Induced sputum: time from expectoration to processing

Induced sputum: time from expectoration to processing.

One of the limitations in the use of induced sputum to measure indices of airway inflammation is the perceived need to process the sample within 2 h. Therefore, the authors investigated whether the processing of induced sputum could be delayed. Induced sputum samples obtained from asthmatic subjects (n=30) were examined. Each sample was stored at 4 degrees C. A portion was selected and processe...

Does rinsing the mouth before expectoration improve sputum specimen quality?

Macrophage enrichment from induced sputum

Since induced sputum has become a widely used non-invasive method of recovering cells from the surfaces of the bronchial airways, isolating specific cell populations will be necessary in order to learn more about their specific role in innate immunity and inflammation in the airways. Several studies have demonstrated the ability to conduct ex vivo analyses on sputum cells such as phagocytosis a...

Comparison of two methods of processing induced sputum: selected versus entire sputum.

Sputum analysis is increasingly used to assess airway inflammation in asthma. The analysis of sputum is currently performed with two techniques, i.e., analysis of selected sputum (plugs) and analysis of entire sputum. To investigate the diagnostic value of these two methods, we compared total and differential cell counts and supernatant eosinophil cationic protein (ECP) in selected and entire s...

The effect of processing on inflammatory markers in induced sputum.

The effects of the mucolytic agent, dithioerythritol (DTE), and the temperature at which sputum processing is conducted on cellular and biochemical markers in induced sputum was assessed. Samples from healthy and atopic asthmatic subjects were treated with either DTE or phosphate-buffered saline (PBS) at 22 or 37 degrees C and compared for cell counts and concentrations of histamine, tryptase, ...