Syringe Piston with Integrated Filter for Bone Cement Vapor Containment
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Solution Overview
Problem
The preparation of bone cement in medical procedures poses a risk due to toxic vapors from methyl methacrylate monomer, which can cause lung, liver, and heart valve damage, necessitating a device that prevents exposure to these harmful fumes.
Innovation Solution
A piston device with a valve body and filter within a syringe that advances to express and filter gaseous vapors, trapping them within the piston and preventing their release into the environment, allowing safe preparation and application of bone cement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If bone cement is prepared using traditional mixing methods, then the bone cement can be properly mixed and applied, but toxic vapors from methyl methacrylate monomer are released causing harmful exposure
Solution Approach 1:
A filter is introduced as an intermediary component within the piston assembly to capture and retain toxic methyl methacrylate monomer vapors. The filter acts as a mediator between the bone cement mixture and the environment, allowing the preparation process to proceed while preventing harmful vapor release.
Solution Approach 2:
The harmful vapor phase is extracted and separated from the bone cement mixture through the filter mechanism. The filter selectively removes toxic vapors from the mixture, allowing the beneficial components to proceed with the preparation and application process while isolating the harmful elements.
2Object-affected harmful factors
If additional filtration systems are added to prevent vapor exposure, then toxic vapor release is reduced, but device complexity increases
Solution Approach 1:
The filtration system is merged with the existing piston assembly, integrating the filter within the piston structure itself. This combination eliminates the need for separate, additional filtration systems while maintaining the vapor capture function, thereby reducing overall device complexity.
Solution Approach 2:
The piston assembly is designed to serve multiple functions: it maintains the sealing function of the syringe, enables the mixing action, and incorporates the vapor filtration capability. This multi-functionality eliminates the need for separate dedicated filtration components, simplifying the overall device architecture.
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 the safe preparation and application of bone cement by containing toxic vapors, reducing exposure risks for both the preparer and patient, and eliminating the need for additional filtration systems.
Implementation Method 1
a filter disposed within the proximal end of the valve body... configured to provide fluid flow through the valve body
Data Source
AI summary
A piston configured to be received within a syringe is disclosed. The piston includes a valve body defining a proximal end and a distal end, a filter disposed within the proximal end of the valve body, and a valve disk disposed within the distal end of the valve body. As the piston is advanced through the syringe, the valve disk is configured to provide fluid flow through the valve body.