[en] Total pulmonary resistance (RL) and upper airway resistance (Ruaw) were measured in nine healthy unsedated Friesian cattle divided into three age groups. Mean values for these three groups of animals aged four, 188 and 1157 days were 0.32, 0.13 and 0.06 kPa litre-1 s for RL; 0.14, 0.09 and 0.05 kPa litre-1 s for Ruaw; and 0.45, 0.68 and 0.79 for the ratio Ruaw/RL respectively. Ruaw, measured with the head in the normal position, did not significantly differ from values obtained with the head in the horizontal position. Ruaw, measured with the head in the vertical position, was approximately three times greater than when measured in the two other positions.
Disciplines :
Veterinary medicine & animal health Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Lekeux, Pierre ; Université de Liège - ULiège > Faculté de Médecine vétérinaire
Hajer, R.; University of Utrecht - Netherlands > Large Animal Medicine
Breukink, H. J.; University of Utrecht - Netherlands > Large Animal Medicine
Language :
English
Title :
Upper airway resistance in healthy Friesian cattle
Publication date :
1985
Journal title :
Research in Veterinary Science
ISSN :
0034-5288
eISSN :
1532-2661
Publisher :
British Veterinary Association, London, United Kingdom
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