CN113974805A - External fixator for tibiofibula - Google Patents
External fixator for tibiofibula Download PDFInfo
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- CN113974805A CN113974805A CN202111498885.9A CN202111498885A CN113974805A CN 113974805 A CN113974805 A CN 113974805A CN 202111498885 A CN202111498885 A CN 202111498885A CN 113974805 A CN113974805 A CN 113974805A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/66—Alignment, compression or distraction mechanisms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B2017/603—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors with three points of contact, e.g. tripod
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Abstract
The invention provides a tibiofibula external fixation instrument, which comprises a fixing ring for fixing at the metaphysis of a patient, a supporting rod connected with the fixing ring, an auxiliary rod for keeping a fixed angle, and a universal joint for fixing the auxiliary rod; the fixing ring is provided with a sliding structure capable of adjusting a fixing angle after operation; a first connecting rod is arranged in the sliding structure, and a first universal joint is arranged on the first connecting rod; the supporting rod is connected with the first connecting rod through a first universal joint; an adjusting structure capable of adjusting the length of the supporting rod and locking the supporting rod after adjustment is arranged in the supporting rod, and two ends of the auxiliary rod are respectively connected with the fixing ring and the supporting rod through a universal joint II; the auxiliary rod has a pre-bent radian, and can effectively prevent the auxiliary rod from injuring the soft tissues of the lower limbs of a patient when in use.
Description
Technical Field
The invention belongs to the technical field of medical equipment, and particularly relates to a tibiofibula external fixation device.
Background
Generally, tibiofibula fracture is reduced by a manual method, and external fixation or incision internal fixation (including steel plates or intramedullary nails) is performed by using a splint, wherein the fixation is often not firm, and the wound is not easy to treat; the latter has great tissue damage and high medical cost, and has the advantages and disadvantages of secondary operation for taking steel plates; the reduction external fixation of the calf tibiofibula fracture is between the two types, and the existing orthopedic external fixation bracket has various forms, but can be divided into three types of annular, semi-annular and single-side on the whole; compared with annular and semi-annular structures, the external tibiofibula fixing bracket with the single-side structure has the characteristics of compact structure, low manufacturing cost, convenience in wearing and the like; however, the existing external tibial and fibular fixing bracket with a single-side structure has the problem of unstable angle after adjustment, and the lever action force is large, so that the patient can not heal or has angular deformity at the metaphysis; in addition, the auxiliary rod of the prior tibiofibula external fixation bracket does not have a pre-bent radian, easily stimulates the soft tissue of the lower leg when in use, and can not finely adjust and pressurize the fixed angle after operation.
Therefore, the invention provides a tibiofibular external fixation instrument with better stability, no stimulation to soft tissues of a lower leg and capability of fine angle adjustment after operation.
Disclosure of Invention
In order to overcome the problems presented in the background art, the present invention provides a tibiofibular external fixation instrument.
The tibiofibula external fixator comprises a fixing ring for fixing at the metaphysis of a patient, a supporting rod connected with the fixing ring, an auxiliary rod for keeping a fixed angle, and a universal joint for fixing the auxiliary rod; the fixing ring is provided with a sliding structure capable of adjusting a fixing angle after operation; a first connecting rod is arranged in the sliding structure, and a first universal joint is arranged on the first connecting rod; the supporting rod is connected with the first connecting rod through a first universal joint; an adjusting structure capable of adjusting the length of the supporting rod and locking the supporting rod after adjustment is arranged in the supporting rod, and two ends of the auxiliary rod are respectively connected with the fixing ring and the supporting rod through a universal joint II; the auxiliary rod is provided with a pre-bent radian, so that the auxiliary rod can be effectively prevented from injuring soft tissues of lower limbs of a patient when in use, and the position of the supporting rod and the auxiliary rod can be adjusted after the supporting rod and the auxiliary rod are fixed through the sliding structure by arranging the sliding structure on the fixing ring; the fixed angle is adjusted by arranging a universal joint; through set up regulation structure in the bracing piece, realize when the bracing piece shortens to the pressurization of fixed angle.
Further, the sliding structure arranged on the fixing ring comprises a sliding groove arranged on the fixing ring; the sliding groove is consistent with the shape of the fixing ring, the fixing plate is arranged in the sliding groove, and the flexible adjustment of the position of the supporting rod and the size of the angle between the connecting rod and the auxiliary rod can be realized through the sliding groove.
Furthermore, the fixing ring is U-shaped or C-shaped, and the inner side of the fixing ring can better conform to the radian of the shank of a human body.
Furthermore, the first connecting rod is a threaded rod and is arranged in the sliding groove, and locking nuts are arranged at the first end and the second end of the first connecting rod; the first connecting rod is fixed by screwing the locking nut; when the locking nut does not lock the first position of the connecting rod, the first connecting rod can move and be adjusted along the wall of the sliding groove.
Further, the fixing ring is connected with the supporting rod through a universal joint arranged on the first connecting rod; the universal joint can carry out spacing fixed to the bracing piece, can adjust the setting to the tight angle of clamp of bracing piece through universal joint.
Further, the support rod includes: the first support rod and the second support rod; the first support rod is internally provided with a first accommodating cavity for accommodating a second support rod, a first end of the first support rod is connected with the fixing ring, a second end of the first support rod is connected with the second support rod, and a first end of the second support rod is provided with an anti-drop interlayer to avoid the second support rod from being separated from the first support rod.
Furthermore, the adjusting structure is arranged at the second end of the first supporting rod, and the second supporting rod is locked after extending out of the first supporting rod through the adjusting structure.
Further, the adjustment structure includes: the adjusting component, the cam deflector rod and the fixed pressing block are arranged on the cam deflector rod; a limiting bulge is arranged in the accommodating cavity of the first supporting rod, and a limiting groove is arranged on the outer wall of the second supporting rod; an open slot communicated with the first supporting rod is arranged on the adjusting component; a connecting hole is arranged in the open slot; connecting shafts are arranged on two sides of the cam deflector rod and connected with the connecting holes, and the cam deflector rod rotates through the connecting shafts; the fixed pressing block is arranged below the cam deflector rod, and the fixed pressing block cannot displace when the second supporting rod is separated from the second supporting rod; when the cam deflector rod is vertical to the first support rod or the second support rod, the second support rod can be pulled out of the first support rod in a release state; when the cam deflector rod is tangent to the first supporting rod, the adjusting structure is in a locking state, and the second supporting rod cannot move; this setting can be regulated and control the whole length of bracing piece, can pressurize fixed angle when shortening the whole length of bracing piece simultaneously.
Alternatively, the adjustment structure comprises: a length adjusting rod and an adjusting rotating shaft; a first accommodating cavity is formed in the first supporting rod, and a first threaded section is formed in the first accommodating cavity; a second accommodating cavity is formed in the second supporting rod, and a second threaded section is formed in the second accommodating cavity; the adjusting rotating shaft is arranged at the second end of the first supporting rod; a third threaded section is arranged on the inner wall of the adjusting rotating shaft; the first supporting rod is connected with the second supporting rod through the length adjusting rod, the first end of the length adjusting rod extends into the first accommodating cavity, and the second end of the length adjusting rod extends into the second accommodating cavity; the length adjusting rod extends out of the first accommodating cavity arranged on the first supporting rod by rotating the adjusting rotating shaft clockwise or anticlockwise, so that the length of the supporting rod is extended.
Furthermore, a first end and a second end of the fixing ring are respectively provided with a second connecting rod and are fixed through a locking nut, a second universal joint is arranged on the second connecting rod, a third universal joint is arranged at the second end of the second supporting rod, a first end of the auxiliary rod is connected with the second universal joint, a second end of the auxiliary rod is connected with the third universal joint, and the auxiliary rod is fixed and adjusted through the second universal joint and the third universal joint; the stability of fixed back angle has been improved through setting up the auxiliary rod, and what can be better carries out fixed stay to the bracing piece.
Furthermore, the auxiliary rod is divided into an auxiliary rod I and an auxiliary rod II and is respectively connected with a universal joint II and two universal joints III on the two connecting rods II; and the first auxiliary rod and the second auxiliary rod are provided with pre-bent radians, and the pre-bent radians can bypass the muscular tissues from the outer side to form a stable tripod with the support rod, so that the support strength is enhanced, and the soft tissues of the legs are prevented from being stimulated.
Furthermore, a universal joint IV is further arranged on the supporting rod I, and a fixing needle for fixing the fracture part is arranged on the universal joint IV.
Furthermore, the universal joint I, the universal joint II, the universal joint III and the universal joint IV have the same structure and respectively comprise a connecting assembly, a clamping assembly, a limiting assembly and a locking bolt; the connecting component is provided with a first through hole and a second through hole which are longitudinally and horizontally communicated, and the connecting component can slide along the supporting rod and the connecting rod through the first through hole; the limiting assembly is in threaded connection with the connecting assembly, and after the position of the connecting assembly is determined, the limiting assembly is screwed to realize limiting and fixing of the connecting assembly; a third through hole with the same size as the second through hole is formed in the clamping assembly, and the clamping assembly is connected with the connecting assembly through a locking bolt; can adjust the angle of bracing piece and connecting rod through using universal joint, prevent that the unable condition of healing of fracture department from appearing in the patient, can prevent the angulation deformity through adjusting bracing piece and connecting rod in addition.
Furthermore, be provided with the draw-in groove on the joint subassembly, pass through draw-in groove and universal joint with auxiliary rod and connecting rod and be connected fixedly, realize rotating the adjustment that the joint subassembly drove both angles.
Furthermore, the diameter of the first through hole formed in the first universal joint connecting component and the diameter of the second through hole formed in the second universal joint connecting component are smaller than the diameter of the first through hole formed in the third universal joint connecting component and the diameter of the first through hole formed in the fourth universal joint connecting component, and the diameter of the first through hole formed in the first universal joint connecting component and the diameter of the second through hole formed in the second universal joint connecting component are the same as the outer diameters of the first connecting rod and the second connecting rod.
The using method comprises the following steps: placing the fixing ring at the metaphysis of the patient, connecting the support rod and the fixing ring by using the first connecting rod and the first universal joint, and fixing by using a locking nut; the length of the supporting rod is adjusted through the adjusting structure, so that the supporting rod is the most suitable for the length of the shank of the patient and is locked; the auxiliary rod is fixed by the connecting rod II, the universal joint II and the universal joint III, and the soft tissues of the crus cannot be damaged by the pre-bending radian of the auxiliary rod; a stable tripod is formed between the supporting rod and the auxiliary rod, and fine adjustment and pressurization of the post-operation fixed angle are realized through a universal joint.
The invention has the beneficial effects that: the fixing ring is provided with the sliding structure, so that the supporting rod and the auxiliary rod can be fixed through the sliding structure and then adjusted in position; the fixed angle is adjusted by arranging a universal joint; the pressure of the fixed angle is realized when the supporting rod is shortened by arranging the adjusting structure in the supporting rod; the auxiliary rod with the pre-bending radian can prevent the auxiliary rod from damaging the lower leg of the patient in the fixing process.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic front view of the overall structure of the present invention;
FIG. 3 is a schematic view of a retainer ring according to the present invention;
FIG. 4 is a schematic view of the universal joint of the present invention showing the auxiliary rod for three connections;
FIG. 5 is a schematic view of a connecting rod of the present invention;
FIG. 6 is a schematic view of a support bar according to the present invention;
FIG. 7 is a cross-sectional view of a support bar according to the present invention;
FIG. 8 is a schematic cross-sectional view of a second support bar of the present invention;
FIG. 9 is a rear side schematic view of the overall construction of the present invention;
FIG. 10 is a schematic view of an adjustment mechanism of the present invention;
FIG. 11 is a schematic view of the universal joint of the present invention;
in the figure, 1, a fixed ring; 11. a sliding groove; 12. a fixing plate; 13. a first connecting rod; 14. a second connecting rod; 15. locking the nut; 2. a first supporting rod; 21. the first accommodating cavity 22 and the first threaded section; 23. a second supporting rod; 24. a second accommodating cavity; 25. a second thread section; 26. adjusting the rotating shaft; 261. a third thread section; 27. a length adjusting rod; 3. an adjustment assembly; 31. a cam deflector rod; 32. a limiting bulge; 33. a limiting groove; 4. a first universal joint; 41. a universal joint II; 411. a connecting assembly; 412. a clamping assembly; 413. a limiting component; 414. locking the bolt; 42. a universal joint III; 43. a universal joint IV; 5. a first auxiliary rod; 51. and a second auxiliary rod.
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
Referring to fig. 1 to 11, an external tibiofibula fixation instrument includes a fixing ring 1 for fixing to the metaphysis of a patient, a support rod connected to the fixing ring 1, an auxiliary rod maintaining a fixed angle, and a universal joint fixing the auxiliary rod; the fixing ring 1 is provided with a sliding structure capable of adjusting a fixing angle after operation; a first connecting rod 13 is arranged in the sliding structure, and a first universal joint 4 is arranged on the first connecting rod 13; the supporting rod is connected with a first connecting rod 13 through a first universal joint 4; an adjusting structure capable of adjusting the length of the supporting rod and locking the supporting rod after adjustment is arranged in the supporting rod, and two ends of the auxiliary rod are respectively connected with the fixing ring 1 and the supporting rod through a universal joint II 41; the auxiliary rod is provided with a pre-bent radian, so that the auxiliary rod can be effectively prevented from injuring soft tissues of lower limbs of a patient when in use, and the supporting rod and the auxiliary rod can be fixed and then adjusted in position through the sliding structure by arranging the sliding structure on the fixing ring 1; the fixed angle is adjusted by arranging a universal joint; through set up regulation structure in the bracing piece, realize when the bracing piece shortens to the pressurization of fixed angle.
Example 2
Referring to fig. 1 to 3, a fixing ring 1 is provided on the basis of embodiment 1, and a sliding structure provided on the fixing ring 1 includes a sliding groove 11 provided on the fixing ring 1; the sliding groove 11 is consistent with the shape of the fixing ring 1, the fixing plate 12 is arranged in the sliding groove 11, and the flexible adjustment of the position of the supporting rod and the size of the angle between the connecting rod and the auxiliary rod can be realized through the sliding groove 11.
The fixing ring 1 is U-shaped or C-shaped, and the arrangement can enable the inner side of the fixing ring 1 to better conform to the radian of the lower leg of a human body.
Example 3
Referring to fig. 3, a support rod is arranged on the basis of embodiment 2, the first connecting rod 13 is a threaded rod and is arranged in the sliding groove 11, and the first end and the second end of the first connecting rod 13 are provided with locking nuts 15; the first connecting rod 13 is fixed by screwing the locking nut 15; when the locking nut 15 does not lock the position of the first connecting rod 13, the first connecting rod 13 can move and adjust along the groove wall of the sliding groove 11.
The fixing ring 1 is connected with the supporting rod through a universal joint arranged on a connecting rod I13; the universal joint can carry out spacing fixed to the bracing piece, can adjust the setting to the tight angle of clamp of bracing piece through universal joint.
The bracing piece includes: a first support rod 2 and a second support rod 23; the first supporting rod 2 is internally provided with a first accommodating cavity for accommodating a second supporting rod 23, the first end of the first supporting rod 2 is connected with the fixing ring 1, the second end of the first supporting rod 2 is connected with the second supporting rod 23, the first end of the second supporting rod 23 is provided with an anti-falling interlayer, and the second supporting rod 23 is prevented from being separated from the first supporting rod 2.
Example 4
Referring to fig. 2 to 10, an adjustment structure is provided on the basis of embodiment 1, the adjustment structure including: the adjusting component 3, the cam deflector rod 31 and the fixed pressing block; a limiting bulge 32 is arranged in the accommodating cavity of the first supporting rod 2, and a limiting groove 33 is arranged on the outer wall of the second supporting rod 23; an open slot communicated with the first support rod 2 is formed in the adjusting component 3; a connecting hole is arranged in the open slot; connecting shafts are arranged on two sides of the cam deflector rod 31 and connected with the connecting holes, and the cam deflector rod 31 rotates through the connecting shafts; the fixed pressing block is arranged below the cam deflector rod 31, and the fixed pressing block cannot displace when the second support rod 23 is separated from the first support rod 2; when the cam deflector rod 31 is perpendicular to the first support rod 2 or the second support rod 23, the second support rod 23 can be pulled out of the first support rod 2 in a release state; when the cam deflector rod 31 is tangent to the first support rod 2, the adjusting structure is in a locking state, and the second support rod 23 cannot move; this setting can be regulated and control the whole length of bracing piece, can pressurize fixed angle when shortening the whole length of bracing piece simultaneously.
Alternatively, the adjustment structure comprises: a length adjusting rod 27 and an adjusting rotating shaft 26; a first accommodating cavity is formed in the first supporting rod 2, and a first threaded section is formed in the first accommodating cavity; a second accommodating cavity 24 is formed in the second support rod 23, and a second threaded section 25 is formed in the second accommodating cavity 24; the adjusting rotating shaft 26 is arranged at the second end of the first supporting rod 2; the inner wall of the adjusting rotating shaft 26 is provided with a thread section three 261; the first support rod 2 and the second support rod 23 are connected through a length adjusting rod 27, a first end of the length adjusting rod 27 extends into the first accommodating cavity, and a second end of the length adjusting rod 27 extends into the second accommodating cavity 24; the length of the support rod is extended by rotating the adjusting rotating shaft 26 clockwise or anticlockwise to enable the length adjusting rod 27 to extend out of the accommodating cavity I arranged on the support rod I2.
Example 5
Referring to fig. 1 to 3, an auxiliary rod is provided on the basis of embodiment 4, a first end and a second end of a fixing ring 1 are respectively provided with a second connecting rod 14 and fixed by a lock nut 15, the second connecting rod 14 is provided with a second universal joint 41, the second end of a second supporting rod 23 is provided with a third universal joint, the first end of the auxiliary rod is connected with the second universal joint 41, the second end of the auxiliary rod is connected with the third universal joint 42, and the auxiliary rod is fixed and adjusted by the second universal joint 41 and the third universal joint; the stability of fixed back angle has been improved through setting up the auxiliary rod, and what can be better carries out fixed stay to the bracing piece.
The auxiliary rod is divided into an auxiliary rod I5 and an auxiliary rod II 51, and is respectively connected with the universal joints II 41 and the universal joints III 42 on the two connecting rods II 14; and the auxiliary rod I5 and the auxiliary rod II 51 have pre-bending radians, the pre-bending radians can bypass the muscular tissues from the outer side and form a stable tripod with the support rod, so that the support strength is enhanced, and the soft tissues of the legs are prevented from being stimulated.
Example 6
Referring to fig. 1, 2, 9 and 11, a universal joint is arranged on the basis of embodiment 1, a universal joint four 43 is further arranged on the first support rod 2, and a fixing needle for fixing a fracture part is mounted on the universal joint four 43.
The universal joint I4, the universal joint II 41, the universal joint III 42 and the universal joint IV 43 have the same structure and respectively comprise a connecting component 411, a clamping component 412, a limiting component 413 and a locking bolt 414; a first through hole and a second through hole which are longitudinally and horizontally communicated are formed in the connecting component 411, and the connecting component 411 can slide along the supporting rod and the connecting rod through the first through hole; the limiting component 413 is in threaded connection with the connecting component 411, and after the position of the connecting component 411 is determined, the limiting component 413 is screwed to limit and fix the connecting component 411; a third through hole with the same size as the second through hole is formed in the clamping assembly 412, and the clamping assembly is connected with the connecting assembly 411 through a locking bolt 414; can adjust the angle of bracing piece and connecting rod through using universal joint, prevent that the unable condition of healing of fracture department from appearing in the patient, can prevent the angulation deformity through adjusting bracing piece and connecting rod in addition.
The clamping assembly 412 is provided with a clamping groove, the auxiliary rod and the connecting rod are fixedly connected with the universal joint through the clamping groove, and the clamping assembly 412 is rotated to drive the angle adjustment of the auxiliary rod and the universal joint.
The diameter of a through hole I arranged on the connecting component 411 of the first universal joint 4 and the second universal joint 41 is smaller than that of a through hole I arranged on the connecting component 411 of the third universal joint 42 and the fourth universal joint 43, and the diameter of the through hole I arranged on the connecting component 411 of the first universal joint 4 and the second universal joint 41 is the same as the outer diameters of the first connecting rod 13 and the second connecting rod 14.
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 (10)
1. The tibiofibula external fixator comprises a fixing ring for fixing at the metaphysis of a patient, a supporting rod connected with the fixing ring, an auxiliary rod for keeping a fixed angle, and a universal joint for fixing the auxiliary rod; the fixing ring is characterized in that a sliding structure capable of adjusting a fixing angle after operation is arranged on the fixing ring; a first connecting rod is arranged in the sliding structure, and a first universal joint is arranged on the first connecting rod; the supporting rod is connected with the first connecting rod through a first universal joint; set up the regulation structure that can adjust the bracing piece length and adjust back locking in the bracing piece, the both ends of auxiliary rod are connected solid fixed ring and bracing piece through universal joint two respectively.
2. The external tibiofibular fixation instrument of claim 1, wherein the sliding structure provided on the securing ring includes a sliding groove provided on the securing ring; the sliding groove is consistent with the shape of the fixing ring, and a fixing plate is arranged in the sliding groove; the fixing ring is U-shaped or C-shaped.
3. The external tibiofibular fixation instrument of claim 2, wherein said first connecting rod is a threaded rod and disposed in the sliding channel, and a first end and a second end of the connecting rod are provided with locking nuts.
4. The external tibiofibular fixation instrument of claim 3, wherein said fixation ring is connected to the support rod by a universal joint provided on the first connecting rod.
5. The tibiofibular external fixation instrument of claim 4, wherein said support bar comprises: the first support rod and the second support rod; the first support rod is internally provided with a first accommodating cavity for accommodating a second support rod, the first end of the first support rod is connected with the fixing ring, the second end of the first support rod is connected with the second support rod, and the first end of the second support rod is provided with an anti-falling interlayer; the adjusting structure is arranged at the second end of the first supporting rod.
6. The tibiofibular external fixation instrument of claim 1, wherein said adjustment structure comprises: the adjusting component, the cam deflector rod and the fixed pressing block are arranged on the cam deflector rod; a limiting bulge is arranged in the accommodating cavity of the first supporting rod, and a limiting groove is arranged on the outer wall of the second supporting rod; an open slot communicated with the first supporting rod is arranged on the adjusting component; a connecting hole is arranged in the open slot; connecting shafts are arranged on two sides of the cam deflector rod and connected with the connecting holes, and the cam deflector rod rotates through the connecting shafts; the fixed pressing block is arranged below the cam shifting lever.
7. The tibiofibular external fixation instrument of claim 1, wherein said adjustment structure comprises: a length adjusting rod and an adjusting rotating shaft; a first accommodating cavity is formed in the first supporting rod, and a first threaded section is formed in the first accommodating cavity; a second accommodating cavity is formed in the second supporting rod, and a second threaded section is formed in the second accommodating cavity; the adjusting rotating shaft is arranged at the second end of the first supporting rod; a third threaded section is arranged on the inner wall of the adjusting rotating shaft; the first support rod is connected with the second support rod through the length adjusting rod, the first end of the length adjusting rod extends into the first accommodating cavity, and the second end of the length adjusting rod extends into the second accommodating cavity.
8. The tibiofibula external fixation instrument as claimed in claim 1, wherein the first end and the second end of the fixing ring are respectively provided with a second connecting rod, and are fixed by a locking nut, the second connecting rod is provided with a second universal joint, the second end of the second supporting rod is provided with a third universal joint, the first end of the auxiliary rod is connected with the second universal joint, and the second end of the auxiliary rod is connected with the third universal joint.
9. The tibiofibula external fixation instrument as recited in claim 8, wherein said auxiliary rod is divided into a first auxiliary rod and a second auxiliary rod, and is connected to a second universal joint and a third universal joint on the second two connecting rods; and the first auxiliary rod and the second auxiliary rod are provided with pre-bending radians.
10. The external tibiofibula fixation instrument as claimed in any one of claims 1-9, wherein the first support rod is further provided with a four-way joint; the universal joint I, the universal joint II, the universal joint III and the universal joint IV have the same structure and respectively comprise a connecting assembly, a clamping assembly, a limiting assembly and a locking bolt; the connecting component is provided with a first through hole and a second through hole which are longitudinally and horizontally communicated, and the connecting component can slide along the supporting rod and the connecting rod through the first through hole; the limiting assembly is in threaded connection with the connecting assembly, and after the position of the connecting assembly is determined, the limiting assembly is screwed to realize limiting and fixing of the connecting assembly; a third through hole with the same size as the second through hole is formed in the clamping assembly; a clamping groove is formed in the clamping component; the diameter of the first through hole formed in the first universal joint connecting assembly and the diameter of the second through hole formed in the second universal joint connecting assembly are smaller than the diameter of the first through hole formed in the third universal joint connecting assembly and the diameter of the first through hole formed in the fourth universal joint connecting assembly, and the diameter of the first through hole formed in the first universal joint connecting assembly and the diameter of the second through hole formed in the second universal joint connecting assembly are the same as the outer diameters of the first connecting rod and the second connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111498885.9A CN113974805A (en) | 2021-12-09 | 2021-12-09 | External fixator for tibiofibula |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111498885.9A CN113974805A (en) | 2021-12-09 | 2021-12-09 | External fixator for tibiofibula |
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| CN113974805A true CN113974805A (en) | 2022-01-28 |
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| CN202111498885.9A Pending CN113974805A (en) | 2021-12-09 | 2021-12-09 | External fixator for tibiofibula |
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