Paper Information

Title: 

ASSESSMENT RATE OF VENTILATION IN HABITUAL AND OBLIGATORY SWITCHING TIME FROM NASAL TO ORONASAL BREATHING IN HEALTHY NON SMOKING HUMAN

Type: POSTER
Author(s): AZARFARIN M.,ALIPOUR M.R.,KHAMENEHEI S.,DERAFSHPOUR L.,SHOARIAN Z.
 
 
 
Name of Seminar: IRANIAN CONGRESS OF PHYSIOLOGY AND PHARMACOLOGY
Type of Seminar:  CONGRESS
Sponsor:  PHYSIOLOGY AND PHARMACOLOGY SOCIETY, MASHHAD UNIVERSITY OF MEDICAL SCIENCE
Date:  2007Volume 18
 
 
Abstract: 

Introduction: Importance of nasal breathing is now a well known fact. Habitual  switching point from nasal to oronasal breathing during exercise has been investigated extensively, but none of the previous studies have made a quantitative approach to habitual versus obligatory switching from nasal to oronasal breathing during exercise in male and female. The present study is scheduled to investigate this.
Methods: Twenty young adult (20±2 yrs) volunteers (10 males and 10 females) participated in the study. An incremental exercise protocol was incorporated. Switching point from nasal to oronasal breathing was determined, using a CO2 sensor. This was accompanied with coincident ventilation recordings.
Results: Duration of habitual nasal breathing was shorter than tolerated one. There were significant correlations between oronasal switching time (osp), ventilation increments and workload. Moreover; switching time was significantly longer in males. But rate of increase in ventilation (
DVE/osp ratio) was statistically the same in two sexes.
Discussion: In conclusion, according to results obtained in this study duration of tolerated nasal breathing is longer than habitual one. These results suggest a lower toleration time for nasal breathing in female while their (
DVE/osp ratio) being the same as males.

 
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