Computed tomographic assessment of lung weights in trauma patients with early posttraumatic lung dysfunction

Table 2 Lung volumes and weights quantified by CT^a

Parameter	ALI	Reference ventilated	Reference spontaneous
Median V_lung^b, ml	3,208 (2,574 to 4,289)	4,228 (3,701 to 4,621)	3,195 (2,670 to 4,918)
Median V_lung in women^b, ml	2,865 (2,413 to 3,293)	3,498 (2,957 to 3,948)	2779 (2,526 to 3,878)
Median V_lung in men^b, ml	3,304 (2,562 to 4,513)	4,426 (3,801 to 4,760)	3363 (2,979 to 6,121)
Median M_lung^c, g	1,088 (862 to 1,342)	893 (785 to 968)^d	884 (724 to 986)^d,e
Median M_lung in women, g	814 (748 to 1,250)	738 (664 to 765)	720 (620 to 824)
Median M_lung in men, g	1,119 (913 to 1,358)	902 (847 to 981)	928 (864 to 993)
Median M_hyper^b, %	0 (0 to 3)	2 (0 to 4)	0 (0 to 4)
Median M_normal^b, %	55 (39 to 68)	88 (85 to 91)	85 (79 to 88)
Median M_poor^b, %	17 (14 to 23)	6 (6 to 10)	9 (7 to 17)
Median M_non^b, %	20 (11 to 34)	1 (1 to 2)	1 (1 to 2)

^aAll values are given as medians with interquartile ranges. ALI, patients with acute lung injury already at admission; reference ventilated, mechanically ventilated patients with normal lungs; reference spontaneous, spontaneously breathing patients with normal lungs; V_lung, total lung volume; M_lung, total lung mass; M_hyper, mass of hyperaerated lung compartment; M_normal, mass of normally aerated lung compartment; M_poor, mass of poorly aerated lung compartment; M_non, mass of nonaerated lung compartment. The weights of differently aerated lung compartments were calculated as percentages of M_lung. V_lung and M_lung values were calculated for each sex separately as well as for all patients in a group to assess sex-specific differences. ^bBecause the degree of inspiration was not controlled during computed tomography, between-group comparison of V_lung and differently aerated lung compartments was omitted. ^cP < 0.001 for the Kruskal-Wallis test over all groups; ^dP < 0.001 versus ALI; ^eP = 0.74 versus reference ventilated.

ISSN: 1364-8535