosthesis 10 .

[0127] S300: Acquire the actual state parameters of the adjustable femoral stem prosthesis 10, and determine whether the actual state parameters meet the preset conditions. If the actual state parameters do not meet the preset conditions, repeatedly adjust the adjustable femoral stem prosthesis 10 until the actual state parameters meet the preset conditions. If the actual state parameters meet the preset conditions, terminate the adjustment.

[0128] Specifically, the actual state parameter may be the actual stem length, actual neck-shaft angle, actual anteversion angle, etc. of the adjustable femoral stem prosthesis 10. The preset condition may be the preset stem length, preset neck-shaft angle, preset anteversion angle, etc. to achieve an ideal state.

[0129] In one example, the actual status parameters of the adjustable femoral stem prosthesis 10 can be obtained through X-rays.

[0130] In another example, the detection component 16 of the adjustable femoral stem prosthesis 10 can transmit the actual state parameters to the signal processing transmission module 22, and the signal processing transmission module 22 transmits the processed signal to the display module 23, and the display module 23 displays the actual state of the adjustable femoral stem prosthesis 10. The staff can intuitively obtain the actual state parameters through the display module 23. In this embodiment, there is no need to repeatedly take X-rays to confirm whether the adjustment is in place, which shortens the operation time on the one hand and reduces the amount of X-ray radiation to the patient on the other hand.

[0131] S400: Disconnect the first connection end 31 from the power interface. In this way, the adjustment of the adjustable femoral stem prosthesis 10 can be completed.

[0132] The method of using the femoral stem prosthesis system 1 provided in the embodiment of the present application can adjust the parameters of the adjustable femoral stem prosthesis 10 relatively conveniently, which is beneficial to improving the adjustment efficiency of the adjustable femoral stem prosthesis 10.

[0133] The method for using the femoral stem prosthesis system provided in the embodiment of the present application can adjust the parameters of the femoral stem prosthesis relatively conveniently, which is beneficial to improving the adjustment efficiency of the femoral stem prosthesis.

[0134] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0135] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features of the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0136] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An adjustable femoral stem prosthesis, characterized in that: include: Handle (11); A femoral neck prosthesis (12) is disposed at the proximal end of the handle body (11) and is rotatable relative to the handle body (11) around the axis of the handle body (11); The first driving component (13) is connected to the femoral neck prosthesis (12) and is used to drive the femoral neck prosthesis (12) to rotate.

2. The adjustable femoral stem prosthesis according to claim 1, characterized in that: The first driving assembly (13) comprises: A first rotating driving member (131); A first transmission component (132), wherein an input end of the first transmission component (132) is connected to a driving end of the first rotating driving member (131), and an output end of the first transmission component (132) is connected to the femoral neck prosthesis (12).

3. The adjustable femoral stem prosthesis according to claim 2, characterized in that: The first transmission assembly (132) comprises: A first rotating engagement member (1321) is sleeved on a driving end of the first rotating driving member (131); The second rotating engagement member (1322) is engaged with the first rotating engagement member (1321) and is fixed on the femoral neck prosthesis (12).

4. The adjustable femoral stem prosthesis according to claim 3, characterized in that: The femoral neck prosthesis (12) is provided with a connecting shaft (123), the handle body (11) is provided with an assembly hole (11a), and the connecting shaft (123) is rotatably assembled in the assembly hole (11a); The second rotating engagement member (1322) is sleeved on the connecting shaft (123).

5. The adjustable femoral stem prosthesis according to claim 1, characterized in that: The handle body (11) comprises: A distal handle body (111) having a first portion (1111) and a second portion (1112) connected to each other, wherein the first portion (1111) is used to extend into the femoral medullary cavity of a patient; and A proximal handle (112) is disposed around the outer periphery of the second portion (1112) and can move relative to the second portion (1112) toward or away from the first portion (1111); The adjustable femoral stem prosthesis (10) further comprises: The second driving assembly (14) is connected to the proximal handle body (112) and is used to drive the proximal handle body (112) to move.

6. The adjustable femoral stem prosthesis according to claim 5, characterized in that: The second driving assembly (14) comprises: A second rotation driving member (141); The motion conversion mechanism (142) is connected to the second rotary drive member (141) in driving connection, and is used to convert the rotation output of the second rotary drive member (141) into the linear motion of the proximal handle body (112).

7. The adjustable femoral stem prosthesis according to claim 6, characterized in that: The motion conversion mechanism (142) comprises: A threaded hole (1421) is provided on the second portion (1112); A threaded transmission member (1422) has one end threadedly connected to the threaded hole (1421) and the other end drivingly connected to the proximal handle body (112).

8. The adjustable femoral stem prosthesis according to claim 5, characterized in that: The second drive assembly (14) comprises a linear drive member (143), a main body of the linear drive member (143) is connected to the distal handle body (111), and a drive end of the linear drive member (143) is connected to the proximal handle body (112).

9. The adjustable femoral stem prosthesis according to claim 1, characterized in that: The femoral neck prosthesis (12) comprises: A connecting portion (121) connected to the proximal end of the handle body (11); and A neck (122) is disposed on the connecting portion (121) and is rotatable relative to the connecting portion (121) around a first rotation center line, wherein the first rotation center line is perpendicular to the axis of the handle body (11); The adjustable femoral stem prosthesis (10) further comprises: The third driving assembly (15) is connected to the neck (122) and is used to drive the neck (122) to rotate.

10. The adjustable femoral stem prosthesis according to claim 9, characterized in that: The third driving assembly (15) comprises: A third rotation driving member (151); A second transmission assembly (152), wherein an input end of the second transmission assembly (152) is connected to a driving end of the third rotating driving member (151), and an output end of the second transmission assembly (152) is connected to the neck (122).

11. The adjustable femoral stem prosthesis according to claim 10, characterized in that: The second transmission assembly (152) comprises: A third rotating engagement member (1521) is sleeved on a driving end of the third rotating driving member (151); The fourth rotating engagement member (1522) is engaged with the third rotating engagement member (1521) and is fixed on the neck (122).

12. The adjustable femoral stem prosthesis according to any one of claims 1 to 11, characterized in that: The adjustable femoral stem prosthesis (10) further comprises: A detection component (16) is arranged on the handle body (11) and / or the femoral neck prosthesis (12); the detection component (16) is used to detect the state parameters of the adjustable femoral stem prosthesis (10).

13. A femoral stem prosthesis system, characterized in that: include: An adjustable femoral stem prosthesis (10) as claimed in any one of claims 1 to 12; the adjustable femoral stem prosthesis (10) is provided with a power interface; A human-machine interaction device (20) for adjusting the adjustable femoral stem prosthesis (10); The signal transmission component (30) comprises a first connection end (31) and a second connection end (32), wherein the first connection end (31) is detachably connected to the power interface, and the second connection end (32) is connected to the human-machine interaction device (20).

14. The femoral stem prosthesis system according to claim 13, characterized in that: The human-computer interaction device (20) comprises: An input module (21) for inputting adjustment parameters of the adjustable femoral stem prosthesis (10); A signal processing and transmission module (22) is electrically connected to the input module (21); the signal processing and transmission module (22) is used to convert the adjustment parameter into an electrical signal and transmit it to the adjustable femoral stem prosthesis (10).

15. The femoral stem prosthesis system according to claim 14, characterized in that: The signal processing and transmission module (22) is also used to obtain a detection signal of the detection component (16) of the adjustable femoral stem prosthesis (10); The human-computer interaction device (20) further comprises: The display module (23) is electrically connected to the signal processing and transmission module (22).

16. A method for using the femoral stem prosthesis system according to any one of claims 13 to 15, characterized in that: include: Connecting the first connecting end of the signal transmission member to the power interface of the adjustable femoral stem prosthesis; adjusting the adjustable femoral stem prosthesis through the human-machine interaction device; Acquiring actual state parameters of the adjustable femoral stem prosthesis, and determining whether the actual state parameters meet preset conditions; If the actual state parameter does not meet the preset condition, repeatedly adjusting the adjustable femoral stem prosthesis until the actual state parameter meets the preset condition; If the actual state parameter meets the preset condition, the adjustment is terminated; Disconnect the first connection end from the power interface.

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