Intubation Device with Dual Seals for Backflow Pressure Control
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Solution Overview
Problem
Current intubation devices face challenges in preventing leakage of contaminated fluids into the lungs, leading to Ventilator Associated Pneumonia (VAP) due to limitations in cuff pressure and seal effectiveness, which restricts the ability to maintain an optimal seal without causing tracheal tissue damage.
Innovation Solution
The implementation of an intubation device with multiple seals and a system to independently set pressure differences between the proximal and distal sides of the most proximal seal, using continuous pressurizers to maintain a reverse pressure gradient across the seals, allowing for reduced leakage and infection risk without exceeding safe cuff pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cuff pressure is increased to improve seal effectiveness and prevent leakage of contaminated fluids, then seal effectiveness is improved, but tracheal tissue damage occurs
Solution Approach 1:
The invention divides the single cuff into two separate cuffs: a first cuff positioned distally in the trachea and a second cuff positioned proximally. This segmentation allows independent pressure control of each cuff, enabling the distal cuff to maintain seal effectiveness while the proximal cuff manages backflow pressure to prevent tissue damage from excessive pressure accumulation.
Solution Approach 2:
The invention introduces dynamic pressure management by providing separate inflation control for each cuff. The system can independently adjust the pressure in the first and second cuffs based on real-time conditions, allowing optimization of seal effectiveness while preventing harmful pressure buildup that could damage tracheal tissue.
2Device complexity
If a single seal is used to simplify device structure, then device complexity is reduced, but leakage prevention capability is insufficient
Solution Approach 1:
The invention segments the sealing function into two distinct cuffs positioned at different locations along the tube. The first cuff provides primary sealing at the distal position, while the second cuff provides additional sealing and backflow management at the proximal position. This segmentation enhances leakage prevention capability without requiring complex single-seal mechanisms.
Solution Approach 2:
The second cuff acts as an intermediary element between the external environment and the first cuff. It manages backflow pressure and prevents contaminated fluids from accumulating and forcing their way past the first cuff, thereby enhancing the overall leakage prevention capability of the system.
3Object-affected harmful factors
If cuff pressure is limited to safe levels to prevent tissue damage, then patient safety is improved, but seal effectiveness is reduced leading to leakage
Solution Approach 1:
By segmenting the sealing function into two cuffs with independent pressure control, the system can maintain the first cuff at a pressure sufficient for effective sealing while keeping the second cuff at a lower, safer pressure level. This segmentation allows the system to achieve both adequate seal effectiveness and patient safety simultaneously.
Solution Approach 2:
The second cuff serves as a pressure management intermediary that prevents backflow of contaminated fluids without requiring excessive pressure. It manages the pressure gradient to ensure that even when the first cuff is inflated to effective sealing pressures, contaminated fluids cannot force their way past the seal, thereby maintaining both seal effectiveness and patient safety.
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
This approach effectively reduces the leakage of contaminated fluids and associated infections by maintaining a controlled pressure gradient, enhancing patient safety and reducing the risk of VAP while minimizing tracheal mucosa damage.
Implementation Method 1
maintain a reverse pressure gradient across the seals
Implementation Method 2
preventing backflow of contaminated fluids
Data Source
AI summary
Intubation devices, systems, and methods in which the risk of leakage of nasopharyngeal secretions, esophageal reflux, and blood is reduced, or eliminated, by means of a backflow pressure gradient that is independent of PEEP. Contemplated configurations include (a) a flexible tube for the controlled delivery of air and other gases to the lungs, (b) distal and proximal inflatable seals that can close the annular space surrounding the tube, (c) means to inflate the seals, and (d) means to deliver gas under pressure to the annular chamber in between the two seals. Further configurations further comprise a processor and sensors, and methods are provided for automated backflow of contaminated fluids.