Short communication: estimation of plasma osmolality from plasma electrolytes, glucose, and urea in calves.
Plasma osmolality estimated from plasma concentrations of Na+, Cl-, K+, glucose, and urea was compared with measured osmolality in preweaned Holstein calves. When calves (n = 5) were fed only milk replacer after fasting for 24 h, measured osmolality fluctuated almost in parallel with estimated osmolality during the 8-h period after feeding, although estimated values were about 90% of measured values. When calves (n = 5) were fed only calf starter after fasting for more than 16 h, measured osmolality did not parallel the estimated osmolality during the 8-h period after feeding. Some factors depressed measured osmolality in the first 2 h.
Iriki
T
T
School of Veterinary Medicine, Azabu University, Fuchinobe, Sagamihara, Japan.
Takahashi
M
M
Wada
Y
Y
Funaba
M
M
Abe
M
M
D000821:Animal Feed / Q000032:analysis; D000818:Animals; D001786:Blood Glucose / Q000032:analysis*; D002417:Cattle / Q000097:blood*; D002712:Chlorides / Q000032:analysis / Q000097:blood; D004573:Electrolytes / Q000097:blood*; D007564:Japan; D008297:Male; D009994:Osmolar Concentration; D011188:Potassium / Q000032:analysis / Q000097:blood; D012016:Reference Values; D012964:Sodium / Q000032:analysis / Q000097:blood; D013997:Time Factors; D014508:Urea / Q000097:blood*
D001786:Blood Glucose; D002712:Chlorides; D004573:Electrolytes; D014508:Urea; D012964:Sodium; D011188:Potassium