| OA/BVM | oral airway/bag-valve-mask |
|---|---|
| A/C | albumin/coagulin [ratio]; anterior chamber of eye; assist control [ventilation] |
| A2C | apical two-chamber [view] |
| A4C | apical four-chamber [view] |
| ac | acceleration; acetyl; acid; acromioclavicular; acute; alternating current; antecubital; anterior cha... |
| infant mortality rate | The number of children dying under a year of age divided by the number of live births that year. The infant mortality rate in the united states, which was 12.5 per 1,000 live births in 1980, fell to 9.2 per 1,000 live births in 1990. (12 Dec 1998) |
|---|---|
| infant, newborn | An infant during the first month after birth. (12 Dec 1998) |
| infant, newborn, diseases | Diseases of newborn infants present at birth (congenital) or developing within the first month of birth. It does not include hereditary diseases not manifesting at birth or within the first 30 days of life nor does it include inborn errors of metabolism. Both hereditary diseases and metabolism, inborn errors are available as general concepts. (12 Dec 1998) |
| infant nutrition | Nutrition of children from birth to 2 years of age. (12 Dec 1998) |
| infant nutrition disorders | Malnutrition, occurring in infants ages 1 month to 24 months, which is due to insufficient intake of food, dietary nutrients, or a pathophysiologic condition which prevents the absorption and utilization of food. Growth and development are markedly affected. (12 Dec 1998) |
| infant, postmature | An infant born at or after 42 weeks of gestation. (12 Dec 1998) |
| infant, premature | An infant born before 38 weeks of gestation. (12 Dec 1998) |
| infant, small for gestational age | An infant having a birth weight lower than expected for its gestational age. (12 Dec 1998) |
| infant, very low birth weight | An infant having a birth weight of 1500 grams (3.3 lb.) or less. (12 Dec 1998) |
| infant welfare | Organised efforts by communities or organizations to improve the health and well-being of the infant. (12 Dec 1998) |
| term infant | An infant with gestational age between 37 completed weeks (259 completed days) and 42 completed weeks (294 completed days). (05 Mar 2000) |
| liveborn infant | The product of a livebirth; an infant who shows evidence of life after birth; life is considered to be present after birth if any one of the following is observed: 1) if the infant breathes; 2) if the infant shows beating of the heart; 3) if pulsation of the umbilical cord occurs; or 4) if there is definite movement of voluntary muscles. (05 Mar 2000) |
| alveolar dead space | The difference between physiologic dead space and anatomical dead space; it represents that part of the physiologic dead space resulting from ventilation of relatively underperfused or nonperfused alveoli; it differs specifically in being placed so as to fill and empty in parallel with functional alveoli, rather than being interposed in the conducting tubes between functional alveoli and the external environment. (05 Mar 2000) |
| anatomical dead space | The volume of the conducting airways from the external environment (at the nose and mouth) down to the level at which inspired gas exchanges oxygen and carbon dioxide with pulmonary capillary blood; formerly presumed to extend down to the beginning of alveolar epithelium in the respiratory bronchioles, but more recent evidence indicates that effective gas exchange extends some distance up the thicker-walled conducting airways because of rapid longitudinal mixing. Compare: alveolar dead space, physiologic dead space. Synonym: anatomical airway. (05 Mar 2000) |
| antecubital space | The fossa in front of the elbow, bounded laterally and medially by the humeral origins of the extensors and flexors of the forearm, respectively, and superiorly by an imaginary line connecting the humeral condyles. Synonym: fossa cubitalis, antecubital space, chelidon, triangle of elbow. (05 Mar 2000) |