Bi-Level Airway Pressure Exhalation Detection Without Electronics
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Solution Overview
Problem
Existing bi-level positive airway pressure devices face challenges with portability and disposal due to sensors, electronics, and power supply issues, making them unsuitable for mobile patients, and they struggle to accurately detect inhalation and exhalation for effective pressure modulation.
Innovation Solution
A bi-level positive airway pressure device using a nozzle and receptor system to mechanically detect exhalation and inhalation, adjusting pressure through a movable occluding member based on gas pressure changes, eliminating the need for electronic sensors and batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electronic sensors and power supply are used in bi-level positive airway pressure devices, then pressure modulation accuracy is improved, but device portability and disposability are worsened
Solution Approach 1:
The patent replaces electronic sensors with a mechanical flow detection system using a nozzle and receptacle that detect exhalation flow mechanically, eliminating the need for electronic components, batteries, and power supplies while maintaining bi-level pressure modulation capability
Solution Approach 2:
The invention extracts and removes electronic components (sensors, power supply, circuitry) from the device, replacing them with a purely mechanical system that achieves the same functional goals without the weight and complexity of electronics
2Measurement precision
If electronic sensors and power supply are used in bi-level positive airway pressure devices, then exhalation detection accuracy is improved, but device complexity is worsened
Solution Approach 1:
The patent replaces complex electronic detection systems with a simple mechanical nozzle-receptacle system that detects exhalation flow through direct mechanical interaction, reducing device complexity while maintaining detection accuracy
Solution Approach 2:
The mechanical flow detection system is self-actuating and self-regulating, using the patient's own exhalation flow to trigger the pressure modulation without requiring external power sources or complex electronic control circuits
3Adaptability or versatility
If compressed gas cylinder is used for portability, then device mobility is improved, but device disposal and sustainability are worsened
Solution Approach 1:
The patent enables the device to be manufactured as a disposable unit without compressed gas cylinders or rechargeable batteries, allowing single-use deployment that eliminates disposal issues associated with heavy electronic components and compressed gas tanks
Solution Approach 2:
The mechanical flow detection system serves multiple functions (exhalation detection, pressure regulation triggering) without requiring separate electronic subsystems, enabling a simplified disposable design that maintains clinical effectiveness
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
Enables portable and disposable bi-level positive airway pressure devices that accurately modulate pressure for inhalation and exhalation, improving patient comfort and mobility without the limitations of electronic components.
Implementation Method 1
A nozzle is emitting a jet of a gas across the conduit and directed at a receptor channel when exhalation gases flow from the patient port, thereby increasing a gas pressure is present at the receptor channel
Implementation Method 2
The exhalation detector converts the increase in the gas pressure into a movement of an occluding member such that when the exhalation gases flow from the patient port, the occluding member moves to block the means for generating the positive airway pressure
Data Source
AI summary
A bi-level positive airway pressure device includes a housing that has a patient port for connecting to an airway of a patient. There is a device (e.g., a nozzle) for generating a positive airway pressure that is directed through a conduit towards the patient port. An exhalation detector includes a nozzle emitting a jet of a gas directed across the conduit and directed at a receptor channel. When exhalation gases flow from the patient port, the jet of gas is deflected. The exhalation detector converts the decrease in the gas pressure into a movement of an occluding member such that when the exhalation gases flow into the conduit from the patient port, the occluding member moves to block the means for generating the positive airway pressure reducing resistance to exhalation by the patient.