1. n. a device, usually a tube or wick, used to draw fluid from an internal body cavity to the surface. A drain is sometimes inserted during an operation to ensure that any fluid formed immediately passes to the surface, so preventing an accumulation that may become infected or cause pressure in the operation site. Negative pressure (suction) can be applied through a tube drain to increase its effectiveness. Chest drains can be used in the treatment of chest trauma to drain blood (haemothorax) or air (pneumothorax) that accumulates in the pleural space. 2. vb. see drainage.
Facilitation of the drainage of secretions from dilated bronchi of the LUNGS. The patient lies on an inclined plane, head downwards, and is encouraged to cough up as much secretion from the lungs as possible. The precise position depends on which part of the lungs is affected. It may need to be carried out for up to three hours daily in divided periods. It is of particular value in BRONCHIECTASIS and lung abscess (see LUNGS, DISEASES OF).... postural drainage
n. the drawing off of fluid from a cavity in the body, usually fluid that has accumulated abnormally. For example, serous fluid may be drained from a swollen joint, pus removed from an internal abscess, or urine from an overdistended bladder. See also drain.... drainage
a series of therapeutic movements, using massage, developed to enhance lymph drainage, alleviate swelling, and improve wound healing.... manual lymphatic drainage
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