Abstract
• Due to COVID-19, compliance of manufactured respirators with standards seems to be placed in the second plan. • Personal protective equipments (PPE), such as respirators, causes carbon dioxide re-breathing in healthcare workers. • Even when resting, both expiratory and inspiratory carbon dioxide levels increase significantly with the use of PPE. • It should be kept in mind that healthcare workers may experience symptoms related to hypercapnia during their use of PPE.