Theoretical R/I ratio | Ventilator | PEEP 5 cmH2O | PEEP 15 cmH2O | PEEP 15-to-5 | Calculated values | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
VTe (ml) | PPlat (cmH2O) | PEEPt (cmH2O) | VTe (ml) | PPlat (cmH2O) | PEEPt (cmH2O) | EELV (ml) | Vrec (ml) | R/I | Error in R/I | ||
0.0 | A | 428 | 14 | 5 | 412 | 23 | 15 | 921 | 33 | 0.07 | + 0.07 |
429 | 14 | 5 | 413 | 24 | 15 | 921 | 28 | 0.06 | + 0.06 | ||
B | 397 | 14 | 5 | 386 | 23 | 15 | 831 | 4 | 0.01 | + 0.01 | |
385 | 14 | 5 | 381 | 23 | 15 | 825 | 16 | 0.04 | + 0.04 | ||
C | 404 | 14.3 | 5.2 | 407 | 23.8 | 15.2 | 898 | 47 | 0.11 | + 0.11 | |
402 | 14.4 | 5.3 | 397 | 24.2 | 15.4 | 877 | 34 | 0.08 | + 0.08 | ||
D | 350 | 14.9 | 5.4 | 353 | 24.5 | 15.3 | 747 | 29 | 0.08 | + 0.08 | |
358 | 14.7 | 5.4 | 354 | 24.2 | 15.4 | 776 | 37 | 0.10 | + 0.10 | ||
E | 370 | 14 | 6 | 380 | 24 | 15 | 797 | 1 | 0.00 | + 0.00 | |
385 | 14 | 6 | 381 | 24 | 15 | 790 | − 24 | − 0.05 | − 0.05 | ||
0.5 | A | 420 | 14 | 5 | 419 | 21 | 15 | 1172 | 286 | 0.61 | + 0.11 |
429 | 14 | 5 | 414 | 21 | 15 | 1162 | 271 | 0.57 | + 0.07 | ||
B | 397 | 14 | 5 | 392 | 21 | 15 | 1060 | 227 | 0.51 | + 0.01 | |
385 | 14 | 5 | 384 | 21 | 15 | 1045 | 223 | 0.55 | + 0.05 | ||
C | 404 | 14.3 | 5.2 | 405 | 21.8 | 15.6 | 1144 | 277 | 0.60 | + 0.10 | |
402 | 14.4 | 5.3 | 398 | 21.0 | 15.1 | 1121 | 290 | 0.67 | + 0.17 | ||
D | 350 | 14.9 | 5.4 | 350 | 22.5 | 15.9 | 977 | 230 | 0.59 | + 0.09 | |
358 | 14.7 | 5.4 | 355 | 22.0 | 15.9 | 951 | 192 | 0.47 | − 0.03 | ||
E | 370 | 14 | 6 | 365 | 22 | 16 | 950 | 123 | 0.26 | − 0.24 | |
385 | 14 | 6 | 385 | 22 | 16 | 1010 | 144 | 0.30 | − 0.20 | ||
1.0 | A | 428 | 14 | 5 | 416 | 20 | 16 | 1408 | 471 | 0.90 | − 0.10 |
429 | 14 | 5 | 415 | 20 | 16 | 1406 | 467 | 0.89 | − 0.11 | ||
B | 397 | 14 | 5 | 393 | 20 | 15 | 1269 | 435 | 0.99 | − 0.01 | |
385 | 14 | 5 | 385 | 20 | 15 | 1258 | 445 | 1.04 | + 0.04 | ||
C | 404 | 14.3 | 5.2 | 397 | 20.4 | 15.9 | 1365 | 493 | 1.03 | + 0.03 | |
402 | 14.4 | 5.3 | 394 | 20.6 | 15.9 | 1322 | 460 | 0.98 | − 0.02 | ||
D | 350 | 14.9 | 5.4 | 353 | 22.1 | 16.4 | 1140 | 382 | 0.94 | − 0.06 | |
358 | 14.7 | 5.4 | 351 | 21.0 | 16.5 | 1137 | 359 | 0.84 | − 0.16 | ||
E | 370 | 14 | 6 | 387 | 21 | 16 | 1220 | 370 | 0.80 | − 0.20 | |
385 | 14 | 6 | 385 | 20 | 16 | 1220 | 353 | 0.73 | − 0.27 |