Community-acquired acute kidney injury in India: data from ISN-acute kidney injury registry

Background

Acute kidney injury (AKI), particularly community-acquired AKI (CA-AKI), is a major health concern globally. The International Society of Nephrology's "0 by 25" initiative to reduce preventable deaths from AKI to zero by 2025 is not achievable in low and middle income countries, such as India, possibly due to a lack of data and measures to tackle this urgent public health issue. In India, CA-AKI predisposes younger patients to hospitalization, morbidity, and mortality. This is the first multicenter, prospective, cohort study investigating CA-AKI and its consequences in India.

Methods

This study included data from patients with CA-AKI (>12 years of age) housed in the Indian Society of Nephrology-AKI registry, involving 9 participating tertiary care centers in India, for the period between November 2016 and October 2019. The etiological spectrum and renal and patient outcomes of CA-AKI at the index visit and at 1-month and 3-month follow-ups were analyzed. The impact of socioeconomic status (SES) on outcomes was also analyzed.

Findings

Data from 3711 patients (mean [±SD] age 44.7 ± 16.5 years; 66.6% male) were analyzed. The most common comorbidities included hypertension (21.1%) and diabetes (19.1%). AKI occurred in medical, surgical, and obstetrical settings in 86.7%, 7.3%, and 6%, respectively. The most common causes of AKI were associated with sepsis (34.7%) and tropical fever (9.8%). Mortality at the index admission was 10.8%. Complete recovery (CR), partial recovery (PR), and dialysis dependency among survivors at the time of discharge were 22.1%, 57.7%, and 9.4%, respectively. Overall, at 3 months of follow-up, mortality rate, CR, PR, and dialysis dependency rates were 11.4%, 72.2%, 7.2%, and 1%, respectively. Multivariate analysis revealed that age >65 years, alcoholism, anuria, hypotension at presentation, thrombocytopenia, vasopressor use, transaminitis, and low SES were associated with mortality at the index admission.

Interpretation

Sepsis and tropical fever were the most common causes of CA-AKI. Presentation of CA-AKI to tertiary care units was associated with high mortality, and a significant number of patients progressed to CKD. Individuals with a low SES had increased risk of mortality and require immediate attention and intervention.

Funding

This study was funded by the Indian Society of Nephrology.

Frailty in Patients With Chronic Kidney Disease Stage Five

Aim To study the prevalence of frailty in patients with chronic kidney disease stage 5 (CKD5) and to assess coexisting factors associated with frailty in chronic kidney disease. Patients and methods We studied the prevalence of frailty in CKD5 patients from November 2021 to November 2022. CKD5 patients over 18 years of age were included. Patients on maintenance hemodialysis and CKD5 patients on pre-dialysis care were included. Patients with active infection and significant morbidity were excluded. We performed a history and clinical examination and recorded laboratory data. We performed frailty assessments using modified Fried's criteria. Frailty was defined based on previously validated Fried's criteria, which included 1. Slowness, 2. Weakness, 3. Unintentional weight loss, 4. Exhaustion, 5. Low physical activity. A patient is considered frail if three or more components are present. We evaluated the prevalence of frailty in pre-dialysis and dialysis care participants and the association of frailty with coexisting factors. Results Of the 139 patients, 84 were on thrice-weekly hemodialysis, and 55 were on pre-dialysis care. We found the prevalence of frailty to be 41%. The prevalence of frailty was similar in patients on pre-dialysis care and hemodialysis. The prevalence of frailty in hemodialysis patients and those in pre-dialysis care was 43% and 40%, respectively. The prevalence of frailty among the elderly (over 55) was 82%. The prevalence of frailty among diabetes patients was 75%. Factors with a statistically significant association with frailty included old age (p < 0.005), native kidney disease (p < 0.005), edema (p < 0.001), intradialytic hypotension (p = 0.002), and various comorbidities like diabetes (p < 0.001), heart failure (p < 0.001), coronary artery disease (p = 0.001), and cerebrovascular accidents (p = 0.016). We observed no significant association with the duration of chronic kidney disease (CKD) (p = 0.458), duration of dialysis (p = 0.838), or body mass index (BMI) (p = 0.267). The most commonly reported frailty components were exhaustion (61.9%), low physical activity (61.2%), and weak handgrip (55.4%). Conclusion Frailty is a marker of increased vulnerability to adverse outcomes. A significant proportion, 41% of CKD5 patients, are frail. Dialysis does not affect the prevalence of frailty in CKD5 patients. Old age, native kidney disease, edema, intradialytic hypotension, and comorbidities like diabetes, heart failure, coronary artery disease, and cerebrovascular accident are significantly associated with frailty in CKD5 patients. CKD patients with those conditions should receive special care to reduce the development of frailty.

Donor-Derived Cell-Free DNA and Active Rejection in Renal Allografts

Background

Renal allograft rejection contributes to significant morbidity and graft loss. In this setting, early detection of rejection is of paramount importance, which currently relies on histopathology. A reliable non-invasive marker to predict rejection would make surveillance and decision-making easier. Donor-derived cell-free DNA (dd-Cf-DNA) has recently been reported as an emerging tool to predict rejection noninvasively. The utility of cell-free DNA in clinical practice has so far not been studied in an Indian setting. As it offers direct clinical application, we have chosen to investigate this biomarker as a tool to predict rejection.

Materials and Methods

A pilot study with convenient sample size was designed, as this is the first of its kind study so far reported from India. Patients being evaluated with a graft biopsy for graft dysfunction were included. Patients with stable graft function, defined as creatinine within 10% of their best creatinine and no proteinuria for the preceding 12 months, were also included. Ten milliliters of whole blood from each of the recipients was collected in DNA isolation tubes. Two milliliters of donor blood was also obtained in ethylenediaminetetraacetic acid (EDTA) tubes. All recipients also provided a buccal swab. Total cell-free DNA was extracted from 2 ml of recipient plasma using circulating DNA isolation kit. Upon identification of the donor-specific DNA marker for each of the patients from the paired donor sample, presence of the cell-free DNA fraction in the recipient's plasma was detected and quantified. Renal biopsy reports and clinical details were also recorded. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were analyzed. Receiver operating characteristic (ROC) curve analysis was also performed.

Results

A total of 31 patients were recruited. Twenty patients underwent graft biopsies for graft dysfunction, of which 12 patients had features of active rejection and eight had nonrejection causes of graft dysfunction. Eleven patients with stable graft were included in the study. In our study, dd-Cf-DNA performed best in predicting antibody-mediated rejection (ABMR) and higher grades of T-cell-mediated rejection (TCMR) (1B). It did not detect TCMR 1A accurately. It serves as a good marker to rule out rejection. It gave a NPV of 100% for TCMR 1B or ABMR, 100% for ABMR alone, and 81% for any rejection. dd-Cf-DNA percentages outperform absolute concentrations in their discriminatory ability.

Conclusion

We have demonstrated the diagnostic accuracy of dd-Cf-DNA in predicting active rejection of the renal allograft. It performs well in ABMR and higher grades of TCMR. This is the first of its kind study reported from India, to the best of our knowledge. This tool serves as a good rule out test for ABMR and higher grades of TCMR. It performs poorly in TCMR 1A.

Uremic Sarcopenia

"Uremic sarcopenia" refers to a progressive decrease in muscle mass, strength, and function despite normal skeletal muscle physiology in patients with chronic kidney disease (CKD). Sarcopenia involves multiple risk factors, comprising immunological changes, hormonal, metabolic acidosis, reduced protein intake, and physical inactivity. All these risk factors, along with complex pathophysiological mechanisms including ubiquitin, insulin/IGF-1, myostatin, and indoxyl sulfate, activate downstream pathways that ultimately increase muscle degradation while reducing muscle regeneration. Uremic sarcopenia not only affects the quality of life but also increases the risk of morbidity and mortality in patients with CKD. Of all the treatment modalities, aerobic and resistance exercise have shown prevention and reduced rate of muscle degeneration. A variety of pharmacological agents have been tried to target different steps in the known pathogenetic pathways, including the use of androgens and anabolic steroids, correction of vitamin D deficiency, use of growth hormone supplementation, and suppression of the ubiquitin pathway. Though some of these techniques have had beneficial results in animal experiments, human trials are still sparse. This review article relates to recent publications that describe the abnormalities in skeletal muscle that primarily leads to muscle wasting and its consequences in patients with CKD.

Outcomes of symptomatic coronavirus disease 19 in maintenance hemodialysis patient in India

BACKGROUND

Maintenance hemodialysis (MHD) patients face disadvantages with higher risk of acquiring SARS-CoV-2 infection, atypical manifestations, and associated multiple comorbidities. We describe patients' outcomes with symptomatic COVID-19 on MHD in a large cohort of patients from India.

METHODS

Data were collected prospectively from hemodialysis units in 11 public and private hospitals between March 15, 2020, and July 31, 2020. The survival determinants were analyzed using stepwise backward elimination cox-regression analysis.

RESULTS

Of the 263 total patients (mean age 51.76 ± 13.63 years and males 173) on MHD with symptomatic COVID-19, 35 (13.3%) died. Those who died were older (p = 0.01), had higher frequency of diabetic kidney disease (p = 0.001), comorbidities (p = 0.04), and severe COVID-19 (p = 0.001). Mortality was higher among patients on twice-weekly MHD than thrice-weekly (p = 0.001) and dialysis through central venous catheter (CVC) as compared to arteriovenous fistula (p = 0.001). On multivariate analysis, CVC use (HR 2.53, 95% CI 1.26-5.07, p = 0.009), disease severity (HR = 3.54, 95% CI 1.52-8.26, p = 0.003), and noninvasive ventilatory support (HR 0.59, 95% CI 0.25-0.99, p = 0.049) had significant effect on mortality.

CONCLUSION

The adjusted mortality risk of COVID-19 in MHD patients is high in patients associated with severe COVID-19 and patients having CVC as vascular access.

A multicenter study of malnutrition status in chronic kidney disease stages I-V-D from different socioeconomic groups

There is a paucity of data on malnutrition in different socioeconomic status in chronic kidney disease (CKD) patients. Hence, this cross-sectional study was undertaken in CKD-ND and CKD-D. The aim of the study was to assess the prevalence of malnutrition in the various stages of CKD among the various socioeconomic groups, namely the low-income groups and the upper-middle-income groups. This is a cross-sectional study conducted among 394 patients. The patient data were obtained from three institutions: Institution 1, Institution 2, and Institution 3. Patients were predominantly from the South Indian population and were between the age groups of 18 and 80 years. Measurements: malnutrition was assessed using anthropometry, body composition monitor, biochemical parameters, and dietary recall. Subjective Global Assessment Scale for nondialyzed patients and Malnutrition-Inflammation Score for dialyzed patients were also collected . As per the CKD stages, we found the percentage of malnutrition to be 7% in Stage III, 14% in Stage IV, 18% in Stage V, and 68% in Stage V-D in the upper-middle-income group, whereas it was 10% in Stage III, 26% in Stage IV, 40% in Stage V, and 93% in Stage V-D in the low-income group. The severity of malnutrition was stratified according to the stages of CKD, and it was found to be higher in progressive stages of CKD among the low-income groups as compared to the high-income groups.

Recurrent Seizures in an Adolescent Female-A Daunting Puzzle

Acute porphyrias are metabolic disorders resulting from deficiency of a specific enzyme involved in heme biosynthetic pathway. These deficiencies also affect normal renal physiology, as kidneys are also involved in heme synthesis. Sometimes, this could even lead to end stage renal disease. Acute Intermittent Porphyria, an autosomal dominant disorder arising from half-normal activity of hydroxymethylbilane synthase, is characterized by occurrence of vague neurovisceral attacks (abdominal pain, nausea, vomiting, constipation and neuropsychiatric symptoms), with urinary excretion of porphyrin precursors, such as 5-Amino-levulinic acid (ALA) and Porphobilinogen (PBG). Acute attacks are triggered by dehydration, diarrhea, steroids, low calorie diets. Treatment includes avoidance of precipitating factors, adequate hydration, high carbohydrate diet and heme replacement. Here, we present an adolescent female who had presented with recurrent abdominal pain, dyselectrolyemia with associated seizures, was diagnosed with Acute Intermittent Porphyria and recovered well with symptomatic management.

The Adverse Effect of COVID Pandemic on the Care of Patients With Kidney Diseases in India

INTRODUCTION

The coronavirus disease 2019 (COVID-19) pandemic has affected the care of patients with noncommunicable diseases, including those suffering from kidney-related ailments. Many parts of the world, including India, adopted lockdown to curb community transmission of disease. The lockdown affected transportation, access to health care facilities, and availability of medicines and consumables as well as outpatient and inpatient services. We aimed to analyze the effect of lockdown imposed due to the COVID-19 pandemic on the care of patients with kidney diseases in India.

METHODS

We surveyed 19 major hospitals (8 in the public and 11 in the private sector) to determine the effect of lockdown on the care of patients with kidney disease, including those on dialysis after the first 3 weeks of lockdown.

RESULTS

The total number of dialysis patients in these centers came down from 2517 to 2404. Approximately 710 (28.2%) patients missed 1 or more dialysis sessions, 69 (2.74%) required emergency dialysis sessions, 104 (4.13%) stopped reporting for dialysis, and 9 (0.36%) were confirmed to have died. Outpatient attendance in the surveyed hospital came down by 92.3%, and inpatient service reduced by 61%. Tele-consultation was started but was accessed by only a small number of patients.

CONCLUSION

Lack of preparedness before lockdown resulted in an interruption in health care services and posed an immediate adverse effect on the outcome of dialysis patients and patients with kidney disease in India. The long-term impact on the health of patients with less severe forms of kidney disease remains unknown.

Challenges in management of disseminated melioidosis with endocarditis in a patient with chronic kidney disease

Melioidosis is a tropical infection that is increasingly being reported from South India. It is frequently observed in patients with diabetes mellitus, chronic ethanol consumption and chronic kidney disease (CKD). It presents commonly with pneumonia, deep seated abscesses or osteoarticular infections. Cardiac complications are very rare with endocarditis being reported in very few patients. We report the first case of endocarditis in melioidosis in India. Although infections are common in patients with CKD, melioidosis at the time of diagnosis of CKD has never been reported in the past. Our patient had multiple liver abscesses and endocarditis, and responded well to a 6 week course of ceftazidime and doxycycline, with the latter being continued for 20 weeks.

Lupus nephritis in a patient with retroviral infection

A 38-year-old woman, diagnosed as Person Living with Human Immunodeficiency Virus (HIV) on Highly Active Antiretroviral Therapy (HAART) for three years, presented with features of fever, rashes, joint pain, dyspnea and pedal edema. On evaluation, a diagnosis of Systemic Lupus Erythematosus with Lupus Nephritis (LN) triggered by HIV infection was made based on clinical and serological evidence. She was continued on HAART, and immuno-suppressive therapy was co-administered resulting in the resolution of her symptoms. Lupus-like histopathological findings have been reported in patients with HIV-related kidney diseases. This case report is to highlight the co-existence of LN in a patient with HIV infection.

Survival of the Patients Diagnosed With Cervical Cancer and Associated Prognostic Factors in the Western Province of Sri Lanka

Background: Cervical cancer is the second commonest cancer among Sri Lankan females with an age-standardized incidence rate of 8.6 per 100,000 in 2008. Aim: Present study assessed the five-year survival of cervical cancer patients diagnosed in 2008 in the western province of Sri Lanka and the associated prognostic factors. Methods: A descriptive cross sectional study was conducted to assess five-year survival among cervical cancer patients of the western province, diagnosed in 2008, from hospital based cancer registry. Ethical clearance was from Ethical Review Committee of Faculty of Medicine, University of Colombo. Study sample consisted of 177 patients who were eligible. Two pretested data records sheets were used. Patient contact details, incident date, clinical stage, histology treatment details, last contact date and survival status at the last contact date were abstracted from the hospital records. Data abstraction from the hospital records were conducted by medical officers. Patients were followed-up at the field by the public health nursing sisters to assess survival-status and associated prognostic factors in 2014. Statistical analysis was conducted using Stata-12. Observed survival rates were calculated using Kaplan-Meier product-limit method. Survival time was limited only for the five years from the incidence date. Survival at 1, 3 and 5 years were calculated. Log-rank test was used in univariate analysis to identify. Potentially important prognostic variables were identified using log-rank test in univariate analysis. Cox-proportional hazards model was used in multivariate analysis using covariates found to be with probability of 0.2 or below in log-rank test. Results: Mean age of the total of 177 eligible patients was 56.3 years (SD=12.4). Majority 79 (44.6%) were from Colombo district. Sixty one (34.5%) and thirty seven (20.9%) were from Gampaha and Kalutata districts respectively. Seventy (56.0%) were in stage IIIA and B. Most 42 (31.8%) had radiotherapy as first treatment while 24 (18.2%) had chemo-radiation, 17 (12.9%) had chemotherapy and 17 (12.9%) had surgery. Thirty-four (24.2%) had other options as first line. Forty-one (23.1%) had experienced the death within the five-year period from the incidence-date. One, three and five year survivals were 86.0%, 70.0% and 62.5% respectively. District, clinical stage, undergone surgery were statistically significant in univariate analysis ( P < 0.05). Only clinical stage was found to be significant in multiple cox- regression( P < 0.05). Women in stage III & IV were 3.5 times more likely to die compared with those in stage I and II at diagnosis. Conclusion: Cervical cancer patients had fairly good five-year survival (62.5%). Late clinical stage being poor prognostic factor reflects the need of strengthening prevention, screening and palliative care.

Lupus podocytopathy: An important differential diagnosis of nephrotic syndrome in systemic lupus erythematosus

Some patients with systemic lupus erythematosus (SLE) present with sudden onset of nephrotic syndrome and biopsy findings may be of minimal change disease or focal segmental glomerulosclerosis with diffuse foot process effacement on electron microscopy but without significant immune deposits. This entity is termed lupus podocytopathy. Clinicians and renal pathologists need to be aware of this condition. Though steroid sensitive, it needs follow-up to recognize flare and class change, thereby optimizing therapy.

Chronic kidney disease hotspots in developing countries in South Asia

In many developing countries in the South Asian region, screening for chronic diseases in the community has shown a widely varying prevalence. However, certain geographical regions have shown a high prevalence of chronic kidney disease (CKD) of unknown etiology. This predominantly affects the young and middle-aged population with a lower socioeconomic status. Here, we describe the hotspots of CKD of undiagnosed etiology in South Asian countries including the North, Central and Eastern provinces of Sri Lanka and the coastal region of the state of Andhra Pradesh in India. Screening of these populations has revealed cases of CKD in various stages. Race has also been shown to be a factor, with a much lower prevalence of CKD in whites compared to Asians, which could be related to the known influence of ethnicity on CKD development as well as environmental factors. The difference between developed and developing nations is most stark in the realm of healthcare, which translates into CKD hotspots in many regions of South Asian countries. Additionally, the burden of CKD stage G5 remains unknown due to the lack of registry reports, poor access to healthcare and lack of an organized chronic disease management program. The population receiving various forms of renal replacement therapy has dramatically increased in the last decade due to better access to point of care, despite the disproportionate increase in nephrology manpower. In this article we will discuss the nephrology care provided in various countries in South Asia, including India, Bangladesh, Pakistan, Nepal, Bhutan, Sri Lanka and Afghanistan.

Celebrating 10 Years of Undergraduate Medical Education: A Student-Centered Evaluation of the Princess Margaret Cancer Centre--Determinants of Community Health Year 2 Program

Between 2000 and 2011, over 170 second-year medical students participated in a Determinants of Community Health (DOCH 2) project at Princess Margaret Hospital (PMH). Students undertook community-based research projects at the hospital or with PMH community partners involving activities such as producing a literature review, writing a research proposal, obtaining ethics approval, carrying out data collection and analysis, presenting their data to classmates and supervisors, and production of a final report. An electronic survey consisting of both quantitative and qualitative questions was developed to evaluate the PMH-DOCH 2 program and was distributed to 144 past students with known email addresses. Fifty-eight students responded, a response rate of 40.3%. Data analysis indicates that an increase in oncology knowledge, awareness of the impact of determinants of health on patients, and knowledge of research procedures increased participants' satisfaction and ability to conduct research following DOCH 2. Furthermore, the PMH-DOCH 2 program enhanced the development of CanMEDS competencies through career exploration and patient interaction as well as through shadowing physicians and other allied health professionals. In addition, some students felt their PMH-DOCH 2 projects played a beneficial role during their residency matching process. The PMH-DOCH 2 research program appeared to provide a positive experience for most participants and opportunities for medical students' professional growth and development outside the confines of traditional lecture-based courses.

Distal renal tubular acidosis and amelogenesis imperfecta: A rare association

Renal tubular acidosis (RTA) is characterized by a normal anion gap with hyperchloremic metabolic acidosis. Primary distal RTA (type I) is the most common RTA in children. Childhood presentation of distal RTA includes vomiting, failure to thrive, metabolic acidosis, and hypokalemia. Amelogenesis imperfecta (AI) represents a condition where the dental enamel and oral tissues are affected in an equal manner resulting in the hypoplastic or hypopigmented teeth. We report a 10-year-old girl, previously asymptomatic presented with the hypokalemic paralysis and on work-up found out to have type I RTA. The discoloration of teeth and enamel was diagnosed as AI.