CN111529147B

CN111529147B - Bone force line determining device and joint surgery traction device applying same

Info

Publication number: CN111529147B
Application number: CN202010386956.5A
Authority: CN
Inventors: 史春宝; 郭静; 朱更博
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2022-09-30
Anticipated expiration: 2040-05-09
Also published as: CN111529147A

Abstract

The invention belongs to the technical field of medical instruments, and discloses a bone force line determining device for accurately determining the position of a force line and a joint surgery traction device applying the same, wherein the bone force line determining device comprises a first movable base plate which is vertically and slidably connected with a fixed foundation and a second movable base plate which is slidably connected with the first movable base plate and is provided with a force line hole, a through hole communicated with the force line hole is formed in the first movable base plate, a horizontal guide rod component connected with the first movable base plate and a vertical guide rod component connected with the second movable base plate, and the second movable base plate can drive the vertical guide rod component to move by horizontally sliding relative to the first movable base plate, so that the vertical guide rod component is adjusted on at least one side of a sagittal plane and determines the sagittal plane; the first movable base plate can vertically slide relative to the fixed base to drive the horizontal guide rod assembly and the vertical guide rod assembly to move, so that the horizontal guide rod assembly is adjusted on at least one side of the coronal plane and determines the coronal plane, and the axis of the force line hole is overlapped with the intersection line of the central coronal plane and the central sagittal plane when determining the force line.

Description

Bone force line determining device and joint surgery traction device applying same

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a bone force line determining device and a joint surgery traction device applying the same.

Background

In joint prosthesis replacement surgery, it is often necessary to locate the force line of the joint bone to ensure accuracy in the late medullary cavity opening and the position of the installed prosthesis, and in the case of the ankle joint, it is necessary to locate the force line of the tibia, i.e., the centerline of the tibia (generally considered to be the line of coincidence of the intersection of the median coronal plane and the median sagittal plane of the tibia).

The traction device for joint operation is used for traction and fixation of joints of human bodies before operation so as to find the most suitable position for opening a medullary cavity hole for accurate installation of a subsequent prosthesis. However, the prior art traction device for joint surgery only can realize the function of traction fixation, and for the determination of the tibial force line, an approximate force line position is determined by the visual observation of a doctor by using an X-ray film, so as to perform the operation of opening the medullary cavity and installing the prosthesis at the force line position.

Since the prior art can only roughly determine one force line location based on the clinical experience of the physician, the determined force line location is not accurate.

Disclosure of Invention

In order to more accurately determine the position of the force line, the invention provides a bone force line determining device and a joint surgery traction device applying the same.

The force line determination device of a bone according to the present invention comprises: the horizontal sliding of the second movable base plate relative to the first movable base plate can drive the vertical guide rod assembly to move in the horizontal direction, so that the vertical guide rod assembly can be adjusted and positioned on at least one side of the sagittal plane of a bone to determine the central sagittal plane of the bone; the first movable base plate can drive the horizontal guide rod assembly and the vertical guide rod assembly to move in the vertical direction simultaneously relative to the fixed base, so that the horizontal guide rod assembly can be adjusted and positioned on at least one side of the coronal plane of the bone to determine the central coronal plane of the bone, and under the condition that the force line determining device of the bone determines the force line, the axis of the force line hole is superposed with the intersection line of the central coronal plane and the central sagittal plane.

Further, the horizontal guide rod assembly includes two horizontal guide rods disposed in parallel and respectively located at both sides of the central coronal plane of the bone, and a first connection beam connecting the two horizontal guide rods, each of the horizontal guide rods vertically passing through the first guide hole of the first movable base plate.

Preferably, each horizontal guide rod may be configured to be fixedly connected with the first guide hole, and may also be configured to be capable of moving along the axial direction of the first guide hole.

Further, a free end of one of the two horizontal guide rods is formed with a first alignment part, and a free end of the other horizontal guide rod is formed with a first cavity opposite to the first alignment part, wherein an orthographic projection of the first alignment part is completely received in the first cavity in a state where the horizontal guide rod assembly determines a central coronal plane of the bone.

Further, the vertical guide rod assembly includes two vertical guide rods disposed in parallel while being located on one side of the central sagittal plane of the bone, and a second connection beam connecting the two vertical guide rods, each vertical guide rod vertically passing through the second guide hole of the second movable base plate.

Preferably, each vertical guide rod may be configured to be fixedly connected with the second guide hole, and may also be configured to be capable of moving along the axial direction of the second guide hole.

Further, a free end of one of the two vertical guide rods is formed with a second alignment part, and a free end of the other vertical guide rod is formed with a second cavity opposite the second alignment part, wherein an orthographic projection of the second alignment part is completely received in the second cavity in a state where the vertical guide rod assembly determines the central sagittal plane of the bone.

Furthermore, a first sliding groove is formed in one of the second movable substrate and the first movable substrate, a first sliding rail matched with the first sliding groove is formed in the other of the second movable substrate and the first movable substrate, and a first locking device used for penetrating through the first movable substrate to be abutted against the first movable substrate is formed on the second movable substrate so as to enable the second movable substrate to be tightly pressed on the first movable substrate.

Preferably, the top edge and the bottom edge of the first movable base plate are respectively provided with a first slot, and the second movable base plate is provided with a first slide rail lapped in the first slot.

Preferably, a second sliding groove is formed in one of the first movable base plate and the fixed base, a second sliding rail matched with the second sliding groove is formed in the other one of the first movable base plate and the fixed base, and a second locking device which penetrates through the first movable base plate to be abutted to the fixed base so as to press the first movable base plate on the fixed base is formed on the first movable base plate.

Preferably, two sides of the fixed base are respectively formed with a second slot, and the first movable base plate is formed with a second slide rail overlapped in the second slot.

The invention also provides a traction device for the joint surgery, which comprises: the support frame body assembly comprises a fixing plate used for positioning the joint and a force line determining device connected with the fixing plate and used for fixing the bone, wherein the first movable base plate is vertically and slidably connected with one surface of the fixing plate, the other surface of the fixing plate is used for fixing the joint, a guide groove is formed in the vertical direction of the fixing plate, and a horizontal guide rod of the horizontal guide rod assembly penetrates through the guide groove and can be slidably positioned along the guide groove.

Furthermore, the support frame body assembly further comprises a base and a side-turning support capable of rotating horizontally relative to the base, and the fixed plate is connected with the side-turning support so that the side-turning support can drive the fixed plate to turn on the side relative to the base when rotating horizontally.

Preferably, one of the bottom wall of the base and the bottom wall of the side-turning support may be formed with a first annular guide groove, and the other may be formed with a slider engaged with the first annular guide groove, and the slider may slide along the first annular guide groove to drive the side-turning support to rotate horizontally relative to the base.

Further preferably, a third locking device is formed on the bottom wall of the side-turning support and used for penetrating through the bottom wall of the side-turning support to abut against the bottom wall of the base so as to press the bottom wall of the side-turning support against the bottom wall of the base.

Furthermore, the side-turning support comprises an underframe and side frames, wherein the underframe is horizontally and rotatably connected with the base, the side frames are connected to two sides of the underframe, and the side frames are connected with the side walls of the fixed plate.

Preferably, the side frame may be formed with a second annular guide groove, and a fourth locking device for abutting against the lower bracket through the second annular guide groove to press the side frame against the lower bracket.

Further preferably, the fourth locking device is a threaded rod that slides along the second annular guide groove when the lower bracket is rotatably coupled with respect to the side frame.

Further, support the support frame body subassembly and still include along the orientation the direction of fixed plate sets gradually: the supporting seat is fixedly connected with the bottom wall of the base, the auxiliary supporting seat is fixedly connected with the bottom wall of the side-turning support, and the lapping seat is connected with the fixed plate.

Preferably, the bridge is horizontally slidably connected to the bottom of the fixed plate, the bridge comprising two opposite bridges which are movable and positionable horizontally relative to and away from each other to adjust the horizontal distance between the two bridges.

It is further preferred that the top of the fixed plate is further formed with a clamping seat, the clamping seat is in horizontal sliding connection with the fixed plate, the clamping seat comprises two opposite clamping portions, and the two clamping portions can be moved and positioned horizontally relative to each other and away from each other to adjust the horizontal distance between the two clamping portions.

Compared with the prior art, the device for determining the force line of the bone determines the positions of the central sagittal plane and the central coronal plane of the bone on the two sides of the bone respectively, the intersection line of the central sagittal plane and the central coronal plane can accurately position the force line of the bone, and the determined position of the force line is more accurate; make the tip of two horizontal guide rods have different structures through setting up first alignment part and first cavity, when observing both coincidences, can only observe the structure that both are different and can judge whether two horizontal guide rods coincide completely, judge that whether the process of two horizontal guide rods coincidence completely becomes simpler promptly, and the result of judgement is also corresponding more accurate.

Compared with the prior art, the joint operation traction device can realize the front-back overturning and the left-right overturning of the human body joint fixed on the fixing plate, and meanwhile, the joint operation traction device can be used for accurately determining the position of the force line of the tibia of the patient due to the arrangement of the bone force line determining device.

Drawings

FIG. 1 is an isometric view of a force line determining device of a bone according to an embodiment of the present invention, showing an anterior side of the force line determining device of the bone;

FIG. 2 is an isometric view of a force line determination device of a bone according to an embodiment of the present invention, showing a posterior side of the force line determination device of the bone;

FIG. 3 is a schematic front view of a force line determining apparatus for a bone according to an embodiment of the present invention installed on a fixation base;

FIG. 4 is a schematic view of the structure of the rear side of the force line determining apparatus of a bone mounted on a fixation base according to an embodiment of the present invention;

FIG. 5 is a schematic representation of a central sagittal plane and a central coronal plane of a bone, the line of intersection of the central sagittal plane and the central coronal plane being a force line;

FIG. 6 is a schematic diagram of force line determination using a bone force line determination device according to an embodiment of the present invention;

FIG. 7 is an enlarged view of the structure shown in FIG. 1 at A;

FIG. 8 is an enlarged view of the structure shown in FIG. 1 at B;

FIG. 9 is a schematic top view of a joint surgery distraction device according to an embodiment of the invention;

figure 10 is a right side schematic view of an articulating traction device according to an embodiment of the invention.

Detailed Description

For a better understanding of the objects, structure and function of the present invention, the bone force line determination device and the distraction device for arthroscopy using the same according to the present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 and 2 illustrate a structure of a force line determining apparatus 100 for a bone according to an embodiment of the present invention, and fig. 3 and 4 illustrate an installation diagram of the force line determining apparatus 100 for a bone according to an embodiment of the present invention on a fixed base. Referring to fig. 1 to 4, a force line determining apparatus 100 for a bone according to an embodiment of the present invention includes: the device comprises a first movable base plate 1 vertically and slidably connected with a fixed foundation 5, a second movable base plate 2 horizontally and slidably connected with the first movable base plate 1, a force wire hole 21 formed on the second movable base plate 2, a through hole 16 communicated with the force wire hole 21 formed on the first movable base plate 1, a horizontal guide rod assembly 3 connected with the first movable base plate 1, and a vertical guide rod assembly 4 connected with the second movable base plate 2. As shown in fig. 4, the horizontal sliding of the second movable base plate 2 relative to the first movable base plate 1 can drive the vertical guide rod assembly 4 to move in the horizontal direction X, so that the vertical guide rod assembly 4 can be adjusted and positioned on at least one side of the sagittal plane of the bone (i.e. the plane dividing the bone into the left and right parts along the length direction of the bone) as shown in fig. 5 to determine the central sagittal plane D of the bone (i.e. the plane equally dividing the bone into the left and right parts along the length direction of the bone); the vertical sliding of the first movable base plate 1 relative to the fixed base 5 can simultaneously drive the horizontal guide rod assembly 3 and the vertical guide rod assembly 4 to move in the vertical direction Y, so that the horizontal guide rod assembly 3 can be adjusted and positioned on at least one side of the coronal plane of the bone (i.e. the plane dividing the bone into an upper part and a lower part along the length direction of the bone) to determine the central coronal plane C of the bone (i.e. the plane dividing the bone into an upper part and a lower part along the length direction of the bone), and the axis of the force wire hole 21 coincides with the intersection line O of the central coronal plane D and the central sagittal plane C in the state that the force wire determining device 100 of the bone determines the force wire.

The process of determining the force line of the tibia by the bone force line determination apparatus 100 of the present invention will be described below with reference to fig. 1 to 4, in which the tibia of a human body is taken as an example: the operator fixes the patient's foot on the fixed base 5, with the axis of the tibia H (i.e. the line of force) perpendicular to the plane of the fixed base 5, as shown in fig. 6, the horizontal guide rod assembly 3 is located on the lateral side of the sagittal plane of the tibia H (i.e., the horizontal direction X of the tibial cross-section E shown in fig. 6), and the vertical guide rod assembly 4 is located on the lateral side of the coronal plane of the tibia (i.e., the vertical direction Y of the tibial cross-section E shown in fig. 6), at which time the operator may first look up the horizontal guide rod assembly 3 on the lateral side where the horizontal guide rod assembly 3 is located, it is possible to visually observe whether the horizontal guide rod assembly 3 is positioned at the center of the cross section E of the tibia H in the vertical direction Y, or shooting an X-ray film in the direction and observing whether the horizontal guide rod component 3 is positioned at the center of the cross section E of the tibia H in the vertical direction Y in a developing mode; then, the vertical guide rod assembly 4 is looked up in the same manner on the side on which the vertical guide rod assembly 4 is located, and it is observed whether the vertical guide rod assembly 4 is located at the center of the cross section E of the tibia H in the horizontal direction X.

If the vertical guide rod assembly 4 is not centered on the cross-section E of the tibia H in the horizontal direction X, the position of the vertical guide rod assembly 4 in the horizontal direction X needs to be adjusted, and in particular, a force may be applied to the second movable base plate 2 to cause the second movable base plate 2 to slide horizontally relative to the first movable base plate 1 to move the vertical guide rod assembly 4 in the horizontal direction X until the vertical guide rod assembly 4 is centered on the cross-section E of the tibia H in the horizontal direction X, at which time the position may be located to determine that the plane F (dashed line in fig. 6) in which the vertical guide rod assembly 4 is located coincides with the central sagittal plane D (solid line in fig. 6) of the bone. If the horizontal guide rod assembly 3 is not centered in the vertical direction Y of the cross-section E of the tibia H, the position of the horizontal guide rod assembly 3 in the vertical direction Y needs to be adjusted, specifically, on the basis that the vertical guide rod assembly 4 determines the central sagittal plane D of the bone, a force can be applied to the first movable base plate 1 to make the first movable base plate 1 vertically slide along the vertical direction Y relative to the fixed base 5, and at the same time, the horizontal guide rod assembly 3 and the vertical guide rod assembly 4 can be simultaneously driven to move along the vertical direction Y, such that the horizontal guide rod assembly 3 can be adjusted on at least one side of the coronal plane of the bone until the horizontal guide rod assembly 3 is centered in the vertical direction Y on the cross-section E of the tibia H, at which point the position can be positioned to determine that the plane G (dashed line shown in fig. 6) in which the horizontal guide rod assembly 3 lies coincides with the central coronal plane C (solid line shown in fig. 6) of the bone.

Thus, when the plane G in which the horizontal guide rod assembly 3 lies coincides with the central coronal plane C of the bone and the plane F in which the vertical guide rod assembly 4 lies coincides with the central sagittal plane D of the bone, the axis of the force-wire hole 21 coincides with the intersection O of the central coronal plane D and the central sagittal plane C, and therefore the axis of the force-wire hole 21 is the force line of the bone, and therefore the force line of the tibia H is determined.

The bone force line determining device 100 of the embodiment of the invention determines the positions of the central sagittal plane D and the central coronal plane G of the bone on the two sides of the bone respectively, the intersection line O of the two can accurately position the force line of the bone, and the determined position of the force line is more accurate.

Referring to fig. 2 to 4, the horizontal guide rod assembly 3 may include two horizontal guide rods 32 disposed in parallel and respectively located at both sides of the central coronal plane C of the bone, and a first connection beam 31 connecting the two horizontal guide rods 32, and each horizontal guide rod 32 may vertically pass through the first guide hole 11 of the first movable base plate 1. Through the arrangement, the horizontal guide rod 32 is always in a state of being perpendicular to the fixed base 5, so that the reference for determining the position of the tibia force line, namely the angle of the horizontal guide rod 32 is accurate, a series of subsequent systematic errors are avoided, and meanwhile, the arrangement of the two parallel horizontal guide rods 32 enables an observer to respectively observe two sides of the two horizontal guide rods 32, so that the plane G determined by the two horizontal guide rods 32 is a horizontal plane, and the position of the central coronal plane C is accurately determined.

Preferably, each horizontal guide rod 32 may be fixedly connected to the first guide hole 11, or may be configured to be movable in the axial direction of the first guide hole 11. When each horizontal guide rod 32 is fixedly connected with the first guide hole 11, the overall structural strength is higher; when each horizontal guide rod 32 is arranged to move along the axial direction of the first guide hole 11, the length of the part of the horizontal guide rod 32 extending out of the fixing base 5 can be adjusted, and therefore, the length of the part of the horizontal guide rod 32 extending out of the fixing base 5 can be adjusted to the most suitable size for patients with different tibia lengths.

As shown in fig. 7 and 8, the free end of one horizontal guide rod 32 of the two horizontal guide rods 32 may be formed with a first alignment part 321, and the free end of the other horizontal guide rod 32 may be formed with a first cavity 322 opposite to the first alignment part 321, wherein an orthographic projection of the first alignment part 321 may be completely received in the first cavity 322 in a state where the horizontal guide rod assembly 4 determines the central coronal plane C of the bone. Since it is necessary to observe whether or not the two horizontal guide rods 32 coincide from the side surface in order to reduce errors when determining whether or not the plane G in which the two horizontal guide rods 32 are located coincides with the coronal plane C, if it is observed whether or not the two horizontal guide rods 32 coincide with each other in the case where the two horizontal guide rods 32 have the same structure, it is easy to mistake that the two horizontal guide rods 32 do not coincide with each other completely due to the same structure of the ends thereof. By arranging the first alignment part 321 and the first cavity 322, the end parts of the two horizontal guide rods 32 have different structures, when observing whether the two horizontal guide rods are overlapped, only the different structures of the two horizontal guide rods can be observed, and here, whether the two horizontal guide rods 32 are completely overlapped can be judged only by observing whether the orthographic projection of the first alignment part 321 is completely accommodated in the first cavity 322 and whether the orthographic projection of the first alignment part 321 is positioned at the central position of the first cavity 322, namely, the process of judging whether the two horizontal guide rods 32 are completely overlapped becomes simpler, and the judgment result is correspondingly more accurate.

Preferably, the first cavity 322 may have a slotted structure as shown in fig. 8, and the first alignment part 321 may have a plate shape as shown in fig. 7. Further preferably, the slotted structure may be formed with stepped side walls as shown in fig. 8, with the central region of the slot being for aligning engagement with the plate-like first alignment member 321. The stepped sidewalls of the slotted structure help the operator to more clearly find and align the central region of the slot with the first alignment feature 321, thereby more accurately locating the central coronal plane C.

According to the force line determination apparatus 100 for a bone of the present invention, as shown in fig. 2 to 4, the vertical guide rod assembly 4 may include two vertical guide rods 41 disposed in parallel while being located on one side of the central sagittal plane D of the bone, and a second connection beam 42 connecting the two vertical guide rods 41, and each vertical guide rod 41 may vertically pass through the second guide hole 22 of the second movable base plate 2. Through the arrangement, the vertical guide rods 41 are always in a state of being perpendicular to the second movable base plate 2, so that the reference for determining the position of the tibial force line, namely the angle of the vertical guide rods 41 is accurate, a series of subsequent systematic errors are avoided, and meanwhile, the two parallel vertical guide rods 41 are arranged, so that an observer can respectively observe the two sides of the two vertical guide rods 41, the plane F determined by the two vertical guide rods 41 is as vertical as possible, and the position of the central sagittal plane D is accurately determined.

Similarly, each vertical guide rod 41 may be fixedly connected to the second guide hole 22, or may be movable in the axial direction of the second guide hole 22. When each vertical guide rod 41 is fixedly connected with the second guide hole 22, the overall structural strength is higher; when it is arranged that each vertical guide rod 41 moves in the axial direction of the second guide hole 22, the length of the portion of the vertical guide rod 41 protruding out of the second movable base plate 2 can be adjusted, and therefore the length of the portion of the vertical guide rod 41 protruding out of the second movable base plate 2 can be adjusted to the most appropriate size for patients of different tibia lengths.

As shown in fig. 3, the free end of one of the two vertical guide rods 41 is formed with a second alignment part 411 and the free end of the other vertical guide rod 41 is formed with a second cavity 412 opposite the second alignment part, wherein an orthographic projection of the second alignment part 411 is fully receivable in the second cavity 412 in a state in which the vertical guide rod assembly 4 defines the central sagittal plane D of the bone. The structure and function of the second alignment part 411 and the second cavity 412 may be the same as or similar to the first alignment part 321 and the first cavity 322 shown in fig. 7 and 8, and are not repeated herein.

It should be noted that the two vertical guiding rods 41 can be arranged in the manner shown in fig. 3 and fig. 6, that is, on one side of the coronal plane of the human bone (in combination with fig. 3, i.e., the side below with respect to the fixing base 5), and then the space on the other side of the coronal plane of the human bone (in combination with fig. 3, i.e., the space on the front side 5 of the fixing base) can be used for the operator to perform the bone cutting operation; it is of course possible to provide one vertical guide rod 41 on one side of the coronal plane of the human bone and another vertical guide rod 41 on the other side of the coronal plane of the human bone.

In the embodiment shown in fig. 4, one of the second movable substrate 2 and the first movable substrate 1 may be formed with a first sliding groove 12, the other may be formed with a first sliding rail 23 matching with the first sliding groove, and the second movable substrate 2 is formed with a first locking device 24 for passing through the first movable substrate 1 and abutting against the first movable substrate 1 to press the second movable substrate 2 against the first movable substrate 1. Through the arrangement, the second movable base plate 2 can move along the horizontal direction X relative to the first movable base plate 1, meanwhile, when the vertical guide rod assembly 4 moves to the center of the horizontal direction X of the cross section E of the tibia H, the position can be located and determined through the first locking device 24, the first sliding rail 23 moves along the preset first sliding groove 12 in the sliding process, and under the condition that the first sliding groove 12 and the first sliding rail 23 are well matched, the movement along the horizontal direction X is more accurate.

In another preferred embodiment, the first movable base plate 1 is formed with a first slot (i.e., the first sliding slot 12) at the top edge and the bottom edge, respectively, and the second movable base plate 2 is formed with a first sliding rail 23 overlapping the first slot. Through this arrangement, the second movable base plate 2 can slide smoothly in the horizontal direction X under the common limitation of the top edge and the bottom edge of the first movable base plate 1, and the second movable base plate 2 can be mounted and dismounted more conveniently relative to the first movable base plate 1.

Still taking fig. 4 as an example, one of the first movable substrate 1 and the fixed base 5 may be formed with a second sliding slot 52, and the other one may be formed with a second sliding rail 14 (as shown in fig. 1) engaged with the second sliding slot 52, and the first movable substrate 1 may be formed with a second locking device 15 for passing through the first movable substrate 1 to abut against the fixed base 5 so as to press the first movable substrate 1 against the fixed base 5. Through the arrangement, the first movable base plate 1 can move along the vertical direction Y relative to the fixed base 5, and when the horizontal guide rod assembly 3 moves to the center of the vertical direction Y of the cross section E of the tibia H, the position can be positioned and determined through the second locking device 15, the second sliding rail 14 moves along the preset second sliding groove 52 in the sliding process, and under the condition that the second sliding groove 52 is well matched with the second sliding rail, the movement along the vertical direction Y is more accurate.

In a preferred embodiment, the two lateral sides of the fixed base 5 may be respectively formed with a second slot (i.e., a second sliding slot 52), and the first movable base plate 1 may be formed with a second sliding rail overlapping in the second slot. Through this setting make first movable base plate 1 can follow vertical direction Y and steadily slide under the common limit on the left and right sides limit of fixed basis 5, and make first movable base plate 1 more convenient for the installation and the dismantlement of fixed basis 5.

As shown in fig. 9-10, the present invention also provides a traction device 200 for joint surgery, comprising: the supporting frame assembly 6 is used for performing traction fixation on the joint, the supporting frame assembly 6 comprises a fixing plate 61 for positioning the joint, and the force line determining device 100 of the bone connected with the fixing plate 61, wherein the first movable base plate 1 is vertically and slidably connected with one surface of the fixing plate 61, the other surface of the fixing plate 61 is used for fixing the joint, a guide groove 611 (shown in fig. 9) is formed in the vertical direction of the fixing plate 61, and the horizontal guide rod 32 of the horizontal guide rod assembly 3 passes through the guide groove 611 and can be slidably positioned along the guide groove 611.

The following describes the use of the traction device 200 for joint surgery according to the embodiment of the present invention by taking an ankle joint as an example, in which an operator fixes the foot of a patient on the fixing plate 61 and the ankle joint is supported by the support frame assembly 6, and since the traction device 200 for joint surgery according to the embodiment of the present invention is provided with the force line determination device 100 for bone, the position of the force line of the tibia of the patient can be accurately determined in the aforementioned manner using the traction device 200 for joint surgery according to the embodiment of the present invention.

Referring to fig. 9 and 10, the support frame assembly 6 may further include a base 62 and a side-turning bracket 63 capable of rotating horizontally relative to the base 62, and the fixing plate 61 is connected to the side-turning bracket 63, so that the side-turning bracket 63 drives the fixing plate 61 to turn on side when rotating horizontally relative to the base 1. Because the foot of the patient is fixedly connected with the fixing plate 61, when the ankle joint of the patient is different from the normal ankle joint, the side turning bracket 63 horizontally rotates relative to the base 1 to drive the ankle joint of the patient to turn on the side (namely, the ankle joint turns over in the left-right direction on the fixing plate 61 shown in fig. 9) so that the operator can adjust the ankle joint of the patient to the normal natural position, and the force line of the tibia can be conveniently determined subsequently.

In the embodiment shown in fig. 9, one of the bottom wall of the base 1 and the bottom wall of the rollover bracket 63 may be formed with a first annular guiding groove 637, and the other may be formed with a slider 613 engaged with the first annular guiding groove 637, and the slider 613 may slide along the first annular guiding groove 637 to drive the rollover bracket 63 to rotate horizontally relative to the base 1. The horizontal movement of the rollover bracket 63 relative to the base 62 can be realized by the cooperation of the sliding block 613 and the first annular guiding groove 637, and meanwhile, the first annular guiding groove 637 limits the movement track of the sliding block 613, so that the movement of the sliding block 613 in the first annular guiding groove 637 is more stable.

As shown in fig. 9, a third locking device 634 is formed on the bottom wall of the rollover bracket 63 to penetrate through the bottom wall of the rollover bracket 63 to abut against the bottom wall of the base 62, so as to press the bottom wall of the rollover bracket 63 against the bottom wall of the base 62. This arrangement allows the roll-over bracket 63 to be positioned by the third locking device 634 when it is moved horizontally into position relative to the base 62.

Referring to fig. 9 and 10, the side-tipping bracket 63 may include a base frame 631 (shown in fig. 10) horizontally rotatably connected to the base 62 and side frames 632 connected to both sides of the base frame 631, and the side frames 632 may be connected to the side walls of the fixed plate 61, wherein the support frame assembly 6 may further include a tipping bracket 64 connected to the fixed plate 61, the tipping bracket 64 may be located between the side frames 632 and the side walls of the fixed plate 61, and the tipping bracket 64 is rotatably connected to the side frames 632 such that the tipping bracket 64 may rotate relative to the side frames 632 to bring the fixed plate 61 to tipping. With this arrangement, the surgical traction device 200 of the present embodiment can not only adjust the lateral turning of the patient's ankle (i.e., the ankle is turned in the left-right direction on the fixing plate 61 as shown in fig. 9), but also adjust the supination of the patient's ankle (i.e., the ankle is dorsiflexed or plantarflexed in the forward-backward direction on the fixing plate 61 as shown in fig. 9). Under the combined action of the rollover bracket 63 and the supination bracket 64, the ankle joint of the patient can be adjusted to the same position as the normal ankle joint, so as to ensure the accuracy of the subsequent determination of the position of the tibial force line.

According to the present invention, as shown in fig. 10, a second annular guide groove 635 may be formed on the side frame 632, and a fourth locking device 636 may be inserted into the second annular guide groove 635 to abut against the lower bracket 64 so as to press the side frame 632 against the lower bracket 64. This arrangement allows the positioning by the fourth locking device 636 to be performed when the roll-on bracket 63 is moved into position relative to the fixed plate 61 by the lower bracket 64.

In a preferred embodiment, the fourth locking device 636 and the above-mentioned locking devices can both be locking screws.

As shown in fig. 9 and 10, the support frame assembly 6 may further include, in sequence in a direction toward the fixing plate 61: a supporting seat 65 fixedly connected with the bottom wall of the base 62, an auxiliary supporting seat 66 fixedly connected with the bottom wall of the side-turning support 64, and an overlapping seat 67 connected with the fixing plate 61. The joint seat 67 allows the joint portion of the patient to be fixed to the fixing plate 61, and the supporting seat 65 and the auxiliary supporting seat 66 are used to support different portions of the patient, respectively. Taking the ankle joint as an example, the supporting seat 65 can support the lower leg of the patient, the auxiliary supporting seat 66 can support the ankle joint of the patient, and the lapping seat 67 can support the heel of the patient. Preferably, the lap joint seat 67 is horizontally slidably connected with the bottom of the fixing plate 61, and the lap joint seat 67 may include two opposite lap portions 671, and the two lap portions 671 may be horizontally movable and positionable relative to and away from each other to adjust a horizontal distance between the two lap portions 671. Through this setting can adjust the horizontal distance between the overlap 671 according to the condition of different patients' heel to adapt to different patients, have more extensive suitability.

In the embodiment shown in fig. 9, the top of the fixing plate 61 is further formed with a clamping seat 68, the clamping seat 68 is horizontally slidably connected with the fixing plate 61, the clamping seat 68 comprises two opposite clamping portions 681, and the two clamping portions 681 can be horizontally moved and positioned relative to and away from each other to adjust the horizontal distance between the two clamping portions 681. Through this setting can adjust the horizontal distance between clamping part 681 according to the condition of the toe portion and sole of different patients so as to adapt to different patients, have more extensive suitability.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being covered by the appended claims and their equivalents. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A force-line determining apparatus for a bone, comprising:

a first movable base plate which is used for being vertically and slidably connected with the fixed base,

a second movable base plate horizontally connected with the first movable base plate in a sliding manner, wherein a force line hole is formed on the second movable base plate, a through hole communicated with the force line hole is formed on the first movable base plate,

a horizontal guide rod assembly connected with the first movable base plate, the horizontal guide rod assembly comprising two horizontal guide rods which are arranged in parallel and are respectively positioned at two sides of the central coronal plane of the bone and a first connecting beam for connecting the two horizontal guide rods, each horizontal guide rod vertically passes through the first guide hole of the first movable base plate, and

a vertical guide rod assembly connected to the second movable base plate, the vertical guide rod assembly including two vertical guide rods arranged in parallel while being located on one side of a central sagittal plane of a bone, and a second connection beam connecting the two vertical guide rods, each vertical guide rod passing perpendicularly through a second guide hole of the second movable base plate,

wherein horizontal sliding of the second movable base plate relative to the first movable base plate can drive the vertical guide rod assembly to move in a horizontal direction, such that the vertical guide rod assembly can be adjusted and positioned on at least one side of a sagittal plane of a bone to determine a central sagittal plane of the bone; the first movable base plate can drive the horizontal guide rod assembly and the vertical guide rod assembly to move in the vertical direction simultaneously through vertical sliding relative to the fixed base, so that the horizontal guide rod assembly can be adjusted and positioned on at least one side of a coronal plane of a bone to determine a central coronal plane of the bone, and under the condition that the force line determining device of the bone determines a force line, the axis of the force line hole is overlapped with an intersection line of the central coronal plane and the central sagittal plane.

2. The bone force line determination apparatus according to claim 1, wherein a free end of one of the two horizontal guide rods is formed with a first alignment part, and a free end of the other horizontal guide rod is formed with a first cavity opposite to the first alignment part, wherein an orthographic projection of the first alignment part is completely received in the first cavity in a state where the horizontal guide rod assembly determines a central coronal plane of the bone.

3. The force line determination device of a bone according to claim 1 or 2, wherein a free end of one of the two vertical guide rods is formed with a second alignment part and a free end of the other vertical guide rod is formed with a second cavity opposite to the second alignment part, wherein an orthographic projection of the second alignment part is completely received in the second cavity in a state where the vertical guide rod assembly determines the central sagittal plane of the bone.

4. The bone force line determining device according to claim 1 or 2, wherein one of the second movable base plate and the first movable base plate has a first slide groove formed thereon, and the other has a first slide rail formed thereon for engaging with the first slide groove, and the second movable base plate has a first locking device formed thereon for abutting against the first movable base plate through the first movable base plate to press the second movable base plate against the first movable base plate.

5. A traction device for joint surgery, comprising:

a support frame assembly for traction fixation of the joint, the support frame assembly comprising a fixing plate for positioning the joint, an

The bone force line determination apparatus according to any one of claims 1 to 4 connected to the fixation plate,

the first movable base plate is vertically connected with one surface of the fixed plate in a sliding mode, the other surface of the fixed plate is used for fixing a joint, a guide groove is formed in the vertical direction of the fixed plate, and a horizontal guide rod of the horizontal guide rod assembly penetrates through the guide groove and can be positioned along the guide groove in a sliding mode.

6. The arthrodesis distraction device of claim 5, wherein the support frame assembly further comprises a base and a rollover support that can rotate horizontally relative to the base, the fixed plate being connected to the rollover support such that horizontal rotation of the rollover support relative to the base causes the fixed plate to roll over.

7. The traction device as claimed in claim 6, wherein the side-tipping bracket comprises a bottom bracket connected to the base in a horizontal rotation manner and side brackets connected to both sides of the bottom bracket, the side brackets are connected to the side walls of the fixing plate, wherein the supporting bracket assembly further comprises a tipping bracket connected to the fixing plate, the tipping bracket is located between the side brackets and the side walls of the fixing plate, and the tipping bracket is connected to the side brackets in a rotation manner, so that the tipping bracket drives the fixing plate to tip upwards when rotating relative to the side brackets.

8. The arthrodesis distraction device of claim 6 or 7, wherein the support frame assembly further comprises, in order in a direction toward the fixation plate: the supporting seat is fixedly connected with the bottom wall of the base, the auxiliary supporting seat is fixedly connected with the bottom wall of the side-turning support, and the lapping seat is connected with the fixed plate.