What's a Body Wave Perm - Find out what is a body wave perm hairstyle, if it will suit your hair type and how to get the body wave perm to get fuller, thicker hair.
Subcutaneous emphysema can be caused by medical procedures and medical conditions that cause the pressure in the alveoli of the lung to be higher than that in the tissues outside of them. Its most common causes are pneumothorax and a chest tube that has become occluded by a blood clot or fibrinous material.
Emphysema caused by smoking most often occurs in the upper lobes of the lungs. In chronic bronchitis, smoking triggers inflammation that causes damage in the airways. The processes involved include: 1  Damage to the cilia, the hair-like waving projections that move mucus, bacteria, and foreign particles out of the lungs. 2  Enlargement of the mucus glands in the large airways of the lungs. 3  Overgrowth of smooth muscle cells in the airway.