Cervical Vertebrectomy Guidance for Precise Bone Removal
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Solution Overview
Problem
Current surgical methods for anterior cervical partial vertebrectomy lack effective guidance mechanisms, leading to excessive bone, endplate, and intervertebral disc removal, increased surgical time, and risk to patients due to indirect bone removal techniques.
Innovation Solution
A guidance method and apparatus that provides precise preoperative planning and direct guidance for bone removal instruments during anterior cervical partial vertebrectomy, using a physical guidance device to minimize excess bone removal and facilitate accurate placement of vertebral body replacement devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If indirect bone removal techniques are used without guidance mechanisms, then surgeons have flexibility in instrument selection, but excessive bone, endplate, and intervertebral disc removal occurs
Solution Approach 1:
The patent introduces a guidance device as an intermediary tool that physically guides the bone removal instrument along a predetermined trajectory. The guidance device includes a guide body with a trajectory channel that directs the instrument path, ensuring precise bone removal while preventing excessive removal of bone, endplate, and intervertebral disc tissues.
Solution Approach 2:
The patent implements preoperative planning where the removal trajectory is determined before surgery using imaging data. The guidance device is configured based on this preliminary plan, allowing the surgeon to execute precise bone removal following the pre-determined path without needing to manually navigate during the procedure.
2Productivity
If standard indirect bone removal methods are used, then multiple instruments may be used for bone removal, but surgical time increases
Solution Approach 1:
The guidance device serves as a mediator that consolidates the bone removal process into a single guided trajectory, eliminating the need to switch between multiple instruments and techniques. This streamlines the procedure and reduces surgical time while maintaining effective bone removal.
Solution Approach 2:
The patent changes the approach parameter from indirect multi-instrument bone removal to direct single-trajectory guided removal. By modifying the removal path to follow a predetermined trajectory through the guidance device, the surgical process becomes more efficient and time-effective.
3Reliability
If standard vertebrectomy procedures are performed, then adequate bone removal can be achieved, but patient safety is compromised due to excessive tissue removal
Solution Approach 1:
The guidance device acts as a protective intermediary that physically constrains the bone removal instrument within safe boundaries. The trajectory channel of the guide body prevents the instrument from deviating into areas that would cause excessive removal of bone, endplate, or intervertebral disc, thereby enhancing patient safety.
Solution Approach 2:
The guidance device provides continuous physical feedback to the surgeon by maintaining the instrument within the predetermined safe trajectory. The guide body structure gives tactile feedback that prevents over-removal of tissue, ensuring the surgeon stays within the boundaries of the planned resection.
Data Source
AI summary
A method of providing a guidance device for guiding a bone removal instrument for the removal of bone from a cervical vertebra and providing a vertebral body replacement device for placement into a void in a cervical spine between two endplates of a single vertebra during the course of an anterior spinal surgical procedure upon the cervical spine wherein the vertebral body replacement device has been given a PLR product code from the Food and Drug Administration (FDA).