The use of urea as a marker of body water in the nursing foal.
Urea, compared with deuterium oxide (D2O) as a reference, was used as a body marker to estimate body water volume in ten 2-month old nursing foals. Plasma urea clearance was regular over 10 h and the R2 of the disappearance curve was between 0.93 and 0.98. Mean urea space was about 4% lower than D2O space, but the standard deviation of the proportion of water in body weight was higher with urea (3.8%) than with D2O (1.6%). Calculated urea entry rate was 49 mg/h/kg LW0.75.
Geerken
C
C
Laboratoire de la Lactation, I.N.R.A., Ceyrat, France.
Doreau
M
M
Boulot
S
S
D000818:Animals; D000833:Animals, Suckling; D001834:Body Water / Q000032:analysis* / Q000378:metabolism; D003903:Deuterium / Q000378:metabolism; D017666:Deuterium Oxide; D006736:Horses / Q000378:metabolism*; D014508:Urea / Q000378:metabolism*; D014867:Water / Q000378:metabolism
D014867:Water; D014508:Urea; D003903:Deuterium; D017666:Deuterium Oxide