Résumé
Objective To discuss curative effect between ritodrine hydrochloride and magnesium sulfate treated with threatened premature labor and its effect to fetal fibronectin .Methods 368 cases threatened premature labor puerperants were selected and randomly divided into the ritodrine hydrochloride treatment group ( short for obser-vation group) and magnesium sulfate treatment group (short for control group),The two group puerperants′curative effect,changes of fetal fibronectin positive rate and safety evaluation were observed .Results Compared with the con-trol group,the observation group′s medicine effect time ,treatment failure proportion obviously decreased;prolongation pregnancy days,treatment success proportion obviously increased ,the differences all had statistical significances (t=103.4,9.6,χ2 =12.0,all P0.05);after the treatment,the observation group′s fFN positive rates was 28.26%,wich of the control group was 42.39%,compared the two groups′fFN positive rates,the observa-tion group obviously decreased ,the differences had statistical significances (χ2 =8.0,P <0.05).The observation group′s untoward effect rate was 1 9 .5 7%, which was lower than that of the control group (χ2 =4 .8 , P<0 .0 5 ) .Conclusion Ritodrine hydrochloride treated with threatened premature labor not only can get good treatment effect , shorten medicine effect time ,prolong pregnancy days;but also can obviously decrease fetal fibronectin positive rate , which has good safety ,and is suitable for clinical application .