Functional Capacity

Functional capacity is an important consideration during pre-operative evaluation.

Functional capacity can be expressed in metabolic equivalent (MET) level; the O2consumption (VO2) of a 70 kg, 40 yr old man in a resting state is 3.5 ml/kg/min or 1 MET. Perioperative cardiac and long-term risks are increased in patients unable to meet a 4-MET demand during most normal daily activities. Examples of leisure activities with less than 4 METs are baking, slow ballroom dancing, golfing with a cart, walking at a speed of approximately 2-3 mph. Activities requiring more than 4 METs include climbing hills, ice skating, running a short distance. More than 10 METs include participation in sports like swimming, football, single tennis, basketball and skating.