Surgical Cassette Alignment Sensing for Stable Fluid Pressure
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Solution Overview
Problem
Current surgical fluid aspiration systems for eye treatments face challenges in accurately controlling fluid volume and pressure, leading to potential tissue damage due to misalignment and malfunctions of cassettes with consoles, which can result in system inefficiencies and safety issues during procedures.
Innovation Solution
A surgical cassette design with a gasket and valve system, accessible through the back plate, and tube retainers to prevent axial or torsional movement, coupled with a console that includes sensors for pressure and vacuum measurement, and a clamping mechanism for secure alignment and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vacuum-based aspiration systems are used to control fluid pressure accurately, then fluid pressure control is improved, but pressure surges occur during occlusion of the treatment probe
Solution Approach 1:
The system incorporates pressure sensors that continuously monitor fluid pressure and provide feedback to the control system. When pressure surges are detected during probe occlusion, the feedback mechanism adjusts the vacuum pump operation to maintain stable pressure, preventing the harmful pressure spikes while preserving accurate pressure control.
2Ease of operation
If cassette alignment with console is not properly controlled, then ease of operation is improved, but system reliability deteriorates due to misalignment
Solution Approach 1:
The system incorporates alignment sensors and detection mechanisms that perform preliminary alignment verification before the cassette becomes operational. The sensors detect the cassette's position and orientation, and the system provides guidance or automatic adjustment to ensure proper alignment before fluid flow begins. This preliminary action ensures reliable alignment while maintaining ease of operation, as the alignment check is automatic and does not require complex manual procedures.
Data Source
AI summary
A system and method of receiving a cassette to a console of a phacoemulsification system. The system and method may include receiving the cassette in close proximity to a cassette receptacle comprising a receiving surface, sensing variations in at least two variable resistances mounted respectively diagonally about the receiving surface, and comparing the variations as between the at least two variable resistances to assess an attitude of the cassette. The system and method may optionally include clamping the cassette responsively to the comparing step.