Table 2.
Relationship between airway morphological values and pressure drop.
| Max Pressure (Pa) | ΔNA (Pa) | ΔRA (Pa) | ΔOA (Pa) | |
|---|---|---|---|---|
| CSA (mm2) | ||||
| CSAmin (mm2) | .849** | .306 | .544** | .550** |
| P | .000 | .121 | .003 | .003 |
| CSANA (mm2) | .503** | .853** | .275 | −.189 |
| P | .008 | .000 | .165 | .345 |
| CSARA (mm2) | .558** | .290 | .842** | .493** |
| P | .002 | .143 | .000 | .009 |
| CSAOA (mm2) | .431* | −.223 | .414* | .865** |
| P | .025 | .264 | .032 | .000 |
| Volume (cm3) | ||||
| PAv (cm3) | .225 | .509** | .134 | −.123 |
| P | .258 | .007 | .504 | .540 |
| NAv (cm3) | .234 | .743** | .046 | −.439* |
| P | .240 | .000 | .819 | .022 |
| RAv (cm3) | .183 | .435* | .099 | −.149 |
| P | .361 | .023 | .623 | .458 |
| OAv (cm3) | .140 | .200 | .029 | .056 |
| P | .486 | .318 | .885 | .780 |
*P < .05; **P < .01. CSA = cross-sectional area, CSAmin = minimum CSA, CSANA = CSA of NA, CSAOA = CSA of OA, CSARA = CSA of RA, Max = maximum value, NA = nasopharyngeal airway, ΔNA = pressure changes in NA corresponding to adenoids part, NAv = NA volume, OA = oropharyngeal airway, ΔOA = pressure changes in OA corresponding to tonsil part, OAv = OA volume, PAv = pharyngeal airway volume, RA = retropalatal airway, ΔRA = pressure changes in RA where adenoids and palatine tonsil influence, RAv = RA volume.