Tracheostomy reduces dead space by ?: (A) By-passing upper airway, (B) Increasing V/Q ratio, (C) Reducing airflow resistance, (D) By all of the above mechanisms
Answer is A. Ans. is'a'i.e., By-passing upper airway (Ref: Morgan 4tu/e p. 553) Impoant effects of tracheostomy on respiratory physiologyTracheostomy decreases dead space as upper airways and nasal cavity are bypassed.Tracheostomy decreases ventilation/perfusion (V/Q) ratio.Tracheostomy reduces the airflow resistance.