Volume-Adjustable Manual Ventilation Device With Pressure Feedback
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Solution Overview
Problem
Current manual ventilation devices are not suitable for monitoring and controlling tidal volume delivery, as they rely on tactile feedback, which can vary significantly among operators due to factors like hand size, technique, and fatigue, leading to potential underventilation or overventilation.
Innovation Solution
A manually operable ventilation device with a reservoir having movable walls that adjust to change the expressed maximum volume, incorporating size and frequency adjusters, and feedback mechanisms for consistent tidal volume and rate delivery, allowing for ergonomic operation with one hand and adjustable settings for different patients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a self-filling elastomeric bag is used for manual ventilation, then the device is simple and easy to operate, but the tidal volume delivery cannot be monitored or controlled precisely due to reliance on tactile feedback
Solution Approach 1:
The patent replaces the purely mechanical tactile feedback system with a pressure sensor-based electronic monitoring system. The pressure sensor detects airway pressure and provides objective feedback about tidal volume delivery, eliminating reliance on the operator's tactile sense while maintaining ease of operation.
Solution Approach 2:
The patent introduces feedback mechanisms including pressure sensors that monitor airway pressure and provide real-time information about ventilation delivery. This feedback allows the operator to adjust ventilation parameters to achieve precise tidal volume control while keeping the device easy to operate.
2Adaptability or versatility
If different sized bags are provided for infant, child and adult patients, then the maximum volumetric output can be matched to patient size, but the volume actually delivered varies substantially among operators due to hand size, technique and fatigue
Solution Approach 1:
The patent uses pressure sensors and feedback mechanisms to provide real-time information about the volume being delivered to the patient. This allows operators to adjust their technique and compensate for variations in hand size and fatigue, ensuring consistent and reliable volume delivery across different operators and patient sizes.
Solution Approach 2:
The patent replaces reliance on operator tactile feedback with electronic pressure sensing and monitoring systems. This substitution eliminates the variability introduced by different operators' hand sizes, techniques, and fatigue levels, ensuring consistent volume delivery while maintaining adaptability to different patient sizes.
3Quantity of substance
If a larger bag is used to provide greater maximum volume of air, then adult patients can be ventilated, but the device becomes harder to compress with one hand
Solution Approach 1:
The patent segments the ventilation delivery function into multiple components: a compliant reservoir for volume storage, rigid panels for structural support and compression leverage, and a mechanical advantage system. This segmentation allows the device to provide large maximum volumes while remaining easy to compress with one hand through the mechanical advantage mechanism.
Solution Approach 2:
The patent introduces rigid panels that move in multiple dimensions during compression, creating a mechanical advantage system. The panels can pivot and rotate, allowing the operator to compress a large-volume bag with one hand by leveraging forces across multiple dimensions rather than direct linear compression.
4Ease of operation
If rigid panels with mechanical advantage are used to enable one-hand compression, then ease of operation improves, but device complexity increases
Solution Approach 1:
The patent uses a compliant reservoir made of flexible material that can deform and store volume. This flexible shell works in conjunction with the rigid panels, allowing the device to maintain simplicity in the reservoir portion while the rigid panel mechanism provides the mechanical advantage for easy one-hand compression.
Solution Approach 2:
The patent employs dynamic rigid panels that can pivot, rotate, and change position during compression. These dynamic components adapt to the compression force applied by the operator's hand, providing mechanical advantage automatically without requiring complex control systems, thus improving ease of operation while limiting complexity growth.
Data Source
AI summary
Systems and methods for a manually operable volume-adjustable ventilation device. In some embodiments, the device includes a reservoir with an inlet mechanism, an outlet mechanism, and a volume adjuster configured to move a volume adjustment limit of the reservoir and change an expressed maximum volume of the reservoir. The reservoir may have a body comprising a plurality of movable walls defining an enclosed volume. The walls of the reservoir may be movable such that movement expresses the volume adjustment limit of the reservoir. In addition, the walls may be operably connected by movable structures such that two adjacent walls are be configured to rotate around substantially orthogonal axes with respect to each other when the reservoir moves from an uncompressed to a compressed state. Methods of ventilating a patient that involve the manually operable volume-adjustable ventilation device are also disclosed.