Comparison of measurements of airway resistance during panting and quiet breathing. |
Seon Hee Cheon1, Woo Hyung Lee1, Kee Young Lee1, Se Kyu Kim2, Joon Chang2, Sung Kyu Kim2, Won Young Lee2 |
1Department of Internal Medicine, College of Medicine Ewha Womans University, Seoul, Korea 2Department of Internal Medicine, College of Medicine Yonsei University, Seoul, Korea |
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Abstract |
Background Panting method for airway resistance measurement has the disadvantages of depart-
ing from the normal breathing pattern and of difficult for some patients to perform. We can measure airway resistance during quiet breathing under more physiologic conditions. Airway resistance is often measured during panting but attempts have been made to facilitate resistance measurements during quiet breathing. This study was designed to compare airway resistance measurements during panting with those during quiet breathing.
Methods The 24 normal persons and 29 pulmonary disease patients were included in this study.
Spirometry was performed and airway resistance measurement was also done during panting and quiet breathing concomittently.
Results The results were as follows;
1) High correlations were found between airway resistance measurements during panting and quiet breathing.
2) Resistance fe11 during panting, 21.2% in Raw tot, and 22.1% in Raw 0.5.
3) ln normal persons, airway resistance fell more during panting when comparing to those in pulmonary disease patients 4) This was largely independent of thoracic gas volume differences, because the specific airway conductance rose significantly during panting.
5) The patients in whom resistance didn’t fell during panting was supposed to the patients who couldn’t perform panting successively because of high resistance.
Conclusions Although airway resistance can be measured during panting or quiet breathing according to the patient’s performance, we must consider resistance fell during panting, by a mean 20% . It may be concluded that quiet breathing is more likely than panting to provide a relevant measurement of airway resistance |
Key Words:
Airway resistance, Panting, Quiet breathing, Raw tot, Raw 0.5 |
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