Combined Ventilation of Two Subjects with a Single Mechanical Ventilator Using a New Medical Device: An In Vitro Study

Table 1

Summary of the three stages, simulating the different possible combinations of subjects’ weights and lung compliances. The ventilator is configured in each mode to adequately ventilate the two subjects with a target volume of 7 ml/kg. The controllers of the DuplicAR^Ⓡ device are manipulated to deliver asymmetric flow or different PEEP to the subjects.

	Stage 1		Stage 2		Stage 3
	A	B	A	B	A	B
Weight (kg)	50	50	50	50	50	28
Compliance (ml/cm H2O)	30		30	20	30	10
Compliance (ml cm H2O^−1 kg^−1)	0.6		0.6	0.4	0.6	0.35
PEEP ventilator (cm H2O)	5		5		5
I : E ratio	1 : 2		1 : 2		1 : 2
Target volume (ml/kg)	7		7		7
Total target load (ml)	350	350	350	350	350	196
Peak pressure in PCV (cm H2O)	15		21		22
Tidal volume in VCV (ml)	700		700		546
DuplicAR flow manipulation	No	No	Yes	No	Yes	No
PEEP experiment I (cm H2O)	5		5		5
PEEP experiment II (cm H2O)	5	10	5	10	5	10
PEEP experiment III (cm H2O)	5	15	5	15	5	15