Positive Airway Pressure Ramping With Breathing-Rate Modulation
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Solution Overview
Problem
Existing positive airway pressure (PAP) systems struggle to help users with sleep-onset insomnia fall asleep comfortably during the ramp-up phase, as they are awake longer and experience discomfort, reducing adherence.
Innovation Solution
A control system that applies a progressive increase in pressure with pressure modulation to promote a target breathing rate, using slow-paced breathing guidance, which toggles between higher and lower pressures to mimic inhalation and exhalation, enhancing respiratory sinus arrhythmia and vagal afferents for improved sleep quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ramp pressure profile is used to increase air pressure incrementally over a fixed period of time, then patient comfort during falling asleep is improved, but the total time to reach therapeutic pressure is extended and patients remain awake longer experiencing potential discomfort
Solution Approach 1:
The patent applies periodic action by superimposing slow-paced breathing (SPB) cycles on the ramp pressure profile. The SPB function creates periodic pressure modulations that guide the patient's breathing rhythm, promoting relaxation and faster sleep onset while maintaining the gradual pressure increase. This combines the benefits of ramp comfort with accelerated sleep induction through rhythmic breathing guidance.
Solution Approach 2:
The patent implements preliminary action by initiating the SPB guidance function at the start of the ramp period, before the patient has fully acclimated to the pressure. This early intervention with guided breathing rhythms helps patients relax and fall asleep faster during the critical initial phase, reducing the overall time spent awake while maintaining comfort throughout the pressure ramp-up.
2Reliability
If therapeutic pressure is applied immediately, then treatment effectiveness is improved, but patient comfort and adherence are reduced due to discomfort during sleep onset
Solution Approach 1:
The periodic SPB pressure modulations maintain treatment effectiveness by guiding breathing rhythms throughout the entire ramp period, ensuring that therapeutic benefits are achieved even as pressure increases gradually. The rhythmic guidance ensures patients remain engaged with the therapy and achieve the therapeutic goals while maintaining comfort.
Solution Approach 2:
The SPB function performs preliminary action by preparing patients for therapeutic pressure application through guided relaxation and breathing control. This preliminary breathing guidance reduces anxiety and discomfort associated with immediate pressure application, improving both comfort and eventual treatment adherence without compromising therapeutic effectiveness.
3Ease of operation
If the ramp period is extended to allow patients to fall asleep, then comfort is improved, but the duration of potential discomfort and mask airflow awareness is increased
Solution Approach 1:
The periodic SPB guidance creates a soothing rhythmic pattern that actively promotes relaxation and sleep onset. This rhythmic breathing guidance occupies the patient's attention in a positive, relaxing way, making the ramp period feel shorter and more comfortable, thereby reducing the perceived duration of awareness of PAP support while maintaining comfort.
Solution Approach 2:
The SPB function provides feedback to patients through rhythmic pressure modulations that respond to and guide their breathing patterns. This feedback loop helps patients synchronize their breathing with the therapeutic rhythm, accelerating sleep onset and reducing the subjective duration of discomfort and awareness of the PAP support during the ramp period.
Data Source
AI summary
A control system is provided for controlling a pressure applied by a pressure source of a positive airway pressure support system. A progressive increase is provided in the pressure applied during a fall asleep time period of a user of the system. A pressure modulation is applied during the progressive increase. The modulation is for promoting a target breathing rate of the user,