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What is the residual capacity of the lungs?(a) 2000 ml(b) 2300 ml(c) 2500 ml(d) 2700 mlThis question was posed to me during a job interview.This question is from Laws of Gases, Uptake of Anaesthetic Gases and Vapours, Patient Monitoring During Surgery topic in chapter Anaesthesia of Clinical Science

Answer»

Correct option is (b) 2300 ML

Easiest explanation: Residual Lung capacity is the amount of AIR that STAYS in the lungs after normal expiration. Lungs normally have 2800 ml is a normal volume in which the tidal volume is 500 ml. This is the amount of air taken in and given out normally. Since the LEFT side of the lung is little smaller to accommodate the heart, there are some minor volume differences between the two lungs.



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