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Laughing gas
Laughing gas Nitrous oxide; odorless inhalation agent that produces relative analgesic (sedation); reduces anxiety and creates a state of relaxation.
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Analgesic
drug that relieves pain. With an effective analgesic, there is an inability to feel pain while still conscious. From the Greek an-, without + algesis, sense of pain.
Anxiety
A psychological and/or biological response to stress. Feelings of anxiety involve discomforting apprehension or concern, which may include symptoms such as cognitive difficulties, hypersensitivity, dizziness, muscular weakness, breathing difficulties, irregular heart beat, sweating, and sensations of fear. Typically, anxiety is a natural and healthy response to life experiences. However, exaggerated or chronic anxiety often indicates an anxiety disorder. Anxiety can be produced by external stress (exogenous anxiety) or internal stress (endogenous anxiety).
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Lumpectomy
Surgical removal of a small cancerous or non-cancerous tumor; generally used to refer to removal of a breast lump.
Levodopa
L-dopa. The single most effective anti-Parkinson drug, it is changed into dopamine in the brain.
Lewy body
A pink-staining sphere, found in the bodies of dying cells, that is considered to be a marker for Parkinson's disease.
Lordosis
An exaggeration of the forward curve of the lower part of the back, sometimes called sway-back.
Laminate
Thin plastic or porcelain veneer produced in a dental laboratory and then bonded to a tooth.
Laughing gas
Lesion
Injury of bodily tissue due to infection, trauma or neoplasm
Local anesthesia
Partial or complete elimination of pain sensation, in the immediate vicinity of its application or injection.
Laminectomy
Operation to remove prolapsed disc - involves removal of part of a vertebra.
Lasegue sign
Pain in the back of the leg on flexing a patient's hip and knee and then extending the knee while the hip is flexed. Results from dural irritation, usually by a prolapsed disc.
Lesch-Nyhan syndrome
Results from congenital deficiency of hypoxanthine guanine phosphoribosyl transferase (HGPRT) - resulting in hyperuricaemia. Causes gout (even in a baby), mental retardation and choreoathetosis.
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