Deflated Cuff Continuous Flow Respiratory Support
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Solution Overview
Problem
Traditional mechanical ventilation methods that mimic spontaneous breathing cycles cause unwanted movement of the patient's diaphragm and lungs, which can be undesirable during medical procedures requiring stillness, and may not ensure adequate ventilation.
Innovation Solution
A method involving intubation with an invasive patient interface having a sealable member that can form a non-sealing arrangement within the airway, allowing for a controlled flow of respiratory gas without causing diaphragmatic or thoracic movement, by deflating the sealable member to create an exit flow path and controlling the flow rate and velocity of gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical ventilation mimics spontaneous breathing cycles, then ventilation is provided to the patient, but unwanted movement of the diaphragm and lungs occurs
Solution Approach 1:
Instead of using a sealed cuff to deliver positive pressure ventilation (traditional approach), the patent inverts the approach by using a deflated cuff that allows continuous flow ventilation. The cuff is maintained in a deflated state to create a non-sealing arrangement, enabling gas to flow continuously around the tube while providing ventilation without cyclic diaphragmatic movement.
Solution Approach 2:
The patent utilizes pneumatic principles by controlling the cuff inflation/deflation state to regulate gas flow. By maintaining the cuff in a deflated state, continuous pneumatic flow of respiratory gas is enabled around the endotracheal tube, providing ventilation through a non-sealing pneumatic interface rather than a sealed positive pressure system.
2Reliability
If a sealed cuff is used for mechanical ventilation, then adequate ventilation can be provided, but movement of the respiratory system occurs
Solution Approach 1:
The patent inverts the traditional sealed-cuff approach by deliberately maintaining the cuff in a deflated, non-sealing state. This inversion allows continuous gas flow around the tube to provide ventilation while eliminating the cyclic pressure changes that cause respiratory system movement, thereby achieving both ventilation adequacy and respiratory stillness.
Solution Approach 2:
The patent implements continuous gas flow ventilation instead of cyclic ventilation. By maintaining a constant flow of respiratory gas around the deflated cuff, the system provides continuous useful action for gas exchange without the intermittent pressure surges that disrupt respiratory system stability and cause unwanted movement.
3Stability of the object's composition
If the sealable member is deflated to create a non-sealing arrangement, then respiratory stillness is maintained, but CO2 clearance must be ensured through controlled flow
Solution Approach 1:
The patent incorporates feedback mechanisms to monitor and adjust the continuous gas flow rate. By measuring parameters such as flow rate, pressure, and potentially CO2 levels, the system provides feedback control to ensure adequate CO2 clearance is maintained while preserving the deflated cuff configuration and respiratory stillness required for surgical procedures.
Solution Approach 2:
The patent utilizes parameter changes in the continuous gas flow (flow rate, pressure, composition) to optimize CO2 clearance. By adjusting these parameters of the continuous flow around the deflated cuff, the system ensures adequate ventilation and CO2 elimination while maintaining the stable, non-sealing configuration that prevents respiratory movement.
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 improves CO2 clearance and maintains respiratory stillness, reducing the risk of movement and ensuring adequate ventilation during medical procedures, thereby enhancing the safety and effectiveness of procedures by maintaining a prolonged period of apnoea with improved gas exchange.
Implementation Method 1
providing a continuous flow of respiratory gas to the patient via the invasive patient interface
Implementation Method 2
operating the sealable member to form a non-sealing arrangement of the invasive patient interface within the patient's airway... providing a flow of respiratory gas to the patient via the invasive patient interface
Data Source
AI summary
A method for providing respiratory support to a patient includes intubating the patient with an invasive patient interface having a sealable member operable to form a sealing engagement with the patient's airway. While the patient is intubated, the sealable member is operated to form a non-sealing arrangement of the invasive patient interface within the patient's airway and a flow of respiratory gas is provided to the patient via the invasive patient interface. This respiratory support is provided during absence of spontaneous breathing.