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(ĕ-val″ū-ā′shŏn) [Fr évaluation] 1. A rating or assessment, e.g., of the accuracy of a diagnosis, the effectiveness of a plan of care, or the quality of care. 2. An appraisal of the health or status of an individual, based on specific criteria. 3. A clinical judgment. SEE: nursing assessment; nursing intervention; nursing process; planning; problem-oriented medical record.

evaluation and management coding

ABBR: E&M coding. In U.S. health care, a system of medical billing that health care providers must use for reimbursement by Medicare, Medicaid, or private insurance carriers.


(ĕv″ă-nĕs′ĕnt) [L. evanescere, to vanish] Not permanent; of brief duration.

Evans blue

(ĕv′ănz) [Herbert M. Evans, U.S. anatomist, 1882–1971] A diazo dye occurring as a blue-green powder, very soluble in water. It is used intravenously as a diagnostic agent.

Evans syndrome

[Robert S. Evans, U.S. physician, b. 1912] An autoimmune disease characterized by thrombocytopenia and hemolytic anemia.


(i-vap″ŏ-rā′shŏn) [L. evaporare, to disperse in steam] 1. Change from liquid to vapor. 2. Loss in volume due to conversion of a liquid into a vapor. evaporate (i-vap′ŏ-rāt″), v. evaporative (i-vap′ŏ-rāt″iv), adj.


(ē-vĕn″ō-mā′shŭn) [L. ex, from, + venenum, poison] Removal of venom from a biting insect or reptile; removal of venom from the victim of a bite.


(ē″vĕn-trā′shŭn) [L. e, out, + venter, belly] 1. Partial protrusion of the abdominal contents through an opening in the abdominal wall. 2. Removal of the contents of the abdominal cavity.

event recorder

A portable heart rhythm monitor worn by a patient who suffers intermittent palpitations or loss of consciousness of unclear cause. The device transmits the patient’s heart rhythms by telephone to a central laboratory, where symptomatic and asymptomatic dysrhythmias (such as atrial fibrillation and atrioventricular nodal re-entrant tachycardias) or heart blocks can be detected.

events odds ratio

Odds ratio.


(ē-vĕr′zhŭn) [″ + vertere, to turn] Turning outward. SEE: cheilectropion.


(ĕ-vĕrt′) [L. evertere, to turn upside down, overturn] To turn outward.

Everything Added to Food in the United States

ABBR: EAFUS. An inventory of the more than 3000 food additives included in human food in the U.S.


(ā-vēd-mŏn′) [Fr., a scooping out] Scraping away of diseased tissue.


1. In forensic medicine, all the tangible items and record materials pertinent to ...

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