Navigation template for vertebral pedicle locating and real-time screw path monitoring and manufacturing method thereof

A real-time monitoring and navigation template technology, which is applied in the field of medical devices, can solve the problems affecting the accuracy of nailing and the inability to judge pedicle screws by itself, and achieve the effect of shortening the operation time, reducing the number of C-arm fluoroscopy, and making the operation safe and effective

Active Publication Date: 2015-09-16
SOUTHERN MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, we found in the actual application process that the diameter of the guide plate hole is roughly the same as the diameter of the screw. During the nailing process, there is a large friction between the two. Therefore, driven by the electric drill, the navigation template is easy to rotate with the screw. , especially in areas where bony landmarks are not obvious or when the navigation template is not firmly fixed to the bone surface, which greatly affects the accuracy of nailing
In addition, after the pedicle screws are driven into the pedicle with the assistance of these two navigation templates, imaging examinations such as X-ray and CT are required to judge the accuracy of the screwing, and the position of the pedicle screw inside the pedicle cannot be judged by itself.

Method used

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  • Navigation template for vertebral pedicle locating and real-time screw path monitoring and manufacturing method thereof
  • Navigation template for vertebral pedicle locating and real-time screw path monitoring and manufacturing method thereof
  • Navigation template for vertebral pedicle locating and real-time screw path monitoring and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0052] Preferred embodiment 1 of the present invention: a navigation template for assisting anterior cervical pedicle screw placement, the manufacturing method of which includes the following steps:

[0053] 1) Raw data: CT scan or MRI scan of the vertebrae in the patient's operating area before operation, and collect relevant image data to create a 3D model of the vertebrae; import the collected continuous tomographic images into the 3D reconstruction software Mimics, use the "threshold Commands such as "Segmentation" and "Region Growth" reconstruct the three-dimensional model of the vertebrae; at this stage, the CAD module in the software is used to produce cylindrical rods with a diameter of 2mm and 4mm. The diameter of the cylindrical rods can be adjusted according to specific conditions. They are used to design Subsequent related nail path observation rod 3 and the nail entry area 8 on the cone surface-attached template 1;

[0054] 2) Design the best virtual screw path: I...

Embodiment 2

[0059] Preferred embodiment 2 of the present invention: a navigation template for assisting posterior cervical pedicle screw placement, the manufacturing method of which includes the following steps:

[0060] Step 1) and step 2) are the same as the preferred embodiment 1 of the present invention;

[0061] 3) Extract the vertebral characteristic surface: extract the surface contour information of the vertebral pedicle and the posterior part of the lamina in the Geomagic reverse engineering software, and use the shell command to thicken the two characteristic surfaces to obtain the pedicle template and the lamina Rear attachment template; In addition, the posterior attachment template of the lamina needs to perform Boolean operations with a cylindrical rod with a diameter of 4mm. The diameter of the cylindrical rod can be adjusted appropriately, but it should be slightly larger than the diameter of the screw or guide pin, so as to obtain the final part with a vacancy. The templa...

Embodiment 3

[0065] Preferred embodiment three of the present invention: the navigation template for auxiliary femoral neck screw placement, its manufacturing method comprises the following steps:

[0066] Step 1) and step 2) are the same as the first preferred embodiment of the present invention. Finally, the 3D reconstruction model of the femoral neck and the best screw path were obtained;

[0067] 3) Extract the characteristic surface around the femoral screw entry point: extract the surface contour information of the femoral neck and the outer surface of the upper femur in Geomagic software, and use the shell command to thicken the two characteristic surfaces to obtain the femoral neck template and the outer surface of the femur Template; In addition, the template on the lateral surface of the femur needs to perform Boolean operations with a cylindrical rod with a diameter of 8mm. This diameter can be adjusted appropriately, but it should be slightly larger than the diameter of the scr...

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Abstract

The invention discloses a navigation template for vertebral pedicle locating and real-time screw path monitoring and a manufacturing method thereof. The navigation template comprises a vertebral surface attachment template body and an external vertebral pedicle template body, at least one connecting rod is arranged between the vertebral surface attachment template body and the external vertebral pedicle template body, a screw inlet area is arranged on the vertebral surface attachment template body, the vertebral surface attachment template body is obtained by thickening after needed surgical vertebral surface data are extracted, the external vertebral pedicle template body is obtained through a mirror image vertebral pedicle template, and the vertebral pedicle template is obtained by thickening after needed surgical vertebral pedicle surface data are extracted. The vertebral surface attachment template body is obtained by thickening after the needed surgical vertebral surface data are extracted, and therefore in the screw arrangement process, the navigation template is placed firmly. The external vertebral pedicle template body is obtained through the mirror image vertebral pedicle template, therefore, the position of a screw in the vertebral pedicle can be monitored in real time, and screw inlet accuracy is improved. The navigation template is suitable for the field of medical instruments.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a navigation template for pedicle positioning and real-time monitoring of screw paths and a manufacturing method thereof. Background technique [0002] At present, in human spinal surgery, pedicle screw internal fixation technology plays a very important role, and is considered to be the most stable spinal fixation method. This kind of fixation technology requires that the pedicle screw must travel inside the pedicle; once the pedicle is pierced, it is likely to cause serious damage, such as spinal cord and vertebral blood vessel damage, and even endanger the patient's life. Therefore, ensuring the accurate placement of pedicle screws has become the research goal of scholars. In the 1990s, the method of using computer navigation system for spinal surgery has been gradually applied to clinical practice at home and abroad. However, the operation process of this navigation system is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/90A61B17/88
CPCA61B17/88A61B2017/00526A61B2017/564A61B17/90
Inventor 付茂庆欧阳钧李鉴轶肖菊姣
Owner SOUTHERN MEDICAL UNIVERSITY
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