Determinants and Prediction of Transport Ventilators' Oxygen Consumption.

This study investigates the determinants of oxygen consumption in transport ventilators, a critical factor for patient safety, especially during long-distance transfers and in resource-limited settings. A bench study was conducted on 4 ventilators to measure oxygen consumption under various ventilation settings. The main factor influencing oxygen consumption was the bias flow, a specific flow not contributing to patient ventilation.

A new reservoir-based CPAP with low oxygen consumption: the Bag-CPAP.

Background: Several noninvasive ventilatory supports rely in their design on high oxygen consumption which may precipitate oxygen shortage, as experienced during the COVID-19 pandemic. In this bench-to-bedside study, we assessed the performance of a new continuous positive airway pressure (CPAP) device integrating a large reservoir ("Bag-CPAP") designed to minimize oxygen consumption, and compared it with other CPAP devices.

Methods: First, a bench study compared the performances of Bag-CPAP and four CPAP devices with an intensive care unit ventilator.