Surgical Console Pressure Sensor Assembly with Backup Infusion
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Solution Overview
Problem
Existing ophthalmic surgical procedures face challenges in accurately and efficiently monitoring and maintaining intraocular pressure during fluid infusion or irrigation, which is crucial for the success and safety of the procedure.
Innovation Solution
A back-up infusion pressure sensor module is provided, which includes a squeeze plate configured to engage with a fluid bag and a pressure sensor assembly with a sensor door and frame, biasing members, and a force sensor to determine the pressure force against the fluid bag, ensuring accurate pressure monitoring and backup infusion capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensor assembly is integrated into the fluidics module to monitor fluid pressure, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The pressure sensor assembly is integrated into the fluidics module by combining multiple components (sensor door, sensor frame, springs, bracket, force sensor) into a unified assembly that monitors fluid pressure directly within the fluid pathway, eliminating the need for separate external monitoring systems
Solution Approach 2:
The sensor door serves multiple functions: it acts as a closure for the sensor opening, a transmission element for mechanical forces from the fluid pressure, and a structural component that interfaces with the sensor frame and springs, thereby reducing the need for additional separate components
2Reliability
If a backup infusion mechanism with springs is implemented to provide pressure during power loss, then reliability is improved, but device complexity increases
Solution Approach 1:
The springs are pre-loaded and positioned within the sensor assembly to automatically engage and provide infusion pressure when power is lost, creating a backup mechanism that is ready in advance to compensate for power failure without requiring separate emergency equipment
Solution Approach 2:
The backup infusion mechanism is merged with the pressure sensor assembly by integrating the springs and bracket into the same structural framework, allowing the sensor assembly to serve both monitoring and backup infusion functions
3Measurement precision
If the sensor door is designed to pivot to contact the fluid bag for pressure sensing, then measurement precision is improved, but ease of operation decreases
Solution Approach 1:
The sensor door is designed to pivot dynamically in response to fluid pressure forces, automatically adjusting its position to maintain optimal contact with the fluid bag and ensure accurate pressure sensing without requiring manual intervention
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 effectively monitors and maintains intraocular pressure during ophthalmic surgical procedures, ensuring the stability and safety of the eye by providing accurate fluid pressure control and a backup mechanism in case of power loss.
Implementation Method 1
a force sensor in contact with the spring bracket, configured to determine a pressure force against the fluid bag
Implementation Method 2
one or more springs, a spring bracket coupled to the one or more springs
Data Source
AI summary
A back-up infusion pressure sensor module for use in an ophthalmic surgical console includes a squeeze plate configured to engage with a fluid bag. The back-up infusion pressure sensor module further includes a pressure sensor assembly, having a sensor door and a sensor frame, wherein the sensor door pivots relative to a pin coupled to a top portion of the pressure sensor assembly, configured to cause the sensor door to be biased towards the fluid bag. The pressure sensor assembly comprises a base mounted to the back side of the sensor frame of the pressure sensor assembly, one or more springs, a spring bracket coupled to the one or more springs, and a force sensor in contact with the spring bracket, configured to determine a pressure force against the fluid bag.