A shunt is a drainage tube inserted into the brain to treat hydrocephalus, a disorder in which cerebrospinal fluid builds up in the brain cavities. The shunt diverts the excess fluid to another part of the body where it can be absorbed into the bloodstream. The fluid is released through a valve when pressure increases and drains into either the abdominal cavity or, rarely, a chamber in the heart.
From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.
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