Abstract：Objective To analyze the risk factors of shoulder dystocia and provide reference for clinical prevention of shoulder dystocia.Methods A total of 22 665 cases of full-term pregnancy,single fetus,head position and vaginal delivery in the department of obstetrics and gynecology in our hospital from January 2009 to January 2018 were collected,of which 55 cases of shoulder dystocia(shoulder dystocia group)were found.Then,the study randomly selected 110 patients(control groups)from the remaining patients who did not have shoulder dystocia and collected clinical data of all patients.Clinical data were collected and Logistic regression analysis was used to analyze risk factors for shoulder dystocia.Results Form January 2009 and January 2018,the rate of shoulder dystocia in our hospital was 0.24%.Then univariate analysis showed that the factors such as uterine height,abdominal circumference,first stage of labor,second stage of labor,combined with diabetes(including gestational diabetes mellitus),birth weight,length and chest circumference were the influencing factors of shoulder dystocia (P＜0.05）.Gestational age,head circumference did not affect the shoulder dystocia(P＞0.05）.Further use of Logistic regression test showed that diabetes mellitus(including gestational diabetes mellitus）,second stage of labor,abdominal circumference,body weight,uterine height,first stage of labor,body length and chest circumference were risk factors for shoulder dystocia and their risk decreased in turn (P＜0.05）.Conclusion Due to the multiple factors of maternal and fetal factors,shoulder dystocia is recommended to correctly predict and manage the occurrence of shoulder dystocia according to the actual situation and high risk factors of shoulder dystocia.
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