Table 2.

Red and green latex particle pixel counts in confocal images of lungs ventilated with negative and positive pressures.

Ventilation pressure and particle color	Each confocal image area occupied by latex particle pixels (%)	Pixel clumps per confocal image (n)	Pixels in each pixel clump (n)*	Pearson red-green pixel co-localization coefficient
Negative pressure, green particles	3.95 ± 1.26	2174 ± 597†	4.77 ± 1.07†	Negative pressure ventilation
Negative pressure, red particles	4.10 ± 0.95	2523 ± 682‡	4.22 ± 1.17‡	0.20 ± 0.03§
Positive pressure, green particles	4.88 ± 1.92	1222 ± 369	10.32 ± 2.93	Positive pressure ventilation
Positive pressure, red particles	4.95 ± 2.32	1435 ± 179	8.79 ± 3.90	0.40 ± 0.05

Values are presented as mean ± s.d.

^*4.3 pixels per latex particle.

^†Signficantly different from positive pressure green.

^‡Signficantly different from positive pressure red.

^§Significantly different from positive pressure ventilation.