CN213129836U - Universal hollow nail with bone cement - Google Patents

Abstract

The utility model provides a universal hollow nail with bone cement, includes injection subassembly and fixed subassembly, the injection subassembly include one be equipped with the sleeve of bone cement and set up the piston core bar in the sleeve, fixed subassembly include a screw rod and set up at the terminal hollow thread of screw rod, the sleeve with the screw rod be linked together, hollow thread on seted up a plurality of scattered mud holes. A certain amount of bone cement is injected into the bone structure, so that the instant stability of internal fixation is improved, the bone cement filled loose gap has a certain buffer effect on the fracture structure and the adjacent part, the local stress around the fracture is reduced, and the cutting, the puncture and the nail withdrawal of the hollow nail after the operation can be effectively avoided. The joint of the patient is kept, the patient can get out of the bed in the early stage after operation and can move with load, and the occurrence of deep vein thrombosis, bedsore, dropsy pneumonia and urinary infection caused by long-term bed rest is avoided.

Description

Universal hollow nail with bone cement

Technical Field

The utility model belongs to the technical field of medical instrument and specifically relates to an universal hollow nail with bone cement.

Background

At present, the hollow nail, the intramedullary nail, the Dynamic Hip Screw (DHS), the locking steel plate and the like are mainly adopted clinically for treating femoral neck fracture. At present, the treatment of femoral neck fracture at home and abroad still mainly adopts hollow nails.

However, when the hollow nail is used, if a patient with senile osteoporosis or a young patient with osteoporosis caused by bone metabolic disease, serious complications such as screw cutting or screw penetrating out of the acetabulum, nail withdrawing, even nail and plate breaking and the like occur, so that the internal fixation fails to break.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides an universal hollow nail with bone cement.

The technical proposal of the utility model for solving the technical problem is that: the utility model provides a universal hollow nail with bone cement, includes injection subassembly and fixed subassembly, the injection subassembly include one be equipped with the sleeve of bone cement and set up the piston core bar in the sleeve, fixed subassembly include a screw rod and set up at the terminal hollow thread of screw rod, the sleeve with the screw rod be linked together, hollow thread on seted up a plurality of scattered mud holes.

Preferably, a first sludge dispersing channel is arranged in the sleeve, a second sludge dispersing channel is arranged in the screw, the first sludge dispersing channel is communicated with the second sludge dispersing channel, and the second sludge dispersing channel is communicated with the sludge dispersing hole.

Preferably, the sleeve is connected with the screw rod through a connecting piece.

Preferably, a third sludge dispersing channel penetrates through the connecting piece, and the third sludge dispersing channel is respectively communicated with the first sludge dispersing channel and the second sludge dispersing channel.

Preferably, one end of the connecting piece is inwards concavely provided with a positioning pin hole, the sleeve is outwards extended with a positioning pin shaft, the positioning pin shaft is inserted into the positioning pin hole, the third mud dispersing channel is arranged in the positioning pin shaft, and the other end of the connecting piece is in threaded connection with the screw rod.

Preferably, the tail end of the hollow thread is provided with a self-tapping nail head.

Preferably, the mud dispersing holes are spirally and uniformly distributed from the position close to the screw to the position far away from the screw.

Preferably, the fixing component is made of a titanium alloy material.

Preferably, the screw is provided with a spherical pressure head.

Preferably, the length of the hollow thread is 16mm or 32 mm.

The beneficial effects of the utility model reside in that: 1. a certain amount of bone cement is injected into the bone structure, so that the instant stability of internal fixation is improved, the bone cement filled loose gap has a certain buffer effect on the fracture structure and the adjacent part, the local stress around the fracture is reduced, and the cutting, the puncture and the nail withdrawal of the hollow nail after the operation can be effectively avoided. The joint of the patient is kept, the patient can get out of the bed in the early stage after operation and can move with load, and the occurrence of deep vein thrombosis, bedsore, dropsy pneumonia and urinary infection caused by long-term bed rest is avoided. 2. The special injection assembly design can effectively prevent the bone cement from leaking, and the bone cement can be uniformly dispersed from the hollow nail mud dispersing holes, so that the stress around the fracture can be effectively dispersed. Meanwhile, the injection assembly can quantitatively push the bone cement, so that researchers can further do more clinical and biomechanical basic researches.

Drawings

Fig. 1 is a half sectional view of the overall structure of the present invention.

Fig. 2 is an exploded view of the overall structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, the universal hollow nail with bone cement comprises an injection assembly 1 and a fixing assembly 2, wherein the injection assembly 1 comprises a sleeve 3 filled with bone cement 16 and a piston core rod 4 arranged in the sleeve 3, the fixing assembly 2 comprises a screw rod 5 and a hollow thread 6 arranged at the tail end of the screw rod, the sleeve 3 is communicated with the screw rod 5, and a plurality of mud dispersing holes 7 are formed in the hollow thread 6. During the use, fix on human thighbone through hollow thread 6 earlier, then through piston core bar 4 propelling movement injection bone cement 16 for bone cement 16 mud flows into hollow thread 6 along screw rod 5 inside, evenly scatters out from the scattered mud hole 7 of hollow thread 6 at last, bone cement 16 combines the back with the thighbone, the instant stability of internal fixation has been improved, and bone cement 16 fills loose clearance and has certain cushioning effect to fracture structure and adjacent part, the local stress around the fracture has been reduced, can effectively avoid postoperative hollow nail to cut out, puncture, retreat the nail. The joint of the patient is kept, the patient can get out of the bed in the early stage after operation and can move with load, and the occurrence of deep vein thrombosis, bedsore, dropsy pneumonia and urinary infection caused by long-term bed rest is avoided.

In the present embodiment, the flow lines and structures of the concrete bone cement 16 inside are set as follows: the sleeve 3 in be equipped with first mud passageway 8 that looses, screw rod 5 in be equipped with the second and loose mud passageway 9, first mud passageway 8 that looses and second loose mud passageway 9 and be linked together, the second loose mud passageway 9 with loose mud hole 7 and be linked together. So that the bone cement 16 enters the second cement dispersing channel 9 through the first cement dispersing channel 8 and is uniformly dispersed from the cement dispersing hole 7.

Preferably, the sleeve 3 is connected with the screw 5 through a connecting piece 10. Guarantee through this connecting piece 10 that can be inseparabler between sleeve 3 and the screw rod 5 to guarantee the leakproofness of 16 injections of bone cement, at injection subassembly 1 injection back that finishes simultaneously, this injection subassembly 1 can break away from with fixed subassembly 2 through this connecting piece 10, the separation function after the injection subassembly 1 injection finishes conveniently.

The flow lines and structures of the bone cement 16 inside are specifically configured after the connector 10 is designed: a third sludge dispersing channel 11 penetrates through the connecting piece 10, and the third sludge dispersing channel 11 is respectively communicated with the first sludge dispersing channel 8 and the second sludge dispersing channel 9. Thus, after the connector 10 is arranged, bone cement 16 is introduced from the first cement channel 8 into the third cement channel 11 and then into the second cement channel 9.

Preferably, one end of the connecting piece 10 is inwards provided with a positioning pin hole 12 in an inwards concave manner, the sleeve 3 is outwards extended with a positioning pin shaft 13, and the positioning pin shaft 13 is inserted into the positioning pin hole 12, so that the connecting piece 10 and the sleeve 3 are accurately positioned, and the sealing performance during injection is ensured. And the third mud dispersing channel 11 is arranged in the positioning pin shaft 13, and the other end of the connecting piece 10 is in threaded connection with the screw rod 5, so that the connecting piece 10 is stably connected with the fixing component 2 and is easy to detach.

In this embodiment, the end of the hollow thread 6 is provided with a self-tapping head 14. Therefore, the fixing component can directly enter the femur through the self-tapping nail head 14 without punching the femur by an external tool, so that the operation steps are reduced, the efficiency is improved, and the patient is prevented from suffering pain again.

In this embodiment, the mud holes 7 are spirally and uniformly distributed from the position close to the screw 5 to the position far from the screw 5. The uniform distribution of the mud dispersing holes 7 is ensured through the design, so that the bone cement 16 can be uniformly dispersed in the bone, and the femur has better stability.

Moreover, because the fixing component 2 needs to be screwed into the femur, the titanium alloy material has good biocompatibility, and simultaneously, the hardness and the rigidity of the metal are considered, the fixing component 2 is preferably made of the titanium alloy material.

Preferably, the screw 5 is provided with a spherical pressure head 15. Therefore, after the fixing component 2 is screwed into the femur, a certain pressurizing effect can be achieved through the spherical pressure head 15, and the stability of the femur is ensured.

Preferably, the length of the hollow thread 6 is 16mm or 32 mm. The design of two thread lengths is more beneficial to clinical selection and compression fixation of fracture.

The above embodiment is only one of the preferable embodiments of the present patent, and any changes made without departing from the scope of the present patent are within the scope of the present patent.

Claims (10)

1. The utility model provides a universal hollow nail with bone cement which characterized in that: the injection assembly comprises a sleeve filled with bone cement and a piston core rod arranged in the sleeve, and the fixing assembly comprises a screw and a hollow thread arranged at the tail end of the screw, the sleeve is communicated with the screw, and a plurality of mud dispersing holes are formed in the hollow thread.

2. Universal hollow nail with bone cement according to claim 1, characterized in that: the sleeve in be equipped with first mud passageway that looses, the screw rod in be equipped with the second and loose the mud passageway, first mud passageway and the second of loosing loose mud passageway be linked together, the second loose the mud passageway with loose the mud hole be linked together.

3. Universal hollow nail with bone cement according to claim 2, characterized in that: the sleeve is connected with the screw rod through a connecting piece.

4. Universal hollow nail with bone cement according to claim 3, characterized in that: and a third sludge dispersing channel penetrates through the connecting piece, and is respectively communicated with the first sludge dispersing channel and the second sludge dispersing channel.

5. Universal hollow nail with bone cement according to claim 4, characterized in that: one end of the connecting piece is inwards concavely provided with a positioning pin hole, the sleeve is outwards extended with a positioning pin shaft, the positioning pin shaft is inserted into the positioning pin hole, the third mud dispersing channel is arranged in the positioning pin shaft, and the other end of the connecting piece is in threaded connection with the screw rod.

6. Universal hollow nail with bone cement according to claim 1, characterized in that: the tail end of the hollow thread is provided with a self-tapping nail head.

7. Universal hollow nail with bone cement according to claim 1, characterized in that: the mud dispersing holes are spirally and uniformly distributed from the position close to the screw to the position far away from the screw.

8. Universal hollow nail with bone cement according to claim 1, characterized in that: the fixing component is made of titanium alloy materials.

9. Universal hollow nail with bone cement according to claim 1, characterized in that: the screw is provided with a spherical pressure head.

10. Universal hollow nail with bone cement according to claim 1, characterized in that: the length of the hollow thread is 16mm or 32 mm.

Images