Simplified strong ion difference approach to acid-base balance in healthy foals.

The research paper focuses on determining the strong ion difference and total nonvolatile weak buffers in healthy foals during their first year of life, and how the measurements compare when tested by different laboratory methods and equipment. The study found that these values are influenced by the age of the foal and can be estimated using a certain equation.

Research Context

• The study was conducted over two years and involved 236 healthy foals, which were divided into six age groups. These groups ranged from neonatal foals (< 21 days old) to young horses (9-12 months).
• All the foals were examined at a university teaching hospital.
• The research was trapped within the larger scientific discussion around veterinary health, specifically focusing on the health and wellbeing of young horses.

Research Methodology

• Blood samples were obtained from each foal to determine concentrations of variables such as L-lactate, sodium, potassium, chloride, and total plasma protein.
• The samples collected from the neonatal foals were subjected to analysis using four different devices.
• Statistical techniques were applied to interpret the data. Mean and two standard deviations were used to establish reference intervals for the strong ion difference and total nonvolatile weak buffers under comparison with each analyzer.
• The impact of age on these values was investigated using a one-way ANOVA analysis.
• A linear regression was performed on the data obtained from the neonatal foals to generate an equation for estimating the total nonvolatile weak buffers from total plasma protein concentrations.

Results and Conclusion

• The study observed a significant age effect on both the total nonvolatile weak buffers and the strong ion difference in healthy foals.
• The values for total nonvolatile weak buffers were found to be consistently lower in foals younger than six months, indicating that the reference intervals for this measure should be considered different for these foals compared to adults.
• A significant difference in the strong ion difference was only found during neonatal period (first 21 days of life). Hence, reference intervals for this measure should be considered differently for this period as compared to the rest of the first year of life.
• The newly derived equation for estimating total nonvolatile weak buffers from total plasma protein concentrations in neonatal foals was ATOT = 2.5 times total plasma protein concentration.