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Hydatid (disease)

Hydatid (disease) Quick Reference: (hi-dat-id) Infection with a type of tapeworm.

Advanced Reference: The disease usually forms cysts mainly in the liver and lungs which need to be removed surgically. The cysts are formed by the larvae of the tapeworm and passed on from dogs to other animals, e.g. sheep or via contact. The cysts may become infected or burst and set off an anaphylactic reaction.

Hydralazine Quick Reference: Vasodilator.

Advanced Reference: Used for treatment of both acute and chronic hypertension. Alternative name is apresoline. Can be administered orally or IV. Used for treatment of both acute and chronic hypertension.

Hydration Quick Reference: A chemical process in which water is added without disrupting the rest of the molecule.

Advanced Reference: Refers to the amount (adequate or otherwise) of water in the intracellular and extracellular compartments of the body. To hydrate is to provide fluid and to rehydrate is to replace fluid.

Hydrocele Quick Reference: (hydro-seal) Collection of fluid surrounding the testicle.

Advanced Reference: The fluid collects in the sac (tunica vaginalis). Occurs with no obvious cause. Treatment can be through aspiration but as incidence of re-occurrence is high, surgery for removal of the sac is the normal course of treatment.

Hydrocephalus Quick Reference: (hydro-cef-alus) Accumulation of cere-brospinal fluid (CSF) in the ventricles of the brain.

Advanced Reference: Caused by obstruction through the ventricles and into the arachnoid space or failure of absorption. Causes include meningitis, adhesions.

Hydrochloric acid Quick Reference: HCl, found in normal gastric juices in dilute form.

Advanced Reference: Formed from a solution of hydrogen gas and water.

7 Hydrocortisone Quick Reference: Hormone secreted from the adrenal cortex.

® Advanced Reference: A corticosteroid used for replacement therapy and suppression of allergic and inflammatory reactions.

■E Hydrogen Quick Reference: Chemical symbol H.

E Advanced Reference: A gaseous element, colourless, odourless and highly

« inflammable. Combines with oxygen to form water (H2O). Hydrogen ion a concentration indicates the acidity or alkalinity (pH) of a solution.

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