CN211534739U - External bone fixing device - Google Patents
External bone fixing device Download PDFInfo
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- CN211534739U CN211534739U CN201922057518.XU CN201922057518U CN211534739U CN 211534739 U CN211534739 U CN 211534739U CN 201922057518 U CN201922057518 U CN 201922057518U CN 211534739 U CN211534739 U CN 211534739U
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Abstract
The utility model provides a skeleton external fixation device, include: the near-end bracket is sleeved on the near-end skeleton at the skeleton fracture part; the far-end bracket is sleeved on the far-end skeleton at the bone fracture part; and the adjusting and connecting structure is connected with the near-end bracket and the far-end bracket and is used for adjusting the rigidity between the near-end bracket and the far-end bracket. The rigidity of the near-end support and the far-end support is adjusted by adjusting the connecting structure so as to adapt to the stress required by bone growth in different periods, the rapid adjustment of the stress condition of the bone is realized, the time of medical workers is saved, the position of the bone does not need to be confirmed by X-ray in the adjustment process, and the radiation of the medical workers and a patient is reduced.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a skeleton external fixation device.
Background
The existing external fixation brace for fixing bones is formed by connecting a plurality of parts such as annular parts, connecting rods, steel nail fixing parts and the like, the use process is that the parts are firstly combined and then connected with steel nails on the bones, then the bones are slowly adjusted to proper positions, and the adjustment process needs to be adjusted by the experience of doctors. For complex fracture, the position of the bone is required to be continuously confirmed by X-ray, the adjustment process is slow, the requirement on doctors is high, and doctors and patients are irradiated in the adjustment process to affect the health.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to provide an external bone fixation device that facilitates adjustment of bone position in order to solve the problem of slow adjustment process of bone position.
The above purpose is realized by the following technical scheme:
an external bone fixation device comprising:
the near-end support can be sleeved on a near-end skeleton at a skeleton fracture part and comprises a first left support and a first right support, and the first left support and the first right support are installed in a folding mode;
the far-end support can be sleeved on a far-end skeleton at the bone fracture position and comprises a second left support and a second right support, and the second left support and the second right support are installed in a folding mode; and
and the adjusting and connecting structure is connected with the near-end bracket and the far-end bracket and is used for adjusting the rigidity between the near-end bracket and the far-end bracket.
In one embodiment, the adjusting connection structure further includes a connection assembly connecting the proximal bracket and the distal bracket, and a rigidity adjusting assembly sleeved outside the connection assembly, wherein the connection assembly is used for adjusting the relative movement between the proximal bracket and the distal bracket, and the rigidity adjusting assembly is used for adjusting the rigidity between the proximal bracket and the distal bracket.
In one embodiment, the connecting assembly comprises a first connecting piece arranged on the near-end bracket and a second connecting piece arranged on the far-end bracket, and the first connecting piece and the second connecting piece are in telescopic connection.
In one embodiment, the rigidity adjusting assembly comprises an elastic piece and an adjusting piece, the elastic piece is sleeved on the first connecting piece and the second connecting piece, and the adjusting piece is movably sleeved on the first connecting piece or the second connecting piece and is abutted against one end of the elastic piece;
when the adjusting part compresses one end of the elastic part, the elastic force of the other end of the elastic part can enable the near-end support or the far-end support to move towards the direction away from each other, so that the near-end support and the far-end support are flexibly connected.
In one embodiment, the adjusting connection structure further comprises a locking member, which is disposed on the first connecting member and/or the second connecting member and is used for locking the first connecting member and/or the second connecting member to maintain the distance between the proximal bracket and the distal bracket;
when the locking piece is unlocked, the rigidity between the near-end bracket and the far-end bracket can be adjusted.
In one embodiment, the first connecting member is a first threaded member movably mounted on the proximal bracket, the second connecting member is a second threaded member having a through hole, the second threaded member is in threaded connection with the distal bracket, the first threaded member extends through the second threaded member, and the locking member is mounted on the extending end of the first threaded member and abuts against the second threaded member;
the adjusting piece and the elastic piece are located between the near-end support and the far-end support, the adjusting piece is rotatably installed on the second threaded piece, and the elastic piece is sleeved on the second threaded piece and respectively abutted against the adjusting piece and the near-end support.
In one embodiment, the number of the adjusting connecting structures is multiple, and the adjusting connecting structures are distributed at intervals along the periphery of the proximal bracket and the distal bracket.
In one embodiment, the joint of the first left bracket and the first right bracket is used for clamping and installing a half needle which can be fixed on the proximal bone; the second left support and the second right support are installed in a folding mode to form a complete support, and a joint of the second left support and the second right support is used for clamping and installing a half needle capable of being fixed to the far-end skeleton.
In one embodiment, the bone external fixation device further comprises a position detection element, wherein the position detection element is arranged on the proximal support and/or the distal support and is positioned between the proximal support and the distal support, and the position detection element is used for monitoring the relative position change of the proximal support and the distal support.
In one embodiment, the bone external fixation device further comprises an information transmission member, wherein the information transmission member is connected with the position detection member in a communication mode and is used for transmitting the information of the relative position change to external equipment.
After the technical scheme is adopted, the utility model discloses following technological effect has at least:
the utility model discloses a skeleton external fixation device, when fixed to the fracture department of patient's skeleton, locate the outside of fracture department near-end skeleton with the near-end support cover, locate the outside of fracture department distal end skeleton with the distal end support cover, and near-end support and distal end support are connected to the rethread through adjusting connection structure. When a patient is in the initial stage of fracture, the adjusting structure is connected with the near-end support and the far-end support, the near-end support and the far-end support are rigidly connected, the bone is gradually healed, relative activity between the near-end support and the far-end support can be achieved by adjusting the connecting structure, rigidity between the near-end support and the far-end support is reduced, stress stimulation on the bone is adjusted according to the growth condition of the bone, and the bone growth is facilitated. The utility model discloses a skeleton external fixation device adjusts the rigidity of near-end support and distal end support through adjusting connection structure, and the slow problem of the present skeleton position adjustment process of effectual solution realizes the quick adjustment of the skeleton atress condition, saves medical personnel's time to, the adjustment in-process need not to confirm the skeleton position through X-ray, reduces the radiation that medical personnel and patient received.
Drawings
Fig. 1 is a perspective view of an external skeletal fixation device in accordance with an embodiment of the present invention;
FIG. 2 is an exploded view of the external bone fixation device shown in FIG. 1;
FIG. 3 is a schematic view of the external skeletal fixation device of FIG. 1 mounted to a lower limb skeleton;
FIG. 4 is an exploded view of an adjustment linkage of the external bone fixation device of FIG. 1;
FIG. 5 is a schematic partial cross-sectional view of the external bone fixation device of FIG. 1 wherein the adjustment linkage rigidly connects the proximal and distal brackets;
FIG. 6 is a schematic partial cross-sectional view of the external bone fixation device of FIG. 1 wherein the adjustment linkage flexibly couples the proximal and distal brackets;
fig. 7 is a perspective view of the external bone fixation device shown in fig. 3 from another angle.
Wherein:
100-external skeletal fixation devices;
110-a proximal stent;
111-a first left brace;
112-a first right support;
120-a distal stent;
121-a second left brace;
122-a second right bracket;
130-adjusting the connection structure;
131-a connection assembly;
1311-a first connector;
1312-a second connection;
132-a stiffness adjustment assembly;
1321-an elastic member;
1322-an adjustment member;
133-a locking member;
140-position detection member;
200-steel needle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the bone external fixation device of the present invention will be further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 to 3, the present invention provides an external skeletal fixation device 100. The external skeleton fixing device 100 is suitable for accurately fixing the steel needle 200 on the skeleton of the fractured part of a patient so as to ensure that the proximal skeleton and the distal skeleton at the fractured part are accurately butted. It is understood that proximal bone refers to bone at a fracture that is relatively closer to the body, and proximal bone refers to bone at a fracture that is relatively further from the body. Taking the lower limb skeleton as an example, the upper segment of the lower limb skeleton is a proximal skeleton, and the lower segment is a distal skeleton. Of course, the bone external fixation device 100 of the present invention may also be applied to an arm bone, etc. The utility model discloses a quick adjustment of skeleton atress condition can be realized to skeleton external fixation device 100, makes things convenient for medical personnel's operation, saves medical personnel's time to, need not to confirm the skeleton position through X-ray in the adjustment process, reduce the radiation that medical personnel and patient received.
In one embodiment, the external skeletal fixation device 100 includes a proximal support 110, a distal support 120, and an adjustment connection structure 130. The proximal bracket 110 is sleeved on the proximal bone at the bone fracture. The distal bracket 120 is sleeved on the distal skeleton at the fracture of the skeleton; adjustment connection 130 connects proximal bracket 110 and distal bracket 120 for adjusting the amount of relative movement between proximal bracket 110 and distal bracket 120 to adjust the stiffness between proximal bracket 110 and distal bracket 120. The proximal bracket 110 is used to mount the steel needle 200 fixed to the proximal bone, and the distal bracket 120 is used to mount the steel needle 200 fixed to the distal bone.
It will be appreciated that after fracture of the bone, the bone will break into two ends, with the proximal portion of the bone adjacent to the body being proximal and the distal portion of the bone distal to the body being distal. In order to ensure that the proximal bone and the distal bone can be accurately butted, the steel needle 200 is required to be arranged on both the proximal bone and the distal bone, and then the distal bone is moved through the steel needle 200, so that the distal bone is accurately butted to the proximal bone, and the bone is accurately restored. The position of the steel needle 200 is fixed by the above-mentioned proximal bracket 110 and distal bracket 120. The proximal bracket 110 and the distal bracket 120 can ensure that the fixed position of the steel needle 200 is accurate, thereby ensuring that the bone is accurately reset.
The proximal bracket 110 has a ring-shaped cross-sectional shape and a height in the axial direction. The distal holder 120 has a cross-sectional shape of a ring and has a certain height in the axial direction. The distal end bracket 120 and the proximal end bracket 110 are hollow, so that the weight of the proximal end bracket 110 and the distal end bracket 120 can be reduced under the condition of ensuring a certain bearing capacity. The proximal bracket 110 is sleeved outside the proximal bone, and the steel needle 200 of the proximal bracket 110 is fixed on the proximal bone. The distal end support 120 is sleeved outside the distal end bone, and the steel needle 200 on the distal end support 120 is fixed on the distal end bone. Then, the distal frame 120 is connected to the proximal frame 110, and in the process, the distal frame 120 drives the distal bone to move towards the proximal bone through the steel needle 200, so that the proximal bone is butted with the distal bone, and the reduction of the proximal bone and the distal bone is completed.
In the early stage of the bone, the fracture part cannot be stressed, and stress stimulation is applied to the fracture part of the fracture during the process of healing between the bones. Therefore, the bone external fixation device 100 of the present invention further comprises an adjusting connection structure 130, wherein the adjusting connection structure 130 connects the proximal bracket 110 and the distal bracket 120. The adjusting connection structure 130 can adjust the relative movement amount between the proximal support 110 and the distal support 120, and the relative movement amount can be used to adjust the rigidity between the proximal support 110 and the distal support 120, so that the connection relationship between the proximal support 110 and the distal support 120 can be adapted to the bone growth conditions in different periods. Specifically, in the early stage of the bone, the connecting structure 130 is adjusted so that there is no relative movement between the proximal bracket 110 and the distal bracket 120, and the proximal bracket 110 and the distal bracket 120 are rigidly connected through the adjusting connecting structure 130. After the proximal and distal bones have grown to heal for a period of time, connecting structure 130 is adjusted so that there is a relative amount of activity between proximal stent 110 and distal stent 120 to reduce the stiffness between proximal stent 110 and distal stent 120.
In this embodiment, a lower limb skeleton is taken as an example, as shown in fig. 3. When a patient walks, the weight of the body is concentrated on the legs, and if the legs are stressed, the healing of the bones at the fracture part is influenced. After the adjustment connecting structure 130 is added, in the early stage of the skeleton, the adjustment connecting structure 130 makes the proximal bracket 110 and the distal bracket 120 rigidly connected, and the weight of the body is transmitted from the proximal skeleton to the proximal bracket 110 through the steel needle 200, then transmitted to the distal bracket 120 through the adjustment connecting structure 130, and transmitted from the distal bracket 120 to the distal skeleton through the steel needle, and then transmitted to the sole. In this way, stress stimuli from the bone are not transmitted to the fracture site. After the proximal and distal bones grow and heal for a period of time, the adjusting connection structure 130 enables the proximal and distal brackets 110 and 120 to be flexibly connected, one part of the body weight can be directly transmitted from the proximal bone to the distal bone at the fracture site, and the other part of the body weight can be transmitted from the proximal bone to the proximal bracket 110 through the steel needle 200, then transmitted to the distal bracket 120 through the adjusting connection structure 130, and transmitted from the distal bracket 120 to the distal bone through the steel needle, and then transmitted to the sole of the foot. Therefore, the fracture part bears partial stress stimulation, the growth of bones is facilitated, and the problems of osteoporosis and the like can be avoided.
The external bone fixation device 100 of the above embodiment connects the proximal bracket 110 and the distal bracket 120 by adjusting the connection structure 130, and adjusts the relative movement amount of the proximal bracket 110 and the distal bracket 120, so that the rigid connection relationship between the proximal bracket 110 and the distal bracket 120 can adapt to the growth conditions of different periods during bone fracture, thereby ensuring smooth bone healing. Rigidity between the near-end support 110 and the far-end support 120 is adjusted through adjusting the connecting structure 130, the problem that the adjusting process of the current skeleton position is slow can be effectively solved, the stress condition of the skeleton can be quickly adjusted, time of medical staff is saved, the skeleton position does not need to be confirmed through X-rays in the adjusting process, and radiation of the medical staff and a patient is reduced.
Referring to fig. 1 to 6, in an embodiment, the adjusting connection structure 130 further includes a connection assembly 131 connecting the proximal bracket 110 and the distal bracket 120, and a rigidity adjusting assembly 132 sleeved outside the connection assembly 131, wherein the connection assembly 131 is used for adjusting the relative movement between the proximal bracket 110 and the distal bracket 120, and the rigidity adjusting assembly 132 is used for adjusting the rigidity between the proximal bracket 110 and the distal bracket 120. The connection assembly 131 has one end connected to the proximal bracket 110 and the other end connected to the distal bracket 120, and the connection assembly 131 can adjust the distance between the proximal bracket 110 and the distal bracket 120. Meanwhile, the rigidity between the proximal bracket 110 and the distal bracket 120 is adjusted by the rigidity adjusting component 132, so that the stress condition between the proximal bracket 110 and the distal bracket 120 can adapt to the growth conditions of bones in different periods.
In the initial stage of the fracture, the rigid adjusting member 132 is not operated, and the connecting member 131 rigidly connects the proximal bracket 110 and the distal bracket 120, so that the external skeletal fixation device 100 can bear the weight of the body and the stress stimulation of the bone is not transmitted to the fracture site. During the process of gradually healing the bone, the rigidity adjusting component 132 enables relative movement between the proximal bracket 110 and the distal bracket 120, and the connecting component 131 can be extended and retracted within the range of the relative movement, at this time, the rigidity adjusting component 132 is adjusted to enable the rigidity between the proximal bracket 110 and the distal bracket 120 to be reduced, and the proximal bracket 110 and the distal bracket 120 can be relatively moved within the range of the relative movement through the rigidity adjusting component 132 to enable the flexible connection between the proximal bracket 110 and the distal bracket 120. Thus, the external skeletal fixation device 100 can share part of the body weight, and the gradually healed skeleton shares part of the body weight, so that the skeleton at the fracture part is subjected to stress stimulation to facilitate the growth of the skeleton.
In one embodiment, the connecting assembly 131 includes a first connecting member 1311 disposed on the proximal bracket 110 and a second connecting member 1312 disposed on the distal bracket 120, wherein the first connecting member 1311 and the second connecting member 1312 are telescopically coupled. The end of the proximal bracket 110 facing the distal bracket 120 has a first mounting hole, the end of the distal bracket 120 facing the proximal bracket 110 has a second mounting hole, the first connector 1311 is mounted in the first mounting hole, and the second connector 1312 is mounted in the second coupling hole. The first connecting member 1311 is nested with the second connecting member 1312, and the first connecting member 1311 is nested in the second connecting member 1312, and the second connecting member 1312 is nested in the first connecting member 1311. Second link 1312 is telescopically movable relative to first link 1311 to accommodate the amount of relative movement between proximal bracket 110 and distal bracket 120.
Also, the stiffness adjusting assembly 132 is disposed outside the first connector 1311 and the second connector 1312. When the distance between the first connector 1311 and the second connector 1312 is minimal and can no longer be retracted, the proximal bracket 110 and the distal bracket 120 are rigidly connected, no relative movement can occur between the proximal bracket 110 and the distal bracket 120, and the rigid adjustment assembly 132 is inactive. When there is a relative amount of movement between proximal frame 110 and distal frame 120, the position of stiffness adjustment assembly 132 is adjusted such that first connector 1311 and second connector 1312 can extend relative to each other and abut proximal frame 110, and stiffness adjustment assembly 132 reduces the stiffness between proximal frame 110 and distal frame 120.
In the initial stage of fracture, there is no relative movement between the proximal support 110 and the distal support 120, and at this time, the proximal support 110 and the distal support 120 are rigidly connected by the first connector 1311 and the second connector 1312. In this way, the external skeletal fixation device 100 may bear the weight of the body and the stress stimuli of the skeleton are not transmitted to the fracture site. During gradual bone healing, first connector 1311 and second connector 1312 are adjusted such that there is a relative amount of movement between proximal frame 110 and distal frame 120, and then the position of stiffness adjustment assembly 132 outside of first connector 1311 and second connector 1312 is adjusted, at which time stiffness adjustment assembly 132 may provide a flexible connection between proximal frame 110 and distal frame 120. Thus, the first connecting member 1311 can stretch and contract relative to the second connecting member 1312 after being stressed, and the external bone fixation device 100 can share part of the body weight, and the gradually healed bone shares part of the body weight, so that the bone at the fracture part is stressed and stimulated to facilitate bone growth.
In one embodiment, the stiffness adjustment assembly 132 includes an elastic component 1321 and an adjustment component 1322, the elastic component 1321 is disposed on the first connecting component 1311 and the second connecting component 1312, and the adjustment component 1322 is movably disposed on the first connecting component 1311 or the second connecting component 1312 and abuts against an end of the elastic component 1321. When adjusting member 1322 compresses one end of elastic member 1321, the elastic force of the other end of elastic member 1321 can move proximal holder 110 or distal holder 120 away from each other, so that proximal holder 110 and distal holder 120 are flexibly connected.
After the elastic element 1321 is sleeved on the first connecting element 1311 and the second connecting element 1312, one end of the elastic element 1321 abuts against the adjusting element 1322, the other end of the elastic element 1321 abuts against the proximal bracket 110, and the adjusting element 1322 is located between the elastic element 1321 and the distal bracket 120. When proximal bracket 110 and distal bracket 120 are rigidly connected, elastic member 1321 is in a free state, adjusting member 1322 is located below elastic member 1321, the elastic force of elastic member 1321 does not act on proximal bracket 110, and proximal bracket 110 and distal bracket 120 are rigidly connected through first connecting member 1311 and second connecting member 1312. When it is desired to reduce the rigid connection between proximal bracket 110 and distal bracket 120, first connecting bracket and second connecting member 1312 are extended relative to each other so that there is a relative amount of movement between proximal bracket 110 and distal bracket 120, and then adjusting member 1322 is moved upward to compress elastic member 1321 so that the elastic force of elastic member 1321 can act on proximal bracket 110, and elastic member 1321 can act as a buffer to flexibly connect proximal bracket 110 and distal bracket 120.
During the gradual bone healing process, the first connecting element 1311 and the second connecting element 1312 are adjusted to allow relative movement between the proximal bracket 110 and the distal bracket 120, and at the same time, the position of the adjusting element 1322 is adjusted to allow the adjusting element 1322 to compress the elastic element 1321, so that the other end of the elastic element 1321 applies elastic force to the proximal bracket 110. Thus, due to the flexible connection of the elastic element 1321, one part of the body weight can be concentrated on the external skeletal fixation device 100, and the other part can be directly transmitted from the proximal skeleton to the distal skeleton at the fracture site. In this way, the fracture of the skeleton bears stress stimulation in the process of gradual healing, and the bone growth is facilitated.
Alternatively, the elastic member 1321 includes, but is not limited to, a spring, a bellows, and the like, and may be other members having an elastic function.
Of course, in other embodiments of the present invention, the rigidity adjustment assembly 132 may be other components capable of achieving flexible connection between the proximal bracket 110 and the distal bracket 120.
In one embodiment, the adjustment connection structure 130 further comprises a locking member 133, wherein the locking member 133 is disposed on the first connecting member 1311 and/or the second connecting member 1312 for locking the first connecting member 1311 and/or the second connecting member 1312 to maintain a predetermined gap between the proximal bracket 110 and the distal bracket 120. When the locking member 133 is unlocked, the first connecting member 1311 and the second connecting member 1312 are retractable. The locking element 133 can adjust the relative position between the proximal bracket 110 and the distal bracket 120 to maintain the proximal bracket 110 and the distal bracket 120 in the corresponding state.
After the first connector 1311 and the second connector 1312 are connected to the proximal bracket 110 and the distal bracket 120 at the initial stage of fracture, the first connector 1311 and the second connector 1312 are locked by the locking member 133, so that the relative position between the first connector 1311 and the second connector 1312 is locked and fixed, and the proximal bracket 110 and the distal bracket 120 form a stable rigid structure. When the rigidity of proximal bracket 110 and distal bracket 120 needs to be adjusted, locking element 133 is unlocked, the positions of first connecting element 1311 and second connecting element 1312 are adjusted so that there is relative movement between proximal bracket 110 and distal bracket 120, first connecting element 1311 and second connecting element 1312 are locked by locking element 133, and the position of elastic element 1321 is adjusted by adjusting element 1322 so that the rigidity between proximal bracket 110 and distal bracket 120 is reduced.
In one embodiment, the first coupling member 1311 is a first threaded member movably mounted to the proximal bracket 110, the second coupling member 1312 is a second threaded member having a through hole, the second threaded member is threadedly coupled to the distal bracket 120, the first threaded member extends through the second threaded member, and the locking member 133 is mounted to the extending end of the first threaded member and abuts against the second threaded member. The adjusting member 1322 and the elastic member 1321 are located between the proximal bracket 110 and the distal bracket 120, the adjusting member 1322 is rotatably mounted on the second threaded member, and the elastic member 1321 is sleeved on the second threaded member and abuts against the adjusting member 1322 and the proximal bracket 110, respectively.
In one embodiment, first connector 1311 is a long screw and second connector 1312 is a cannulated screw. The adjusting member 1322 is an adjusting nut and the locking member 133 is a locking nut. The long screw passes through the first mounting hole of the proximal bracket 110, and the hollow screw is threadedly coupled with the distal bracket 120. The long screw may move up and down in the first mounting hole with respect to the proximal bracket 110, and the cannulated screw may move up and down with respect to the proximal bracket 110 via a threaded connection. The elastic member 1321 is sleeved outside the hollow screw, and the adjusting nut is mounted on the hollow screw and located at the lower end of the elastic member 1321. The amount of compression of the resilient member 1321 can be adjusted as the adjustment nut is rotated relative to the cannulated screw. The long screw penetrates through the through hole of the hollow screw to extend out, and the locking nut is installed at the extending end of the long screw.
As shown in fig. 5, when the external bone fixation device 100 is fixedly locked, a cannulated screw is screwed in from the lower end of the distal bracket 120, an adjustment nut and an elastic member 1321 are installed on the cannulated screw, then a long screw is inserted from the upper end of the cannulated screw, and finally a locking nut is tightened from the bottom end of the long screw. At this time, the upper surface of the bottom of the hollow screw is tightly attached to the lower surface of the distal end support 120, the elastic member 1321 maintains a free state between the proximal end support 110 and the distal end support 120, the elastic member 1321 does not generate an elastic force, the relative position of the long screw and the hollow screw is fixed and locked, and the proximal end support 110 and the distal end support 120 are of a stable rigid structure.
As shown in fig. 6, during the process of bone healing, the external force of the patient's own movement is required to stimulate the bone growth, and at this time, the rigidity between the proximal bracket 110 and the distal bracket 120 is required to be reduced to ensure that the fractured bone can be subjected to stress stimulation. Specifically, the locking nut is firstly unscrewed by 0.5 mm-1 mm, then the hollow screw is unscrewed by 0.5 mm-1 mm, and the screwing-off distance between the locking nut and the hollow screw is equal. At this time, the proximal stent 110 has an activity of 0.5mm to 1mm with respect to the distal stent 120. Then, the adjusting nut is rotated, the elastic element 1321 is compressed towards the proximal bracket 110, and the pressure of the elastic element 1321 can be adjusted, so as to adjust the rigidity between the proximal bracket 110 and the distal bracket 120. It will be appreciated that the spring force generated by the spring element 1321 can be adjusted by adjusting the position of the adjustment element 1322 to meet the stress requirements for bone growth at different times, thereby achieving adjustability of the stiffness. In addition, the locking nut may also be rotated to apply artificial loads to the bone, which may be stressed as desired by the surgeon.
Of course, in other embodiments of the present invention, the first connecting member 1311 and the second connecting member 1312 may also be a connecting rod, and the locking member 133 may be a member that can be engaged with the connecting rod, so as to lock the first connecting member 1311 and the second connecting member 1312. The adjustment piece 1322 is a part that can be snapped onto the connecting rod to achieve adjustment of the compression of the elastic member 1321.
Referring to fig. 1-3, in one embodiment, the number of the adjustment connecting structures 130 is multiple, and a plurality of the adjustment connecting structures 130 are spaced along the outer circumference of the proximal bracket 110 and the distal bracket 120. The proximal bracket 110 and the distal bracket 120 are connected by the plurality of adjusting and connecting structures 130, so that the connection between the proximal bracket 110 and the distal bracket 120 can be ensured to be reliable, and the accurate bone restoration can be further ensured. Optionally, the plurality of adjusting connection structures 130 are uniformly distributed, so that the stress between the proximal bracket 110 and the distal bracket 120 can be uniformly ensured, and inaccurate bone reduction can be avoided. Illustratively, the number of the adjustment connection structures 130 is four, and four adjustment connection structures 130 are evenly distributed along the circumferential direction.
Referring to fig. 1 to 3, in an embodiment, the proximal bracket 110 includes a first left bracket 111 and a first right bracket 112, the first left bracket 111 and the first right bracket 112 are assembled together to form a complete bracket, and a joint of the first left bracket 111 and the first right bracket 112 is used for clamping and installing a half needle that can be fixed to the proximal bone. That is, the proximal frame 110 is divided into two left and right halves, namely a first left frame 111 and a first right frame 112. When the bone fracture plate is used, the first left support 111 and the first right support 112 are respectively placed on two sides of a near-end bone, then the first left support 111 and the first right support 112 are installed in an involution mode to form a complete support, then the first left support 111 and the first right support 112 are fixedly connected through screws, and the near-end support 110 is guaranteed to be reliably connected.
Generally, the steel needle 200 fixed to the bone includes a half needle and a long needle. In order to avoid the position of the half needle on the proximal bracket 110 from shifting, the half needle is clamped through the joint of the first left bracket 111 and the first right bracket 112, so that the half needle can be reliably fixed in the proximal bone, and the fixing effect is ensured. When the long needle is used, the first left bracket 111 and the first right bracket 112 are provided with connecting holes opposite to each other, and the long needle passes through the connecting hole of the first left bracket 111, then passes through the proximal bone, and then is installed in the corresponding connecting hole of the first right bracket 112.
In one embodiment, the distal frame 120 includes a second left frame 121 and a second right frame 122, the second left frame 121 and the second right frame 122 are assembled together to form a complete frame, and the joint of the second left frame 121 and the second right frame 122 is used for clamping and installing a half needle that can be fixed to the distal bone. That is, the distal stent 120 is divided into two left and right lobes, namely a second left stent 121 and a second right stent 122, by cutting from the middle. When the bone fracture plate is used, the second left support 121 and the second right support 122 are respectively placed on two sides of a far-end bone, then the second left support 121 and the second right support 122 are installed in an involution mode to form a complete support, then the second left support 121 and the second right support 122 are fixedly connected through screws, and the far-end support 120 is guaranteed to be reliably connected.
In order to avoid the position of the half needle on the distal bracket 120 from shifting, the half needle is clamped through the joint of the second left bracket 121 and the second right bracket 122, so that the half needle can be reliably fixed in the distal bone, and the fixing effect is ensured. When the long needle is used, the second left bracket 121 and the second right bracket 122 are provided with connecting holes opposite to each other, and the long needle passes through the connecting hole of the second left bracket 121, then passes through the distal end bone, and then is installed in the corresponding connecting hole of the second right bracket 122.
In one embodiment, the proximal stent 110 and the distal stent 120 are formed by 3D printing, machining, or the like. Moreover, the frame structure of the proximal bracket 110 and the distal bracket 120 is matched with the body shape of the fixed part of the patient, so that the occupied space is minimized, and the influence on the activity of the patient is reduced.
Before the skeleton is reset, the CT scanning imaging is carried out on the skeleton at the fracture position of the patient, then a 3D model is reconstructed on the skeleton of the patient through a scanning imaging structure, and the 3D model is consistent with the skeleton of the patient before fracture. Then, the external skeletal fixation device 100 for accurately fixing the steel needle 200 is designed according to the position of the steel needle 200 and the body surface contour required by the patient reduction. The proximal support 110 and the distal support 120 are formed by 3D printing or machining, so that the proximal support 110 can be matched with the body shape of a patient, and the fractured bone can be reduced more accurately according to the requirements of medical staff.
After the proximal support 110 and the distal support 120 are molded, the skeleton is restored through the proximal support 110 and the distal support 120, the position after restoration is confirmed by medical staff, the position of the steel needle 200 which is hit on the skeleton is confirmed at the moment, the relative position of the steel needle 200 is fixed as long as the steel needle 200 is fixed through the skeleton external fixing device 100, and the position of the steel needle 200 is consistent with the position of the 3D model restoration, so that the accurate bone restoration of a patient can be ensured.
Specifically, when the external skeletal fixation device is installed, the proximal end support 110 and the steel needle 200 are fixedly installed, the distal end support 120 and the steel needle 200 are fixedly installed, and then the distal end support is fixedly connected through the adjusting connection structure 130, so that the distal end skeleton at the fracture position can be gradually reset to an accurate position.
Referring to fig. 1, 2 and 7, in one embodiment, the bone external fixation device 100 further includes a position detector 140, the position detector 140 is disposed on the proximal bracket 110 and/or the distal bracket 120 and located between the proximal bracket 110 and the distal bracket 120, and the position detector 140 is configured to monitor a change in the relative position of the proximal bracket 110 and the distal bracket 120. Alternatively, the position detecting element 140 includes, but is not limited to, a position sensor, and may be other elements that can perform position detection. Position detector 140 may monitor changes in the relative position between proximal stent 110 and distal stent 120. In one aspect, after monitoring the relative position change, it is possible to monitor whether there is a loosening between proximal frame 110 and distal frame 120, since loosening is a phenomenon that often occurs with external bone fixation devices 100 and is detrimental to bone growth of the patient. On the other hand, monitoring the relative position change can detect the compression condition of the bone after the rigidity of the bone external fixation device 100 is reduced, can prevent the bone from being over stressed, and can also analyze and record the daily stress stimulation condition of the bone for the data analysis of the bone stress stimulation growth.
Optionally, the number of the position detecting members 140 is multiple, and the position detecting members 140 are symmetrically arranged, so that the accuracy of position monitoring is ensured. Illustratively, the number of the position detecting members 140 is two, wherein one position detecting member 140 is disposed on the second left bracket 121, and the other position detecting member 140 is disposed on the second right bracket 122, as shown in fig. 7.
In one embodiment, the external bone fixation device further comprises an information transmission member electrically connected to the position detection member 140 for transmitting information of the relative position change to an external device. Alternatively, the external device may be a computer or a handheld device such as a mobile phone, a tablet, etc. The information transmission piece is in communication connection with external equipment. When there is no relative position change between the proximal bracket 110 and the distal bracket 120, the position detecting member 140 does not operate, and accordingly, the information transmitting member transmits information to an external device. When there is a relative position change between the proximal end and the distal end of the frame 120, the information of the relative position change detected by the position detector 140 can be transmitted to an external device to remind the patient to fasten the external bone fixation device 100.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An external bone fixation device comprising:
the near-end support can be sleeved on a near-end skeleton at a skeleton fracture part and comprises a first left support and a first right support, and the first left support and the first right support are installed in a folding mode;
the far-end support can be sleeved on a far-end skeleton at the bone fracture position and comprises a second left support and a second right support, and the second left support and the second right support are installed in a folding mode; and
and the adjusting and connecting structure is connected with the near-end bracket and the far-end bracket and is used for adjusting the rigidity between the near-end bracket and the far-end bracket.
2. The external skeletal fixation device of claim 1, wherein the adjustment connection structure further comprises a connection assembly connecting the proximal bracket and the distal bracket, and a rigidity adjustment assembly sleeved outside the connection assembly, wherein the connection assembly is configured to adjust the relative movement between the proximal bracket and the distal bracket, and the rigidity adjustment assembly is configured to adjust the rigidity between the proximal bracket and the distal bracket.
3. The external bone fixation device of claim 2, wherein the connection assembly includes a first connector disposed on the proximal bracket and a second connector disposed on the distal bracket, the first connector being telescopically coupled to the second connector.
4. The external bone fixation device of claim 3, wherein the rigidity adjustment assembly comprises an elastic member and an adjustment member, the elastic member is sleeved on the first connecting member and the second connecting member, and the adjustment member is movably sleeved on the first connecting member or the second connecting member and abuts against one end of the elastic member;
when the adjusting part compresses one end of the elastic part, the elastic force of the other end of the elastic part can enable the near-end support or the far-end support to move towards the direction away from each other, so that the near-end support and the far-end support are flexibly connected.
5. The external bone fixation device of claim 4, wherein said adjustment connection structure further comprises a locking member disposed at said first and/or second connector for locking said first and/or second connector to maintain a spacing between said proximal and distal brackets;
when the locking piece is unlocked, the rigidity between the near-end bracket and the far-end bracket can be adjusted.
6. The external bone fixation device of claim 5, wherein said first connector is a first threaded member movably mounted to said proximal bracket, said second connector is a second threaded member having a through hole, said second threaded member is threadedly coupled to said distal bracket, and said first threaded member extends through said second threaded member, and said locking member is mounted to an extended end of said first threaded member and abuts said second threaded member;
the adjusting piece and the elastic piece are located between the near-end support and the far-end support, the adjusting piece is rotatably installed on the second threaded piece, and the elastic piece is sleeved on the second threaded piece and respectively abutted against the adjusting piece and the near-end support.
7. The external bone fixation device of any one of claims 1 to 6, wherein said adjustment connection structure is provided in a plurality of numbers, and a plurality of said adjustment connection structures are spaced along the outer periphery of said proximal bracket and said distal bracket.
8. The extraskeletal fixation device of any of claims 1 to 6, wherein the junction of the first left brace and the first right brace is configured to clamp a half-needle securable to the proximal bone; the second left support and the second right support are installed in a folding mode to form a complete support, and a joint of the second left support and the second right support is used for clamping and installing a half needle capable of being fixed to the far-end skeleton.
9. The external bone fixation device of any one of claims 1 to 6, further comprising a position detector disposed between said proximal bracket and said distal bracket, said position detector being configured to monitor a change in the relative position of said proximal bracket and said distal bracket.
10. The external bone fixation device of claim 9, further comprising an information transmission member, said information transmission member being communicatively coupled to said position detection member for transmitting said information of said relative change in position to an external device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922057518.XU CN211534739U (en) | 2019-11-25 | 2019-11-25 | External bone fixing device |
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| CN201922057518.XU CN211534739U (en) | 2019-11-25 | 2019-11-25 | External bone fixing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113499131A (en) * | 2021-05-17 | 2021-10-15 | 无锡市第九人民医院 | Be applied to osteotomy lockplate of child's skeleton deformity |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113499131A (en) * | 2021-05-17 | 2021-10-15 | 无锡市第九人民医院 | Be applied to osteotomy lockplate of child's skeleton deformity |
| CN113499131B (en) * | 2021-05-17 | 2022-05-20 | 无锡市第九人民医院 | Be applied to osteotomy lockplate of child's skeleton deformity |
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