Analysis Of Risk Factors For Preterm Labor In 220 Obstetric Cases

Preterm labor is common in clinical obstetric complications, and its definition changes with the passage of time. WHO provided a standard definition of the current implementation in 1964, Preterm labor is diagnosed as delivery between 28 weeks and 37 weeks, birth weight 1000-2499g. We used this definition in our country. According to the information available about the incidence of PTL is 5% -15%, and mortality rate for premature infants 5.0‰-9.0‰in western developed countries, which was higher in developing countries, the domestic coverage of 12.7%-20.8%.In recent years, with a wide range of work carried out and obstetric interventions increased, the mortality of premature infants has decreased, and even low birth weight infants can be long-term survival, but the incidence of PTL has not declined, this may be related to the development of assisted reproductive technology and the popularity of a rising incidence of multiple births, as well as the increase choice of cesarean section due to maternal and child factors. Therefore under the conditions of modern life to explore the incentives of PTL risk factors is hot for modern obstetricians. Study shows that a large number of PTL is the result of a great many factors, according to epidemiological investigations abroad, women with low socio-economic levels, age less than 18 years old, more than 40 years old, an excessive amount of smoking, drug abuse, alcoholism bad habits are prone to PTL. The most important reason is for infection, accounting for about 40%.other reasons including premature rupture of membranes, twin or multiple births, polyhydramnios, primary cervical insufficiency or as a result of previous productivity or improper obstetric surgery, a single horn of uterus, uterine mediastinal, double uterus, as well as in a number of pregnancy complications such as placenta previa, placental abruption, pregnancy induced hypertension and pregnancy complications, such as with heart disease, chronic nephritis, etc, as to endanger the lives of mothers and infants so that needed to have a timely termination of pregnancy.Objective: To explore the risk factors for premature birth in modern society, and their mode of delivery and perinatal impact. and find the early prediction of preterm delivery, the correct diagnosis and reasonable treatment.Method: Refer to the risk factors for preterm delivery including epidemiological investigation projects and a number of recently reported possible risk factors which are combined with China's specific national conditions, pick up 220 cases who were hospitalized in First Hospital of Jilin University from January in 2005 to November in 2008, do control study in 131 patients who were diagnosed of PTL and 89 cases with the same conditions who were full-term deliver. The risk factors such as age, pregnancy times, the history of abortion, premature rupture of membranes, pregnancy hypertension, placental abruption, placenta previa, intrauterine infection, polyhydramnios, thrombocytopenia in pregnancy, gestational diabetes mellitus, renal disease, uterine scarring, anemia, multiple births and other factors, count data between the two groups analyzed with t test, measurement data withχ2 test by SPSS software.Taking P <0.05 statistical significance.Result: Preterm labor group and control group compared to the situation in general: age in the two groups has no significant difference (p>0.05). patients with a history of abortion (≥2 times) whose incidence of premature delivery was significantly higher, the difference was significant. Comparison of risk factors: premature rupture of membranes, pregnancy hypertension, intrauterine infection on the impact of the two groups were significantly different (p<0.05) and placental abruption, placenta previa, polyhydramnios, multiple births on the impact of the two groups have no significant difference(p>0.05).The impact of mode of delivery: cesarean section rate between the two groups has no significant difference (p>0.05). The impact of mode of perinatal: the incidence of fetal growth restriction and fetal distress was significant different(p<0.05) the incidence of stillbirth was not significant different p>0.05).The risk factors for contact: the elderly, frequent miscarriage, premature rupture of membranes, pregnancy hypertension, placental abruption, intrauterine infection are independent risk factors for PTL (p<0.05).Conclusion: The elderly, frequent miscarriage, premature rupture of membranes, pregnancy hypertension, placental abruption, intrauterine infection are all independent risk factors for PTL. The mode of delivery for patients in our hospital was not significantly different. The incidence of fetal growth restriction, fetal distress was significantly increased in PTL.