2 results about "Inspiratory Capacity" patented technology

A method for determining rebreathed gas fractions in a respiratory gas supply system using specific respiratory or ventilation parameters, wherein the expiratory flow and the leakage flow are recorded during a respiratory cycle, the expiratory and leakage volumes resulting from the integration of these two flows are determined, and the rebreathing fraction (VR) is determined as the difference between the expiratory volume and the leakage volume (VR = VE - VL), and an alarm is generated if a critical value for the determined FiCO2 is exceeded or if VR > 0, characterized in that, if VR > 0, the fraction of CO2 in the subsequent inspiration that is formed at the end of inspiration by the mixing of rebreathed air with fresh air in relation to the total inspired volume in the lungs (FiCO2) is estimated, and wherein the estimation of FiCO2 is carried out taking into account anatomical dead spaces.

This invention discloses a system and method for monitoring the remaining duration of a compressed oxygen respirator. It constructs a dynamic oxygen consumption calculation model by real-time collection of physiological parameters such as firefighters' breathing rate, expiratory volume, inspiratory volume, and exhaled carbon dioxide content, combined with equipment operating parameters such as cylinder replenishment pressure changes, replenishment rate, airbag capacity, and replenishment time. This method calculates real-time oxygen consumption based on the oxygen consumption per breath and breathing rate, and calculates the remaining protection time of the compressed oxygen respirator by comparing the relationship between replenishment rate and real-time oxygen consumption, categorized by mode. Furthermore, this invention provides a monitoring system integrating physiological data collection, environmental monitoring, core processing, and early warning feedback. By integrating multi-source information, dynamically adapting to changes in firefighters' workload, and conforming to the actual workflow of the compressed oxygen respirator, this invention significantly improves the accuracy and real-time performance of remaining duration prediction, providing reliable data support for safe operations and command decisions by firefighters.