Journal of Applied Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 69: 1542-1545, 1990;
8750-7587/90 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
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 Vallinis, P.
Right arrow Articles by Coates, A. L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Vallinis, P.
Right arrow Articles by Coates, A. L.

Journal of Applied Physiology, Vol 69, Issue 4 1542-1545, Copyright © 1990 by American Physiological Society

ARTICLES

A very low dead space pneumotachograph for ventilatory measurements in newborns

P. Vallinis, G. M. Davis and A. L. Coates
Respiratory Medicine Division, McGill University-Montreal, Quebec, Canada.

In premature and full-term neonates, technical limitations hamper the measurements of pulmonary mechanics. Current commercially available pneumotachographs (PNT) either increase the dead space, causing hyperventilation, or increase resistance, thus altering the mechanics of breathing. We modified a previously described low dead space PNT for infants to increase the linear range and frequency response. The mean resistance of the new PNT was 2.44 cmH2O.1-1.s compared with 2.65 cmH2O.1-1.s for the Fleisch no. 0 PNT. The added dead space over the standard endotracheal connector was 0.6 ml compared with 4.7 ml for the Fleisch PNT. Like the Fleisch PNT, the flow resistance was linear from 0 to 15 l/min. In response to a sinusoidal waveform, the new PNT had a phase angle of 21 degrees at 5 Hz and 50 degrees at 16 Hz compared with 19 degrees and 43 degrees, respectively, for the Fleisch PNT. The change in attenuation for both systems was zero until 20 Hz. In summary, the new PNT is lightweight and provides accuracy and low resistance with a very small dead space.


This article has been cited by other articles:


Home page
 PediatricsHome page
D. A. Fitzgerald, G. Mesiano, L. Brosseau, and G. M. Davis
Pulmonary Outcome in Extremely Low Birth Weight Infants
Pediatrics, June 1, 2000; 105(6): 1209 - 1215.
[Abstract] [Full Text]

Home page
 Am. J. Respir. Crit. Care Med.Home page
B. BOUFERRACHE, S. FILTCHEV, A. LEKE, Q. MARBAIX-LI, M. FREVILLE, and C. GAULTIER
The Hyperoxic Test in Infants Reinvestigated
Am. J. Respir. Crit. Care Med., January 1, 2000; 161(1): 160 - 165.
[Abstract] [Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online