Question

Dead space is best described as

A) The volume of gas inspired and expired by the patient
B) The endotracheal tube
C) The inspiratory limb of the circuit
D) Any space where inhalation and exhalation coincide
E) All of the above

Answer 1

Dead space refers to the air within the respiratory system that is not used in the gas exchange process.

Step-by-step explanation:

Anatomical dead space refers to the air within the respiratory structures that never participates in gas exchange, because it does not reach functional alveoli. Alveolar dead space involves air found within alveoli that are unable to function, such as those affected by disease or abnormal blood flow. Total dead space is the anatomical dead space and alveolar dead space together, and represents all of the air in the respiratory system that is not being used in the gas exchange process.