Segmented Tracheal Tube Cuff for Airway Positioning
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Solution Overview
Problem
Current tracheal tubes with inflatable cuffs face challenges in maintaining proper positioning within the patient's airway, particularly when auxiliary devices are used, due to irregular inflation and lack of control over cuff placement, which can affect ventilation and imaging device compatibility.
Innovation Solution
The development of medical cuffs with segmented inflatable regions, allowing for independent inflation and deflation to control the positioning of tracheal tubes along the airway axis, accommodating various devices and ensuring proper alignment with the central axis of the trachea.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single inflatable cuff is used to seal the tracheal tube, then the sealing function is achieved, but the positioning control and alignment with the central axis are lost
Solution Approach 1:
The cuff is divided into multiple independently inflatable segments (first cuff segment, second cuff segment, etc.) that can be inflated separately. This segmentation allows selective inflation of specific segments to adjust the tracheal tube's position and alignment with the central axis, while maintaining the overall sealing function. Each segment can be controlled independently through separate inflation ports and control mechanisms.
2Reliability
If the cuff is made from thin and flexible material to ensure sealing, then the sealing effectiveness is improved, but the positioning stability and resistance to irregular inflation are reduced
Solution Approach 1:
By segmenting the cuff into multiple independent sections, the patent maintains the thin and flexible material properties for effective sealing in each segment while introducing structural control through the segmentation architecture. The segmented structure allows controlled inflation patterns that stabilize the overall cuff shape and prevent irregular inflation, even when using flexible materials.
Solution Approach 2:
Different segments of the cuff can have different inflation capacities and wall thicknesses tailored to local requirements. This allows specific segments to be optimized for sealing while others are optimized for positioning stability, creating local quality variations that resolve the contradiction between flexibility and stability.
3Adaptability or versatility
If the tracheal tube is positioned off-center due to irregular cuff inflation, then the sealing is maintained, but the compatibility with auxiliary devices and imaging devices is compromised
Solution Approach 1:
The cuff system transitions from a static, single-inflation structure to a dynamic, multi-segment system that can be inflated in different patterns. This dynamic control allows the cuff to adapt its inflation pattern based on the position of auxiliary devices or imaging equipment, enabling precise positioning adjustments to accommodate various device configurations while maintaining sealing effectiveness.
Solution Approach 2:
The patent changes the inflation parameters (volume, pressure, timing) of individual cuff segments to achieve different positioning outcomes. By controlling the inflation capacity and sequence of specific segments, the system can precisely adjust the tracheal tube's position to accommodate imaging devices or other auxiliary equipment, thereby improving positioning accuracy and device compatibility.
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 precise control over tracheal tube placement, facilitating better ventilation and visualization during medical procedures, even with dual-lumen endobronchial tubes, by allowing for customized inflation capacities and accommodating imaging devices within the airway.
Implementation Method 1
an inflatable cuff may be provided. When inflated, the cuff generally expands into the surrounding anatomy, for example, into the trachea to seal the tracheal passage around the tube
Data Source
AI summary
Various embodiments of tracheal tube assemblies disclosed herein may include a tubular body having an open distal end for ventilating a patient and a cuff disposed around the tubular body above the open distal end. The cuff may be adapted to be inflated to seal the cuff against a wall of a trachea of the patient. The cuff may include a first portion that spaces the tubular body a first distance from the tracheal wall when inflated and a second portion that spaces the tubular body a second distance from the tracheal wall when inflated. The second distance may be greater than the first distance.