1. What is Potassium Wasting?

Definition: Potassium wasting occurs when potassium output exceeds intake, leading to negative potassium balance.

Purpose: This calculator helps determine the net potassium loss (or gain) by comparing intake and output.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Potassium wasting (mmol)
• \( K_i \) — Potassium intake (mmol)
• \( K_o \) — Potassium output (mmol)

Explanation: Positive values indicate net potassium retention, while negative values indicate potassium wasting.

3. Clinical Importance

Details: Potassium wasting is significant in conditions like renal tubular acidosis, diuretic use, and mineralocorticoid excess.

4. Using the Calculator

Tips: Enter potassium intake and output values in mmol. Both values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a normal potassium balance?
A: In healthy individuals, potassium intake and output are typically balanced (W ≈ 0).

Q2: When is potassium wasting significant?
A: Clinically significant when W < -20 mmol/day, indicating pathological potassium loss.

Q3: How do I measure potassium output?
A: Typically measured via 24-hour urine collection for potassium excretion.

Q4: What causes potassium wasting?
A: Common causes include diuretics, hyperaldosteronism, renal tubular disorders, and magnesium deficiency.

Q5: How is potassium intake calculated?
A: Sum of dietary potassium (food/drink) and any intravenous potassium supplementation.