NST test

The NST test refers to the change in fetal heart rate after fetal movement without uterine contractions and other external load stimuli. Place the fetal heart probe in the loudest position of the fetal heart (the back of the tire) and place the contraction probe on the flat bottom of the palace. Pregnant women hold the fetal movement button. When there is fetal movement, press the button to make a mark on the tracing paper. Pregnant women in the semi-recumbent position and the left side of the 15 degrees, to prevent orthostatic hypotension, relax the body, and actively cooperate with the doctor. Basic Information Specialist classification: maternity inspection inspection classification: other inspection Applicable gender: whether women are fasting: not fasting Analysis results: Below normal: Bradycardia Normal value: Normal fetal heart rate: 120-160 minutes Above normal: 1, tachycardia > 160bpm lasted 10 minutes, > 180bpm for moderate fetal tachycardia. 2, tachycardia> 160bpm lasted 10 minutes, need to measure the body temperature and pulse of pregnant women. negative: Positive: Tips: Pregnant women do not use sedatives within 12 hours before the examination, avoid fasting, emotional stability, and stable blood pressure. Normal value Normal fetal heart rate is 120~160 beats/min; The fetal heart rate averaged 162 beats/min before the 20th week of pregnancy; In the 21 to 30 weeks of pregnancy, the average is 147 times / minute; On the 31st to 40th week of pregnancy, the average was 139 times / minute. Clinical significance Abnormal result Tachycardia > 160bpm lasts 10 minutes, > 180bpm is moderate fetal tachycardia. Bradycardia <120bpm lasted 10 minutes, <100bpm, for moderate fetal bradycardia. The tachycardia >160bpm lasts 10 minutes and the body temperature and pulse of the pregnant woman need to be measured. People who need to be checked High-risk pregnancies, especially pregnancy-induced hypertension, overdue pregnancy, diabetes, heart disease, threatened premature delivery, polyhydramnios, oligohydramnios, intrauterine growth retardation, advanced primipara, multiple pregnancy, past stillbirth, etc.; Abnormal fetal movement; pregnant women with placental dysfunction. Precautions Before the test: do not use sedatives within 12 hours, avoid fasting, emotional stability, and stable blood pressure. At the time of examination: pregnant women in the semi-recumbent position and the left side of the 15 degrees, to prevent orthostatic hypotension, relax the body, and actively cooperate with the doctor. Inspection process Place the fetal heart probe in the loudest position of the fetal heart (the back of the tire) and place the contraction probe on the flat bottom of the palace. Pregnant women hold the fetal movement button. When there is fetal movement, press the button to make a mark on the tracing paper. Not suitable for the crowd Inappropriate crowd: No. Adverse reactions and risks Nothing.