CN2032045U

CN2032045U - Spine fixing appliance

Info

Publication number: CN2032045U
Application number: CN 88204709
Authority: CN
Inventors: 李家桂; 梁志彬; 尤亮彩
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-19
Filing date: 1988-04-19
Publication date: 1989-02-08

Abstract

An inner fixing appliance for treating the spine fracture comprises a support rod, a clamping ear, hexagonal nuts and pediculus arcus vertebrae screws. The fixing appliance is especially suitable for treating instability fracture dislocation of spine following paraplegia. Because the feathers of the spine fixing appliance lie in that light weight, small size, simple structure and strong supporting force, less than three vertebral bodies to fix, the injury is small and the effusion of blood quantity is short; the operation procedure is easy, and does not need to implant bone. The operation time is short, and the spine fixing appliance is fixed in the pedicle of vertebral arch with strong and firm fixing, without the danger of unhooking and broken rod; the patient can move and walk in the early stage with increased curative effect.

Description

The spinal fixation device

This utility model belongs to the apparatus of medically treating unstability fracture dislocation of spine companion paraplegia.

Therapeutic Principle to spinal fracture is the integrity and stability that as far as possible recovers canalis spinalis.The domestic and international consistent early ambulant of emphasizing fractures of medical circle, the importance of early rehabilitative intervention is advocated the activity of getting up as early as possible under the condition with strong internal fixation assurance spinal stabilization.In the apparatus of treatment thoracolumbar and lumbar fracture and dislocation companion paraplegia, with the most use, most representative is Ha Lingdun and Lug's stick, Ha Shi is used for the treatment of fracture dislocation of spine, its operation fixed range big (5～7 vertebral bodys), and wound is big, hemorrhage many, need bone-graft fusion, the walking of under no external fixation condition, can not leaving the bed too early, simultaneously, also there are the rod that breaks off relations, breaks, malreduction or displacement again, the location mistake, separation excessively causes nervous symptoms and increases the weight of, and infects etc.The glug rod is used for the thread case of band extensive injuries of shearing dislocation and rotation displacement companion, also can be used for the flexing compression fracture; But, it lacks pull strength, can not resisting longitudinal pressure, its steel wire subsiding of vertebra that may can not prevent from along the rod iron longitudinal sliding motion to fracture, thereby, it is not suitable for separately seriously pulverizes and the compressibility spinal fracture in order to treatment burst, vertebral body, and center pillar breaks and have osteocomma to charge into the patient of canalis spinalis.

The purpose of this utility model is to provide a kind of volume little, and the otch wound is little, goes out insufficiency of blood, does not need bone grafting, and support force is strong, the treatment lumbar vertebra compression fracture holder that curative effect is high.

This spinal fixation device is made up of strut, folder ear, hexagonal (hexagon)nut and pedicle nail.

A kind of pattern (Fig. 1) of this spinal fixation device is the long 100mm of being of strut (1), there is the screw thread of diameter 5mm at its two ends, the stage casing is the garden post of diameter 4～5mm, the two ends screw thread coupling of the same strut of internal diameter whorl (1) of hexagonal (hexagon)nut (3), folder ear (2) has strut hole (5) and its aperture of screwed hole (6) to mate with strut (1) two ends and pedicle screw (4) respectively, long 45～the 50mm of pedicle screw (4), diameter of thread 4mm, the strut hole (5) on two folder ears (2) is passed at strut (1) two ends, two folder ears (2) are fixed in the two ends of strut (1) respectively by two pieces of hexagonal (hexagon)nuts (3), two pieces of pedicle screws (4) pass pedicle of vertebral arch and the vertebral body that the screw hole (6) on the folder ear (2) is fixed in patient's spinal column respectively.

The another kind of pattern (Fig. 2) of this spinal fixation device is the long 100mm of being of strut (1 '), the one end is a plus thread, the other end is a left-hand thread, the diameter of thread is 5mm, the stage casing is positive six prisms, long be the regular hexagon of 6mm, the positive left-hand thread coupling at the same respectively strut of internal diameter whorl (1 ') two ends of strut, hexagonal (hexagon)nut (3 '), pressing from both sides strut hole (5 ') on the ear (2 ') has respectively positive left-hand thread and internal diameter with strut (1 ') two ends be complementary.The aperture and the pedicle screw (4) in folder ear (2 ') screwing hole (6 ') are complementary, pedicle screw (4) length is 45～50mm, diameter of thread 4mm, strut (1 ') two ends screw in respectively in two strut holes (5 ') that press from both sides on the ears (2 '), and each presss from both sides the ear two ends that (2 ') are fixed in (1 ') to two by one piece of hexagonal (hexagon)nut (3 '), two pieces of pedicle screws (4) pass the screw hole (6 ') on the folder ear (2 ') respectively, are fixed in patient's pedicle of vertebral arch and vertebral body.

Another kind of pedicle nail of the present utility model is that the quadrangular head pedicle screw (7) shown in (Fig. 3) replaces folder ear (2 or 2 ') and pedicle screw (4), quadrangular head pedicle screw (7) length overall is 50～60mm, long 30～the 50mm of screw thread, diameter of thread 4mm, the high 14mm of quadrangular of screw (7) head, the length of quadrangular transverse section is 10mm, wide 6mm, strut hole (8) is positioned at the central authorities of quadrangular, and is complementary with strut (1 or 1 ') and hexagonal (hexagon)nut (3) or (3 ').

The strut (1 or 1 ') that the also configurable length of this spinal fixation device is 100～200mm is to satisfy the needs of many vertebral fracture treatments.

All parts of this spinal fixation device are all processed by medical stainless acid resistant steel, and the gross weight of this spinal fixation that completes a set device is generally about 70 grams.

The advantage of this spinal fixation device be in light weight, volume is little, and is simple in structure, support force strong (pullout forces of the pedicle screw of diameter 4mm is 80 newton, and the tensile force of every strut can reach 1305.4 newton).This holder is used for the treatment of unstability thoracolumbar and lumbar fracture and dislocation companion paraplegia, and it is little to have an otch, goes out insufficiency of blood, fixed range few (being no more than three vertebral bodys at most), do not need bone grafting, operation technique is easy, and operating time is short, fixation of pedicle is strong firmly, do not have and break off relations, it is dangerous not have the rod of breaking, patient's ground activity (general three weeks) down in early days, reduce nursing work load, for patients ' recovery has been created condition.Thereby improved curative effect, and shortened treatment time, alleviated patient's misery and financial burden.

This holder clinical treatment spinal fracture 12 examples, male 10 examples, women 2 examples.Operation was apart from 5～24 days injured time.22～55 years old age.Postoperative does not have infection and nerve injury.Unstable fracture 3 examples wherein, 3 weeks of operation back are movable down, and local no obvious pain is taken care of oneself.In immaturity paraplegia 3 examples, the fastest person of sensory recovery is postoperative 3 days in paraplegia 6 examples fully, exercise recovery 5～15 days, and defecation was recovered 15～30 days.Follow-up results: (3～13 months) unstability patient 3 people return to one's perfect health.Incomplete spinal cord injury person 3 people, full recovery, work and light work can do housework.2 people partly recover in 6 of complete paraplegia, and still under observation, all the other 4 people vertebral body completeness dislocations do not recover so far yet.

Fig. 1 is a spinal fixation device I type structure chart.

Fig. 2 is a spinal fixation device II type structure chart.

Fig. 3 is quadrangular head pedicle screw figure.

Use this utility model spinal fracture internal fixation operation and be holding under hard or the lumbar anesthesia and carry out.The patient ventricumbent position is the center to suffer from vertebra, back median incision.Injection " hemorrhage " before cutting, with clear both sides vertebral plate and the joint capsule of appearing of laminectomy retractor, the bore position of selected pedicle of vertebral arch, select for use the bone awl to hit an aperture, the low speed electric drill of reuse 3.2mm drill bit vertically pierces to the strictness of spinal column plane, and pedicle nail must not penetrate the cortical layer of vertebral body front.Strut (1) is aimed at the bone hole with the screw hole (6) of folder ear after tentatively being combined into one with hexagonal (hexagon)nut (3) with folder ear (2), screws in upper and lower pedicle screw (4), uses spanner turn strut hexagonal (hexagon)nut at last, struts vertebral body gradually, to desired location.Each fixes this holder of cover suffering from the vertebra both sides, to correct fracture dislocation (front and back, side rotation displacement).To paraplegia person, owing to recover the unobstructed of the normal line of force of spinal column and canalis spinalis, thus reach the purpose of decompression.Fixing complete, flushing otch, layer-by-layer suture.

Claims

1, a kind of spinal fixation device for the treatment of lumbar vertebra compression fracture, by strut, the folder ear, hexagonal (hexagon)nut and pedicle nail are formed.There is screw thread at the two ends that it is characterized in that strut (1), the stage casing is the garden post, the same strut of internal diameter whorl (1) the two ends screw thread coupling of hexagonal (hexagon)nut (3), on the folder ear (2) strut hole (5) and screw hole (6) are arranged, mate with strut (1) two ends and pedicle screw (4) respectively in its aperture, the strut hole (5) on two folder ears (2) is respectively passed at strut (1) two ends, two folder ears (2) are fixed in the two ends of strut (1) respectively by two pieces of hexagonal (hexagon)nuts (3), the nail hole (6) that two pieces of pedicle screws (4) pass respectively on the folder ear (2) is fixed on the pedicle of vertebral arch.

2, according to the described spinal fixation device of claim 1, its feature is a plus thread in an end of strut (1 '), the other end is a left-hand thread, the stage casing is positive six prisms, the positive left-hand thread coupling at the same respectively strut of the internal diameter of hexagonal (hexagon)nut (3 ') and screw thread (1 ') two ends, strut hole (5 ') on folder ear (2 ') has respectively positive left-hand thread and the internal diameter with strut (1 ') two ends be complementary, in the strut holes (5 ') on strut (1 ') two ends difference precession two folders ears (2 '), and each presss from both sides the two ends that ears (2 ') are fixed in strut (1 ') to two by one piece of hexagonal (hexagon)nut (3 '), and the screw hole (6 ') that two pieces of pedicle screws (4) pass respectively on the folder ear (2 ') is fixed in pedicle of vertebral arch.

3, according to claim 1 or 2 described spinal fixation devices, it is characterized in that the folder ear (2 or 2 ') and the pedicle screw (4) of this spinal fixation device replaced by quadrangular pedicle screw (7), strut hole (8) are positioned at the central authorities of quadrangular.

4,, it is characterized in that each parts is processed into by medical stainless acid resistant steel according to claim 1 or 2 described spinal fixation devices.