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Jesrani AK, Faiq SM, Rashid R, Kalwar TA, Mohsin R, Aziz T, Khan NA, Mubarak M. Comparison of resistive index and shear-wave elastography in the evaluation of chronic kidney allograft dysfunction. World J Transplant 2024; 14:89255. [PMID: 38576755 PMCID: PMC10989465 DOI: 10.5500/wjt.v14.i1.89255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/18/2024] [Accepted: 02/27/2024] [Indexed: 03/15/2024] Open
Abstract
BACKGROUND Detection of early chronic changes in the kidney allograft is important for timely intervention and long-term survival. Conventional and novel ultrasound-based investigations are being increasingly used for this purpose with variable results. AIM To compare the diagnostic performance of resistive index (RI) and shear wave elastography (SWE) in the diagnosis of chronic fibrosing changes of kidney allograft with histopathological results. METHODS This is a cross-sectional and comparative study. A total of 154 kidney transplant recipients were included in this study, which was conducted at the Departments of Transplantation and Radiology, Sindh Institute of Urology and Transplan tation, Karachi, Pakistan, from August 2022 to February 2023. All consecutive patients with increased serum creatinine levels and reduced glomerular filtration rate (GFR) after three months of transplantation were enrolled in this study. SWE and RI were performed and the findings of these were evaluated against the kidney allograft biopsy results to determine their diagnostic utility. RESULTS The mean age of all patients was 35.32 ± 11.08 years. Among these, 126 (81.8%) were males and 28 (18.2%) were females. The mean serum creatinine in all patients was 2.86 ± 1.68 mg/dL and the mean estimated GFR was 35.38 ± 17.27 mL/min/1.73 m2. Kidney allograft biopsy results showed chronic changes in 55 (37.66%) biopsies. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of SWE for the detection of chronic allograft damage were 93.10%, 96.87%%, 94.73%, and 95.87%, respectively, and the diagnostic accuracy was 95.45%. For RI, the sensitivity, specificity, PPV, and NPV were 76.92%, 83.33%, 70.17%, and 87.62%, respectively, and the diagnostic accuracy was 81.16%. CONCLUSION The results from this study show that SWE is more sensitive and specific as compared to RI in the evaluation of chronic allograft damage. It can be of great help during the routine follow-up of kidney transplant recipients for screening and early detection of chronic changes and selecting patients for allograft biopsy.
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Affiliation(s)
- Ameet Kumar Jesrani
- Department of Radiology, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Syed M Faiq
- Department of Radiology, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Rahma Rashid
- Department of Pathology, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Tariq Ali Kalwar
- Department of Transplantation, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Rehan Mohsin
- Department of Urology, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Tahir Aziz
- Department of Transplantation, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Nida Amin Khan
- Department of Radiology, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
| | - Muhammed Mubarak
- Department of Pathology, Sindh Institute of Urology and Transplantation, Karachi 74200, Sindh, Pakistan
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Gerken ALH, Keese M, Weiss C, Krücken HS, Pecher KAP, Ministro A, Rahbari NN, Reissfelder C, Rother U, Yazdani B, Kälsch AI, Krämer BK, Schwenke K. Investigation of Different Methods of Intraoperative Graft Perfusion Assessment during Kidney Transplantation for the Prediction of Delayed Graft Function: A Prospective Pilot Trial. J Pers Med 2022; 12:jpm12101749. [PMID: 36294888 PMCID: PMC9605219 DOI: 10.3390/jpm12101749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/13/2022] [Accepted: 10/17/2022] [Indexed: 11/09/2022] Open
Abstract
Delayed graft function (DGF) after renal transplantation is a relevant clinical problem affecting long-term organ function. The early detection of patients at risk is crucial for postoperative monitoring and treatment algorithms. In this prospective cohort study, allograft perfusion was evaluated intraoperatively in 26 kidney recipients by visual and formal perfusion assessment, duplex sonography, and quantitative microperfusion assessment using O2C spectrometry and ICG fluorescence angiography. The O2C tissue spectrometry device provides a quantitative method of microperfusion assessment that can be employed during kidney transplantation as an easy-to-use and highly sensitive alternative to ICG fluorescence angiography. Intraoperative microvascular flow and velocity in the allograft cortex after reperfusion predicted DGF with a sensitivity of 100% and a specificity of 82%. Threshold values of 57 A.U. for microvascular flow and 13 A.U. for microvascular velocity were identified by an ROC analysis. This study, therefore, confirmed that impairment of microperfusion of the allograft cortex directly after reperfusion was a key indicator for the occurrence of DGF after kidney transplantation. Our results support the combined use of intraoperative duplex sonography, for macrovascular quality control, and quantitative microperfusion assessment, such as O2C spectrometry, for individual risk stratification to guide subsequent postoperative management.
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Affiliation(s)
- Andreas L. H. Gerken
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
- Correspondence: ; Tel.: +49-(0)621-383-2225
| | - Michael Keese
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
- European Center for Angioscience, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Straße 13-17, D-68167 Mannheim, Germany
| | - Christel Weiss
- Department of Biometry and Statistics, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Hanna-Sophie Krücken
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Katarina A. P. Pecher
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
- Lisbon Academic Medical Centre, 1649-035 Lisbon, Portugal
| | - Augusto Ministro
- Lisbon Academic Medical Centre, 1649-035 Lisbon, Portugal
- Vascular Surgery, Heart and Vessels Department, Hospital Santa Maria (CHULN), 1649-035 Lisbon, Portugal
- Faculty of Medicine, University of Lisbon, 1300-477 Lisbon, Portugal
| | - Nuh N. Rahbari
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Christoph Reissfelder
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Ulrich Rother
- Department of Vascular Surgery, Friedrich Alexander University Erlangen-Nuremberg, Krankenhausstraße 12, D-91054 Erlangen, Germany
| | - Babak Yazdani
- Department of Medicine V, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Anna-Isabelle Kälsch
- Department of Medicine V, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Bernhard K. Krämer
- European Center for Angioscience, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Straße 13-17, D-68167 Mannheim, Germany
- Department of Medicine V, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
- Center for Innate Immunoscience, Medical Faculty Mannheim, Heidelberg University, Ludolf-Krehl-Straße 13-17, D-68167 Mannheim, Germany
| | - Kay Schwenke
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
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Gonçalves LM, Forte GC, Holz TG, Libermann LL, Figueiredo CEPD, Hochhegger B. Shear wave elastography and Doppler ultrasound in kidney transplant recipients. Radiol Bras 2022; 55:19-23. [PMID: 35210660 PMCID: PMC8864684 DOI: 10.1590/0100-3984.2020.0148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 03/23/2021] [Indexed: 11/21/2022] Open
Abstract
Objective To evaluate the association between shear wave elastography parameters and arterial
resistance in kidney transplant recipients. Materials and Methods This was a prospective cross-sectional study involving consecutive adult kidney transplant
recipients. All patients underwent color Doppler to evaluate the resistive index (RI) and
ultrasound shear wave elastography for the quantification of renal allograft stiffness. Results We evaluated 55 patients, of whom 9 (16.4%) had an RI defined as abnormal (≥ 0.79)
and 46 (83.6%) had an RI defined as normal (< 0.79). The mean age was higher in the
abnormal RI group than in the normal RI group (68.0 ± 8.6 years vs. 42.6 ± 14.1
years; p < 0.001), as was the mean shear wave velocity (2.6 ± 0.4
m/s vs. 2.2 ± 0.4 m/s; p = 0.013). Multivariate analysis identified
two independent predictors of arterial resistance: age (OR = 1.169; 95% CI: 1.056 to 1.294;
p = 0.003) and shear wave velocity (OR = 17.1; 95% CI: 1.137 to 257.83;
p = 0.040). Conclusion We observed an association between rigidity in the cortex of the transplanted kidney, as
evaluated by shear wave elastography, and arterial resistance, as evaluated by color Doppler,
in kidney transplant recipients.
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Affiliation(s)
| | | | - Tiago Garcia Holz
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Brazil
| | | | | | - Bruno Hochhegger
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Brazil
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Assessing Kidney Graft Viability and Its Cells Metabolism during Machine Perfusion. Int J Mol Sci 2021; 22:ijms22031121. [PMID: 33498732 PMCID: PMC7865666 DOI: 10.3390/ijms22031121] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/13/2021] [Accepted: 01/21/2021] [Indexed: 12/16/2022] Open
Abstract
Kidney transplantation is the golden treatment for end-stage renal disease. Static cold storage is currently considered the standard method of preservation, but dynamic techniques, such as machine perfusion (MP), have been shown to improve graft function, especially in kidneys donated by extended criteria donors and donation after circulatory death. With poor organ quality being a major reason for kidneys not being transplanted, an accurate, objective and reliable quality assessment during preservation could add value and support to clinicians’ decisions. MPs are emerging technologies with the potential to assess kidney graft viability and quality, both in the hypothermic and normothermic scenarios. The aim of this review is to summarize current tools for graft viability assessment using MP prior to implantation in relation to the ischemic damage.
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Prudhomme T, Kervella D, Le Bas-Bernardet S, Cantarovich D, Karam G, Blancho G, Branchereau J. Ex situ Perfusion of Pancreas for Whole-Organ Transplantation: Is it Safe and Feasible? A Systematic Review. J Diabetes Sci Technol 2020; 14:120-134. [PMID: 31409133 PMCID: PMC7189158 DOI: 10.1177/1932296819869312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Pancreas transplantation is currently one of the best treatments proposed in highly selected patients with unstable and brittle type 1 diabetes. The objective of pancreas transplantation is to restore normoglycemia and avoid the occurrence of complications associated with diabetes. Graft pancreatitis and thrombosis, arising from ischemia reperfusion injuries, are major causes of graft loss in the postoperative period. Ex situ perfusion, in hypothermic or normothermic settings, allowed to improve ischemic reperfusion injury in other organ transplantations (kidney, liver, or lung). The development of pancreatic graft perfusion techniques would limit these ischemic reperfusion injuries. OBJECTIVE Evaluation of the safety and feasibility of ex situ perfusion of pancreas for whole-organ transplantation. METHODS English literature about pancreas perfusion was analyzed using electronic database Medline via PubMed (1950-2018). Exclusion criteria were studies that did not specify the technical aspects of machine perfusion and studies focused only on pancreas perfusion for islet isolation. RESULTS Hypothermic machine perfusion for pancreas preservation has been evaluated in nine studies and normothermic machine perfusion in ten studies. We evaluated machine perfusion model, types of experimental model, anatomy, perfusion parameters, flushing and perfusion solution, length of perfusion, and comparison between static cold storage and perfusion. CONCLUSIONS This review compared ex vivo machine perfusion of experimental pancreas for whole-organ transplantation. Pancreas perfusion is feasible and could be a helpful tool to evaluate pancreas prior to transplantation. Pancreas perfusion (in hypothermic or normothermic settings) could reduce ischemic reperfusion injuries, and maybe could avoid pancreas thrombosis and reduce morbidity of pancreas transplantation.
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Affiliation(s)
- Thomas Prudhomme
- Centre de Recherche en Transplantation
et Immunologie UMR 1064, INSERM, Université de Nantes, France
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
| | - Delphine Kervella
- Centre de Recherche en Transplantation
et Immunologie UMR 1064, INSERM, Université de Nantes, France
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
| | - Stéphanie Le Bas-Bernardet
- Centre de Recherche en Transplantation
et Immunologie UMR 1064, INSERM, Université de Nantes, France
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
| | - Diego Cantarovich
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
| | - Georges Karam
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
| | - Gilles Blancho
- Centre de Recherche en Transplantation
et Immunologie UMR 1064, INSERM, Université de Nantes, France
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
| | - Julien Branchereau
- Centre de Recherche en Transplantation
et Immunologie UMR 1064, INSERM, Université de Nantes, France
- Institut de Transplantation Urologie
Néphrologie (ITUN), CHU Nantes, France
- Julien Branchereau, Centre de Recherche en
Transplantation et Immunologie UMR 1064, INSERM, 30 Bd Jean Monnet, Nantes
44035, France.
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Rother U, Amann K, Adler W, Nawroth N, Karampinis I, Keese M, Manap S, Regus S, Meyer A, Porubsky S, Hilgers K, Krämer BK, Lang W, Nowak K, Gerken ALH. Quantitative assessment of microperfusion by indocyanine green angiography in kidney transplantation resembles chronic morphological changes in kidney specimens. Microcirculation 2019; 26:e12529. [PMID: 30656790 DOI: 10.1111/micc.12529] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/12/2018] [Accepted: 01/04/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVE ICG fluorescence angiography enables a quantitative real-time perfusion assessment in kidney transplantation. The results of intraoperative microperfusion of the kidney allograft were compared to the renal chronicity score in pre-transplantation kidney biopsy specimens. The intrarenal resistance index was calculated by duplex sonography as a method of reference. METHODS Seventy-seven patients with end-stage renal disease undergoing kidney transplantation were prospectively included in two centers. Correlation analysis of chronic changes in kidney biopsy specimens and the IN of ICG fluorescence signal were investigated. RESULTS The results yielded a significantly negative correlation for the renal chronicity (r = -0.294, P = 0.017) as well as the intestinal fibrosis and tubular atrophy score (r = -0.328, P = 0.007). There was a significant inverse relationship between the IN and the mean RI values of the upper pole of the kidney allograft. CONCLUSIONS In summary, fluorescence angiography reflects preexisting morphological changes of the renal cortex. ICG angiography may serve as an alternative method for the assessment of microperfusion of the kidney allograft.
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Affiliation(s)
- Ulrich Rother
- Department of Vascular Surgery, University of Erlangen, Erlangen, Germany
| | - Kerstin Amann
- Department of Nephropathology, University of Erlangen, Erlangen, Germany
| | - Werner Adler
- Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen-Nuernberg FAU, Erlangen, Germany
| | - Nina Nawroth
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Ioannis Karampinis
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Michael Keese
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Serhat Manap
- Department of Vascular Surgery, University of Erlangen, Erlangen, Germany
| | - Susanne Regus
- Department of Vascular Surgery, University of Erlangen, Erlangen, Germany
| | - Alexander Meyer
- Department of Vascular Surgery, University of Erlangen, Erlangen, Germany
| | - Stefan Porubsky
- Department of Pathology, University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Karl Hilgers
- Department of Nephrology, University of Erlangen, Erlangen, Germany
| | - Bernhard K Krämer
- Department of Medicine V, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Werner Lang
- Department of Vascular Surgery, University of Erlangen, Erlangen, Germany
| | - Kai Nowak
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Andreas L H Gerken
- Department of Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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Role of temperature in reconditioning and evaluation of cold preserved kidney and liver grafts. Curr Opin Organ Transplant 2017; 22:267-273. [PMID: 28266940 PMCID: PMC5617555 DOI: 10.1097/mot.0000000000000402] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Purpose of review Organ shortage in transplantation medicine forces surgical research toward the development of more efficient approaches in organ preservation to enable the application of ‘less than optimal’ grafts. This review summarizes current techniques aiming to recondition cold-stored organ grafts prior to transplantation to reduce reperfusion-induced tissue injury and improve postimplantation graft function. Recent findings End-ischemic reconditioning has classically been attempted by cold oxygenated perfusion. By contrast, evaluation of graft performance prior to transplantation might be facilitated by perfusion at higher temperatures, ideally at normothermia. A drastic temperature shift from cold preservation to warm perfusion, however, has been incriminated to trigger a so-called rewarming injury associated with mitochondrial alterations. A controlled gradual warming up during machine perfusion could enhance the restitution of cellular homeostasis and improve functional outcome upon warm reperfusion. Summary Machine perfusion after conventional cold storage is beneficial for ulterior function after transplantation. Cold grafts should be initially perfused at low temperatures allowing for restitution of cellular homeostasis under protective hypothermic limitation of metabolic turnover. Delayed slow rewarming of the organ might further mitigate rewarming injury upon reperfusion and also increases the predictive power of evaluative measures, taken during pretransplant perfusion.
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Abstract
The old-for-old allocation policy used for kidney transplantation (KT) has confirmed the survival benefit compared to remaining listed on dialysis. Shortage of standard donors has stimulated the development of strategies aimed to expand acceptance criteria, particularly of kidneys from elderly donors. We have systematically reviewed the literature on those different strategies. In addition to the review of outcomes of expanded criteria donor or advanced age kidneys, we assessed the value of the Kidney Donor Profile Index policy, preimplantation biopsy, dual KT, machine perfusion and special immunosuppressive protocols. Survival and functional outcomes achieved with expanded criteria donor, high Kidney Donor Profile Index or advanced age kidneys are poorer than those with standard ones. Outcomes using advanced age brain-dead or cardiac-dead donor kidneys are similar. Preimplantation biopsies and related scores have been useful to predict function, but their applicability to transplant or refuse a kidney graft has probably been overestimated. Machine perfusion techniques have decreased delayed graft function and could improve graft survival. Investing 2 kidneys in 1 recipient does not make sense when a single KT would be enough, particularly in elderly recipients. Tailored immunosuppression when transplanting an old kidney may be useful, but no formal trials are available.Old donors constitute an enormous source of useful kidneys, but their retrieval in many countries is infrequent. The assumption of limited but precious functional expectancy for an old kidney and substantial reduction of discard rates should be generalized to mitigate these limitations.
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