PMID: 7068490Mar 1, 1982Paper

Influence of panting frequency on plethysmographic measurements of thoracic gas volume

Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
A B BohadanaD Teculescu


Using an integrated flow pressure-corrected body plethysmograph we obtained total lung capacities (TLC) derived from thoracic gas volumes measured at low, medium, and high panting frequencies in 10 healthy men and in 13 patients with chronic airflow obstruction before and after an aerosol of albuterol. Using a gastric balloon we also assessed gastric-to-mouth pressure ratios (delta Pga/delta Pm). In patients before albuterol, estimated TLC remained unchanged from low to medium and increased (not significantly) from medium to high frequency. Healthy subjects and patients after albuterol showed a significant decrease in TLC from low to medium panting frequencies, which persisted after correcting the data for abdominal gas compression using observed delta Pga/delta Pm. In patients after albuterol the results may be explained, at least in part, by intrathoracic airway compliance and mechanical inhomogeneity of the lung. In healthy subjects a remote possibility is the association of mechanical inhomogeneity and nonuniform pleural pressure.


Apr 29, 2006·Journal of Applied Physiology·Tibor Z JánosiZoltán Hantos
Apr 16, 1998·Journal of Applied Physiology·R Peslin, C Duvivier

Related Concepts

Aerosol Dose Form
Airway Resistance
Lung Compliance
Lung Volume Measurements
Plethysmography, Whole Body
Pulmonary Alveolar Structure

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