Influence of different electrode belt positions on electrical impedance tomography imaging of regional ventilation: a prospective observational study

Table 2 Respiratory parameters

	L1	L2	L3	L4	L5	L6	L7	P value
RR, 1/min	15.7 ± 3.6	15.5 ± 3.6	15.8 ± 3.8	15.7 ± 4.0	15.6 ± 3.7	15.9 ± 3.7	16.5 ± 3.9	n.s.
VT, ml	649 ± 134	637 ± 141	627 ± 138	621 ± 132	611 ± 125	639 ± 154	607 ± 122	n.s.
VT PBW, ml/kg	8.6 ± 1.8	8.3 ± 1.8	8.2 ± 1.9	8.1 ± 1.8	8.1 ± 1.8	8.3 ± 2.1	7.7 ± 1.5	n.s.
PEEP, mbar	8.0 ± 2.4	8.1 ± 2.3	8.1 ± 2.3	8.1 ± 2.3	8.1 ± 2.3	8.1 ± 2.5	7.8 ± 2.3	n.s.
PIP, mbar	20.7 ± 4.7	20.3 ± 4.7	20.2 ± 4.6	20.2 ± 4.6	20.2 ± 4.5	20.2 ± 4.8	18.5 ± 4.2	n.s.
C_res, ml/mbar	83.3 ± 43.3	81.1 ± 35.7	74.7 ± 25.7	74.8 ± 26.7	75.9 ± 28.1	78.4 ± 30.4	83.2 ± 35.9	n.s.

RR respiratory rate, n.s. not significant, VT tidal volume, PBW predicted body weight (males: PBW = 50 + 0.91 x (height in cm – 152.4), females: PBW = 45.5 + 0.91 x (height in cm – 152.4), PEEP positive end-expiratory pressure, PIP peak inspiratory pressure, C _res respiratory compliance. Data are mean ± standard deviation unless indicated otherwise. L1-L5: n = 15, L6: n = 12; L7: n = 8

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