Clinic Versus the Operating Room: Determining the Optimal Setting for Dilation and Curettage for Management of First-Trimester Pregnancy Failure.

Introduction There is no clear guidance for the optimal setting for dilation and curettage (D&C) for the management of first-trimester pregnancy failure. Identifying patients at risk of clinically significant blood loss at the time of D&C may inform a provider's decision regarding the setting for the procedure. We aimed to identify risk factors predictive for blood loss of 200mL or greater at the time of D&C. Methods  This is a retrospective cohort study of patients diagnosed with first-trimester pregnancy failure at gestational age less than 11 weeks who underwent surgical management with D&C at a single safety net academic institution between 4/2016 and 4/2021. Patient characteristics and procedural outcomes were abstracted. Women with less than 200mL versus greater than or equal to 200mL blood loss were compared using descriptive statistics, chi-square for categorical variables, and Satterthwaite t-tests for continuous variables. Results A total of 350 patients were identified; 233 met inclusion criteria, and 228 had non-missing outcome data. Mean gestational age was 55 days (SD 9.4). Thirty-one percent (n=70) had estimated blood loss (EBL) ≥200mL. Younger patients (mean 28.7 years vs. 30.9, p=0.038), Latina patients (67.1% vs. 51.9%, p=0.006), patients with higher body mass index (BMI, mean 30.6 vs. 27.3 kg/m2, p=0.006), and patients with pregnancies at greater gestational age (59.5 days vs. 53.6 days, p<0.001) were more likely to have EBL ≥200mL. Additionally, patients with pregnancies dated by ultrasound (34.3% vs. 18.4%, p=0.007), those who underwent D&C in the operating room (81.4% vs. 48.7%, p<0.001), and those who underwent general anesthesia (81.4% vs. 44.3%, p<0.001) were more likely to have EBL ≥200mL. Discussion In this study, patients with EBL ≥200mL at the time of D&C differed significantly from those with EBL<200mL. This information can assist providers in planning the best setting for their patients' procedures.