1. What is the METs Equation?

The METs (Metabolic Equivalents) equation estimates energy expenditure during physical activity. It's commonly used in pre-operative assessments to evaluate a patient's functional capacity and surgical risk.

2. How Does the Calculator Work?

The calculator uses the METs equation:

Where:

• \( T \) — Time in minutes

Explanation: The equation calculates metabolic equivalents based on the duration of activity, with higher METs values indicating greater energy expenditure.

3. Importance of METs Calculation

Details: METs assessment is crucial for pre-operative evaluation as it helps identify patients at higher risk for perioperative complications. Patients with <4 METs capacity have increased cardiac risk.

4. Using the Calculator

Tips: Enter the time in minutes for the activity duration. The value must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What are typical METs values for common activities?
A: Sitting quietly = 1 MET, walking at 3 mph = 3.5 METs, climbing stairs = 4 METs, jogging = 7 METs, swimming = 8 METs.

Q2: How are METs used in pre-op assessment?
A: Patients with <4 METs capacity have increased cardiac risk during surgery. Those with >10 METs have excellent functional capacity.

Q3: What factors can affect METs calculation?
A: Age, fitness level, body composition, and specific activity type can all influence actual energy expenditure.

Q4: Are there limitations to this equation?
A: This is a general equation. Actual energy expenditure may vary based on individual factors and specific activities.

Q5: Should this replace clinical assessment?
A: No, this is a screening tool. Comprehensive clinical evaluation is still needed for pre-op risk assessment.