Portable Manual Ventilation Device with Integrated Sensor Feedback
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Solution Overview
Problem
Conventional ventilation methods for patients undergoing sedation outside traditional operating rooms lack the ability to monitor ventilation quality, leading to potential inadequate ventilation and increased risk of hypoxia, especially in cases where anatomical airway anomalies or obesity complicates mask fitting, and there is no objective method to assess ventilation adequacy.
Innovation Solution
A portable, compact manual ventilation device with a closed breathing circuit incorporating a manually squeezable bag, carbon dioxide absorption canister, valves, and sensors to measure tidal volume, peak airway pressure, and end tidal carbon dioxide concentration, allowing for objective assessment of ventilation quality and prevention of over-inflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a bag-valve-mask is used for manual ventilation, then the device is simple and portable, but there is no ability to monitor ventilation quality and objective assessment is unavailable
Solution Approach 1:
The patent incorporates sensors that continuously monitor ventilation parameters (tidal volume, peak airway pressure, end-tidal CO2) and provide real-time feedback to the user through a display interface. This feedback mechanism enables objective assessment of ventilation quality while maintaining the manual operation simplicity of the bag-valve-mask design.
Solution Approach 2:
The patent introduces an intermediary monitoring system consisting of sensors, display interface, and optional alarm system. This intermediary layer bridges the simple manual ventilation device with sophisticated monitoring capabilities, allowing objective measurement and assessment without complicating the basic manual operation.
2Device complexity
If a bag-valve-mask is used without gauges, then the device remains simple and portable, but the risk of over-inflation and inadequate ventilation increases
Solution Approach 1:
The patent incorporates sensors that continuously monitor ventilation parameters (tidal volume, peak airway pressure, end-tidal CO2) and provide real-time feedback to the user through a display interface. This feedback mechanism enables objective assessment of ventilation quality while maintaining the manual operation simplicity of the bag-valve-mask design.
Solution Approach 2:
The patent includes an over-inflation protection valve that provides beforehand cushioning against the risk of over-inflation and barotrauma. This safety feature is built into the device architecture to prevent harmful effects before they occur, enhancing reliability without significantly increasing device complexity.
3Measurement precision
If a closed breathing circuit is used, then ventilation quality can be monitored, but the device size and infrastructure requirements increase
Solution Approach 1:
The patent divides the monitoring system into separate modular components: sensors integrated with the bag, a display interface, and an optional alarm system. This segmentation allows the monitoring capabilities to be added without requiring a complete redesign of the entire device, thereby controlling overall device size while maintaining full monitoring functionality.
Solution Approach 2:
The patent designs the monitoring system to serve multiple functions: measuring tidal volume, peak airway pressure, and end-tidal CO2 concentration, plus providing visual feedback and alarm capabilities. This multi-functionality consolidates what would otherwise require separate devices into a single integrated system, reducing overall infrastructure requirements.
4Device complexity
If experience and skill are relied upon to assess ventilation, then no additional equipment is needed, but inadequate ventilation can lead to hypoxia and brain death
Solution Approach 1:
The patent incorporates sensors that continuously monitor ventilation parameters (tidal volume, peak airway pressure, end-tidal CO2) and provide real-time feedback to the user through a display interface. This feedback mechanism enables objective assessment of ventilation quality while maintaining the manual operation simplicity of the bag-valve-mask design.
Solution Approach 2:
The patent replaces the purely mechanical/reliant approach (depending on operator skill and external signs) with an electronic sensing and display system. This substitution provides objective, quantifiable measurement of ventilation quality, eliminating the uncertainty inherent in relying solely on operator experience and visual assessment.
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 device ensures safe and efficacious manual ventilation by providing real-time monitoring of ventilation parameters, preventing hypoxia and barotrauma, and allowing for effective resuscitation in emergency situations, even in limited clinical settings.
Implementation Method 1
a carbon dioxide absorption canister
Data Source
AI summary
A portable, compact closed circuit ventilation device for manual ventilation of a patient undergoing a surgical or medical procedure that requires sedation as well as emergency management of respiratory failure. One example embodiment includes a closed breathing circuit having a manually squeezable bag, a carbon dioxide absorption canister, a plurality of valves, a gas port and a plurality of sensors for measuring Tidal Volume (TV), Peak Airway Pressure (PAP) and End Tidal CO2 (ETCO2). Another example embodiment includes an open breathing circuit having a bag, valves and sensors. A monitor displays the sensor measurements during the respiratory phases. In a spontaneously breathing patient the device may be used to assess the adequacy of patient's respiratory efforts. During manual or assisted ventilation, the monitor assures safe and efficacious ventilation by the closed breathing circuit.