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Head injury
Head injury Traumatic injuries involving the cranium and intracranial structures. Injuries may be classified by whether or not the skull is penetrated (i.e., penetrating vs. nonpenetrating) or whether there is an associated hemorrhage.
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Cranium
The skull, or bony structure of the head, that protects the brain.
Intracranial
Within the skull.
Skull
The bony framework of the head.
Hemorrhage
A general term for loss of blood, often profuse, brought about by injury to the blood vessels or by a deficiency of certain necessary blood elements such as platelets.
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Head and shoulders conditioner
Head and shoulders conditioner is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): pyrithione zinc.
Head Upright Tilt Test (HUT, tilt table test, head-up tilt test)
A test used to determine the cause of fainting spells. The test involves being tilted at different angles for a period of time. Heart rhythm, blood pressure, and other measurements are evaluated with changes in position.
Headache
Primary - includes tension (muscular contraction), vascular (migraine), and cluster headaches not caused by other underlying medical conditions. Secondary - includes headaches that result from other medical conditions. These may also be referred to as traction headaches or inflammatory headaches.
Headache-primary
Includes tension (muscular contraction), vascular (migraine), and cluster headaches not caused by other underlying medical conditions.
Headache-secondary
Includes headaches that result from other medical conditions. These may also be referred to as traction headaches or inflammatory headaches.
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Hyphema
Blood in the aqueous fluid - front part of the eye, often caused by an injury. Patient should seek immediate medical attention since a hyphema may lead to glaucoma and permanent loss of vision.
Hydroxyzine
A tranquilizer.
Haloxazolam
A hypnotic drug.
Haloperidol
An antipsychotic substance.
Hemochromatosis
A disorder due to the deposition of hemosiderin in the parenchymal cells, causing tissue damage and dysfunction of the liver, pancreas, heart, and pituitary. Full development of the disease in women is restricted by menstruation, pregnancy, and lower dietary intake of iron. Acquired hemochromatosis may be the result of blood transfusions, excessive dietary iron, or secondary to other disease. Idiopathic or genetic hemochromatosis is an autosomal recessive disorder of metabolism associated with a gene tightly linked to the A locus of the HLA complex on chromosome 6.
Head injury
Heartburn
Substernal pain or burning sensation, usually associated with regurgitation of gastric juice into the esophagus.
HIV
Human immunodeficiency virus. Species of lentivirus, subgenus primate lentiviruses (lentiviruses, primate), formerly designated T-cell lymphotropic virus type III/lymphadenopathy-associated virus (HTLV-III/LAV). It is acknowledged to be the agent responsible for the acute infectious manifestations, neurologic disorders, and immunologic abnormalities linked to the acquired immunodeficiency syndrome.
Hemorrhoids
Enlarged veins protruding into the anorectal area, either internal or externally visible. They are either the result of poor sphincter tone and portal congestion, or sphincter hypertonicity, skeletal muscle and adrenergic excess.
HLA complex
See 'Major histocompatibility complex'.
H-2 complex
The major histocompatibility complex situated on chromosome 17 of the mouse; contains subregions K, I and D.
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