Ultrasound-Guided diuretics may cut postpartum preeclampsia readmissions

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: Historical cohort (group 1): * Age greater than or equal to 18 years at the time of delivery * Diagnosis of preeclampsia (without severe features, with severe features, HELLP syndrome, eclampsia) during pregnancy * Gestational age greater than or equal to 20 weeks' gestation at delivery * Delivery at the study institution within the 18-month period prior to implementation of the study's POCUS intervention * Available and complete postpartum clinical data on: Daily blood pressure, diuretic or antihypertensive use, length of postpartum hospital stay, readmission within 30 days of primary hospitalization Prospective cohorts (groups 2 and 3): * Age greater than or equal to 18 years at the time of enrollment * Diagnosis of preeclampsia (without severe features, with severe features, HELLP syndrome, eclampsia) made up until 24 hours postpartum Postpartum and within 24 hours of delivery Exclusion Criteria: Historical cohort (group 1): * Delivery at an outside facility or incomplete postpartum records available for analysis * Pre-existing diagnosis of chronic hypertension; selected to mirror prospective cohort exclusion criteria (see below). * Documentation of chronic kidney disease (CKD stage 3 or higher); selected because diuresis is more likely to be avoided in this patient population even in the presence of physical exam findings suggesting volume overload. * Documentation of postpartum complications unrelated to preeclampsia that may significantly alter hemodynamics (e.g., sepsis, postpartum hemorrhage); selected because diuresis is more likely to be avoided in this patient population even in the presence of physical exam findings suggesting volume overload. Prospective cohorts (groups 2 and 3): * Pre-existing diagnosis of chronic hypertension; selected because previous studies on furosemide use in patients with postpartum preeclampsia have found a significant reduction in hypertension among patients with newly diagnosed hypertensive disorders of pregnancy, but not among those with pre-gestational hypertension, meaning that inclusion of this population might reduce the magnitude of study effects. * Baseline renal dysfunction with serum creatinine \> 1.1 mg/dL; selected as this laboratory finding has been pre-selected as a safety outcome. * Baseline hypokalemia with serum potassium \< 3.5 mEq/L despite previous repletion with intravenous or oral potassium chloride; selected as this laboratory finding has been pre-selected as a safety outcome. * Known hypersensitivity to furosemide or sulfa drugs; selected because this would preclude exposure to the study medication of interest. * Current use of diuretics for other indications (e.g. heart failure); selected because this may require a furosemide or other diuretic regimen different from that planned for the study intervention.