Patient-Specific Osteotomy Guide for Talus Resection
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Solution Overview
Problem
Conventional surgical instruments are inadequate for accurately locating, aligning, and orienting osteotomy cuts in orthopedic procedures, particularly when accessing the talus, due to challenges in properly positioning and fixing the malleolus during surgery.
Innovation Solution
A patient-specific osteotomy system with a resection guide and fixation guide that includes a bone engagement surface matching the contour of the long bone, a resection feature for guiding cuts, and a fixation guide for indicating fastener paths, allowing precise alignment and fixation of bone fragments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional surgical instruments are used for osteotomy, then the surgical procedure can be performed, but the accuracy in locating, aligning, and orienting osteotomy cuts deteriorates
Solution Approach 1:
The surgical system is divided into multiple patient-specific components including a resection guide, fixation guide, and reduction guide. Each guide is customized to match the patient's unique anatomy and surgical requirements, allowing precise localization and orientation of osteotomy cuts without requiring a single complex instrument
Solution Approach 2:
Patient-specific guides are designed and manufactured before surgery based on preoperative imaging and planning. The guides incorporate pre-calculated osteotomy trajectories, drilling paths, and fixation hole locations, eliminating the need for intraoperative measurement and alignment adjustments
2Reliability
If conventional techniques are used to position and fix the malleolus, then the surgical procedure can be completed, but the reliability of proper positioning deteriorates
Solution Approach 1:
Patient-specific fixation guides serve as intermediaries between the surgeon and the bone structure. These guides incorporate templates that directly interface with anatomical landmarks and provide predetermined pathways for fixation devices, ensuring accurate and reliable positioning of the malleolus without requiring complex manual alignment techniques
Solution Approach 2:
The system replaces complex mechanical alignment techniques with pre-fabricated patient-specific guides that incorporate all necessary alignment information. The guides use direct anatomical registration and pre-planned trajectories to eliminate the need for intraoperative mechanical measurement and adjustment procedures
3Manufacturing precision
If patient-specific guides are used for osteotomy, then surgical accuracy improves, but the device complexity and customization requirements increase
Solution Approach 1:
The patient-specific guides are designed to perform multiple functions within single components. The resection guide incorporates both osteotomy trajectory guidance and depth limitation features, while the fixation guide provides both drilling path guidance and fixation hole positioning, reducing the total number of separate instruments needed
Data Source
AI summary
An apparatus, system, and method are disclosed for remediating a condition present in a patient. In certain implementations, the device may include a body having a medial side, a lateral side, a superior side, an inferior side, an anterior side, and a posterior side. In addition, the device may include a bone engagement surface on a bone-facing side of the body, the bone engagement surface configured to engage a surface of a patient. The device may include a bone attachment feature configured to couple the body to a long bone of the patient. Moreover, the device may include a resection feature that guides resection of the long bone to separate a malleolus from the long bone.