Anatomical dead space is increased by all except:
|C||Massive pleural effusion|
Massive pleural effusion
Anatomical dead space is increased by:
a. Neck extension, jaw protrusion.
b. Bronchodilatation (atropine, halothane, deriphylline etc).
c. Anaesthesia mask and circuits.
d. Positive pressure ventilation techniques (IPPV and PEEP).
e. Increased lung volume (like in inspiration).
f. Old age.
Anatomical dead space is decreased in:
a. Intubation (nasal cavity bypassed).
b. Tracheostomy (upper airways bypassed).
d. Neck flexion.
e. Decreased lung volume.