Hydrostatic Ventilation Pressure Control for Low-Resource Respiratory Care
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Solution Overview
Problem
There is a limited availability of effective and affordable respiratory support devices for children with acute respiratory distress due to lower respiratory tract infections, particularly in low-resource settings.
Innovation Solution
A system comprising a container, tubing apparatus, and an actuator to move a port vertically within the container, controlling gas flow and pressure at the patient interface to assist breathing, utilizing hydrostatic pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical ventilation devices are used to provide respiratory support, then effective respiratory support is achieved, but device complexity and cost increase significantly
Solution Approach 1:
The system divides the respiratory support function into separate components: a gas source, a water seal chamber, and a patient interface. The water seal acts as a simple pressure-regulating valve that segments the pressure control function from the gas delivery system, enabling effective respiratory support without complex mechanical ventilators.
Solution Approach 2:
Water is introduced as an intermediary substance between the gas source and patient interface. The water seal in the tubing apparatus serves as a mediator that automatically regulates pressure through hydrostatic principles, replacing complex mechanical pressure control systems while maintaining effective respiratory support.
2Reliability
If advanced respiratory support devices are deployed, then patient outcomes improve, but availability and accessibility decrease due to cost and resource requirements
Solution Approach 1:
The system replaces expensive, complex mechanical ventilators with inexpensive components: a gas source, simple tubing with water seals, and basic control mechanisms. This dramatic cost reduction enables widespread availability and accessibility in low-resource settings while maintaining effective respiratory support for improved patient outcomes.
Solution Approach 2:
The water seal system provides automatic pressure regulation through hydrostatic principles without requiring complex electronics, microprocessors, or sophisticated control systems. This self-regulating mechanism reduces the need for technical expertise and infrastructure, significantly improving availability and accessibility in resource-limited environments.
3Device complexity
If pressure control mechanisms are simplified, then device complexity and cost reduce, but pressure adjustment capability and precision may worsen
Solution Approach 1:
The system changes the parameter of pressure control from active mechanical adjustment to passive hydrostatic regulation. By using water depth as the pressure-determining parameter, the system achieves precise and adjustable pressure control through simple means: changing the water level or tubing immersion depth adjusts the pressure delivered to the patient, maintaining adaptability while reducing complexity.
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
Provides low-cost, effective respiratory support by mimicking bubble CPAP and NIPPV, with adjustable inspiratory and expiratory pressures, reducing the need for mechanical ventilation.
Implementation Method 1
moving a third port of the tubing apparatus vertically within a container such that an amount of a liquid in the container that is above the third port changes, thereby changing a pressure at the patient interface
Data Source
AI summary
A system includes a container configured to contain a liquid. The system also includes a tubing apparatus having a first port configured for connection to a gas source, a second port configured for connection to a patient interface, and a third port configured for submersion within the liquid. The system also includes an actuator configured to move the third port vertically within the container. A method includes flowing gas into the first port of the tubing apparatus to the patient interface via the second port of the tubing apparatus. The method also includes moving the third port of the tubing apparatus vertically within the container such that an amount of the liquid in the container that is above the third port changes, thereby changing a pressure at the patient interface.