Patient Interface Speech Valve for Clear Communication
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Solution Overview
Problem
Conventional patient interfaces used in respiratory therapy muffles voice communication due to positive air pressure, making it difficult for users to speak clearly, which can lead to reduced compliance and unintended alarms from therapy systems.
Innovation Solution
A patient interface with a user-actuatable speech valve that selectively opens a flow path from the breathing chamber to the atmosphere, allowing for clear vocal communication while maintaining respiratory therapy, featuring a vent with a sealing member that can be moved between occluded and open positions, and biased by internal pressure or mechanical means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a patient interface forms a seal to deliver positive pressure breathable gas, then respiratory therapy effectiveness is improved, but voice communication clarity deteriorates
Solution Approach 1:
The patient interface is segmented into separate functional zones: a first region for delivering pressurized breathable gas to the patient's airway, and a second region providing an open acoustic pathway for voice communication. This segmentation allows the sealing function and communication function to operate independently without interfering with each other, resolving the contradiction between therapy effectiveness and speech clarity.
2Quantity of substance
If a seal is formed around the mouth to maintain positive pressure, then gas retention is improved, but speech output quality deteriorates
Solution Approach 1:
Different regions of the patient interface are assigned different functional qualities: the first region is designed with sealing properties to retain pressurized gas, while the second region is designed with open acoustic properties to transmit speech sounds. This local differentiation of functional qualities allows gas retention and speech quality to be optimized simultaneously in their respective zones.
3Reliability
If the patient interface is sealed to prevent gas leakage, then therapy compliance is improved, but communication ease deteriorates
Solution Approach 1:
The interface structure is divided into a sealed first region for gas delivery that ensures therapy compliance, and an unsealed second region for communication that maintains ease of speech. This spatial segmentation resolves the contradiction by allowing both sealed and unsealed characteristics to coexist in different functional areas of the same device.
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 clear and easy communication during respiratory therapy without disrupting the therapy session, reducing user discomfort and system alarms by allowing pressurized air to escape when speaking, thus improving patient compliance.
Implementation Method 1
A patient interface with a user-actuatable speech valve that selectively opens a flow path from the breathing chamber to the atmosphere, allowing for clear vocal communication while maintaining respiratory therapy
Data Source
AI summary
A patient interface of a respiratory therapy system is provided, and includes a mask body, a mask seal secured to the mask body and configured to form a seal with the user's face, at least around the user's mouth. The mask body and mask seal are arranged to define an interior breathing chamber of the patient interface and an inlet to the breathing chamber configured to receive a flow of breathable gases into the breathing chamber. To assist in allowing a user to speak clearly whilst wearing or using the patient interface, a user actuatable speech valve is provided on the patient interface and is operable to selectively occlude and open a speech flow path from the breathing chamber to atmosphere when the user wishes to speak.