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Table 4 Regional variables derived from CT scans

From: Effects of regional perfusion block in healthy and injured lungs

 

Lung

4

5

p value

Apical

+

intermediate regions

(70%)

Weight (g)

L

317 ± 158

403 ± 38

0.344

R

440 ± 136*

657 ± 42*$

0.03

Normally aerated (%)

L

28 ± 14

24 ± 6

0.571

R

36 ± 14*

16 ± 6*$

0.042

Poorly aerated (%)

L

37 ± 11

35 ± 7.2

0.741

R

35 ± 10

29 ± 10

0.426

Non-aerated (%)

L

33 ± 11

40 ± 13

0.445

R

27 ± 11

54 ± 14*$

0.039

Gas/tissue ratio

L

1.0 ± 0.6

0.8 ± 0.2

0.52

R

1.3 ± 0.6*

0.6 ± 0.2

0.084

Basal region

(30%)

Weight (g)

L

168 ± 49

95 ± 10*$

0.038

R

141 ± 92

120 ± 12

0.676

Normally aerated (%)

L

17 ± 12

55 ± 8*$

0.001

R

47 ± 19

10 ± 9$

0.013

Poorly aerated (%)

L

40 ± 10

32 ± 6

0.197

R

31 ± 9

29 ± 17

0.901

Non-aerated (%)

L

42 ± 15

12 ± 7*$

0.013

R

42 ± 57

72 ± 30

0.065

Gas/tissue ratio

L

0.6 ± 0.3*

1.7 ± 0.5*$

0.031

R

1.6 ± 0.9

0.3 ± 0.3

0.05

  1. Data are reported as mean ± standard deviation. Variables describe the upper 70% (apical + intermediate) and the lower 30% (basal) regions
  2. Group 4 lung lavage, high V T ventilation plus the right lower lobe perfusion block; group 5, lung lavage, high V T ventilation plus the left lower lobe perfusion block; R and L refer to the right and left lungs, respectively
  3. * p < 0.05 comparison of the left to right lungs within the same group
  4. $ p < 0.05 comparison between groups 4 and 5