The MSDS HyperGlossary: Embolism

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Embolism

Definition

An embolism is a total or partial blockage of a blood vessel that impedes or stops blood flow. The blockage can be caused by a blood clot, bacteria, air, parasites, bone marrow (from breakage of a major bone) or other bodily or foreign materials.
Embolisms can be life-threatening conditions. For example, if a blood clot travels to the heart and blocks blood flow in the vessels supplying the heart muscles, the result could be a fatal heart attack. If this happens in the brain, the result could be a stroke (also called a "brain attack").

Additional Info

pulmonary embolism

A thrombosis is a blood clot inside a blood vessel. If it breaks free and creates an obstruction it is then called an embolism.

While symptoms of embolisms are often not noted by the victim, certain risk factors for pulmonary embolism are:

Immobility for a long period.
Having had surgery within the past month or two.
Medical history of cancer or heart disease.
Deep venous thrombosis.
Previous pulmonary embolisms.
Pregnancy or use of estrogen.
Hypercoagulability (tendency to clot easily).

Embolisms can form due to trauma (damage) to the body. For example, a bullet, bone marrow or amniotic fluid could work its way into a blood vessel during an accident and cause an embolism.

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MSDS Relevance

health hazards

Additional Reading

The 5 Kinds of Embolisms at Queen's University Belfast.
Are You At Risk for Deep Vein Thrombosis? at the US Centers for Disease Control and Prevention (CDC).
What Is Pulmonary Embolism? at the NIH's National Heart, Lung, and Blood Institute.
Arterial embolism (with illustrations) and Pulmonary Embolism at the NIH's MedLine Plus Medical Encyclopedia.

See also: Respiratory system.

Additional definitions from Google and OneLook.

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