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Table 2 Inlet and outlet conditions for the flow simulations: The three sets of compliance values show the range of values considered in this study

From: A computational fluid dynamics assessment of 3D printed ventilator splitters and restrictors for differential multi-patient ventilation

Ventilator (Inlet) conditions

 Peak ventilator pressure

30 cmH2O

 Positive end-expiratory pressure

5 cmH2O

 Respiratory rate (default)

16 breaths min-1

 Pressure maximum time (default)

1.25 s

 Target end-inspiratory volume

0.480 L per patient

Simulated gas properties

 Gas constant

R = 265 J kg-1 K-1

 Gas specific heat capacity

936 J kg-1 K-1

 Kinematic viscosity

2.02 10-5 Pa ·s

Patient breathing circuit (Outlet) conditions

 Unrestricted (stiff lung) compliance

C = 0.02 / 0.04 / 0.10 L ·cmH2O-1

 Restricted (healthy lung) compliance

C = 0.04 / 0.08 / 0.20 L ·cmH2O-1

Patient lung and airway resistance

R inspiration

13 cmH2O / (L ·s-1)

R expiration

12 cmH2O / (L ·s-1)

Endotracheal tube and breathing circuit properties

Cbc

0.004 L ·s cmH2O-1

Rbc

22 cmH2O / (L s-1)