Respiratory Vent Slot Geometry for Quiet Exhalation Flow
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Solution Overview
Problem
Existing respiratory therapy devices and patient interfaces suffer from issues such as discomfort, noise, poor fit, reduced compliance due to aesthetics and complexity, and inefficiencies in gas exchange, leading to suboptimal treatment outcomes for respiratory disorders.
Innovation Solution
A vent system for respiratory therapy systems featuring slots with specific dimensions and configurations to minimize noise and discomfort, along with a patient interface that allows for improved fit and ease of use, incorporating a vent module and a tube portion with a bend to enhance comfort and efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vent is provided in a patient interface for respiratory therapy, then exhaled gases can be discharged from the patient interface to ambient, but noise and discomfort are generated for the patient
Solution Approach 1:
The vent is divided into multiple slots instead of a single opening. Each slot has specific dimensional ratios (length:height ≥ 10:1, width:height ≥ 15:1) to segment the gas flow into multiple smaller streams, reducing turbulence and noise while maintaining effective CO2 discharge
Solution Approach 2:
The slot dimensions are specifically optimized with different aspect ratios to create localized flow characteristics. The length is significantly greater than height to control flow direction, while width is significantly greater than height to distribute flow laterally, creating optimal local flow conditions that minimize noise and discomfort
2Ease of operation
If a patient interface is designed with complex features to improve fit and comfort, then patient compliance improves, but device complexity increases
Solution Approach 1:
The patient interface is designed to provide multiple functions through integrated components. The vent structure simultaneously achieves gas discharge, noise reduction, and comfort optimization. The tube portion with bend integrates positioning and comfort features, reducing the need for separate adjustment mechanisms and simplifying overall device complexity while improving compliance
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 vent system reduces noise and discomfort, improves patient compliance by enhancing fit and ease of use, and maintains therapeutic pressure, thereby optimizing treatment efficacy for respiratory disorders.
Implementation Method 1
The vent body may be configured such that, for each of the plurality of slots, the width is significantly greater than the height, and the length is significantly greater than the height
Implementation Method 2
A patient interface, allowing for a flow of breathable gas from a volume interior to the patient interface, may comprise a tube portion having a bend
Data Source
AI summary
The technology relates to a vent for a respiratory therapy system. The vent comprises a vent body having formed therein a plurality of slots allowing a vent flow of exhaled gases to ambient. The slots have a length, a width and a height. In examples the width of each slot is significantly greater than the height and the slots are arranged such that the widths of the slots extend in mutually parallel directions. The vent body may also be configured so that the length of each slot is significantly greater than the height and/or the outlet area is greater than the inlet area. In examples the vent is provided with a cover and an actuator to move the cover between a first position in which the cover at least partially occludes flow through the vent and a second position in which the degree of occlusion is reduced.