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Insufflation (Latin: insufflare, lit. 'to blow into') is the act of blowing something (such as a gas, powder, or vapor) into a body cavity. Insufflation has many medical uses, most notably as a route of administration for various drugs.

Nasal inhalation of recreational drugs ("snorting") is often considered an example of insufflation, though the etymology and scientific understanding of the term does not include inhalation of any kind, as blowing requires the application of positive pressure to push the substance into the nose whereas inhaling refers to drawing or sucking in, which requires the generation of negative pressure.

In the 18th century, the tobacco smoke enema, an insufflation of tobacco smoke into the rectum, was a common method of reviving drowning victims.

Gases are often insufflated into a body cavity to inflate the cavity for more workroom, e.g. during laparoscopic surgery. The most common gas used in this manner is carbon dioxide, because it is non-flammable, colorless and dissolves readily in blood. It is, however, not an inert gas.

Gases can be insufflated into parts of the body to enhance radiological imaging or to gain access to areas for visual inspection (e.g. during colonoscopy).

Gas (usually air) can be used to reduce obstruction using minimally-invasive procedures, e.g. reduction of bowel obstruction caused by intussusception.

Oxygen can be insufflated into the nose by nasal cannulae to assist in respiration.

Pump inhalers for asthmatics deliver aerosolized drugs into the lungs via the mouth. However, the insufflation by the pump is not adequate for delivery to the lungs, necessitating an active inhalation by the patient.

Insufflated gases and vapors are used to ventilate and oxygenate patients (oxygen, air, helium), and to induce, assist in or maintain general anaesthesia (nitrous oxide, xenon, volatile anesthetic agents).


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