SPUTUM FOR EOSINOPHILS***

The cells in a healthy sputum sample are usually less than 1% eosinophils. If your count is higher than that, your doctor may diagnose you with eosinophilic asthma. Elevated sputum eosinophils, with or without blood eosinophils, were associated with lower lung function. Elevated blood eosinophils only in combination with elevated sputum eosinophils were associated with COPD exacerbations.