CN110693591B

CN110693591B - Intramedullary nail with stability

Info

Publication number: CN110693591B
Application number: CN201911008351.6A
Authority: CN
Inventors: 牛新园; 黄敏; 季淑华; 李�灿; 张丛丛
Original assignee: Gu'an Bojian Biotechnology Co ltd
Current assignee: Gu'an Bojian Biotechnology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-09-01
Anticipated expiration: 2039-10-22
Also published as: CN110693591A

Abstract

An intramedullary nail with stability comprises an intramedullary nail, a fixing component arranged in the intramedullary nail and used for preventing the intramedullary nail from shaking, a control rod used for placing and taking out the fixing component, and a sighting device matched with the intramedullary nail and the control rod for use, and is characterized in that the intramedullary nail is a cavity intramedullary nail, a plurality of windows are arranged on the side wall of the intramedullary nail, and the direction of the windows is consistent with the direction of the intramedullary nail; the fixing component comprises an extensible structure, and the extensible structure extends out of the window and is fixed on the wall of the marrow cavity; the control rod is connected with the fixing component in a combined manner; the sighting device is respectively connected with the control rod and the intramedullary nail in a combined manner; the intramedullary nail with the cavity can realize the purpose of arranging the fixing component in the intramedullary nail, the window arranged on the side wall of the intramedullary nail can ensure that the extendable structure of the fixing component in the intramedullary nail extends out of the intramedullary nail, and the extendable structure is fixed on the wall of the marrow cavity, thereby ensuring the stability of the intramedullary nail in the marrow cavity.

Description

Intramedullary nail with stability

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to an intramedullary nail with stability.

Background

Intramedullary nail internal fixation is often used for long-tube bone (such as femur, humerus, ulna, tibia, radius, etc.) diaphysis fracture. The advantages are that: the intramedullary nail is firm and firm, can be fixed with little or no external fixation after operation, and is beneficial to the early movement and exercise of injured limbs; the skin incision is small, the periosteum stripping range is limited, and the damage is small; the axial force line of the fracture part can be controlled, the locked intramedullary nail can prevent the fracture rotation deformity, and the risk of the fracture of the built-in object is reduced; the closed and minimally invasive technology is adopted, so that the surgical infection rate is reduced; reducing damage to periosteum blood circulation, retaining growth factors with osteogenesis effect in hematoma, expanding marrow debris with autologous bone grafting effect, and promoting fracture healing by using factors such as micro-motion generated by muscle contraction to provide mechanical stimulation; the center fixation, the elastic fixation and the stress dispersion avoid the stress shielding effect, and the incidence rate of the re-fracture is low.

Although intramedullary nails have many advantages, in the clinical practice, there are cases where the intramedullary nails are slightly displaced in the medullary cavity, resulting in the formation of bone discontinuities or angulations of the fractured ends.

The invention provides a stable intramedullary nail, aiming at the problem that the intramedullary nail generates slight position deviation in a medullary cavity in the clinical practical application process to cause bone nonunion or angle of a broken end in spite of having a plurality of advantages in the prior art.

Disclosure of Invention

In order to overcome the problems that in the prior art, although the intramedullary nail has a plurality of advantages, in the clinical practical application process, the intramedullary nail is slightly shifted in the medullary cavity, so that the bone is not connected or the broken ends are angled, the invention provides the intramedullary nail with stability.

An intramedullary nail with stability comprises an intramedullary nail, a fixing component arranged in the intramedullary nail and used for preventing the intramedullary nail from shaking, a control rod used for placing and taking out the fixing component, and a sighting device matched with the intramedullary nail and the control rod for use, and is characterized in that the intramedullary nail is a cavity intramedullary nail, a plurality of windows are arranged on the side wall of the intramedullary nail, and the direction of the windows is consistent with the direction of the intramedullary nail; the fixing component comprises an extensible structure, and the extensible structure extends out of the window and is fixed on the wall of the marrow cavity; the control rod is connected with the fixing component in a combined manner; the sighting device is respectively connected with the control rod and the intramedullary nail in a combined manner; the purpose of setting up fixed subassembly in the intramedullary nail can be realized through setting up the cavity intramedullary nail, and the window of setting on the intramedullary nail lateral wall can guarantee that the structure that can stretch out of the inside fixed subassembly of intramedullary nail stretches out the intramedullary nail, thereby the stability of intramedullary nail in the marrow intracavity is guaranteed to the structure that can stretch out on the wall of the marrow cavity, prevents effectively that the intramedullary nail from taking place to rock in the marrow intracavity, avoids the emergence of unnecessary complication, alleviates patient's misery.

Furthermore, the intramedullary nail is a cylindrical cavity intramedullary nail, the diameter of the front end of the intramedullary nail, namely the end which firstly enters the body of the patient, is smaller than the diameter of the main body of the intramedullary nail, the rear end of the intramedullary nail is provided with external threads of the intramedullary nail, and the rear end of the intramedullary nail is connected with the sighting device in a combined way; the intramedullary nail of this arrangement is easily accessible to the patient.

Furthermore, 2 or 4 circular nail holes are respectively arranged at the front end and the rear end of the intramedullary nail, and locking screws which are commonly used clinically are arranged in the circular nail holes; the arrangement can stably fix the intramedullary nail in the marrow cavity and prevent micromotion.

Further, the window is set to be a rectangular window, the window is set on the left side and the right side of the intramedullary nail, the size of the window is larger than that of the extensible structure, the length of the window is smaller than that of the intramedullary nail, and the width of the window is smaller than the diameter of the intramedullary nail; this arrangement ensures that the extendable structure extends beyond the intramedullary nail and ensures the continuity of the intramedullary nail.

Furthermore, the fixing component comprises a fixing seat, the extendable structure connected with the fixing seat in a combined manner and a connecting structure connected with the control rod in a combined manner, and the connecting structure is connected with the extendable structure; the left side and the right side of the fixing seat are respectively provided with an accommodating groove for accommodating the extensible structure, the left accommodating groove and the right accommodating groove are not communicated with each other and are symmetrical to each other, the extensible structure is arranged in the accommodating groove, the size of the accommodating groove is larger than that of the extensible structure, the length of the accommodating groove is smaller than that of the fixing seat, and the width of the accommodating groove is smaller than that of the fixing seat; the extensible structure is accommodated by the accommodating groove, and a space for extending and retracting the extensible structure is provided.

Further, the fixed seat is cylindrical, and the diameter of the fixed seat is smaller than that of the intramedullary nail; the extensible structures are arranged in the left accommodating groove and the right accommodating groove; the fixing seat is easy to put into the intramedullary nail, and the two sides of the fixing seat are provided with the extendable structures to ensure the stability of the fixing seat.

Furthermore, the extensible structure comprises an extensible block and an elastic connecting structure, the part of the extensible block, namely the part located in the accommodating groove, is a rectangular block, the part of the extensible block, namely the part extending out of the window, is a trapezoidal block, and the rectangular block is connected with the trapezoidal block; one end of the elastic connecting structure is connected with the rectangular block, and the other end of the elastic connecting structure is connected with the side wall of the accommodating groove; the arrangement can enable the extension block to have certain elasticity, and when the extension structure reaches the position of the window, the extension block extends out of the window due to the pushing force of the elastic connecting structure, so that the extension block is fixed on the wall of the marrow cavity.

Further, the elastic connecting structure is provided with a spring with moderate elasticity.

Furthermore, the connecting structure comprises a connecting belt for connecting the left side extending block and the right side extending block, a connecting rod connected with the connecting belt, and a connecting ring arranged at one end of the connecting rod, the connecting belt is arranged in the middle of the accommodating groove, and two ends of the connecting belt respectively penetrate through the left side and the right side accommodating groove; one end of the connecting rod is connected with the middle position of the connecting belt, and the other end of the connecting rod extends out of the fixed seat; the connecting ring is arranged at one end of the connecting rod extending out of the fixed seat; the connecting ring is connected with the control rod, and the control rod is pulled outwards to enable the connecting belt to move outwards, so that the extending block is driven to move inwards, and the extending block is retracted into the fixing seat.

Furthermore, the rear end of the fixing seat is provided with a connecting rod channel which can accommodate the connecting rod and faces one end outside the patient body, the length of the connecting rod channel is greater than 1/2 of the length of the fixing seat and is less than the total length of the fixing seat, and the size of the connecting rod channel is greater than that of the connecting rod.

Furthermore, through holes allowing the connecting belt to pass through are respectively formed in the side walls of the left side and the right side of the connecting rod channel, and the size of each through hole is larger than that of each connecting belt; the accommodating grooves on the left side and the right side are communicated with the connecting rod channel through the through holes; the arrangement can ensure that the connecting belt can smoothly move in the through hole.

Further, the control rod comprises a fixed seat connecting rod connected with the fixed seat combination and a traction rod used for drawing the connecting ring; the fixing seat connecting rod is combined and connected with the rear end of the fixing seat, namely one end facing the outside of the patient body, extends out of the intramedullary nail from the rear end of the fixing seat, then penetrates through the sighting device to reach the rear end of the sighting device, namely one end of the sighting device close to an operator; the traction rod penetrates through the sighting device from the rear end of the sighting device to enter the intramedullary nail and then is connected with the connecting ring in a combined mode; when the telescopic intramedullary nail is used, the fixing seat connecting rod is connected with the fixing seat in a combined mode, the fixing seat is pushed or the fixing seat is rotated through the fixing seat connecting rod, when the fixing component needs to be taken out, the fixing component is combined with the connecting ring through the traction rod, the tail end of the traction rod is located at the rear end of the sighting device, the traction rod is pulled backwards, the connecting belt drives the extending blocks on two sides to move towards the accommodating groove, the extending blocks are retracted into the accommodating groove, the traction rod is pulled backwards continuously, and the fixing component is taken out of.

Furthermore, a hook used for being connected with the connecting ring in a combined mode is arranged at the front end of the traction rod, an L-shaped handle convenient for an operator to operate is arranged at the rear end of the traction rod, and the L-shaped handle is connected with the traction rod; the draw bar of this kind of setting is convenient for operating personnel to hand or the tractive.

Furthermore, a threaded cylinder with internal threads is arranged at the rear end of the fixed seat, the threaded cylinder is positioned on the periphery of the opening of the connecting rod channel, and the threaded cylinder is connected with the fixed seat; the diameter of the threaded cylinder is smaller than that of the fixed seat and larger than that of the connecting rod of the fixed seat; the front end of the fixed seat connecting rod is provided with corresponding external threads, and the fixed seat connecting rod is combined and connected with the fixed seat through a threaded cylinder; the connection mode is simple to operate, efficient and time-saving.

Further, the sighting device comprises a connecting section connected with the intramedullary nail and a handheld section held by an operator; the front end of the connecting section, namely one end connected with the intramedullary nail is provided with internal threads corresponding to the external threads of the intramedullary nail; the handheld section comprises a straight section connected with the connecting section and a C-shaped section convenient for an operator to operate, the straight section is positioned at the upper end of the C-shaped section, and the straight section is connected with the C-shaped section; the arrangement is beneficial to smoothly placing the intramedullary nail in the operation process, and is convenient for the operation of operators.

Furthermore, the connecting section is a cylindrical tube, the inner diameter of the connecting section is larger than the outer diameter of the intramedullary nail, a communication hole penetrating through the straight section is arranged in the horizontal direction of the straight section, the communication hole is communicated with the connecting section, and the diameter of the communication hole is equal to that of the connecting section; when the fixing component is required to be taken out, the traction rod is put into the intramedullary nail through the communication hole to be combined and connected with the connecting ring on the fixing seat, and then the fixing component is taken out.

Furthermore, a T-shaped handle is arranged in the communicating hole, the main body of the T-shaped handle is a cylindrical barrel, the tail end of the T-shaped handle is provided with a round hole which is communicated with the main body of the T-shaped handle and allows the fixing seat connecting rod to pass through, and the inner diameter of the T-shaped handle is larger than the outer diameter of the fixing seat connecting rod and smaller than the inner diameter of the communicating hole; the T-shaped handle is sleeved on the periphery of the fixed seat connecting rod and is connected with the fixed seat connecting rod in a combined manner; through with T shape handle and fixing base connecting rod built-up connection, combine into a whole with T shape handle and fixing base connecting rod, rotate T shape handle and can rotate the fixing base connecting rod, when taking out fixed subassembly, in the tractive traction lever makes the piece of stretching out withdraw the fixing base backward, stretch out the piece when rotating the fixing base 90 and hug closely the intramedullary nail inner wall, then draw the fixing base backward out of T shape handle, and then take out whole fixed subassembly.

Furthermore, threaded pipes extending outwards are respectively arranged on the left side wall and the right side wall of the T-shaped handle, and the threaded pipes are communicated with the inside of the T-shaped handle; a screwing handle with threads is arranged in the threaded barrel, and the screwing handle is connected with the threaded barrel in a combined manner; through screwing up the handle to screw thread section of thick bamboo internal rotation to crowded tight the fixing base connecting rod in the T shape handle, make T shape handle and fixing base connecting rod built-up connection be a whole.

When in use, the intramedullary nail is firstly placed in the body of a patient; then the threaded cylinder of the fixing component is combined and connected with the connecting rod of the fixed seat, then the fixing component enters from the communicating hole at the rear end of the straight section of the sighting device, at the moment, the extending block of the fixing component is vertical to the direction of the window of the intramedullary nail, due to the extrusion of the sighting device and the side wall of the intramedullary nail, the extending block is positioned in the accommodating groove of the fixed seat in the moving process, the T-shaped handle is combined and connected with the connecting rod of the fixed seat, the connecting rod of the fixed seat is pushed by the T-shaped handle to push the fixing component forwards, the fixing component enters from the rear end of the straight section of the sighting device, enters the intramedullary nail through the connecting section of the sighting device and continues to move to the window, the fixing component is rotated by 90 degrees at the position which is pre-selected, the extending block of the fixing component is parallel to the direction of the window, the extending block pops up the, then the fixing seat connecting rod is rotated, the fixing seat connecting rod is taken down from the fixing component, and the fixing seat connecting rod is taken out of the body of the patient; when the fixing component needs to be taken out, the traction rod is placed into the intramedullary nail, the hook of the traction rod is connected with the connecting ring combination of the fixing component, the traction rod is pulled backwards, the connecting belt is driven to move backwards, and therefore the extending block is pulled into the accommodating groove, and the traction rod is pulled backwards continuously until the fixing component is withdrawn out of the body of the patient.

Compared with the intramedullary nail in the prior art, the technical scheme of the invention can ensure that the intramedullary nail does not slightly move by arranging the fixing component in the intramedullary nail, enhance the stability of the intramedullary nail in a marrow cavity, avoid the problem that a patient has nonunion or a broken end angulation, and can release the fixing component by pushing the fixing component to a proper position according to the fracture condition of the patient, thereby having flexibility and wide applicability, and being simple to operate, efficient and quick in use and having good technical effect.

Drawings

FIG. 1 is a schematic view of the overall structure of an intramedullary nail having stability according to the present invention;

FIG. 2 is a schematic view of the overall elevation of an intramedullary nail implanting traction rod with stability according to the present invention;

FIG. 3 is an enlarged structural view of a protruding portion of an intramedullary nail with stabilization of the intramedullary nail fixation assembly of the present invention;

FIG. 4 is an enlarged, generally schematic view of a stabilization assembly for an intramedullary nail of the present invention;

FIG. 5 is an enlarged perspective view of the fixation assembly of the intramedullary nail with stabilization of the present invention;

FIG. 6 is an enlarged cross-sectional view of a fixation assembly of an intramedullary nail having stabilization according to the present invention;

FIG. 7 is an enlarged schematic view of the connection point of the intramedullary nail connecting band and the fixing component with stability according to the present invention;

FIG. 8 is an enlarged schematic view of the connection between the extension block and the connection band of the stabilized IM nail fixation assembly of the present invention;

FIG. 9 is an enlarged schematic view of the clevis joint of the coupling ring and the drawbar of the intramedullary nail fixation assembly having stability according to the present invention;

FIG. 10 is an enlarged schematic view of the connection between the intramedullary nail fixing assembly and the fixing base connecting rod according to the present invention;

FIG. 11 is an enlarged cross-sectional view of the connection between the intramedullary nail fixing assembly and the fixing base connecting rod according to the present invention;

FIG. 12 is an enlarged schematic view of an intramedullary nail having stability and a T-handle and aimer attachment of the present invention;

FIG. 13 is a schematic view of the overall structure of an aiming device for an intramedullary nail with stability according to the present invention;

FIG. 14 is a schematic view of the overall posterior structure of an aiming device for an intramedullary nail having stability according to the present invention;

FIG. 15 is a schematic view of an overall cross-sectional configuration of an aimer for an intramedullary nail having stability in accordance with the present invention;

FIG. 16 is a cross-sectional view of the connection between the T-shaped handle and the fixing base of the intramedullary nail with stability according to the present invention;

FIG. 17 is a schematic view of the overall structure of a T-handle of an intramedullary nail having stability in accordance with the present invention;

FIG. 18 is a schematic view of the overall cross-sectional configuration of a T-handle of an intramedullary nail having stability in accordance with the present invention;

fig. 19 is a schematic view of the overall structure of an intramedullary nail having a stabilized intramedullary nail of the present invention.

In the drawings, 1, an intramedullary nail; 11. a rectangular window; 12. external threads of the intramedullary nail; 13. a circular nail hole; 2. a fixing assembly; 21. a fixed seat; 211. accommodating grooves; 212. a connecting rod passage; 213. a through hole; 214. a threaded barrel; 22. a protruding block; 221. a rectangular block; 222. a trapezoidal block; 23. a spring; 24. a connecting belt; 25. a connecting rod; 251. a connecting ring; 3. a fixed seat connecting rod; 4. a draw bar; 41. hooking; 42. an L-shaped handle; 5. a sight; 51. a connecting section; 511. internal threads corresponding to the external threads of the intramedullary nail; 52. a handheld section; 521. a straight section; 5211. a communicating hole; 522. a C-shaped section; 6. a T-shaped handle; 61. a threaded pipe; 62. screwing down the handle; 63. a circular hole.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below by specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and other advantages and effects of the present invention can be easily understood by those skilled in the art from the disclosure of the present specification. The present invention can be implemented or applied by other different specific embodiments, and the features in the following embodiments and embodiments can be combined with each other without conflict, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

EXAMPLE 1 an intramedullary nail with stability

An intramedullary nail with stability, it includes an intramedullary nail 1, set up in intramedullary nail 1 inside used for preventing the intramedullary nail 1 from shaking the fixed assembly 2, the control lever used for putting the fixed assembly 2 into and taking out, and the sighting device 5 used with intramedullary nail 1 and control lever cooperation, characterized by that, the said intramedullary nail 1 is a cavity intramedullary nail 1, set up multiple windows on the sidewall of the intramedullary nail 1, the direction of the window is identical with intramedullary nail 1 direction; the fixing component 2 comprises an extensible structure which extends out of the window and is fixed on the wall of the marrow cavity; the control rod is connected with the fixed component 2 in a combined manner; the sighting device 5 is respectively connected with the control rod and the intramedullary nail 1 in a combined manner; the purpose of setting up fixed subassembly 2 in intramedullary nail 1 can be realized through setting up cavity intramedullary nail 1, and the window of setting on the lateral wall of intramedullary nail 1 can guarantee that the structure that can stretch out of 1 internal fixation subassembly 2 of intramedullary nail 1 stretches out intramedullary nail, thereby the stability of intramedullary nail 1 in the marrow intracavity is guaranteed to the structure that can stretch out on the wall of the marrow cavity, prevents effectively that 1 of intramedullary nail from taking place to rock in the marrow intracavity, avoids the emergence of unnecessary complication, alleviates patient's misery.

The intramedullary nail 1 is a cylindrical cavity intramedullary nail 1, the diameter of the front end of the intramedullary nail 1, namely the end which firstly enters the body of a patient, is smaller than the diameter of the main body of the intramedullary nail 1, the rear end of the intramedullary nail 1 is provided with an intramedullary nail external thread 12, and the rear end of the intramedullary nail 1 is combined and connected with the sighting device 5; this arrangement provides an easy access of the intramedullary nail 1 into the patient.

2 circular nail holes 13 are arranged at the front end of the

intramedullary nail

1, 4 circular nail holes 13 are arranged at the rear end of the intramedullary nail 1, and locking screws which are commonly used in clinic are arranged in the circular nail holes 13; this arrangement stably fixes the intramedullary nail 1 within the medullary cavity, preventing micromotion.

The fixing component 2 comprises a fixing seat 21, the extendable structure combined and connected with the fixing seat 21 and a connecting structure combined and connected with the control rod, wherein the connecting structure is connected with the extendable structure; the left side and the right side of the fixed seat 21 are respectively provided with an accommodating groove 211 for accommodating the extensible structure, the left accommodating groove 211 and the right accommodating groove 211 are not communicated with each other and are symmetrical to each other, the extensible structure is arranged in the accommodating groove 211, the size of the accommodating groove 211 is larger than that of the extensible structure, the length of the accommodating groove 211 is smaller than that of the fixed seat 21, and the width of the accommodating groove 211 is smaller than that of the fixed seat 21; the extensible structure is accommodated by providing the receiving groove 211 to give a space for the extensible structure to extend and retract.

The extensible structure comprises an extensible block 22 and an elastic connecting structure, the part inside the extensible block 22, namely the part located in the accommodating groove 211, is a rectangular block 221, the part outside the extensible block 22, namely the part extending out of the window, is a trapezoidal block 222, and the rectangular block 221 is connected with the trapezoidal block 222; one end of the elastic connecting structure is connected with the rectangular block 221, and the other end of the elastic connecting structure is connected with the side wall of the accommodating groove 211; this arrangement provides some flexibility to extension block 22, such that when the extendable structure reaches the position of the window, extension block 22 extends out of the window due to the urging force of the flexible linkage, thereby securing extension block 22 to the medullary cavity wall.

The connecting structure comprises a connecting belt 24 for connecting the left extending block 22 and the right extending block 22, a connecting rod 25 connected with the connecting belt 24, and a connecting ring 251 arranged at one end of the connecting rod 25, wherein the connecting belt 24 is arranged at the middle position of the accommodating groove 211, and two ends of the connecting belt 24 respectively penetrate through the left and right accommodating grooves 211; one end of the connecting rod 25 is connected with the middle position of the connecting belt 24, and the other end of the connecting rod 25 extends out of the fixed seat 21; the connecting ring 251 is arranged at one end of the connecting rod 25 extending out of the fixed seat 21; this arrangement allows the control rod to be connected to the connection ring 251, and the control rod is pulled outward to move the connection band 24 outward, so as to drive the extension block 22 to move inward, thereby retracting the extension block 22 into the fixing base 21.

A connecting rod channel 212 capable of accommodating the connecting rod 25 is arranged at the rear end of the fixed seat 21, namely the end facing the outside of the patient body, the length of the connecting rod channel 212 is greater than 1/2 of the length of the fixed seat 21 and smaller than the total length of the fixed seat 21, and the size of the connecting rod channel 212 is greater than that of the connecting rod 25.

The side walls of the left side and the right side of the connecting rod channel 212 are respectively provided with a through hole 213 for allowing the connecting band 24 to pass through, and the size of the through hole 213 is larger than that of the connecting band 24; the receiving grooves 211 and the connecting rod passages 212 on the left and right sides are communicated through holes 213; this arrangement ensures that the connection band 24 smoothly moves in the through-hole 213.

The control rod comprises a fixed seat connecting rod 3 connected with the fixed seat 21 in a combined manner and a traction rod 4 used for drawing the connecting ring 251; the fixing seat connecting rod 3 is combined and connected with the rear end of the fixing seat 21, namely one end facing the outside of the patient body, the fixing seat connecting rod 3 extends out of the intramedullary nail 1 from the rear end of the fixing seat 21 and then passes through the sighting device 5 to reach the rear end of the sighting device 5, namely one end of the sighting device 5 close to an operator; the traction rod 4 penetrates through the sighting device 5 from the rear end of the sighting device 5 to enter the intramedullary nail 1, and then is connected with the connecting ring 251 in a combined manner; when the intramedullary nail fixing device is used, the fixing seat connecting rod 3 is connected with the fixing seat 21 in a combined mode, the fixing seat 21 is pushed or the fixing seat 21 is rotated through the fixing seat connecting rod 3, when the fixing component 2 needs to be taken out, the fixing component 2 is combined with the connecting ring 251 through the traction rod 4, the tail end of the traction rod 4 is located at the rear end of the sighting device 5, the traction rod 4 is pulled backwards, the connecting belt 24 drives the extending blocks 22 on two sides to move towards the accommodating groove 211, the extending blocks 22 are retracted into the accommodating groove 211, the traction rod 4 is pulled backwards continuously, and the fixing component 2 is taken out.

A hook 41 used for being connected with the connecting ring 251 in a combined manner is arranged at the front end of the traction rod 4, an L-shaped handle 42 convenient for an operator to operate is arranged at the rear end of the traction rod 4, and the L-shaped handle 42 is connected with the traction rod 4; the traction rod 4 is convenient for operators to hold or draw.

A threaded cylinder 214 with internal threads is arranged at the rear end of the fixed seat 21, the threaded cylinder 214 is positioned at the periphery of the opening of the connecting rod channel 212, and the threaded cylinder 214 is connected with the fixed seat 21; the diameter of the thread cylinder 214 is smaller than that of the fixed seat 21 and larger than that of the fixed seat connecting rod 3; the front end of the fixed seat connecting rod 3 is provided with a corresponding external thread, and the fixed seat connecting rod 3 is combined and connected with the fixed seat 21 through a thread cylinder 214; the connection mode is simple to operate, efficient and time-saving.

The aiming device 5 comprises a connecting section 51 connected with the intramedullary nail 1 and a handheld section 52 for holding by an operator; the front end of the connecting section 51, namely the end connected with the intramedullary nail 1 is provided with an internal thread 511 corresponding to the external thread of the intramedullary nail; the handheld section 52 comprises a straight section 521 connected with the connecting section 51 and a C-shaped section 522 convenient for an operator to operate, wherein the straight section 521 is positioned at the upper end of the C-shaped section 522, and the straight section 521 is connected with the C-shaped section 522; the arrangement is beneficial to smoothly embedding the intramedullary nail 1 in the operation process and is convenient for the operation of operators.

The connecting section 51 is a cylindrical tube, the inner diameter of the connecting section 51 is larger than the outer diameter of the intramedullary nail 1, a communication hole 5211 penetrating through the straight section 521 is arranged in the horizontal direction of the straight section 521, the communication hole 5211 is communicated with the connecting section 51, and the diameter of the communication hole 5211 is equal to that of the connecting section 51; when the intramedullary nail is used, the fixing seat 21 and the fixing seat connecting rod 3 are placed into the intramedullary nail 1 through the communicating hole 5211, when the fixing component 2 needs to be taken out, the traction rod 4 is placed into the intramedullary nail 1 through the communicating hole 5211 to be combined and connected with the connecting ring 251 on the fixing seat 21, and then the fixing component 2 is taken out.

EXAMPLE 2 an intramedullary nail with stability

2 circular nail holes 13 are arranged at the front end of the

intramedullary nail

The window is set to be a rectangular window 11, the window is arranged on the left side and the right side of the intramedullary nail 1, the size of the window is larger than that of the extensible structure, the length of the window is smaller than that of the intramedullary nail 1, and the width of the window is smaller than the diameter of the intramedullary nail 1; this arrangement ensures that the extendable structure extends beyond the intramedullary nail 1 and ensures continuity of the intramedullary nail 1.

A threaded cylinder 214 with internal threads is arranged at the rear end of the fixed seat 21, the threaded cylinder 214 is positioned at the periphery of the opening of the connecting rod channel 212, and the threaded cylinder 214 is connected with the fixed seat 21; the diameter of the thread cylinder 214 is smaller than that of the fixed seat 21 and larger than that of the fixed seat connecting rod 3; the front end of the fixed seat connecting rod 3 is provided with a corresponding intramedullary nail external thread 12, and the fixed seat connecting rod 3 is combined and connected with the fixed seat 21 through a thread cylinder 214; the connection mode is simple to operate, efficient and time-saving.

EXAMPLE 3 an intramedullary nail with stability

2 circular nail holes 13 are arranged at the front end of the

intramedullary nail

The fixing seat 21 is cylindrical, and the diameter of the fixing seat 21 is smaller than that of the intramedullary nail 1; the extensible structures are arranged in the left accommodating groove 211 and the right accommodating groove 211; the fixing seat 21 is easy to be arranged in the intramedullary nail 1, and the two sides of the fixing seat are provided with the extendable structures to ensure the stability of the fixing seat 21.

The elastic connection structure is provided with a spring 23 with moderate elasticity.

EXAMPLE 4 an intramedullary nail with stability

2 circular nail holes 13 are arranged at the front end of the

intramedullary nail

The aiming device 5 comprises a connecting section 51 connected with the intramedullary nail 1 and a handheld section 52 for holding by an operator; the front end of the connecting section 51, namely the end connected with the intramedullary nail 1 is provided with an internal thread 511 corresponding to the external thread of the intramedullary nail 1; the handheld section 52 comprises a straight section 521 connected with the connecting section 51 and a C-shaped section 522 convenient for an operator to operate, wherein the straight section 521 is positioned at the upper end of the C-shaped section 522, and the straight section 521 is connected with the C-shaped section 522; the arrangement is beneficial to smoothly embedding the intramedullary nail 1 in the operation process and is convenient for the operation of operators.

A T-shaped handle 6 is arranged in the communication hole 5211, the main body of the T-shaped handle 6 is a cylindrical tube, the tail end of the T-shaped handle 6 is provided with a circular hole 63 which is communicated with the main body of the T-shaped handle 6 and allows the fixing seat connecting rod 3 to pass through, and the inner diameter of the T-shaped handle 6 is larger than the outer diameter of the fixing seat connecting rod 3 and smaller than the inner diameter of the communication hole 5211; the T-shaped handle 6 is sleeved on the periphery of the fixed seat connecting rod 3, and the T-shaped handle 6 is connected with the fixed seat connecting rod 3 in a combined manner; through with T shape handle 6 and 3 built-up connection of fixing base connecting rod, make up T shape handle 6 and fixing base connecting rod 3 as a whole, rotate T shape handle 6 and can rotate fixing base connecting rod 3, when taking out fixed subassembly 2, in drawing traction lever 4 makes to stretch out piece 22 and withdraw fixing base 21 backward, stretch out piece 22 and hug closely intramedullary nail 1 inner wall when rotating fixing base 21 90, then draw T shape handle 6 backward and draw out fixing base 21, and then take out whole fixed subassembly 2.

Threaded pipes 61 extending outwards are respectively arranged on the left side wall and the right side wall of the T-shaped handle 6, and the threaded pipes 61 are communicated with the inside of the T-shaped handle 6; a threaded tightening handle 62 is arranged in the threaded barrel 214, and the tightening handle 62 is connected with the threaded barrel 214 in a combined manner; the screwing handle 62 is rotated towards the thread cylinder 214, so that the fixing seat connecting rod 3 in the T-shaped handle 6 is tightly squeezed, and the T-shaped handle 6 and the fixing seat connecting rod 3 are connected into a whole in a combined mode.

The above description of the embodiments is only for the understanding of the present invention. It should be noted that modifications could be made to the invention without departing from the principle of the invention, which would also fall within the scope of the claims of the invention.

Claims

1. An intramedullary nail with stability, which comprises an intramedullary nail (1), a fixing component (2) arranged in the intramedullary nail (1) for preventing the intramedullary nail (1) from shaking, a control rod for placing and taking out the fixing component (2), and a sighting device (5) matched with the intramedullary nail (1) and the control rod for use, and is characterized in that the intramedullary nail (1) is a cavity intramedullary nail (1), a plurality of windows are arranged on the side wall of the intramedullary nail (1), and the direction of the windows is consistent with the direction of the intramedullary nail (1); the fixed component (2) comprises an extensible structure, a fixed seat (21) connected with the extensible structure in a combined mode and a connecting structure connected with the control rod in a combined mode, and the extensible structure extends out of the window and is fixed on the wall of the marrow cavity; the control rod is connected with the fixed component (2) in a combined manner; the sighting device (5) is respectively connected with the control rod and the intramedullary nail (1) in a combined manner; the left side and the right side of the fixed seat (21) are respectively provided with a containing groove (211) for containing the extendable structure, the containing groove (211) on the left side and the containing groove (211) on the right side are not communicated with each other and are symmetrical to each other, the extendable structure is arranged in the containing groove (211), the connecting structure is connected with the extendable structure, the extensible structure comprises an extensible block (22) and an elastic connection structure, the extensible block (22) comprises a left extensible block (22) and a right extensible block (22), the connection structure comprises a connection belt (24) for connecting the left extensible block (22) and the right extensible block (22), and a connection rod (25) connected with the connection belt (24), the connecting ring (251) is arranged at one end of the connecting rod (25), the connecting belt (24) is arranged in the middle of the accommodating groove (211), and two ends of the connecting belt (24) penetrate through the left and right accommodating grooves (211) respectively; one end of the connecting rod (25) is connected with the middle position of the connecting belt (24), and the other end of the connecting rod (25) extends out of the fixed seat (21); the connecting ring (251) is arranged at one end of the connecting rod (25) extending out of the fixed seat (21).

2. The stabilized intramedullary nail according to claim 1, characterized in that the intramedullary nail (1) is a cylindrical cavity intramedullary nail (1), the diameter of the front end of the intramedullary nail (1), i.e. the end which enters the patient first, is smaller than the diameter of the main body of the intramedullary nail (1), the rear end of the intramedullary nail (1) is provided with external threads, and the rear end of the intramedullary nail (1) is connected with the aiming device (5) in a combination way.

3. Intramedullary nail with stabilization according to claim 1, characterized in that the size of said receiving groove (211) is greater than the size of the extractable structure, the length of the receiving groove (211) is smaller than the length of the fixation seat (21), the width of the receiving groove (211) is smaller than the width of the fixation seat (21).

4. Intramedullary nail with stability according to claim 3, characterized in that the portion inside said protruding block (22), i.e. inside said receiving slot (211), is provided as a rectangular block (221), the portion outside said protruding block (22), i.e. outside said window, is provided as a trapezoidal block (222), the rectangular block (221) being connected to the trapezoidal block (222); one end of the elastic connecting structure is connected with the rectangular block (221), and the other end of the elastic connecting structure is connected with the side wall of the accommodating groove (211).

5. Intramedullary nail with stabilization according to claim 3, characterized in that at the rear end of said fixation seat (21), i.e. the end facing the outside of the patient's body, a connection rod channel (212) is provided which is able to accommodate said connection rod (25), the length of the connection rod channel (212) being greater than 1/2 of the length of the fixation seat (21) and less than the total length of the fixation seat (21), the size of the connection rod channel (212) being greater than the size of the connection rod (25).

6. The stabilized intramedullary nail according to claim 5, wherein a through hole (213) allowing the connecting strap (24) to pass through is provided on each of the left and right side walls of the connecting rod channel (212), the size of the through hole (213) being larger than that of the connecting strap (24); the accommodation grooves (211) on the left and right sides and the connecting rod channel (212) are communicated through the through hole (213).

7. Intramedullary nail with stabilization according to claim 1, characterized in that said control rod comprises a permanent seat connecting rod (3) connected in combination with said permanent seat (21) and a traction rod (4) for traction of said connecting ring (251); the fixing seat connecting rod (3) is connected with the rear end of the fixing seat (21), namely one end facing the outside of the patient body in a combined manner, the fixing seat connecting rod (3) extends out of the intramedullary nail (1) from the rear end of the fixing seat (21), and then passes through the sighting device (5) to reach the rear end of the sighting device (5), namely one end of the sighting device (5) close to an operator; the traction rod (4) penetrates through the sighting device (5) from the rear end of the sighting device (5) to enter the intramedullary nail (1), and then is connected with the connecting ring (251) in a combined mode.

8. The intramedullary nail with stability according to claim 7, wherein a hook (41) for combined connection with the connecting ring (251) is arranged at the front end of the traction rod (4), an L-shaped handle (42) convenient for operation of an operator is arranged at the rear end of the traction rod (4), and the L-shaped handle (42) is connected with the traction rod (4).

9. Intramedullary nail with stability according to claim 1, characterized in that said aimer (5) comprises a connecting segment (51) connected to said intramedullary nail (1) and a handling segment (52) for the operator to hold; the front end of the connecting section (51), namely one end connected with the intramedullary nail (1), is provided with internal threads; the handheld section (52) comprises a straight section (521) connected with the connecting section (51) and a C-shaped section (522) convenient for an operator to operate, the straight section (521) is positioned at the upper end of the C-shaped section (522), and the straight section (521) is connected with the C-shaped section (522).