A new type of lumbar spondylolisthesis fixation and adjustable angle connecting rod

A connecting rod and angle-adjusting technology, which is applied in the field of medical devices, can solve the problems of difficulty in adapting to different types of bones, difficulty in controlling the bending angle, and inconvenient clinical use, so as to reduce sacrospinalis muscle damage, prevent vertebral body slippage, and achieve good results. The effect of curative effect

Active Publication Date: 2019-03-01
无锡市闻泰百得医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2013, the applicant reported 21 cases of single-level universal pedicle screws combined with "V"-shaped rods in the treatment of lumbar spondylolisthesis, and achieved good results. The connecting rods used in the original package were used. It is formed by bending with a special rod bender in the operation. In addition to the need for special tools, the bending angle is difficult to control and often requires multiple adjustments, which affects the efficiency of the operation. The connecting rods in the pedicle screw-rod fixation system are difficult to adapt to different types of bones, causing great inconvenience in clinical use

Method used

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  • A new type of lumbar spondylolisthesis fixation and adjustable angle connecting rod
  • A new type of lumbar spondylolisthesis fixation and adjustable angle connecting rod
  • A new type of lumbar spondylolisthesis fixation and adjustable angle connecting rod

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Embodiment 1

[0031] like figure 1 As shown, this embodiment provides a lumbar spondylolisthesis fixation adjustable angle connecting rod, including a first rod body 1 and a second rod body 2, the first rod body 1 and the second rod body 2 Connected into a V-shaped structure, and the V-shaped structure is set as a V-shaped structure with an adjustable angle.

[0032] The first rod body 1 includes a first end 11 and a second end 12 connected by a rod, the second rod 2 includes a first end 21 and a second end 22 connected by a rod, The second end portion 12 of the first rod body 1 and the second end portion 22 of the second rod body 2 are movably connected, so that the first rod body 1 and the second rod body 2 are connected at an angle Adjustable V-shaped structure.

[0033] In this embodiment, as figure 1 As shown, the second end portion 12 of the first rod body 1 is a ball joint, and the second end portion 22 of the second rod body 2 is connected to the second end portion 12 of the firs...

Embodiment 2

[0035] like figure 2As shown, the basic structure of a lumbar spondylolisthesis fixed and adjustable angle connecting rod of this embodiment is the same as that of Embodiment 1, except that the second end 22 of the second rod body 2 includes a limiting mechanism , the limiting mechanism is configured to limit the movement of the first rod body 1 relative to the second rod body 2 . In this embodiment, the limiting mechanism includes a threaded hole 221 provided on the second end 22 of the second rod body 2 and a screw 222 matched with the threaded hole 221 . The threaded hole 221 is disposed on the end face of the second end portion 22 and on the side wall of the through hole 223 . The threaded hole 221 has an inner thread, the screw 22 includes a screw rod 2221 with an external thread and an enlarged bottom end 2222, the diameter of the bottom end 2222 is larger than the diameter of the screw rod 2221, and the bottom end is just The concave spherical surface matched with th...

Embodiment 3

[0038] like image 3 As shown, the basic structure of a lumbar spondylolisthesis fixed and adjustable angle connecting rod of the present embodiment is the same as that of the first embodiment, the difference is that the joint with the concave spherical surface of the second rod body 2 is a joint with an inner concave spherical surface. For the through hole 223 of the concave spherical surface, the maximum inner diameter of the inner concave spherical surface is in the middle of the through hole 223, that is, the inner diameter of the two ends of the through hole 223 is smaller than the inner diameter of the middle of the through hole 223, and the inner diameter of the through hole 223 is from The two ends gradually become larger toward the middle, so that the through hole forms a concave spherical surface.

[0039] The ball joint of the second end 12 of the first rod body 1 is provided with a gap notch 121 along the axial direction of the rod body 1 , and the gap notch 121 di...

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Abstract

The invention discloses a novel lumbar vertebra arch spondylolysis fixed connecting rod with the angles adjustable. The novel lumbar vertebra arch spondylolysis fixed connecting rod with the angles adjustable includes a first rod body and a second rod body, wherein the first rod body is connected with the second rod body to form a V shape structure, the angle of the V shape structure is set to be adjustable. When the novel lumbar vertebra arch spondylolysis fixed connecting rod with the angles adjustable is in use, the first rod body and the second rod body are fixed on a pedicle screw, upward resetting forces can be generated through the lifting and pulling effects of the pedicle screw on the connecting rod with angles adjustable, so that the vertebral body isthmus is firmly fixed to prevent spondylolisthesis and restore the spinal stability. The novel lumbar vertebra arch spondylolysis fixed connecting rod with the angles adjustable can conveniently adjust the angle between the first rod body and the second rod body during the operation, so the connecting rod can be adapted to various types of bones, the treatment of lumbar vertebra arch spondylolysis is greatly facilitated, and the good treatment effect is achieved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a lumbar spondylolisthesis fixation adjustable angle connecting rod. Background technique [0002] Lumbar spondylolisthesis refers to the rupture of the lumbar vertebral arch at the narrowest point between the upper and lower articular processes, that is, the isthmus. The incidence rate of the general population is 4% to 6%. It is more common in athletes, and the 5th lumbar segment is prevalent, accounting for 82% to 90%. %, followed by the waist 4, and the lower the incidence rate of the upper vertebral segment. Lumbar spondylolysis is more common in adolescents and is less common in women than in men. Some patients with spondylolisthesis are asymptomatic and are only diagnosed on occasional physical examinations. Another part of symptomatic lumbar spondylolysis is the most common complaint of low back pain, sometimes accompanied by lower extremity radiating pain. [0003] Conse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/70A61B17/86
CPCA61B17/7002A61B17/7011A61B17/7074A61B17/862A61B17/8625A61B2017/564
Inventor 陈雄生周盛源
Owner 无锡市闻泰百得医疗器械有限公司
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