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Paper Information

Journal:   JOURNAL OF ISFAHAN MEDICAL SCHOOL (I.U.M.S)   Summer 2004 , Volume 22 , Number 73; Page(s) 1 To 3.
 
Paper: 

EVALUATION OF THE RESULTS OF NONSTRESS TEST IN TWO POSITIONS IN HIGH RISK PREGNANT WOMEN AT 32 TO 42 WEEKS OF PREGNANCY

 
 
Author(s):  ROGHAEI M.A., YADEGARI A.
 
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Abstract: 

Introduction. Nonstress test (NST) is a way to evaluate fetal well being. It is based on acceleration of fetal heart rate during fetal movement and in high risk pregnancies such as: post date pregnancy, Diabetes mellitus, PIR, oligohydramnious and polyhyramnious should be done two or more times a week, based on patient condition. Because sleeping periods of fetus is one of the most causes of nonreactive results. Sometimes we need to continue the test 40 to 90 minutes to see the acceleration. So if changing the position can cause more reactivity the test will be more valid. This study was performed to know the effects of maternal position on the NST results and determine the best position for NST.
Methods. This is a clinical trial study. 125 patients entered the study by easy sampling. The high risk patients at 32 to 42 weeks of pregnancy who referred to Alzahra and Shahid Beheshti Medical Centers for prenatal care from 2000 to 2001. NST was done two times for each patient. In the first time patients were in semifowler position on the 10 minutes and then in left latral position for 10 minutes and in the second time the patients were left lateral position in first 10 minutes and then in semifowler position. The interval between the tests were one day to one week, analysis of wilcoxone and MC-nemur were used for statistical analysis.
Results. In the first time in semifowler position %68 of tests were reactive and in left lateral 64/8% were reactive. The difference was not significant (P=0.667). In The second time the results were positive in semifowler position 64.8% and in left lateral position 48.8%. The difference was significant (P=0.006). Totally reactive results in all nonstress tests in semifowler position were 42.8% and in left lateral 37.6% (P=0.005) the difference was significant.
Discussion. There is a relation between maternal position and nonstress test results and there are more reactive results in semifowler position. In a same study by Haberman in New York (1999) the semifowler position was the best position.

 
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