(1) Closed catheter insertion (no suction)¤ | |||||
PPEAK MA | PEEP MA | Vti | Vte | Vti - vte | |
ETT 9 before | 22 | 6 | 679 | 659 | 20 |
after | 21 | 6 | 583 | 569 | 14 |
ETT 8 before | 22 | 6 | 652 | 635 | 17 |
after | 20 | 6 | 470 | 461 | 9 |
ETT 7 before | 21 | 6 | 593 | 566 | 27 |
after | 18 | 7 | 393 | 376 | 17 |
(2) Closed catheter suctioning (moderate vs. maximum suction pressure)¤ | |||||
PPEAK MA | PEEP MA | Vti | Vte | Vti - Vte | |
ETT 9 mod | 20 | 6 | 765 | 331 | 434 |
max | 17 | 3 | 873 | 226 | 647 |
ETT 8 mod | 18 | 5 | 623 | 216 | 407 |
max | 14 | 3 | 660 | 83 | 577 |
ETT 7 mod | 15 | 4 | 492 | 136 | 356 |
max | 13 | 5 | 555 | 21 | 534 |
(3) Bronchoscopic suctioning (moderate vs. maximum suction pressure)¤ | |||||
PPEAK MA | PEEP MA | Vti | Vte | Vti - Vte | |
ETT 9 mod | 17 | 4 | 647 | 294 | 353 |
max | 16 | 4 | 724 | 166 | 558 |
ETT 8 mod | 15 | 4 | 513 | 177 | 336 |
max | 13 | 3 | 540 | 52 | 488 |
ETT 7 mod | 10 | 4 | 286 | 8 | 278 |
max | 3 | −5 | 389 | 0 | 389 |
(4) Effect of volume controlled ventilation (closed catheter system, mod. vs. max. suction pressure) | |||||
PPEAK MA | PEEP MA | Vti | Vte | Vti - Vte | |
ETT 9 mod | 16 | 5 | 503 | 150 | 353 |
max | 13 | 4 | 506 | 2 | 504 |
ETT 8 mod | 16 | 5 | 506 | 139 | 367 |
max | 11 | 3 | 514 | 0 | 514 |
ETT 7 mod | 16 | 5 | 507 | 144 | 363 |
max | 12 | 5 | 517 | 9 | 508 |
(5) Effect of volume controlled ventilation (bronchoscopic suction, mod. vs. max. suction pressure) | |||||
PPEAK MA | PEEP MA | Vti | Vte | Vti - Vte | |
ETT 9 mod | 15 | 4 | 507 | 185 | 322 |
max | 12 | 3 | 507 | 43 | 464 |
ETT 8 mod | 15 | 5 | 498 | 164 | 334 |
max | 13 | 5 | 510 | 13 | 497 |
ETT 7 mod | 17 | 4 | 499 | 185 | 314 |
max | 11 | 3 | 498 | 17 | 481 |