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What is dead space in the respiratory system?

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Dead space is the volume of a breath that does not participate in gas exchange. It is ventilation without perfusion. Physiologic or total dead space is the sum of anatomic dead space and alveolar dead space. read more

Dead space is the space in the respiratory system which does not take part in gaseous exchange. The gaseous exchange takes place in alveoli (inside the lungs). The air entered through nose occupies from nose to alveoli, but ONLY the air at the alveoli takes part in gaseous exchange. read more

Mechanical dead space is dead space in an apparatus in which the breathing gas must flow in both directions as the user breathes in and out, increasing the necessary respiratory effort to get the same amount of usable air or breathing gas, and risking accumulation of carbon dioxide from shallow breaths. read more

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. read more

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Further Research

definition of dead space by Medical dictionary
medical-dictionary.thefreedictionary.com

Respiratory dead space
medical-dictionary.thefreedictionary.com

Respiratory function – Dead space
www.openanesthesia.org