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KMID : 0376419840080010201
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Chonbuk University Medical Journal
1984 Volume.8 No. 1 p.201 ~ p.207
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Clinical significance of the nonstress test in high-risk pregnancy.
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Abstract
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During the 6 months from July 1982 to December 1982 108 nonstress test (NST) were performed in high-risk pregnant women. The length of the gestational period ranged from 31 to 45 weeks.
The results of this study were as follows.
1. The common indications for NST were post-datism(30.3%) and pregnancy induced hypertension (28.4%)
2. The reactive patterns were noted in 76 cases (70.4%) , nonreactive in 24 cases (22.2) and unsatisfactory in 8 cases (7.4%).
3. Contraction stre%s test(CST) was subsequently performed on 55cases. From 36 cases with the NST reactive pattern, 33 cases (91.7%) showed negative CST. The result suggested to high corelationship between NST reactive and CST negative.
4. C-section due to intrapartum fetal distress was done 4 cases (6.8%) in reactive pattern and 6 cases (28.6%) in nonreactive pattern (p<0.01).
5. Perinatal morbidity rate was more increased in nonreactive pattern than reactive pattern, (p<0.01)
6. Neonatal death was found 1 case among the 59 reactive cases, and 2 cases among the 21 nonreactive cases.
In 4 unsatisfactory cases, 1 neonatal death and 1 IUFD were found.
The NST is simple, physiologic and inexpensive fetal surveillent method. There are no contraindications to the NST and the reactive NST is very reliable as a sign of fetal well being.
True nonreactive late was 9.5% in this study, which was meant very high false positive result of the NST. If the high false positive rate in NST is corrected, the NST will be the most ideal method for the evaluation of antepartum fetal well being.
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