Pneumonia is an inflammation of the lungs usually caused by a viral or bacterial infection. When the lungs are infected, the causative microorganisms multiply in the alveoli, the tiny microscopic sacs where the blood picks up oxygen and removes carbon dioxide. These fill with inflammatory fluid or pus and gas exchange is difficult to do. Pneumonia is potentially serious, especially when it affects people with chronic illnesses.
In most cases, only one pulmonary lobe is affected (the lungs consist of five lobes) which allows the sick person not to die of asphyxiation.
When pneumonia only affects the lobes of the lungs, it is called “lobar pneumonia”. When the infection also affects the bronchi, it is called "broncho-pneumonia".
The SMART-COP score is used to assess the risk of recourse to vasopressor amines and/or assisted ventilation in the context of acute pneumonitis.