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mask

mask

1. Any of a variety of disease states producing alteration or discoloration of the skin of the face. 2. The expressionless appearance seen in certain diseases; e.g., Parkinson's facies. 3. A facial bandage. 4. A shield designed to cover the mouth and nose for maintenance of antiseptic conditions. 5. A device designed to cover the mouth and nose for administration of inhalation anesthetics, oxygen, or other gases.
ecchymotic m. a dusky discoloration of the head and neck occurring when the trunk has been subjected to sudden and extreme compression, as in traumatic asphyxia.
Hutchinson's m. the sensation experienced in tabetic neurosyphilis as if the face were covered with a m. or with cobwebs.
laryngeal m. a tubular oropharyngeal airway with an inflatable rim at the distal end that when inflated creates an airtight seal immediately above the larynx.
luetic m. a dirty brownish yellow pigmentation, blotchy in character, resembling that of chloasma, occurring on the forehead, temples, and sometimes the cheeks in patients with tertiary syphilis.
nonrebreathing m. a m. fitted with both an inhalation valve and an exhalation valve so that all exhaled gas is vented to the external atmosphere and inhaled gas comes only from a reservoir connected to the m.
m. of pregnancy melasma
tropical m. chloasma bronzinum

 

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