4,136 results on '"Ravani, A"'
Search Results
2. Global variations in funding and use of hemodialysis accesses: an international report using the ISN Global Kidney Health Atlas
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Ghimire, Anukul, Shah, Samveg, Chauhan, Utkarsh, Ibrahim, Kwaifa Salihu, Jindal, Kailash, Kazancioglu, Rumeyza, Luyckx, Valerie A., MacRae, Jennifer M., Olanrewaju, Timothy O., Quinn, Robert R., Ravani, Pietro, Shah, Nikhil, Thompson, Stephanie, Tungsanga, Somkanya, Vachharanjani, Tushar, Arruebo, Silvia, Caskey, Fergus J., Damster, Sandrine, Donner, Jo-Ann, Jha, Vivekanand, Levin, Adeera, Malik, Charu, Nangaku, Masaomi, Saad, Syed, Tonelli, Marcello, Ye, Feng, Okpechi, Ikechi G., Bello, Aminu K., and Johnson, David W.
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- 2024
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3. Global variations in funding and use of hemodialysis accesses: an international report using the ISN Global Kidney Health Atlas
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Anukul Ghimire, Samveg Shah, Utkarsh Chauhan, Kwaifa Salihu Ibrahim, Kailash Jindal, Rumeyza Kazancioglu, Valerie A. Luyckx, Jennifer M. MacRae, Timothy O. Olanrewaju, Robert R. Quinn, Pietro Ravani, Nikhil Shah, Stephanie Thompson, Somkanya Tungsanga, Tushar Vachharanjani, Silvia Arruebo, Fergus J. Caskey, Sandrine Damster, Jo-Ann Donner, Vivekanand Jha, Adeera Levin, Charu Malik, Masaomi Nangaku, Syed Saad, Marcello Tonelli, Feng Ye, Ikechi G. Okpechi, Aminu K. Bello, and David W. Johnson
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Arteriovenous fistulas ,Central venous catheters ,Dialysis ,Global kidney Health Atlas ,International Society of Nephrology ,Kidney failure ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Abstract Background There is a lack of contemporary data describing global variations in vascular access for hemodialysis (HD). We used the third iteration of the International Society of Nephrology Global Kidney Health Atlas (ISN-GKHA) to highlight differences in funding and availability of hemodialysis accesses used for initiating HD across world regions. Methods Survey questions were directed at understanding the funding modules for obtaining vascular access and types of accesses used to initiate dialysis. An electronic survey was sent to national and regional key stakeholders affiliated with the ISN between June and September 2022. Countries that participated in the survey were categorized based on World Bank Income Classification (low-, lower-middle, upper-middle, and high-income) and by their regional affiliation with the ISN. Results Data on types of vascular access were available from 160 countries. Respondents from 35 countries (22% of surveyed countries) reported that > 50% of patients started HD with an arteriovenous fistula or graft (AVF or AVG). These rates were higher in Western Europe (n = 14; 64%), North & East Asia (n = 4; 67%), and among high-income countries (n = 24; 38%). The rates of > 50% of patients starting HD with a tunneled dialysis catheter were highest in North America & Caribbean region (n = 7; 58%) and lowest in South Asia and Newly Independent States and Russia (n = 0 in both regions). Respondents from 50% (n = 9) of low-income countries reported that > 75% of patients started HD using a temporary catheter, with the highest rates in Africa (n = 30; 75%) and Latin America (n = 14; 67%). Funding for the creation of vascular access was often through public funding and free at the point of delivery in high-income countries (n = 42; 67% for AVF/AVG, n = 44; 70% for central venous catheters). In low-income countries, private and out of pocket funding was reported as being more common (n = 8; 40% for AVF/AVG, n = 5; 25% for central venous catheters). Conclusions High income countries exhibit variation in the use of AVF/AVG and tunneled catheters. In low-income countries, there is a higher use of temporary dialysis catheters and private funding models for access creation.
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- 2024
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4. Exploring the barriers and facilitators experienced by patients with heart failure when using popular exergaming platforms for self-management—a systematic review
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Elham Ravani, Fai Ali, Sara Albuainain, Sara Flamarzi, Tuqa Dirar, Michelle O’Brien, and Linzette Morris
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Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Objective To systematically explore the barriers and facilitators experienced by patients with heart failure when using the most popular commercially-accessible digital exergaming platforms for self-management. Methods A systematic literature search was conducted in: Embase , SCOPUS , PubMed , and ProQuest . Qualitative/mixed methods studies published in English between 2000 and 2024, including adults >18 years with heart failure using digital gaming platforms for exercise as self-management (i.e. Microsoft Xbox/Kinect, Sony PlayStation®, Nintendo™ Wii) were considered. Risk of bias was assessed using the Critical Appraisal Skills Program. The grounded theory method was used to extract, analyze, and synthesize the data. Results Three articles which qualitatively reported on the experiences of the patients with heart failure when using Nintendo™ Wii for self-management were included. Seventy-nine participants (male and female, age 32–81 years) were included in the studies. The three included studies were of high quality. Extracted qualitative data were grouped into subthemes, which were grouped into main themes, namely, Engagement, A pathy, Convenience, Health-related benefits and Gaming Platforms . The main themes were categorized into Barriers and Facilitators. Patients reported that gaming platforms were simple, easy to use, interesting, and motivating ( Facilitators ). Boredom while playing specific games, preferring other activities and technical issues were reported as Barriers . Conclusion This review provides the first insights into the barriers and facilitators patients with heart failure experience when using popular digital exergaming platforms to participate in exercise programs in the self-management of their condition. However, few high-quality studies exist which limits the conclusions made and warrants further research in this area.
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- 2024
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5. Life cycle assessment of a high-tech vertical decoupled aquaponic system for sustainable greenhouse production
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Maria Ravani, Ioanna Chatzigeorgiou, Nikolaos Monokrousos, Ioannis A. Giantsis, and Georgios K. Ntinas
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product carbon footprint ,aquaponics ,greenhouse ,vertical system ,greenhouse gas emissions ,sustainable production ,Economic theory. Demography ,HB1-3840 - Abstract
IntroductionAquaponics provide multiple benefits due to the simultaneous yield of vegetables and fish, however they are characterized by increased greenhouse gas emissions owing to intensive production system. The most appropriate method for quantifying the environmental effects of these systems is Life Cycle Assessment with which the identification of hotspots and the suggestion of improved production plans can be achieved. The purpose of the present study was to evaluate the environmental impact of a pilot high-tech aquaponic system utilized for the simultaneous production of baby lettuce and rocket as well as rainbow trout, in indicators such as Global Warming Potential.Materials and methodsTo achieve this goal, data on inputs and outputs were collected from 12 case studies that were implemented, combining different fertilizer treatments, substrate choices, plant species cultivated and water source provision. Life Cycle Assessment was performed using SimaPro v.9.4.0.2 software.ResultsThe results showcase that the optimal case studies include the cultivation of baby lettuce and rocket in perlite substrate using wastewater from fish and partial use of synthetic fertilizers. Indicatively, Global Warming Potential of these cases was calculated at 21.18 and 40.59 kg CO2-eq/kg of vegetable respectively. The parameter with the greatest impact on most of the environmental indicators was electricity consumption for the operation of the oxygen supply pump for the fish tanks, while greenhouse infrastructure had the greatest impact in Abiotic Depletion and Human Toxicity impact categories. In an alternative production scenario tested where renewable energy sources were used, system impacts were reduced by up to 50% for Global Warming Potential and 86% for Eutrophication impact. The results of this study aspire to constitute a significant milestone in environmental impact assessments of aquaponic production systems and the adoption of more sustainable farming practices.
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- 2024
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6. Greenhouse production of baby leaf vegetables using rainbow trout wastewater in a high-tech vertical decoupled aquaponic system
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Ioanna Chatzigeorgiou, Maria Ravani, Dimitrios K. Papadopoulos, George Kelesidis, Ioannis A. Giantsis, Aphrodite Tsaballa, Athanasios Koukounaras, and Georgios K. Ntinas
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decoupled aquaponics ,recirculating aquaculture system ,hydroponics ,deep water culture ,land use efficiency ,water use efficiency ,Plant culture ,SB1-1110 - Abstract
IntroductionAquaponics is an integrated food production system that links recirculating aquaculture with hydroponics, leading to higher water use efficiency than conventional food production systems while also saving on fertilizers. In the present study, baby lettuce and baby rocket plants cultivated hydroponically in a deep water culture system using wastewater from rainbow trout were evaluated as part of a vertical decoupled aquaponic system.Materials and methodsMore specifically, three different nutrient solutions were supplied: a) using fish wastewater only (designated as Fish); b) fish wastewater enriched with synthetic fertilizers (Mix); and c) a typical nutrient solution (Hoagland) as the control. Both lettuce and rocket plants were monitored in these nutrient solutions and in two different substrates, peat and perlite, as an organic and an inert substrate, respectively. The purpose of this study was to assess a vertical decoupled aquaponic system with regard to the resource use efficiency, such as water, land, and energy, while evaluating plant cultivation in the different treatments in terms of yield, growth, nitrate concentration on the leaf tissue, and foliar analysis. The photosynthetic rate and leaf color indices were also considered in the plant evaluation.ResultsThe Mix–Peat treatment was the most efficient growing combination in terms of land and water use efficiency, with approximately 7% better land use efficiency while using 38% less water and 10% less fertilizer than Hoagland–Peat. Moreover, lettuce plants had the highest yield in the Mix–Peat treatment, at 2,497 g m−2, which was approximately 6% higher than that of Hoagland–Peat while not being inferior in the quality measures. On the other hand, the yield of rocket was significantly higher in the Hoagland–Peat treatment, being 18% higher than that of Mix–Peat and 30% higher than that of Fish–Peat. Overall, the study confirmed that aquaponic systems could lead to higher water use efficiency and savings in fertilizers without undermining the yield and quality of lettuce, while the vertical arrangement developed within the scope of this study can increase the land useefficiency of the system.
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- 2024
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7. Beetroot-based blended juice: Process development, physico-chemical analysis and optimization of novel health drink
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Tabbu Theba, Pratik Nayi, and Amee Ravani
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Functional beverages ,Betalains ,Blended juice ,Sensory characteristics ,New product development ,Food processing and manufacture ,TP368-456 - Abstract
The demand for the preparation of functional and nutrients-rich juice or beverages for the boosting immunity is the prime focus of consumers. So, this study was aim to optimization of different proportion for the preparation of blended juice from beetroots, grapes, turmeric, and lemons by using response surface methodology (RSM) and assessment of the quality parameters such as acidity, ascorbic acid, antioxidant activity and overall acceptability of blend juice were considered. Beetroot is widely recognized for its pigments known as betalains and have been utilized in the development of functional food and beverage products. Beetroots, grapes, turmeric, and lemons have been used in this study to prepare functional drinks, known for their nutritional value and medicinal properties. To optimize the blend juice, the dependent variables mainly beetroot juice, grapes juice, turmeric juice, and lemon juice in the range of 50–60, 30–40, 1–5, and 1–5 mL, were selected respectively. The optimized formulation for blended juice with a maximum desirability value of 0.921, an acidity of 0.60 %, an ascorbic acid of 14.17 mg/100 mL, an antioxidant activity of 93.94 %, and an overall acceptability of 8.07 was finalized at 53.12 mL of beetroot juice, 40 mL of grapes juice, 1.88 mL of turmeric juice and 5 mL of lemon juice.
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- 2024
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8. Beetroot-based blended juice: Process development, physico-chemical analysis and optimization of novel health drink
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Theba, Tabbu, Nayi, Pratik, and Ravani, Amee
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- 2024
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9. Health related quality of life during dialysis modality transitions: a qualitative study
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Dumaine, Chance S., Fox, Danielle E., Ravani, Pietro, Santana, Maria J., and MacRae, Jennifer M.
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- 2023
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10. Health related quality of life during dialysis modality transitions: a qualitative study
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Chance S. Dumaine, Danielle E. Fox, Pietro Ravani, Maria J. Santana, and Jennifer M. MacRae
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Transitions ,Health related quality of life ,Kidney failure ,Dialysis ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Abstract Background Modality transitions represent a period of significant change that can impact health related quality of life (HRQoL). We explored the HRQoL of adults transitioning to new or different dialysis modalities. Methods We recruited eligible adults (≥ 18) transitioning to dialysis from pre-dialysis or undertaking a dialysis modality change between July and September 2017. Nineteen participants (9 incident and 10 prevalent dialysis patients) completed the KDQOL-36 survey at time of transition and three months later. Fifteen participants undertook a semi-structured interview at three months. Qualitative data were thematically analyzed. Results Four themes and five sub-themes were identified: adapting to new circumstances (tackling change, accepting change), adjusting together, trading off, and challenges of chronicity (the impact of dialysis, living with a complex disease, planning with uncertainty). From the first day of dialysis treatment to the third month on a new dialysis therapy, all five HRQoL domains from the KDQOL-36 (symptoms, effects, burden, overall PCS, and overall MCS) improved in our sample (i.e., those who remained on the modality). Conclusions Dialysis transitions negatively impact the HRQoL of people with kidney disease in various ways. Future work should focus on how to best support people during this time.
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- 2023
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11. A Holistic Framework for Factory Planning Using Reinforcement Learning
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Klar, M., Mertes, J., Glatt, M., Ravani, B., Aurich, J. C., Aurich, Jan C., editor, Garth, Christoph, editor, and Linke, Barbara S., editor
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- 2023
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12. Modeling and Implementation of a 5G-Enabled Digital Twin of a Machine Tool Based on Physics Simulation
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Mertes, J., Glatt, M., Yi, L., Klar, M., Ravani, B., Aurich, J. C., Aurich, Jan C., editor, Garth, Christoph, editor, and Linke, Barbara S., editor
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- 2023
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13. Phase Field Simulations for Fatigue Failure Prediction in Manufacturing Processes
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Yan, S., Müller, R., Ravani, B., Aurich, Jan C., editor, Garth, Christoph, editor, and Linke, Barbara S., editor
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- 2023
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14. Framework to Improve the Energy Performance During Design for Additive Manufacturing
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Yi, L., Wu, X., Glatt, M., Ravani, B., Aurich, J. C., Aurich, Jan C., editor, Garth, Christoph, editor, and Linke, Barbara S., editor
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- 2023
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15. Thermomechanical fatigue life simulation using the phase field method
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Yan, Sikang, Müller, Ralf, and Ravani, Bahram
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- 2024
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16. Risk Factors for Developing Low Estimated Glomerular Filtration Rate and Albuminuria in Living Kidney Donors
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Dhalla, Anisha, Ravani, Pietro, Quinn, Robert R., Garg, Amit X., Clarke, Alix, Al-Wahsh, Huda, Lentine, Krista L., Klarenbach, Scott, Hemmelgarn, Brenda R., Wang, Carol, and Lam, Ngan N.
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- 2024
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17. Development of a Machine Learning Model that represents the characteristics of a Manufacturing Systems
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Klar, Matthias, Rüdiger, Patrick, Scheidt, Marcel, Hussong, Marco, Glatt, Moritz, Ravani, Bahram, and Aurich, Jan C.
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- 2024
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18. Proton Pump Inhibitors Use in Kidney Transplant Recipients: A Population-Based Study
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James Kiberd, Robert R. Quinn, Pietro Ravani, Krista L. Lentine, Alix Clarke, Rachel Jeong, Labib Faruque, and Ngan N. Lam
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Background: Kidney transplant recipients are commonly prescribed proton-pump inhibitors (PPIs), but due to concern for polypharmacy, chronic use should be limited. Objective: The objective was to describe PPI use in kidney transplant recipients beyond their first year of transplant to better inform and support deprescribing initiatives. Design: We conducted a retrospective, population-based cohort study using linked health care databases. Setting: This study was conducted in Alberta, Canada. Patients: We included all prevalent adult, kidney-only transplant recipients between April 2008 and December 2017 who received their transplant between May 2002 and December 2017. Measurements: The primary outcome was ongoing or new PPI use and patterns of use, including frequency and duration of therapy, and assessment of indication for PPI use. Methods: We ascertained baseline characteristics, covariate information, and outcome data from the Alberta Kidney Disease Network (AKDN). We compared recipients with evidence of a PPI prescription in the 3 months prior to study entry to those with a histamine-2-receptor antagonist (H2Ra) fill and those with neither. Results: We identified 1823 kidney transplant recipients, of whom 868 (48%) were on a PPI, 215 (12%) were on an H2Ra, and 740 (41%) were on neither at baseline. Over a median follow-up of 5.4 years (interquartile range [IQR] = 2.6-9.3), there were almost 45 000 unique PPI prescriptions dispensed, the majority (80%) of which were filled by initial PPI users. Recipients who were on a PPI at baseline would spend 91% (IQR = 70-98) of their graft survival time on a PPI in follow-up, and nephrologists were the main prescribers. We identified an indication for ongoing PPI use in 54% of recipients with the most common indication being concurrent antiplatelet use (26%). Limitations: Our kidney transplant recipients have access to universal health care coverage which may limit generalizability. We identified common gastrointestinal indications for PPI use but did not include rare conditions due to concerns about the validity of diagnostic codes. In addition, symptoms suggestive of reflux may not be well coded as the focus of follow-up visits is more likely to focus on kidney transplant. Conclusions: Many kidney transplant recipients are prescribed a PPI at, or beyond, the 1-year post-transplant date and are likely to stay on a PPI in follow-up. Almost half of the recipients in our study did not have an identifiable indication for ongoing PPI use. Nephrologists frequently prescribe PPIs to kidney transplant recipients and should be involved in deprescribing initiatives to reduce polypharmacy.
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- 2024
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19. Risk Factors for Developing Low Estimated Glomerular Filtration Rate and Albuminuria in Living Kidney Donors
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Anisha Dhalla, Pietro Ravani, Robert R. Quinn, Amit X. Garg, Alix Clarke, Huda Al-Wahsh, Krista L. Lentine, Scott Klarenbach, Brenda R. Hemmelgarn, Carol Wang, and Ngan N. Lam
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Albuminuria ,chronic kidney disease ,donor nephrectomy ,kidney donation ,living kidney donors ,transplant ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Rationale & Objective: Chronic kidney disease is associated with significant morbidity and mortality in the general population, but little is known about the incidence and risk factors associated with developing low estimated glomerular filtration rate (eGFR) and moderate-severe albuminuria in living kidney donors following nephrectomy. Study Design: Retrospective, population-based cohort study. Setting & Participants: Kidney donors in Alberta, Canada. Exposure: Donor nephrectomy between May 2001 and December 2017. Outcome: Two eGFR measurements
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- 2024
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20. Preface
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Garth, C, Aurich, JC, Linke, B, Müller, R, Ravani, B, Weber, GH, and Kirsch, B
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- 2021
21. Impaired Renal Function and Major Cardiovascular Events in Young Adults
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Hussain, Junayd, Imsirovic, Haris, Canney, Mark, Clark, Edward G., Elliott, Meghan J., Ravani, Pietro, Tanuseputro, Peter, Akbari, Ayub, Hundemer, Gregory L., Ramsay, Tim, Tangri, Navdeep, Knoll, Greg A., and Sood, Manish M.
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- 2023
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22. Nurse Practitioner Care Compared with Primary Care or Nephrologist Care in Early CKD
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James, Matthew T., Scory, Tayler D., Novak, Ellen, Manns, Braden J., Hemmelgarn, Brenda R., Bello, Aminu K., Ravani, Pietro, Kahlon, Bhavneet, MacRae, Jennifer M., and Ronksley, Paul E.
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- 2023
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23. Determinants of Carotid Wall Echolucency in a Cohort of European High Cardiovascular Risk Subjects: A Cross-Sectional Analysis of IMPROVE Baseline Data
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Beatrice Frigerio, Daniela Coggi, Alice Bonomi, Mauro Amato, Nicolò Capra, Gualtiero I. Colombo, Daniela Sansaro, Alessio Ravani, Kai Savonen, Philippe Giral, Antonio Gallo, Matteo Pirro, Bruna Gigante, Per Eriksson, Rona J. Strawbridge, Douwe J. Mulder, Elena Tremoli, Fabrizio Veglia, and Damiano Baldassarre
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echolucency ,gray-scale median ,atherosclerosis ,carotid plaque ,intima–media thickness ,cardiovascular ,Biology (General) ,QH301-705.5 - Abstract
Echolucency, a measure of plaque instability associated with increased cardiovascular risk, can be assessed in both the carotid plaque and the plaque-free common carotid intima–media (IM) complex as a gray-scale median (plaque-GSM and IM-GSM, respectively). The impact of specific vascular risk factors on these two phenotypes remains uncertain, including the nature and extent of their influence. This study aims to seek the determinants of plaque-GSM and IM-GSM. Plaque-GSM and IM-GSM were measured in subjects from the IMPROVE study cohort (aged 54–79, 46% men) recruited in five European countries. Plaque-GSM was measured in subjects who had at least one IMTmax ≥ 1.5 mm (n = 2138), whereas IM-GSM was measured in all subjects included in the study (n = 3188). Multiple regression with internal cross-validation was used to find independent predictors of plaque-GSM and IM-GSM. Plaque-GSM determinants were plaque-size (IMTmax), and diastolic blood pressure. IM-GSM determinants were the thickness of plaque-free common carotid intima–media complex (PF CC-IMTmean), height, systolic blood pressure, waist/hip ratio, treatment with fibrates, mean corpuscular volume, treatment with alpha-2 inhibitors (sartans), educational level, and creatinine. Latitude, and pack-yearscode were determinants of both plaque-GSM and IM-GSM. The overall models explain 12.0% of plaque-GSM variability and 19.7% of IM-GSM variability. A significant correlation (r = 0.51) was found between plaque-GSM and IM-GSM. Our results indicate that IM-GSM is a weighty risk marker alternative to plaque-GSM, offering the advantage of being readily measurable in all subjects, including those in the early phases of atherosclerosis where plaque occurrence is relatively infrequent.
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- 2024
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24. Alignment Among Patient, Caregiver, and Health Care Provider Perspectives on Hemodialysis Vascular Access Decision-Making: A Qualitative Study
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Angela R. Schneider, Pietro Ravani, Kathryn M. King-Shier, Robert R. Quinn, Jennifer M. MacRae, Shannan Love, Matthew J. Oliver, Swapnil Hiremath, Matthew T. James, Mia Ortiz, Braden R. Manns, and Meghan J. Elliott
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Background: Updates to the Kidney Disease Outcomes Quality Initiative Clinical Practice Guideline for Vascular Access emphasize the “right access, in the right patient, at the right time, for the right reasons.” Although this implies a collaborative approach, little is known about how patients, their caregivers, and health care providers engage in vascular access (VA) decision-making. Objective: To explore how the perspectives of patients receiving hemodialysis, their caregivers, and hemodialysis care team align and diverge in relation to VA selection. Design: Qualitative descriptive study. Setting: Five outpatient hemodialysis centers in Calgary, Alberta. Participants: Our purposive sample included 19 patients receiving maintenance hemodialysis, 2 caregivers, and 21 health care providers (7 hemodialysis nurses, 6 VA nurses, and 8 nephrologists). Methods: We conducted semi-structured interviews with consenting participants. Using an inductive thematic analysis approach, we coded transcripts in duplicate and characterized themes addressing our research objective. Results: While participants across roles shared some perspectives related to VA decision-making, we identified areas where views diverged. Areas of alignment included (1) optimizing patient preparedness—acknowledging decisional readiness and timing, and (2) value placed on trusting relationships with the kidney care team—respecting decisional autonomy with guidance. Perspectives diverged in the following aspects: (1) differing VA priorities and preferences—patients’ emphasis on minimizing disruptions to normalcy contrasted with providers’ preferences for fistulas and optimizing biomedical parameters of dialysis; (2) influence of personal and peer experience—patients preferred pragmatic, experiential knowledge, whereas providers emphasized informational credibility; and (3) endpoints for VA review—reassessment of VA decisions was prompted by access dissatisfaction for patients and a medical imperative to achieve a functioning access for health care providers. Limitations: Participation was limited to individuals comfortable communicating in English and from urban, in-center hemodialysis units. Few informal caregivers of people receiving hemodialysis and younger patients participated in this study. Conclusions: Although patients, caregivers, and healthcare providers share perspectives on important aspects of VA decisions, conflicting priorities and preferences may impact the decisional outcome. Findings highlight opportunities to bridge knowledge and readiness gaps and integrate shared decision-making in the VA selection process.
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- 2023
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25. Impact of periprocedural myocardial injury after transcatheter aortic valve implantation on long-term mortality: a meta-analysis of Kaplan-Meier derived individual patient data
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Mauricio Felippi de Sá Marchi, Pedro Calomeni, Mateus de Miranda Gauza, Gabriel Kanhouche, Lis Victória Ravani, Caio Vinicius Fernandes Rodrigues, Flávio Tarasoutchi, Fábio Sandoli de Brito, Josep Rodés-Cabau, Nicolas M. Van Mieghem, Alexandre Abizaid, and Henrique Barbosa Ribeiro
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aortic stenosis ,transcatheter aortic valve implantation ,transcatheter aortic valve replacement ,periprocedural myocardial injury ,biomarkers ,valvular heart disease ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
BackgroundPeriprocedural myocardial injury (PPMI) frequently occurs after transcatheter aortic valve implantation (TAVI), although its impact on long-term mortality is uncertain.MethodsWe performed a pooled analysis of Kaplan-Meier-derived individual patient data to compare survival in patients with and without PPMI after TAVI. Flexible parametric models with B-splines and landmark analyses were used to determine PPMI prognostic value. Subgroup analyses for VARC-2, troponin, and creatine kinase-MB (CK-MB)-defined PPMI were also performed.ResultsEighteen observational studies comprising 10,094 subjects were included. PPMI was associated with lower overall survival (OS) after two years (HR = 1.46, 95% CI 1.30–1.65, p
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- 2023
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26. Follow-up Care of Critically Ill Patients With Acute Kidney Injury: A Cohort Study
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Jeong, Rachel, James, Matthew T., Quinn, Robert R., Ravani, Pietro, Bagshaw, Sean M., Stelfox, Henry T., Pannu, Neesh, Clarke, Alix, Wald, Ron, Harrison, Tyrone G., Niven, Daniel J., and Lam, Ngan N.
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- 2023
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27. Safety and Effectiveness of Rivaroxaban Versus Warfarin Across GFR Levels in Atrial Fibrillation: A Population-Based Study in Australia and Canada
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Ha, Jeffrey T., Scaria, Anish, Andrade, Jason, Badve, Sunil V., Birks, Peter, Bota, Sarah E., Campain, Anna, Djurdjev, Ognjenka, Garg, Amit X., Harel, Ziv, Hemmelgarn, Brenda, Hockham, Carinna, James, Matthew T., Jardine, Meg J., Lam, Dickson, Levin, Adeera, McArthur, Eric, Ravani, Pietro, Shao, Selena, Sood, Manish M., Tan, Zhi, Tangri, Navdeep, Whitlock, Reid, Gallagher, Martin, and Jun, Min
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- 2023
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28. A simulation-based factory layout planning approach using reinforcement learning
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Klar, Matthias, Glatt, Moritz, Ravani, Bahram, and Aurich, Jan C.
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- 2023
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29. Follow-up Care of Critically Ill Patients With Acute Kidney Injury: A Cohort StudyPlain Language Summary
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Rachel Jeong, Matthew T. James, Robert R. Quinn, Pietro Ravani, Sean M. Bagshaw, Henry T. Stelfox, Neesh Pannu, Alix Clarke, Ron Wald, Tyrone G. Harrison, Daniel J. Niven, and Ngan N. Lam
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Acute kidney injury ,acute kidney injury ,chronic kidney disease ,critical care nephrology ,follow-up care ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Rationale & Objective: To evaluate follow-up care of critically ill patients with acute kidney injury (AKI). Study Design: Retrospective cohort study. Setting & Participants: Patients admitted to the intensive care unit (ICU) with AKI in Alberta, Canada from 2005 to 2018, who survived to discharge without kidney replacement therapy or estimated glomerular filtration rate
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- 2023
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30. Rationale and design of the CV-PREVITAL study: an Italian multiple cohort randomised controlled trial investigating innovative digital strategies in primary cardiovascular prevention
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Roberta Pastorino, Eloisa Arbustini, Andrea Faini, Gianfranco Parati, Grzegorz Bilo, Davide Soranna, Antonella Zambon, Sergio Leonardi, Alessandro Gialluisi, Lorenzo Giovanni Mantovani, Walter Ricciardi, Fabio Blandini, Giovanni Scambia, Catherine Klersy, Marialaura Bonaccio, Augusto Di Castelnuovo, Simona Costanzo, Amalia De Curtis, Mariarosaria Persichillo, Chiara Cerletti, Maria Benedetta Donati, Licia Iacoviello, Giuseppe Remuzzi, Camilla Torlasco, Giuseppe Ambrosio, Gabriele Zoppoli, Maria Chiara Grimaldi, Daniela Pedicino, Giovanna Liuzzo, Serena Pelusi, Daniele Prati, Luca Valenti, Francesca Gorini, Maurizio Sanguinetti, Giuseppe Ferrante, Gianluigi Condorelli, Giulio Pompilio, Stefania Boccia, Luigi Badano, Victor Savevski, Tiziana Bachetti, Gian Franco Gensini, Silvano Bosari, Alice Bonanni, Elena Tremoli, Angelo Santoliquido, Stefano Genovese, Sara Boveri, Gianfranco Gensini, Francesco Gianfagna, Italo Porto, Fabio Tuzzolino, Carolina Lombardi, Egidio Traversi, Fabrizio Veglia, Andrea Urbani, Domenico D’Amario, Gaetano Antonio Lanza, Antonio Uccelli, José Pablo Werba, Livio Luzi, Pietro Ameri, Davide Gentilini, Luisa Gilardini, Cecilia Invitti, Maurizio Volterrani, Maria Teresa La Rovere, Giovanni Gentile, Francesco Clemenza, Mario Urtis, Francesca Ieva, Maria Carla Roncaglioni, Valentina Milani, Paola Baiardi, Debora Rosa, Fabiana Madotto, Emilia Ruggiero, Teresa Panzera, Simona Esposito, Sara Magnacca, Fabrizia Noro, Roberta Parisi, Francesca Bracone, Irene Baroni, Damiano Baldassarre, Roberta Baetta, Luigi Frati, Pier Giulio Conaldi, Massimo Fini, Antonio Di Malta, Mauro Amato, Alice Bonomi, Francesca Colazzo, Martino Pengo, Luciana Auteri, Marta Baviera, Alberico Catapano, Alexis Elias Malavazos, Serenella Castelvecchio, Massimiliano Marco Corsi-Romanelli, Rosanna Cardani, Valentina Agnese, Bianca Pane, Laura Spinardi, Marco Visconti, Anna Di Blasio, Luisa Ojeda-Fernández, Andreana Foresta, Simonetta Scalvini, Antonia Pierobon, Alessandra Gorini, Annarosa Racca, Manuela Bandi, Lorenzo Menicanti, Gualtiero Colombo, Chiara Vavassori, Maria Luisa Biondi, Beatrice Frigerio, Alessio Ravani, Daniela Sansaro, Daniela Coggi, Alessandra Romandini, Monica Giroli, Mattia Giuliani, Maurizio Rondinelli, Catia Trudu, Carmen Cinieri, Massimo Monturano, Elisa Perger, Lucia Zanotti, Lidia Cova, Luca Grappiolo, Laura Papa, Ignazio Romano, Luisa Ojeda, Fiorenza Clerici, Angela Palumbo, Roberto Mattioli, Ermanno Longhi, Anwal Ghulam, Sabatino Orlandi, Sabrina Franciosa, Martina Morelli, Fiorella De Rita, Giovanni de Gaetano, Massimiliano MarcoCorsi Romanelli, Ambra Cerri, Carola Dubini, Manuel Bruno Trevisan, Laura Valentina Renna, Paola Giubbilini, Lucia Ramputi, Giada DeAngeli, Francesca Olmetti, Maurizio Bussotti, Carlo Gaetano, Martina Balbi, Laura Comini, Monica Lorenzoni, Adriana Olivares, Camilla Garrè, Riccardo Sideri, Giuseppe Caruana, Nicola Cuscino, Gabriele Di Gesaro, Alessio Greco, Italia Loddo, Domenico Palombo, Giovanni Spinella, Gaddiel Mozzetta, Alice Finotello, Giovanni Pratesi, Margherita Clerici, Cristiana Bianco, Rossana Carpani, Giulia Periti, Sara Margarita, Anna Severino, Alessia D’Aiello, Ramona Vinci, Mattia Brecciaroli, Simone Filomia, Luca Proto, Dalila Tarquini, Arianna Elia, Alessia Currao, Alessandro Di Toro, Lorenzo Giuliani, Giuseppe Caminiti, Federica Marcolongo, Barbara Sposato, Fiorella Guadagni, Valentina Morsella, Angelica Marziale, and Giulia Protti
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Medicine - Abstract
Introduction Prevention of cardiovascular disease (CVD) is of key importance in reducing morbidity, disability and mortality worldwide. Observational studies suggest that digital health interventions can be an effective strategy to reduce cardiovascular (CV) risk. However, evidence from large randomised clinical trials is lacking.Methods and analysis The CV-PREVITAL study is a multicentre, prospective, randomised, controlled, open-label interventional trial designed to compare the effectiveness of an educational and motivational mobile health (mHealth) intervention versus usual care in reducing CV risk. The intervention aims at improving diet, physical activity, sleep quality, psycho-behavioural aspects, as well as promoting smoking cessation and adherence to pharmacological treatment for CV risk factors. The trial aims to enrol approximately 80 000 subjects without overt CVDs referring to general practitioners’ offices, community pharmacies or clinics of Scientific Institute for Research, Hospitalization and Health Care (Italian acronym IRCCS) affiliated with the Italian Cardiology Network. All participants are evaluated at baseline and after 12 months to assess the effectiveness of the intervention on short-term endpoints, namely improvement in CV risk score and reduction of major CV risk factors. Beyond the funded life of the study, a long-term (7 years) follow-up is also planned to assess the effectiveness of the intervention on the incidence of major adverse CV events. A series of ancillary studies designed to evaluate the effect of the mHealth intervention on additional risk biomarkers are also performed.Ethics and dissemination This study received ethics approval from the ethics committee of the coordinating centre (Monzino Cardiology Center; R1256/20-CCM 1319) and from all other relevant IRBs and ethics committees. Findings are disseminated through scientific meetings and peer-reviewed journals and via social media. Partners are informed about the study’s course and findings through regular meetings.Trial registration number NCT05339841.
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- 2023
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31. Safety and Effectiveness of Rivaroxaban Versus Warfarin Across GFR Levels in Atrial Fibrillation: A Population-Based Study in Australia and Canada
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Jeffrey T. Ha, Anish Scaria, Jason Andrade, Sunil V. Badve, Peter Birks, Sarah E. Bota, Anna Campain, Ognjenka Djurdjev, Amit X. Garg, Ziv Harel, Brenda Hemmelgarn, Carinna Hockham, Matthew T. James, Meg J. Jardine, Dickson Lam, Adeera Levin, Eric McArthur, Pietro Ravani, Selena Shao, Manish M. Sood, Zhi Tan, Navdeep Tangri, Reid Whitlock, Martin Gallagher, and Min Jun
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Atrial fibrillation ,bleeding ,chronic kidney disease ,death ,direct oral anticoagulant ,eGFR ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Rationale & Objective: The benefit–risk profile of rivaroxaban versus warfarin for atrial fibrillation (AF) in patients with chronic kidney disease is uncertain. We compared rivaroxaban with warfarin across the range of kidney function in adults with AF. Study Design: Multicenter retrospective cohort. Setting & Participants: Adults with AF and a measure of estimated glomerular filtration rate (eGFR); using administrative data from 5 jurisdictions across Australia and Canada (2011-2018). Kidney function was categorized as eGFR ≥60, 45-59, 30-44, and
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- 2023
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32. Coccolithophore Distribution in the Western Black Sea in the Summer of 2016
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Margarita D. Dimiza, Maria V. Triantaphyllou, Alexandra Ravani, Elisa Malinverno, Boris T. Karatsolis, Stella Psarra, and Aristomenis P. Karageorgis
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living coccolithophores ,summer blooms ,species composition ,Biology (General) ,QH301-705.5 - Abstract
Coccolithophores are an important component of phytoplankton abundance and biomass in the brackish environments of the Black Sea. Here, the abundance, composition, and distribution of coccolithophores were investigated in water samples taken from the first 50 m at 18 stations in the western Black Sea during a coccolithophore bloom, in June 2016. The total cell abundances ranged from 2 to 763 × 104 coccospheres L−1; Emiliania huxleyi was the most dominant species, but also Syracosphaera spp. (S. dilatata and S. molischii), Acanthoica (A. acanthifera and A. quattrospina), and Algirosphaera robusta displayed remarkably high concentrations. The formation of the seasonal thermocline significantly affects the vertical distribution of coccolithophores. Emiliania huxleyi, Syracosphaera spp., and Acanthoica spp. were restricted to the upper part of the water column, whereas high abundances of Algirosphaera robusta occurred below the thermocline. Overall, our results show significant differences in the vertical (ANOSIM R = 0.50, p = 0.0001) and spatial (ANOSIM R = 0.18, p = 0.0006) distribution of coccolithophores. Higher abundances of E. huxleyi and Syracosphaera spp. were recorded in the northwestern inner shelf region when compared to the open-sea samples. The observed coccolithophore spatial distribution is suggested to be mostly associated with the influx of less saline river water with high nutrient concentrations.
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- 2023
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33. Indigenous design of a Traffic Light Control system responsive to the local traffic dynamics and priority vehicles
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Bisht, Abhyudai, Ravani, Khilan, Chaturvedi, Manish, Kumar, Naveen, and Tiwari, Shailesh
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- 2022
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34. Bienzymatic Spectrophotometric Method for Uric Acid Estimation in Human Serum and Urine
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Roopa, Ravani Ananda, Mantelingu, Kempegowda, Guin, Mridula, and Thimmaiah, Sridhar Bilgumba
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Uric acid -- Methods ,Backup software -- Methods ,Backup software ,Chemistry - Abstract
In this study, a novel and efficient bienzymatic method for the quantification of uric acid in serum and urine samples was developed. This method is based on the bienzymatic reaction of uricase and peroxidase in the presence of substrates pyrocatechol and 3-methyl-2-benzothiazolinone hydrazone to produce a red colored product. Under optimized conditions, a linearity of uric acid assay was obtained in the ranges of 4 to 384 [micro]M and 2 to 256 [micro]M by kinetic method and fixed time method, respectively. The low limit of detection and limit of quantification were found to be 0.5 and 1.6 [micro]M, respectively. The developed assay was used to quantify uric acid in human serum and urine samples. The present method has good recovery range of 98.3-101.8% and accuracy range of 92.0-101.4%. Hence, the proposed method could be successfully adopted for the quantification of uric acid in clinical laboratories., Author(s): Ravani Ananda Roopa [sup.1], Kempegowda Mantelingu [sup.2], Mridula Guin [sup.3], Sridhar Bilgumba Thimmaiah [sup.4] Author Affiliations: (1) Department of Chemistry, Pooja Bhagavat Memorial Mahajana Education Centre, , 570016, Mysuru, [...]
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- 2022
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35. Progression of Kidney Disease in Kidney Transplant Recipients With a Failing Graft: A Matched Cohort Study
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Ngan N. Lam, Robert R. Quinn, Alix Clarke, Huda Al-Wahsh, Greg A. Knoll, Lee Anne Tibbles, Fareed Kamar, Rachel Jeong, James Kiberd, and Pietro Ravani
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Background: Few studies have assessed outcomes in transplant recipients with failing grafts as most studies have focused on outcomes after graft loss. Objective: To determine whether renal function declines faster in kidney transplant recipients with a failing graft than in people with chronic kidney disease of their native kidneys. Design: Retrospective cohort study. Setting: Alberta, Canada (2002-2019). Patients: We identified kidney transplant recipients with a failing graft (2 estimated glomerular filtration rate [eGFR] measurements 15-30 mL/min/1.73 m 2 ≥90 days apart). Measurements: We compared the change in eGFR over time (eGFR with 95% confidence limits, LCL eGFR UCL ) and the competing risks of kidney failure and death (cause-specific hazard ratios [HRs], LCL HR UCL ). Methods: Recipients (n = 575) were compared with propensity-score-matched, nontransplant controls (n = 575) with a similar degree of kidney dysfunction. Results: The median potential follow-up time was 7.8 years (interquartile range, 3.6-12.1). The hazards for kidney failure (HR 1.10 1.33 1.60 ) and death (HR 1.21 1.59 2.07 ) were significantly higher for recipients, while the eGFR decline over time was similar (recipients vs controls: –2.60 –2.27 –1.94 vs –2.52 –2.21 –1.90 mL/min/1.73 m 2 per year). The rate of eGFR decline was associated with kidney failure but not death. Limitations: This was a retrospective, observational study, and there is a risk of bias due to residual confounding. Conclusions: Although eGFR declines at a similar rate in transplant recipients as in nontransplant controls, recipients have a higher risk of kidney failure and death. Studies are needed to identify preventive measures to improve outcomes in transplant recipients with a failing graft.
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- 2023
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36. Editorial: Lipids and inflammation in health and disease, volume II
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Evgeny Bezsonov, Mirza S. Baig, Michael Bukrinsky, Veronika Myasoedova, Alessio Ravani, Vasily Sukhorukov, Dongwei Zhang, Victoria Khotina, and Alexander Orekhov
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lipids ,inflammation ,atherosclerosis ,LDL ,atherogenicity ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2023
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37. Long-Term Outcomes for Living Kidney Donors With Early Guideline-Concordant Follow-up Care: A Retrospective Cohort Study
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Anisha Dhalla, Anita Lloyd, Krista L. Lentine, Amit X. Garg, Robert R. Quinn, Pietro Ravani, Scott W. Klarenbach, Brenda R. Hemmelgarn, Uchenna Ibelo, and Ngan N. Lam
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Background: Current guidelines recommend that living kidney donors receive lifelong annual follow-up care to monitor kidney health. In the United States, the reporting of complete clinical and laboratory data for kidney donors has been mandated for the first 2 years post-donation; however, the long-term impact of early guideline-concordant care remains unclear. Objective: The primary objective of this study was to compare long-term post-donation follow-up care and clinical outcomes of living kidney donors with and without early guideline-concordant follow-up care. Design: Retrospective, population-based cohort study. Setting: Linked health care databases were used to identify kidney donors in Alberta, Canada. Patients: Four hundred sixty living kidney donors who underwent nephrectomy between 2002 and 2013. Measurements: The primary outcome was continued annual follow-up at 5 and 10 years (adjusted odds ratio with 95% confidence interval, LCL aOR UCL ). Secondary outcomes included mean change in estimated glomerular filtration rate (eGFR) over time and rates of all-cause hospitalization. Methods: We compared long-term follow-up and clinical outcomes for donors with and without early guideline-concordant care, defined as annual physician visit and serum creatinine and albuminuria measurement for the first 2 years post-donation. Results: Of the 460 donors included in this study, 187 (41%) had clinical and laboratory evidence of guideline-concordant follow-up care throughout the first 2 years post-donation. The odds of receiving annual follow-up for donors without early guideline-concordant care were 76% lower at 5 years (aOR 0.18 0.24 0.32 ) and 68% lower at 10 years (aOR 0.23 0.32 0.46 ) compared with donors with early care. The odds of continuing follow-up remained stable over time for both groups. Early guideline-concordant follow-up care did not appear to substantially influence eGFR or hospitalization rates over the longer term. Limitations: We were unable to confirm whether the lack of physician visits or laboratory data in certain donors was due to physician or patient decisions. Conclusions: Although policies directed toward improving early donor follow-up may encourage continued follow-up, additional strategies may be necessary to mitigate long-term donor risks.
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- 2023
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38. Development and External Validation of a Machine Learning Model for Progression of CKD
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Ferguson, Thomas, Ravani, Pietro, Sood, Manish M., Clarke, Alix, Komenda, Paul, Rigatto, Claudio, and Tangri, Navdeep
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- 2022
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39. WCN24-2729 Predicting the risks of kidney failure and death in adults with moderate-tosevere chronic kidney disease (KDpredict)
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Ravani, Pietro, primary, Sawhney, Simon, additional, Quinn, Robert, additional, Heide-Jørgensen, Uffe, additional, Jensen, Simon, additional, Mclean, Andrew, additional, Christiansen, Christian, additional, Gerds, Thomas, additional, and Liu, Ping, additional
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- 2024
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40. Determinants of Carotid Wall Echolucency in a Cohort of European High Cardiovascular Risk Subjects: A Cross-Sectional Analysis of IMPROVE Baseline Data
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Frigerio, Beatrice, primary, Coggi, Daniela, additional, Bonomi, Alice, additional, Amato, Mauro, additional, Capra, Nicolò, additional, Colombo, Gualtiero I., additional, Sansaro, Daniela, additional, Ravani, Alessio, additional, Savonen, Kai, additional, Giral, Philippe, additional, Gallo, Antonio, additional, Pirro, Matteo, additional, Gigante, Bruna, additional, Eriksson, Per, additional, Strawbridge, Rona J., additional, Mulder, Douwe J., additional, Tremoli, Elena, additional, Veglia, Fabrizio, additional, and Baldassarre, Damiano, additional
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- 2024
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41. Involving Patient Partners in the KRESCENT Peer Review: Intent, Process, Challenges, and Opportunities
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Elisabeth A. Fowler, Karin Bell, Kevin Burns, Angela Chiazzese, Sacha A. DeSerres, Bethany J. Foster, Sunny Hartwig, Gwen Herrington, Matthew T. James, Victor Jensen, Nina Jones, Sandi Kidston, Serge Lemay, Adeera Levin, Anne MacPhee, Shanda McCutcheon, Pietro Ravani, Susan Samuel, James Scholey, Tomoko Takano, Navdeep Tangri, Nancy Verdin, R. Todd Alexander, and Catherine M. Clase
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Purpose of review: The Kidney Research Scientist Core Education and National Training (KRESCENT) is a national Canadian training program for kidney scientists, funded by the Kidney Foundation of Canada (KFOC), the Canadian Institutes of Health Research (CIHR), and the Canadian Society of Nephrology (CSN). We describe our first year of incorporating patient partners into a scientific peer-review committee, the 2017 committee to select senior research trainees and early-career kidney researchers for funding and training, in the hope that it will be helpful to others who wish to integrate the perspective of people with lived experience into the peer-review process. Sources of information: Other peer-review committees, websites, journal articles, patient partners, Kidney Foundation of Canada Research Council, Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD) Patient Council, participants in the 2017 Kidney Foundation of Canada KRESCENT peer-review panel. Methods: We describe our motivation, rationale, guiding principles, plans, feedback, implementation, and response. Key findings: We disseminated a “call for patient partners” 8 weeks before the meeting, seeking patients or their care givers to partner with the KRESCENT peer-review panel; we defined these people with lived experience of kidney disease as patient partners. Eight patient partners came forward and all participated as reviewers. Patient partners first participated in a webinar to learn about the function, structure, and processes of a peer-review committee. They practiced reviewing plain language summaries and giving feedback. In a subsequent teleconference, they shared and discussed their reviews. Plain language summaries were scored, overall, on the same 0-5 quality scale used by scientific reviewers. Three patient reviewers participated in some or all of the 6-hour meeting, which was conducted as usual, for this panel, by teleconference (initially audio only; from 2020 onwards by videoconference). In the meeting, the 2 assigned scientific reviewers first gave their scores, followed by the patient reviewers giving their scores, and discussion (mostly scientific, and conducted in usual scientific language). Scientific reviewers then negotiated a consensus score based on their initial scores, the discussion, patient reviewers’ scores and statements, and the scientific officer’s notes. Patient reviewers, scientific reviewers, and the Kidney Foundation of Canada (KFOC) were generally positive about the process. The increased length of the meeting (estimated at 1 hour) was generally thought to be acceptable. Patient reviewers also provided feedback on the methods used to incorporate patients into the research under review. These comments were concrete, insightful, and helpful. The patients did not uniformly recommend that basic scientists involve patients in their work. We did not detect bias against preclinical science, work that did not involve patients, or rarer diseases. Some patients found participation inspiring and enlightening. All participants appreciated the idea of patient partners as community witnesses to a group process committed to fairness and supportiveness. We discussed assigning formal meaningful weight to patient reviewers’ assessments. Most, but not all, patients thought that the scientific reviewers were ultimately the best judges of the allocation of scarce research resources. Limitations: Patient participants tended to be Caucasian, middle class, and well educated. Because of the difficulties of travel for some people living with or supporting those living with kidney disease, our findings may not generalize fully to peer-review meetings that are conducted face to face. This is explicitly a supportive panel, committed to reviewing junior scientists with kindness as well as rigor; our findings may not generalize to panels conducted differently. We did not use formal qualitative methodology. Implications: Inclusion of patient partners as patient reviewers for the KRESCENT program peer-review panel was feasible, added value for scientific and patient reviewers, and for the funding stakeholders (CIHR, KFOC, and CSN). We were glad that we had taken this step and continue to refine the process with each successive competition.
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- 2022
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42. Global variations in funding and use of hemodialysis accesses: an international report using the ISN Global Kidney Health Atlas
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Global Health team 1, Ghimire, Anukul, Shah, Samveg, Chauhan, Utkarsh, Ibrahim, Kwaifa Salihu, Jindal, Kailash, Kazancioglu, Rumeyza, Luyckx, Valerie A., MacRae, Jennifer M., Olanrewaju, Timothy O., Quinn, Robert R., Ravani, Pietro, Shah, Nikhil, Thompson, Stephanie, Tungsanga, Somkanya, Vachharanjani, Tushar, Arruebo, Silvia, Caskey, Fergus J., Damster, Sandrine, Donner, Jo Ann, Jha, Vivekanand, Levin, Adeera, Malik, Charu, Nangaku, Masaomi, Saad, Syed, Tonelli, Marcello, Ye, Feng, Okpechi, Ikechi G., Bello, Aminu K., Johnson, David W., Global Health team 1, Ghimire, Anukul, Shah, Samveg, Chauhan, Utkarsh, Ibrahim, Kwaifa Salihu, Jindal, Kailash, Kazancioglu, Rumeyza, Luyckx, Valerie A., MacRae, Jennifer M., Olanrewaju, Timothy O., Quinn, Robert R., Ravani, Pietro, Shah, Nikhil, Thompson, Stephanie, Tungsanga, Somkanya, Vachharanjani, Tushar, Arruebo, Silvia, Caskey, Fergus J., Damster, Sandrine, Donner, Jo Ann, Jha, Vivekanand, Levin, Adeera, Malik, Charu, Nangaku, Masaomi, Saad, Syed, Tonelli, Marcello, Ye, Feng, Okpechi, Ikechi G., Bello, Aminu K., and Johnson, David W.
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- 2024
43. RGBD Camera Pose Estimation Techniques, Slip Detection, and Occluded Object Search Strategies for Deformable Linear Object Features in Autonomous Robotic Space Task Execution
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Hwang, Lawrence Jason, Ravani, Bahram1, Hwang, Lawrence Jason, Hwang, Lawrence Jason, Ravani, Bahram1, and Hwang, Lawrence Jason
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This thesis studies Robotic handling of Deformable Linear Objects (DLO). Many habitats used for space exploration include panels with multiple wires and connections which can be easily reconfigured by humans but very difficult to be handled autonomously by robotic systems due to the flexible nature of the wires. In some situations, the wires can come loose and get separated from their connections resulting in malfunctioning of some onboard systems. This thesis develops methods for autonomous handling of flexible wires (deformable linear objects) involving the unplugging and re-plugging or stowing of one end of the wire from a connection point. An anomaly situation may arise when the end of a gripped DLO slips away from the robotic end effector into the environment while being maneuvered, entering the object into anunknown state. The objective of the research presented herein was to use purely visual sensing to detect this DLO slip locating the loose connector end, estimating its pose, and autonomously developing a motion plan for retrieval and delivery of the connector end to its originally intended destination. Three pose estimation methods are implemented: employing fiducial markers, RGBD image processing, and machine learning algorithms to generate the pose of the end of the DLO being manipulated. Experiments are performed using two cooperating robotic arms that show identification rates of 48.1%, 100.0%, and 77.8% and arm retrieval grasp rates of 48.1%, 74.1%, and 64.0% respectively among 27 trials. The identification rate varied based on the level of occlusion of the DLO end within the workspace. Slip detection is accomplished by comparing this estimated position’s distance to the manipulating arm’s end effector against a threshold quantifying a slip, producing a success rate of 77.2% from 18 slip trials. In the event that the loose connector settles out of the camera’s view, a spiral search pattern was designed to maneuver the secondary camera for further work
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- 2024
44. Global variability of vascular and peritoneal access for chronic dialysis
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Ghimire, Anukul; https://orcid.org/0000-0001-9165-4920, Shah, Samveg, Okpechi, Ikechi G; https://orcid.org/0000-0002-6545-9715, Ye, Feng, Tungsanga, Somkanya, Vachharajani, Tushar; https://orcid.org/0000-0002-4494-966X, Levin, Adeera, Johnson, David, Ravani, Pietro, Tonelli, Marcello, Thompson, Stephanie, Jha, Vivekananda, Luyckx, Valerie; https://orcid.org/0000-0001-7066-8135, Jindal, Kailash, Shah, Nikhil, Caskey, Fergus J, Kazancioglu, Rumeyza, Bello, Aminu K, Ghimire, Anukul; https://orcid.org/0000-0001-9165-4920, Shah, Samveg, Okpechi, Ikechi G; https://orcid.org/0000-0002-6545-9715, Ye, Feng, Tungsanga, Somkanya, Vachharajani, Tushar; https://orcid.org/0000-0002-4494-966X, Levin, Adeera, Johnson, David, Ravani, Pietro, Tonelli, Marcello, Thompson, Stephanie, Jha, Vivekananda, Luyckx, Valerie; https://orcid.org/0000-0001-7066-8135, Jindal, Kailash, Shah, Nikhil, Caskey, Fergus J, Kazancioglu, Rumeyza, and Bello, Aminu K
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AIM: Vascular and peritoneal access are essential elements for sustainability of chronic dialysis programs. Data on availability, patterns of use, funding models, and workforce for vascular and peritoneal accesses for dialysis at a global scale is limited. METHODS: An electronic survey of national leaders of nephrology societies, consumer representative organizations, and policymakers was conducted from July to September 2018. Questions focused on types of accesses used to initiate dialysis, funding for services, and availability of providers for access creation. RESULTS: Data from 167 countries were available. In 31 countries (25% of surveyed countries), >75% of patients initiated haemodialysis (HD) with a temporary catheter. Seven countries (5% of surveyed countries) had >75% of patients initiating HD with arteriovenous fistulas or grafts. Seven countries (5% of surveyed countries) had >75% of their patients starting HD with tunnelled dialysis catheters. 57% of low-income countries (LICs) had >75% of their patients initiating HD with a temporary catheter compared to 5% of high-income countries (HICs). Shortages of surgeons to create vascular access were reported in 91% of LIC compared to 46% in HIC. Approximately 95% of participating countries in the LIC category reported shortages of surgeons for peritoneal dialysis (PD) access compared to 26% in HIC. Public funding was available for central venous catheters, fistula/graft creation, and PD catheter surgery in 57%, 54% and 54% of countries, respectively. CONCLUSION: There is a substantial variation in the availability, funding, workforce, and utilization of vascular and peritoneal access for dialysis across countries regions, with major gaps in low-income countries.
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- 2024
45. Predicting the risks of kidney failure and death in adults with moderate to severe chronic kidney disease
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Gerds, Thomas Alexander, Ravani, Pietro, Gerds, Thomas Alexander, and Ravani, Pietro
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The risk prediction model for kidney failure and death in people with chronic kidney disease (CKD) presented in the linked study is a super learner. A super learner is an algorithm that repeatedly splits the data into training and test sets and then chooses the best performing model from a list of candidate prediction models. This article describes why and how the super learner was implemented in the linked study.
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- 2024
46. Predicting the risks of kidney failure and death in adults with moderate to severe chronic kidney disease:multinational, longitudinal, population based, cohort study
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Liu, Ping, Sawhney, Simon, Heide-Jørgensen, Uffe, Quinn, Robert Ross, Jensen, Simon Kok, McLean, Andrew, Christiansen, Christian Fynbo, Gerds, Thomas Alexander, Ravani, Pietro, Liu, Ping, Sawhney, Simon, Heide-Jørgensen, Uffe, Quinn, Robert Ross, Jensen, Simon Kok, McLean, Andrew, Christiansen, Christian Fynbo, Gerds, Thomas Alexander, and Ravani, Pietro
- Abstract
Objective To train and test a super learner strategy for risk prediction of kidney failure and mortality in people with incident moderate to severe chronic kidney disease (stage G3b to G4). Design Multinational, longitudinal, population based, cohort study. Settings Linked population health data from Canada (training and temporal testing), and Denmark and Scotland (geographical testing). Participants People with newly recorded chronic kidney disease at stage G3b-G4, estimated glomerular filtration rate (eGFR) 15-44 mL/min/1.73 m2. Modelling The super learner algorithm selected the best performing regression models or machine learning algorithms (learners) based on their ability to predict kidney failure and mortality with minimised cross-validated prediction error (Brier score, the lower the better). Prespecified learners included age, sex, eGFR, albuminuria, with or without diabetes, and cardiovascular disease. The index of prediction accuracy, a measure of calibration and discrimination calculated from the Brier score (the higher the better) was used to compare KDpredict with the benchmark, kidney failure risk equation, which does not account for the competing risk of death, and to evaluate the performance of KDpredict mortality models. Results 67 942 Canadians, 17 528 Danish, and 7740 Scottish residents with chronic kidney disease at stage G3b to G4 were included (median age 77-80 years; median eGFR 39 mL/min/1.73 m2). Median follow-up times were five to six years in all cohorts. Rates were 0.8-1.1 per 100 person years for kidney failure and 10-12 per 100 person years for death. KDpredict was more accurate than kidney failure risk equation in prediction of kidney failure risk: five year index of prediction accuracy 27.8% (95% confidence interval 25.2% to 30.6%) versus 18.1% (15.7% to 20.4%) in Denmark and 30.5% (27.8% to 33.5%) versus 14.2% (12.0% to 16.5%) in Scotland. Predictions from kidney failure risk equation and, Objective: To train and test a super learner strategy for risk prediction of kidney failure and mortality in people with incident moderate to severe chronic kidney disease (stage G3b to G4). Design: Multinational, longitudinal, population based, cohort study. Settings: Linked population health data from Canada (training and temporal testing), and Denmark and Scotland (geographical testing). Participants: People with newly recorded chronic kidney disease at stage G3b-G4, estimated glomerular filtration rate (eGFR) 15-44 mL/min/1.73 m2. Modelling: The super learner algorithm selected the best performing regression models or machine learning algorithms (learners) based on their ability to predict kidney failure and mortality with minimised cross-validated prediction error (Brier score, the lower the better). Prespecified learners included age, sex, eGFR, albuminuria, with or without diabetes, and cardiovascular disease. The index of prediction accuracy, a measure of calibration and discrimination calculated from the Brier score (the higher the better) was used to compare KDpredict with the benchmark, kidney failure risk equation, which does not account for the competing risk of death, and to evaluate the performance of KDpredict mortality models. Results: 67 942 Canadians, 17 528 Danish, and 7740 Scottish residents with chronic kidney disease at stage G3b to G4 were included (median age 77-80 years; median eGFR 39 mL/min/1.73 m2). Median follow-up times were five to six years in all cohorts. Rates were 0.8-1.1 per 100 person years for kidney failure and 10-12 per 100 person years for death. KDpredict was more accurate than kidney failure risk equation in prediction of kidney failure risk: five year index of prediction accuracy 27.8% (95% confidence interval 25.2% to 30.6%) versus 18.1% (15.7% to 20.4%) in Denmark and 30.5% (27.8% to 33.5%) versus 14.2% (12.0% to 16.5%) in Scotland. Predictions from kidney failure risk equation and KDpredict dif
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- 2024
47. Abstract 14031: Sacubitril-Valsartan Effects on Atherosclerotic Outcomes: A Meta-Analysis of Randomized Trials
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CARVALHO, LIS VICTORIA RAVANI, Abi-Kair Borges Calomeni, Pedro, de Miranda Gauza, Mateus, Pereira, Jussara, and Cardoso, Rhanderson
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- 2022
- Full Text
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48. Abstract 12571: Optimal Rate Control Strategy in Patients With Atrial Fibrillation: A Meta-Analysis of Randomized Trials and Multivariable Adjusted Studies
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Abi-Kair Borges Calomeni, Pedro, CARVALHO, LIS VICTORIA RAVANI, de Miranda Gauza, Mateus, Pereira, Jussara, and Cardoso, Rhanderson
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- 2022
- Full Text
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49. A Study on Socio Demographic, Clinical Profile and Outcome of Breast Cancer Patients attending Tertiary Cancer Care centre in Gujarat State
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Anand Shah, Ravi Patel, Jayesh Solanki, and Vaishali Ravani
- Subjects
breast cancer ,clinical profile ,sociodemographic profile ,Medicine ,Public aspects of medicine ,RA1-1270 - Abstract
Introduction: Breast cancer is second most common cancer all over the world. Majority of breast cancer cases are registered to hospital at a later stage of cancer presentation. Objective: To study socio-demographic, clinical presentation and outcome of Breast cancer patients attending tertiary care centre of Gujarat state. Method: This was a retrospective study made up of 5774 patients registered in tertiary care centre of Gujarat state. Data including patient’s socio-demographic information like age, marital status, education level and clinical diagnosis including clinical presentation at time of registration, treatment history etc was collected. The data was analysed using MS office 2010 and Epi Info software version 7.0. Result: The age ranged between 17-99 years, with a median of 50 years and interquartile range of 42-58 years. There were 62.07% patients presented with locally advanced breast cancer, while 17.57% patients had distant metastasis at diagnosis. Significant association (p
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- 2021
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50. The Positive Impact of Early Frailty Levels on Mortality in Elderly Patients with Severe Aortic Stenosis Undergoing Transcatheter/Surgical Aortic Valve Replacement
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Annamaria Mazzone, Serena Del Turco, Giuseppe Trianni, Paola Quadrelli, Marco Marotta, Luca Bastiani, Tommaso Gasbarri, Andreina D’Agostino, Massimiliano Mariani, Giuseppina Basta, Ilenia Foffa, Silverio Sbrana, Cristina Vassalle, Marcello Ravani, Marco Solinas, and Sergio Berti
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aortic stenosis ,pre-frailty ,frailty ,transcatheter aortic valve replacement ,mortality ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: Frailty is highly common in older patients (pts) undergoing transcatheter aortic valve replacement (TAVR), and it is associated with poor outcomes. The selection of patients who can benefit from this procedure is necessary and challenging. The aim of the present study is to evaluate outcomes in older severe aortic valve stenosis (AS) pts, selected by a multidisciplinary approach for surgical, clinical, and geriatric risk and referred to treatment, according to frailty levels. Methods: A total of 109 pts (83 ± 5 years; females, 68%) with AS were classified by Fried’s score in pre-frail, early frail, and frail and underwent surgical aortic valve replacement SAVR/TAVR, balloon aortic valvuloplasty, or medical therapy. We evaluated geriatric, clinical, and surgical features and detected periprocedural complications. The outcome was all-cause mortality. Results: Increasing frailty was associated with the worst clinical, surgical, geriatric conditions. By using Kaplan–Meier analysis, the survival rate was higher in pre-frail and TAVR groups (p < 0.001) (median follow-up = 20 months). By using the Cox regression model, frailty (p = 0.004), heart failure (p = 0.007), EF% (p = 0.043), albumin (p = 0.018) were associated with all-cause mortality. Conclusions: According to tailored frailty management, elderly AS pts with early frailty levels seem to be the most suitable candidates for TAVR/SAVR for positive outcomes because advanced frailty would make each treatment futile or palliative.
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- 2023
- Full Text
- View/download PDF
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