Dyspnea is the subjective experience of difficulty breathing and may be characterized by patients as tightness in the chest, shortness of breath, breathlessness, or a feeling of suffocation. Up to half of people at the end of life may experience severe dyspnea.
A casualty with a penetrating chest injury will have had the outer layer of the pleura damaged. This causes air to be sucked in from the outside of the chest into the pleural cavity which in turn causes the lung to collapse (pneumothorax).
Asthma attacks can be very traumatic for the casualty, especially children, so be sure to reassure them and keep them as calm as possible. This is best achieved by being calm yourself and let them know you are a first aider.
The environment of the lung is very moist, which makes it a hospitable environment for bacteria. Many respiratory illnesses are the result of bacterial or viral infection of the lungs. Because we are constantly being exposed to harmful bacteria and viruses
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