Patella Clamp with Torque Knob and Disposable Bushings
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Solution Overview
Problem
Existing patella clamps do not facilitate quick connection and disconnection for cleaning and re-use while providing consistent and measured pressure to the patella construct during surgical procedures for artificial prostheses installation.
Innovation Solution
A clamp device with a spiked platform and a bushing adapter that allows for controlled pressure application using a torque knob, enabling precise pressure measurement and quick disassembly for cleaning, featuring a hinged design and interchangeable bushing inserts for different patella sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional patella clamp is used, then the patella can be held during surgery, but the clamp cannot be quickly disconnected for cleaning and re-use
Solution Approach 1:
The clamp is divided into separable components including a reusable clamp body and disposable bushing inserts. This segmentation allows the main clamp structure to be quickly disconnected for cleaning while the bushing inserts can be replaced, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The patent employs disposable bushing inserts that are discarded after single use, while the main clamp body is reusable. This approach simplifies the cleaning process by allowing disposal of contaminated components while retaining the investment in the main clamp device, addressing the quick disconnection need without excessive complexity.
2Measurement precision
If pressure is applied to the patella construct, then the artificial patella is secured, but the pressure cannot be precisely measured or controlled
Solution Approach 1:
The torque knob provides tactile feedback and a reference scale that allows the surgeon to precisely control and measure the applied pressure. As the knob is rotated, it provides measurable resistance and position indicators, enabling precise pressure application without complex electronic sensing systems.
Solution Approach 2:
The torque knob mechanism is designed to be self-measuring through its mechanical properties. The knob's rotation resistance and position directly indicate the applied pressure, eliminating the need for separate sensors or complex measurement systems while maintaining precision.
3Productivity
If the clamp is designed for quick disassembly, then cleaning is facilitated, but consistent pressure control during curing may be compromised
Solution Approach 1:
By segmenting the clamp into a reusable body and disposable bushing inserts, the design enables quick disassembly for cleaning the main body while the bushing inserts maintain pressure consistency during use. The segmented design allows thorough cleaning of the clamp body without compromising the integrity of the pressure control mechanism.
Solution Approach 2:
The disposable bushing inserts ensure consistent pressure control during each use, while the reusable clamp body can be quickly disassembled and cleaned. This division allows the pressure-critical components to remain sealed and consistent, while the external surfaces requiring cleaning are easily accessible.
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
Enables accurate and consistent pressure application during bone cement curing, facilitating quick disassembly and cleaning, improving the installation of artificial patella prosthetics and reducing the risk of cross-contamination in surgical procedures.
Implementation Method 1
a spring positioned around the rod between the top and bottom arms
Implementation Method 2
threaded engagement of the torque knob with the rod
Data Source
AI summary
In the use of devices and methods for measuring applied pressure on an article, such as a patella construct during a surgical procedure, a clamp is provided with arms, an optional external spring, an optional internal spring and a torque knob for applying constant and measurable pressure to the article. Embodiments of the clamp include a spring rod engaged with the torque knob for assisting in applying and retaining desired pressure. Spike elements and a bushing insert are secured to the ends of the arms for retaining the article in place during use. The elements are advantageously assembled and disassembled to facilitate thorough and quick cleaning.