Tracheostomy Cannula Tapered Section for Safe Tube Changes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tracheostomy cannulas often cause discomfort and complications during size adjustments or replacements, leading to the risk of secretions being aspirated into the lungs due to inadequate sealing and secretion bypass.
Innovation Solution
A tracheostomy cannula design featuring a tapered section near the distal end with a suction opening, allowing for safe cannula changes by preventing secretion aspiration through controlled cuff movement and sealing, and enabling the inner cannula to function as both a guide and ventilation conduit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional tracheostomy cannula is used for long-term ventilation, then the tube can maintain a seal against the trachea wall, but secretions accumulate in front of the cuff and can be aspirated into the lungs during cannula changes
Solution Approach 1:
The cannula is divided into multiple functional sections: a tapered section with reduced outer diameter for cuff accommodation, a main section with standard diameter for ventilation, and a suction opening positioned above the cuff. This segmentation allows simultaneous achievement of sealing, secretion drainage, and safe cannula replacement.
Solution Approach 2:
The suction opening is pre-positioned above the cuff to enable proactive secretion removal before cannula changes. The tapered section is pre-configured to allow cuff passage through the outer cannula during replacement, preventing secretion aspiration before it occurs.
2Object-affected harmful factors
If the tube outer diameter is reduced to avoid tracheal injuries, then patient safety improves, but the cuff sealing effectiveness may be compromised
Solution Approach 1:
The cannula features local quality variation with a tapered section having reduced outer diameter in the distal region for safety, while the proximal main section maintains standard diameter for adequate cuff sealing. This localized diameter adjustment resolves the contradiction between injury prevention and sealing effectiveness.
3Ease of operation
If a tapered section with reduced outer diameter is added to accommodate the cuff, then safe cannula changes are enabled, but the device complexity increases
Solution Approach 1:
The tapered section, suction opening, and cuff positioning are merged into a single integrated cannula design. This combination achieves safe cannula replacement and secretion drainage without requiring additional separate components, thereby reducing overall system complexity.
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 design ensures a safe and reliable change of cannulas by minimizing secretion aspiration and maintaining an uninterrupted seal during tracheostomy tube changes, reducing the risk of pneumonia and improving patient safety.
Implementation Method 1
The suction opening arranged proximally of the cuff is used to suction off any secretion that may collect proximally in front of the cuff
Implementation Method 2
the initially empty cuff is filled with gas (e.g. air) and inflated. As a result of the inflation, the cuff lies against the inner wall of the trachea and seals the tube against the inner wall of the trachea
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a tracheostomy cannula having a tube which comprises a proximal end having a proximal opening and a distal end having a distal opening and a cuff arranged on the outer circumference thereof close to the distal end. In order to provide a tracheostomy cannula which allows safe changing of the cannula and thereby reduces the risk of aspiration of secretion, the invention proposes that the tube comprises a tapered section of reduced external diameter near to its distal end, which section extends at least over the axial length of the cuff and has a smaller outside diameter than the tube in the main section located proximally therebefore, wherein preferably the length of the tapered section corresponds at least to the length of the cuff and is less than one third of the length of the tube, and wherein further preferably the proximal end of the cuff is spaced at a distance of at least two thirds of the tube length from the proximal end of the tube.