Breath-by-breath measurement of the volume displaced by diaphragm motion

1  Department of Pulmonary Physiology, Sir Charles Gairdner Hospital, and 2  Department of Physiology, University of Western Australia, Nedlands, Western Australia 6009, Australia To develop an accurate method to measure the volume displaced by diaphragm motion ( Vdi) breath by breath, we compared V...

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Bibliographic Details
Published in:Journal of applied physiology (1985) 2003-03, Vol.94 (3), p.1084-1091
Main Authors: Singh, Bhajan, Panizza, Janine A, Finucane, Kevin E
Format: Article
Language:English
Subjects:
Adult
Air breathing
Algorithms
Biological and medical sciences
Chromatography, Thin Layer
Diaphragm - anatomy & histology
Diaphragm - diagnostic imaging
Diaphragm - physiology
Female
Fluoroscopy
Fundamental and applied biological sciences. Psychology
Humans
Lung Volume Measurements
Male
Middle Aged
Models, Biological
Muscular system
Radiography, Thoracic
Reference Values
Respiration
Respiratory Mechanics - physiology
Respiratory system
Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics
Spinal Cord - anatomy & histology
Spinal Cord - physiology
Tidal Volume - physiology
Vertebrates: respiratory system
Volume
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Summary:1  Department of Pulmonary Physiology, Sir Charles Gairdner Hospital, and 2  Department of Physiology, University of Western Australia, Nedlands, Western Australia 6009, Australia To develop an accurate method to measure the volume displaced by diaphragm motion ( Vdi) breath by breath, we compared Vdi measured by a previously evaluated biplanar radiographic method ( Singh B, Eastwood PR, and Finucane KE. J Appl Physiol 91: 1913-1923, 2001) at several lung volumes during vital capacity inspirations in 10 healthy and nine hyperinflated subjects with 1 ) Vdi measured from the same chest X-rays by two previously described uniplanar methods ( Petroll WM, Knight H, and Rochester DF. J Appl Physiol 69: 2175-2182, 1990; Verschakelen JA, Deschepper K, and Demendts M.  J Appl Physiol 72: 1536-1540, 1992) and a proposed method that considered actual cross-sectional shape of the rib cage and spinal volume ( Vdi S ); and 2 ) Vdi S measured by lateral fluoroscopy in the same 10 healthy subjects. Relative to biplanar Vdi, Vdi S values from lateral chest X-rays and fluoroscopy were not different, whereas Vdi values of Petroll et al. and Verschakelen et al. were increased by (means ± SD) 1.98 ± 1.59 and 1.16 ± 0.82 liters, respectively (both P  
ISSN:8750-7587
1522-1601
DOI:10.1152/japplphysiol.00256.2002