Individualized mechanical ventilation in a shared ventilator setting: limits, safety and technical details.
- PDF / 1,716,108 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 0 Downloads / 194 Views
ORIGINAL RESEARCH
Individualized mechanical ventilation in a shared ventilator setting: limits, safety and technical details. Michiel Stiers1 · Matthias Mergeay2 · Hannah Pinson3 · Luc Janssen2 · Evy Voets2 · Harald De Cauwer4,5 · Tom Schepens6 Received: 29 April 2020 / Accepted: 21 September 2020 © Springer Nature B.V. 2020
Abstract The COVID-19 pandemic has resulted in an increased need for ventilators. The potential to ventilate more than one patient with a single ventilator, a so-called split ventilator setup, provides an emergency solution. Our hypothesis is that ventilation can be individualized by adding a flow restrictor to limit tidal volumes, add PEEP, titrate FiO2 and monitor ventilation. This way we could enhance optimization of patient safety and clinical applicability. We performed bench testing to test our hypothesis and identify limitations. We performed a bench testing in two test lungs: (1) determine lung compliance (2) determine volume, plateau pressure and PEEP, (3) illustrate individualization of airway pressures and tidal volume with a flow restrictor, (4a) illustrate that PEEP can be applied and individualized (4b) create and measure intrinsic PEEP (4c and d) determine PEEP as a function of flow restriction, (5) individualization of FiO2. The lung compliance varied between 13 and 27 mL/cmH2O. Set ventilator settings could be applied and measured. Extrinsic PEEP can be applied except for settings with a large expiratory time. Volume and pressure regulation is possible between 70 and 39% flow restrictor valve closure. Flow restriction in the tested circuit had no effect on the other circuit or on intrinsic PEEP. FiO2 could be modulated individually between 0.21 and 0.8 by gradually adjusting the additional flow, and minimal affecting F iO2 in the other circuit. Tidal volumes, PEEP and FiO2 can be individualized and monitored in a bench testing of a split ventilator. In vivo research is needed to further explore the clinical limitations and outcomes, making implementation possible as a last resort ventilation strategy. Keywords COVID-19 · ARDS · Bench testing · Individualized split ventilation
1 Introduction Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10877-020-00596-7) contains supplementary material, which is available to authorized users. * Michiel Stiers [email protected] 1
Department of Emergency Medicine, AZ St-Dimpna, J‑B Stessensstraat 2, 2440 Geel, Belgium
2
Department of Critical care Medicine and anesthesiology, AZ St-Dimpna, Geel, Belgium
3
Applied Physics/Data Analytics, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium
4
Department of Neurology, AZ St-Dimpna, Geel, Belgium
5
Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
6
Department of Critical Care Medicine, Antwerp University Hospital, University of Antwerp, Edegem, Belgium
The COVID-19 pandemic has resulted in an increased need for ventilators, as the amount of ventilated patients in some ar
Data Loading...
