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This is a method of determining what substances are in a person’s system by testing bodily fluids. It can detect substances such as prescribed medication and also illegal substances such as drugs or alcohol. Dose titration means to slowly increase the dose of a drug to a level that can be maintained.

An x-ray study that follows the path of radioactive potassium carried by the blood into heart muscle. Damaged or dead muscle can be defined, as can the extent of narrowing in an artery.

Mechanical removal of mucous from the nose, throat or endotracheal tube with a plastic tube.