Glomerular Filtration Rate Values Research Articles

Retrospective assessment of the association between co-morbid disease burden and biochemical parameters in hospitalized hypertensive COVID-19 patients

Background/Aim: Hypertension (HT) was examined as a risk factor affecting the progression of the 2019 novel coronavirus disease (COVID-19). In COVID-19 patients, it can be found in many co-morbid diseases, along with hypertension. It is not clear whether the co-morbid burden of the disease affects the prognosis in hypertensive COVID-19 patients and which biochemical parameters may be indicative of this. Therefore, this study was designed to determine the effect of co-morbid disease burden on biochemical parameters in hospitalized hypertensive COVID-19 patients.
 Methods: After receiving approval from the University Ethics Committee, demographic, clinical, radiological, and laboratory data of 250 hospitalized hypertensive COVID-19 patients between May 2020 and Sept 2020 were screened. Patients with missing records and unclear history of hypertension drug use were excluded from the study. A total of 215 patients were included in the study. Patients were divided into four groups according to the co-morbidity status: (1) HT alone (Group HT0), (2) HT+ Diabetes Mellitus (DM) (Group HTDM1), (3) HT+one co-morbidity exclude DM (Group HT2), and (4) HT+at least two co-morbidities (Group HT3).
 Results: We analyzed the data of 105 female and 110 male patients. Of the 215 patients whose data were evaluated in this study, 15 patients died. Two hundred people were discharged with recovery. The mortality rate was 7%. Of the hypertension patients, 34.9% had DM, 32.6% had coronary artery disease (CAD), 30.2% had chronic obstructive pulmonary disease (COPD), 16.3% had heart failure (HF), 23.3% had chronic kidney failure (CKD), and 9.3% had cerebrovascular disease (CVD). Twenty-five percent were smokers. Urea, creatinine, direct bilirubin (DBil), and Troponin-I values were significantly higher in the Group HT3 compared to the Group HT0, Group HTDM1, and Group HT2 (P < 0.001, P < 0.001, P < 0.001, P = 0.002 respectively). Glomerular filtration rate (GFR) and albümin levels were significantly lower in Group HT3 than in Group HT0, Group HTDM1, and Group HT2 (P < 0.001 and P < 0.001, respectively). The logistic regression model was statistically significant (χ2(7) = 69.088 and P < 0.001); advanced age, decrease in GFR and plateletcrit (PCT) levels, and increase in D-dimer and DBil levels were observed as predictive parameters of mortality in all hospitalized COVID-19 HT patients.
 Conclusion: We determined that SARS-CoV-2 pneumonia patients with HT plus at least two co-morbidities were more serious than other patient groups in terms of organ damage and biochemical variables. In our study, we observed an increase in urea, creatinine, D-dimer, Dbil, and Troponin-I values and a decrease in GFR and albumin values as the co-morbidity burden increased in hypertensive COVID-19 patients. However, a decrease in GFR and hemogram PCT levels and an increase in D-dimer and DBil levels could be risk factors for mortality.

Risk factors for childhood chronic kidney disease: a population-based study.

The population-based prevalence and risk factors of childhood chronic kidney disease (CKD) are not well-defined. We ascertained childhood CKD epidemiology and perinatal risk factors, based on a large computerized medical record database that covers most of southern Israel's population. Pre- and post-natal records of 79,374 eligible children (with at least one serum creatinine test) born during 2001-2015 were analyzed. "Ever-CKD" was defined as ≥ 2 estimated glomerular filtration rate (eGFR) values < 60ml/min/1.73 m2 beyond age 2years, more than 3months apart. The last CKD status was determined on March 2019. Of 82 (0.1%) patients with ever-CKD, 35 (42.7%) had their first abnormal eGFR identified already at age 2years. In multiple logistic regression analysis, congenital anomalies of kidney and urinary tract (CAKUT)-related diagnoses, glomerulopathy, maternal oligohydramnios, small for gestational age, prematurity (under 34weeks), post-term delivery, and small for gestational age at birth were significant risk factors for ever-CKD (odds ratio (95% confidence interval): 44.34(26.43-74.39), 64.60(32.42-128.70), 5.54(3.01-10.19), 2.02(1.25-3.28), 4.45(2.13-9.28), 2.96(1.28-6.86 and 2.02(1.25-3.28), respectively). Seventy children with ever-CKD (85.4%) had a depressed eGFR (< 90ml/min/1.73 m2) on the last assessment (current-CKD), yielding a prevalence of 882/million. CKD is more prevalent among children in southern Israel than previously reported, even after excluding those with aborted-CKD. Prenatal conditions increase the risk to develop CKD in childhood. Graphical abstract A higher resolution version of the Graphical abstract is available as Supplementary information.

Comparison of the 2013 and 2019 Nationwide Surveys on the Management of Chronic Kidney Disease by General Practitioners in Japan.

In 2019, the Japan Physicians Association conducted a second nationwide survey on the management of chronic kidney disease (CKD) among the Japanese general practitioners (GPs). We aimed to clarify the changes in the state of CKD medical care by GPs since the 2013 survey. The 2013 and 2019 surveys included 2214 and 601 GPs, respectively, who voluntarily participated. The two surveys were compared, using propensity score matching to balance the background of the responded GPs. For the medical care of CKD, the frequency of urine or blood examination, use of estimated glomerular filtration rate (eGFR) value for CKD management, and continuous use of renin-angiotensin system inhibitors for their reno-protective effects were significantly higher in 2019 than in 2013 (all: p < 0.001). The medical cooperation in CKD management, the utilization of the clinical path for CKD management and the measurement of the eGFR during the medical health checkup were significantly increased in 2019, compared to those in 2013. More GPs felt dissatisfied with the components of CKD treatment by nephrologists (p < 0.001). The two surveys confirmed improvements in the level of medical care for CKD and a strengthening in cooperation. However, the dissatisfaction with the consultation with nephrologists did not necessarily improve.

A Comparison of the Renal Function between GFR from Tc-99m DTPA Renography and Serum Creatinine, Serum BUN, eGFR by CKD-EPI Equation, and 24-Hour Urine Creatinine Clearance in Thai Living Related Kidney Donors

Background: There are many methods used to estimate renal function in routine clinical practice. Good correlation between glomerular filtration rate (GFR) by Tc-99m DTPA renal scan and inulin clearance is the gold standard method of determining GFR. Objective: The aim of the present study was to evaluate renal function by GFR by Tc-99m DTPA renography and compare it between serum creatinine (Cr), serum blood urea nitrogen (BUN), estimated GFR (eGFR) by Chronic Kidney Disease Epidemiology Collaboration equation (CKDEPI equation), and 24-hour urine creatinine clearance in Thai living related kidney donors. The secondary aim was to investigate whether age or body mass index (BMI) would have a significant effect to the evaluation of GFR from Tc-99m DTPA renography. Materials and Methods: The present study was a retrospective study that included potential living kidney donors who underwent Tc-99m DTPA renal scan and renogram at Siriraj Hospital (Bangkok, Thailand) to evaluate renal function between January 2011 and January 2018. All included patients had complete GFR data from Tc-99m DTPA renography, serum Cr, serum BUN, eGFR by CKD-EPI equation, and 24-hour urine creatinine clearance. Age, gender, and BMI data were also collected. Results: One hundred twenty cases were included. There were 72 females and 48 males, and the mean age was 36.72±10.22 years with a range of 19 to 58 years. Significant correlation was observed between GFR from Tc-99m DTPA renography and serum Cr, serum BUN, eGFR by CKD-EPI equation, and 24-hour urine creatinine clearance. In contrast, gender and BMI revealed no significance with GFR from Tc-99m DTPA renography. Significant negative correlation was found between GFR from Tc-99m DTPA renography and age. Conclusion: The results of the present study revealed that serum Cr, serum BUN, eGFR by CKD-EPI equation, and 24-hour urine creatinine clearance were reliable methods for evaluating GFR. Older age significantly correlated with reduction of the GFR value from Tc-99m DTPA renography. Keywords: GFR; Renal function; Glomerular filtration rate; Tc-99m DTPA renography; Serum creatinine; BUN; CKD-EPI equation; Urine 24 hours creatinine clearance

Outcomes Among Hospitalized Patients With COVID-19 and Acute Kidney Injury Requiring Renal Replacement Therapy.

IntroductionAcute kidney injury (AKI) occurs in up to 10%-30% of coronavirus disease 2019 (COVID-19) patients. AKI patients who require renal replacement therapy (RRT) often have concurrent respiratory failure and represent a high-mortality-risk population. The authors sought to describe outcomes in hospitalized COVID-19 patients with AKI requiring RRT and determine factors associated with poor outcomes. MethodsA retrospective cohort study of hospitalized COVID-19 patients with AKI requiring RRT during the period from March 14, 2020, to September 30, 2020, was performed at Kaiser Permanente Southern California. RRT was defined as conventional hemodialysis and/or continuous renal replacement therapy. The primary outcome was hospitalization mortality, and secondary outcomes were mechanical ventilation, vasopressor support, and dialysis dependence among discharged patients. Hospitalization mortality risk ratios were estimated up to 30 days from RRT initiation. ResultsA total of 167 hospitalized COVID-19 patients were identified with AKI requiring RRT. The study population had a mean age of 60.7 years and included 71.3% male patients and 60.5% Hispanic patients. Overall, 114 (68.3%) patients died during their hospitalization. Among patients with baseline estimated glomerular filtration rate (eGFR) values of ≥ 60, 30-59, and < 30 mL/min, the mortality rates were 76.8%, 78.1%, and 50.0%, respectively. Among the 53 patients who survived to hospital discharge, 29 (54.7%) continued to require RRT. Compared to patients with eGFR < 30 mL/min, the adjusted 30-day hospitalization mortality risk ratios (95% CI) were 1.38 (0.90-2.12) and 1.54 (1.06-2.25) for eGFR values of 30-59 and ≥ 60, respectively. ConclusionAmong a diverse cohort of hospitalized COVID-19 patients with AKI requiring RRT, survival to discharge was low. Greater mortality was observed among patients with higher baseline kidney function. Most of the patients discharged alive continued to be dialysis-dependent.

Global warming, renal function and heart failure over 20 years

BackgroundThe impact of increasing temperatures on renal function in heart failure (HF) outpatients has never been specifically analyzed. MethodsWe retrieved creatinine and estimated glomerular filtration rate (eGFR) values of all HF outpatients followed at a HF clinic and temperature data from 2002 to 2021. For each patient and each year we averaged values of creatinine, eGFR and monthly temperatures during summer and the rest of the year. ResultsThe study cohort included 2167 HF patients undergoing 25,865 elective visits, with a median of 14 visits for each patient (interquartile range 7–23). At the first visit, patients (70% men) had an age of 67 ± 13 years, and a left ventricular ejection fraction of 35 ± 14%. Creatinine was 1.25 ± 0.51 mg/dL, and eGFR was 65 ± 25 mL/min/1.73 m2. When pooling together all average values of creatinine and eGFR measured during summer or in the rest of the year, creatinine was significantly higher in summer (difference 0.04, 95% confidence interval [CI] 0.04 to 0.05, p < 0.001), and eGFR was slightly lower (difference − 2.0, 95% CI -2.3 to −1.8, p < 0.001). Temperature rise during summer increased from 2002 to 2021. The absolute (Δ) and percent (Δ%) elevation in temperature during summer displayed independent associations with Δ and Δ% creatinine and eGFR after adjusting for age, sex, plasma creatinine, and HF therapies. ConclusionsThe magnitude of temperature elevation during summer has increased over 20 years. This elevation correlates with the decline in renal function during summer. This might be an example of how global warming is affecting human health.

Şok İndeksi ve GFR’nin Perfore Apandisit Ayırıcı Tanısındaki Klinik Önemi

Aim: The aim of the study is to investigate whether the shock index (SI) and glomerular filtration rate (GFR) have significance in differentiating acute appendicitis from complicated perforated acute appendicitis. Materials-Methods: Patients were searched retrospectively on the hospital database. Age, gender, C-reactive protein (CRP), leukocyte (WBC), total bilirubin (T.BIL), urea, creatinine, pulse (NBZ), and arterial blood pressure (TA) values of the patients were searched retrospectively on the hospital database and a database was created by using these patient variables. GFR and SI were calculated by using these data. The surgical notes about patients were reviewed retrospectively, and they were divided into two groups, namely perforated appendicitis and non-perforated appendicitis. The data were analyzed to investigate whether GFR and SI were effective in predicting perforation. Results: It was observed that NB/TA value had more frequent pathological findings in patients with perforated appendicitis (p&amp;lt;0.001). It was found that age (p=0.001), CRP (p&amp;lt;0.001), WBC (p&amp;lt;0.001), T. BIL (p=0.002), NB (p=0.017), and NB/TA (p&amp;lt;0.001) values of the patients in the perforated appendicitis group were higher than those of the patients in the normal appendicitis group, while GFR (p&amp;lt;0.001) and TA (p&amp;lt;0.001) values were lower (p&amp;lt;0.05). Conclusion: It is thought that SI and GFR may be a prognostic parameter for showing both perforation and the associated increased mortality rate.

Effect of Post-Transplant Cardiac Angiographic Procedures on Post-Transplant Renal Function

Cardiac interventions often are performed before and after renal transplant for coronary artery disease. The aim of this study was to investigate whether post-transplant cardiac coronary procedures affect post-transplant renal function. We retrospectively included renal transplant recipients who underwent renal transplant procedures at Baskent University between April 28, 1997 and January 20, 2020. We analyzed the effect of cardiac catheterization in renal transplant recipients between 6 and 12 months post-transplant with post-transplant renal function assessed by glomerular filtration rate (GFR). We compared the effect of the type of coronary intervention on GFR change in group 1, whereby group 1 was divided into 2 subgroups (coronary artery bypass grafting [CABG] and stenting). Group 1 included patients who underwent cardiac intervention, whereas group 2 included those who had not undergone cardiac intervention. In all, 108 patients underwent coronary angiography; 45 (41.7%) had normal coronaries or minimal coronary artery disease (CAD); 37 (34.3%) underwent stent implantation; 26 (24.1%) underwent CABG. The mean post- transplantation GFR of all patients after cardiac catheterization was 84.26+25.91 (mL/min/1.73 m2). The final, after 12 months mean GFR of all patients was 69.55+27.05. The final GFR was significantly lower than the initial post-renal GFR value in patients who underwent cardiac intervention but not in non-intervened patients. Invasive cardiac revascularization procedures showed a negative effect on post-transplant renal function in renal transplant recipients. All renal transplant recipients who underwent cardiac intervention survived the intervention, and there was no mortality. The reason for this outcome was assumed to be because of the short follow-up period.

Sonographic Measurement of Renal Sinus Fat to Renal Cortical Thickness Ratio Is a Better Predictor of Chronic Kidney Disease Than Cortical Thickness Alone

Objective: The aim was to determine if the renal sinus fat-to-cortical thickness ratio was a better predictor of chronic kidney disease (CKD) than cortical thickness alone. Materials and Methods: A total of 199 patients were included in the study. Renal fat, parenchyma, and cortical thicknesses were evaluated by sonography retrospectively. Same day serum glomerular filtration rate (GFR) values were obtained and correlated. Results: The study patients had an average fat-to-cortical thickness ratio &lt;0.4 and had a 63% probability of developing renal failure. The probability increased almost linearly from 65% to 85% for patients with a ratio between 0.4 and 0.5, and then plateaued at 85% probability for a ratio &gt;0.5. Additionally, the average fat-to-cortical thickness ratio was statistically significant ( P-value = .02) in predicting progression to renal failure, compared to a cortical thickness alone ( P-value = .12 and P-value = .39 for the left and right kidney, respectively). However, when evaluating individual kidneys for the average fat-to-cortical thickness ratio, only the left kidney showed a statistical significance ( P-value = .02 and P-value = .08 on the left and right, respectively). Conclusion: The renal sinus fat-to-cortical thickness ratio has a significant negative correlation to GFR, specifically for the left kidney. The probability of developing renal failure increases with higher ratios. The renal sinus fat-to-cortical thickness ratio may also be better than cortical thickness alone in predicting progression toward CKD and it acts as an internal control for differences in body size.

Clinical significance of low pre-transplant donor specific antibodies (DSA) in living donor kidney recipients with negative complement-dependent cytotoxicity crossmatches (CDCXM), and negative flow cytometry crossmatches (FLXM) – A single-center experience

BackgroundIt is controversial whether all donor-specific antibodies (DSA) detected by the solid-phase single antigen bead (SAB) assay negatively affect kidney transplantation outcomes. The study aimed to evaluate the possible clinical significance of low pre-transplant DSA in living donor kidney recipients. We analyzed a group of patients with HLA-A, B, and -DR DSA reactivities below a virtual crossmatch (VXM) value of 5000 MFI but with all VXM DSA reactivities at HLA-DQ, -DP, and -Cw, which were not typed routinely for donors prior to transplantation. We also investigated the incidence of persistent and de novo DSAs in available posttransplant SAB assays. MethodsFrom the historical cohort of living donor recipients transplanted between 2014 and 2018 at our center (n = 82), 55 patients met the inclusion criteria, namely: these patients were > 18 years old with non-HLA identical sibling donors, who were not desensitized, who had available pre-transplant SAB results, and who had negative both complement-dependent cytotoxicity crossmatch (CDCXM) and flow cytometry crossmatch (FLXM) results. An additional donor HLA typing, performed for all 55 recipients, identified donor additional HLA-DQ, -DP, and -Cw DSA reactivities. These patients were then divided by SAB reactivity into three groups: 1) those with DSA-positive reactivities; 2) those with non-donor-specific anti-HLA reactivities (NDSA); and, 3) those who were anti-HLA-negative. All these recipients were followed for three years and checked for their de novo or persistent DSA. ResultsIn the studied cohort, DSA-positive, NDSA reactive, and anti-HLA negative recipients constituted 33%, 36%, and 31% of 55 patients, respectively. Non-routinely considered pre-transplant HLA-DQ, -DP, and -Cw DSA-positive reactivities were shown in as many as 78% of DSA-positive cases (group 1) with the lowest MFI value of 319 to DP4 and the highest MFI of 5767 to DQ2. Of the pre-transplant HLA-A, B, and -DR DSA reactivities, only -DR52 DSA reactivity reached the highest MFI value of 2191. These detected DSAs did not reduce the mean estimated glomerular filtration rate (eGFR) values and did not increase the incidence of proteinuria in recipients. While the 3-year graft survival was lower in the DSA-positive group (94.4%) with one recipient who lost kidney transplant, the difference was not significantly different (p = 0.7) from the NDSA (100%) and negative (100%) groups. In terms of the incidence of de novo acute antibody-mediated rejection (AMR) at three years after transplantation, no case has been reported in the cohort. This may suggest that low DSA-positive recipients do not experience higher rejection rate. However, DSA-positive recipients had a tendency for a higher frequency of C4d deposits in peritubular capillaries (PTC) and de novo DSA. ConclusionOur 3-year follow-up of patients with low pre-transplant DSA found no association with a deterioration in graft function and worse graft survival. Furthermore, we did not observe an increase in AMR in our patients with low DSA. A larger cohort and a longer follow-up period may be needed to evaluate the tendency of low DSA-positive recipients towards the higher incidence of C4d deposits in PTC and/or de novo DSA.

Sympathetic activation and heart rate thresholds for cardiovascular risk in chronic kidney disease.

The current study was designed at assessing whether the sympathetic cardiovascular drive (SNS) is differently activated in chronic kidney disease (CKD) patients displaying less or more elevated resting heart rate (HR) values. It was also designed at determining at which HR cutoff value the SNS displays a greater activation. In 95 CKD middle-age patients we evaluated muscle sympathetic nerve activity (MSNA, microneurography) and venous plasma norepinephrine (HPLC assay), subdividing the patients in different groups according to their resting clinic and 24-h HR. In CKD progressively greater values of clinic or 24-h HR were associated with a progressive increase in both MSNA and norepinephrine. HR cutoff values indicated by large-scale clinical trials for determining cardiorenal risk, that is more than 80 bpm, were associated with MSNA values significantly greater than the ones detected in patients with lower HR, this being the case also for norepinephrine. Both MSNA and norepinephrine were significantly related to clinic ( r = 0.47, P < 0.0001 and r = 0.26, P < 0.0001, respectively) and 24-h ( r = 0.42, P < 0.0001 and r = 0.27, P < 0.0001, respectively) HR. MSNA, norepinephrine, but not HR, were significantly and inversely related to estimated glomerular filtration rate (eGFR) values ( r = -0.47, r = -0.23, P < 0.0001 and P < 0.02, respectively). In CKD both clinic and 24-h HR values greater than 80 bpm are associated with an enhanced sympathetic activation, which parallelles for magnitude the HR elevations. The sensitivity of HR as sympathetic marker is limited; however, no significant relationship being detected between HR and eGFR or left ventricular mass index.

Renal function and mortality in patients with atrial fibrillation.

The aim of this study is to examine the association of the presence of chronic kidney disease (CKD) and estimated glomerular filtration rate (eGFR) values with mortality in patients with atrial fibrillation. This posthoc analysis of a randomized controlled trial consisted of hospitalized patients with atrial fibrillation who were followed up for a median of 2.7 years after discharge. Kaplan-Meier curves, multivariate Cox-regression and spline curves were utilized to assess the association of CKD, CKD stages 2-5 according to the KDOQI guidelines, and the continuum of eGFR values with the primary outcome of all-cause death, and the secondary outcome of cardiovascular mortality. Out of 1064 hospitalized patients with atrial fibrillation, 465 (43.7%) had comorbid CKD. The presence of CKD was associated with an increased risk for both all-cause and cardiovascular mortality following hospitalization [adjusted hazard ratio (aHR): 1.60; 95% confidence intervals (95% CIs): 1.25-2.05 and aHR: 1.74; 95% CI: 1.30-2.33, respectively]. The aHRs for all-cause mortality in CKD stages 2-5, as compared with CKD stage 1 were 2.18, 2.62, 4.20 and 3.38, respectively (all P < 0.05). In spline curve analyses, eGFR values lower than 50 ml/min/1.73 m2 were independent predictors of higher all-cause and cardiovascular mortality. In recently hospitalized patients with atrial fibrillation, the presence of CKD was independently associated with decreased survival, which was significant across CKD stages 2-5, as compared with CKD stage 1. Values of eGFR lower than 50 ml/min/1.73 m2 were incrementally associated with worse prognosis.

Contrast-Induced Acute Kidney Injury in Patients on SGLT2 Inhibitors Undergoing Percutaneous Coronary Interventions: A Propensity-Matched Analysis.

BackgroundContrast-induced acute kidney injury (CI-AKI) is a common complication of patients undergoing percutaneous coronary intervention (PCI). Data regarding the influence of sodium-glucose cotransporter-2 (SGLT2) inhibitor on the CI-AKI incidence and renal outcomes of patients undergoing PCI are limited. This study aimed to examine the real-world risk of CI-AKI in SGLT2 inhibitor users undergoing PCI.MethodsWe used longitudinal data from the medical records of the First Affiliated Hospital of Xi'an Jiaotong University. We selected SGLT inhibitor users and nonusers [patients with type 2 diabetes (T2D) without SGLT2 inhibitor prescription] undergoing PCI. We determined CI-AKI by the ESUR (European Society of Urogenital Radiology, AKIESUR) and KDIGO definition (Kidney Disease: Improving Global Outcomes, AKIKDIGO). We performed 1:1 nearest-neighbor propensity matching and calculated unadjusted odds ratios (ORs) and adjusted ORs (aORs; accounting for covariates poorly balanced) for AKI in primary and sensitivity analyses. We compared the renal function indicators in users and nonusers at 24, 48, and 72 h post-PCI.ResultsWe identified 242 SGLT2 inhibitor users and 242 nonusers in the cohort. The unadjusted ORs of CI-AKIESUR were 63% lower in users [OR: 0.37 (95% CI: 0.18–0.68); P = 0.01], which was unchanged [aOR: 0.37 (95% CI: 0.19–0.67); P < 0.01] post adjustment. These estimates did not qualitatively change across several sensitivity analyses. There was no significant difference in urea nitrogen, creatinine, and estimated glomerular filtration rate (eGFR) values between the two groups before PCI, and at 24 h, while the creatinine (48 and 72 h post-PCI) and CyC (24 and 48 h post-PCI) were significantly lower than those in the nonuser group (P < 0.05).ConclusionOur findings do not suggest an increased risk of CI-AKI associated with SGLT2 inhibitor use in patients with CAD and T2D undergoing PCI.

Three-dimensional imaging reconstruction of the kidney's anatomy for a tailored minimally invasive partial nephrectomy: A pilot study

ObjectiveThe aim of the study was to evaluate three-dimensional virtual models (3DVMs) usefulness in the intraoperative assistance of minimally-invasive partial nephrectomy in highly complex renal tumors. MethodsAt our institution cT1-2N0M0 all renal masses with Preoperative Aspects and Dimensions Used for an Anatomical classification score ≥10 treated with minimally-invasive partial nephrectomy were considered for the present study. For inclusion a baseline contrast-enhanced computed tomography in order to obtain 3DVMs, the baseline and postoperative serum creatinine as well as estimated glomerular filtration rate values were needed. These patients, in which 3DVMs were used to assist the surgeon in the planning and intraoperative guidance, were then compared with a control group of patients who underwent minimally-invasive partial nephrectomy with the same renal function assessments, but without 3DVMs. Multivariable logistic regression models were used to predict the margin, ischemia, and complication score achievement. ResultsOverall, 79 patients met the inclusion criteria and were compared with 143 complex renal masses without 3DVM assistance. The 3DVM group showed better postoperative outcomes in terms of baseline-weighted differential estimated glomerular filtration rate (−17.7% vs. −22.2%, p=0.03), postoperative complications (16.5% vs. 23.1%, p=0.03), and major complications (Clavien Dindo >III, 2.5% vs. 5.6%, p=0.03). At multivariable logistic regression 3DVM assistance independently predicted higher rates of successful partial nephrectomy (odds ratio: 1.42, p=0.03). Conclusion3DVMs represent a useful tool to plan a tailored surgical approach in case of surgically complex masses. They can be used in different ways, matching the surgeon's needs from the planning phase to the demolitive and reconstructive phase, leading towards maximum safety and efficacy outcomes.

Mesenchymal stem cells therapy in children with end-stage kidney disease

Chronic kidney disease (CKD) is a major health problem worldwide, with increasing incidence and prevalence. While the incidence of CKD in children is relatively low, CKD contributes to major health problems and has many long-term effects.1 Chronic kidney disease is characterized by a gradual decline in kidney function over time. The Kidney Disease Improving Global Outcomes (KDIGO) report defined CKD as an abnormality of renal structure or function with decreased glomerular filtration rate (GFR) that lasts more than three months. Chronic kidney disease is classified into 5 stages based on the GFR value.2 Patients with stage V CKD transition from progressive disease to irreversible, terminal, end-stage kidney disease (ESKD). To date, the standard of ESKD management has been kidney replacement therapy, consisting of hemodialysis (HD), peritoneal dialysis (PD), and/or kidney transplantation. Complexity and cost of kidney care have obvious consequences on the availability of kidney replacement therapy for children, especially in developing countries. Dialysis provides only partial replacement of renal functions, especially clearance and fluid balance, but does not cure the disease. Kidney transplantation is a curative management, but donor availability for pediatric patients remains challenging

The Association between Kidney Function and the Severity of COVID-19 in Children

BACKGROUND: Kidney manifestations are life-threatening conditions, such as end-stage kidney disease, notably when caused by viral infections. The severe acute respiratory syndrome Coronavirus-2 (SARS-CoV-2), is an emerging global health problem, potentially affecting all organs, including the kidney. Most reports on kidney manifestations were focused on the adult and elderly population but limited on children. AIM: This study aims to analyze the association between kidney function and the severity of the disease of pediatric patients suffering from COVID-19. METHODS: From March 2020 to March 2021, an observational analytic study was conducted in Hasan Sadikin General Hospital, Bandung, Indonesia. The demographic data, clinical signs, laboratory results, and notable kidney function were analyzed, and based on its clinical appearance the disease was classified as severe and non-severe. Subsequently, the Mann–Whitney test for nonparametric was used to analyze the collected data. RESULTS: In this study, 40 COVID-19 children were selected as the subjects, and the median estimated glomerular filtration rate (eGFR) value in the severe group was discovered to be lower (88.2 mL/min/1.73 m2) compared to the non-severe (124.4 mL/min/1.73 m2), it was statistically significant (p = 0.041). There was no difference in hemoglobin and leukocyte values between the two groups (p &gt; 0.05). Furthermore, the CRP and NLR results showed no difference between the groups (p &gt; 0.05). CONCLUSION: A severe SARS-CoV-2 infection correlates with kidney function, which was manifested by a lower median eGFR value in the severe compared to the non-severe group.

Kidney dysfunction is a significant risk factor for 30-day postoperative complications following shoulder arthroplasty

BackgroundThe objective of this study was to investigate estimated glomerular filtration rate levels as an independent risk factor for short-term complications within 30 days of shoulder arthroplasty (SA). MethodsThe American College of Surgeons National Surgical Quality Improvement database was queried for all patients who underwent SA between 2015 and 2019. The study population was then divided into 6 cohorts based on estimated glomerular filtration rate values of <15 (stage 5 CKD), 15-30 (stage 4 CKD), 30-60 (stage 3 CKD), 60-90, 90-120 (reference cohort), and 120-155. Multivariate logistic regression was conducted to investigate the association between glomerular function and postoperative complications within 30 days of SA. Major complications included cardiac, renal, and respiratory complications, as well as reoperation, readmission, and mortality. Minor complications included urinary tract infection, pneumonia, and transfusion within 72 hours. ResultsThis study included a total of 19,681 patients. An increasing rate of overall complications was observed as the severity of CKD progressed from stage 3 (9.9%) to stage 4 (21.2%) and to stage 5 (21.3%). A similar pattern was seen for major complications (6.2%, 10.3%, 11.7%), minor complications (5.3%, 13.0%, 13.8%), and postoperative anemia requiring transfusion (3.2%, 10.3%, 10.6%). An adjusted multivariate logistic regression analysis showed that the stage 5 CKD cohort had a greater risk of developing the following complications than the reference cohort: overall complications (odds ratio [OR], 3.6; P = .015), minor complications (OR, 5.8; P = .003), renal complications (OR, 27.2; P = .005), and postoperative anemia requiring transfusion (OR, 12.8; P < .001). The stage 4 CKD cohort was also observed to have a greater risk of developing the following complications than the reference group: overall complications (OR, 2.6; P < .001), minor complications (OR, 2.9; P < .001), postoperative anemia requiring transfusion (OR, 4.5; P < .001), nonhome discharge (OR, 1.6; P = .026), and hospital readmission (OR, 2.2; P = .015). Similarly, the stage 3 CKD cohort had a greater risk of developing the following complications than the reference group: overall complications (OR, 1.3; P = .004), major complications (OR, 1.3; P = .035), minor complications (OR, 1.3; P = .038), postoperative anemia requiring transfusion (OR, 1.5; P = .014), and hospital readmission (OR, 1.3; P = .028). ConclusionThis study identified a significant association between increasing severity of CKD (from stage 3 to 5) and increased overall complication rates within 30 days of SA. Patients with the stage 5 CKD cohort status had much higher odds of developing minor complications, overall complications, and postoperative anemia requiring transfusion than those with earlier stages of CKD (stage 3 and 4).

MO155: The Importance of Measured GFR in Clinical Practice: An Old Knowledge for Nephrologists, a New Challenge for Oncologists and Surgeons

Abstract BACKGROUND AND AIMS In daily clinical practice, an accurate assessment of renal function is of paramount importance in several categories of patients where the adequate medical or surgical treatment depends on the values of glomerular filtration rate (GFR). In particular, both oncological and urological patients require a personalized medical approach able to avoid misleading errors which could dramatically shorten their lifespan. Unfortunately, the most used method to measure GFR in these groups of patients is represented by the estimated glomerular filtration rate (eGFR), which harbours a significant error in comparison to gold standards methods (mGFR). The aim of this study was to determine the extent of the error of eGFR compared to the mGFR in a consecutive prospective cohort of oncological patients affected by urological malignancies. METHOD A total consecutive cohort of 352 patients enrolled in a single tertiary institution between 2018 and 2021 was collected in order to compare the most common eGFR formulas used by physicians (Cockroft-Gault, MDRD, CKD-EPI based on serum creatinine and/or serum cystatin and the new eGFR equation based on creatinine and cystatin without race adjustment) with the most widespread mGFR method (Iohexol Plasma Clearance). The study cohort was composed by 188 oncological patients affected by different types of urological malignancies (cases) before surgical operation and/or medical treatment and 164 non-oncological patients (controls) matched for baseline clinical variables and GFR. The agreement between eGFR and mGFR was evaluated using bias (as median of difference), precision (as interquartile range of difference—IQR) accuracy (as P30) and total deviation index (TDI). The differences between cohorts were evaluated with Fisher's exact test and Chi-squared test for ordinal characteristics and Wilcoxon rank sum test for continuous variables. Data analysis was performed using programming language R and Python. RESULTS Clinical data were as follows: median age 68 (IQR: 20.68), M/F ratio 3.19, median BMI 24.9 (IQR: 0.003, 24.938). A total of 61.2% of patients had hypertension, and 14.3% were diabetics. The median creatinine value in the overall population was 1.48 mg/dL (IQR: 0.45, 1.48); the median cystatin value was 1.26 mg/dL (IQR: 0.42, 1.26). Based on iohexol plasma clearance, 3.13% of patients were classified in CKD stage 1, 23.30% in stage 2, 29.55% in stage 3a, 27.27% in stage 3b, 14.77% in stage 4 and 1.99% in stage 5. The two matched cohorts of oncological and non-oncological patients displayed no statistical differences in terms of clinical variables and agreement parameters (TDI, CCC and P30). Surprisingly, both groups harboured a non-negligible error in each CKD class with a huge discrepancy between the eGFR formulas and the gold standard method (Figures 1 and 2), suggesting the great relevance of mGFR in the clinical decision-making algorithm, both in oncological and in non-oncological patients. CONCLUSION We observed that the error in the classification of CKD stages using eGFR formulas was very common, both in oncological and in nephrological patients, with a poor agreement with mGFR in all CKD classes. Therefore, mGFR remains a crucial tool for a correct clinical decision in all onconephrological patients who require surgery or potential nephrotoxic agents.

MO955: Serum Cystatin C in Renal Transplantation: Beyond GFR Estimation, A Prognosis Marker?

Abstract BACKGROUND AND AIMS In renal transplantation, death with a functioning graft remains one of the main causes of graft loss. In the general population, renal function impairment is strongly associated with cardiovascular and all-cause mortality. Whether this association holds true for kidney transplant recipients (KTR) is unclear. This uncertainty is likely to be due, in part, to the fact that glomerular filtration rate (GFR) estimation based on serum creatinine (SCr) does not always provide an accurate evaluation of the graft function in KTR. As compared to SCr, we have previously shown in a large cohort of KTR that serum cystatin C (SCysC) is a much better marker of GFR. Herein, we sought to study the ability of the 1-year-post-transplant renal function to predict all-cause mortality according to the methods used to assess GFR. METHOD Four hundred and ten consecutive KTR for whom a measurement of GFR by inulin clearance was available at 1 year post-transplant were included. SCr and ScysC were measured with standardized methods. The association of the 1-year inulin clearance value the 1-year MDRD Study equation value and the 1-year CKD-EPI ScysC equation value with all-cause mortality was studied by ROC analysis and Cox model. RESULTS During a median follow-up of 17 years, 131 KTR died. Mean (±SD) inulin clearance at 1-year-post-transplant was 47 (±13) mL/min/1.73 m2. Areas under the ROC curves were similar for inulin and CKD-EPI ScysC equation values (0.62 for both), and were both significantly superior to that of the MDRD equation (0.54, P &amp;lt; 0.01). In Cox analysis, while all types of GFR evaluations were significantly associated to graft loss, only an inulin and a CKD-EPI ScysC equation values below 45 mL/min/1.73 m2 were associated with an excess risk of mortality (HR of 1.55, 1.45 and 1.01 for inulin, CKD-EPI ScysC and MDRD, respectively). CONCLUSION We conclude that ScysC-based GFR estimation might better predict KTR outcome as compared with a traditional SCr-based estimation. The one year-post transplant GFR value given by the CKD-EPI ScysC equation should be further evaluated as a potential surrogate marker for both graft and patient survival.

BK Polyomavirus Infection and Risk Factors in Pediatric Patients Undergoing Kidney Transplant.

BK polyomavirus infection is a critical complication affecting graft survival after kidney transplant. We aimed to determine the frequency, the effect on graft function, and the risk factors of BK polyomavirus infection in pediatric kidney transplant patients. We retrospectively reviewed data of 144 pediatric patients (female/male: 67/77; 0-18 years of age) who received kidney transplants in the past 10 years at our center. Demographic/ laboratory data, kidney failure etiologies, donor types, and immunosuppressive treatments were recorded. Patients were grouped as those with and without BKV infection, with groups compared in terms of transplant age, sex, kidney failure etiology, donor type, immunosuppressive treatments, presence of ureteral stents, acute rejection episodes, accompanying viral infections, glomerular filtration rate, and graft loss rate. Twelve patients (8.3%) had BK polyomavirus infection. All 12 patients had viruria (8.3%), 8 (5.5%) had viremia, and 4 (2.8%) had BK polyomavirus nephropathy. Two patients (1.4%) had graft loss because of BK polyomavirus nephropathy. When patients with and without infection were compared, no significant differences were found in terms of sex, transplant age, donor type, presence of a ureteral stent, acute rejection, graft loss, or immunosuppressive treatment (P > .05). Rates of congenital anomalies of the kidney and urinary tract were 30.3% and 66.6% in those without and with BK polyomavirus infection, respectively (P < .05). The group positive for BK polyomavirus had a significantly higher incidence of cytomegalovirus infection versus the group without infection (P < .05). Glomerular filtration rate values at years 1 and 3 were similar between groups (P > .05). Frequency of BK polyomavirus nephropathy in pediatric patients undergoing kidney transplant in our center was consistent with data from other centers. Graft loss can be prevented by early detection and treatment through close periodic control and adequate evaluation of risk factors.