Objective—To determine concentrations of electrolytes, total bilirubin, urea, creatinine, and hemoglobin; activities of some enzymes; and Hct and number of leukocytes and erythrocytes of newborn calves in relation to the degree of acidosis and treatment with a hypertonic sodium bicarbonate (NaHCO3) solution.
Animals—20 acidotic newborn calves with a blood pH < 7.2 and 22 newborn control calves with a blood pH ≥ 7.2.
Procedures—Approximately 10 minutes after birth, acidotic calves were treated by IV administration of 5% NaHCO3 solution. The amount of hypertonic solution infused was dependent on the severity of the acidosis.
Results—Treatment resulted in a significant increase in the mean ± SEM base excess from −8.4 ± 1.2 mmol/L immediately after birth to 0.3 ± 1.1 mmol/L 120 minutes later. During the same period, sodium concentration significantly increased from 145.3 ± 0.8 mmol/L to 147.8 ± 0.7 mmol/L. Mean chloride concentration before NaHCO3 administration was significantly lower in the acidotic calves (99.6 ± 1.1 mmol/L) than in the control calves (104.1 ± 0.9 mmol/L). Calcium concentration in acidotic calves decreased significantly from before to after treatment. Concentrations of potassium, magnesium, and inorganic phosphorus were not affected by treatment.
Conclusions and Clinical Relevance—Administration of hypertonic NaHCO3 solution to acidotic neonatal calves did not have any adverse effects on plasma concentrations of several commonly measured electrolytes or enzyme activities. The treatment volume used was smaller, compared with that for an isotonic solution, which makes it more practical for use in field settings.
Objective—To determine milk flow, somatic cell
counts (SCCs), and the incidence of clinical mastitis in
cows that had undergone theloresectoscopy for treatment
of teat stenosis caused by mucosal detachment
in the region of the streak canal or Fürstenberg's
Animals—52 cows with teat stenosis that were
treated via theloresectoscopy.
Procedure—Medical records of eligible cows were
reviewed. Additional data regarding milking ease,
SCC, development of clinical mastitis of the affected
gland, and whether the cow remained in the herd
were collected via owner-completed questionnaires.
Results—49 of 52 questionnaires were completed.
At referral, teat sinusitis was diagnosed in 29 of 52
cows. Milk flow was normal in 38 of 41 treated teats
at discharge and in 24 of 40 during the next lactation.
Thirteen of 49 cows were culled during the next lactation
because of abnormal udder health. High SCC
and teat sinusitis at referral and development of clinical
mastitis during the 10-day period after surgery
resulted in high SCCs in the remainder of the current
lactation. The incidence of clinical mastitis during the
remainder of the current and during the next lactation
was higher in cows that had teat sinusitis at the time
of surgery, compared with those that did not.
Conclusions and Clinical Relevance—Teat stenoses
resulting from mucosal lesions in the region of the
streak canal or Fürstenberg's rosette may be successfully
treated via theloresectoscopy. Inflammation
of the teat sinus and gland at the time of surgery may
adversely affect udder health. (J Am Vet Med Assoc 2005;226:1119–1123)