Tracheal Coupling Flow Restriction for High-Flow PEEP
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Solution Overview
Problem
Existing tracheal couplings fail to provide sufficient positive end-expiratory pressure (PEEP) in high flow therapy scenarios, leading to inadequate airway support and gas exchange in spontaneously breathing patients.
Innovation Solution
The tracheal coupling incorporates a flow restriction mechanism, such as an adjustable orifice or turbulence-generating nozzle, to create PEEP by controlling expiratory flow, enhancing pressure support and gas exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If existing tracheal couplings are used in high flow therapy, then gas supply is provided to spontaneously breathing patients, but sufficient positive end-expiratory pressure (PEEP) is not generated, leading to inadequate airway support
Solution Approach 1:
The connector modifies the flow parameters by introducing a flow restriction that changes the pressure characteristics of the gas flow. This restriction creates back pressure during expiration, transforming the pressure profile to generate sufficient PEEP while maintaining high flow capability
Solution Approach 2:
The invention uses pneumatic principles by incorporating a flow restriction mechanism that utilizes gas flow dynamics to generate pressure. The restriction creates turbulence and back pressure that translates kinetic energy of the gas flow into potential energy (PEEP)
2Reliability
If flow restriction is introduced to generate PEEP, then airway support and gas exchange are improved, but device complexity increases due to additional components like adjustable orifices or nozzles
Solution Approach 1:
The flow restriction mechanism is merged with the connector body itself, integrating the PEEP-generating function into the existing structure. The restriction can be implemented as an integrated nozzle or orifice within the connector housing, eliminating the need for separate components
Solution Approach 2:
The connector is designed to perform multiple functions: gas delivery, flow restriction for PEEP generation, and potential adjustability. This multi-functionality reduces the need for additional specialized components while achieving the therapeutic goal
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 solution effectively generates PEEP, improving airway stability, gas exchange, and reducing lung stiffness, benefiting patients with obstructive lung diseases and heart failure.
Implementation Method 1
the flow restriction is caused by turbulence from inlet flow
Implementation Method 2
the flow restriction is caused by jetting air from inlet flow
Data Source
AI summary
The present invention relates to a tracheal coupling comprising a patient port 33, an outlet port 36, an inlet port 31 between the patient port and the outlet port, such that flow 34 from the inlet port can go to the patient port or direct to the outlet port, and a flow restriction e.g. 32 between the inlet port and the outlet port, or at the outlet port.