Active Ventilator Valve for Dynamic Pressure Control
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Solution Overview
Problem
Existing ventilators rely on separate mechanical components for safety valves, positive pressure relief valves (PPRV), and negative pressure relief valves (NPRV), which cannot be adjusted to accommodate varying patient needs and suffer from accuracy degradation over time.
Innovation Solution
A ventilator system incorporating an electromagnet, shaft, and diaphragm valve that can be controlled by a controller to dynamically adjust pressure thresholds and regulate pressure, functioning as a single component for safety, PPRV, and NPRV, using a computer-readable medium to implement a method for controlling ventilation by setting inhalation pressure limits and responding to pressure readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mechanical valves (safety valve, PPRV, NPRV) are used, then each valve provides a specific function, but the device complexity increases and the valves cannot be adjusted to accommodate different patient requirements
Solution Approach 1:
The patent combines three separate mechanical valves (safety valve, PPRV, and NPRV) into a single integrated valve assembly. This unified valve is controlled by an electromagnet that can selectively open or close different valve pathways based on control signals, thereby reducing the number of separate components while maintaining all three pressure control functions.
Solution Approach 2:
The integrated valve assembly performs multiple functions simultaneously: it acts as a safety valve to prevent over-pressurization, a PPRV to deliver positive pressure during inhalation, and an NPRV to relieve negative pressure during exhalation. The electromagnet enables this single valve to universally handle all three pressure control scenarios that previously required three separate mechanical valves.
2Manufacturing precision
If purely mechanical valves with fixed spring mechanisms are used, then the threshold pressure is set, but the adaptability to accommodate different patient requirements is lost
Solution Approach 1:
The patent replaces the traditional mechanical spring-based threshold setting mechanism with an electromagnet-controlled system. Instead of physically adjusting spring tension to change pressure thresholds, the system uses electrical control signals to activate the electromagnet, which then opens or closes the valve pathways. This substitution enables dynamic, programmable pressure threshold adjustment while maintaining precise control.
Solution Approach 2:
The valve system transitions from static, fixed pressure thresholds determined by mechanical spring pre-compression to dynamic, adjustable thresholds controlled by electrical signals. The electromagnet can be activated at different pressure levels based on real-time patient needs, allowing the pressure control parameters to adapt dynamically during ventilation therapy.
3Measurement precision
If fixed threshold pressure valves are used, then the initial pressure control is accurate, but the accuracy degrades over time due to mechanical wear
Solution Approach 1:
The patent eliminates the mechanical spring mechanism that is subject to wear and degradation over time by replacing it with an electromagnet. The electromagnet's magnetic field strength can be maintained consistently through electrical control, avoiding the progressive degradation that occurs with mechanical springs. This substitution preserves pressure threshold accuracy throughout the operational lifespan of the valve.
Solution Approach 2:
The system incorporates pressure sensing and control feedback mechanisms that monitor the actual pressure in the patient circuit and adjust electromagnet activation accordingly. This feedback loop ensures that pressure thresholds remain accurate over time by compensating for any drift or variation, maintaining measurement precision throughout the valve's operational life.
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 precise and adaptable pressure control in ventilator systems, accommodating different patient requirements and maintaining accuracy, thereby enhancing the safety and efficacy of ventilation processes.
Implementation Method 1
an electromagnet; a shaft connected to the electromagnet; and a diaphragm connected to the shaft. The electromagnet applies a force to the diaphragm based on an input.
Data Source
AI summary
A method for controlling a ventilator includes the steps of providing an inhalation pressure limit, determining when a pressure in a connection to a patient circuit is greater than the inhalation pressure limit, and opening the valve when the pressure is greater than the inhalation pressure limit. An associated computer readable medium for controlling the method is also described.