pedicle cutter
A truncator and pedicle technology, applied in anatomical instruments, medical science, surgery, etc., can solve problems such as narrow width space, axial or radial vibration of the tool, and low efficiency, so as to improve surgical efficiency and reduce injuries , the effect of simple structure
Active Publication Date: 2019-08-16
SECOND AFFILIATED HOSPITAL SECOND MILITARY MEDICAL UNIV
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
Among them, the amputation of the pedicle lacks corresponding instruments. In the past, the wire saw was often used to cut the pedicle directly. The sharp increase in cutting resistance makes it difficult for the doctor to move the wire saw, and the wire saw is easy to get stuck in the pedicle, resulting in increased operation time and difficulty
There is also a method of sawing off the pedicle with a pedicle saw blade, but the existing technology has the disadvantage of insufficient stability. During the operation, the blade is prone to vibrating in the axial or radial direction, and a little carelessness will injure the pedicle. The nerve and blood vessel tissue around the pedicle cannot be adjusted according to the elliptical cross-sectional shape of the pedicle, which will greatly damage the lateral cortex of the pedicle; in addition, only one knife can be used at a time during the operation, which is inefficient
Method used
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[0039] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0040] In this embodiment, the pedicle cutter provided by the present invention includes a cutter, a sleeve and a pushing rod. The push rod is nestedly connected with the casing, and the push rod can slide in the casing along the axial direction of the casing. There are grooves in the push rod, at least one bottom surface of the groove is an inclined plane relative to the axial direction of the sleeve, and the distal end along the axial direction of the sleeve extends to the outer wall of the push...
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The invention provides a vertebral pedicle chopper comprising a cutter, a casing pipe and a pushing rod. The pushing rod is nested to the casing pipe; the pushing rod in the casing pipe can axially slide along the casing pipe and can drive the cutter to extend out of thecasing pipe; and the casing pipe and / or the pushing rod can drive the cutter to synchronously rotate in a circumferential direction. The telescopic length of the cutter can be adjusted when the pushing rod is pushed in and out; the cutter can be prevented from cutting other tissues of a body before sent to an operation part, and cutting length can be adjusted according to a shape of the cross section of the vertebral pedicle; and damage to the vertebral pedicle surface cortex can be reduced.
Description
technical field [0001] The invention relates to a medical surgical instrument, in particular to a pedicle cutter, especially a surgical cutting device for pedicle cutoff. Background technique [0002] The pedicle is a part of the vertebral arch. It starts from the posterior upper part of the vertebral body. It is short and thick. It protrudes backward perpendicular to the direction of the vertebral body. It is fused with the vertebral body, articular processes and lamina. The pedicle is the composition of the intervertebral foramen. There is a shallow notch above it that forms the lower wall of the intervertebral foramen, and a deep inferior notch below the pedicle forms the upper wall of the intervertebral foramen. For the surgical treatment of spinal tumors, intracapsular resection or tumor curettage is often performed, but recurrence usually occurs early after surgery. In order to maximize the local cure rate of spinal tumors and the survival rate of patients, it involve...
Claims
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IPC IPC(8): A61B17/16A61B17/56A61B17/3209
CPCA61B17/1657A61B17/1671A61B17/3209A61B2017/564
Inventor肖建如刘铁龙许炜刘伟波汪洋刘永刚王静曹佳实白广建
OwnerSECOND AFFILIATED HOSPITAL SECOND MILITARY MEDICAL UNIV