Forced expiratory volume in one second (FEV-1) less than 40 percent of predicted value, with Flow-Volume Loop compatible with upper airway obstruction, or; permanent tracheostomy
FEV-1 of 40- to 55-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction
FEV-1 of 56- to 70-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction
FEV-1 of 71- to 80-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction
Note: Or evaluate as aphonia (DC 6519).
| Description | Percentage |
|---|---|
|
Forced expiratory volume in one second (FEV-1) less than 40 percent of predicted value, with Flow-Volume Loop compatible with upper airway obstruction, or; permanent tracheostomy |
100 |
| Description | Percentage |
|---|---|
|
FEV-1 of 40- to 55-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction |
60 |
| Description | Percentage |
|---|---|
|
FEV-1 of 56- to 70-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction |
30 |
| Description | Percentage |
|---|---|
|
FEV-1 of 71- to 80-percent predicted, with Flow-Volume Loop compatible with upper airway obstruction |
10 |
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