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Machine perfusion renal

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https://read.qxmd.com/read/30736971/preliminary-experience-with-hypothermic-oxygenated-machine-perfusion-in-an-italian-liver-transplant-center
#1
D Dondossola, C Lonati, A Zanella, M Maggioni, B Antonelli, P Reggiani, S Gatti, G Rossi
BACKGROUND: Machine perfusion is increasingly utilized in liver transplantation to face the detrimental consequences of the use of extended-criteria donors. Hypothermic oxygenated machine perfusion (HOPE) appears to be more protective relative to static cold storage. Conversely, normothermic machine perfusion (NMP) allows a better graft evaluation. We describe a pilot prospective study on machine perfusion in selected grafts. METHODS: HOPE was executed for all the grafts procured from donors after cardiac death (DCDs) and for livers from donors after brain death (DBDs) requiring prolonged preservation time...
January 2019: Transplantation Proceedings
https://read.qxmd.com/read/30626882/the-r-enantiomer-of-the-6-chromanol-derivate-sul-121-improves-renal-graft-perfusion-via-antagonism-of-the-%C3%AE-1-adrenoceptor
#2
D Nakladal, H Buikema, A Reyes Romero, S P H Lambooy, J Bouma, G Krenning, P Vogelaar, A C van der Graaf, M R Groves, J Kyselovic, R H Henning, L E Deelman
SUL-compounds are protectants from cold-induced ischemia and mitochondrial dysfunction. We discovered that adding SUL-121 to renal grafts during warm machine reperfusion elicits a rapid improvement in perfusion parameters. Therefore, we investigate the molecular mechanisms of action in porcine intrarenal arteries (PIRA). Porcine kidneys were stored on ice overnight and perfusion parameters were recorded during treatment with SUL-compounds. Agonist-induced vasoconstriction was measured in isolated PIRA after pre-incubation with SUL-compounds...
January 9, 2019: Scientific Reports
https://read.qxmd.com/read/30575360/-modern-radiology-diagnostics-methods-for-assessment-of-renal-perfusion-in-patients-with-urinary-stone-disease
#3
K A Aleksandrova, V I Rudenko, N S Serova, M A Gazimiev, L B Kapanadze
Urinary stone disease is the current issue for healthcare system worldwide. High prevalence of urinary stone disease (at least 5% of the population of developed countries) determines clinical significance of the studying of its etiology and pathogenesis, improving of diagnostic methods and novel treatment technologies. The development of endoscopic devices, creation of new eswl machines and improvement of endourology interventions under X-ray guidance allowed to solve the problem of surgical treatment. Therefore, one of the actual issue is the choice of X-ray method for predicting and evaluating of treatment efficiency in patients with urinary stone disease...
December 2018: Urologii︠a︡
https://read.qxmd.com/read/30511774/role-of-erythrocytes-in-short-term-rewarming-kidney-perfusion-after-cold-storage
#4
Thomas Minor, Charlotte von Horn, Andreas Paul
Short term normothermic reconditioning by machine perfusion after cold storage has shown beneficial effects in renal transplantation models. Systematic investigations concerning the inclusion of washed erythrocytes as oxygen carriers are lacking in this context. Porcine kidneys were subjected to 20h of static cold storage. Prior to reperfusion, grafts were put on a machine for 2h of oxygenated (95% O2 ; 5% CO2 ) rewarming perfusion. In one group (n=6) washed erythrocytes were added to the perfusate after temperature has reached 20°C; the other group (n=6) was run without additives...
December 4, 2018: Artificial Organs
https://read.qxmd.com/read/30461718/the-effects-of-oxygenation-on-ex-vivo-kidneys-undergoing-hypothermic-machine-perfusion
#5
Kamlesh Patel, Thomas B Smith, Desley Ah Neil, Alpesh Thakker, Yugo Tsuchiya, Ellen B Higgs, Nikolas J Hodges, Andrew R Ready, Jay Nath, Christian Ludwig
BACKGROUND: Supplemental oxygenation of the standard Hypothermic Machine Perfusion (HMP) circuit has the potential to invoke favourable changes in metabolism, optimising cadaveric organs prior to transplantation. METHODS: Eight pairs of porcine kidneys underwent 18 hours of either oxygenated (HMP/O2) or aerated (HMP/Air) HMP in a paired DCD model of transplantation. Circulating perfusion fluid was supplemented with the metabolic tracer universally labelled glucose ([U-C] glucose)...
November 19, 2018: Transplantation
https://read.qxmd.com/read/30425194/beneficial-effect-of-moderately-increasing-hypothermic-machine-perfusion-pressure-on-donor-after-cardiac-death-renal-transplantation
#6
Chen-Guang Ding, Pu-Xun Tian, Xiao-Ming Ding, He-Li Xiang, Yang Li, Xiao-Hui Tian, Feng Han, Qian-Hui Tai, Qian-Long Liu, Jin Zheng, Wu-Jun Xue
Background: Vascular resistance and flow rate during hypothermic machine perfusion (HMP) of kidneys is correlated with graft function. We aimed to determine the effects of increasing HMP pressure versus maintaining the initial pressure on kidney transplantation outcomes. Methods: We retrospectively reviewed the data of 76 primary transplantation patients who received HMP-preserved kidneys from 48 donors after cardiac death between September 1, 2013, and August 31, 2015...
November 20, 2018: Chinese Medical Journal
https://read.qxmd.com/read/30299374/perfusion-of-porcine-kidneys-with-macromolecular-heparin-reduces-early-ischemia-reperfusion-injury
#7
Amir Sedigh, Sofia Nordling, Fredrik Carlsson, Erik Larsson, Bo Norlin, Norbert Lübenow, Fredrik Lennmyr, Gunnar Tufveson, Peetra U Magnusson, Tomas Lorant
BACKGROUND: Previously we have been able to demonstrate the possibility of coating the inner surface of the renal arteries in porcine kidneys with a heparin conjugate during hypothermic machine perfusion (HMP). The purpose of this study was to assess the efficacy of this treatment in reducing early ischemia-reperfusion injury. METHOD: Brain death was induced in male landrace pigs by stepwise volume expansion of an epidural balloon catheter until negative cerebral perfusion pressure was obtained...
October 6, 2018: Transplantation
https://read.qxmd.com/read/30282122/hypothermic-machine-perfusion-versus-static-cold-storage-in-deceased-donor-kidney-transplantation-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#8
REVIEW
Panxin Peng, Zhenshan Ding, Yuhui He, Jun Zhang, Xuming Wang, Zhihao Yang
BACKGROUND: Static cold storage (SCS) and hypothermic machine perfusion (HMP) are two primary options for renal allograft preservation. Compared with SCS, HMP decreased the incidence of delayed graft function (DGF) and protected graft function. However, more evidence is still needed to prove the advantages of the HMP. OBJECTIVE: In this study, the outcomes of kidney grafts from the two preservation methods were compared by conducting a systematic review and meta-analysis...
October 3, 2018: Artificial Organs
https://read.qxmd.com/read/30171799/the-effect-on-early-renal-function-of-various-dynamic-preservation-strategies-in-a-preclinical-pig-ischemia-reperfusion-autotransplant-model
#9
Tom Darius, Pierre Gianello, Martial Vergauwen, Nizar Mourad, Antoine Buemi, Martine De Meyer, Michel Mourad
The aims of this study were to determine the most optimal timing to start machine perfusion during kidney preservation to improve early graft function and to evaluate the impact of temperature and oxygen supply during machine perfusion in a porcine ischemia-reperfusion autotransplant model. The left kidney of an approximately 40-kg female Belgian Landrace pig was exposed to 30 minutes of warm ischemia via vascular clamping and randomized to 1 of 6 study groups: (1) 22-hour static cold storage (SCS) (n = 6), (2) 22-hour hypothermic machine perfusion (HMP) (n = 6), (3) 22-hour oxygenated HMP (n = 7), (4) 20-hour HMP plus 2-hour normothermic perfusion (NP) (n = 6), (5) 20-hour SCS plus 2-hour oxygenated HMP (n = 7), and (6) 20-hour SCS plus 2-hour NP (n = 6)...
September 1, 2018: American Journal of Transplantation
https://read.qxmd.com/read/30085267/the-development-of-a-predictive-model-of-graft-function-in-uncontrolled-donors-after-circulatory-death-validity-of-a-pulsatile-renal-preservation-machine-cut-off-value-for-kidney-acceptance
#10
Rosana Gelpi, David Paredes, Camino Rodríguez-Villar, Rebeca Roque, Angel Ruiz, Ramon Adalia, Luis Peri-Cusí, Manel Sole, Federico Oppenheimer, Fritz Diekmann
Background: The criteria for kidney suitability in uncontrolled donors after circulatory death (uDCD) procured after regional normothermic perfusion are based on macroscopic appearance and renal haemodynamic values with final renal resistance (FRR). However, these criteria have not been analysed to predict the future graft function. This study presents a model to predict the outcome in uDCD kidneys and define the predictive FRR value. Methods: All uDCD kidney transplants performed in our hospital from 2004 to 2016 were included...
August 6, 2018: Nephrology, Dialysis, Transplantation
https://read.qxmd.com/read/30018731/improved-approach-for-normothermic-machine-perfusion-of-cold-stored-kidney-grafts
#11
Charlotte von Horn, Thomas Minor
Normothermic machine perfusion can decrease reperfusion injury in renal transplantation. Clinical procurement logistics include retrieval and initial transport of the graft using static cold storage. Therefore, use and benefits of brief normothermic reconditioning by machine perfusion should be investigated in the initially cold preserved graft. Porcine kidneys (6 per group) were retrieved 20 min after cardiac standstill. After 20 h of static cold preservation some grafts were put on a machine perfusion circuit and normothermically perfused for 2 h at 35°C (NMP)...
2018: American Journal of Translational Research
https://read.qxmd.com/read/29952816/combined-ex-vivo-hypothermic-and-normothermic-perfusion-for-assessment-of-high-risk-deceased-donor-human-kidneys-for-transplantation
#12
Sandra K Kabagambe, Ivonne P Palma, Yulia Smolin, Tristan Boyer, Ivania Palma, Junichiro Sageshima, Christoph Troppmann, Chandrasekar Santhanakrishnan, John P McVicar, Kuang-Yu Jen, Miriam Nuño, Richard V Perez
BACKGROUND: Despite careful clinical examination, procurement biopsy and assessment on hypothermic machine perfusion (HMP), a significant number of potentially useable deceased donor kidneys will be discarded because they are deemed unsuitable for transplantation. Ex vivo normothermic perfusion (EVNP) may be useful as a means to further assess high-risk kidneys to determine suitability for transplantation. METHODS: From June 2014 to October 2015, 7 kidneys (mean donor age 54...
June 27, 2018: Transplantation
https://read.qxmd.com/read/29929872/hypothermic-machine-perfusion-results-in-a-marginal-kidney-transplant-programme
#13
Victoria Gómez-Dos Santos, Mercedes Ruiz Hernández, Francisco Javier Burgos-Revilla
BACKGROUND: Hypothermic machine perfusion (HMP) of deceased donor kidneys is associated with a better outcome than static cold storage, predominantly in marginal donors. Nevertheless, there is little evidence supporting whether graft centre of origin and donor category impact HMP results. OBJECTIVE: To identify factors impacting HMP in transplantation from marginal donors. DESIGN, SETTING, AND PARTICIPANTS: Analysis of prospectively collected cohort data of expanded criteria donor (ECD) and donor after circulatory death (DCD) categories II and III was performed...
March 2018: European Urology Focus
https://read.qxmd.com/read/29916133/three-dimensional-indices-of-renal-perfusion-in-normal-pregnancy-and-pre-eclampsia
#14
Amanda Ali, Susan Addley, Stephen Ong
INTRODUCTION: We compared renal perfusion in normal pregnant women and women with pre-eclampsia using three-dimensional (3D) ultrasound. We measured the flow index (FI), vascular index (VI) and vascularisation flow index (VFI) which are believed to reflect vascularity and flow intensity. METHODS: Fourteen patients with normal pregnancy and 16 patients with pre-eclampsia were recruited. Imaging was conducted using a Voluson E8 machine and a 6-MHz trans-abdominal probe...
June 18, 2018: Irish Journal of Medical Science
https://read.qxmd.com/read/29878499/the-future-of-marginal-kidney-repair-in-the-context-of-normothermic-machine-perfusion
#15
REVIEW
Jenna R DiRito, Sarah A Hosgood, Gregory T Tietjen, Michael L Nicholson
Normothermic machine perfusion (NMP) is a technique that utilizes extracorporeal membrane oxygenation to recondition and repair kidneys at near body temperature prior to transplantation. The application of this new technology has been fueled by a significant increase in the use of the kidneys that were donated after cardiac death, which are more susceptible to ischemic injury. Preliminary results indicate that NMP itself may be able to repair marginal organs prior to transplantation. In addition, NMP serves as a platform for delivery of therapeutics...
October 2018: American Journal of Transplantation
https://read.qxmd.com/read/29792716/options-to-improve-the-quality-of-kidney-grafts-from-expanded-criteria-donors-experimental-study
#16
J Molacek, V Opatrný, V Treska, R Matejka, O Hes
INTRODUCTION: There is a worldwide discrepancy between the number of donors and the number of organs needed for transplantation, leading to certain expansion of criteria, resulting in acceptance of donor organs. This means that organs with worse parenchymal qualities may be harvested for transplantation. One possibility, how to ameliorate the quality of these organs, is to change the concept of their preservation during cold ischemia or even after sudden circulatory arrest, prior to the collection of the organ itself...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://read.qxmd.com/read/29697462/ex-vivo-machine-perfusion-for-kidney-preservation
#17
Matyas Hamar, Markus Selzner
PURPOSE OF REVIEW: Machine perfusion is a novel strategy to decrease preservation injury, improve graft assessment, and increase organ acceptance for transplantation. This review summarizes the current advances in ex-vivo machine-based kidney preservation technologies over the last year. RECENT FINDINGS: Ex-vivo perfusion technologies, such as hypothermic and normothermic machine perfusion and controlled oxygenated rewarming, have gained high interest in the field of organ preservation...
June 2018: Current Opinion in Organ Transplantation
https://read.qxmd.com/read/29607529/transplantation-of-cold-stored-porcine-kidneys-after-controlled-oxygenated-rewarming
#18
Anja Gallinat, Jing Lu, Charlotte von Horn, Moritz Kaths, Marc Ingenwerth, Andreas Paul, Thomas Minor
The concept of "controlled oxygenated rewarming" (COR) using ex vivo machine perfusion after cold storage was evaluated as tool to improve renal graft function after transplantation. Renal function after 20 min warm ischemia and 21 h cold storage was studied in an auto-transplant model in pigs (25-30 kg, n = 6 per group). In the study group, preimplant ex vivo machine perfusion for 90 min was added after cold storage, including gentle warming up of the graft to 20°C (COR). Kidneys that were only cold stored for 21 h served as controls...
June 2018: Artificial Organs
https://read.qxmd.com/read/29602202/renal-resistance-trend-during-hypothermic-machine-perfusion-is-more-predictive-of-postoperative-outcome-than-biopsy-score-preliminary-experience-in-35-consecutive-kidney-transplantations
#19
Massimiliano Bissolati, Paolo Giovanni Gazzetta, Rossana Caldara, Giovanni Guarneri, Olga Adamenko, Fabio Giannone, Michele Mazza, Giulia Maggi, Deborah Tomanin, Riccardo Rosati, Antonio Secchi, Carlo Socci
Hypothermic machine perfusion (HPM) grants a better postoperative outcome in transplantation of organs procured from extended criteria donors (ECDs) and donors after cardiac death (DCD). So far, the only available parameter for outcome prediction concerning those organs is pretransplant biopsy score. The aim of this study is to evaluate whether renal resistance (RR) trend during HPM may be used as a predictive marker for post-transplantation outcome. From December 2015 to present, HMP has been systematically applied to all organs from ECDs and DCD...
July 2018: Artificial Organs
https://read.qxmd.com/read/29570164/the-benefits-of-hypothermic-machine-preservation-and-short-cold-ischemia-times-in-deceased-donor-kidneys
#20
Jasper Kox, Cyril Moers, Diethard Monbaliu, Agita Strelniece, Jürgen Treckmann, Ina Jochmans, Henri Leuvenink, Ernest Van Heurn, Jacques Pirenne, Andreas Paul, Rutger Ploeg
BACKGROUND: Hypothermic machine perfusion (HMP) of deceased donor kidneys is associated with better outcome when compared to static cold storage (CS). Nevertheless, there is little evidence whether kidneys with short cold ischemia time (CIT) also benefit from HMP and whether HMP can safely extend CIT. METHODS: We analyzed prospectively collected data from the Machine Preservation Trial, an international randomized controlled trial. Seven hundred fifty-two consecutive renal transplants were included: 1 kidney of each of the 376 donors was preserved by HMP, the contralateral organ was preserved by CS...
August 2018: Transplantation
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