CN212592373U

CN212592373U - Intramedullary nail system

Info

Publication number: CN212592373U
Application number: CN202020783860.8U
Authority: CN
Inventors: 孙德修; 孙硕; 东辉
Original assignee: Shandong Hangwei Orthopedics Medical Instrument Co Ltd
Current assignee: Shandong Hangwei Orthopedics Medical Instrument Co Ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-02-26
Anticipated expiration: 2030-05-13

Abstract

The utility model provides an intramedullary nail system, which comprises a main nail, a blocking cap, a cooling mechanism, cooling liquid and an installation instrument, the main nail is provided with a central hole and a convex thorn, and when in use, the main nail is cooled by a cooling mechanism and cooling liquid, simultaneously, a hole is drilled on the side surface near the joint to the medullary cavity, the medullary cavity is enlarged by a soft medullary expanding drill, then the main nail which is cooled and softened is inserted into the medullary cavity, or the nail is inserted into the nail cooling device together with the cooling mechanism while cooling, the cooling mechanism is removed after the main nail is inserted into the preset position, the main nail is heated and hardened by the temperature of the human body to restore the original mechanical property, at the moment, the convex thorns are supported and even pricked into the inner wall of the medullary cavity to fix the main nail and the bones at the two broken ends of the fracture, then the blocking cap is blocked at the mouth of the central hole, when the main nail needs to be taken out after the fracture is healed, and after the plugging cap is detached, the cooling mechanism is connected to cool the main nail so that the main nail is softened and then taken out.

Description

Intramedullary nail system

Technical Field

The utility model provides a medical instrument, in particular to an intramedullary nail.

Background

The intramedullary nail is used for treating limb fracture clinically, and is a commonly used medical method in China at present. This procedure presents a major surgical injury to the patient due to the need to cut the joint.

SUMMERY OF THE UTILITY MODEL

The utility model provides an intramedullary nail system, which overcomes the defects.

The intramedullary nail system comprises a main nail, a blocking cap, a cooling mechanism and a cooling liquid, wherein the cooling liquid is cold physiological saline, the main nail is provided with a central hole, one end of the central hole is provided with a connecting part, the central hole is a blind hole, the main nail is provided with a convex thorn or a locking nail hole on the outer edges of two ends of a fracture line, the convex thorn is provided with an inner cavity communicated with the central hole, the cooling mechanism is provided with a hose or a U-shaped pipe or a double-cavity pipe, a joint, a pump or an injector, a cooling liquid tank and a liquid storage tank, the cooling liquid is contained in the cooling liquid tank, the hose or the U-shaped pipe or the double-cavity pipe is inserted into the central hole, the connecting part is connected with the joint, the joint is provided with a liquid inlet channel and a liquid outlet channel, the front end of the liquid inlet channel is communicated with the, the other end of the pump is communicated with a cooling liquid tank, the cooling liquid is injected into a hose through a pump or an injector and flows to the liquid storage tank through a central hole, or is injected into a U-shaped pipe or a double-cavity pipe and directly flows to the liquid storage tank to cool the main nail and soften the main nail, the main nail is made of a memory alloy material, and the memory alloy sold in the market at present generally has the temperature reduced to about 4 ℃ and softens.

The double-cavity pipe is provided with an inner cavity and an outer cavity, the inner cavity and the outer cavity are communicated at one end of the double-cavity pipe in a closed mode, the other end of the double-cavity pipe is provided with a pipe orifice, two pipe orifices of the U-shaped pipe or the double-cavity pipe are directly connected with a pump or a syringe, the other pipe orifice of the U-shaped pipe or the double-cavity pipe is directly connected with a storage tank, and the U-shaped pipe or the double-cavity pipe is made of materials.

Further an intramedullary nail system still is equipped with installation apparatus, installation apparatus includes the hand (hold) and hangs tight bolt, the hand (hold) is equipped with hangs tight bolt hole, uses during the operation hang tight bolt and pass hang tight bolt hole, will the main nail is in the same place with the hand (hold) fastening, then handheld hand (hold) inserts the medullary cavity with the main nail, hang tight bolt front end be equipped with the screw thread with the connecting portion cooperation of main nail is connected, it is equipped with the hole to hang tight bolt, the hole front end with the main nail centre bore communicates with each other, the hole rear end be equipped with connecting portion with articulate.

A method for using an intramedullary nail system comprises a main nail, a blocking cap, a cooling mechanism, cooling liquid and a mounting instrument, wherein the main nail is provided with a central hole, a connecting part, a convex spike or a locking nail hole, the cooling mechanism is provided with a hose or a U-shaped pipe or a double-cavity pipe, a joint, a pump or an injector, a cooling liquid tank and a liquid storage tank, the cooling liquid is contained in the cooling liquid tank, the mounting instrument is provided with a handle and a fastening bolt, the main nail is connected with the handle through the fastening bolt when in use, the hose or the U-shaped pipe or the double-cavity pipe is inserted into the central hole, the hose is connected with the pump or the injector through the joint when in use, the outer end of the U-shaped pipe or the double-cavity pipe is directly connected with the pump or the injector when the U-shaped pipe or the double-cavity pipe is used, the liquid storage tank is connected, then the cooling liquid is injected into the hose or the U-shaped pipe or the double-cavity pipe by a pump or an injector to cool the main nail, simultaneously, a hole is drilled on the side surface near the joint to the medullary cavity, the medullary cavity is enlarged by a soft medullary expanding drill, then the handle is held by hand to insert the main nail which is cooled and softened into the medullary cavity, or the nail is inserted with the cooling mechanism while cooling, the cooling mechanism is removed after the main nail is inserted to the preset position, the main nail is heated and hardened by the temperature of the human body to restore the original mechanical property, at the moment, the convex thorns are supported and even pricked into the inner wall of the medullary cavity to fix the main nail and the bones at the two broken ends of the fracture, if the main nail with the locking nail hole is used, the locking nail is driven from the outside at the moment, the main nail is fixed with the bones at the two broken ends of the fracture, then the blocking cap is blocked at the mouth of the central hole, when the main nail needs to be taken out after the fracture is healed, and after the plugging cap is detached, the cooling mechanism is connected to cool the main nail so that the main nail is softened and then taken out.

The intramedullary nail system for treating the four-limb fracture does not need to cut the joint, can select the most favorable nail feeding point, does not need to straighten the channel, avoids destroying too many bones and soft tissues, reduces the operation time and the operation risk, and lightens the operation injury and the pain of the patient.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of an intramedullary nail according to the present invention.

Fig. 2 is a schematic structural view of a second embodiment of an intramedullary nail according to the present invention.

Fig. 3 is a schematic structural view of a third embodiment of an intramedullary nail according to the present invention.

Fig. 4 is a schematic structural view of a fourth embodiment of an intramedullary nail according to the present invention.

Detailed Description

The invention will be further explained by the following examples given in conjunction with the drawings.

Fig. 1 is a first embodiment of an intramedullary nail system of the present invention, which comprises a main nail a1, a plug cap, a cooling mechanism 2 and a cooling liquid, wherein the main nail a1 is provided with a central hole 11, the central hole is a blind hole, a connecting portion 12 is provided at the mouth of the central hole 11, a protruding spine 13 is provided on the outer edge of each of the two ends of a fracture line of the main nail a1, the protruding spine 13 is provided with an inner cavity communicated with the central hole 11, the connecting portion 12 is provided with an internal thread, the cooling mechanism 2 is provided with a hose 21, a connector 22, a pump or an injector, a cooling liquid tank and a liquid storage tank, the cooling liquid is contained in the cooling liquid tank, the hose 21 is inserted into the central hole 11, the front end of the connector 22 is provided with an external thread to be connected with the internal thread in a matching manner, a sealing device is provided between the connecting portion 12, the liquid inlet channel 23 is arranged inside the joint 22, the front end of the liquid inlet channel is communicated with the hose 21, the rear end of the liquid inlet channel is communicated with the pump or the injector, the other end of the pump is communicated with the cooling liquid tank, the liquid inlet channel 23 extends outwards from the joint 2 and is provided with a liquid inlet 231 connected with the pump, the liquid outlet channel 24 is provided with an annular groove 241 and a liquid outlet 242, the annular groove 241 is arranged between the liquid inlet channel and the external thread, the front end of the annular groove is communicated with the central hole 11, the rear end of the annular groove is communicated with the liquid outlet 242, the outer end of the liquid outlet 242 is communicated with the liquid storage tank, the cooling liquid flows into the liquid storage tank through the cooling liquid tank, the pump, the liquid inlet channel 23, the central hole 11 and the liquid outlet channel 24 or flows into the liquid storage tank through the injector injected into the liquid inlet channel 23, the central hole 11, the memory alloy sold in the market at present generally gets soft when the temperature is reduced to about 4 ℃.

Fig. 2 shows a second embodiment of the intramedullary nail system of the present invention, which comprises a main nail B4, a plugging cap, a cooling mechanism and a cooling liquid, wherein the main nail B4 is made of a memory alloy material, the main nail B4 is provided with a central hole 41, a connection portion 42 is provided at an opening portion of the central hole 41, the main nail B4 is provided with locking nail holes 43 at both ends of a fracture line, the cooling mechanism is provided with a U-shaped tube 3 or a dual-cavity tube, the dual-cavity tube is provided with an inner cavity and an outer cavity, the inner cavity and the outer cavity are hermetically communicated at one end of the dual-cavity tube, the other end is provided with a tube opening, one tube opening is directly connected with a pump or a syringe, the other tube opening is directly connected with a liquid storage tank, the U-shaped tube 3 is inserted into the central hole 41, the U-shaped tube 3 or the dual-cavity tube is made of a material such as a memory alloy or copper, or the liquid is injected into the U-shaped pipe 3 or the double-cavity pipe by the injector and flows to a liquid storage tank, and the main nail B4 is cooled to be softened.

Fig. 3-4 show a third and a fourth embodiments of the intramedullary nail system of the present invention, which are the installation devices of fig. 1 or fig. 2, wherein the installation devices comprise a handle 5 and a fastening bolt 6, the handle 5 is provided with a fastening bolt hole, and the fastening bolt 6 is passed through the fastening bolt hole to fasten a main nail a1 or a main nail B4 to the handle 5, and then the handle 5 is held to insert the main nail into the medullary cavity, the front end of the fastening bolt 6 is provided with a thread and is connected with the connecting portion 12 of the main nail in a matching manner, the fastening bolt 6 is provided with an inner hole, the front end of the inner hole is communicated with the central hole of the main nail, and the rear end of the inner hole is provided with the connecting portion and the joint.

Claims

1. The utility model provides an intramedullary nail system, includes main nail and stifled cap, the main nail is equipped with the centre bore, its characterized in that an intramedullary nail system still includes cooling body and coolant liquid, when the medullary cavity was inserted or taken out to the main nail, the coolant liquid passes through cooling body gives the main nail cooling makes the main nail become soft, the main nail body is warm to resume original mechanical properties.

2. An intramedullary nail system according to claim 1, wherein said main nail is made of a memory alloy material.

3. The intramedullary nail system of claim 1, wherein the coolant is cold saline.

4. An intramedullary nail system according to claim 1, wherein said main nail is provided with spikes on the outer edges of the two ends of the fracture line.

5. An intramedullary nail system according to claim 4, wherein said prongs are configured to be hollow, said hollow communicating with said central bore.

6. An intramedullary nail system according to claim 1, wherein said central bore is provided as a blind bore.

7. An intramedullary nail system according to claim 1, wherein the cooling means is provided with a hose or a U-tube or a double lumen tube.

8. The intramedullary nail system of claim 7, wherein the U-shaped tube and the dual-lumen tube are made of a material that is easily deformable and that conducts temperature quickly, such as memory alloy or copper.

9. The intramedullary nail system of claim 1, wherein the cooling mechanism comprises a connector having a fluid inlet channel and a fluid outlet channel, the fluid inlet channel having one end connected to the flexible tube and the other end connected to the pump or the syringe, the fluid outlet channel having one end connected to the central hole and the other end connected to the fluid reservoir.