Is oxygen consumption usually related to the patient’s body surface area?
Oxygen Consumption -- It can be defined as measure of a person's ability to take in oxygen in to the body tissues up to cells through respiratory tract via cardiovascular system and ability of working tissues to use oxygen
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The volume of oxygen consumed by the body in one minute, it is measured in liters or ml / minute at standard temperature , pressure .
Consumption of oxygen normally -- Normally 3.5 to 4 ml / oxygen per minute at normal temperature .
Human need oxygen per day - The average person needs around 0. 84 kg of oxygen per day .The average adult at rest inhales and exhales 7 or 8 liters of air per minute , about 11,000 liters of air in a day .
Air which is inhaled about 20% oxygen and air which is exhaled is about 15% so about 5% of the volume of air is consumed in each breath and converted in to carbon di oxide .Human uses about 550 liters of pure oxygen per day .
Oxygen up take -- It represent oxygen consumption by tissues and is a function of cardiac out put and difference in oxygen content between venous and arterial blood .
Measurement of oxygen consumption -- It can be calculated by using following formula --
=( inspired O2 fraction - end tidal O2 fraction ) X minute ventilation 1
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