What is bibasilar atelectasis?

Atelectasis refers to an area of the lung that is squeezed into a smaller than normal size. Bibasilar means this happens in the left and right bottom parts of the lung. It can be due to many things - most commonly obesity, taking small breaths, plugs of mucus, or medications that suppress the cough. Rarely, more serious conditions such as blood clots can present with bibasilar atelectasis.