Table 3.
Mean conduit flow rate at Input Pressure of 10 mmHg and 25 mmHg when R, R4/L, R5/L, and R6/L are held constant (no air-trap).
| Conduit length (mm) | Initial radius (mm) | Constant radius flow (cc/min) | Constant R4/L flow (cc/min) (% improvement) | Constant R5/L flow (cc/min) (% improvement) | Constant R6/L flow (cc/min) (% improvement) |
|---|---|---|---|---|---|
| Input pressure = 10 mmHg | |||||
| 160 | 2 | 71 | 188 (+ 165%)**** | – | – |
| 3 | 251 | 349 (+ 39%)** | – | – | |
| 4 | 368 | 435 (+ 18%)** | – | – | |
| 5 | 458 | 492 (+ 7%) | – | – | |
| 310 | 2 | 81 | 294 (+ 263%)**** | 216 (+ 167%)**** | 247 (+ 205%)**** |
| 3 | 294 | 406 (+ 38%)*** | 321 (+ 9%) | 308 (+ 5%) | |
| 4 | 373 | 411 (+ 10%) | 387 (+ 4%) | 369 (− 1%) | |
| 5 | 428 | 489 (+ 14%)*** | 428 (0%) | 383 (− 11%) | |
| 620 | 2 | 26 | 166 (+ 538%)**** | 154 (+ 492%)*** | 129 (+ 396%)*** |
| 3 | 122 | 253 (+ 107%)*** | 249 (+ 104%)*** | 240 (+ 97%)** | |
| 4 | 149 | 310 (+ 108%)*** | 275 (+ 85%)*** | 256 (+ 72%)**** | |
| 5 | 240 | 352 (+ 47%)** | 327 (+ 36%) ** | 320 (+ 33%)* | |
| Input pressure = 25 mmHg | |||||
| 160 | 2 | 169 | 398 (+ 136%)**** | – | – |
| 3 | 478 | 628 (+ 31%)*** | – | – | |
| 4 | 513 | 636 (+ 24%)** | – | – | |
| 5 | 550 | 637 (+ 16%)** | – | – | |
| 310 | 2 | 157 | 427 (+ 172%)**** | 301 (+ 92%)** | 285 (+ 82%)* |
| 3 | 401 | 512 (+ 28%)** | 377 (− 6%) | 386 (− 4%) | |
| 4 | 475 | 575 (+ 21%)* | 447 (− 6%) | 487 (+ 3%)* | |
| 5 | 549 | 662 (+ 21%)*** | 491 (− 11%)* | 520 (− 5%)**** | |
| 620 | 2 | 68 | 451 (+ 563%)**** | 364 (+ 435%)**** | 301 (+ 343%) |
| 3 | 267 | 520 (+ 95%)**** | 476 (+ 78%)**** | 433 (+ 62%)** | |
| 4 | 403 | 551 (+ 37%)**** | 504 (+ 25%)** | 509 (+ 26%)**** | |
| 5 | 503 | 632 (+ 26%)** | 592 (+ 18%)*** | 522 (+ 4%) | |
*P < 0.05 vs. constant radius flow.
**P < 0.01 vs. constant radius flow.
***P < 0.001 vs constant radius flow.
****P < 0.0001 vs. constant radius flow.