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Device convenient for positioning pedicle screw

A pedicle screw, a convenient technology, applied in the field of medical devices, can solve the problems of easily causing medical accidents, positioning devices and systems rely on navigation functions, and lack of physical depth-limiting functions, etc., to achieve reasonable structure, improve success rate, and ensure safety Effect

Active Publication Date: 2022-04-29
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing positioning devices and systems rely too much on the set navigation function and do not have a physical depth limit function. If the medical staff makes a positioning error or the machine itself fails, it may easily cause medical accidents

Method used

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  • Device convenient for positioning pedicle screw
  • Device convenient for positioning pedicle screw
  • Device convenient for positioning pedicle screw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Please refer to Figure 1-14 , a device for conveniently positioning pedicle screws in this embodiment, which includes a mechanical arm, a depth-limiting structure, a target structure 2, and a fixed clamping structure; the first end of the depth-limiting structure is fixed on the first end of the mechanical arm, and the depth-limiting structure The second end of the deep structure is movably connected to the second end of the mechanical arm; the fixed clamping structure is fixedly connected to the mechanical arm; and the target structure 2 is detachably connected to the fixed clamping structure. This setting installs the original gripping target structure 2 to the fixed clamping structure and integrates it into the robotic arm. Measure the length of the vertebral body from the nail entry point to the front edge of the vertebral body according to the planned navigation of the robotic arm. The setting is smaller than this value. The depth-limiting structure can ensure the...

Embodiment 2

[0059] Please refer to figure 1 , 9. On the basis of Embodiment 1, this embodiment adds the following technical features: (the following specific settings are made to the depth-limiting structure): the depth-limiting structure includes two sections of telescopic rods and moving rings 1 integrally connected; Ring 1 is fixedly connected.

[0060] The two sections of telescopic rods respectively include an inner rod 3 and an outer sleeve 4, the outer sleeve 4 is located on the outside of the inner rod 3 and can slide relative to the inner rod 3; Reinforcing rods are arranged between the sides, and the angle between the two inner rods 3 is between 120° and 150°, which can ensure the limit strength of the telescopic rods.

[0061] At least one threaded hole is respectively provided on the sides of the two outer sleeves 4, and suitable bolts are installed in the threaded holes; this setting ensures that when the two sections of the telescopic rods are adjusted to a suitable length,...

Embodiment 3

[0066] Please refer to Figure 1-8 , on the basis of Embodiment 1-2, this embodiment adds the following technical features (the following specific settings are made to the fixed clamping structure): the fixed clamping structure includes a clamping part and a clamping shell 7; the clamping shell 7 and the clamping part The center is provided with a channel to ensure the entry of the target structure 2; the clamping part is combined with the clamp shell 7, and the clamping part includes a plurality of clamping jaws 6 that can hold the target structure 2 tightly, and an operating structure that realizes the clamping and loosening of the clamping jaws 6 ; Drive the jaw 6 to grasp the target structure 2 by controlling the operation structure.

[0067] The clamp shell 7 is cylindrical, and the interior is a cylindrical cavity, which accommodates the operating structure and the jaws 6; this arrangement ensures the protection effect on the operating structure and the jaws 6.

[0068]...

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Abstract

The invention relates to a device for conveniently positioning a pedicle screw. The device comprises a mechanical arm, a depth limiting structure, a positioning needle and a fixed clamping structure, the first end of the depth limiting structure is fixed to the first end of the mechanical arm, and the second end of the depth limiting structure is movably connected with the second end of the mechanical arm. The fixed clamping structure is fixedly connected with the mechanical arm; the positioning needle is detachably connected with the fixed clamping structure; an arc-shaped groove is formed in the positioning needle handle; the depth limiting structure comprises two sections of telescopic rods and a movable ring which are integrally connected; according to the arrangement, an original holding type positioning needle is installed on the fixing and clamping structure and integrated on the mechanical arm, the length of the centrum from a nail entering point to the front edge of the centrum is measured according to planning navigation of the mechanical arm, and the safety of a patient can be guaranteed by arranging the depth limiting structure smaller than the length of the centrum.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a device for conveniently positioning vertebral pedicle screws. Background technique [0002] Spinal internal fixation systems can provide grip for operations such as spinal correction and help restore spinal stability, which is critical in spinal surgery. The pedicle screw device can provide a strong three-dimensional holding force, and is currently the most commonly used spinal internal fixation system, and is widely used in spinal decompression and fixation surgery and deformity correction surgery. The pedicle screws need to go through the pedicle and reach the front of the vertebral body, adjacent to important structures: there are important structures such as the spinal cord and nerve roots around the pedicle, and there are important structures such as large blood vessels on the anterolateral side of the spine. Poor performance can lead to catastroph...

Claims

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Application Information

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IPC IPC(8): A61B17/90A61B17/70A61B34/20A61B34/30A61B90/00
CPCA61B17/88A61B17/7091A61B34/20A61B34/70A61B90/06A61B2090/061A61B2034/306
Inventor 杜悠王升儒仉建国赵钇伟余伟杰李芷仪杨阳林莞锋徐薇
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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