Table 1.
Tidal volume values in the volume-controlled ventilation and pressure-controlled ventilation modes for all the ventilators and simulated scenarios
| VCV mode Ventilators ICU | VT (mL) | PCV mode | VT (mL) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Patient effort | No effort* | Pmus-5cmH2O | Pmus-5cmH2O/+5cmH2O | No effort* | Pmus-5cmH2O | Pmus-5cmH2O/+5cmH2O | ||||||
| Ventilator RR | zero | 15 | 25 | 15 | 25 | zero | 15 | 25 | 15 | 25 | ||
| SERVO I | Maximum | 413 (-7) | 440 (+20) | 443 (+23) | 417 (-3) | 526 (+106) | SERVO I | 418 (-2) | 439 (+19) | 483 (-63) | 421 (+1) | 546 (+126) |
| Median | 413 (-7) | 440 (+20) | 416 (-4) | 417 (-3) | 499 (+79) | 418 (-2) | 439 (+19) | 422 (+2) | 421 (+1) | 481 (+61) | ||
| Minimum | 413 (-7) | 440 (+20) | 409 (-11) | 417 (-3) | 440 (+20) | 418 (-2) | 439 (+19) | 413 (-7) | 421 (+1) | 476 (+56) | ||
| ESPRIT | Maximum | 353 (-67) | 358 (-62) | 392 (-28) | 362 (-58) | 461 (+41) | ESPRIT | 353 (-67) | 419 (-1) | 422 (+2) | 424 (+4) | 508 (+88) |
| Median | 353 (-67) | 358 (-62) | 363 (-57) | 362 (-58) | 413 (-7) | 353 (-67) | 419 (-1) | 345 (-75) | 424 (+4) | 444 (+24) | ||
| Minimum | 353 (-67) | 358 (-62) | 356 (-64) | 362 (-58) | 367 (-53) | 353 (-67) | 419 (-1) | 341 (79) | 424 (+4) | 430 (+10) | ||
| DX 3012 | Maximum | 379 (-41) | 387 (-33) | 422 (+2) | 370 (-50) | 406 (-14) | DX 3012 | 418 (-2) | 434 (+14) | 476 (+56) | 417 (-3) | 490 (+70) |
| Median | 379 (-41) | 387 (-33) | 407 (-13) | 370 (-50) | 392 (-28) | 418 (-2) | 434 (+14) | 429 (+9) | 417 (-3) | 445 (-25) | ||
| Minimum | 379 (-41) | 387 (-33) | 394 (-26) | 370 (-50) | 370 (-50) | 418 (-2) | 434 (+14) | 418 (-2) | 417 (-3) | 438 (+18) | ||
| PB 840 | Maximum | 382 (-38) | 386 (-34) | 416 (-4) | 392 (-28) | 474 (+54) | PB 840 | 382 (-38) | 385 (-35) | 424 (+4) | 393 (-27) | 536 (+116) |
| Median | 382 (-38) | 386 (-34) | 393 (-27) | 392 (-28) | 449 (+29) | 382 (-38) | 385 (-35) | 371 (-49) | 393 (-27) | 467 (+47) | ||
| Minimum | 382 (-38) | 386 (-34) | 378 (-42) | 392 (-28) | 398 (-22) | 382 (-38) | 385 (-35) | 363 (-57) | 393 (-27) | 448 (+28) | ||
| SAVINA | Maximum | 381 (-39) | 421 (+1) | 421 (+1) | 389 (-31) | 463 (+43) | SAVINA | 411 (-9) | 414 (-6) | 428 (+8) | 382 (-38) | 459 (+39) |
| Median | 381 (-39) | 421 (+1) | 388 (-32) | 389 (-31) | 402 (-18) | 411 (-9) | 414 (-6) | 389 (-31) | 382 (-38) | 404 (-16) | ||
| Minimum | 381 (-39) | 421 (+1) | 367 (-53) | 389 (-31) | 400 (-20) | 411 (-9) | 414 (-6) | 372 (-48) | 382 (-38) | 398 (-22) | ||
| SAVINA AF | Maximum | 461 (+41) | 450 (+30) | 508 (+88) | 452 (+32) | 556 (+136) | - | - | - | - | - | |
| Median | 461 (+41) | 450 (+30) | 479 (+59) | 452 (+32) | 479 (+59) | |||||||
| Minimum | 461 (+41) | 450 (+30) | 430 (+10) | 452 (+32) | 468 (+48) | |||||||
VT - tidal volume; VCV - volume-controlled ventilation; ICU - intensive care unit; RR - respiratory rate; Pmus - muscle pressure; PCV - pressure-controlled ventilation.
*
Absence of muscle effort: Pmus = zero. Inspiratory effort: Pmus =-5cmH2O, Expiratory effort: Pmus = +5cmH2O. The spontaneous respiratory rate of the patient was set at 20bpm, and the target tidal volume was set at 420mL. In parentheses is the difference between the programmed tidal volume and the observed tidal volume.