| 释义 |
nonstress test
non·stress test N5166300 (nŏn′strĕs′)n. An ultrasound examination of a fetus that measures fetal well-being by correlating fetal movement with changes in fetal heartbeat.
EncyclopediaSeetestnonstress test
nonstress test (NST) [non-stres´] evaluation of fetal well being during the intrauterine period. Observations of fetal heart rate response to fetal movements are made: a reactive pattern of more than 15 beats per minute above the baseline heart rate twice in 10 minutes is indicative of well being; a nonreactive pattern may indicate asphyxia, maternal medication, fetal anomalies, or a prolonged rest state. See also fetal monitoring.non·stress testa test to evaluate fetal well-being by evaluating fetal heart rate response to fetal movement; a reactive nonstress test is fetal heart rate acceleration in response to fetal movement.nonstress test (nŏn′strĕs′)n. An ultrasound examination of a fetus that measures fetal well-being by correlating fetal movement with changes in fetal heartbeat.nonstress test Obstetrics An indirect non-invasive monitor of the well-being of a fetus, where the frequency of fetal movement, degree of heart rate acceleration and beat-to-beat variation of the heart rate are monitored to determine the 'health' of the placental vasculature. See Deceleration, Montevideo units. Cf Fetal heart monitoring, Stress test. LegalSeeTest |