Drain (surgery)

A surgical drain is a tube used to remove pus, blood or other fluids from a wound. They are commonly placed by surgeons or interventional radiologists. Drains inserted after surgery do not result in faster wound healing or prevent infection, but are sometimes necessary to drain body fluid which may accumulate and in itself become a focus of infection or retained blood complications.

The routine use of drains for surgical procedures is diminishing as better radiological investigation and confidence in surgical technique have reduced their necessity. It is felt now that drains may hinder recovery by acting as an 'anchor' limiting mobility post surgery and the drain itself may allow infection into the wound. In certain situations their use is unavoidable.

Drains may be hooked to wall suction, a portable suction device, or they may be left to drain naturally. Accurate recording of the volume of drainage as well as the contents is vital to ensure proper healing and monitor for excessive bleeding. Depending on the amount of drainage, a patient may have the drain in place one day to weeks. Drains will have protective dressings that will need to be changed daily/as needed.

Drains have a tendency to become occluded or clogged, resulting in retained fluid that can contribute to infection or other complications. Thus efforts must be made to maintain and assess patency when they are in use. Once a drain becomes clogged or occluded, it is usually removed, as it is no longer providing any benefit.

Surgical drains can be broadly classified into:

...
Wikipedia