1. What is Potassium Deficit?

The potassium deficit calculation estimates the total amount of potassium needed to correct hypokalemia in adults. It's based on the difference between the current potassium level and the target level of 4 mmol/L.

2. How Does the Calculator Work?

The calculator uses the potassium deficit equation:

Where:

• \( K \) — Current potassium level (mmol/L)
• \( 4 \) — Target potassium level (mmol/L)
• \( 0.6 \) — Distribution factor for potassium
• \( Weight \) — Patient's weight in kilograms

Explanation: The equation estimates the total body potassium deficit based on the difference from normal levels and the patient's size.

3. Importance of Potassium Deficit Calculation

Details: Accurate potassium deficit estimation is crucial for safe and effective correction of hypokalemia, preventing both under- and over-correction.

4. Using the Calculator

Tips: Enter current potassium level in mmol/L and weight in kg. All values must be valid (potassium > 0, weight > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why use 4 mmol/L as the target?
A: 4 mmol/L represents the mid-range of normal serum potassium levels (typically 3.5-5.0 mmol/L).

Q2: What does the 0.6 factor represent?
A: This accounts for potassium's distribution between intracellular and extracellular spaces.

Q3: How should the deficit be corrected?
A: Correction should be gradual, typically over 24-48 hours, with monitoring to avoid overcorrection.

Q4: Are there limitations to this calculation?
A: This is an estimate. Actual requirements may vary based on clinical context, acid-base status, and renal function.

Q5: Does this apply to severe hypokalemia?
A: In severe cases (<2.5 mmol/L), more aggressive replacement may be needed under close monitoring.