CN217987683U - Marrow cavity support system - Google Patents
Marrow cavity support system Download PDFInfo
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- CN217987683U CN217987683U CN202121233750.5U CN202121233750U CN217987683U CN 217987683 U CN217987683 U CN 217987683U CN 202121233750 U CN202121233750 U CN 202121233750U CN 217987683 U CN217987683 U CN 217987683U
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Abstract
The utility model belongs to the technical field of orthopedics apparatus, a marrow inner chamber braced system is specifically disclosed, including widening propping mechanism and interior tectorial membrane. The wide supporting wall of the wide supporting mechanism is of an elastic structure, and the interior of the wide supporting mechanism is a variable inner cavity; the inner coating is arranged on the inner wall of the variable inner cavity; the inner covering film is provided with bone cement or bone grafting material. The use method of the marrow inner cavity support system comprises the steps of implanting the system through a minimally invasive bone hole, expanding the system to form a support after reaching a designated marrow cavity position, and fixing broken bones to the system. The support of the utility model can be implanted into the human body through a smaller wound, and can also keep a better fit with the marrow cavity; so that some broken bones are more convenient to fix and a fixed supporting part is provided.
Description
Technical Field
The utility model belongs to the technical field of orthopedics apparatus, especially, relate to marrow inner chamber braced system.
Background
Intramedullary nail internal fixation is an operation in which an intramedullary nail with a suitable size and length is placed in bone marrow cavities on both sides of a fracture end, so that a fractured body part can be fixed.
A femoral intramedullary fixation device is disclosed in patent document No. CN208610972U (hereinafter referred to as reference 1). The comparison document 1 comprises an intramedullary main nail arranged in a femoral shaft, a compression screw structure which penetrates through the second through hole and is fixed, a cortical bone screw which penetrates through the third through hole and is fixed, and a supporting locking nail which penetrates through the first through hole and is fixed, wherein the head part of the far end of the supporting locking nail is propped against a clamping groove of the transverse sheath, so that the near end of the intramedullary main nail, the transverse sheath and the supporting locking nail form a triangular mechanical stable structure.
However, in the case of the intramedullary fixation device disclosed in reference 1, when intramedullary fixation is performed, the intramedullary nail is locked from the outside, and thus, in the case of a fracture in which the articular surface is collapsed, it is impossible to support and reduce the intramedullary nail from the inside.
In the prior art, a locking screw for intramedullary nail internal fixation generally realizes locking in a rotating direction perpendicular to the axis of an intramedullary nail, namely, the requirement of multi-direction and multi-dimensional bone joint multi-end surface fixation cannot be realized. The unidirectional intramedullary nail fixing effect depends on whether the bone strength of a patient is good or not, and the problem of internal fixation failure of the intramedullary nail after operation exists for old patients with loose bone with reduced bone strength.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a marrow inner chamber braced system has mainly solved the unable fixed problem of bone fracture broken bone stabilization of solving of current fixing device, lacks the fixed stay scheduling problem.
In order to solve the problem, the utility model adopts the following technical scheme:
the intramedullary cavity supporting system comprises
The wide supporting mechanism comprises a wide supporting wall made of elastic materials, and a variable inner cavity is formed inside the wide supporting wall.
In some forms, the variable lumen further comprises an inner covering membrane disposed inside the spreader wall and covering the variable lumen.
In some forms, the spreader wall has a plurality of hollowed-out portions.
In some modes, the following steps: the wide supporting wall is provided with a plurality of deformation parts.
In some modes, the wide supporting wall is formed by interweaving a plurality of deformation strips, and the deformation strips of the deformation part are bent inwards;
after interweaving, a hollow part is formed between the adjacent deformation strips.
In some modes, under the action of external force, the broad propping wall can contract inwards, and the broad propping wall has the tendency of restoring the original shape; the wide supporting mechanism further comprises a wide supporting end part and a wide supporting tail part which are respectively arranged at the two ends of the wide supporting wall.
In some embodiments, the broad supporting wall is a memory metal plate, and the memory metal plate is provided with a plurality of hollow parts.
In some forms, the deformation is inwardly concave.
In some forms, the inner cover film includes an inner cover film port portion, the inner cover film port portion being located in the broad stay end portion; the inner covering film is provided with a feed inlet and is used for conveying bone cement or bone grafting materials.
The beneficial effects of the utility model are that:
1. the support can be implanted into a human body through a smaller wound, and meanwhile, the support can keep a better fit with a bone marrow cavity;
2. so that some broken bones are more convenient to fix and a fixed supporting part is provided.
Drawings
FIG. 1 is a part view of the present invention;
FIG. 2 is a schematic view of an assembly state of the present invention;
FIG. 3 is a schematic view of another perspective structure of the present invention;
fig. 4 is a schematic view of the installation state of the present invention, (a) for distal radius installation, (B) for taper bone installation, and (C) for proximal humerus installation;
FIG. 5 is a schematic structural view of the support wall of the present invention;
FIG. 6 is a schematic view of another structure of the wide supporting wall of the present invention;
FIG. 7 is a schematic view of the wide supporting wall of the present invention in an annular rolled state;
fig. 8 is a schematic diagram of the structure after deformation.
In the figure:
100 marrow cavity supporting system, 200 wide supporting mechanism, 300 internal coating, 20 wide supporting wall, 21 wide supporting end, 22 wide supporting tail, 23 hollow part, 24 memory elastic strip, 25 deformation part, 30 internal coating body and 31 internal coating port.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1, a supporting system 100 for an intramedullary cavity is disclosed in the present embodiment.
The intramedullary cavity support system 100 includes at least a distraction mechanism 200 when performing intramedullary nail internal fixation.
The spreader mechanism 200 includes a spreader wall 20. The broad stay wall 20 is of an elastic structure, and a variable inner cavity is formed inside the broad stay wall 20.
The structural feature of the broad propping wall 20 in this embodiment is that it is manufactured into a specific structural shape as required, and the specific structural shape is adjusted according to the structural shape of the cavity, i.e. the supporting region in some embodiments, which is generated by different human body parts and diseases and can accommodate the fixing system.
The spreader wall 20 can be arbitrarily and locally contracted inward when an inward external force is applied, so that the outer diameter of the cross section of the spreader wall 20 is reduced, and any part of the spreader wall 2 can pass through a passage with a smaller diameter range.
Meanwhile, when external force is applied to enable the broad support wall 20 to be contracted inwards, the broad support wall 20 is kept in a contracted state, and a recovery trend of recovering deformation is generated; then, after the applied external force is released, the supporting broad wall 20 can be restored from the contracted state to the natural state of the supporting broad wall 20 before deformation or to the pressed state in which the supporting broad wall 20 is in contact with a part of the human bone or tissue according to the restoring tendency.
Referring to fig. 2 and 3, in the present embodiment, an inner coating 300 is disposed on the inner side of the broad-width supporting wall 20, and the inner coating 300 is attached to the inner wall of the broad-width supporting wall 20, so that the inner coating 300 can cover the variable inner cavity. The inner cover 300 of this embodiment prevents the bone cement or other bone graft material that can be contained in the variable lumen from escaping outward.
Fig. 5 shows that the wide supporting wall 20 of the present embodiment is formed by interweaving memory-deformable metal wires, and is formed into a flat-laid net-shaped woven structure.
Fig. 6 shows that the wide supporting wall 20 in the embodiment is formed by interweaving metal wires into a woven structure with larger meshes than those in fig. 5, and the inner diameters of the meshes at the two ends are different, so that the deformation quantity at the two ends of the wide supporting wall 20 in fig. 6 is different, and the meshes at the upper part in fig. 6 are larger, so that the wide supporting wall has larger deformation quantity and larger adjustment space.
The woven structure after being wound forms the roll structure of fig. 7. When the spool structure is formed into a specific shape having a large front end cross-sectional diameter and a small rear end cross-sectional diameter as shown in fig. 1, the front and rear ends of the spool structure need to be bundled.
Thus, in some embodiments, the spreader mechanism 200 further includes a spreader end portion 21 and a spreader tail portion 22 disposed at opposite ends of the spreader wall 20. The spreader 20 is made of a deformable material and requires connecting portions at both ends so that only the middle portion can expand after both ends are restricted from expanding.
The wide wall 20 that props has a plurality of fretwork portion 23, fretwork portion 23 distributes on wide wall 20 that props, has improved wide wall 20 that props and has received the deformation range after the external force, for not having the lateral wall that the wide wall 20 that props, be equipped with behind a plurality of fretwork portions 23, at the extrusion in-process, the through-hole of fretwork portion 23 also can take place deformation thereupon, generally speaking, like structure in fig. 2, under the great prerequisite of fretwork portion 23, its own has bigger deformation range, for example the deformation allowance at its middle part is greater than the deformation allowance at both ends.
As shown in fig. 6, the broad brace wall 20 is formed by interweaving a plurality of deformation strips 24, and the deformation strips 24 of the deformation part 25 are bent inwards; the deformation strips 24 are transversely and longitudinally woven, or as shown in the figure, in the view angle of figure 6, the longitudinal deformation strips 24 are arranged, the deformation strips 24 are arranged in a bending way, and the bending parts of the two adjacent deformation strips 24 are connected with each other, so that a hollow part 23 is formed between the two connecting parts;
or after the transverse and longitudinal interweaving, hollow parts 23 are formed among a plurality of adjacent deformation strips 24;
the arrangement mode close to the fabric also enables the wide supporting wall 20 to have larger deformation allowance, the local hollow-out part 23 can be expanded under the action of external force, certain extension occurs, and the wide supporting wall 20 can be contracted.
In another case, as shown in fig. 5, the supporting wall 20 is a memory metal plate, which has a memory deformation function, and in order to improve its irregular deformation capability, the memory metal plate is provided with a plurality of hollow portions 23, for example, when it is manufactured into the product in fig. 8, more hollow portions 23 are provided to improve the local deformation capability of the supporting wall 20, and when it is manufactured into an irregular shape, it can still contract inwards, and reduce the outer diameter, so as to be conveniently placed into the bone.
Wherein, the materials of the elastic metal and the inner coating film are shown in the following table,
in some embodiments, the broken bone is fixed on the intramedullary cavity support system by fixing nails, and after the nail insertion point is determined, an intramedullary nail with a suitable size and length is inserted into the intramedullary cavity at both sides of the fractured end, and the nails can penetrate through the hollow part 23 and are driven into bone cement or bone grafting materials to play a role in fixing and supporting.
As in fig. 4, when used in the distal radius, proximal humerus, three-dimensional internal fixation, accounting for bone joint end face collapse; then, the fixation is performed through the multi-axial fixation of the screw, so that the fixation requirement of fracture around the joint is met; fixed on the implant, has low requirement on bone strength, and is suitable for osteoporosis patients; acting on the fracture of three or four parts of the proximal humerus to replace joint replacement.
In other embodiments, fixation may be performed without screws, as in fig. 4, for use in vertebroplasty, where support of the internal body is achieved by implanting a three-position internal fixation system, which serves as a support in the vertebroplasty.
In one embodiment, as shown in FIG. 8, the spreader broad 20 has a plurality of deformations 25. The deformation portion 25 is generally convex-concave, and the shape and size of the deformation portion 25 are adjusted to adjust the overall shape.
The deformation part 25 is inwards concave, and the edge of the deformation part 25 is relatively formed into a convex shape only by controlling the deformation part to be inwards concave; the deformation in fig. 8 is for convenience of description and is not limited to the concave type, and the specific concave position, shape, area and depth are all adjusted according to actual needs, but these are all one of the deformation parts 25.
As shown in connection with fig. 2, the inner film 300 includes an inner film port portion 31, the inner film port portion 31 being located in the broadbrace end portion 21; the inner coating 300 is provided with a feed port for conveying bone cement or bone grafting materials. The inner coating 300 forms a container for containing bone cement or bone graft material, but the inner coating 300 itself is not easily shaped and needs to be used in cooperation with the broad propping wall 20. The form of the inner coating 300 is changed with the form of the broad supporting wall 20.
The inner cover film 300 includes an inner cover film body 30 and an inner cover film port portion 31.
In other embodiments, the spreader 20 may be expanded by mechanical expansion structures, or other means to achieve the same effect, and then subsequently operated.
Also, the internal fixation system may be used in the repair of a total body fracture or any other area requiring support, or other areas, not limited to a particular environment of use, nor to the extent limited by the name "intramedullary canal". Such as illustrated in fig. 4 for proximal humerus and distal radius repair fixation, provide internal support during vertebroplasty procedures, and in addition, the present internal fixation system can also provide internal support for femoral head necrosis.
Referring to fig. 4, after the wide strut wall 20 is restored to the shape, the bone cement or bone graft material enters the inner film 300 through the inlet, and then the bone cement or bone graft material is coagulated, so that the bone cement or bone graft material has the same shape as the wide strut wall 20, and the inner wall of the variable inner cavity is supported by the bone cement or bone graft material. So that the broad propping walls 20 play a supporting role in the medullary cavity, and at the same time, the broad propping walls 20 provide a supporting installation fixing part for the installation of the crushed bone.
The setting generally means setting in the case of bone cement, and the setting means joining and aggregating of the crushed bones when the bone grafting material is the crushed bones, and the crushed bones form a relatively firm whole.
Referring to fig. 4, the method of using the intramedullary canal support system will be further described,
the shape of the outer wall of the broad-support wall 20 is integrally set, the positions of the deformation parts 25 on the broad-support wall 20 are adjusted, and the shapes and the sizes of the deformation parts 25 are adjusted; the change of the structure of the broad propping wall 20 in a large area or a small area can be realized by controlling the size of the deformation part 25.
The shape of the broad propping wall 20 is adjusted as required to match the shape of the inner cavity of the marrow cavity, and the matching means that the outer wall of the broad propping wall 20 can be attached to the inner wall of the cavity at the position to be implanted.
In one mode, when the implantation is performed, a bone hole is drilled;
the marrow cavity supporting system is conveyed into the marrow cavity through the conveyor, after the broad strut wall 20 enters the bone, the extrusion force on the broad strut wall 20 is removed, then the broad strut wall 20 is expanded outwards to restore to the shape without external force extrusion, and the broad strut wall 20 is matched with the shape of the marrow cavity.
The bone cement or bone grafting material is fed into the inner covering film 300 through the feeding hole, after the bone cement or bone grafting material is filled, the screw is screwed down to seal the feeding hole, and after the bone cement or bone grafting material is condensed, the bone cement or bone grafting material is solidified.
It will be apparent to those skilled in the art that various modifications to the above embodiment may be made without departing from the general spirit and concept of the invention. Which all fall within the protection scope of the utility model. The protection scheme of the utility model is based on the appended claims.
Claims (8)
1. A intramedullary cavity support system, comprising: comprises that
The broad bracing mechanism (200), the broad bracing mechanism (200) comprises a broad bracing wall (20) made of elastic material, a variable inner cavity is formed inside the broad bracing wall (20),
under the action of external force, the wide support wall (20) can contract inwards, and the wide support wall (20) has the tendency of recovering the original shape; the wide supporting mechanism (200) also comprises a wide supporting end part (21) and a wide supporting tail part (22) which are respectively arranged at the two ends of the wide supporting wall (20).
2. The intramedullary cavity support system of claim 1, wherein: the inner covering film (300) is arranged on the inner side of the broad support wall (20) and covers the variable inner cavity.
3. The intramedullary cavity support system of claim 2, wherein: the wide supporting wall (20) is provided with a plurality of hollow parts (23).
4. The intramedullary cavity support system of claim 3, wherein: the broad bracing wall (20) is provided with a plurality of deformation parts (25).
5. The intramedullary cavity support system of claim 4, wherein: the broad bracing wall (20) is formed by interweaving a plurality of deformation strips (24), and the deformation strips (24) of the deformation part (25) are bent inwards;
after interweaving, hollow parts (23) are formed among a plurality of adjacent deformation strips (24).
6. The intramedullary cavity support system of claim 5, wherein: the broad bracing wall (20) is a memory metal plate, and the memory metal plate is provided with a plurality of hollow parts (23).
7. The intramedullary cavity support system of claim 5, wherein: the deformation portion (25) is recessed inward.
8. The intramedullary cavity support system of claim 2, wherein: the inner coating (300) comprises an inner coating port portion (31), the inner coating port portion (31) being located in the stretch-widening end portion (21); the inner covering film (300) is provided with a feed inlet for conveying bone cement or bone grafting materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121233750.5U CN217987683U (en) | 2021-06-03 | 2021-06-03 | Marrow cavity support system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121233750.5U CN217987683U (en) | 2021-06-03 | 2021-06-03 | Marrow cavity support system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217987683U true CN217987683U (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121233750.5U Active CN217987683U (en) | 2021-06-03 | 2021-06-03 | Marrow cavity support system |
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| CN (1) | CN217987683U (en) |
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- 2021-06-03 CN CN202121233750.5U patent/CN217987683U/en active Active
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