Breathing Flow Control Based on Awake and Sleep State
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Solution Overview
Problem
Existing breathing apparatuses do not effectively adjust flow and pressure based on whether a patient is awake or asleep, leading to undesirable effects when high flow or pressure is provided to an awake patient.
Innovation Solution
A method and apparatus that measure breath flow parameters such as respiratory rate and tidal volume to determine a patient's sleep state, adjusting the flow rate accordingly by increasing, decreasing, or maintaining it based on the comparison with baseline parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high flow rate is provided to patient, then therapy efficacy is improved, but patient comfort deteriorates when patient is awake
Solution Approach 1:
The breathing apparatus dynamically adjusts the flow rate based on the detected sleep state. When the patient is detected to be awake, the flow rate is reduced to a lower level. When the patient is detected to be asleep, the flow rate is increased to a higher therapeutic level. This dynamic adjustment resolves the contradiction by making the flow rate adaptive to the patient's state rather than fixed.
Solution Approach 2:
The system uses breath flow parameters (respiratory rate, tidal volume) as feedback to detect the patient's sleep state. This feedback loop enables the system to automatically determine whether the patient is awake or asleep and adjust the flow rate accordingly, thereby maintaining therapy efficacy while avoiding discomfort during awake periods.
2Ease of operation
If flow rate is adjusted based on sleep state, then patient comfort is improved, but device complexity increases
Solution Approach 1:
The breathing apparatus performs self-adjustment by automatically detecting the patient's sleep state through analysis of breath flow parameters and autonomously modifying the flow rate without requiring manual intervention from the patient or therapist. This self-service capability improves patient comfort while the automation masks the underlying complexity from the user.
Solution Approach 2:
The system changes operational parameters (flow rate) based on detected changes in patient state parameters (respiratory rate, tidal volume). By monitoring these physiological parameters and translating them into control decisions, the system achieves adaptive comfort management without requiring complex additional hardware interfaces.
Data Source
AI summary
The invention comprises a method of operating a breathing apparatus comprising measuring a baseline breath flow parameter being respiratory rate and/or tidal volume or a parameter derived therefrom, varying the flow rate provided by the breathing apparatus, measuring a current breath flow parameter being respiratory rate and/or tidal volume or a parameter derived therefrom, comparing the baseline and current breath flow parameters, and altering operation of the breathing apparatus based on the comparison. The invention also comprises a breathing apparatus that implements the above method.