Leg supporting instrument for hip replacement surgery

Abstract

The invention discloses a hip joint replacement operation leg supporting instrument which is placed on an operating bed during use and sequentially comprises a leg fixing support, an upper universal joint, a telescopic supporting rod, a lower universal joint and a support structure from top to bottom. The leg fixing support is used for at least supporting the thigh part, close to the knee joint, of the affected side leg; the telescopic supporting rod telescopically moves and is used for completing inward folding and outward unfolding actions, and the support structure forms a containing space for containing lower legs and is arranged on a bed body when used; the upper universal joint independently rotates to complete the actions of internal rotation and external rotation; and the lower universal joint and the upper universal joint are matched to rotate so as to complete buckling and stretching actions. The two universal joints are matched with one telescopic supporting rod to complete the actions of buckling and stretching, adduction and abduction, and internal rotation and external rotation; and when the telescopic supporting rod is in the locking state, the supporting effect is achieved, and when the two universal joints rotate independently or rotate together, an operator only needs to easily control the joints to rotate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a leg supporting device for hip replacement surgery. BACKGROUND

[0002] Hip replacement surgery, also known as artificial hip replacement, is a relatively mature and reliable treatment method in which an artificial prosthesis, including a femoral part and an acetabular part, is fixed on normal bone using bone cement and screws to replace the diseased joint and reconstruct the normal function of the patient's hip joint. Artificial joints were first used in the 1940s in foreign countries, and gradually developed in China after the 1960s.

[0003] During hip replacement surgery, the patient needs to maintain a lateral position for the surgery, and the medical staff needs to hold the patient's leg to adjust the hip joint activity to find the best surgical angle. After finding the correct angle, the angle needs to be maintained. Because the overall weight of the leg is large, the stability of the leg held by the medical staff is poor, and the surgery time for joint replacement is long. The medical staff will cause muscle stiffness if they hold the leg for a long time to maintain an angle, which is time-consuming and laborious. Sometimes, the medical staff needs to change the patient's leg or take a temporary break, and then needs to find the correct angle again, which reduces work efficiency, increases the difficulty and intensity of the surgery, and also wastes human resources.

[0004] The prior art CN 207286282 U hip replacement surgery body position frame is a structure arranged along the longitudinal axis of the leg and provided with a leg main support, a crotch support and a hip universal adjustment support. The core idea is to set a structure arranged along the longitudinal axis of the thigh and crotch to simulate leg movement. All activities of this method rely on the medical staff to hold and operate throughout the process. When the leg is suspended to find the angle, it is difficult to lock the leg position at the hip universal adjustment support position near the rotation center due to the large rotational torque. In order to reduce the impact, other structures need to be set to stabilize the position relationship. In addition, because it is a hip replacement surgery, the crotch support and the hip universal adjustment support are also likely to interfere with the surgical operation, making it difficult to be applied to hip replacement surgery in a lateral position. CN 215915536 U hip replacement support frame is a small structure arranged on the leg, which can only realize the problem of angle adjustment after the position is fixed. CN 216570720 U hip replacement surgery lower limb support is a lower limb support that can only adjust the height.

[0005] In the process of hip replacement surgery, the movement of the hip joint needs to be controlled to flexion and extension, adduction and abduction, internal rotation and external rotation, to find the best angle, but the existing technology cannot effectively assist medical staff to complete the flexion and extension, adduction and abduction, internal rotation and external rotation of the hip joint position of the patient in the lateral position surgery state, and save the medical staff's strength as much as possible in the process. SUMMARY

[0006] In the process of hip replacement surgery, the movement of the hip joint needs to be controlled to flexion and extension, adduction and abduction, internal rotation and external rotation, to find the best angle, but the existing technology cannot effectively assist medical staff to complete the flexion and extension, adduction and abduction, internal rotation and external rotation of the hip joint position of the patient in the lateral position surgery state, and save the medical staff's strength as much as possible in the process. The present application is characterized in that a universal joint is arranged above and below, a telescopic rod is arranged in the middle, a leg support is arranged above the upper universal joint, and a bracket structure with a lower leg accommodating space is arranged below the lower universal joint. During use, the bracket structure is placed on the lower leg, the lower leg is placed in the accommodating space, the upper leg is placed in the leg support, the internal rotation and external rotation are completed by the independent rotation of the upper universal joint, the flexion and extension are completed by the coordinated rotation of the lower universal joint and the upper universal joint, and the adduction and abduction are completed by the telescopic movement of the telescopic rod. Once the position and angle are determined, the rotation and telescopic movement are locked to maintain the state, and the bracket structure does not cause pressure to the lower leg, effectively protecting the lower leg.

[0007] A hip replacement surgery leg support device, which is placed on the operating bed during use and comprises, from top to bottom, a leg fixing support, an upper universal joint, a telescopic support rod, a lower universal joint, and a bracket structure.

[0008] The leg fixing support is used to support at least the thigh part of the affected leg near the knee joint. The telescopic support rod is used to complete the adduction and abduction movement, and comprises a telescopic locking structure and a rod body that is sleeved at both ends. The bracket structure forms an accommodating space for the lower leg, and is arranged on the bed body during use. The upper universal joint is connected with the leg fixing support and the first end of the telescopic supporting rod, and includes an upper universal ball head or an upper universal ball socket, a lower universal ball socket or a lower universal ball head connected with the leg fixing support, a lower universal ball socket or a lower universal ball head connected with the supporting structure, and a lower joint locking structure; the lower universal joint is rotated in cooperation with the upper universal joint to complete the flexion and extension action. The lower universal joint is connected with the leg fixing support and the first end of the telescopic supporting rod, and includes an upper universal ball head or an upper universal ball socket, a lower universal ball socket or a lower universal ball head connected with the leg fixing support, a lower universal ball socket or a lower universal ball head connected with the supporting structure, and a lower joint locking structure; the lower universal joint is rotated in cooperation with the upper universal joint to complete the flexion and extension action.

[0009] Further, the leg fixing support is C-shaped, and the leg of the patient near the knee joint is placed in the leg fixing support. A fixing belt can be further arranged on the leg fixing support to fix the leg and the leg fixing support.

[0010] Further, the distance between the lowermost part of the leg fixing support and the uppermost part of the supporting structure is 10-20 cm, and the telescopic range of the telescopic supporting rod is 15-20 cm, so that the leg of the patient can reach a maximum abduction distance of 40 cm, and the requirements of adduction and abduction are met.

[0011] Further, the telescopic supporting rod includes an upper telescopic rod and a lower telescopic rod, and the upper telescopic rod is connected with the lower telescopic rod in a sleeve manner. The lower telescopic rod is internally provided with a cylindrical cavity, the diameter of the upper telescopic rod is smaller than the diameter of the cylindrical cavity, and the lower telescopic rod is partially arranged in the upper telescopic rod. The upper telescopic rod can move up and down in the lower telescopic rod. The above arrangement ensures that the height of the leg fixing support is adjustable, and can be suitable for different patients and different leg activities.

[0012] Further, the telescopic locking structure is arranged in the following manner: a threaded channel one is arranged on the outer wall of the lower telescopic rod to the cylindrical cavity, and a locking screw one is arranged in the threaded channel. The first end of the locking screw one is in contact with the upper telescopic rod, and the first end of the locking screw one is provided with an operating handle one perpendicular to the screw. The operating handle one is rotated to make the locking screw one tightly contact the lower ball head to realize locking. Further, the operating handle one is in a horizontal state in the initial telescopic state of the upper telescopic rod and the lower telescopic rod, and the operating handle one is rotated downward by less than 90°, so that the upper telescopic rod and the lower telescopic rod change from the telescopic state to the locking state. Through this arrangement, the rotating state and the locking state can be switched very quickly.

[0013] Further, the upper joint locking structure is arranged in the following manner: the upper universal ball socket is connected with the telescopic support rod, the inner side of the universal ball socket is a ball socket cavity, the outer shape is a conical frustum structure, the diameter of the conical frustum structure uniformly increases from the lower side to the upper side along the axis of the support telescopic rod, a long strip opening is arranged on the vertebral body structure and penetrates into the ball socket cavity; the diameter of the lower end of the conical frustum structure is equal to the diameter of the upper telescopic rod; the outer side of the upper conical frustum structure is locked with a pipe, the first part of the pipe is sleeved on the outer side of the upper telescopic rod, the second part is sleeved on the outer side of the conical frustum structure, the inner side wall of the first part of the pipe is provided with a threaded structure, and a threaded section is also arranged on the outer side of the telescopic rod; when the pipe is rotated and moves upward, the size of the ball socket cavity is reduced, the rotation of the upper universal joint is locked, and the reverse rotation realizes unlocking.

[0014] Further, the support structure includes a platform structure, at least three support legs are arranged on both sides of the platform structure, and the space between the support legs on both sides is a lower leg accommodating space; when there are three support legs, two support legs are arranged on the first side and one support leg is arranged on the second side, and the one support leg on the second side is arranged in the middle of the support legs on the first side to form a stable triangular support structure. Four support legs can also be arranged, and two support legs are symmetrically arranged on each side.

[0015] Further, the single support leg includes a platform section connected with the platform structure and a vertical section vertically contacting the bed surface, wherein the vertical section is arranged as a vertical telescopic section and is provided with telescopic section locking structure; in this way, the adjustment according to the thickness of the lower leg of the patient can be realized.

[0016] Further, the lower joint locking structure is arranged in the following manner: a lower universal ball socket is arranged on the platform structure, and the lower universal ball socket is in a columnar structure; the inner side of the columnar structure has a ball socket cavity, a threaded channel two is arranged on the columnar structure from the outer side wall to the ball socket cavity, and a locking screw two is arranged in the threaded channel; the first end of the locking screw two is a contact ball head section, the second end of the locking screw two is provided with a vertical screw handle two, and rotating the locking screw two makes the locking screw two tightly contact the lower ball head to realize locking. Further, the handle is in a horizontal state in the initial rotation state of the ball head and the ball socket, the handle is downwardly rotated by less than 90°, and the ball head and the ball socket are changed from the rotation state to the locking state. Through this arrangement, the rotation state and the locking state can be switched very quickly.

[0017] The present application has the following advantages: the flexion and extension, adduction and abduction, internal rotation and external rotation movements are completed by cooperation of two universal joints and a telescopic support rod; when the telescopic support rod is in the locked state, it plays a more supporting role; when the two universal joints are rotated alone or together, the operator only needs to easily control the joint rotation, without consuming time to overcome gravity, and only needs to overcome gravity when performing telescopic movement, so that the operation is more simple and convenient in the low-cost support of pure mechanical design, and the flexibility of operation is higher.

[0018] By setting the leg fixing support as C type and setting the fixing belt, the angle adjustment caused by the rotation of the leg in the leg support after the device is locked can be avoided, which affects the operation.

[0019] By controlling the distance between the lowermost part of the leg fixing support and the uppermost part of the support structure and the extension range of the telescopic support rod, the requirement of the adduction and abduction range can be met while achieving a larger abduction distance.

[0020] By setting the screw channel and the locking screw extending into the internal cavity through the screw channel, and setting the operation handle on the locking screw, and controlling the operation handle to realize the switching between the locked and unlocked states within the 90° rotation range, the locking structure can ensure quick locking and unlocking, and increase the convenience of operation.

[0021] By rotating the locking pipe upward to lock the upper universal joint, the upper universal joint can be locked in a more stable state without being disturbed by the leg fixing support.

[0022] By setting the platform structure and the support structure of the support leg, the setting of all the structures above can be facilitated, and the lower leg can be provided with effective space with the simplest structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 2 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 3 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 4 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 3 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 5 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 6 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 5 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 7 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 6 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 8 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 6 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 9 The structure diagram of the leg support device for hip replacement surgery is shown only for the partial leg after the device is set to the leg; Figure 10 The schematic diagram of the part structure of the device without the bracket structure and the lower universal ball socket of the present application; Figure 11 The schematic diagram of the part structure between the leg fixing support and the bracket structure without the upper universal ball head, the lower universal ball socket and the locking pipe of the present application; Figure 12 The schematic diagram of the part structure between the leg fixing support and the bracket structure without the upper universal ball head, the lower universal ball socket and the locking pipe of the present application; Figure 13 The schematic diagram of the locking pipe structure of the present application; Figure 14 The schematic diagram of the bracket structure with the vertical section in the contracted state; Figure 15 The schematic diagram of the bracket structure with the vertical section in the extended state; Figure 16 The schematic diagram of the device of the present application controlling the internal rotation and external rotation, A is the internal rotation schematic diagram, and B is the external rotation schematic diagram; Figure 17 The schematic diagram of the device of the present application controlling the internal rotation and external rotation, A is the internal rotation schematic diagram, and B is the external rotation schematic diagram; Figure 18 The schematic diagram of the device of the present application controlling the internal rotation and external rotation, A is the internal rotation schematic diagram, and B is the external rotation schematic diagram; In the figure, 1 is the leg fixing support; 11 is the fixing belt; 12 is the short connecting rod; 13 is the soft buffer layer; 2 is the upper universal joint; 21 is the upper universal ball head; 22 is the conical structure; 23 is the long opening; 24 is the locking pipe; 3 is the telescopic supporting rod; 31 is the upper telescopic rod; 32 is the lower telescopic rod; 33 is the screw channel one; 34 is the locking screw; 35 is the operating handle; 4 is the lower universal joint; 41 is the lower universal ball head; 42 is the lower universal ball socket; 43 is the screw channel two; 44 is the locking screw two; 45 is the operating handle two; 5 is the bracket structure; 51 is the platform structure; 52 is the supporting leg; 521 is the horizontal section; 522 is the vertical section; 523 is the arc connecting part; 53 is the universal wheel; 61 is the lower leg; 62 is the affected side leg; and 7 is the operating bed. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application are clearly and completely described below through specific specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific embodiments, and the following embodiments and features in the embodiments can be combined with each other without conflict, and all other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application belong to the protection scope of the present application.

[0025] First, the movement modes of the hip joint are described, including six. Flexion movement, the thigh is lifted forward, the knee joint is close to the abdomen (such as "high leg" action), and the hip joint angle gradually decreases. Extension movement, the thigh is stretched backward, in a straight line or slightly backward with the trunk (such as "kicking leg backward"), and the hip joint angle gradually increases. Adduction movement, the thigh is close to the body midline (such as the action of the inner leg when "crossing legs"), avoiding excessive abduction. Abduction movement, the thigh is lifted to the outside of the body (such as "leg lifting sideways"), away from the body midline. Internal rotation movement, the thigh rotates inward around its long axis (the toes turn to the body midline, such as the preparatory action of "inward V-shaped legs"). External rotation movement, the thigh rotates inward around its long axis (the toes turn to the body midline, such as the preparatory action of "inward V-shaped legs"). The apparatuses of the following embodiments can support the legs during hip replacement surgery and complete the above-mentioned six movements by controlling the activities of the universal joints and the telescopic joints.

[0026] Reference Figures 1-18 A leg support apparatus for hip replacement surgery, when used, is placed on the operating bed 7, and from top to bottom, it is in turn a leg fixing support 1, an upper universal joint 2, a telescopic support rod 3, a lower universal joint 4 and a bracket structure 5.

[0027] The leg fixing support 1 is used to support at least the thigh part of the affected side leg 62 close to the knee joint position; The telescopic support rod 3 is used to complete the adduction and abduction movements, including two rod bodies that are mutually sleeved and telescopic locking structures; by adjusting the height change of the telescopic support rod 3, the distance between the two legs is increased to correspond to the abduction movement, and the distance between the two legs is reduced to correspond to the adduction movement; because they are all rotating around the hip joint, the angle will change during the movement, and then the upper universal joint 2 can be used to cooperatively adaptively follow the adjustment of the angle to ensure the comfort of the leg placement, and the locking position relationship is adjusted.

[0028] The support structure 5 is formed with a receiving space for accommodating the lower leg 61, and is arranged on the bed body in use; this part mainly forms a space for accommodating the lower leg 61 by using the support legs 52 on both sides, so that the device does not generate pressure on the lower leg 61 when it plays a supporting role.

[0029] The upper universal joint 2 has the leg fixing support 1 at the top and the telescopic support rod 3 at the bottom, and comprises the upper universal ball head 21 or the upper universal ball socket connected with the leg fixing support 1, the upper universal ball socket or the upper ball head connected with the first end of the telescopic support rod 3, and the upper joint locking structure; the upper universal joint 2 is independently rotated to complete the internal rotation and external rotation; the other parts of the support structure are not moved, and only the upper universal joint 2 is rotated, so that the rotation of the thigh around the long axis can be realized, and the rotation in different directions corresponds to the internal rotation and external rotation. It should be noted that the internal rotation and external rotation can be realized by fixing the leg in the leg fixing support 1 through the fixing belt 11.

[0030] The lower universal joint 4 has the telescopic support rod 3 at the top and the support structure 5 at the bottom, and comprises the lower universal ball head 41 or the lower universal ball socket 42 connected with the telescopic support rod 3, the lower universal ball socket 42 or the lower ball head connected with the support structure 5, and the lower joint locking structure; the lower universal joint 4 is cooperatively rotated with the upper universal joint 2 to complete the flexion and extension movement. Because the lower universal joint 4 is spaced apart from the leg fixing support 1 by a large distance, the cooperation of the lower universal joint 4 and the lower universal joint 4 can realize the flexion movement of the leg towards the abdomen and the extension movement of the leg away from the abdomen.

[0031] The flexion and extension, adduction and abduction, internal rotation and external rotation movements are completed by the cooperation of the two universal joints and the telescopic support rod 3; and when the telescopic support rod 3 is in the locked state, it plays a more supporting role, and when the two universal joints are independently rotated or cooperatively rotated, the operator only needs to easily control the joint rotation, without the need to consume time to overcome the gravity, and only needs to overcome the gravity when performing the telescopic movement, so that the operation is more simple and convenient in the low-cost support of the pure mechanical design, and the flexibility of the operation is higher.

[0032] The specific implementation of the leg fixing support 1 is as follows: Figures 2-6The leg fixing support 1 is C-shaped, the leg of the patient near the knee joint is placed in the leg fixing support 1, and a fixing belt 11 is further arranged on the leg fixing support 1, which is used for fixing the leg and the leg fixing support 1, so as to avoid that the angle is adjusted due to the rotation of the leg in the leg support after the device is locked, thereby affecting the operation of the surgery. Further, the length of the leg fixing support 1 ranges from 20 cm to 50 cm, which supports the large and small leg areas on both sides of the knee joint. This setting can further ensure that the leg maintains a straight state during operation, thereby facilitating the flexion and extension, adduction and abduction, and internal and external rotation of the hip joint. A soft buffer layer 13 is arranged in the leg fixing support 1, which increases the comfort of the leg placement.

[0033] In a more preferable embodiment, a reasonable distance between the lowermost part of the leg fixing support 1 and the uppermost part of the support structure 5 is arranged to ensure the arrangement of the two universal joints and the telescopic support rod 3, and to maintain the distance of the adduction and abduction movement. Specifically, the distance between the lowermost part of the leg fixing support 1 and the uppermost part of the support structure 5 ranges from 10 cm to 20 cm; the telescopic amplitude of the telescopic support rod 3 ranges from 15 cm to 20 cm; in this way, the leg of the patient can reach a maximum abduction distance of 40 cm, and the amplitude requirements of the adduction and abduction are met. A short connecting rod is arranged at the bottom of the leg fixing support 1, the first end of the short connecting rod 12 is fixedly connected with the leg fixing support 1, the second end of the short connecting rod 12 is provided with an upper universal ball, and the length of the short connecting rod is less than 3 cm. Through the arrangement of the short connecting rod, the ball socket and the ball socket can maintain a certain distance, but the length will not be too long, thereby affecting the telescopic amplitude of the telescopic rod between the leg fixing support 1 and the support structure 5, and further affecting the amplitude of the adduction and abduction movement. The telescopic support rod 3 can be an electric multi-segment telescopic rod, which is controlled by a remote control structure. In the case of increasing the telescopic amplitude, the multi-segment telescopic rod can reduce the distance between the lowermost part of the leg fixing support 1 and the uppermost part of the support structure 5, thereby better meeting the adduction and abduction movements in a wider range.

[0034] When the telescopic support rod 3 is in a mechanical control locking and unlocking mode, the specific implementation is as follows: Figure 4 、 Figure 6 And Figure 7; telescopic support rod 3 includes upper telescopic rod 31 and lower telescopic rod 32, upper telescopic rod 31 is connected with lower telescopic rod 32 in sleeve joint, lower telescopic rod 32 is internally provided with cylindrical cavity, the diameter of upper telescopic rod 31 is less than the diameter of cylindrical cavity, lower telescopic rod 32 is partially arranged in upper telescopic rod 31, upper telescopic rod 31 can move up and down in lower telescopic rod 32, the above-mentioned arrangement ensures that the height of leg fixing support 1 is adjustable, which can be suitable for different patients and different leg activities. The embodiment of telescopic locking structure is that a threaded channel 33 from the outer side wall to the cylindrical cavity is arranged on lower telescopic rod 32, and a locking screw 34-1 is arranged in the threaded channel; the first end of locking screw 34-1 is in contact with upper telescopic rod 31, and the first end of locking screw 34-1 is provided with a vertical screw operating handle 35-1, and rotating locking screw 34-1 makes locking screw 34-1 tightly contact lower ball head to realize locking. More specifically, the operating handle 35 is in a horizontal state in the initial telescopic state of upper telescopic rod 31 and lower telescopic rod 32, the operating handle 35 is rotated downward by less than 90°, and upper telescopic rod 31 and lower telescopic rod 32 change from telescopic activity state to locking state. Through this arrangement, the rotating state and the locking state can be switched very quickly.

[0035] The embodiment of the upper joint locking structure is that Figure 4 and Figure 6 , Figures 9-13 ; the upper universal ball socket connected with telescopic support rod 3 is internally a ball socket cavity, and the outer shape is a frustum structure, the diameter of frustum structure 22 uniformly increases from the lower part to the upper part along the axis of the support telescopic rod, and a long strip opening 23 penetrating into the ball socket cavity is arranged on the vertebral body structure; the diameter of the lowermost end of frustum structure 22 is equal to the diameter of upper telescopic rod 31; the outer side of upper frustum structure 22 is provided with a locking tube 24, the first part of locking tube 24 is sleeved on the outer side of upper telescopic rod 31, and the second part is sleeved on the outer side of frustum structure 22, the inner side wall of the first part of locking tube 24 is provided with a threaded structure, and a threaded segment is also arranged on the outer side of telescopic rod, and when locking tube 24 is rotated and moved upward, the size of the ball socket cavity is reduced, and the rotation of upper universal joint 2 is locked. The main reason for this arrangement is that upper universal joint 2 is arranged below the larger leg fixing support 1, if the locking is directly performed by a single locking rod inserted into the ball socket, the larger leg fixing support 1 will block the locking rod and affect the operation, in addition, because this position is farther away from the rotation center position, the torque is larger, and the force required to maintain non-rotation is larger, the axial holding mode can provide larger anti-rotation force to lock the rotation of the ball head and the ball socket, and the best locking effect is achieved.

[0036] The embodiment of support structure 5 is that Figures 14-15, the support structure 5 includes a platform structure 51, at least 3 support legs 52 extend from both sides of the platform structure 51, and the space between the support legs 52 on both sides is a lower leg 61 accommodating space; when there are 3 support legs 52, two are arranged on the first side and one is arranged on the second side, and the support leg 52 on the second side is arranged in the middle of the support legs 52 on the first side to form a stable triangular support structure. Four support legs 52 can also be arranged, with two support legs 52 arranged symmetrically on each side. The embodiment of the support leg 52 is that a single support leg 52 includes a platform segment connected to the platform structure 51, and a vertical segment 522 vertically contacting the bed surface, wherein the vertical segment 522 is arranged as a vertical telescopic segment, and a telescopic segment locking structure is arranged; the locking mode of the vertical telescopic segment is the same as the telescopic locking mode of the telescopic support rod 3, and of course other telescopic locking modes can be selected according to needs. In this way, adjustment can be made according to the thickness of the lower leg 61 of the patient. The platform segment is a horizontal segment 521, and an arc-shaped connecting part 523 is arranged at the connection between the horizontal segment 521 and the vertical segment 522; through this arrangement, the distance between the support legs 52 on both sides can be maximized, better meeting the needs of the patient. The horizontal segment 521 can also be arranged as a horizontal telescopic segment, so that adjustment is made in two directions to meet more leg accommodating needs.

[0037] A more preferred embodiment of the support structure 5 is that a universal wheel 53 is arranged on the vertical segment 522 of each support leg 52, and a brake structure is arranged on at least one universal wheel 53 on each side for locking the universal wheel 53. This arrangement can be used to compensate for the position by moving along the lower leg 61 when the cooperation of the two universal joints and one telescopic structure still cannot meet the needs by unlocking the brake of the universal wheel 53 during the operation.

[0038] The embodiment of the lower joint locking structure is that Figure 4 , Figure 6 and Figure 8 ; a lower universal ball socket 42 is arranged on the platform structure 51, and the lower universal ball socket 42 is in the form of a cylindrical structure; the inner side of the cylindrical structure has a ball socket cavity, a threaded channel two 43 is arranged on the outer wall of the cylindrical structure to the ball socket cavity, and a locking screw two 44 is arranged in the threaded channel two 43; the first end of the locking screw two 44 is a contact ball head segment, the second end of the locking screw two 44 is provided with a vertical screw handle two 45, and rotating the locking screw two 44 makes the locking screw two 44 tightly contact the lower ball head to realize locking. The handle 35 is in a horizontal state in the initial rotating state of the ball head and the ball socket, the handle 35 is turned downward by less than 90°, and the ball head and the ball socket change from the rotating state to the locking state. Through this arrangement, the rotating state and the locking state can be switched very quickly.

[0039] The specific instrument to complete the movement is that Figure 16, the apparatus control completes the adduction and abduction action schematic diagram, A is adduction schematic diagram, B is the outer rotation schematic diagram; can see that the use of telescopic support rod 3 telescopic makes the distance between the two legs increase or decrease, and then realize the adduction and abduction action, telescopic support rod 3 lengthening is when the abduction action occurs; telescopic support rod shortens when the adduction action occurs.

[0040] Reference Figure 17 , the apparatus control completes the internal rotation and external rotation action schematic diagram, A is internal rotation schematic diagram, B is the outer rotation schematic diagram; wherein mainly is the upper universal joint 2 towards different direction rotation realizes the internal rotation and external rotation movement.

[0041] Reference Figure 18 , the apparatus control completes the flexion and extension action schematic diagram, A is flexion schematic diagram, B is the extension schematic diagram; wherein mainly is the upper universal joint 2 and the lower universal joint 4 cooperation to reach the flexion and extension movement, if the flexion and extension movement amplitude is big, still can be through the telescopic support rod 3 lengthening to further cooperate to complete the flexion and extension movement of large amplitude, wherein mainly utilizes the lower universal joint 4 and the telescopic support rod 3 cooperation will leg part send to the flexion and extension movement position, utilizes the upper universal joint 2 cooperation guarantees the comfortable degree of leg part placement angle.

[0042] Finally through the above apparatus can guarantee in the case of no interference to the lower leg, using support apparatus to cooperate to carry out the related movement of hip joint, effectively save the difficulty of operator operation in the process, stop can quickly through locking and stop the thigh in the corresponding body position.

[0043] The above embodiment is only for understanding the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, the present application can be improved, and these improvements will also fall within the scope of the present application.

Claims

1. A leg support device for hip replacement surgery, placed on an operating table during use, comprising, from top to bottom, a leg fixation support, an upper universal joint, a telescopic support rod, and a lower universal joint and support structure; characterized in that, Leg support, used to support at least the thigh portion of the affected leg near the knee joint; Telescopic support rod, telescopic movement is used to complete inward and outward movements, including rods with two ends that are connected to each other and telescopic locking structure; The support structure forms a space to accommodate the legs below, and is installed on the bed frame during use; The upper universal joint has a leg support above it and a telescopic support rod below it. The upper universal joint includes an upper universal ball head or upper universal ball socket connected to the leg support, an upper universal ball socket or upper ball head connected to the first end of the telescopic support rod, and an upper joint locking structure. The upper universal joint can rotate independently to complete internal and external rotation movements. The lower universal joint has a telescopic support rod above it and a support structure below it. The lower universal joint includes a lower universal ball head or a lower universal ball socket connected to the telescopic support rod, a lower universal ball socket or a lower ball head connected to the support structure, and a lower joint locking structure. The lower universal joint works in conjunction with the upper universal joint to rotate and complete flexion and extension movements.

2. The leg support device according to claim 1, characterized in that, The leg support is C-shaped, and the patient's leg near the knee joint is placed inside the leg support; Preferably, a fixing strap is provided on the leg fixing bracket to fix the leg to the leg fixing bracket; Preferably, the length of the leg support is 20-50cm, and it is used to support the thigh and calf areas on both sides of the knee joint.

3. The leg support device according to claim 1, characterized in that, The distance between the bottom of the leg support and the top of the bracket structure is 10-20cm; the telescopic support rod has a telescopic range of 15-20cm. Preferably, a short connecting rod is provided at the bottom of the leg fixing support, the first end of the short connecting rod is fixedly connected to the leg fixing support, and the second end of the short connecting rod is provided with an upper universal ball. The length of the short connecting rod is less than 3cm. Preferably, the support telescopic rod is an electrically powered multi-segment telescopic rod.

4. The leg support device according to claim 1, characterized in that, The telescopic support rod includes an upper telescopic rod and a lower telescopic rod, which are connected by a sleeve. The lower telescopic rod has a cylindrical cavity inside, and the diameter of the upper telescopic rod is smaller than the diameter of the cylindrical cavity. The lower telescopic rod is partially set inside the upper telescopic rod, and the upper telescopic rod can move up and down inside the lower telescopic rod. The telescopic locking structure is set as follows: a threaded channel from the outer wall to the cylindrical cavity is provided on the lower telescopic rod, and a locking screw is provided in the threaded channel; the first end of the locking screw contacts the upper telescopic rod, and the first end of the locking screw is provided with an operating handle of a vertical screw; rotating the locking screw causes the locking screw to contact the lower ball head tightly to achieve locking. Preferably, when the upper and lower telescopic rods are in their initial telescopic state, the operating handle is in a horizontal state. When the operating handle is rotated downward by less than 90°, the upper and lower telescopic rods change from their telescopic state to a locked state.

5. The leg support device according to claim 1, characterized in that, The upper joint locking structure is configured as follows: The upper universal ball joint is connected to the telescopic support rod. The inner side of the universal ball joint is a ball-and-socket cavity with a frustum-shaped structure. The diameter of the frustum-shaped structure increases uniformly from bottom to top along the axis of the telescopic support rod. A long opening extends from the truncated cone structure into the ball-and-socket cavity. The diameter of the lowest point of the frustum-shaped structure is equal to the diameter of the upper telescopic rod. A locking tube is located on the outer side of the upper frustum-shaped structure. The first part of the locking tube is fitted onto the outer side of the telescopic support rod, and the second part is fitted onto the outer side of the frustum-shaped structure. The inner wall of the first part of the locking tube has a threaded structure, and a corresponding threaded section is also provided on the outer side of the telescopic support rod. When the locking tube rotates upwards, the size of the ball-and-socket cavity decreases, locking the rotation of the upper universal joint.

6. The leg support device according to claim 1, characterized in that, The support structure includes a platform structure with at least three support legs extending from both sides of the platform structure, and the space between the support legs on both sides is the space for accommodating the lower legs. Preferably, three support legs are provided, two on the first side and one on the second side, with the second support leg positioned in the middle of the first support leg to form a stable triangular support structure; or four support legs are provided, with two support legs symmetrically provided on each side.

7. The leg support device according to claim 6, characterized in that, The single support leg includes a platform section connected to the platform structure, and a vertical section that is in contact with the bed surface. The vertical section is configured as a vertical telescopic section and is equipped with a telescopic section locking structure. In this way, it can be adjusted according to the thickness of the patient's lower leg.

8. The leg support device according to claim 1, characterized in that, The platform segment is a horizontal segment, and an arc-shaped connecting part is provided at the connection between the horizontal segment and the vertical segment; preferably, the horizontal segment can also be set as a horizontal telescopic segment; Preferably, casters are provided on the vertical section of each support leg, and at least one caster on each side is provided with a brake structure to lock the movement of the casters.

9. The leg support device according to claim 6, characterized in that, The locking structure of the lower joint is configured as follows: a lower universal ball joint is provided on the platform structure, and the lower universal ball joint is a cylindrical structure; there is a ball joint cavity on the inner side of the cylindrical structure, and a second threaded channel from the outer wall to the ball joint cavity is provided on the cylindrical structure, and a second locking screw is provided in the threaded channel; the first end of the second locking screw is a contact ball head section, and the second end of the second locking screw is provided with a second operating handle of a vertical screw. Rotating the second locking screw causes the second locking screw to make close contact with the lower ball head to achieve locking.

10. The leg support device according to claim 9, characterized in that, When the ball head and socket are initially rotating, the operating handle is horizontal. When the operating handle is rotated downwards by less than 90°, the ball head and socket change from a self-rotating state to a locked state.

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