Reliability of voluntary cough assessments using respiratory flow waveform

Area of Science:

• Respiratory Physiology
• Pulmonary Function Testing

Background:

• Voluntary cough assessment is crucial for evaluating respiratory health.
• Reliable measurement techniques are needed for accurate cough function analysis.

Purpose of the Study:

• To assess the reliability of respiratory flow waveform measurements during voluntary coughs.
• To evaluate the consistency of flow wave data recorded using specialized equipment.

Main Methods:

• Twenty healthy participants performed spirometry.
• Respiratory flow waves during single and consecutive voluntary coughs were recorded.
• Intra-class correlation coefficients were used to determine intra-rater and inter-rater reliability.

Main Results:

• High inter-rater reliability (ICC > 0.9) was observed for both single and consecutive cough tasks.
• Good intra-rater reliability (ICC 0.6-0.8) was found for voluntary cough measurements.
• Cough peak flow and volume acceleration were higher in the first assessment during consecutive coughs.

Conclusions:

• Respiratory flow waveform analysis during voluntary coughs offers high reliability.
• This method shows promise for assessing patients with impaired cough function.
• Further validation, including data standardization, will enable clinical application.