1. What is the METs Equation?

The METs (Metabolic Equivalent of Task) equation estimates functional capacity for preoperative assessment. It provides a quantitative measure of exercise tolerance and cardiovascular fitness.

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 exercise duration, with higher values indicating better functional capacity.

3. Importance of METs Calculation

Details: METs assessment is crucial for preoperative risk stratification, with values <4 associated with increased perioperative cardiovascular risk.

4. Using the Calculator

Tips: Enter exercise time in minutes. The value must be valid (time > 0).

5. Frequently Asked Questions (FAQ)

Q1: What do different METs values indicate?
A: <4 METs = poor functional capacity; 4-10 METs = moderate capacity; >10 METs = excellent capacity.

Q2: How is exercise time measured?
A: Time should reflect continuous exercise duration during standardized testing (e.g., treadmill or bicycle test).

Q3: What are typical METs values for daily activities?
A: Eating/dressing ~1-2 METs, walking 3mph ~3-4 METs, climbing stairs ~4-5 METs, running ~8+ METs.

Q4: Are there limitations to this equation?
A: Accuracy may vary with different exercise protocols and patient populations. Clinical correlation is always needed.

Q5: How does this affect surgical planning?
A: Patients with <4 METs may need further cardiac evaluation or optimization before elective surgery.