Study, preclinical


A study to test a drug, procedure or medical treatment in animals. The aim is to collect data in support of safety. Preclinical studies are required before clinical trials can be started.

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  • Study, stomach emptying

    Also called a gastric emptying study, this test evaluates the emptying of food from the stomach. For a gastric emptying study, a patient eats a meal in which the solid food, liquid food or both are mixed with a small amount of radioactive material. A scanner (acting like a Geiger counter) is placed over the […]

  • Stuffy nose

    The presence of increased secretions and mucus in the nasal passages, most commonly arising as a result of a common cold, allergic reaction, or inflammation or infection of the paranasal sinuses (sinus infection).

  • Sturge-Weber syndrome

    A congenital, but not inherited, disorder that affects the skin, the neurological system, and sometimes the eyes. The main sign of Sturge-Weber syndrome is a port wine stain birthmark. Neurological symptoms may include seizures and developmental delay. Also known as encephalotrigeminal angiomatosis. See also port wine stain.

  • Stye

    A red, tender bump on the eyelid that is caused by an acute infection of the oil glands of the eyelid. The medical term for a stye is hordeolum.

  • Subacute

    Rather recent onset or somewhat rapid change. In contrast, acute indicates very sudden onset or rapid change, and chronic indicates indefinite duration or virtually no change.


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