Positive Pressure Therapy Device with Blood Oxygen Feedback
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Solution Overview
Problem
Current positive pressure therapy devices for congestive heart failure patients struggle to adjust positive end-expiratory pressure (PEEP) optimally based on the patient's daily preload state, leading to inadequate pulmonary congestion relief and reduced blood oxygen levels.
Innovation Solution
A positive pressure therapy device equipped with a pressure raising unit, introducing unit, blood oxygen level measuring unit, and control unit that adjusts PEEP based on measured blood oxygen levels, blood flow rates, or cardiac output to maintain optimal pressure within the patient's changing daily preload state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PEEP is adjusted based on daily preload state, then pulmonary congestion relief is improved, but device complexity increases
Solution Approach 1:
The device incorporates a feedback mechanism where the control unit continuously monitors blood oxygen saturation levels and automatically adjusts PEEP settings based on the measured values. This closed-loop feedback system enables dynamic optimization of pulmonary congestion relief without requiring complex manual intervention or multiple sensors, thus improving reliability while controlling device complexity.
Solution Approach 2:
The positive pressure therapy device performs self-adjustment of PEEP settings by automatically processing blood oxygen saturation measurements and modifying therapy parameters accordingly. This self-service capability eliminates the need for continuous professional monitoring and manual adjustments, improving the reliability of pulmonary congestion relief while maintaining relatively simple device architecture.
2Reliability
If PEEP is increased to relieve pulmonary congestion, then gas exchange in lungs is improved, but intrathoracic pressure rises excessively
Solution Approach 1:
The control unit uses real-time feedback from blood oxygen saturation measurements to dynamically adjust PEEP levels. When blood oxygen saturation improves, the system automatically reduces PEEP to prevent excessive intrathoracic pressure buildup. This feedback-controlled approach ensures optimal gas exchange while maintaining intrathoracic pressure within safe limits.
Solution Approach 2:
The device implements dynamic PEEP adjustment rather than fixed settings, allowing the positive pressure level to vary continuously based on patient response. This dynamic approach enables the system to increase PEEP when needed for gas exchange improvement and decrease it when intrathoracic pressure becomes excessive, achieving a balanced therapeutic effect.
3Ease of operation
If fixed PEEP is used during sleep, then device operation is simple, but blood oxygen level decreases due to decubitus position
Solution Approach 1:
The device incorporates automatic feedback control that monitors blood oxygen saturation throughout sleep and adjusts PEEP settings in real-time. This eliminates the need for manual repositioning or adjustment by the user, maintaining ease of operation while ensuring blood oxygen levels remain stable despite changes in body position during sleep.
Solution Approach 2:
The positive pressure therapy device autonomously adapts to the patient's sleeping position and physiological changes by continuously monitoring blood oxygen saturation and self-adjusting PEEP settings. This self-service capability maintains simple operation for the user while reliably preventing blood oxygen level decreases that would otherwise occur due to decubitus position effects.
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 device ensures that PEEP is adjusted within an optimal range, improving pulmonary congestion relief and maintaining stable blood oxygen levels, thereby reducing symptoms such as paroxysmal nocturnal dyspnea and orthopnea.
Implementation Method 1
a pressure raising unit configured to raise pressure of air or a gas mixture of air and other gases to a positive pressure
Implementation Method 2
at least one of a blood oxygen level measuring unit configured to measure a blood oxygen level of the patient
Implementation Method 3
a control unit that controls the pressure raising unit based on the value of the measured blood oxygen level or the value of the blood flow rate
Data Source
AI summary
A positive pressure therapy device for congestive heart failure includes: a pressure raising unit configured to raise a pressure of an air or a gas mixture of the air and other gases to a positive pressure; an introducing unit configured to introduce the air or the gas mixture that is set to a positive pressure into the airway of a patient; and a blood oxygen level measuring unit configured to measure a value of a blood oxygen level of the patient. A control unit monit is configured to control the pressure raising unit based on the value of the blood oxygen level that is measured by the blood oxygen level measuring unit.