Vibratory Prosthesis Installation System for Acetabular Cup Placement
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Solution Overview
Problem
Current total hip replacement procedures face challenges in achieving precise and consistent placement and orientation of the acetabular component due to the use of crude tools and manual impact methods, which can lead to complications such as incorrect positioning and increased risk of fracturing the acetabulum, especially for less experienced surgeons.
Innovation Solution
A system and method utilizing a gun-like device that employs vibratory energy to accurately insert and position the acetabular cup, allowing for precise control of abduction and anteversion angles without manual impact, using pneumatic and electric motor implementations to facilitate precise placement and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automated navigation tools are used to determine correct orientation and placement, then positioning accuracy is improved, but the need for manual impacting with hammer/mallet introduces unpredictable force variables that worsen positioning precision
Solution Approach 1:
The patent replaces the traditional mechanical hammer/mallet impacting system with a pressurized fluid delivery system. The fluid jet delivers controlled, predictable forces to advance the needle through bone tissue, eliminating the unpredictable force variables introduced by manual impacting while maintaining the ability to achieve precise positioning as determined by computer-assisted navigation.
Solution Approach 2:
The invention employs a pressurized fluid delivery system where controlled fluid flow generates predictable forces for advancing the needle. The fluid pressure and flow rate can be precisely regulated, providing consistent and controllable advancement forces that do not introduce the variability inherent in manual hammer strikes, thus preserving positioning accuracy throughout the entire insertion process.
2Reliability
If experienced surgeons perform procedures with manual impacting tools, then favorable outcomes are achieved, but less experienced surgeons face increased risks of complications due to inability to control impacting forces
Solution Approach 1:
The pressurized fluid delivery system performs the force control function automatically without requiring surgeon expertise in judging and applying appropriate impacting forces. The system self-regulates the advancement forces through controlled fluid pressure, making the procedure reliable regardless of the surgeon's experience level with manual impacting techniques.
Solution Approach 2:
By replacing the manual hammer/mallet system with an automated pressurized fluid delivery system, the invention removes the need for surgeons to develop and apply expert judgment in controlling impacting forces. The automated system provides consistent, predictable force delivery that eliminates the experience-dependent variability in manual impacting techniques.
3Manufacturing precision
If large impacting forces are applied to adjust prosthesis location, then positioning can be corrected, but the risk of fracturing and shattering the acetabulum increases
Solution Approach 1:
The pressurized fluid delivery system enables continuous adjustment of advancement forces by varying fluid pressure and flow rate parameters. This allows for fine, controlled adjustments to prosthesis location without the need for large impacting forces, thereby correcting positioning errors while minimizing the risk of bone fracturing or shattering.
Solution Approach 2:
The replacement of manual impacting with a pressurized fluid system provides continuous, controllable force delivery rather than discrete high-impact strikes. This enables gradual positioning adjustments that can correct placement errors without subjecting the acetabulum to the large impacting forces that cause fracturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables any surgeon to achieve a favorable outcome comparable to that of an experienced surgeon by ensuring accurate and efficient placement of the acetabular component with reduced risk of complications, such as fracturing the acetabulum, and allows for fine-tuning of the component's position without manual impact forces.
Implementation Method 1
communicating a series of pulses from the oscillation engine to the prosthesis producing a vibrating prosthesis
Data Source
AI summary
A system and method for allowing any surgeon, including those surgeons who perform a fewer number of a replacement procedure as compared to a more experienced surgeon who performs a greater number of procedures, to provide an improved likelihood of a favorable outcome approaching, if not exceeding, a likelihood of a favorable outcome as performed by a very experienced surgeon with the replacement procedure.