Respiratory snorkel and valve system for breath-by-breath gas analysis in swimming

The present study aimed to compare a standard facemask (CM) and a newly modified swimming snorkel and valve system (SV) for breath‐by‐breath (B×B) gas analysis (K4 b2, Cosmed, Rome, Italy), and to validate the system under controlled laboratory conditions before being used in swimming. Nine healthy...

Full description

Saved in:
Bibliographic Details
Published in:Scandinavian journal of medicine & science in sports 2003-10, Vol.13 (5), p.322-329
Main Authors: Keskinen, Kari L., Rodríguez, Ferran A., Keskinen, Ossi P.
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
gas analysis
Humans
Investigative techniques of respiratory function
Investigative techniques, diagnostic techniques (general aspects)
Male
Medical sciences
Monitoring, Physiologic - instrumentation
oxygen uptake
Pulmonary Ventilation - physiology
Regression Analysis
respiratory valve
Swimming - physiology
ventilation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The present study aimed to compare a standard facemask (CM) and a newly modified swimming snorkel and valve system (SV) for breath‐by‐breath (B×B) gas analysis (K4 b2, Cosmed, Rome, Italy), and to validate the system under controlled laboratory conditions before being used in swimming. Nine healthy males performed two bouts of a stepwise exercise on an electrically braked stationary bicycle on separate days. Ventilatory and gas exchange parameters were analyzed using the same B×B portable system, with subjects breathing alternatively through the two different valves. Agreement between both methods was evaluated by Passing–Bablok regression analysis. The gas exchange values measured using the SV were highly correlated with those obtained using the CM (R2 values >0.9). However, differences existed between the two series of measurements so that most ventilatory and gas exchange parameters were lower (3–7%) with the SV. The error when using the SV device was mainly systematic along the whole range of measurement. Accordingly, linear regression equations were developed to further improve the accuracy of the measures when using the SV. Therefore, the modified respiratory SV system can be considered as a valid device for collecting expired gas for B×B analysis, comparable to the standard facemask, with the advantage of being suitable for measurements during swimming.
ISSN:0905-7188
1600-0838
DOI:10.1034/j.1600-0838.2003.00319.x