Sizing the lung of mechanically ventilated patients

Table 2 Respiratory system volumes and pressures

Patient	TLC, liters	TLC, percentage of predicted	Vrel, liters	IC, liters	IC-ICex, mL	Pplat, cm H ₂ O	ERS, cm H ₂ O/liter
1	2.30	0.35	0.77	1.52	48	29	51
2	2.31	0.50	1.18	1.13	78	25	79
3	6.47	1.01	3.32	3.14	126	11	18
4	4.63	0.60	2.54	2.09	^a	12	24
5	2.38	0.44	1.11	1.27	^a	19	29
6	4.05	0.79	2.15	1.90	84	14	26
7	2.26	0.54	1.14	1.11	106	30	63
8	3.77	0.62	1.87	1.90	40	20	29
9	1.67	0.43	0.69	0.99	77	22	50
10	1.53	0.29	0.33	1.20	169	18	22
11	3.51	0.55	1.48	2.03	220	21	27
12	3.52	0.54	2.15	1.36	125	18	29
13	6.23	1.08	2.52	3.71	340	12	13
14	3.23	0.57	1.06	2.17	210	20	26
Mean ± SD	3.42 ± 1.54	0.59 ± 0.23	1.59 ± 0.85	1.82 ± 0.80	135 ± 0.87	19 ± 6	35 ± 19

^aMissing paired inflation and exhaled volume data. ERS, elastance of the relaxed respiratory system; IC, inspiratory capacity; ICex, exhaled volume from total lung capacity; Pplat, plateau airway pressure; SD, standard deviation; TLC, total lung capacity; Vrel, lung volume at relaxed end-expiration.

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