When Resources Are Scarce - Feasibility of Emergency Ventilation of Two Patients With One Ventilator

Peter C. Reinacher; Thomas E. Schlaepfer; Martin A. Schick; Juergen Beck; Hartmut Buerkle; Stefan Schumann

The copyright holder for this preprint . https://doi.org/10.1101/2020.04.10.20060525 doi: medRxiv preprint pressure was only adjustable in steps of 1 cmH2O a certain variety of tidal volume in dependency of the respective compliance combination was inevitable. For an additional measurement using external sensors pneumotachographs (Fleisch2, Dr Fenyves & Gut, Hechingen) were placed between the breathing circuits' outlets and the tracheal tube. The pressures inside the lung models were measured via piezoresistive pressure sensors (Transmittermodul Typ 4, SI-special instruments GmbH, Nördlingen, Germany). After a measurement sequence of at least 8 complete breaths one patient model was disconnected from the ventilator via pinching off the tracheal tube of one patient using a surgical clamp of which the jaws were coated with a silicone tube to prevent from damaging the tracheal tube. A repeated sequence of at least 8 complete breaths was recorded. The clip was removed and another measurement was performed with the tracheal tube of the other patient model pinched off.