The physiological dead space is decreased by:: (A) Upright position, (B) Positive pressure ventilation, (C) Neck flexion, (D) Emphysema
Answer is C. Ans. is 'c' i.e., Neck flexion FactorEffectPosture UprightincreaseSupinedecreasePosition of airway Neck extensionincreaseNeck flexiondecreaseAgeincreaseArtificial airwaydecreasePositive pressure ventilationincreaseAnticholinergic drugsincreasePulmonary perfusion Pulmonary emboliincreaseHypotensionincreaseEmphysemaincrease Factors affecting dead space.