BVMR Volume Control Device with Range of Motion Limits
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Solution Overview
Problem
Current bag valve mask resuscitators (BVMRs) lack a precise mechanism to control the volume of air delivered to patients, leading to inconsistent ventilation, particularly during cardiac arrest or respiratory emergencies, as the volume administered is largely dependent on the operator's skill and anatomical variations are not accurately accounted for.
Innovation Solution
A range of motion control device with wing-like structures and a selector mechanism that anchors to the BVMR, allowing for adjustable volume delivery by limiting the range of motion and providing indicators for specific volume selection, ensuring accurate tidal volume administration based on patient size and condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If present day BVMRs have fixed volume capacities for different patient groups, then inventory can be reduced, but the user cannot accurately control the volume delivered to patients
Solution Approach 1:
The patent applies the dynamics principle by making the BVMR volume capacity adjustable rather than fixed. The device includes a mechanism that allows the user to change the bag's volume capacity during use, enabling adaptation to different patient sizes and requirements. This resolves the contradiction by providing both versatility (adjustable to different patients) and precision (controlled volume delivery) simultaneously.
Solution Approach 2:
The patent incorporates feedback mechanisms including visual indicators (such as colored zones or markings on the bag) that show the user the current volume capacity setting and how much volume has been delivered. This feedback allows the user to monitor and control volume delivery accurately, resolving the precision issue while maintaining adaptability through the adjustable mechanism.
2Device complexity
If BVMRs lack volume indicators, then the device structure remains simple, but the user cannot gauge the volume being expelled
Solution Approach 1:
The patent uses color changes or colored indicators on the BVMR bag to provide visual feedback about volume delivery. Different color zones or markings indicate different volume thresholds or delivery stages. This adds measurement capability without significantly increasing structural complexity, as the indicators are integrated into the bag itself rather than requiring separate measurement devices.
3Ease of operation
If the user must guesstimate when to stop compressing the bag, then no additional control mechanisms are needed, but volume delivery accuracy deteriorates
Solution Approach 1:
The patent provides real-time visual feedback to the user during the compression process, showing when the target volume has been reached. This eliminates the need for guesstimating while maintaining ease of operation, as the user simply needs to compress the bag until the visual indicator shows the target volume is reached, rather than needing to calculate or estimate the correct compression point.
4Measurement precision
If BVMRs are designed for specific patient groups only, then volume delivery can be optimized for that group, but the device cannot be used across different patient populations
Solution Approach 1:
The patent creates a universal BVMR that can be used across different patient populations (adults, children, infants) by making the volume capacity adjustable. The device performs multiple functions by accommodating various volume requirements through a single unit, eliminating the need for separate devices for different patient groups while maintaining optimized volume delivery for each population through adjustment.
Data Source
AI summary
A resuscitation bag (bag valve mask resuscitator or BVM or BVMR) or other similar ventilation device (for example: anesthesia bag) includes a structure that allows a selectable, and repeatable volume be delivered to patients. The reservoir of the BVMR is formed from elastic, gastight material in the form of an elongated hollow body, with an essentially circular cross section. A range of motion control (ROMC) structure controls, or selectively limits the range of motion or collapse of the elastic bag to limit or control the volume expelled from the bag to the patient.