APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Anatomic dead space is the total volume of the conducting airways from the nose or mouth down to the level of the terminal bronchioles, and is about 150 ml on the average in humans. The anatomic dead space fills with inspired air at the end of each inspiration, but this air is exhaled unchanged.

Detailed explanation-2: -The anatomic dead space is the gas volume contained within the conducting airways. The normal value is in the range of 130 to 180 mL and depends on the size and posture of the subject.

Detailed explanation-3: -Anatomic dead space is the volume of gas within the conducting zone (as opposed to the transitional and respiratory zones) and includes the trachea, bronchus, bronchioles, and terminal bronchioles; it is approximately 2 mL/kg in the upright position.

Detailed explanation-4: -The anatomical dead space is that portion of the respiratory system, which is external to the alveoli and includes the air conveying ducts from the nostrils to the terminal bronchioles, i.e., the upper erspiratory tract.