ERJ
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Farre, R
Right arrow Articles by Navajas, D
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Farre, R
Right arrow Articles by Navajas, D
Eur Respir J 2000; 15: 314-319
Copyright © ERS Journals Ltd 2000

Original Articles

Noninvasive assessment of respiratory resistance in severe chronic respiratory patients with nasal CPAP

R Farre, E Gavela, M Rotger, M Ferrer, J Roca, and D Navajas

Noninvasive measurement of respiratory resistance during nasal ventilatory support could be useful to assess the mechanical status of the patient and to optimize the ventilator settings. The aim was to investigate whether the forced oscillation technique (FOT) applied through a nasal mask allows reliable noninvasive estimation of respiratory resistance (Rrs) in patients with severe chronic respiratory disease. FOT Rrs (5 Hz) and lung resistance (R(L)) measured simultaneously from spontaneous breathing signals by an oesophageal balloon were compared in eight patients with chronic obstructive pulmonary disease and in six patients with a restrictive ventilatory defect due to chest wall disease. Measurements were performed in sitting and supine postures during application of nasal continuous positive airway pressure (CPAP): 4, 8 and 12 cmH2O in obstructive patients and 4 cmH2O in restrictive patients. In the restrictive patients Rrs and R(L) (in cmH2O x s x L(-1)) were virtually coincident: mean+/-SD, 12.6+/-6.1 and 11.6+/-6.6 (r=0.96) in sitting and 9.7+/-3.1 and 10.2+/-3.3 (r=0.92) in supine posture, respectively. In the obstructive patients (CPAP = 4 cmH2O), Rrs slightly underestimated R(L): mean+/-SD, 11.5+/-5.9 and 14.4+/-16.8 (r=0.92) in sitting and 15.0+/-9.8 and 21.1+/-12.6 (r=0.96) in supine posture, respectively. Similar results were found at CPAP = 8 and 12 cmH2O. The results obtained in patients with resistance values in the range typically found in nasal ventilatory support suggest that forced oscillation technique could be valuable to noninvasively estimate a patient's respiratory mechanical resistance.


This article has been cited by other articles:


Home page
 Eur Respir JHome page
R. L. Dellaca, M. Rotger, A. Aliverti, D. Navajas, A. Pedotti, and R. Farre
Noninvasive detection of expiratory flow limitation in COPD patients during nasal CPAP
Eur. Respir. J., May 1, 2006; 27(5): 983 - 991.
[Abstract] [Full Text] [PDF]

Home page
 Eur Respir JHome page
J. Rigau, R. Farre, J. Roca, S. Marco, A. Herms, and D. Navajas
A portable forced oscillation device for respiratory home monitoring
Eur. Respir. J., January 1, 2002; 19(1): 146 - 150.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Respir. Crit. Care Med.Home page
R. FARRE, M. MANCINI, M. ROTGER, M. FERRER, J. ROCA, and D. NAVAJAS
Oscillatory Resistance Measured during Noninvasive Proportional Assist Ventilation
Am. J. Respir. Crit. Care Med., September 1, 2001; 164(5): 790 - 794.
[Abstract] [Full Text] [PDF]

Home page
 Eur Respir JHome page
R. Farre, J. Rigau, J.M. Montserrat, E. Ballester, and D. Navajas
Evaluation of a simplified oscillation technique for assessing airway obstruction in sleep apnoea
Eur. Respir. J., March 1, 2001; 17(3): 456 - 461.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2000 by the European Respiratory Society.