Blade Guide Block for Faster Prosthesis Removal in Revision Surgery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing joint revision surgery methods are invasive, time-consuming, and often result in significant blood loss, longer operating room times, and increased morbidity due to the complexity of removing prosthetic implants, particularly collared femoral stems.
Innovation Solution
A Joint Revision Surgery Apparatus featuring a blade guide block frame with varying sizes and configurations, secured by a T handle screw, which guides straight, curved, and compound curved knife blades to efficiently remove prosthetic implants by aligning with the existing prosthesis and minimizing bone contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional joint revision surgery methods are used to remove prosthetic implants, then the procedure can be completed, but the surgery becomes invasive, time-consuming, and results in significant blood loss
Solution Approach 1:
The surgical system is divided into modular components including a guide block with multiple slots, various knife blades (straight, curved, compound curved), and attachment mechanisms. This segmentation allows the surgeon to select and combine specific components based on the prosthesis geometry, making the complex removal task more manageable and efficient
Solution Approach 2:
The guide block serves as an intermediary device between the surgeon and the prosthesis. It provides a structured interface with multiple slots that guide knife blades to specific locations on the prosthesis, enabling precise and systematic removal without requiring direct manual manipulation of complex surgical tools
2Reliability
If traditional methods are used to remove collared femoral stems, then the prosthesis can be removed, but operating room time increases and morbidity increases
Solution Approach 1:
The guide block is pre-configured with multiple slots positioned to correspond with specific features of the prosthesis (collar, shaft, modular junctions). This preliminary arrangement of cutting paths allows the surgeon to systematically address each section of the prosthesis in a predetermined sequence, ensuring complete removal while minimizing unnecessary exposure and operating time
Solution Approach 2:
The guide block design incorporates multiple slots that can accommodate various types of knife blades (straight, curved, compound curved) to handle different prosthesis configurations. This multi-functionality allows the same guide block to effectively remove collared femoral stems, uncrowned stems, and other prosthesis types, ensuring reliable removal across different scenarios
3Ease of operation
If existing prosthesis removal techniques are used, then the implant can be extracted, but blood loss increases and recovery time extends
Solution Approach 1:
The guide block provides localized guidance at specific sites on the prosthesis through its multiple slots. Each slot is positioned to guide a knife blade to a specific location (collar, shaft, modular junction), allowing precise, targeted cutting that minimizes unnecessary tissue disruption and blood loss while maintaining ease of operation
Data Source
AI summary
The present application is directed a Joint Revision Surgery Apparatus which includes a surgical knife blade guide block which has a plurality of rearward blade guide slots, a central cavity and a large forward slot having an adjustable knife blade guide pressure plate. The surgical knife blade guide block central cavity houses a stem trunnion securing member and is positioned over the trunnion end of the existing prosthesis to be removed and secured to the prothesis. The guide blade block is secured to the trunnion of the prosthesis to be extracted using a stem trunnion securing member housed within the guide block. Straight, curved and compound curved knife blades are guided by the blade guide slots to cut the prothesis free. The Joint Revision Surgery Apparatus facilitates rapid, efficient and complete removal of an existing prosthesis during joint revision surgery, and significantly increases positive medical outcomes for joint revision procedures.