Surgical Cassette Air Filter Integration
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Solution Overview
Problem
Conventional surgical cassettes for ophthalmic surgery require costly filter housings and gaskets to maintain sterility, increasing the overall cost and complexity of air filtration.
Innovation Solution
A surgical cassette design featuring a filter chamber with thermally sealed hydrophobic, micro-bacterial filter media between two rigid surfaces, eliminating the need for filter housings and gaskets, and allowing for multiple filter chambers to be produced at reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard medical grade air filters with hydrophobic filter media are installed in plastic filter housings, then air filtration effectiveness is improved, but cost increases significantly (filter housing cost is approximately ten times the filter media cost)
Solution Approach 1:
The patent merges the filter media directly with the cassette housing by integrating the hydrophobic filter media into the rigid housing structure itself, eliminating the separate plastic filter housing. This integration maintains filtration effectiveness while removing the expensive housing component, reducing overall manufacturing cost.
Solution Approach 2:
The patent extracts the expensive plastic filter housing from the conventional filter assembly and eliminates it entirely by integrating the filter media directly into the cassette housing. Only the essential filter media remains, providing the same filtration function without the costly housing structure.
2Ease of manufacture
If hydrophobic filter media are disposed directly into surgical cassettes, then manufacturing cost is reduced, but gaskets or additional sealing components are required to effectively seal the filter media
Solution Approach 1:
The patent combines the sealing function with the rigid housing structure by integrating sealing surfaces directly into the housing that thermally bond to the filter media. This eliminates the need for separate gaskets or sealing components while maintaining effective sealing.
Solution Approach 2:
The patent replaces mechanical sealing components (gaskets, seals) with thermal sealing by bonding the filter media directly to the rigid housing surfaces. This substitution eliminates the need for additional sealing parts and simplifies the overall assembly.
3Reliability
If filter media are thermally sealed to rigid surfaces, then sealing reliability is improved and additional sealing components are eliminated, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes thermal parameters (heat and pressure) to create reliable seals between the filter media and rigid housing surfaces. By controlling thermal sealing parameters during manufacturing, the process achieves both high sealing reliability and reasonable manufacturing precision requirements.
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
This design enhances air filtration efficiency while significantly reducing costs and simplifying the production process by integrating the filter media directly within the cassette's rigid components, eliminating the need for additional sealing components.
Implementation Method 1
Hydrophobic, micro-bacterial filter media have also been disposed directly into surgical cassettes
Implementation Method 2
A filter media is disposed within the chamber between the first rigid surface and the second rigid surface
Implementation Method 3
The filter media is thermally sealed to either the first rigid surface or the second rigid surface
Data Source
AI summary
A surgical cassette having a filter media sealingly disposed between a first rigid surface and a second rigid surface in a filter chamber of the cassette housing provides improved air filtering for the cassette.