Interleukin-6 and Outcome of Chronic Hemodialysis Patients with SARS-CoV-2 Pneumonia.

Background and Objectives: Chronic hemodialysis (CHD) patients are at increased risk of SARS-CoV-2 infection and the related complications and mortality of COVID-19 due to the high rate of comorbidities combined with advanced age. This observational study investigated the clinical manifestations of SARS-CoV-2 infection in CHD and the risk factors for patients' death. Materials and Methods: The study included 26 CHD patients with SARS-CoV-2 pneumonia detected by positive RT-PCR on nasopharyngeal swabs and high-resolution computed tomography at hospital admission, aged 71 + 5.9 years, 14 of which (53.8%) were male, 20 (77%) under hemodiafiltration, and 6 (23%) on standard hemodialysis, with a median follow-up of 30 days. Results: Simple logistic regression analysis revealed that the factors associated with a higher risk of death were older age (OR: 1.133; 95%CI: 1.028-1.326, p = 0.0057), IL-6 levels at admission (OR: 1.014; 95%CI: 1.004-1.028, p = 0.0053), and C-reactive protein (OR: 1.424; 95%CI: 1.158-2.044, p < 0.0001). In the multiple logistic regression model, circulating IL-6 values at admission remained the only significant prognosticator of death. The ROC curve indicated the discriminatory cut-off value of 38.20 pg/mL of blood IL-6 for predicting death in chronic hemodialysis patients with SARS-CoV-2 pneumonia (sensitivity: 100%; specificity: 78%; AUC: 0.8750; p = 0.0027). Conclusions: This study identified a threshold of IL-6 levels at hospital admission for death risk in CHD patients with SARS-CoV-2 pneumonia. This might represent a valuable outcome predictor, feasibly better than other clinical, radiological, or laboratory parameters and preceding the IL-6 peak, which is unpredictable.

The Renal Community Photo Initiative: A Program Report in Ontario, Canada.

Purpose of Program: We initiated the Renal Community Photo Initiative to better understand why some hemodialysis users express significant capacities for resilience and hope, demonstrating outward-looking perspectives and enjoying a rich quality of life. Sources of Information: "Photovoice" is a participatory research methodology that encourages individuals to develop positive self-perceptions with photography. Photovoice empowers participants as informants within their communities. Visual arts researchers surveyed existing Photovoice studies to identify gaps in knowledge to be addressed in this study, including challenges related to fostering participant agency and social action. Images and logs were collected and reviewed during organized, participant-led substudy groups. These meetings provided researchers with core study values and direction as to how the images and additional information should be used to raise awareness about living with chronic kidney disease. Methods: To address the complexity of the human condition, the Renal Community Photo Initiative offered participants an array of diverse and accessible image-making techniques. No narrative directives for image-making were provided. This qualitative, interdisciplinary, participant-centric study invited adult chronic hemodialysis patients in 4 dialysis units in London and Stratford, Ontario, to participate. The research team designed a selection of different, accessible photo technologies for participant use. Eligible participants were invited to select photographic technologies and given the additional option to write accompanying logs. Researchers organized substudy meetings for participant-led focus groups to discuss core study values and personal encounters with images and image-making. Participants directed how their generated images should be shared with the public and researchers. Key Findings: A total of 40 participants have been recruited to date, producing more than 1600 images and an archive of handwritten logs. Three participant-led focus groups have established priorities for image sharing and a core set of values for subsequent study phases. A series of public presentations of participant images took place. The research team will pursue further public presentation opportunities and the development of a suitable research database. Limitations: Organizing and categorizing images for access in an interdisciplinary research database remains a challenge. Current health and safety protocols related to COVID-19 require the study to pause recruitment and substudy meetings and reassess immediate outputs for visuals. Implications: A qualitative study of this scope offers a new model for participant agency and collaboration. It requires the onboarding of interdisciplinary researchers to effectively engage with its significant image and log archive. Participants should remain involved in directing future steps for disseminating their images. Following substudy directives, researchers are developing visuals for health care and public settings, and determining opportunities for participants to share their experience in both clinic- and public-based settings.

Objectif du programme: Nous avons lancé la Renal Community Photo Initiative afin de mieux comprendre pourquoi certains utilisateurs de l'hémodialyse font preuve d'importantes capacités de résilience et d'espoir, sont tournés vers le monde extérieur et jouissent d'une riche qualité de vie. Sources: « Photovoice ¼ est une méthodologie de recherche participative qui encourage les individus à développer une perception de soi positive grâce à la photographie. Photovoice permet aux participants de devenir des informateurs au sein de leurs communautés. Les chercheurs en arts visuels ont mené une enquête sur les études existantes de Photovoice afin de révéler les lacunes dans les connaissances qui pourraient être comblées par la présente étude, notamment les défis liés à la promotion de la participation et de l'action sociale des participants. Des images et des registres ont été recueillis et examinés lors de sous-groupes d'étude organisés et dirigés par les participants par les participants. Ces réunions ont permis aux chercheurs de définir les valeurs fondamentales de l'étude et d'indiquer comment utiliser les images et les autres informations pour sensibiliser les gens à la vie avec maladie rénale chronique. Méthodologie: Afin d'aborder la complexité de la condition humaine, la Renal Community Photo Initiative a offert aux participants une gamme diverse et accessible de techniques de création d'images. Aucune directive narrative n'a été fournie pour la création des images. Cette étude qualitative, interdisciplinaire et axée sur les participants a invité des adultes suivant des traitements d'hémodialyse chronique dans quatre unités de dialyse de London et Stratford (Ontario) à participer. L'équipe de recherche a conçu une sélection de technologies photographiques diverses et accessibles à l'usage des participants. Les participants admissibles ont été invités à choisir des technologies photographiques et à tenir un journal s'ils le souhaitaient. Les chercheurs ont organisé des réunions de sous-étude pour des groupes de discussion dirigés par les participants afin de discuter des valeurs fondamentales de l'étude et des expériences personnelles avec les images et la création d'images. Les participants ont établi la façon dont leurs images devraient être partagées avec le public et les chercheurs. Principaux résultats: À ce jour, 40 participants ont été recrutés et plus de 1 600 images ont été produites, de même qu'une archive de journaux manuscrits. Trois groupes de discussion dirigés par les participants ont établi les priorités pour le partage des images ainsi qu'un ensemble de valeurs fondamentales en vue des phases ultérieures de l'étude. Plusieurs présentations publiques des images des participants ont eu lieu. L'équipe de recherche poursuivra les présentations publiques et l'élaboration d'une base de données de recherche. Limites: L'organisation et la catégorisation des images pour y accéder dans une base de données de recherche interdisciplinaire demeurent un défi. Les protocoles actuels de santé et de sécurité liés à la COVID-19 empêchent le recrutement et les réunions de sous-étude pour le moment et imposent de réévaluer les résultats immédiats pour les visuels. Conclusion: Une étude qualitative de cette envergure offre un nouveau modèle pour la participation et collaboration des patients. Elle exige l'intégration de chercheurs interdisciplinaires afin d'exploiter efficacement ses importantes archives d'images et de journaux. Il importe que les participants demeurent impliqués dans la direction des prochaines étapes de diffusion de leurs images. Suivant les directives de la sous-étude, les chercheurs développent des visuels pour les soins de santé et les milieux publics, et recensent les occasions pour les participants de partager leur expérience tant dans les milieux cliniques que publics.

Longitudinal Analysis of Antibody Responses to the mRNA BNT162b2 Vaccine in Patients Undergoing Maintenance Hemodialysis: A 6-Month Follow-Up.

Background: Patients on hemodialysis (HD) are at higher risk for COVID-19, overall are poor responders to vaccines, and were prioritized in the Portuguese vaccination campaign. Objective: This work aimed at evaluating in HD patients the immunogenicity of BTN162b2 after the two doses induction phase, the persistence of specific antibodies along time, and factors predicting these outcomes. Methods: We performed a prospective, 6-month long longitudinal cohort analysis of 156 HD patients scheduled to receive BTN162b2. ELISA quantified anti-spike IgG, IgM, and IgA levels in sera were collected every 3 weeks during the induction phase (t0 before vaccine; t1, d21 post first dose; and t2 d21 post second dose), and every 3-4 months during the waning phase (t3, d140, and t4, d180 post first dose). The age-matched control cohort was similarly analyzed from t0 to t2. Results: Upon exclusion of participants identified as previously exposed to SARS-CoV-2, seroconversion at t1 was lower in patients than controls (29 and 50%, respectively, p = 0.0014), while the second vaccine dose served as a boost in both cohorts (91 and 95% positivity, respectively, at t2, p = 0.2463). Lower response in patients than controls at t1 was a singularity of the participants ≤ 70 years (p = 2.01 × 10-05), associated with immunosuppressive therapies (p = 0.013), but not with lack of responsiveness to hepatitis B. Anti-spike IgG, IgM, and IgA levels decreased at t3, with IgG levels further waning at t4 and resulting in >30% seronegativity. Anti-spike IgG levels at t1 and t4 were correlated (ρ = 0.65, p < 2.2 × 10-16). Conclusions: While most HD patients seroconvert upon 2 doses of BNT162b2 vaccination, anti-spike antibodies levels wane over the following 4 months, leading to early seroreversion in a sizeable fraction of the patients. These findings warrant close monitoring of COVID-19 infection in vaccinated HD patients, and advocate for further studies following reinforced vaccination schedules.

The COVID-19 Pandemic Identifies Significant Global Inequities in Hemodialysis Care in Low and Lower-Middle Income Countries-An ISN/DOPPS Survey.

Introduction: It is unknown how the COVID-19 pandemic has affected the care of vulnerable chronic hemodialysis (HD) patients across regions, particularly in low and lower-middle income countries (LLMICs). We aimed to identify global inequities in HD care delivery during the COVID-19 pandemic. Methods: The ISN and the Dialysis Outcomes and Practice Patterns Study (DOPPS) conducted a global online survey of HD units between March and November, 2020, to ascertain practice patterns and access to resources relevant to HD care during the COVID-19 pandemic. Responses were categorized according to World Bank income classification for comparisons. Results: Surveys were returned from 412 facilities in 78 countries: 15 (4%) in low-income countries (LICs), 111 (27%) in lower-middle income countries (LMICs), 145 (35%) in upper-middle income countries (UMICs), and 141 (34%) in high-income countries (HICs). Respondents reported that diagnostic tests for SARS-CoV-2 were unavailable or of limited availability in LICs (72%) and LMICs (68%) as compared with UMICs (33%) and HICs (20%). The number of patients who missed HD treatments was reported to have increased during the COVID-19 pandemic in LICs (64%) and LMICs (67%) as compared with UMICs (31%) and HICs (6%). Limited access to HD, intensive care unit (ICU) care, and mechanical ventilation among hospitalized patients on chronic dialysis with COVID-19 were also reportedly higher in LICs and LMICs as compared with UMICs and HICs. Staff in LLMICs reported less routine testing for SARS-CoV-2 when asymptomatic as compared with UMICs and HICs-14% in LICs and 11% in LMICs, compared with 26% and 28% in UMICs and HICs, respectively. Severe shortages of personal protective equipment (PPE) were reported by the respondents from LICs and LMICs compared with UMICs and HICs, especially with respect to the use of the N95 particulate-air respirator masks. Conclusion: Striking global inequities were identified in the care of chronic HD patients during the pandemic. Urgent action is required to address these inequities which disproportionately affect LLMIC settings thereby exacerbating pre-existing vulnerabilities that may contribute to poorer outcomes.

Seroresponse to SARS-CoV-2 Vaccines among Maintenance Dialysis Patients over 6 Months.

BACKGROUND AND OBJECTIVES: Although most patients receiving maintenance dialysis exhibit initial seroresponse to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination, concerns exist regarding the durability of this antibody response. This study evaluated seroresponse over time. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: This retrospective cohort study included patients on maintenance dialysis, from a midsize national dialysis provider, who received a complete SARS-CoV-2 vaccine series and had at least one antibody titer checked after full vaccination. IgG spike antibodies (anti-spike IgG) titers were assessed monthly with routine laboratory tests after vaccination; the semiquantitative assay reported a range between zero and ≥20 Index. Descriptive analyses compared trends over time by history of coronavirus disease 2019 (COVID-19) and vaccine type. Time-to-event analyses examined the outcome of loss of seroresponse (anti-spike IgG <1 Index or development of COVID-19). Cox regression adjusted for additional clinical characteristics. RESULTS: Among 1870 patients receiving maintenance dialysis, 1569 had no prior COVID-19. Patients without prior COVID-19 had declining titers over time. Among 443 recipients of BNT162b2 (Pfizer), median (interquartile range) anti-spike IgG titer declined from ≥20 (5.89 to ≥20) in month 1 after full vaccination to 1.96 (0.60-5.88) by month 6. Among 778 recipients of mRNA-1273 (Moderna), anti-spike IgG titer declined from ≥20 (interquartile range, ≥20 to ≥20) in month 1 to 7.99 (2.61 to ≥20) by month 6. The 348 recipients of Ad26.COV2.S (Janssen) had a lower titer response than recipients of an mRNA vaccine over all time periods. In time-to-event analyses, recipients of Ad26.COV2.S and mRNA-1273 had the shortest and longest time to loss of seroresponse, respectively. The maximum titer reached in the first 2 months after full vaccination was associated with durability of the anti-spike IgG seroresponse; patients with anti-spike IgG titer 1-19.99 had a shorter time to loss of seroresponse compared with patients with anti-spike IgG titer ≥20 (hazard ratio, 15.5; 95% confidence interval, 11.7 to 20.7). CONCLUSIONS: Among patients receiving maintenance dialysis, vaccine-induced seroresponse wanes over time across vaccine types. Early titers after full vaccination are associated with the durability of seroresponse.

Efficacy of systematic coronavirus screening by PCR and viral cultures in addition to triage in limiting the spread of SARS-CoV-2 within a hemodialysis unit.

BACKGROUND: Patients with end-stage-renal-disease (ESRD) undergoing hemodialysis (HD) represent a vulnerable population for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection, due to their intrinsic fragility and increased exposure to the virus. Therefore, applying effective screening strategies and infection control measures is essential to control the spread of the epidemic within hemodialysis centers. OBJECTIVE: Description and evaluation of the efficacy of systematic screening by rt-PCR and viral cultures, in addition to triage to limit the spread of the epidemic. Evaluation of the performance of these tests using "post-hoc" SARS-CoV-2 serology as a surrogate marker of infection. METHODS: One hundred and forty-four patients undergoing hemodialysis in the Nephrology-Hemodialysis center of CHU Brugmann, Brussels, benefited from systematic virological screening using viral cultures in asymptomatic patients, or molecular tests (rt-PCR) for symptomatic ones, in addition to general prevention measures. Post-hoc serology was performed in all patients. RESULTS: Thirty-eight (26.3%) individuals were infected with SARS-CoV-2. Seventeen infected patients (44.7%) were asymptomatic and thus detected by viral culture. Our strategy allowed us to detect and isolate 97.4% of the infected patients, as proven by post-hoc serology. Only one patient, missed by clinical screening and sequential viral cultures, had a positive serology. CONCLUSION: The implementation of a control and prevention strategy based on a systematic clinical and virological screening showed its effectiveness in limiting (and shortening) the spread of the SARS-CoV-2 epidemic within our hemodialysis unit.

Therapeutic dilemmas in dialysis patients hospitalized for COVID-19: balancing between nihilism, off-label treatment and side effects.

Avoiding the use of drugs in patients with a glomerular filtration rate (GFR) <30 mL/min/1.73 m2 is due to the exclusion of this group of patients from many clinical trials. However, in view of the widespread COVID-19 pandemic and the need to treat all patients, including those with renal failure, the World Health Organization points out in the Solidarity trial the need for the inclusion some patients with kidney failure and recognizes the urgent need for trials/studies in patients with coronavirus disease 2019 (COVID-19) with lower GFR. It is well known that the therapeutic goal to treat patients with renal failure, acute kidney injury or on maintenance dialysis is complicated by pharmacokinetics, drug interactions and extracorporeal therapies. In patients with COVID-19 and impaired kidney function, the role of nephrologists is crucial in order to draw a balance between nihilism and benefits or potentially harmful effects of current available treatments. The potential use of European Medicines Agency recommended remdesivir and dexamethasone for COVID-19 among dialysis patients are discussed.

Clinical features and outcome of maintenance hemodialysis patients with COVID-19 from a tertiary nephrology care center in Romania.

BACKGROUND: There is limited information about the clinical characteristics, treatment and outcome of maintenance hemodialysis patients with COVID-19. Moreover, regional differences are also conceivable since the extend and severity of outbreaks varied among countries. METHODS: In this retrospective, observational, single-center study, we analyzed the clinical course and outcomes of 37 maintenance hemodialysis patients (median age 64 years, 51% men) hospitalized with COVID-19 from 24 March to 22 May 2020 as confirmed by real-time PCR. RESULTS: The most common symptoms at admission were fatigue (51%), fever (43%), dyspnea (38%) and cough (35%). There were 59% mild/moderate patients and 41% severe/critical patients. Patients in the severe/critical group had a significantly higher atherosclerotic burden since diabetic kidney disease and vascular nephropathies were the most common primary kidney diseases and eighty percent of them had coronary heart disease. Also, Charlson comorbidity score was higher in this group. At admission chest X-ray, 46% had ground-glass abnormalities. Overall, 60% patients received hydroxychloroquine, 22% lopinavir-ritonavir, 11% tocilizumab, 24% systemic glucocorticoids, and 54% received prophylactic anticoagulation. Seven (19%) patients died during hospitalization and 30 were discharged. The main causes of death were cardiovascular (5 patients) and respiratory distress syndrome (2 patients). In Cox regression analysis, lower oxygen saturation, anemia and hypoalbuminemia at admission were associated with increased mortality. CONCLUSIONS: In conclusion, we observed a high mortality rate among maintenance hemodialysis patients hospitalized for COVID-19. Anemia, lower serum albumin and lower basal oxygen saturation at admission were factors associated with poor prognosis.