CN114831716B - Improved intramedullary nail internal fixation device for tibia fracture - Google Patents
Improved intramedullary nail internal fixation device for tibia fracture Download PDFInfo
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- CN114831716B CN114831716B CN202210385605.1A CN202210385605A CN114831716B CN 114831716 B CN114831716 B CN 114831716B CN 202210385605 A CN202210385605 A CN 202210385605A CN 114831716 B CN114831716 B CN 114831716B
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- intramedullary nail
- rod
- nail rod
- fixing
- installation
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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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
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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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/844—Fasteners therefor or fasteners being internal fixation devices with expandable anchors or anchors having movable parts
Abstract
The invention relates to the technical field of medical instruments, in particular to an improved intramedullary nail internal fixation device for tibial fracture, which comprises a first intramedullary nail rod and a second intramedullary nail rod, wherein first installation inner cavities are formed in the first intramedullary nail rod and the second intramedullary nail rod, the second intramedullary nail rod is connected with the first intramedullary nail rod through a thread adjusting mechanism, the thread adjusting mechanism comprises an internal thread pipe and an external thread pipe, one end of the internal thread pipe and one end of the external thread pipe are welded at the end part of the second intramedullary nail rod, and a threaded rod is sleeved at the other end of the internal thread pipe and the external thread pipe in a threaded manner. According to the invention, the thread adjusting mechanism is arranged and used for adjusting the overall length between the first intramedullary nail rod and the second intramedullary nail rod, so that the adaptability adjustment is carried out according to the tibial bone shaft length of a patient, the preparation of more intramedullary nail rods of different types by the existing medical staff is not needed, the time for preparing medical instruments in an operation is saved, the labor burden is reduced, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an improved intramedullary nail internal fixation device for tibial fracture.
Background
The intramedullary nail has unique superiority when being used for treating the lower limb backbone fracture, and the fracture end can be pressurized under the action of the gravity of a human body at an upright position, so that the defect of untight contact of the fracture end possibly existing in the fixation of the intramedullary nail is overcome. Therefore, intramedullary nails play an important role in the treatment of tibial dry fractures. There are many intramedullary nails that can be used for tibial bone fractures, such as commonly used endr nails, lottes nails, rectangular nails, and the like.
In the prior art, however, the length of the tibia backbone is different due to individual differences, the length of the intramedullary nail rod is fixed, intramedullary nail rods of different models are required to be prepared, the burden of medical staff for preparing medical instruments is increased, the existing fracture fixation nail is usually fixed in a threaded connection mode when being connected with the intramedullary nail rod, deviation can be generated between the fracture fixation nail and the intramedullary nail along with the extension of time, the connection stability between the fracture fixation nail and the intramedullary nail is reduced, and the fracture internal fixation effect is reduced.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an improved intramedullary nail internal fixation device for tibial fracture.
In order to achieve the purpose, the invention adopts the technical scheme that: the improved intramedullary nail internal fixation device for the tibial fracture is characterized by comprising a first intramedullary nail rod and a second intramedullary nail rod, wherein a first mounting inner cavity is formed in each of the first intramedullary nail rod and the second intramedullary nail rod.
Preferably, the second intramedullary nail rod is connected with the first intramedullary nail rod through a thread adjusting mechanism, the thread adjusting mechanism comprises an inner thread tube and an outer thread tube, and one end of the inner thread tube and one end of the outer thread tube are welded at the end part of the second intramedullary nail rod.
Preferably, a threaded rod is sleeved at the other end of the inner and outer threaded pipes, a second thread is formed on the inner surface of the bottom end of the first mounting inner cavity, a thread at one end of the threaded rod is mounted at the bottom end of the first mounting inner cavity, and one end of the threaded rod is welded at the end part of the first intramedullary nail rod.
Preferably, the bottom welding of first intramedullary nail pole has the second internal thread pipe, the outside of external screw thread pipe including second internal thread pipe thread cover is established, a plurality of screws have all been seted up on the surface of second intramedullary nail pole and first intramedullary nail pole, and is a plurality of the screw all communicates with first installation inner chamber.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the thread adjusting mechanism is arranged and used for adjusting the overall length between the first intramedullary nail rod and the second intramedullary nail rod, so that the adaptability adjustment is carried out according to the tibial bone backbone length of a patient, the preparation of more intramedullary nail rods of different types by the existing medical staff is not needed, the time for preparing medical instruments in an operation is saved, the labor burden is reduced, and the working efficiency is improved;
the intramedullary nail fixing device is further provided with a fracture fixing mechanism, the stud can be rotated after the fixing nail rod is installed in the screw hole of the intramedullary nail rod in a threaded manner, the stud operates the folding mechanism through the installation rod, the folding mechanism is unfolded after being stressed, one end of the stop block is convenient to move to the inside of the first installation inner cavity, and the position of the fixing nail rod is limited after one end of the stop block is contacted with the surface of the first installation inner cavity, so that the stability of the fixing nail rod in the threaded installation of the intramedullary nail rod is further improved.
Drawings
FIG. 1 is an isometric view of the improved intramedullary nail internal fixation device for tibial fractures of the present invention;
FIG. 2 is a cross-sectional view of the internal fixation device of the improved intramedullary nail for tibial fracture of the present invention;
FIG. 3 is a schematic view of a first intramedullary nail rod structure of the improved intramedullary nail for tibial fracture fixation of the present invention;
FIG. 4 is a schematic structural view of a thread adjusting mechanism of the internal fixation device for a tibia fracture modified intramedullary nail according to the present invention;
FIG. 5 is a schematic view of the connection structure of two mounting pieces and a stop block of the internal fixation device for a tibial fracture modified intramedullary nail according to the present invention;
FIG. 6 is a schematic structural view of a fracture fixation mechanism of the internal fixation device for a tibial fracture modified intramedullary nail according to the present invention;
FIG. 7 is a schematic view of the connecting structure of the stud, the mounting ring member, the fixing ring member and the movable round block of the improved intramedullary nail for tibial fracture according to the present invention;
FIG. 8 is a schematic view of the connection structure of the tension spring and the stopper of the improved intramedullary nail fixing device for tibial fracture according to the present invention;
FIG. 9 is a schematic view of the connection structure of the movable round block and the connecting rod of the internal fixation device for the improved intramedullary nail for tibial fracture according to the present invention;
fig. 10 is a structural diagram of a folding mechanism of the internal fixation device for a tibial fracture modified intramedullary nail of the present invention.
In the figure: the intramedullary nail comprises a first intramedullary nail rod 1, a fixed nail rod 2, a second intramedullary nail rod 3, a convex block 4, a first internal thread tube 5, a screw hole 6, an internal and external thread tube 7, a second internal thread tube 8, a stop block 9, a threaded rod 10, a mounting piece 11, a fixed shaft 12, a mounting circular ring piece 13, a fixed circular ring piece 14, a second mounting inner cavity 15, a movable circular block 16, an opening 17, a tension spring 18, a mounting rod 19, a first mounting shaft 20, a second mounting shaft 21, a connecting rod 22, a fixed plate 23, a first mounting inner cavity 24, a stud 25, a fixing piece 26, a rubber pad 27 and a limiting spiral tube 28.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
The improved intramedullary nail internal fixation device for the tibial fracture shown in fig. 1-10 comprises a first intramedullary nail rod 1 and a second intramedullary nail rod 3, a first installation inner cavity 24 is formed in the first intramedullary nail rod 1 and the second intramedullary nail rod 3, the second intramedullary nail rod 3 is connected with the first intramedullary nail rod 1 through a thread adjusting mechanism, the thread adjusting mechanism comprises an inner threaded pipe and an outer threaded pipe 7, one end of the inner threaded pipe and the outer threaded pipe 7 is welded at the end part of the second intramedullary nail rod 3, the other end of the inner threaded pipe and the outer threaded pipe 7 is sleeved with a threaded rod 10, a second thread is formed in the inner surface of the bottom end of the first installation inner cavity 24, one end of the threaded rod 10 is welded at the end part of the first intramedullary nail rod 1, the bottom end of the first intramedullary nail rod 1 is welded with a second inner threaded pipe 8, the threaded pipe 8 is sleeved at the outer part of the inner threaded pipe 7, a plurality of screw holes 6 are formed in the surfaces of the second intramedullary nail rod 3 and the first intramedullary nail rod 1, the plurality of screw holes 6 are communicated with the first installation inner cavity 24, a fixing plate 26 is installed inside of the first installation inner cavity 24 in a matching manner, a rubber gasket 26 is in contact with a rubber gasket 27, and the rubber gasket 27. Two screw holes 2 are respectively arranged on the first intramedullary nail rod 1 and the second intramedullary nail rod 3, and the two screw holes 2 are symmetrically arranged. The screw hole 2 on the first intramedullary nail rod 1 is obliquely arranged, and the screw hole 2 on the second intramedullary nail rod 3 is horizontally arranged. The outer surface of the inner and outer threaded pipes 7 is threaded with a limit solenoid 28, the end of which is in contact with the end of the second inner threaded pipe 8. One end of the fixed nail rod 2 is in a tip shape. When the length between the second intramedullary nail rod 3 and the first intramedullary nail rod 1 is adjusted according to the length of the tibial bone, the limit screw tube 28 is firstly rotated, the first intramedullary nail rod 1 can be rotated after the limit screw tube 28 is far away from the second internal threaded tube 8, the second thread on the first intramedullary nail rod 1 is in thread rotation on the threaded rod 10, the first intramedullary nail rod 1 drives the second internal threaded tube 8 to synchronously rotate, the second internal threaded tube 8 is in thread rotation on the outer surface of the internal and external threaded tubes 7 and is used for preliminarily rotating the moving distance of the first intramedullary nail rod 1, the threaded rod 10 moves to the limit in the second thread of the first intramedullary nail rod 1, the end part of the threaded rod 10 is in contact with the bottom of the rubber pad 27 at the moment, the friction force between the first intramedullary nail rod 1 and the threaded rod 10 is increased, the first intramedullary nail rod 1 is convenient to drive the first intramedullary nail rod 1 to synchronously rotate, so that the second internal threaded tube 8 and the threaded rod 10 respectively rotate along the outer surface and the inner surface of the internal and the internal threaded tube 7, the surface of the second internal threaded rod 8 and the threaded rod 10 are convenient to move in the internal threaded tube 7, and further the distance between the second intramedullary nail rod 3 and the first intramedullary nail 1 is adjusted. Spacing screwed pipe 28 has been used for having played spacing effect to second internal thread pipe 8, and spacing screwed pipe 28 is apart from the distance between the second internal thread pipe 8 for inject the displacement of first intramedullary nail pole 1, can also promote the stability of second internal thread pipe 8 and threaded rod 10 threaded mounting on interior outer screwed pipe 7 simultaneously, has further promoted the stability of length between second intramedullary nail pole 3 and the first intramedullary nail pole 1.
The internal parts of the screw holes 6 are respectively provided with a fracture fixing mechanism, the fracture fixing mechanism comprises a fixing nail rod 2, the outer surface of the fixing nail rod 2 is provided with a first thread, the first thread is connected with the screw holes 6 in a matching way, the internal part of the fixing nail rod 2 is provided with a second installation inner cavity 15 extending to the end part of the fixing nail rod, the surface of the second installation inner cavity 15 is provided with an opening 17, the opening 17 is positioned in a first installation inner cavity 24, the end part of the fixing nail rod 2 is provided with a first internal thread pipe 5, the internal thread of the first internal thread pipe 5 is inserted with a stud 25, one end of the stud 25 is welded with an installation circular ring piece 13, the internal part of the installation circular ring piece 13 is slidably provided with a movable circular block 16, the surface of the installation circular ring piece 13 is provided with a fixed circular ring piece 14 through a screw, the surface of the fixed circular ring piece 14 is contacted with the surface of the movable circular block 16, so that two surfaces of the movable circular block 16 respectively slide along the surfaces of the installation circular ring piece 13 and the fixed circular ring piece 14, the surface of the movable round block 16 is provided with a mounting rod 19 through screws, one end of the mounting rod 19 extends to one side of the opening 17, two surfaces of the opening 17 are provided with mounting pieces 11, a fixing shaft 12 is mounted between the side surfaces of the two mounting pieces 11 through screws, the surface of the fixing shaft 12 is movably sleeved with a stop block 9, one end of the stop block 9 is positioned at the outer side of the fixed nail rod 2, one end of the stop block 9 is contacted with the inner side surface of a first mounting inner cavity 24, a folding mechanism is arranged between the mounting rod 19 and the stop block 9 and comprises two fixing plates 23, one ends of the two fixing plates 23 are respectively mounted on the surface of the stop block 9 and the inner surface of the fixed nail rod 2 through screws, the other ends of the two fixing plates 23 are respectively provided with first mounting shafts 20 through screws, and one ends of the two first mounting shafts 20 are movably sleeved with connecting rods 22, a second mounting shaft 21 is movably arranged between one ends of the two connecting rods 22 in a penetrating mode, one end of the mounting rod 19 is movably sleeved on the surface of the second mounting shaft 21, the two connecting rods 22 are identical in length, and the center line of the second mounting shaft 21 and the center line of the fixing nail rod 2 are located on the same straight line. The top of the stop block 9 is provided with an extension spring 18 through a screw, and one end of the extension spring 18 is arranged on the inner surface of the fixing nail rod 2 through a screw. The stop 9 has a size smaller than the size of the opening 17. One end of the stud 25 is welded with a convex block 4, and the convex block 4 is cylindrical. And anti-skid grains are arranged along the arc side surface of the convex block 4. After the fixing nail rod 2 is installed in the screw hole 6 through the first threaded thread, the lug 4 is rotated to drive the stud 25 to rotate in the first internal threaded tube 5 through the internal thread, meanwhile, the end part of the stud 25 drives the installation ring piece 13 to rotate synchronously, the installation ring piece 13 drives the fixing ring piece 14 to rotate synchronously, so that the installation ring piece 13 and the fixing ring piece 14 rotate on the surface of the movable circular block 16 conveniently, when the stud 25 moves in the first internal threaded tube 5, the end part of the stud 25 pushes the movable circular block 16 to move synchronously, when the movable circular block 16 moves in the first internal threaded tube 5, the movable circular block 16 pushes the installation rod 19 to move synchronously, the installation rod 19 pushes the second installation shaft 21, the second installation shaft 21 exerts acting force on the two connecting rods 22, meanwhile, the second installation shaft 21 both rotates in the inner wall of one end of the two connecting rods 22 under the action force of the installation rod 19, one end of one connecting rod 22 pushes the first installation shaft 20, the first installation shaft 20 drives the fixing plate 23 to move synchronously after the first threaded thread is stressed, the fixing plate 23 pushes the fixing shaft 23 to move synchronously, the fixing shaft 9 is further, the fixing nail rod 2 is connected to the inner cavity of the fixing nail rod 2 through the internal thread, and the fixing shaft 25, and the fixing ring piece 24, and the fixing ring piece can be conveniently.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The improved intramedullary nail internal fixation device for the tibial fracture is characterized by comprising a first intramedullary nail rod and a second intramedullary nail rod, wherein first mounting inner cavities are formed in the first intramedullary nail rod and the second intramedullary nail rod; the second intramedullary nail rod is connected with the first intramedullary nail rod through a thread adjusting mechanism, the thread adjusting mechanism comprises an inner threaded pipe and an outer threaded pipe, one end of the inner threaded pipe and one end of the outer threaded pipe are welded at the end part of the second intramedullary nail rod, the other end of the inner threaded pipe and the outer threaded pipe are sleeved with a threaded rod, a second thread is arranged on the inner surface of the bottom end of the first installation inner cavity, one end of the threaded rod is installed at the bottom end of the first installation inner cavity in a threaded mode, one end of the threaded rod is welded at the end part of the first intramedullary nail rod, the second inner threaded pipe is welded at the bottom end of the first intramedullary nail rod and sleeved outside the inner threaded pipe in a threaded mode, a plurality of screw holes are formed in the surfaces of the second intramedullary nail rod and the first intramedullary nail rod and communicated with the first installation inner cavity, a fixing piece is installed inside the first installation inner cavity in a matched mode, a rubber pad is bonded at the bottom of the fixing piece, and the bottom of the rubber pad is contacted with the end part of the threaded rod; two screw holes are respectively arranged on the first intramedullary nail rod and the second intramedullary nail rod, and the two screw holes are symmetrically arranged; the screw hole on the first intramedullary nail rod is obliquely arranged, and the screw hole on the second intramedullary nail rod is horizontally arranged; the outer surface of the inner threaded pipe and the outer threaded pipe are sleeved with a limiting solenoid, and the end part of the limiting solenoid is contacted with the end part of the second inner threaded pipe; one end of the fixing nail rod is in a pointed shape;
the internal parts of the screw holes are respectively provided with a fracture fixing mechanism, the fracture fixing mechanism comprises a fixing nail rod, the outer surface of the fixing nail rod is provided with a first thread which is matched and connected with the screw holes, the internal part of the fixing nail rod is provided with a second installation inner cavity extending to the end part of the fixing nail rod, the surface of the second installation inner cavity is provided with an opening, the opening is positioned in the first installation inner cavity, the end part of the fixing nail rod is provided with a first internal thread pipe, the internal thread of the first internal thread pipe is inserted with a stud, one end of the stud is welded with an installation circular ring part, the internal part of the installation circular part is slidably provided with a movable circular block, the surface of the installation circular part is provided with a fixed circular ring part through a screw, the surface of the fixed circular ring part is contacted with the surface of the movable circular block, so that the two surfaces of the movable circular block respectively slide along the surfaces of the installation circular ring part and the fixed circular ring part, and the surface of the movable circular block is provided with the installation rod through a screw, one end of the mounting rod extends to one side of the opening, mounting pieces are arranged on two surfaces of the opening, a fixed shaft is arranged between the side surfaces of the two mounting pieces through a screw, a stop block is movably sleeved on the surface of the fixed shaft, one end of the stop block is positioned on the outer side of the fixed screw rod, one end of the stop block is contacted with the inner side surface of the first mounting inner cavity, a folding mechanism is arranged between the mounting rod and the stop block and comprises two fixing plates, one ends of the two fixing plates are respectively mounted on the surface of the stop block and the inner surface of the fixed screw rod through screws, first mounting shafts are respectively mounted at the other ends of the two fixing plates through screws, connecting rods are movably sleeved at one ends of the two first mounting shafts, a second mounting shaft is movably arranged between one ends of the two connecting rods, one end of the mounting rod is movably sleeved on the surface of the second mounting shaft, the lengths of the two connecting rods are identical, the central line of the second mounting shaft and the central line of the fixing nail rod are positioned on the same straight line; the top of the stop block is provided with an extension spring through a screw, and one end of the extension spring is arranged on the inner surface of the fixing nail rod through a screw; the size of the stop block is smaller than that of the opening; one end of the stud is welded with a convex block which is cylindrical; and anti-skid grains are arranged along the arc side surface of the convex block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210385605.1A CN114831716B (en) | 2022-04-13 | 2022-04-13 | Improved intramedullary nail internal fixation device for tibia fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210385605.1A CN114831716B (en) | 2022-04-13 | 2022-04-13 | Improved intramedullary nail internal fixation device for tibia fracture |
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| Publication Number | Publication Date |
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| CN114831716A CN114831716A (en) | 2022-08-02 |
| CN114831716B true CN114831716B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210385605.1A Active CN114831716B (en) | 2022-04-13 | 2022-04-13 | Improved intramedullary nail internal fixation device for tibia fracture |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5112333A (en) * | 1990-02-07 | 1992-05-12 | Fixel Irving E | Intramedullary nail |
| US6270499B1 (en) * | 1997-10-20 | 2001-08-07 | Synthes (U.S.A.) | Bone fixation device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2901991B1 (en) * | 2006-06-13 | 2021-07-09 | Arnaud Andre Soubeiran | INTRACORPAL EXTENSION DEVICE MOUNTED IN TENSILE SCREW |
| WO2010006195A1 (en) * | 2008-07-09 | 2010-01-14 | Amei Technologies, Inc. | Ankle arthrodesis nail and outrigger assembly |
| WO2013181659A1 (en) * | 2012-06-01 | 2013-12-05 | Clarkson University | Adjustable length orthopedic device |
| CN104173097A (en) * | 2014-07-21 | 2014-12-03 | 阮玉德 | Intramedullary nail |
| CN211862944U (en) * | 2019-09-16 | 2020-11-06 | 北京贝思达生物技术有限公司 | Intramedullary pin |
-
2022
- 2022-04-13 CN CN202210385605.1A patent/CN114831716B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5112333A (en) * | 1990-02-07 | 1992-05-12 | Fixel Irving E | Intramedullary nail |
| US6270499B1 (en) * | 1997-10-20 | 2001-08-07 | Synthes (U.S.A.) | Bone fixation device |
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| CN114831716A (en) | 2022-08-02 |
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