CN216797797U

CN216797797U - Guyed tension trabecular bone reconstruction type proximal femoral intramedullary nail

Info

Publication number: CN216797797U
Application number: CN202122977294.1U
Authority: CN
Inventors: 王欣; 程黎明; 袁锋; 杨云峰
Original assignee: Shanghai Tongji Hospital
Current assignee: Shanghai Tongji Hospital
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-06-24
Anticipated expiration: 2031-11-30

Abstract

The utility model relates to a guyed tension trabecular bone reconstruction proximal femoral intramedullary nail, which comprises an anchoring part, a guyed cable and a fixing part, wherein the anchoring part is fixedly connected with the guyed cable; the outer surface of the anchoring part is provided with a main thread and an auxiliary thread, the center of the bottom of the anchoring part is connected with a traction cable, the other end of the traction cable is connected with the center of one end of the fixing part, the end surface of the anchoring part is provided with a first connecting part, the fixing part is provided with a second connecting part, the first connecting part and the second connecting part are detachably connected, so that the anchoring part and the fixing part can work cooperatively without hindering the separation of the anchoring part and the fixing part, the anchoring part and the fixing part are fixed in a skeleton and are locked by a traction cable, the device can be implanted in any direction according to the operation requirement, can implant a plurality of groups and work independently to reconstruct the tension trabecula after fracture, and the bone plate and the compressive trabecula take effect together, so that the stability of fracture repair is improved, and the phenomenon that the bone plate is displaced again after functional activities to influence fracture healing and recovery is effectively prevented.

Description

Guyed tension trabecular bone reconstruction type proximal femoral intramedullary nail

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a guyed tension trabecular reconstruction type proximal femoral intramedullary nail.

Background

Trabecular bone is the main supporting structure of proximal femur, and can be divided into pressure trabecular bone and tension trabecular bone according to the distribution, and is the extension of proximal femur cortical bone in cancellous bone. Therefore, the internal fixation system has an important effect on the fixation of the fracture, the internal fixation system clinically used at present is mostly in a support reconstruction type, namely, the reconstruction of the pressure trabecula, but for unstable fracture, the reconstruction of the pressure trabecula is only carried out, the stable structure of the fracture cannot be completely recovered, and the re-displacement occurs after the functional activity, so that the fracture healing and recovery are influenced.

Chinese patent application CN112656500A discloses an improved tension trabecular bone reconstruction proximal intramedullary nail, which comprises a main nail body, a reconstruction device and a locking device; a reconstruction device through hole is transversely formed in the near section of the main nail body; the reconstruction device comprises an anchor and a titanium cable; the titanium cable is fixedly connected with the tail end of the anchor; the locking device comprises a locking head and a connecting part; the two ends of the locking head are in a conical opening structure; the surface of the front end of the connecting part is provided with an external thread structure, and the tail end of the connecting part is of a hollow inner hexagonal structure; and a conical hole structure matched with the tail end of the locking head is also arranged in the center of the connecting part. Its advantages are: rebuilding the femoral neck tension trabecula to play the role of elastic fixation; meanwhile, the anti-rotation and anti-inversion stress of the femoral head and neck bone block can be enhanced, and good stability can be achieved; and the direction of the anchoring nail driven can be freely adjusted according to different femoral neck diameters of patients. However, the intramedullary nail has a great disadvantage that the intramedullary nail needs to be fixed by means of a main nail, the freedom of nail feeding direction and position cannot be realized, the intramedullary nail can not be used independently, and a plurality of groups of multidirectional arrangement cannot be realized.

In summary, there is a need for a reconstruction structure capable of increasing the tension trabecula, which has better stability, reduces the occurrence of hip varus, reduces the stress borne by the support trabecula, and has anti-rotation effect.

Disclosure of Invention

The utility model aims to provide a guyed tension trabecular bone reconstruction type proximal femoral intramedullary nail which can increase the reconstruction structure of the tension trabecula, has better stability, reduces the occurrence of hip varus, reduces the stress born by the support trabecula and has the anti-rotation function.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a guyed tension trabecular bone reconstruction type proximal femoral intramedullary nail comprises an anchoring part, a guyed cable and a fixing part; one end of the traction cable is connected with the anchoring part, and the other end of the traction cable is connected with the fixing part.

As a preferred technical scheme, its terminal surface of anchor portion is equipped with first connecting portion, and is corresponding, its one end of fixed part is equipped with the second connecting portion of looks adaptation, first connecting portion with the second connecting portion can be dismantled continuously.

As a preferred technical scheme, the fixing part is internally provided with a cavity structure, and the traction cable is movably fixed inside the cavity structure.

As a preferred technical solution, the first connecting portion is a groove with a central symmetry, the second connecting portion is a protrusion adapted to the groove, and the length of the groove is longer than the length of the protrusion.

As a preferable technical scheme, the device further comprises a feeder, wherein a rotating rod is arranged on the feeder, correspondingly, a groove-shaped structure matched with the rotating rod is arranged on the end face of the anchoring part, and a through hole matched with the rotating rod is arranged on the fixing part.

As a preferable technical scheme, one end of the traction cable is detachably connected with the anchoring part.

As a preferred technical scheme, the traction cable is detachably connected with the fixed part.

As a preferred technical scheme, still include and adjust the protective sheath, adjust the protective sheath with the fixed part can be dismantled and be connected.

As a preferred technical scheme, the fixing device further comprises a main nail, wherein a fixing hole is formed in the main nail, and the fixing hole is used for fixing the fixing part.

The utility model has the advantages that:

1. the utility model relates to a guyed tension trabecular bone reconstruction type proximal femoral intramedullary nail, which comprises an anchoring part, a guyed cable and a fixing part; traction cable one end with anchor portion links to each other, the other end with the fixed part links to each other, anchor portion with in the fixed part is fixed in the skeleton, through between the two the traction cable locks, the device can select arbitrary position to implant according to the operation needs, can the multiunit implant, and independent work rebuilds the tension trabecula bone after the fracture to play a role together with pressure trabecula bone, improve fracture repair's stability jointly, effectively prevent to appear shifting again after the function activity, influence fracture healing and recovery.

2. According to the utility model, the end face of the anchoring part is provided with the first connecting part, one end of the fixing part is provided with the second connecting part matched with the first connecting part, the first connecting part and the second connecting part are detachably connected, the first connecting part is a groove which is centrosymmetric, the second connecting part is a bulge matched with the groove, the length of the groove is longer than that of the bulge, and the integrated implantation of an operation is facilitated.

3. The fixing part is internally provided with a cavity structure, the traction cable is movably fixed in the cavity structure of the fixing part, namely the traction cable can be gathered in the cavity, the anchoring part is convenient to be matched with the fixing part, and then the anchoring part is convenient to implant, and the traction cable is movably fixed in the cavity, so that the traction cable can keep enough tension, and a certain buffer area is provided for the activity space of the traction cable.

4. The guyed tension trabecular bone reconstruction type proximal femoral intramedullary nail comprises an adjusting protective sleeve, wherein the adjusting protective sleeve is detachably connected with a fixing part; adjust the protective sheath with accessible threaded connection between the fixed part, implant the back, conveniently adjust the tension size that leads the cable, if need when taut relatively, adjust the fixed part in adjust the protective sheath relative position can, when preventing its direct contact sclerotin, unnecessary damage is caused in too much adjustment, and it is big to adjust protective sheath area of contact, makes the stiff end more stable, and the cable stability is higher.

5. The guyed tension trabecular bone reconstruction proximal femoral intramedullary nail further comprises a main nail, wherein a fixing hole is formed in the main nail, the fixing hole is detachably connected with the fixing part, and the working effect of a guyed cable is further guaranteed by means of the stability of the main nail.

Drawings

FIG. 1 is a schematic view of a guyed tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention.

Fig. 2 is a cross-sectional view of the fixing part of the guyed tension trabecular reconstruction type proximal femoral intramedullary nail of the utility model.

Fig. 3 is a schematic view of the anchoring part of the guyed tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention.

Fig. 4 is a schematic view of the fixing part of the guyed tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention.

FIG. 5 is a schematic diagram of the combination of a stay-cable type tension trabecular reconstruction proximal femoral intramedullary nail and a bone according to the present invention.

Fig. 6 is a schematic view of another guyed tension trabecular reconstruction type proximal intramedullary nail of femur of the present invention.

FIG. 7 is a schematic view of another pull-cord type tension trabecular bone remodeling proximal femoral intramedullary nail and feeder of the present invention.

FIG. 8 is a schematic view of a detachable traction cable of a tension trabecular bone reconstruction type proximal femoral nail of the present invention.

FIG. 9 is a schematic view of the combination of a stay-cable type tension trabecular reconstruction type proximal femoral intramedullary nail and an adjusting protective sleeve of the present invention.

Figure 10 is a schematic view of another adjustment sleeve of the present invention.

FIG. 11 is a schematic view of the combination of a stay-cable type tension trabecular reconstruction type proximal femoral intramedullary nail and a main nail according to the present invention.

FIG. 12 is a schematic view of another fastening portion of the present invention.

Detailed Description

The utility model will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by those skilled in the art after reading the disclosure of the present invention, and equivalents fall within the scope of the appended claims.

The reference numerals and components referred to in the drawings are as follows:

1. anchoring part 2, traction cable 3, fixing part

4. Feeder 5, adjusting protective sleeve 6 and main nail

11. Main thread 12, auxiliary thread 13, first connection

14. Groove-shaped structure 31, control groove 32 and second connecting part

33. Through hole 34, plugging cap 35, fixed wing

41. Rotating rod 61, fixing hole 21 and stop block

15. Connecting ring

Example 1

Referring to fig. 1, fig. 1 is a schematic view of a guyed tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention. A guyed tension trabecular bone reconstruction proximal femoral intramedullary nail comprises an anchoring part 1, a guyed 2 and a fixing part 3; the anchoring portion 1 is a conical thread structure, preferably, the outer surface of the anchoring portion is provided with a main thread 11 and an auxiliary thread 12, the main thread 11 and the auxiliary thread 12 are arranged at intervals, the size of the main thread 11 is larger than that of the auxiliary thread 12, the center of the bottom of the conical surface of the anchoring portion 1 is connected with a traction cable 2, the traction cable 2 can be a titanium rope, a steel wire for operation and the like, the other end of the traction cable 2 is connected with the center of one end of the fixing portion 3, in the embodiment, the fixing portion 3 is cylindrical, the outer portion of the fixing portion is also provided with threads (not shown in the figure), the main thread 11 and the auxiliary thread 12 can be matched, the stability between the main thread and the bone can be improved, and one end of the fixing portion 3 is provided with a control groove 31, so that an instrument can be conveniently used for rotation control of the fixing portion.

Referring to fig. 2, fig. 2 is a cross-sectional view of the fixing portion of a stay-cable type tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention. In this embodiment, the fixing portion 3 is a cylindrical cavity, one end of the pulling cable 2 connected to the fixing portion 3 is located in the cylindrical cavity, and passes through a bottom cavity wall of the cylindrical cavity, and a stop block 21 may be disposed at an end of the pulling cable 2 connected to the fixing portion to prevent the pulling cable 2 from being separated from the fixing portion 3, and the pulling cable 2 between the anchoring portion 1 and the fixing portion 3 may be gathered in the cavity of the fixing portion 3, so that the anchoring portion 1 and the fixing portion 3 may be attached to each other, for reference, fig. 3 and fig. 4 correspondingly; FIG. 3 is a schematic view of the anchoring portion of a guyed tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention; FIG. 4 is a schematic view of the fixing portion of a stay cable type tension trabecular bone reconstruction type proximal femoral intramedullary nail of the present invention; the end face of the anchoring portion 1 is provided with a first connecting portion 13, one end of the fixing portion 3 is provided with a second connecting portion 32 matched with the first connecting portion 13, the first connecting portion 13 and the second connecting portion 32 are detachably connected, preferably, the first connecting portion 13 is a groove which is centrosymmetric, the second connecting portion 32 is a protrusion matched with the groove, the length of the groove is longer than that of the protrusion, the groove is a sliding track of the protrusion, when the anchoring portion 1 is matched with the fixing portion 3, the protrusion is positioned in the groove, it should be understood that the first connecting portion 13 is the protrusion, and the second connecting portion 32 is the groove, so that the first connecting portion 13 and the second connecting portion 32 can also be of other matching structures, which can enable the anchoring portion 1 and the fixing portion 3 to work cooperatively and cannot hinder the two from separating.

Referring to fig. 5, fig. 5 is a schematic diagram of a guyed tension trabecular reconstruction type proximal intramedullary nail of femur in combination with bone according to the present invention. The use method of the utility model comprises the following steps: drilling a hole at a trabecula bone along a certain angle by adopting a conventional bone surgery implantation method, wherein the angle is set according to the surgery requirement; the traction cable 2 and the fixing part 3 are detachably combined together through a first connecting part 13 and a second connecting part 32, and then the traction cable type tension trabecular bone reconstruction type proximal femoral intramedullary nail of the utility model is implanted into the trabecular bone through an external instrument, it is noted that when the anchoring part 1 reaches a designated position, the anchoring part rotates reversely, the fixing part 3 retreats, because the length of the groove is longer than that of the protrusion, and when retreating, the protrusion can lift the depth of the groove when touching the other end of the groove, so that the first connecting part 13 and the second connecting part 32 can be effectively separated, and it should be understood that: this scheme can by the cooperation between the track arc length that the screw pitch in the fixed part 3 outside and recess formed, the degree of depth, bellied length isopize realizes, belongs to prior art, and when fixed part 3 rolls back, gathers in traction cable 2 roll-off in the 3 inner chambers of fixed part, until when fixed part 3 received traction cable 2's resistance, the explanation was settled and is accomplished. The guyed tension trabecular reconstruction type proximal femoral intramedullary nail provided by the utility model has the advantages that the reconstruction structure of the tension trabecular is added, the better stability is achieved, the guyed tension structure is provided, the occurrence of hip varus is reduced, the stress born by the support trabecular is reduced, the cutting of a tension screw is reduced, and the anti-rotation effect is achieved.

Example 2

Referring to fig. 6 and 7, fig. 6 is a schematic view of another guyed tension trabecular reconstruction type proximal femoral intramedullary nail according to the present invention; FIG. 7 is a schematic view of another pull-cord type tension trabecular bone remodeling proximal femoral intramedullary nail and feeder of the present invention. The present embodiment is substantially the same as the present embodiment, and the difference lies in that the matching manner of the fixing portion 3 and the anchoring portion 1 is different, in the present embodiment, the end surface of the anchoring portion 1 is provided with two centrosymmetric groove-shaped structures 14, the fixing portion 3 is provided with two centrosymmetric through holes 33, the through holes 33 correspond to the groove-shaped structures 14, and the basic structure of the fixing portion 3 may be either a cavity structure or a cylindrical solid; correspondingly, the dragline type tension trabecular bone reconstruction proximal femoral intramedullary nail further comprises a feeder 4, the feeder 4 is provided with a handle for holding, one end of the handle is connected with a rotating rod 41, the rotating rod 41 is matched with the through hole 33 and the groove-shaped structure 14, the number of the rotating rod is also two, and in some embodiments, the matching structures can be three groups, four groups and the like; the rotating rod 41 of the feeder 4 can penetrate into the through hole 33 on the fixing part 3, the anchoring part 1 can be assembled at one end of the rotating rod 41 through the groove-shaped structure 14, and the length of the rotating rod 41 is the distance from the end face of the fixing part 3 to the groove-shaped structure 14. The application method of the embodiment comprises the following steps: the fixing part 3 and the anchoring part 1 are assembled on the feeder 4, the feeder 4 implants the anchoring part 1 and the fixing part 3 thereon to a specified position, and the feeder 4 is withdrawn.

Example 3

Referring to fig. 8, fig. 8 is a schematic view of a detachable traction cable of a tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention. The embodiment is basically the same as the embodiment 2, and the difference is that one end of the traction cable 2 is detachably connected with the anchoring portion 1, correspondingly, a connecting ring 15 can be arranged at the center of the anchoring portion 1, one end of the traction cable 2 can be directly bound on the connecting ring 15, and the length of the traction cable 2 can be flexibly changed according to the operation requirement.

Example 4

Referring to fig. 9, fig. 9 is a schematic view of the combination of a guyed tensioned trabecular bone reconstructive proximal femoral intramedullary nail and an adjusting protective sheath according to the present invention. The embodiment is basically the same as the embodiment 1, and the difference is that the embodiment further includes an adjusting protective sleeve 5, the adjusting protective sleeve 5 is a cylindrical sleeve with openings at two ends, a control groove is reserved at the top of the adjusting protective sleeve, threads (not shown in the figure) are arranged in the outer side of the adjusting protective sleeve, the adjusting protective sleeve can also be set to be a structure in which a main thread 11 is matched with an auxiliary thread 12, and the inner wall of the adjusting protective sleeve 5 is connected with the outer wall of the fixing part 3 through threads (not shown in the figure); its implantation mode can be implant earlier and adjust protective sheath 5, implant anchoring portion 1 and fixed part 3 again, these are conventional operation implantation apparatus, and its implantation mode is current means, in this embodiment, it is greater than to adjust protective sheath 5 diameter anchoring portion 1, fixed part 3 diameter, just adjust protective sheath 5 with fixed part 3 passes through threaded connection, and its advantage lies in, after implanting, conveniently adjusts the tension size that drags rope 2, if when needs are taut relatively, adjust fixed part 3 in adjusting protective sheath 5 relative position can, when preventing its direct contact sclerotin, unnecessary damage is caused in too much adjustment, and it is big to adjust protective sheath 5 area of contact, makes the stiff end more stable, and the cable stability is higher.

Referring to fig. 10, fig. 10 is a schematic view of another adjusting sheath according to the present invention. It should be understood that: in order to improve the stability of the system, one end of the adjusting protective sleeve 5 may be fixed on the outer surface of the bone, for example, a fixing wing 35 is disposed on the end surface of the adjusting protective sleeve 5 for fitting the outer surface of the bone, and may be fixed by a screw, so that the fixing end may be more stable, and also in the embodiment without the adjusting protective sleeve 5, the fixing part 3 may also be provided with the fixing wing 35 and fixed on the outer surface of the bone.

Example 5

Referring to fig. 11, fig. 11 is a schematic view of the combination of a stay-cable type tension trabecular reconstruction type proximal femoral intramedullary nail and a main nail according to the present invention. The present embodiment is substantially the same as embodiment 1, except that it further comprises a main nail 6, it is understood that the main nail 6 is substantially the same as the prior art, and is provided with various screw holes for fixing, and the like, and the difference is that the main nail 6 of the present invention is provided with a fixing hole 61, and the fixing hole 61 is detachably connected with the fixing portion 3, that is, the fixing portion 3 can be correspondingly implanted and fixed on the main nail 6, which further ensures the working effect of the cable by virtue of the stability of the main nail 6, preferably, the fixing hole 61 on the main nail 6 can be adapted to the adjusting protection sleeve 5, and the fixing portion 3 is installed in the adjusting protection sleeve 5, and preferably, the fixing hole 61 can be provided in a plurality, and the angles and directions thereof can be different.

Specifically, the main nail 6 is formed by adding a fixing hole 61 which forms an angle of 65-90 degrees with the main nail 6 at the near end at about 3-4 cm of the near end of the main lag screw hole of the current common intramedullary nail; the corresponding handle arm for positioning is provided with a hole corresponding to the handle arm, a universal sleeve with an angle of 5 degrees and the like, and the universal sleeve is used for implanting the guyed type tension trabecular reconstruction type proximal femoral intramedullary nail, so that after fixation, the guyed cable 2 can be tightened and fixed to form a stay cable, and the function of pulling is achieved.

Example 6

Referring to fig. 12, fig. 12 is a schematic view of another fixing portion according to the present invention. This embodiment is substantially the same as embodiment 1, except that the traction cable 2 is detachably connected to the fixing portion 3, that is, the fixing portion 3 can slide along the traction cable 2 before being installed.

Specifically, the fixing portion 3 has a structure with two open ends, and a plugging cap 34 is disposed at one open end, the plugging cap 34 is connected with the inner wall of the fixing part 3 through threads, when in use, the anchoring part 1 is implanted, the fixing part 3 is implanted along the traction cable 2, at the moment, one end of the traction cable 2 passes through the outside of the fixing part 3 to tighten the traction cable 2, and the plugging cap 34 is screwed into the fixing part 3, the traction cable 2 is clamped and fixed on the side wall, the rest traction cable 2 is cut off, the implantation of the device according to the present invention can be completed, and it should be understood that, in this embodiment, the detachable fixation of the traction cable 2 is realized by the cooperation of the fixation part 3 and the plugging cap 34, and the clamping of the traction cable 2 can also be realized by arranging a rotary opening and closing mechanism in the fixation part 3 to control the opening and closing of the center, which is the prior art.

Preferably, the same fixed part 3 can fix two or more than two anchor parts 1 and draw the cable 2, implant corresponding anchor part 1 in proper order promptly, then wear out same fixed part 3 with drawing the cable 2 again to fasten, in this embodiment fixed part 3 and anchor part 1, draw the cable 2 the cooperation mode very big improvement the flexibility of operation.

It should be understood that examples 1-6 of the present invention are only a part of possible embodiments, and the technical features described therein can be produced and combined according to actual needs.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.

Claims

1. A guyed tension trabecular bone reconstruction proximal femoral intramedullary nail is characterized by comprising an anchoring part, a guyed cable and a fixing part; traction cable one end with the anchor portion links to each other, the other end with the fixed part links to each other, its terminal surface in anchor portion is equipped with first connecting portion, and is corresponding, its one end in fixed part is equipped with the second connecting portion of looks adaptation, first connecting portion with the second connecting portion can be dismantled continuously.

2. The pull-cable type tensioned trabecular bone remodeling proximal femoral intramedullary nail of claim 1, wherein the fixing portion has a cavity structure therein, and the pull cable is movably fixed inside the cavity structure.

3. The stayguy tensioned trabecular reconstruction proximal femoral intramedullary nail of claim 1, wherein said first connection portion is a centrally symmetric groove and said second connection portion is a protrusion adapted to fit into the groove, wherein the length of said groove is longer than the length of said protrusion.

4. The stayguy tensioned trabecular bone remodeling proximal femoral intramedullary nail of claim 1, further comprising a feeder having a rotating rod thereon, wherein the anchoring portion has a groove-shaped structure on an end surface thereof for fitting with the rotating rod, and wherein the fixing portion has a through hole for fitting with the rotating rod.

5. The pull-cable type tensioned trabecular bone remodeling proximal intramedullary nail of claim 4, wherein the fixing portion has a cavity structure therein, and the pull cable is movably fixed inside the cavity structure.