Equine Free Water Deficit Explained

Learn the formula, clinical use and limitations of the equine free water deficit.

Estimates free-water deficit from weight, current sodium, target sodium and a clinician-selected total-body-water fraction.

Formula

value = weight * tbw_fraction * (current_sodium/target_sodium - 1)

What this calculator does

Estimates free-water deficit from weight, current sodium, target sodium and a clinician-selected total-body-water fraction.

Clinical use

The output is a modelled deficit, not an administration instruction. Correction rate and monitoring are critical.

Important limitations

Make the chosen total-body-water fraction explicit in the record because it materially affects the estimate.

References

  1. Use current equine medicine references, local protocols and patient-specific veterinary judgement.

Return to calculator