wasted ventilation

wast·ed ven·ti·la·tion

that part of pulmonary ventilation that is ineffective in exchanging oxygen and carbon dioxide with pulmonary capillary blood; calculated as physiologic dead space multiplied by respiratory frequency.

wast·ed ven·ti·la·tion

(wāstĕd ven'ti-lāshŭn) That part of pulmonary ventilation that is ineffective in exchanging oxygen and carbon dioxide with pulmonary capillary blood; calculated as physiologic dead space multiplied by respiratory frequency.