Pressure-Driven Irrigation Pump Eliminates Electrical Noise
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Solution Overview
Problem
Peristaltic irrigation pumps introduce electrical noise during medical procedures due to the piezoelectric effect, interfering with cardiac voltage measurements.
Innovation Solution
A pressure-driven irrigation pump with two compartments and a paddle that alternates between applying pressure to each compartment to pump fluid, using a control module to regulate flow and avoid electrical noise, ensuring continuous fluid delivery without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a peristaltic irrigation pump is used to deliver irrigation fluid, then fluid delivery is achieved, but electrical noise is generated due to the piezoelectric effect that interferes with cardiac voltage measurements
Solution Approach 1:
The patent replaces the peristaltic pump mechanism with a pressure-driven pump system that uses a piston and check valves to deliver irrigation fluid. This mechanical substitution eliminates the piezoelectric effect associated with peristaltic pumps, thereby removing the source of electrical noise interference with cardiac voltage measurements while maintaining fluid delivery functionality.
2Device complexity
If a pressure-driven pump with single compartment is used, then fluid delivery is simplified, but continuous fluid delivery and flow control are compromised
Solution Approach 1:
The patent divides the pump chamber into two separate compartments, each with its own check valve and piston arrangement. This segmentation allows the pump to deliver fluid continuously by alternating compression of the two compartments, ensuring that while one compartment is being compressed, the other is being filled, thereby maintaining continuous flow without requiring complex multi-piston mechanisms.
3Productivity
If a paddle mechanism is used to alternate pressure application between compartments, then continuous fluid delivery is achieved, but device complexity increases
Solution Approach 1:
The patent employs a paddle mechanism that periodically alternates between compressing the first compartment and compressing the second compartment. This periodic action creates a rhythmic pumping sequence where the paddle moves back and forth, compressing one compartment while the other is being filled, thereby achieving continuous fluid delivery through simple periodic motion rather than complex continuous control systems.
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 eliminates electrical noise, allowing for precise cardiac voltage measurements while providing continuous and controlled irrigation fluid delivery during medical procedures.
Implementation Method 1
the paddle applies pressure to the first container so as to pump the fluid therefrom
Implementation Method 2
the paddle applies the pressure to the second container so as to pump the fluid therefrom
Data Source
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AI summary
A medical pump includes first and second compartments, which are configured to accept respective first and second containers of fluid to be pumped to a medical device, and a paddle, which is fitted between the first and second compartments. The pump additionally includes a control module, which is configured to drive the paddle to alternate between first time periods in which the paddle applies pressure to the first container so as to pump the fluid therefrom, and second time periods in which the paddle applies the pressure to the second container so as to pump the fluid therefrom.