Larynx, stenosis of, including residuals of laryngeal trauma (unilateral or bilateral):

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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