Enhanced CPAP Apparatus with Advanced Noise Reduction and Real-Time Sleep Stage Optimization

Publication ID: 24-11857724_0006_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced CPAP Apparatus with Advanced Noise Reduction and Real-Time Sleep Stage Optimization,” Published Technical Disclosure No. 24-11857724_0006_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857724_0006_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,724.

Summary of the Inventive Concept

The present inventive concept relates to a CPAP apparatus that incorporates a noise-reducing mechanism, real-time sleep stage optimization, and humidity control to provide improved therapy for sleep apnea patients.

Background and Problem Solved

The original CPAP apparatus patent (BACKGROUND) has limitations in terms of operational noise, inconsistent air flow, and lack of real-time sleep stage optimization. The present inventive concept addresses these limitations by introducing a noise-reducing mechanism integrated into the fan, a method for operating the CPAP apparatus that adjusts the fan's rotational speed based on a patient's breathing pattern, and a humidity control system to maintain a predetermined humidity level in the delivered air.

Detailed Description of the Inventive Concept

The enhanced CPAP apparatus comprises a housing with an intake inlet and an exhaust outlet, an air passage connected to the exhaust outlet, a fan expelling air from the air passage, and a noise-reducing mechanism integrated into the fan to minimize operational noise. The noise-reducing mechanism includes a sound-absorbing material lining the air passage. The apparatus further comprises a sensor to detect the patient's sleep stage and a control unit that adjusts the air pressure and flow rate in real-time based on the detected sleep stage to optimize the patient's sleep quality. Additionally, the apparatus includes a humidity control system that maintains a predetermined humidity level in the delivered air to prevent drying of the patient's airway.

Novelty and Inventive Step

The new claims introduce a novel noise-reducing mechanism, real-time sleep stage optimization, and humidity control, which are not present in the original patent. These advancements provide a significant improvement in the therapy experience for sleep apnea patients, making the inventive concept novel and non-obvious.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include varying the design of the noise-reducing mechanism, such as using different sound-absorbing materials or incorporating active noise cancellation technology. Additionally, the sleep stage optimization algorithm could be modified to accommodate different patient demographics or sleep disorders.

Potential Commercial Applications and Market

The enhanced CPAP apparatus has significant commercial potential in the sleep therapy market, particularly among patients who require continuous positive airway pressure therapy. The improved noise reduction, real-time sleep stage optimization, and humidity control features would provide a competitive advantage in the market, increasing patient comfort and adherence to therapy.

CPC Classifications

SectionClassGroup
A A61 A61M16/024
A A61 A61M16/0003
A A61 A61M16/0066
A A61 A61M2016/003
A A61 A61M2016/0027
A A61 A61M2205/103
A A61 A61M2205/3334
A A61 A61M2205/502

Field of Art

Medical Device Engineering, specifically Continuous Positive Airway Pressure (CPAP) apparatus design, involving respiratory therapy technologies, fluid dynamics, noise reduction, and patient monitoring systems

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer with expertise in respiratory medical devices, familiar with pneumatic systems, sensor integration, noise control techniques, and sleep disorder treatment technologies, typically holding a master's degree or equivalent professional experience

Obviousness Rationale

A PHOSITA would recognize that the disclosed variations represent predictable engineering improvements to the base CPAP apparatus design, utilizing standard techniques in medical device optimization such as noise reduction, adaptive pressure control, and patient-specific monitoring. The technical modifications represent incremental advancements that would be readily conceived by a skilled practitioner seeking to enhance patient comfort and therapeutic effectiveness.

Obvious Combinations & Variations

Source Patent Element
Fan-based air delivery system with configurable rotational parameters
PTD Variation
Integrating a noise-reducing mechanism with sound-absorbing material lining the air passage
Obviousness Reasoning
Noise reduction in pneumatic systems is a known engineering challenge with well-established mitigation techniques, making the addition of sound-absorbing materials a predictable design optimization
Source Patent Element
Processor-controlled fan operation with pressure and flow rate monitoring
PTD Variation
Real-time sleep stage detection and dynamic air pressure adjustment
Obviousness Reasoning
Adaptive control systems are common in medical devices, and extending processor-based control to incorporate sleep stage monitoring represents a logical extension of existing technological capabilities
Source Patent Element
Memory storage for air pressure and flow rate relationships
PTD Variation
Humidity control system maintaining predetermined moisture levels in delivered air
Obviousness Reasoning
Physiological parameter management is a standard consideration in respiratory medical devices, making humidity control a foreseeable enhancement to existing CPAP technology
Source Patent Element
Fan driver configured to modulate rotational parameters based on processor commands
PTD Variation
Sensor-driven dynamic air flow optimization based on patient breathing patterns
Obviousness Reasoning
Patient-specific adaptive control represents a natural progression in medical device design, utilizing existing sensor and control infrastructure
Source Patent Element
Air passage and exhaust outlet configuration
PTD Variation
Active noise cancellation technology as an alternative noise reduction mechanism
Obviousness Reasoning
Exploring alternative noise mitigation strategies is a standard engineering approach when addressing technical limitations in existing designs
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857724 and the technical variations disclosed herein, a person having ordinary skill in the art would find the claimed innovations obvious and lacking in non-obvious subject matter. The incremental improvements in CPAP apparatus design, including noise reduction, adaptive pressure control, and patient-specific monitoring, represent predictable engineering solutions within the existing technological framework of respiratory medical devices.

Original Patent Information

Patent NumberUS 11,857,724
TitleCPAP apparatus
Assignee(s)MURATA MANUFACTURING CO., LTD.