Device for the surgical correction and fixation of the spine

 

(57) Abstract:

Usage: the invention relates to medicine, namely to traumatology and orthopedics, and is intended for the surgical treatment of patients with injuries and diseases of the spine. The invention solves the problem of providing a reliable and simple stabilization of the damaged spine in the corrected position. The inventive device for the surgical correction and fixation of the spine contains elements for attachment to bone structures, made in the form of hooks with hooks and fixed on them tightening elements, the elastic elements are in the form of threads with loops at the ends of interacting with the gripper hooks, this thread is repeatedly wrapped around the grips. 2 Il.

The invention relates to medicine, namely to traumatology and orthopedics, and is intended for the surgical treatment of patients with injuries and diseases of the spine, such as a compression fracture of the vertebral bodies, disease Chairman Mau, disease Guntra, kyphoscoliosis, when you need a hard contraction of the back bone structures damaged spine, i.e. to prevent it from bending.

the STI in the form of plates with screws through the head of the metal wire, to the elements of tension and fixation of the cable [1]

The complexity of the design with the large number of parts makes the procedure as when installing and removing it long and traumatic, with possible complications in the form of paresis and paralysis.

It is also known a device for the surgical correction and fixation of the spine, containing the elements of the attachment to bone structures, made in the form of hooks with latches, and fixed on them tightening elements in the form of compression springs.

The elasticity of the spring does not guarantee rigid stabilization of the damaged spine.

The objective of the invention to stabilize the damaged finish of the spine in the corrected position.

The problem is solved in that the device for the surgical correction and fixation of the spine, containing the elements of the attachment to bone structures, made in the form of hooks with hooks and fixed on them tightening elements, the elastic elements are in the form of threads with loops at the ends of interacting with the gripper hooks, this thread is repeatedly wrapped around zahvatuvaet hard to stabilize a damaged spine in the corrected position adequate tension of the yarn, this bending of the spine becomes impossible due to derestimate repeatedly twisted yarn, and is necessary for spinal certain degree of extension due to the possibility of weakening the threads.

By pulling the free end of the thread, repeatedly wrapped around the grips hooks, efforts tightening skyrocket on the principle of variable geometry mechanism. When this occurs, the correction of spinal deformity. The device can be applied in different sets. When kyphoscoliosis use 2 hook installed with the concave side of the spine on the transitional vertebrae of the arc of curvature, when the fracture of the vertebral body 4 hook, mounted in pairs on one or two vertebrae above and below the adjacent damaged.

In Fig.1 shows a General view of the device for the correction of a deviated vertebra with two hooks; Fig.2 installing the device on the spine of the fractured vertebral body with 4 hooks.

Device for the surgical correction and fixation of the spine (Fig. 1) contains elements for fastening to a bone in the form of hooks 1 and 2 hooks 3. The thread 4 is repeatedly wrapped around the grips 3 and fixed on them available at its ends by hinges 5 and 6. When Perello 8. Thread 4 can be made of nylon, Dacron, silk and other materials permitted for internal use in medical practice.

The device is used as follows:

In the treatment of patients with fracture of the vertebral body, when there is a kyphotic deformity of the spine incision of soft tissue, exposing the bony structure of the vertebra. The fastening elements in the form of hooks 1, 2, 7 and 8 is slid under the rear of the supporting bone formation vertebrae (arc vertebrae, joint or transverse processes). Then loop 5 thread 4 wear on the grip 3 of the hook 1. The free end of the thread 4 loop 6 is conducted to capture the 3 hook 2, encircle it, and so consistently and repeatedly twist the hooks 3 hooks 1, 2, then hooks 7 and 8. Pulling free loop 6 thread 4, produce the contraction of the posterior bony structures of the spine, thereby corregira its deformation. Free loop 6 thread 4 after achieving the necessary correction of spinal deformity is fixed on one of the next grippers 3. As the thread 4 repeatedly wraps around the grips 3, efforts tightening skyrocket (the principle of variable geometry mechanism) that allows adequate correction of deformity of spine. The wound is sutured in layers. When re-hasretim soft tissues reveal a mounting for one of the loops 5 or 6 threads 4, remove it from the grip of the hook and carried out by extrusion with subsequent formation of a new loop on the end of the thread and mount it on the grip. The wound is sewn together in layers.

The application of this device can be used in kyphotic deformities of the spine as traumatic origin and consequences of various diseases (osteochondropathy of the vertebral bodies, kyphoscoliosis), simple Assembly and disassembly his spine with the possibility of noninvasive additional correction and achieve adequate correction and fixation of the spine in flexion, keeping his movements on the extension.

Example. Patient C. 9 L. (East.disease N 1474), entered the Institute with a diagnosis of posttraumatic kyphotic deformity of the spine with the top on Th. The angle of the kyphotic curvature of the 43o.

Was performed the surgery with the use of this device. Incision of soft tissues revealed with ThVIIIfor LIIthe back bone structure of the vertebrae. On arc ThIXand LIIright and left set the hooks. Loop yarn documented the capture hook ThIXon the right side. The free end of the thread with a loop check is>right and so consistently repeatedly (three times) all the hooks hooks. By stretching free loops made the necessary correction of spinal deformity. Free loop fixed on the grip of the hook mounted on the LIIon the left side. The wound in layers left the house taking.

Immobilization crib from., after 1 month made corset from polyamide resins.

The angle of kyphosis reduced on 22o(50% of the initial deformation). The operating loss of correction in rangecontrol 10 months after surgery was not detected.

The application of this device allows you to simply carry out the installation and dismantling of his conduct noninvasive additional adjustments, it is easy to achieve adequate tightening effort and reliable fixation of the spine in flexion while maintaining its movements are in evidence, prevent the occurrence of postoperative hematomas.

Sources of information:

1. US patent N 4041939, F 61 B 17/70, 1977.

2. Foley, M. Calonoff L. Hendrix R. M. Schafer Thoracic and lumbar spine fusion: postoperative radiologic evaluation // AJR 141. 1983. P. 376.

Device for the surgical correction and fixation of the spine, containing the elements of the attachment to bone structures, made in the form cranny in the form of threads with loops at the ends, interacting with the gripper hooks, this thread is repeatedly wrapped around the grips.

 

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