Cuff Pressure Adjusting Device with Segmented Gas Feeding
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Solution Overview
Problem
Conventional cuff pressure gauges for endotracheal tubes are cumbersome and lack safety features, making it difficult for users to accurately and quickly adjust cuff pressure, especially for inexperienced healthcare providers, and they do not have fail-safe mechanisms, which can lead to improper cuff pressure settings causing either leakage or mucosal damage.
Innovation Solution
A cuff pressure adjusting device with a gas feeding unit featuring an elastic hollow body that reduces volume upon pressing, a support member, a power supply unit, and a control unit that includes a solenoid valve for pressure control, display, and safety features like abnormality detection and automatic pressure release, enhancing user convenience and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional cuff pressure gauge with a large-volume squeeze bulb is used, then gas can be fed into the cuff, but the cuff pressure is excessively increased even with a single pressing manipulation
Solution Approach 1:
The gas feeding unit is divided into multiple small-volume chambers instead of using a single large-volume squeeze bulb. Each chamber contains a small amount of gas, allowing incremental pressure adjustment. When one chamber is pressed, it feeds a controlled small volume of gas to the cuff, preventing excessive pressure increase. This segmentation enables precise pressure control through multiple small adjustments rather than one large adjustment.
2Ease of operation
If a conventional cuff pressure gauge is used, then cuff pressure can be adjusted, but it takes time to acquire a feeling for proper manipulation and requires careful operation
Solution Approach 1:
The device incorporates a pressure detection unit that automatically monitors cuff pressure and provides feedback to the user. The system self-regulates by detecting when the desired pressure range is achieved and can automatically stop gas feeding or alert the user. This eliminates the need for the user to develop a tactile feel through repeated manual adjustments, making the device easy to use from the first operation while reducing the time needed to become proficient.
3Device complexity
If a conventional cuff pressure gauge without fail-safe measures is used, then the device is simpler, but improper cuff pressure settings can cause leakage or mucosal damage
Solution Approach 1:
The device includes a pressure detection unit that continuously monitors cuff pressure and provides real-time feedback. The detected pressure is compared against safe operational ranges, and the system automatically adjusts gas feeding to maintain pressure within safe limits. This feedback mechanism prevents both under-inflation (leakage) and over-inflation (mucosal damage) without requiring complex manual intervention, achieving safety through intelligent control rather than structural complexity.
4Measurement precision
If a syringe is used to inflate the cuff, then cuff pressure can be controlled, but it is difficult to rapidly and accurately perform fine adjustment of cuff pressure
Solution Approach 1:
The device transitions from a static syringe mechanism to a dynamic gas feeding system with multiple controllable chambers. The system can rapidly switch between different gas feeding chambers and adjust the volume of gas delivered in real-time based on current pressure readings. This dynamic control enables both rapid pressure increases (by opening multiple chambers) and precise fine adjustments (by controlling single chamber delivery), simultaneously improving adjustment speed and precision.
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 device allows for precise and rapid cuff pressure adjustments within recommended ranges, reducing the risk of excessive pressure and leakage, while providing safety features like automatic pressure release and abnormality detection, thus improving user safety and convenience.
Implementation Method 1
an elastic hollow body configured to be deformed so as to reduce an inner volume of the elastic hollow body with reception of the pressing manipulation
Data Source
AI summary
A cuff pressure adjusting device includes: a gas feeding unit which feeds a gas into a cuff by a pressing manipulation performed by a user; a cuff pressure detection unit which detects a pressure in the cuff; and a display unit which displays the pressure detected by the cuff pressure detection unit. The gas feeding unit includes: an elastic hollow body which is deformed so as to reduce an inner volume with reception of a pressing manipulation; and a support member which is disposed adjacently to the elastic hollow body in a direction along which the pressing manipulation is performed.