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Risks and consequences of puerperal uterine inversion in the United States, 2004 through 2013

      Background

      Puerperal uterine inversion is a rare, potentially life-threatening obstetrical emergency. The current literature consists of small case series and a single nationwide study from Europe with only 15 cases.

      Objective

      We aimed to define the incidence, temporal trends, and outcomes in women with uterine inversion using a nationally representative US cohort.

      Study Design

      We used the Nationwide Inpatient Sample, a 20% sample of US hospital admissions, to identify all deliveries from 2004 through 2013. International Classification of Diseases, Ninth Revision diagnosis codes were used to identify cases of uterine inversion and associated adverse outcomes (maternal death, blood transfusion, maternal shock, need for surgical correction, and length of hospital stay). The incidence of uterine inversion overall and for each year of the study period was calculated with 95% confidence intervals. The case fatality and incidence of other adverse outcomes among women with a uterine inversion were also estimated.

      Results

      Among 8,294,279 deliveries in 2004 through 2013, there were 2427 cases of puerperal uterine inversion, corresponding to an incidence of 2.9 per 10,000 deliveries (95% confidence interval, 2.8–3.0). There was 1 maternal death in our cohort (4.1 per 10,000 events). No change in the incidence of uterine inversion over the study period was detected. Among women with a uterine inversion, 37.7% (95% confidence interval, 35.8–39.6%) had an associated postpartum hemorrhage, 22.4% (95% confidence interval, 20.7–24.0%) received a blood transfusion, and 6.0% (95% confidence interval, 5.1–7.0%) required surgical management. Only 2.8% (95% confidence interval, 2.1–3.5%) underwent a hysterectomy. The median length of hospital stay was 3 days.

      Conclusion

      This study provides the largest population-based results on puerperal uterine inversion to date and highlights the high likelihood of adverse maternal outcomes associated with the condition. The results inform the optimization of clinical management, by preparing for possible postpartum hemorrhage, need for blood products, and surgical management in the rare event of uterine inversion.

      Key words

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