Pregnancy-related Acute Kidney Injury Research Articles

#2977 Pregnancy-related acute kidney injury in a second level care hospital in Merida, Yucatan, Mexico

Abstract Background and Aims Pregnancy-related acute kidney injury (PRAKI) is a public health problem associated with an increased risk of adverse maternal and fetal outcomes. The causes of PRAKI varies according to the age of gestation. Mexico lacks a national acute kidney injury (AKI) registry, and the access to AKI treatment is limited due to lack of financial coverage, lack of nephrologists, and poor infrastructure. The General Hospital Dr. Agustín O'Horán is a second level unit that attends to the uninsured pregnant population from the southeast of Mexico. The aim of this study was to investigate the prevalence, clinical characteristics, and outcomes of PRAKI in a Mexican population. Method This was a retrospective study in an obstetric intensive care unit (OICU) in the General Hospital Dr. Agustín O'Horán in Merida, Yucatan, Mexico. Women during pregnancy and postpartum periods admitted to the OICU between January to December 2023 were included. Demographical, clinical and laboratory data were collected from medical records, and AKI was diagnosed according to the Kidney Disease Improving Global Outcomes (KDIGO) creatinine criteria. We evaluated the prevalence, clinical characteristics, and outcomes of PRAKI. Results During the study period, 188 women were admitted to the OICU, and the mean age was 24.9 years. Eight women presented in the first trimester, 19 in the second trimester, 21 in the third trimester, and 140 in the postpartum period. Fifty-five women met AKI creatinine criteria: 31 (56.3%) had stage 1, 15 (27.3%) had stage 2, and 9 (16.4%) had stage 3. The most common causes of PRAKI were obstetric hemorrhage (27.3%), eclampsia (21.8%), and preeclampsia (18.2%) (Table 1). There was no difference in vital signs on admission and baseline creatinine level between both groups. Women who developed PRAKI had a longer stay in the OICU (4.2 days vs 2.3 days, p < 0.001), and greater use of vasopressor (30.9% vs 9.0%, p < 0.001), and mechanical ventilation (34.5% vs 11.3%, p < 0.001). Women with AKI had higher mortality (9.1% vs 1.5%, p = 0.012), and perinatal mortality (9.1% vs 2.3%, p = 0.035) (Table 2). Conclusion Women during pregnancy and postpartum periods who developed PRAKI had more adverse clinical and obstetric outcomes (maternal and perinatal mortality). Hence, women in pregnancy and postpartum periods admitted to an intensive care unit should be closely monitored and implement strategies for early diagnosis and aggressive therapy of PRAKI regardless of KDIGO stage.

Characteristics and outcome of pregnancy-related acute kidney injury in a teaching hospital in a low-resource setting: a five-year retrospective review.

Pregnancy-related kidney injury contributes to a high burden of acute kidney injury in low-resource settings and causes maternal and perinatal morbidity and mortality. Few studies have examined the impact of acute kidney injury in resource-limited countries, with very limited research on pregnancy-specific disorders in Ethiopia. This study aimed to determine the characteristics of pregnancy-related acute kidney injury, outcomes and associated factors. A retrospective study was conducted to evaluate the clinical profile and maternal-fetal outcome of pregnancy-related acute kidney injury at Ayder Comprehensive Specialized Hospital in Tigray, Ethiopia, from January 1, 2017, to December 31, 2021. Maternal and fetal outcomes were analyzed using descriptive statistics. Multivariate logistic regression was used to determine the association between the dependent and independent variables. Of 27,350 mothers who delivered at Ayder Comprehensive Specialized Hospital between January 1, 2017, and December 31, 2021, a total of 187 women developed pregnancy-related acute kidney injury, a prevalence rate of 68 per 100,000 births. Preeclampsia, sepsis and pre-renal causes due to dehydration and hemorrhage were the most common causes of pregnancy-related acute kidney injury in this study. Hemodialysis was needed in 8.6% (n = 16) of patients. Of the 187 pregnancy-related acute kidney injuries, 143 (76.5%) recovered completely and 30 (16%) partially. The mortality rate was 7.5%. Preexisting chronic kidney disease (AOR = 30.13; 95% CI: 2.92, 310.84), use of vasoactive agents (AOR = 5.77; 95% CI: 1.47, 22.67), increase in creatinine per unit (AOR = 1.65; 95% CI: 1.11, 2.45) and complications related to acute kidney injury (AOR = 5.26; 95% CI: 1.73, 16.00) were determinants of the composite endpoints (partial renal recovery and death). This study emphasizes acute kidney injury in resource-limited settings is a significant cause of maternal and fetal morbidity and mortality. The vast majority of patients with pregnancy-related acute kidney injury recovered completely from kidney injury. The main causes of pregnancy-related acute kidney injury were preeclampsia, sepsis and pre-renal associated with hemorrhage and dehydration. Preexisting renal disease, use of vasopressors, increase in creatinine per unit and complications associated with acute kidney injury were determining factors for concomitant fetomaternal mortality. Appropriate preventive strategies during prenatal care and prompt treatment are needed for pregnancy-related acute kidney injury.

Acute Kidney Injury in Pregnancy: A Prospective Study.

When acute kidney damage occurs during pregnancy, it poses a difficult clinical problem. One of the main causes of maternal and fetal morbidity and death is pregnancy-related acute kidney injury (AKI), a significant obstetric complication characterized by a fast deterioration in renal function and several subsequent clinical problems. The objective of the study is to analyze the etiological factors, clinical manifestations, and maternal and fetal outcomes of AKI during pregnancy. This prospective observational research involved patients hospitalized in the General Medicine and Obstetrics and Gynecology departments at Indira Gandhi Institute of Medical Sciences, Patna, for a year (October 2021 to September 2022) due to obstetric difficulties resulting in acute renal damage. The study included 62 patients with a mean age of 25.08±4.25 years. The majority of patients in our study were aged 18-25 years (38, 61.3%), followed by 26-30 years (19, 30.6%) and >30 years (5, 8.1%). The majority of patients in our study were non-booked (52, 83.9%) and presented as emergency cases, whereas 10 (16.1%) patients had booked. In addition, 34 (54.8%) patients were primigravida, while 28 (45.1%) were multigravida. There were 25 patients in their third trimester (40.3%), 19 who were postpartum (30.6%), 10 who were post-abortion (16.1%), and eight in their second trimester (12.9%). Upon admission, the majority of the patients showed signs of oliguria, accounting for 45 cases (72.6%). This was followed by nine cases of abnormal kidney function (14.5%) and eight cases of anuria (12.9%). Among the other symptoms, fever was observed in 25 cases (40.32%), whereas breathlessness increased to 15 cases (24.19%), edema was present in 14 cases (22.58%), vomiting and altered sensorium were observed in four cases (6.45%), abdominal pain was observed in three cases (4.83%), and burning micturition was observed in two cases (3.22%). The most common causes of AKI in pregnancy in the present study were puerperal sepsis (18 cases, 29.0%), followed by preeclampsia/eclampsia (14 cases, 22.6%), hemorrhagic shock (10 cases, 16.1%), septic abortion (six cases, 9.7%), hyperemesis gravidarum (four cases, 6.5%), acute fatty liver of pregnancy (three cases, 4.8%), disseminated intravascular coagulation (three cases, 4.8%), drug-induced sepsis (two cases, 3.2%), and urosepsis (two cases, 3.2%). Modes of delivery in this study were normal vaginal delivery (32 cases, 51.6%), lower segment cesarean section (21 cases, 33.9%), dilation and evacuation (seven cases, 11.3%), and total hysterectomy (two cases, 3.2%). Hemodialysis was performed in 39 patients (62.9%), and 51 (82.3%) received blood transfusions. The mean systolic and diastolic BP (mmHg) were 111.37±22.60 and 71.40±18.88, respectively. Maternal outcome data revealed that 48 (77.4%) women had fully recovered, eight (12.9%) had not recovered, 43 (69.4%) were lost to follow-up, and two (3.2%) had died. Neonatal outcomes in the present study were as follows: live birth, 43 (69.4%); abortion, eight (12.9%); intrauterine death of the fetus, five (8.1%); and neonatal mortality, six (9.7%). The diagnosis and treatment of AKI during pregnancy is a significant challenge for the treating physician because of the pathophysiological changes that occur during pregnancy, the variability of symptoms, and the fact that clinical and laboratory features may occasionally overlap.

WCN24-2058 Point-of-care creatinine testing for early detection of pregnancy related acute kidney injury in Sierra Leone. A case report

WCN24-2058 Point-of-care creatinine testing for early detection of pregnancy related acute kidney injury in Sierra Leone. A case report

Maternal Mortality due to Pregnancy-Related Acute Kidney Injury (PRAKI); A Study of the Epidemiological Factors and Possible Solutions

Maternal Mortality due to Pregnancy-Related Acute Kidney Injury (PRAKI); A Study of the Epidemiological Factors and Possible Solutions

A rare cause of pregnancy-related acute kidney injury-infective endocarditis-associated infection-related glomerulonephritis

Pregnancy-related acute kidney injury (PRAKI) commonly occurs due to septic abortion and accounts for 15–25% of acute kidney injury (AKI). Glomerulonephritis is a rare cause of PRAKI. The index case was a 20-year-old primigravida who presented in the last trimester of pregnancy with infective endocarditis-associated glomerulonephritis, also complicated by splenic infarct, AKI, and intrauterine fetal death. Renal biopsy revealed crescentic glomerulonephritis and she improved on antibiotic and steroid therapy.

1098 Pregnancy related acute kidney injury leads to chronic kidney disease in the postpartum

1098 Pregnancy related acute kidney injury leads to chronic kidney disease in the postpartum

Clinical Presentation and Treatment Outcomes of Pregnancy-Related Acute Kidney Injury among Pregnant Women Admitted at the Benjamin Mkapa Hospital in Tanzania

Clinical Presentation and Treatment Outcomes of Pregnancy-Related Acute Kidney Injury among Pregnant Women Admitted at the Benjamin Mkapa Hospital in Tanzania

Characteristics and Outcomes of Patients With Pregnancy-Related End-Stage Kidney Disease

ImportanceThe incidence of pregnancy-related acute kidney injury is increasing and is associated with significant maternal morbidity including progression to end-stage kidney disease (ESKD). Little is known about characteristics and long-term outcomes of patients who develop pregnancy-related ESKD.ObjectivesTo examine the characteristics and clinical outcomes of patients with pregnancy-related ESKD and to investigate associations between pre-ESKD nephrology care and outcomes.Design, Setting, and ParticipantsThis was a cohort study of 183 640 reproductive-aged women with incident ESKD between January 1, 2000, and November 20, 2020, from the US Renal Data System and maternal data from births captured in the US Centers for Disease Control and Prevention publicly available natality data. Data were analyzed from December 2022 to June 2023.ExposurePregnancy-related primary cause of ESKD, per International Classification of Diseases, Ninth Revision (ICD-9) and ICD-10 codes reported at ESKD onset by the primary nephrologist on Centers for Medicare and Medicaid Services form 2728.Main Outcomes MeasuresMultivariable Cox proportional hazards and competing risk models were constructed to examine time to (1) mortality, (2) access to kidney transplant (joining the waiting list or receiving a live donor transplant), and (3) receipt of transplant after joining the waitlist.ResultsA total of 341 patients with a pregnancy-related primary cause of ESKD were identified (mean [SD] age 30.2 [7.3]). Compared with the general US birthing population, Black patients were overrepresented among those with pregnancy-related ESKD (109 patients [31.9%] vs 585 268 patients [16.2%]). In adjusted analyses, patients with pregnancy-related ESKD had similar or lower hazards of mortality compared with those with glomerulonephritis or cystic kidney disease (adjusted hazard ratio [aHR], 0.96; 95% CI, 0.76-1.19), diabetes or hypertension (aHR, 0.49; 95% CI, 0.39-0.61), or other or unknown primary causes of ESKD (aHR, 0.60; 95% CI, 0.48-0.75). Despite this, patients with pregnancy-related ESKD had significantly lower access to kidney transplant compared with those with other causes of ESKD, including (1) glomerulonephritis or cystic kidney disease (adjusted subhazard ratio [aSHR], 0.51; 95% CI, 0.43-0.66), (2) diabetes or hypertension (aSHR, 0.81; 95% CI, 0.67-0.98), and (3) other or unkown cause (aSHR, 0.82; 95% CI, 0.67-0.99). Those with pregnancy-related ESKD were less likely to have nephrology care or have a graft or arteriovenous fistula placed before ESKD onset (nephrology care: adjusted relative risk [aRR], 0.47; 95% CI, 0.40-0.56; graft or arteriovenous fistula placed: aRR, 0.31; 95% CI, 0.17-0.57).Conclusion and RelevanceIn this study, those with pregnancy-related ESKD had reduced access to transplant and nephrology care, which could exacerbate existing disparities in a disproportionately Black population. Increased access to care could improve quality of life and health outcomes among these young adults with high potential for long-term survival.

Risk factors and outcomes associated with pregnancy-related acute kidney injury in a high-risk cohort of women in Nigeria.

Despite a decline in developed countries, pregnancy-related acute kidney injury (PRAKI) remains a significant contributor to maternal mortality and adverse fetal outcomes in resource-constrained settings. Little is known about the impact of pregnancy-related acute kidney injury in Nigeria. Therefore, this study aimed to assess the incidence and maternal-fetal outcomes associated with pregnancy-related acute kidney injury among a cohort of high-risk women in Nigeria. This prospective multicenter study included women at high risk of acute kidney injury, who were more than 20weeks pregnant or within 6 weeks postpartum and admitted to the Obstetrics and Gynecology units of two large public hospitalsbetween September 1, 2019, and July 31, 2022. Acute kidney injury was defined and classified using the Kidney Disease Improving Global Outcomes (KDIGO) criteria. A total of 433 women, with mean age (± standard deviation) of 28 ± 6years, were included in the evaluation. Pregnancy-related acute kidney injury occurred in 113 women (26.1%; 95% confidence interval [CI]: 21.1%-30.2%). The leading cause was preeclampsia (n = 57; 50.1%);19 women died (4.4%), with 17 deaths (15%) occurring in the PRAKI group. Increasing severity of pregnancy-related acute kidney injury was independently associated with maternal mortality: adjusted odds ratio (aOR) for KDIGO stage 2 = 4.40; 95% CI 0.66-29.34, p = 0.13, and KDIGO stage 3 aOR = 6.12; 95% CI 1.09-34.34, p = 0.04. The overall perinatal mortality was 15% (n = 65), with 28 deaths (24.8%) occurring in the PRAKI group. Pregnancy-related acute kidney injury was also associated with an increased risk of perinatal mortality, aOR = 2.23; 95 CI 1.17-4.23, p = 0.02. The incidence of pregnancy-related acute kidney injury was high, and significantly associated with maternal and perinatal mortality. The leading causes were hypertensive disorders of pregnancy.

Risk factors and fetomaternal outcome in pregnancy-related acute kidney injury.

Pregnancy-related acute kidney injury (PRAKI) is acute kidney injury (AKI) occurring during pregnancy, labor, and postpartum period. AKI is defined as suddenly impaired kidney function with the retention of nitrogenous and other waste products. In high population country like India, not all deliveries are done tertiary care. Even not all are registered one if delivery is conducted at a hospital setup. The majority of patients are being managed by available obstetrician at local places. Early diagnosis and timely management of complications related to pregnancy are very important to avoid PRAKI. We aim to study maternal risk factors and fetomaternal outcome in PRAKI. A prospective study is conducted between 2021 and 2022 in the Department of Obstetrics and Gynaecology, VMMC, and Safdarjung Hospital, New Delhi. For antenatal and delivered women up to 6 weeks, 50 patients were recruited according to KDIGO (Kidney Disease International Global Outcomes) criteria. Patients were followed with CBC, serum electrolytes, serial KFT, urine input/output monitoring, and USG-KUB. Dialysis was done if indicated. Complete renal recovery was considered if S.Cr ≤1.0 mg/dl within 6 weeks of diagnosis of AKI. For statistical significance, a P value of less than 0.05 was considered. The majority of patients were unbooked, 21-25 years of age, and belonged to lower socioeconomic status (54%). Risk factors were: preeclampsia (28%), puerperal sepsis (24%), PPH (20%), abruption (14%), pyelonephritis (4%), acute gastroenteritis (4%), gestational hypertension with superimposed preeclampsia (2%), antepartum eclampsia (2%), and thrombotic microangiopathy (2%). Hemodialysis is required in 23 (46%). Complete renal recovery was seen in 40 (80%) and partial renal recovery in 3 (6%). Maternal mortality was 14% and causes were: puerperal sepsis (57%), preeclampsia with severe features with MODS (29%), and antepartum eclampsia with hepatorenal failure (14%). Fetal outcome: 76% live birth, 24% intrauterine death, and 16% early neonatal death. Most common risk factors for PRAKI are preeclampsia followed by puerperal sepsis and PPH where all are preventable causes.

A Retrospective Study on Clinical Outcomes of Pregnancy-Related Acute Kidney Injury Patients at a South Indian Tertiary Care Hospital.

Introduction Acute kidney injury (AKI) significantly contributes to maternal morbidity and mortality in developing nations. In a retrospective study conducted at our tertiary care center in collaboration between the Department of Nephrology and the Department of Obstetrics and Gynecology, we investigated patients admitted with pregnancy-related acute kidney injury (PR-AKI) under the following parameters: incidence, etiology, and maternal outcomes. Methods We evaluated 70 patients admitted with PR-AKI from May 2016 to August 2020. A thorough evaluation was carried out for these patients. The results were analyzed for the association of mortality with the etiology of PR-AKI and the dialysis requirement. Results The mean age among the PR-AKI patients was 24.56 ± 4.2 years. During the study period, there were 33,403 deliveries, consisting of 20,126 vaginal deliveries, and 13,277 were performed via a lower segment cesarean section (LSCS). Seventy patients developed AKI, with an incidence of 2.9 per 1,000 deliveries. The various etiologies included sepsis in 54 cases (74.3%), preeclampsia/eclampsia in 44 (62.85%), LSCS in 27 (38.6%), abruptio placentae in 11 (15.7%), postpartum hemorrhage (PPH) in 11 (15.7%), post-abortion in eight (11.4%), and hemolysis, elevated liver enzymes, and low platelets (HELLP) syndrome in seven (10.46%). The number of patients in various stages of AKI was noted as one in Stage I, 22 in Stage II, and 47 in Stage III. The odds ratio of death in the abruptio placentae was 0.73 (95% CI: 0.08-6.72), whereasamong those with PPH, it was 1.96 (95% CI: 0.34-11.29). The odds ratio of death among patients with LSCS was 0.50 (95% CI: 0.09-2.64). Out of the total, 34 patients (48.6%) required renal replacement therapy (RRT) provided as intermittent hemodialysis. In total, there were eight deaths (11.3%). The odds ratio of death in dialysis patients was 1.89 (95% CI: 0.42-8.54). Perinatal mortality was 32.9%, whereas total perinatal mortality among all patients was 3.5%. The odds ratio of perinatal mortality among those with AKI was 13.29 (95% CI: 8.05-21.96) with p < 0.0001. Conclusion Our study demonstrates that sepsis was the most common cause of PR-AKI, which can be attributed to a lack of antenatal and postnatal care. Other causes included preeclampsia, LSCS, and hemorrhage. The present study also shows that a significant association exists between PR-AKI and perinatal mortality. The requirement of RRT in AKI predicts a less favorable prognosis.

Causes and outcome of pregnancy related acute kidney injury.

To determine frequencies of causes and renal outcomes of pregnancy related acute kidney injury. This descriptive case series study was conducted in Nephrology unit of a tertiary care hospital of Peshawar, from 1st August 2021 to 31st July 2022.A total of 100 patients with acute kidney injury secondary to obstetric conditions were enrolled via non-probability consecutive sampling technique. While patients with pre-existing renal disease, those with renal stones, or having bilateral small kidneys on ultrasound were excluded from the study. Patients were followed till 12 weeks postpartum period. Underlying obstetrical causes and outcome at 12 weeks postnatal period were determined. The mean age of sample of 100 cases was 29.29 ± 6.45. Mean serum creatinine at presentation was 6.5± 3.13. Majority of patient, 89% were multigravidas. Seventy eight percent patients required hemodialysis. Primary postpartum hemorrhage remained the commonest underlying cause of pregnancy related acute kidney injury in this study. The frequency of persistent renal failure in Pr-AKI (pregnancy related acute kidney injury) in this study was 14%. In about 66% of cases complete recovery occurred. All the underlying obstetrical causes, when adjusted for age, gravidity, place and mode of delivery, had no association with persistent renal failure. Primary postpartum hemorrhage is the predominant cause of pregnancy related acute kidney injury. By the end of 12 weeks postpartum, two third patients recover completely from pregnancy related acute renal injury.

Rare Case of Systemic Lupus Erythematosus with Multiorgan Involvement in A Young Pregnant Women – A Case Report

Systemic Lupus erythematosus (SLE) is an autoimmune disease that notoriously varies in presentation, course, andoutcome. Active Nephritis, especially if the neuropsychiatry component is involved, is associated with adverse pregnancy outcomessuch as Gestational hypertension, pre-eclampsia, and renal failure. Our aim is to elaborate on the case report of young pregnantwomen diagnosed with SLE with multiorgan involvement about its course and management and the need for a multidisciplinaryapproach. A 20-year-old primigravida at 33 weeks of gestation with no known co-morbidities previously came with a history offever for 2 days, abdominal pain, and bleeding per vagina. Given placental abruption, the patient underwent an emergency lowersegment cesarean section. The patient developed postpartum hemorrhage (PPH), which was managed medically. On POD#8(postoperative day 8), the patient had generalized tonic-clonic seizures (GTCS) and developed hematuria. On evaluation, itrevealed abnormal renal parameters suggestive of Pregnancy-related Acute Kidney Injury (PRAKI). The patient's condition did notimprove with conservative management. After immunological investigations, a renal biopsy was done, and the diagnosis wasconfirmed as SLE-LN III (Systemic lupus erythematosus-Lupus nephritis) with Neuropsychiatry component involvement. Hence,the patient was started on Hydroxychloroquine based on the National Institute of Health protocol, and her condition improved.Hence given the relatively high number of maternal and neonatal deaths, lupus pregnancies should be followed by a multidisciplinaryteam, including nephrologists, rheumatologists, and obstetricians experienced in high-risk pregnancies, and deliveries should beplanned in tertiary-care settings provided with neonatology intensive care units.

Urinary congophilia in pregnancy: a marker of kidney injury rather than preeclampsia.

The differentiation between preeclampsia and similarly presenting kidney disease in pregnancy is a diagnostic challenge. Although some laboratory tests have been utilized, globally validated tools are yet needed, particularly in resource-limited settings. Congophilic proteins are abundantly detected in the urine of pregnant women who develop preeclampsia that is thought to be a marker of disease process. The present study aimed to assess the diagnostic and predictive utility of urinary congophilia in pregnant women with hypertensive disorders of pregnancy as well as kidney diseases. This cohort study included 157 pregnant women, classified as healthy controls ( n = 38), preeclampsia/eclampsia ( n = 45), gestational hypertension ( n = 9), chronic hypertension ( n = 8), chronic kidney disease (CKD) ( n = 27), and pregnancy-related acute kidney injury (PR-AKI) ( n = 30). Urinary congophilia was assessed by Congo Red Dot Blot assay. Congo red retention (CRR) values were significantly higher in women with preeclampsia/eclampsia ( P ≤ 0.001), chronic hypertension ( P = 0.029), gestational hypertension ( P = 0.017), CKD ( P ≤ 0.001), PR-AKI secondary to preeclampsia ( P ≤ 0.001), and PR-AKI secondary to other causes ( P = 0.001), compared with healthy controls. Women with preeclampsia, CKD, and PR-AKI (non-preeclampsia related) exhibited the highest levels of CRR. CRR positively correlated to proteinuria ( P = 0.006) and serum creatinine ( P = 0.027). CRR did not significantly vary between women who presented antepartum and those presented postpartum after removal of the placenta ( P = 0.707). CRR at a cut-off point of at least 1.272 had 91% specificity and 61.1% sensitivity in predicting renal recovery in PR-AKI patients. CRR had a poor specificity in discriminating preeclampsia from the other clinical presentations. Urinary congophilia could not discriminate preeclampsia from similarly presenting kidney diseases in pregnancy. Further studies are needed to improve differentiation of these conditions.

Indoxyl Sulfate Administration during Pregnancy Contributes to Renal Injury and Increased Blood-Brain Barrier Permeability.

Rates of pregnancy-related acute kidney injury (PR-AKI) have increased in the U.S over the past two decades, but how PR-AKI affects the blood-brain barrier (BBB) is understudied. AKI is associated with increased amounts of uremic toxins, like indoxyl sulfate (I.S), whose chronic administration leads to BBB and cognitive changes. This study's objective was to determine if (1) PR-AKI increases I.S and (2) if administration of I.S during pregnancy elicits renal injury and/or increases BBB permeability. From gestational day (GD) 11 to GD19, Sprague Dawley rats were given either 100 or 200 mg/kg body-weight dose of I.S. PR-AKI was induced on GD18 via 45 min bilateral renal ischemic reperfusion surgery. On GD18, metabolic cage metrics and metabolic waste was collected and on GD19 blood pressure, and BBB permeability (by Evan's Blue infusion) were measured. I.S and creatinine were measured in both urine and circulation, respectively. One-way ANOVA or student t-tests were performed using GraphPad Prism with a p < 0.05 significance. I.S and PR-AKI led to oliguria. I.S administration led to increased BBB permeability compared to normal pregnant and PR-AKI animals. These results suggest that I.S administration during pregnancy leads to increased BBB permeability and evidence of renal injury comparable to PR-AKI animals.

Access to Nephrology Care for Pregnancy-Related Acute Kidney Injury in Low- and Lower-Middle-Income Countries: A Perspective

Pregnancy-related acute kidney injury (AKI) is a major public health problem with substantial maternal and fetal morbidity and mortality. Women with pregnancy-related AKI require immediate access to nephrology care to prevent deleterious kidney and health outcomes. Patients with pregnancy-related AKI in low-income and lower-middle-income countries experience disparities in access to comprehensive nephrology care for many reasons. In this perspective, we highlight the burden of pregnancy-related AKI and explore the challenges among different low-income and lower-middle-income countries. The lack of adequate nephrology workforce and infrastructure for kidney health care represents a fundamental component of the problem. A shortage of nephrologists hampers the care of patients with pregnancy-related AKI leading to poor outcomes. The lack of diagnostic tools and therapeutic options, including kidney replacement therapy, impedes the implementation of effective management strategies. International efforts are warranted to empower women to get the right services and support at the right time. Dedicated preventive and early care programs are urgently needed to decrease the magnitude of pregnancy-related AKI, a complication under-represented in the literature.

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

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

#4767 ACUTE CORTICAL NECROSIS IN PREGNANCY IS STILL AN IMPORTANT CAUSE FOR END-STAGE RENAL DISEASE IN DEVELOPING COUNTRIES

Abstract Background and Aims Renal cortical necrosis (RCN) is a serious complication of acute kidney injury (AKI) and pregnancy is a clinical state closely associated with it with poor renal outcomes. The incidence is much higher in obstetrical AKI compared to other causes of RCN. Despite better medical care facilities available, this continues to be an important cause of morbidity and mortality in developing countries. Method This is a retrospective analysis among all pregnant females presenting with AKI from January 2000 to December 2020 at a tertiary care center in the northern part of India. We looked for the incidence of obstetrical-related RCN in our renal biopsies performed in the last 20 years and to evaluate precipitating factors responsible for RCN. Results RCN constituted 8.1 % of pregnancy-related AKI cases in our institution. The overall incidence has been declining which was 9.09% from 2000 to 2008 to 8.7 % from 2009 to 2014 and 8.1% from 2014-2020. The patient's median age was 28.4 ± 4.6 years. The average time to presentation from the day of delivery was 7.8 ±3.0 days. The mortality was observed in 10.4 % of them with sepsis and multiorgan dysfunction present in all of them. The most common etiology for RCN was found to be septic abortion and puerperal sepsis accounting for - 16.2 % each. Postpartum hemorrhage was a cause in 9.67 % of patients. The most important cause of RCN was postpartum thrombotic microangiopathy which was observed in 49.5% of patients. Kidney biopsy was helpful in diagnosis in 36 patients while computed tomography scan abdomen alone helped in diagnosis in five patients. Patchy cortical necrosis in histology was seen in 36.7% of patients and morbidity in terms of prolonged hospitalization was seen in 23.4 % while dialysis dependency in 63.4% of the study population Conclusion Strategies need to be implemented in reducing the preventable causes for RCN which is not only catastrophic in terms of renal outcomes but also for social and psychological perspectives as well.

Blood Brain Barrier is functional 24 hours following Pregnancy related Acute Kidney Renal Injury

From 1999 to 2011, incidences of pregnancy related acute kidney injury (PR-AKI) increased from 2.4 to 6.3 per every 10,0000 deliveries in the U.S. Acute Kidney Injury (AKI) is associated with increased circulating uremic toxins such as indoxyl sulfate (I.S) and p cresyl sulfate (PCS), cognitive dysfunction and blood brain barrier (BBB) disruption. The purpose of these experiments was to determine if 24 hours following AKI there is evidence of BBB dysfunction in a model of PR-AKI. We hypothesized that AKI would lead to BBB disruption while the treatment of I.S alone does not as our overall hypothesis is that accumulation of uremic toxins following renal injury leads to cognitive dysfunction. Time-pregnant Sprague Dawley rats arrived on gestational day (GD)10 and were randomized into the following groups: normal pregnant (NP; n=5-9), AKI (n=5-8), 100 I.S (n=5-10), and 200 I.S (n=5-9). Beginning on GD11, a subset of rats received either 100 mg/kg body weight (BW) or 200 mg/kg BW dose of I.S via drinking water daily. On GD18, AKI rats received a 45-min bilateral renal ischemic reperfusion surgery. On GD19, blood pressure was taken via CODA tail cuff followed by organ and blood collection. Five animals per group were injected with 4% Evan’s Blue (EB) for 30 mins and flushed with saline. Residual EB was measured in the frontal and posterior cortices, brain stem, and cerebellum. Serum was used to measure I.S and PCS via mass spectrometry. Creatinine was measured in both urine and serum via assay (BioAssay Systems). Data was analyzed via one-way ANOVA followed by multiple comparisons via GraphPad Prism. Statistical significance was determined as p&lt;0.05. AKI animals had a higher kidney weight/BW ratio to NP (p=0.04), 100 I.S (p=0.003), and 200 I.S (p=0.04) while 200 I.S had a larger kidney to BW ratio to NP rats (p=0.02). AKI had smaller spleen weight/BW(p=0.02) ratios compared to NP rats. Pups born to AKI dams were significantly smaller than NP (p=0.001), 100 I.S (p=0.01), and 200 I.S (p &lt;0.0001) dams. 200 I.S (p=0.02) had an increase in placental efficiency (placenta weight/ pup weight) compared to NP rats. Circulating I.S is significantly decreased in 100 I.S rats compared to NP (p=0.04) and AKI (p=0.04). PCS was significantly increased in AKI rats compared to NP (p=0.02), 100 I.S (p=0.03), and 200 I.S (p=0.03). When EB was measured, 200 I.S had significantly more EB in the brain stem region (p=0.01) compared to AKI rats. A one-way ANOVA showed differences in creatinine levels between groups (p=0.04), but multiple comparisons showed no differences between specific groups. PR-AKI led to changes in kidney and spleen weight without differences in BW which could be contributed by the immune response of the injury. We have preliminary data showing increases in circulating I.S 4 months post-partum which suggests increases occur later in postpartum. The brain stem is an interest of study as it has been shown to be implicated in chronic renal failure. Funding to AG (William Townsend Porter Predoctoral Fellowship from American Physiological Society), to KW (Chan Zuckerberg Initiative Science Diversity Leadership Award) This is the full abstract presented at the American Physiology Summit 2023 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.