Frequency dependence of capnography in anesthetized rabbits.

Date publication

janvier 2014

Auteurs

Membres identifiés du Cancéropôle Est :
Pr MARCHAL Frédéric

Tous les auteurs :
Ioan I, Demoulin B, Duvivier C, Leblanc AL, Bonabel C, Marchal F, Schweitzer C, Varechova S

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/24035836

Résumé

Aspirative capnography may be of help to diagnose early childhood asthma, but clinical usefulness in young children is limited by the relatively high respiratory rate. This study aimed to characterize the [Formula: see text] time course during airway constriction in 8 anesthetized rabbits, artificially ventilated at 30, 60 and 80breaths/min. Methacholine was inhaled to double the respiratory resistance measured at 8Hz by the forced oscillation technique. The capnogram shape changed in response to both methacholine and ventilatory frequency. Slope of phase II, the peak of first-order time derivative and trough of the second-order time derivative of the [Formula: see text] signal, were significantly attenuated after methacholine compared with baseline at all breathing rates (p

Référence

Respir Physiol Neurobiol. 2014 Jan 1;190:14-9