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. 2012 Oct;25(5):290–296. doi: 10.1089/jamp.2011.0920

Table 2.

The Distribution of Radiolabeled Particles After Delivery with Calfactant and Saline Aerosols

  Saline Surfactant p-value
Distribution at t=0
Whole lung (%) 100 100
Central lung (%) 42±5 42±4 0.94
Peripheral lung (%) 58±5 58±4 0.94
Central/peripheral ratio 0.73±0.16 0.72±0.11 0.89
Coefficient of Variation 1.03±0.17 1.08±0.24 0.62
Distribution at t=30 min
Whole lung (% ) 92±7 92±10 0.78
Central lung (% ) 37±8 41±5 0.08
Peripheral lung (% ) 55±6 51±8 0.26
Central/peripheral ratio 0.68±0.19 0.82±0.12 0.09
Coefficient of Variation 1.09±0.18 1.17±0.28 0.48
30-min change in:
Whole lung (%) −8±7 −8±10 0.78
Central lung (%) −5±7 0±2 0.12
Peripheral lung (%) −3±5 −8±8 0.29
Central/peripheral ratio −0.05±0.16 0.10±0.10 0.07
Coefficient of variation 0.06±0.06 0.09±0.08 0.57

Values at the beginning and end of a 30-min postdelivery imaging period are reported. Regional lung doses are expressed as a percentage of whole lung counts at the start of the imaging period. Wilcoxon matched-pairs signed-ranks test was used for comparisons. All mean±standard deviation.