CN111150474A - Controllable internal rod bender of orthopedic rod for posterior spinal internal fixation - Google Patents
Controllable internal rod bender of orthopedic rod for posterior spinal internal fixation Download PDFInfo
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- CN111150474A CN111150474A CN202010061397.0A CN202010061397A CN111150474A CN 111150474 A CN111150474 A CN 111150474A CN 202010061397 A CN202010061397 A CN 202010061397A CN 111150474 A CN111150474 A CN 111150474A
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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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
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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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
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- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
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- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgical Instruments (AREA)
Abstract
The utility model provides a backbone way of escape internal fixation is with internal curved excellent ware of controllability of orthopedic stick, including the horizontal pole, the screw rod, two bracing pieces, the upper end of two bracing pieces articulates respectively at the both ends of horizontal pole, two bracing pieces downwardly extending, the lower extreme of two bracing pieces all is equipped with the first opening hook groove that transversely runs through the bracing piece that is used for catching on orthopedic stick, the opening in first opening hook groove is located the bracing piece side, the horizontal pole intermediate position is equipped with a screw thread through-hole, screw rod and screw thread through-hole screw-thread fit, screw rod lower extreme axial positioning activity hinge joint coupler body, the lower extreme of coupler body is equipped with second opening hook groove, the opening in second opening hook groove is located coupler body side, the upper end circumference fixed coordination of handle and screw rod, be used for rotating the screw rod and make the screw rod realize correcting through going up.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a controllable in-vivo rod bender of an orthopedic rod for posterior spinal fixation.
Background
With the development of spinal surgery technology, the posterior approach osteotomy has become widely applied in clinic, can be used for correcting the kyphotic deformity caused by related diseases such as ankylosing spondylitis, congenital vertebral body dysplasia, old fracture, spinal tuberculosis, vertebral body tumor and the like, and can also be used for finishing the treatment of the severe kyphotic deformity. In performing a spinal osteotomy, the surgeon requires a variety of different tools to perform the various surgical procedures. In operation, according to the abnormal condition of the spine of a patient, a rod-shaped orthopedic rod is implanted into a human body, the orthopedic rod is fixed with the spine by a nail rod, and generally, one orthopedic rod is fixed on each side of the spine, so that the spine is expected to grow along the guiding direction of the orthopedic rod, and the function of correcting the spine is achieved. The bending rod is a key step in the orthopedic process, and the existing bending rod device for orthopedic use generally has two structures, one is a clamp structure, and the other is a handle structure. The rod bending device with the jaw type structure is characterized in that a jaw at the front end is adopted to clamp an orthopedic rod for rotation, and the tighter the clamping is, the heavier the clamping mark left on the orthopedic rod is; the rod bender with the handle type structure rotates the rod through the handle with the polygonal hole, and the orthopedic rod is required to be provided with a corresponding polygonal structural part. These two kinds of rod bending devices often form a bite mark on the orthopedic rod, and doctors need to use great force during the bending process, the force is not controlled well, the traction of the spinal cord is easy to cause, even the fracture of the orthopedic rod is caused by stress, the doctors still exert great force on the rod bending devices due to inertia during the fracture of the orthopedic rod, the rod bending devices collide with the spinal cord and other nerve tissues near the orthopedic rod because of sudden loss of force points, the fractured rod also easily damages the spinal cord and the nerve roots near the spinal cord because of sudden loss of control, which is quite dangerous in spinal surgery, even disastrous, can cause the damage of the spinal cord, cause the failure of the surgery, and bring irreversible damage to patients. Therefore, it is very urgent to provide an in vivo rod bender with good controllability.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a controllable in-vivo rod bender of an orthopedic rod for posterior spinal internal fixation, which can stably control the force when the orthopedic rod is bent, avoid the generation of scratches on the orthopedic rod, prevent the orthopedic rod from suddenly sliding out of the rod bender and prevent the orthopedic rod from breaking due to stress, and the technical scheme of the invention is as follows:
the controllable internal rod bender of the orthopedic rod for the posterior spinal internal fixation comprises a cross rod, a screw rod and two support rods, wherein the upper ends of the two support rods are respectively hinged at two ends of the cross rod, the two support rods extend downwards, first opening hook grooves used for hooking the orthopedic rod and transversely penetrating through the support rods are formed in the lower ends of the two support rods, the opening of each first opening hook groove is located on the side face of the corresponding support rod, a threaded through hole is formed in the middle position of the cross rod, the screw rod is in threaded fit with the threaded through hole, a hook body is movably hinged to the lower end of the screw rod in an axial positioning mode, a second opening hook groove is formed in the lower end of the hook body, the opening of the second opening hook groove is located on the side face of the hook body, and a handle is fixedly matched with the upper end of the screw rod in the circumferential direction and is.
The upper end of the screw rod is provided with a connecting hole for fixedly connecting the handle in the circumferential direction.
The connecting hole is a polygonal hole, and one end of the handle is provided with a downward extending polygonal column matched with the polygonal hole and used for being fixedly matched with the polygonal hole in the circumferential direction.
The connecting hole is a spline hole, and one end of the handle is provided with an outer spline column extending downwards and used for being fixedly matched with the spline hole in the circumferential direction.
The cross sections of the two supporting rods are rectangular, open grooves are formed in the upper ends of the supporting rods, and the end portions of the cross rods are located in the open grooves and hinged through bolts.
The first opening hook groove is a T-shaped groove, the opening width of the T-shaped groove is larger than the diameter of the orthopedic rod, and the length of the T-shaped groove in the axial direction of the orthopedic rod is 15-20 mm.
The upper end of the hook body is provided with a hole in clearance fit with the lower end of the screw rod, the lower portion of the hook body is of a rectangular cross section, the second opening hook groove is formed in the lower portion of the hook body and is a T-shaped groove, the opening width of the T-shaped groove is larger than the diameter of the orthopedic rod, and the length of the T-shaped groove in the axial direction of the orthopedic rod is 10-16 mm.
The circumference of the lower end of the screw rod is provided with an annular groove, the lower end of the screw rod is in clearance fit with a hole at the upper end of the hook body, and the lower end of the screw rod is inserted into the annular groove through a radial pin, so that the hook body shaft is movably hinged at the lower end of the screw rod in a positioning mode.
Two side walls of the bottom of the T-shaped groove are arc surfaces, and the radius of the arc surfaces is the same as that of the shape correcting rod.
The distance between the arc tops of the arc surfaces of the two side walls of the T-shaped groove is twice of the diameter of the orthopedic rod.
Adopt above-mentioned technical scheme: the upper ends of the two support rods are hinged to the two ends of the cross rod respectively, the two support rods extend downwards, first opening hook grooves which are used for hooking orthopedic rods and transversely penetrate through the support rods are formed in the lower ends of the two support rods, openings of the first opening hook grooves are located on the side faces of the support rods, a threaded through hole is formed in the middle position of the cross rod, the screw rod is in threaded fit with the threaded through hole, a hook body is movably hinged to the lower end of the screw rod in an axial positioning mode, a second opening hook groove is formed in the lower end of the hook body, the openings of the second opening hook grooves are located on the side faces of the hook body, and a handle is fixedly matched with the upper end of the screw rod in the circumferential direction and used for rotating the screw rod to enable the screw rod to. From this, drive the screw rod through pulling the handle and rotate, screw rod and the screw thread through-hole screw-thread fit on the horizontal pole realize the lift of screw rod to drive the lift of coupler body, orthopedic stick is arranged in the first opening hook groove of two bracing pieces and the second opening hook groove of coupler body, along with the lift of coupler body, orthopedic stick can be crooked to required angle. Because the first open hook grooves of the two support rods and the second open hook grooves of the hook bodies are T-shaped grooves, the orthopedic rod can be prevented from sliding out of the first open hook grooves and the second open hook grooves during bending, the operation process is stable and safe, and the situations that the spinal cord and other nervous tissues are collided and damaged due to the fact that the orthopedic rod suddenly slides out can be avoided; the lifting driven by the rotating screw rod is stable, so that the stable force can be kept in the bending process, the traction of the spinal cord is prevented, the generation of biting marks on the orthopedic rod is avoided, the fracture of the orthopedic rod caused by overlarge stress is avoided, the operation process is stable and safe, and the situations that the spinal cord and other nerve tissues are collided and damaged due to the fracture of the orthopedic rod cannot occur.
The upper end of the screw rod is provided with a connecting hole for fixedly connecting the handle in the circumferential direction. The connecting hole is a polygonal hole, one end of the handle is provided with a downward extending polygonal column matched with the polygonal hole and used for being fixedly matched with the polygonal hole in the circumferential direction, and therefore the handle can drive the screw rod to rotate.
The connecting hole is a spline hole, and one end of the handle is provided with an outer spline column extending downwards and used for being fixedly matched with the spline hole in the circumferential direction, so that the handle can drive the screw to rotate.
The cross sections of the two supporting rods are rectangular, the upper ends of the supporting rods are provided with open slots, the end portions of the cross rods are located in the open slots and are hinged through bolts, and the supporting rods are conveniently applicable to different positions and different spinal curvature degrees.
The first opening hook groove is a T-shaped groove, the opening width of the T-shaped groove is larger than the diameter of the orthopedic rod so that the orthopedic rod can pass through the T-shaped groove, and the length of the T-shaped groove in the axial direction of the orthopedic rod is 15-20 mm.
The upper end of the hook body is provided with a hole in clearance fit with the lower end of the screw rod, so that the screw rod and the hook body can rotate relatively, the lower portion of the hook body is rectangular in cross section, the second open hook groove is formed in the lower portion of the hook body, the second open hook groove is a T-shaped groove, the opening width of the T-shaped groove is larger than the diameter of the orthopedic rod, so that the orthopedic rod can pass through the T-shaped groove, and the length of the T-shaped groove in the axial direction of the orthopedic rod is 10-16 mm.
The circumference of the lower end of the screw rod is provided with an annular groove, the lower end of the screw rod is in clearance fit with a hole in the upper end of the hook body, and the screw rod is inserted into the annular groove through a radial pin, so that the hook body shaft is movably hinged to the lower end of the screw rod in a positioning mode, relative rotation can be achieved between the screw rod and the hook body, and the screw rod only drives the hook body to lift.
Two side walls of the groove bottom of the T-shaped groove are arc surfaces, and the radius of the arc surfaces is the same as that of the shape correcting rod, so that the shape correcting rod can be stably placed in the T-shaped groove.
The invention is further described with reference to the drawings and the specific embodiments in the following description.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a top view of the cross bar;
fig. 5 is a schematic view of the present invention in use.
Detailed Description
The invention discloses an embodiment of a controllable in-vivo rod bender of an orthopedic rod for posterior internal fixation of a spine, which comprises the following components in parts by weight:
referring to fig. 1-5, a controllable internal bending rod device of an orthopedic rod for posterior spinal fixation comprises a cross rod 1, a screw rod 2 and two support rods 5, wherein the upper ends of the two support rods 5 are respectively hinged to two ends of the cross rod 1, the cross sections of the two support rods 5 are rectangular, the upper end of each support rod 5 is provided with an open slot, the end part of the cross rod 1 is positioned in the open slot and is hinged through a bolt 12, and the device is conveniently applicable to different positions and different spinal bending degrees. The two support rods 5 extend downwards, the lower ends of the two support rods 5 are respectively provided with a first open hook groove 6 which is used for hooking the orthopedic rod 10 and transversely penetrates through the support rods 5, the opening of the first open hook groove 6 is positioned on the side surface of the support rods 5, the first open hook groove 6 is a T-shaped groove, the opening width of the T-shaped groove is slightly larger than the diameter of the orthopedic rod 10 so that the orthopedic rod 10 can conveniently pass through, and the length of the T-shaped groove along the axial direction of the orthopedic rod 10 is 15-20 mm. The 1 intermediate position of horizontal pole is equipped with a screw thread through-hole 11, screw rod 2 and 11 screw-thread fits of screw thread through-hole, the articulated couple body 7 of 2 lower extreme axial positioning activities of screw rod, the upper end of couple body 7 be equipped with 2 lower extreme clearance fit's of screw rod hole, 2 lower extreme circumferences of screw rod are equipped with an annular, and 2 lower extreme clearance fit of screw rod are in the hole of 7 upper ends of couple body, insert the annular through two radial round pins 8, make 7 axle positioning activities of couple body articulate at 2 lower extremes of screw rod for can have relative rotation between screw rod 2 and the couple body 7, screw rod 2 only drives the 7 lifts of couple body. The lower portion of the hook body 7 is rectangular in cross section, a second open hook groove 7a is formed in the lower end of the hook body 7, the second open hook groove 7a is formed in the lower portion of the hook body 7, the opening of the second open hook groove 7a is located on the side face of the hook body 7, the second open hook groove 7a is a T-shaped groove, the opening width of the T-shaped groove is slightly larger than the diameter of the orthopedic rod 10, so that the orthopedic rod 10 can pass through the T-shaped groove, and the length of the T-shaped groove in the axial direction of the orthopedic rod 10 is 10-16 mm. The fixed cooperation of upper end circumference of a handle 3 and screw rod 2, 2 upper ends of screw rod are equipped with a connecting hole 9 that is used for circumference fixed connection handle 3, and the connecting hole 9 of this embodiment is hexagonal hole, and is corresponding, be equipped with the hexagonal prism that coincide downwardly extending with this hexagonal hole on the handle 3 for with hexagonal hole circumference fixed cooperation, thereby make handle 3 can drive screw rod 2 rotatory, screw rod 2 and the 11 screw-thread fit of screw through-hole on the horizontal pole 1, realize the lift of screw rod 2, thereby drive the lift of couple body 7, realize correcting orthopedic stick 10 application of force. The first open hook grooves 6 of the two support rods 5 and the second open hook grooves 7a of the hook bodies 7 are both T-shaped grooves, two side walls of the groove bottom of each T-shaped groove are arc surfaces, the radius of each arc surface is the same as that of the orthopedic rod 10, and the distance L between arc tops of the arc surfaces of the two side walls of each T-shaped groove is twice or not limited to twice the diameter of the orthopedic rod 10, so that the orthopedic rod 10 can be stably placed in the first open hook groove 6 and the second open hook groove 7a, the orthopedic rod 10 can be prevented from sliding out of the first open hook groove 6 and the second open hook groove 7a during bending, the operation process is stable and safe, and the situation that spinal cords and other nervous tissues are collided and damaged due to sudden sliding out of the orthopedic rod 10 can be avoided. The lifting of the hook body 7 is driven by rotating the screw rod 2, and the lifting is stable, so that stable force can be kept in the bending process, the traction of spinal cords is prevented, the generation of biting marks on the orthopedic rod 10 is avoided, the fracture of the orthopedic rod 10 caused by overlarge stress is avoided, the operation process is stable and safe, and the situations that the spinal cords and other nerve tissues are collided and damaged due to the fracture of the orthopedic rod 10 are avoided.
When the orthopedic rod fixing device is used, firstly, an orthopedic rod 10 is pre-bent outside the body according to the deformation degree of the spine, the pre-bent orthopedic rod 10 is fixed on a pedicle screw fixed on the spine from the posterior of the spine, then, the orthopedic rod 10 is hooked by the first open hook grooves 6 of the two support rods 5 of the internal rod bender, the hexagonal prism on the handle 3 is inserted into the connecting hole 9 at the upper end of the screw rod 2 to form circumferential fixation, the handle 3 is rotated to enable the second open hook groove 7a of the hook body 7 to hook the orthopedic rod 10, after hooking, the handle 3 is rotated again to press the hook body 7 downwards, so that the orthopedic rod 10 is deformed to the degree required by orthopedic, and the two support rods 5 play a supporting role in the bending process. After the orthopedic operation is completed, the intracorporeal bending machine is moved to align the orthopedic rod 10 with the openings of the first and second open hook grooves 6 and 7a, and then the intracorporeal bending machine is moved away from the orthopedic rod 10. The invention can also be used for an external bent rod, when the external bent rod is used, the two support rods 5 are adjusted to be vertical to the cross rod 1, then the bolts are tightened, then the orthopedic rod 10 is placed in the first open hook grooves 6 of the two support rods 5 and the second open hook groove 7a of the hook body 7, and the screw rod 2 is lifted upwards through the handle 3, so that the orthopedic rod 10 can be deformed.
Claims (10)
1. The utility model provides a spinal way of escape internal fixation is with controllability internal bending stick ware of orthopedic stick which characterized in that: comprises a cross rod (1), a screw rod (2) and two support rods (5), wherein the upper ends of the two support rods (5) are respectively hinged at the two ends of the cross rod (1), the two support rods (5) extend downwards, the lower ends of the two support rods (5) are respectively provided with a first open hook groove (6) which is used for hooking an orthopedic rod (10) and transversely penetrates through the support rods (5), the opening of the first open hook groove (6) is positioned at the side surface of the support rods (5), the middle position of the cross rod (1) is provided with a threaded through hole (11), the screw rod (2) is in threaded fit with the threaded through hole (11), the lower end of the screw rod (2) is movably hinged with a hook body (7) in an axial positioning manner, the lower end of the hook body (7) is provided with a second open hook groove (7 a), the opening of the second open hook groove (7 a) is positioned at the side surface of the hook body (7), and a handle (3, the screw rod (2) is rotated to enable the screw rod (2) to apply force to the orthopedic rod (10) through lifting to realize correction.
2. A controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 1, wherein: the upper end of the screw rod (2) is provided with a connecting hole (9) for fixedly connecting the handle (3) in the circumferential direction.
3. A controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 2, wherein: the connecting hole (9) is a polygonal hole, and one end of the handle (3) is provided with a polygonal column (4) which is matched with the polygonal hole and extends downwards and is used for being fixedly matched with the polygonal hole in the circumferential direction.
4. A controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 2, wherein: the connecting hole (9) is a spline hole, and one end of the handle (3) is provided with an outer spline column extending downwards and used for being fixedly matched with the spline hole in the circumferential direction.
5. A controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 1, wherein: the cross sections of the two supporting rods (5) are rectangular, the upper ends of the supporting rods (5) are provided with open grooves, and the end portions of the cross rods (1) are located in the open grooves and hinged through bolts (12).
6. A controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 1, wherein: the first opening hook groove (6) is a T-shaped groove, the opening width of the T-shaped groove is larger than the diameter of the orthopedic rod (10), and the length of the T-shaped groove in the axial direction of the orthopedic rod (10) is 15-20 mm.
7. A controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 1, wherein: the upper end of the hook body (7) is provided with a hole in clearance fit with the lower end of the screw rod (2), the lower portion of the hook body (7) is rectangular in cross section, the second opening hook groove (7 a) is formed in the lower portion of the hook body (7), the second opening hook groove (7 a) is a T-shaped groove, the opening width of the T-shaped groove is larger than the diameter of the orthopedic rod (10), and the length of the T-shaped groove in the axial direction of the orthopedic rod (10) is 10-16 mm.
8. The controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 7, wherein: the circumference of the lower end of the screw rod (2) is provided with an annular groove, the lower end of the screw rod (2) is in clearance fit with a hole at the upper end of the hook body (7) and is inserted into the annular groove through a radial pin (8), so that the shaft of the hook body (7) is movably hinged at the lower end of the screw rod (2) in a positioning way.
9. The controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 6 or 7, wherein: two side walls of the groove bottom of the T-shaped groove are arc surfaces, and the radius of the arc surfaces is the same as that of the orthopedic rod (10).
10. The controllable intracorporeal bending rod device of an orthopedic rod for posterior spinal internal fixation according to claim 9, wherein: the distance between the arc tops of the arc surfaces of the two side walls of the T-shaped groove is twice of the diameter of the orthopedic rod (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061397.0A CN111150474A (en) | 2020-01-19 | 2020-01-19 | Controllable internal rod bender of orthopedic rod for posterior spinal internal fixation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061397.0A CN111150474A (en) | 2020-01-19 | 2020-01-19 | Controllable internal rod bender of orthopedic rod for posterior spinal internal fixation |
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| Publication Number | Publication Date |
|---|---|
| CN111150474A true CN111150474A (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010061397.0A Pending CN111150474A (en) | 2020-01-19 | 2020-01-19 | Controllable internal rod bender of orthopedic rod for posterior spinal internal fixation |
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| CN (1) | CN111150474A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111839696A (en) * | 2020-06-02 | 2020-10-30 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Accurate control type reduction device for scoliosis deformity correction |
-
2020
- 2020-01-19 CN CN202010061397.0A patent/CN111150474A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111839696A (en) * | 2020-06-02 | 2020-10-30 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Accurate control type reduction device for scoliosis deformity correction |
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