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Table 1 Shows total particle count for the different particle sizes from 1 to 8 during in vivo ventilation.

From: A new way of monitoring mechanical ventilation by measurement of particle flow from the airways using Pexa method in vivo and during ex vivo lung perfusion in DCD lung transplantation

  In vivo
VCV versus PVC Small tidal volumes versus large tidal volumes Low PEEP versus high PEEP
VCV1 PCV1 p value VCV2 p value PCV2 PCV3 p value
Particle 1 1650 ± 277 11,543 ± 3044 0.02* 6300 ± 1197 0.003** 18,428 ± 3044 15,387 ± 2350 n.s.
Particle 2 992 ± 208 7521 ± 2099 0.03* 4238 ± 793 0.002** 12,580 ± 1288 10,743 ± 1983 n.s.
Particle 3 1683 ± 286 10,455 ± 2481 0.06 4948 ± 918 0.009** 15,125 ± 2069 15,245 ± 1937 n.s.
Particle 4 1233 ± 159 7208 ± 651 0.01* 4130 ± 955 0.019* 6066 ± 1299 10,003 ± 2331 n.s.
Particle 5 138 ± 28 3025 ± 437 0.02* 1345 ± 390 0.029* 3890 ± 1944 3025 ± 1151 n.s.
Particle 6 350 ± 32 3766 ± 476 0.01* 1552 ± 370 0.028* 4245 ± 1461 3570 ± 1029 n.s.
Particle 7 175 ± 56 2018 ± 259 0.01* 1255 ± 451 0.046* 2137 ± 762 1723 ± 735 0.008*
Particle 8 92 ± 20 2293 ± 376 0.02* 1053 ± 485 n.s. 2133 ± 1059 1426 ± 687 n.s.
  1. VCV1 volume-controlled ventilation with small tidal volumes and PEEP at 2, VCV2 volume-controlled ventilation with large tidal volumes and PEEP at 2, PCV1 pressure-controlled ventilation with small tidal volumes and PEEP at 2, PCV2 pressure-controlled ventilation with large tidal volumes and PEEP at 2, PCV3 pressure-controlled ventilation with big tidal volumes and PEEP at 10
  2. Significance was defined as: p < 0.01 (**), p < 0.05 (*), and p > 0.05 (not significant, n.s.)