Tracheostomy Inner Cannula With Integrated Helical Filter
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Solution Overview
Problem
Tracheostomy tubes bypass the natural air filtration and humidification mechanisms of the upper respiratory tract, exposing patients to airborne foreign matter, pathogens, and leading to discomfort, infection, and respiratory issues due to inhaling untreated air.
Innovation Solution
A tracheostomy tube inner cannula with an integrated helical filter that provides low resistance airflow while filtering contaminants, incorporating a helical airflow path that imparts centrifugal force on foreign matter and retains heat and moisture, eliminating the need for bulky external Heat Moisture Exchangers (HMEs) and reducing maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tracheostomy tube bypasses the upper respiratory tract, then airway patency is improved, but air filtration and humidification are compromised
Solution Approach 1:
The patent merges the filtration and humidification functions directly into the inner cannula structure by integrating a helical filter element that combines particulate filtration with heat and moisture exchange capabilities, eliminating the need for separate external HME devices while maintaining airway patency
Solution Approach 2:
The inner cannula is designed to perform multiple functions simultaneously: providing airway patency, filtering particulates, and exchanging heat and moisture, thereby consolidating several respiratory support functions into a single device that addresses both the improving and worsening features
2Object-affected harmful factors
If external HMEs are used for filtration and humidification, then air quality is improved, but device complexity and maintenance requirements increase
Solution Approach 1:
The patent integrates the filter element, humidification chamber, and airflow channel into a single inner cannula component, eliminating the need for separate external HME devices and reducing overall system complexity while maintaining improved air quality
Solution Approach 2:
The helical filter element is nested within the inner cannula lumen, with the filtration function embedded within the existing cannula structure rather than adding external components, thereby reducing device complexity
3Productivity
If a helical filter is integrated into the inner cannula, then airflow resistance is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent employs a helical or spiral-shaped filter element that wraps around the inner cannula lumen, creating a curved airflow path that reduces turbulence and resistance compared to straight filter designs, while the helical geometry can be efficiently manufactured using standard extrusion or forming processes
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 integrated filter effectively traps particulates and neutralizes pathogens, reducing airflow resistance and the risk of infection, while maintaining optimal humidity and temperature for respiratory comfort, thus addressing the limitations of external HMEs and cloth covers.
Implementation Method 1
The inner cannula includes a tapered segment and an integrated filter having a proximal filter diameter and a distal filter diameter, wherein the proximal filter diameter is greater than the distal filter diameter and the inner distal lumen diameter. The helical filter includes at least one spiral turn and a ramped filtering surface that wraps around a central axis.
Data Source
AI summary
Systems and methods for a tracheal tube inner cannula having an integrated filter are disclosed. In an example, the technology relates to a tracheal tube inner cannula that includes a proximal segment; a distal segment; a tapered segment attached to the proximal segment and the distal segment. The tapered segment includes a tapered lumen; and an integrated helical filter having a proximal filter diameter and a distal filter diameter, wherein the proximal filter diameter is greater than the distal filter diameter, the integrated helical filter having a ramped surface that wraps around a central axis at an angle such that the ramped surface extends distally through the integrated helical filter, the ramped surface including a coating to trap particulates as air flows through the integrated helical filter.