To explore the diagnosis and treatment of pernicious placenta previa complicated with placenta accrete, in order to decrease operation hemorrhage and hysterectomy rate.

We conducted a retrospective study at 52 pregnant women with pernicious placenta previa, who were treated at the Maternity and Child Health Care Hospital of Foshan City from January 2008 to October 2012. This study reviewed the incidence rates, diagnosis and treatment.

(1) Among the 52 patients, 19 were diagnosed pernicious placenta praevia with placenta implantation; the incidence rate was 36.5%; while 8 patients were pernicious placenta praevia with placenta percreta, which incidence rate was 15.4%. (2) Ten patients were diagnosed by color Doppler ultrasound before operation; the diagnosis rate was 52.6%. (3) Vascular hyperplasia expansion of bladder mucosa were seen through cystoscopy in placenta accrete invade in the bladder. (4) Hysterectomy was used in 4 cases(7.7%), and 48 cases(92.3%) were preserve utero.

(1) Color Doppler ultrasonography and cystoscopy can improve the diagnosis rate of pernicious placenta previa. (2) It is the effective way to reduce bleeding and hysterectomy rate of pernicious placenta previa cases applying appropriate incision of cesarean section on placental edge combining ligating ascending uterine artery, internal iliac artery and B-Lynch suture.