#3404 UTILITY OF RENAL BIOPSY IN THE ETIOLOGY, MANAGEMENT AND OUTCOME OF POSTPARTUM ACUTE KIDNEY INJURY

Abstract

Abstract Background and Aims Acute kidney injury (AKI) is a serious complication during pregnancy and postpartum period resulting in significant maternal morbidity, mortality and fetal loss. Pregnancy related acute kidney injury is still more prevalent in developing countries. This study aims to evaluate renal biopsies in postpartum period AKI (PPAKI) with etiology and its management and outcome. Method Retrospective analysis of 83 native renal biopsies received in the department of pathology, SGPGIMS, Lucknow, a tertiary care center in India with PPAKI from January 2007 to December 2021 were analyzed. Clinical and laboratory data were retrieved and renal biopsy histology slides were reviewed. Results Eighty-three patients with mean age 27.5±4.6 years had biopsy proven PPAKI. Cesarian section, vaginal delivery, hysterectomy and abortion were performed in 51, 19, 2 and 11 patients respectively. The cause of AKI was sepsis (38.6%), postpartum hemorrhage (26.5%), thrombotic microangiopathy (TMA) (11%), pre-eclampsia (3.7%) and other (20%). Duration of onset of AKI after delivery/abortion ranged from 0 to 30 days (mean 4.5±6.3 days). Fetal loss was seen in 31.7% patients. Biopsy showed partial/complete renal cortical necrosis (56.6%), TMA (24.1%), acute tubular injury (ATI) (4.8%), Lupus nephritis flare in 3.6% and other glomerular diseases (8.4%) and Tubulointerstitial nephritis in (1.2%) patient. All received multiple sessions of haemodialysis and 10 patients also had plasmapheresis. During hospital stay one died due to sepsis and shock, remainder were discharged in a stable condition with complete recovery in (5), partially recovery in (7); and 61 (71%) patients required continued renal replacement therapy. Two patients died and two had subsequent live related renal transplantation on available follow-up. Conclusion AKI is a serious complication in postpartum period and require early and prompt attention to reduce fetal and maternal morbidity. Sepsis is the commonest cause of postpartum AKI