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Noya-Mourullo A, Martín-Parada A, Palacios-Hernández A, Eguiluz-Lumbreras P, Heredero-Zorzo Ó, García-Gómez F, Álvarez-Ossorio-Fernández JL, Álvarez-Ossorio-Rodal A, Márquez-Sánchez MT, Flores-Fraile J, Fraile-Gómez P, Padilla-Fernández BY, Lorenzo-Gómez MF. Enhancing Kidney Transplant Outcomes: The Impact of Living Donor Programs. J Pers Med 2024; 14:408. [PMID: 38673035 PMCID: PMC11051259 DOI: 10.3390/jpm14040408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/03/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
INTRODUCTION The protocol for deceased donor kidney transplants has been standardised. The procedure for a living donor has peculiarities derived from the differences in the graft. When a living kidney donor program is implemented, changes occur in both the profile of the kidney transplant candidate and in the postoperative treatments. AIMS To discover whether a living donor program influences the functional outcomes of kidney grafts in a longstanding classical deceased donor kidney transplant program and to identify the factors associated with transplant outcomes. METHODS Retrospective observational multicentre study. SAMPLE Kidney transplant patients in two urology referral centres for renal transplant in Spain between 1994 and 2019. Groups: TV (living transplant): patients given kidney transplants from living donors (n = 150); TCpre11 (deceased transplant previous to 2011): patients given kidney transplants from deceased donors before the living donor program was implemented (n = 650); and TCpost11 (deceased transplant after 2011): patients given kidney transplants from deceased donors after the living donor program was implemented (n = 500). RESULTS Mean age was 55.75 years (18-80 years), higher in TCpre11. There were 493 female patients (37.92%) and 1007 male patients (62.08%). Mean body mass index (BMI) was 26.69 kg/m2 (17.50-42.78 kg/m2), higher in TCpre11. Mean ischemia time was 17.97 h (6-29 h), higher in TCpost11. Median duration of urethral catheter: 8 days (6-98 days), higher in TCpost11. Median duration of double-J ureteral stent: 58 days (24-180 days), higher in TCpost11. Pretransplant UTIs: 17.77%, higher in TCpre11 (25.69%) than in TV (12%), higher in TV (12%) than TCpost11 (9.2%), and higher in TCpre11 (25.69%) than TCpost11 (9.2%). Acute renal rejection in 9.33% of TV, 14.77% of TCpre11, and 9.8% of TCpost11. Multivariate analysis: TCpost11 featured higher BMI, more smoking, and chronic renal failure progression time. Lower use of nonantibiotic prophylaxis to prevent recurrent urinary tract infections, increased duration of urethral catheters due to obstructive problems, and favoured deterioration of kidney function was observed in the deceased donor program. The living donor (LD) program had a strong influence on deceased donor transplants in the prelysis phase. Implementation of a LD program was associated with a decrease in the likelihood of acute rejection in TCpost11 and an increase in the tendency towards normal kidney function. CONCLUSIONS Implementing living donor transplant programs affects functional outcomes in deceased donor transplants, reducing the probability of acute rejection and increasing the tendency towards normal kidney function. Preventing recurrent urinary tract infections with measures other than antibiotics, smoking cessation, delaying the removal of the double-J stent from the graft, and pre-emptive transplant (transplant prior to dialysis) are associated with improved renal function of the graft.
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Affiliation(s)
- Andrea Noya-Mourullo
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
- Department of Surgery, University of Salamanca, 37007 Salamanca, Spain (M.-T.M.-S.)
| | - Alejandro Martín-Parada
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
| | - Alberto Palacios-Hernández
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
| | - Pablo Eguiluz-Lumbreras
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
| | - Óscar Heredero-Zorzo
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
| | - Francisco García-Gómez
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
| | | | | | | | - Javier Flores-Fraile
- Department of Surgery, University of Salamanca, 37007 Salamanca, Spain (M.-T.M.-S.)
| | - Pilar Fraile-Gómez
- Nephrology Department, University Hospital of Salamanca, 37007 Salamanca, Spain;
| | | | - María-Fernanda Lorenzo-Gómez
- Urology Department, University Hospital of Salamanca, 37007 Salamanca, Spain; (A.N.-M.); (Ó.H.-Z.); (F.G.-G.)
- Department of Surgery, University of Salamanca, 37007 Salamanca, Spain (M.-T.M.-S.)
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Husain SA, Khanna S, Yu M, Adler JT, Cron DC, King KL, Schold JD, Mohan S. Cold Ischemia Time and Delayed Graft Function in Kidney Transplantation: A Paired Kidney Analysis. Transplantation 2024:00007890-990000000-00713. [PMID: 38557641 DOI: 10.1097/tp.0000000000005006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
BACKGROUND We aimed to understand the association between cold ischemia time (CIT) and delayed graft function (DGF) after kidney transplantation and the impact of organ pumping on that association. METHODS Retrospective cohort study using US registry data. We identified kidney pairs from the same donor where both kidneys were transplanted but had a CIT difference >0 and ≤20 h. We determined the frequency of concordant (both kidneys with/without DGF) or discordant (only 1 kidney DGF) DGF outcomes. Among discordant pairs, we computed unadjusted and adjusted relative risk of DGF associated with longer-CIT status, when then repeated this analysis restricted to pairs where only the longer-CIT kidney was pumped. RESULTS Among 25 831 kidney pairs included, 71% had concordant DGF outcomes, 16% had only the longer-CIT kidney with DGF, and 13% had only the shorter-CIT kidney with DGF. Among discordant pairs, longer-CIT status was associated with a higher risk of DGF in unadjusted and adjusted models. Among pairs where only the longer-CIT kidney was pumped, longer-CIT kidneys that were pumped had a lower risk of DGF than their contralateral shorter-CIT kidneys that were not pumped regardless of the size of the CIT difference. CONCLUSIONS Most kidney pairs have concordant DGF outcomes regardless of CIT difference, but even small increases in CIT raise the risk of DGF. Organ pumping may mitigate and even overcome the adverse consequences of prolonged CIT on the risk of DGF, but prospective studies are needed to better understand this relationship.
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Affiliation(s)
- Syed Ali Husain
- Division of Nephrology, Department of Medicine, Columbia University College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology Group, New York, NY
| | - Sohil Khanna
- Division of Nephrology, Department of Medicine, Columbia University College of Physicians & Surgeons, New York, NY
| | - Miko Yu
- Division of Nephrology, Department of Medicine, Columbia University College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology Group, New York, NY
| | - Joel T Adler
- Department of Surgery and Perioperative Care, Dell Medical School, University of Texas at Austin, Austin, TX
| | - David C Cron
- Department of Surgery, Massachusetts General Hospital, Boston, MA
| | - Kristen L King
- Division of Nephrology, Department of Medicine, Columbia University College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology Group, New York, NY
| | - Jesse D Schold
- Department of Surgery, University of Colorado-Anschutz Medical Campus, Aurora, CO
- Department of Epidemiology, School of Public Health, University of Colorado-Anschutz Medical Campus, Aurora, CO
| | - Sumit Mohan
- Division of Nephrology, Department of Medicine, Columbia University College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology Group, New York, NY
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
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Pruett TL, Martin P, Gupta D. Outcomes of kidneys used for transplantation: an analysis of survival and function. FRONTIERS IN TRANSPLANTATION 2024; 3:1335999. [PMID: 38993770 PMCID: PMC11235350 DOI: 10.3389/frtra.2024.1335999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 02/19/2024] [Indexed: 07/13/2024]
Abstract
Introduction Kidney transplant recipients expect to survive the procedure with sufficient renal function for reliable dialysis freedom. Methods Transplant outcomes (survival and estimated renal function) were assessed after live and deceased donor transplantation from the US national database. Outcomes were stratified by age (donor and recipient) and donor type. Results Aggregate recipient outcomes were better transplanting living vs deceased donated kidneys. However, when stratified by the one-year renal function (within KDIGO CKD stage stratifications), surviving recipients had clinically similar dialysis-freedom, irrespective of donor type or age. The major outcome differences for recipients of age-stratified live and deceased kidneys was 1) the increasing frequency of one-year graft failures and 2) the increasing likelihood of severely limited renal function (CKD 4/5) with advancing donor age. Over 30% of recipients of deceased kidneys >65 years had either one-year graft failure or severely limited renal function contrasted to less than 15% of recipients of live kidneys aged >65 years. Conclusions Evolving techniques to reduce adverse events after urgent vs elective procedures, plus improved transplant outcome predictability with increased-age deceased donor kidneys using advanced predictive analytics (using age-stratified live kidney transplantation outcomes as a relevant reference point) should facilitate similar kidney transplant outcomes, irrespective of donor type.
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Affiliation(s)
- Timothy L. Pruett
- Division of Transplantation, University of Minnesota School of Medicine, Minneapolis, MN, United States
| | - Paola Martin
- ODT, Kelley School of Business, Indiana University, Bloomington, IN, United States
| | - Diwakar Gupta
- IROM, The McCombs School of Business at University of Texas (Austin), Austin, TX, United States
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Punukollu R, Ohara SY, Budhiraja P, Smith ML, Kumm K, Ruch B, Misra S, Reddy KS, Heilman RL, Jadlowiec CC. Duration of Dialysis in Acute Kidney Injury Donors and Transplant Outcomes. J Am Coll Surg 2024; 238:61-69. [PMID: 37870238 DOI: 10.1097/xcs.0000000000000870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
BACKGROUND Acute kidney injury (AKI) kidneys, including those from donors on dialysis, are often underutilized, although there is increasing data available demonstrating good transplant outcomes. To date, data on the duration of donor dialysis and transplant outcomes are limited. STUDY DESIGN This was a single-center study of deceased donor kidney transplants from 2010 to 2022. The study cohort consisted of recipients of deceased donor kidney transplants from donors with AKI and on dialysis. Three groups were identified based on the predetermined interquartile range of donor dialysis duration: 1 to 2 dialysis days, 3 to 4 dialysis days, and 5 or more dialysis days. RESULTS During this period, 765 AKI deceased donor transplants were performed, of which 230 were from donors on dialysis. The median dialysis duration was 2 days with a maximum of 13 days. Across the 3 groups, there were no differences in recipient age (p = 0.23) or dialysis vintage (p = 0.70). Donor age (p = 0.86) and kidney donor profile index (p = 0.57) were comparable between the groups. Recipients of deceased donor kidney transplants from donors on dialysis 5 or more days had lower terminal creatinine levels (p = 0.003) and longer cold ischemia times (p = 0.04). Posttransplant, the median length of hospital stay was 3 days for all groups (p = 0.75). There were no differences in delayed graft function occurrence (94.4% vs 86.8% vs 92.1%, p = 0.19), duration of delayed graft function (p = 0.56), or readmissions (p = 0.99). At 1 year posttransplant, the estimated glomerular filtration rate (p = 0.76), patient survival (p = 0.82), or death-censored graft survival (p = 0.28) were comparable. CONCLUSIONS Excellent outcomes have been observed in AKI deceased donor kidney transplants, including those coming from donors on dialysis. In this small cohort, the duration of donor dialysis did not adversely affect outcomes. Cautious expansion of the donor pool, including donors on dialysis, should be considered given the ongoing organ shortage.
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Affiliation(s)
- Rachana Punukollu
- From the Division of Transplant Surgery, Department of Surgery (Punukollu, Kumm, Ruch, Reddy, Jadlowiec) Mayo Clinic, Phoenix, AZ
| | - Stephanie Y Ohara
- Division of Surgery, Valleywise Health Medical Center, Creighton University (Ohara), Phoenix, AZ
| | - Pooja Budhiraja
- Division of Nephrology (Budhiraja, Misra, Heilman) Mayo Clinic, Phoenix, AZ
| | - Maxwell L Smith
- Division of Anatomic Pathology (Smith) Mayo Clinic, Phoenix, AZ
| | - Kayla Kumm
- From the Division of Transplant Surgery, Department of Surgery (Punukollu, Kumm, Ruch, Reddy, Jadlowiec) Mayo Clinic, Phoenix, AZ
| | - Brianna Ruch
- From the Division of Transplant Surgery, Department of Surgery (Punukollu, Kumm, Ruch, Reddy, Jadlowiec) Mayo Clinic, Phoenix, AZ
| | - Suman Misra
- Division of Nephrology (Budhiraja, Misra, Heilman) Mayo Clinic, Phoenix, AZ
| | - Kunam S Reddy
- From the Division of Transplant Surgery, Department of Surgery (Punukollu, Kumm, Ruch, Reddy, Jadlowiec) Mayo Clinic, Phoenix, AZ
| | - Raymond L Heilman
- Division of Nephrology (Budhiraja, Misra, Heilman) Mayo Clinic, Phoenix, AZ
| | - Caroline C Jadlowiec
- From the Division of Transplant Surgery, Department of Surgery (Punukollu, Kumm, Ruch, Reddy, Jadlowiec) Mayo Clinic, Phoenix, AZ
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Jadlowiec CC, Thongprayoon C, Tangpanithandee S, Punukollu R, Leeaphorn N, Cooper M, Cheungpasitporn W. Re-assessing prolonged cold ischemia time in kidney transplantation through machine learning consensus clustering. Clin Transplant 2024; 38:e15201. [PMID: 38041480 DOI: 10.1111/ctr.15201] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/13/2023] [Accepted: 11/16/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND We aimed to cluster deceased donor kidney transplant recipients with prolonged cold ischemia time (CIT) using an unsupervised machine learning approach. METHODS We performed consensus cluster analysis on 11 615 deceased donor kidney transplant patients with CIT exceeding 24 h using OPTN/UNOS data from 2015 to 2019. Cluster characteristics of clinical significance were identified, and post-transplant outcomes were compared. RESULTS Consensus cluster analysis identified two clinically distinct clusters. Cluster 1 was characterized by young, non-diabetic patients who received kidney transplants from young, non-hypertensive, non-ECD deceased donors with lower KDPI scores. In contrast, the patients in cluster 2 were older and more likely to have diabetes. Cluster 2 recipients were more likely to receive transplants from older donors with a higher KDPI. There was lower use of machine perfusion in Cluster 1 and incrementally longer CIT in Cluster 2. Cluster 2 had a higher incidence of delayed graft function (42% vs. 29%), and lower 1-year patient (95% vs. 98%) and death-censored (95% vs. 97%) graft survival compared to Cluster 1. CONCLUSIONS Unsupervised machine learning characterized deceased donor kidney transplant recipients with prolonged CIT into two clusters with differing outcomes. Although Cluster 1 had more favorable recipient and donor characteristics and better survival, the outcomes observed in Cluster 2 were also satisfactory. Overall, both clusters demonstrated good survival suggesting opportunities for transplant centers to incrementally increase CIT.
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Affiliation(s)
| | - Charat Thongprayoon
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Supawit Tangpanithandee
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Napat Leeaphorn
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Matthew Cooper
- Division of Transplant Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Wisit Cheungpasitporn
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
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Jadlowiec CC, Ohara SY, Punukollu R, Wagler J, Ruch B, Kumm K, Budhiraja P, Me HM, Mathur AK, Reddy KS, Khamash H, Heilman R. Outcomes with transplanting kidneys offered through expedited allocation. Clin Transplant 2023; 37:e15094. [PMID: 37563488 DOI: 10.1111/ctr.15094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/12/2023]
Abstract
INTRODUCTION Expedited out-of-sequence deceased donor kidney allocation is a strategy to avoid discards after early placement attempts have been unsuccessful. Our study aimed to assess outcomes and characteristics of these transplanted kidneys. METHODS KDPI matching was performed between expedited allocation (EA) and standard allocation (SA) deceased donor kidney transplants performed at our center. RESULTS Between 2018 and 2021, there were 225 EA offers, and 189 (84%) were transplanted. EA recipients were older (p = .007) and had shorter dialysis vintage (p < .0001). EA kidneys were likely to be nationally allocated (p < .001), have AKI (p < .0001) and longer CIT (p < .0001). There were no differences in EA and SA time-zero kidney biopsies (ci, p = .07; ct, p = .89; cv, p = .95; ah, p = .79). EA kidneys had more DGF (p = .0006), but there were no differences in DGF duration (p = .83), hospital length of stay (p = .43), 1- and 2-year eGFR (p = .16, p = .99), patient (p = .34), or death-censored graft (p = .66) survival. CONCLUSION During this study period, our center transplanted 189 kidneys through EA following local-regional declines. These kidneys often came from AKI donors and had more DGF but had similar outcomes to KDPI-matched SA kidneys. Although it has been suggested that EA has the potential to worsen transplant disparities, transplant center level decisions on organ acceptance contribute to these variations.
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Affiliation(s)
- Caroline C Jadlowiec
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Stephanie Y Ohara
- Division of Surgery, Valleywise Health Medical Center, Creighton University, Phoenix, Arizona, USA
| | - Rachana Punukollu
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Josiah Wagler
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Brianna Ruch
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Kayla Kumm
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | | | - Hay Me Me
- Division of Nephrology, Mayo Clinic, Phoenix, Arizona, USA
| | - Amit K Mathur
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Kunam S Reddy
- Department of Surgery, Division of Transplant Surgery, Mayo Clinic, Phoenix, Arizona, USA
| | - Hasan Khamash
- Division of Nephrology, Mayo Clinic, Phoenix, Arizona, USA
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Punukollu R, Ryan M, Misra S, Budhiraja P, Ohara S, Kumm K, Guerra G, Reddy KS, Heilman R, Jadlowiec CC. Past, Current, and Future Perspectives on Transplanting Acute Kidney Injury Kidneys. Clin Pract 2023; 13:944-958. [PMID: 37623267 PMCID: PMC10453697 DOI: 10.3390/clinpract13040086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/24/2023] [Accepted: 08/08/2023] [Indexed: 08/26/2023] Open
Abstract
(1) Background: Acute kidney injury (AKI) kidneys have high non-utilization rates due to concerns regarding unfavorable outcomes. In this paper, we aimed to review the past, present, and future opinions on AKI kidneys. (2) Methods: A PubMed search was conducted for topics relevant to AKI kidney transplantation. (3) Results: Current short- and long-term data on AKI kidneys have demonstrated good outcomes including favorable graft function and survival. The role of procurement biopsies is controversial, but they have been shown to be beneficial in AKI kidneys by allowing clinicians to differentiate between reversible tubular injury and irreversible cortical necrosis. Machine perfusion has also been applied to AKI kidneys and has been shown to reduce delayed graft function (DGF). The incidence of DGF increases with AKI severity and its management can be challenging. Strategies employed to counteract this have included early initiation of dialysis after kidney transplantation, early targeting of adequate immunosuppression levels to minimize rejection risk, and establishment of outpatient dialysis. (4) Conclusions: Despite good outcomes, there continue to be barriers that impact AKI kidney utilization. Successful strategies have included use of procurement biopsies or machine perfusion and expectant management of DGF. With increasing experience, better use of AKI kidneys can result in additional opportunities to expand the donor pool.
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Affiliation(s)
- Rachana Punukollu
- Division of Transplant Surgery, Department of Surgery, Mayo Clinic, Phoenix, AZ 85054, USA
| | - Margaret Ryan
- Division of Anatomic Pathology, Mayo Clinic, Phoenix, AZ 85054, USA
| | - Suman Misra
- Division of Nephrology, Mayo Clinic, Phoenix, AZ 85054, USA
| | | | - Stephanie Ohara
- Division of Surgery, Valleywise Health Medical Center, Creighton University, Phoenix, AZ 85008, USA
| | - Kayla Kumm
- Division of Transplant Surgery, Department of Surgery, Mayo Clinic, Phoenix, AZ 85054, USA
| | - Giselle Guerra
- Division of Nephrology, Miami Transplant Institute, Miami, FL 33136, USA
| | - Kunam S. Reddy
- Division of Transplant Surgery, Department of Surgery, Mayo Clinic, Phoenix, AZ 85054, USA
| | | | - Caroline C. Jadlowiec
- Division of Transplant Surgery, Department of Surgery, Mayo Clinic, Phoenix, AZ 85054, USA
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Mahajan N, Heer MK, Trevillian PR. Renal transplant anastomotic time-Every minute counts! Front Med (Lausanne) 2023; 9:1024137. [PMID: 36743673 PMCID: PMC9889534 DOI: 10.3389/fmed.2022.1024137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 11/28/2022] [Indexed: 01/20/2023] Open
Abstract
The impact of anastomotic time in renal transplant is under recognized and not well studied. It is one of the few controllable factors that affect the incidence of delayed graft function (DGF). Our study aimed at quantifying the impact of anastomotic time. We performed a retrospective review of 424 renal transplants between the years 2006 and 2020. A total of 247 deceased donor renal transplants formed the study cohort. Patients were divided into two groups based on the presence or absence of DGF. Variables with p < 0.3 were analyzed using the binary logistic regression test. The final analysis showed anastomotic time to be significantly associated with DGF with odds ratio of 1.04 per minute corresponding to 4% increase in DGF incidence with every minute increment in anastomotic time. Other variables that had significant impact on DGF were DCD donor (odds ratio - 8.7) and donor terminal creatinine. We concluded that anastomotic time had significant impact on the development of DGF and hence should be minimized.
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Affiliation(s)
- Nikhil Mahajan
- Newcastle Transplant Unit, Division of Surgery, John Hunter Hospital, New Lambton Heights, NSW, Australia
| | - Munish K. Heer
- Newcastle Transplant Unit, Division of Surgery, John Hunter Hospital, New Lambton Heights, NSW, Australia,Hunter Transplant Research Foundation, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia,*Correspondence: Munish Heer,
| | - Paul R. Trevillian
- Hunter Transplant Research Foundation, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
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King KL, Husain SA, Perotte A, Adler JT, Schold JD, Mohan S. Deceased donor kidneys allocated out of sequence by organ procurement organizations. Am J Transplant 2022; 22:1372-1381. [PMID: 35000284 PMCID: PMC9081167 DOI: 10.1111/ajt.16951] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/20/2021] [Accepted: 01/03/2022] [Indexed: 01/25/2023]
Abstract
Deceased donor kidney allocation follows a ranked match-run of potential recipients. Organ procurement organizations (OPOs) are permitted to deviate from the mandated match-run in exceptional circumstances. Using match-run data for all deceased donor kidney transplants (Ktx) in the US between 2015 and 2019, we identified 1544 kidneys transplanted from 933 donors with an OPO-initiated allocation exception. Most OPOs (55/58) used this process at least once, but 3 OPOs performed 64% of the exceptions and just 2 transplant centers received 25% of allocation exception Ktx. At 2 of 3 outlier OPOs these transplants increased 136% and 141% between 2015 and 2019 compared to only a 35% increase in all Ktx. Allocation exception donors had less favorable characteristics (median KDPI 70, 41% with history of hypertension), but only 29% had KDPI ≥ 85% and the majority did not meet the traditional threshold for marginal kidneys. Allocation exception kidneys went to larger centers with higher offer acceptance ratios and to recipients with 2 fewer priority points-equivalent to 2 less years of waiting time. OPO-initiated exceptions for kidney allocation are growing increasingly frequent and more concentrated at a few outlier centers. Increasing pressure to improve organ utilization risks increasing out-of-sequence allocations, potentially exacerbating disparities in access to transplantation.
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Affiliation(s)
- Kristen L King
- Department of Medicine, Division of Nephrology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology (CURE) Group, New York, NY
| | - S Ali Husain
- Department of Medicine, Division of Nephrology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology (CURE) Group, New York, NY
| | - Adler Perotte
- Department of Biomedical Informatics, Columbia University, New York, NY
| | - Joel T. Adler
- Department of Surgery and Perioperative Care, Dell Medical School at the University of Texas at Austin, Austin, TX
| | - Jesse D Schold
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH
- Center for Populations Health Research, Lerner Research Institute, Cleveland Clinic, Cleveland, OH
| | - Sumit Mohan
- Department of Medicine, Division of Nephrology, Columbia University Vagelos College of Physicians & Surgeons, New York, NY
- The Columbia University Renal Epidemiology (CURE) Group, New York, NY
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
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Wang XW, Guo RD, Ma JG, Wang YW, Zou XF. Effects of prolonged cold ischemia on the DCD kidney function and Inflammasome expression in rat kidney transplants. Transpl Immunol 2022; 74:101511. [PMID: 35483644 DOI: 10.1016/j.trim.2021.101511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 11/10/2021] [Accepted: 11/23/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Acute kidney injury (AKI) is the main reason for the bad outcome of the donation of circulatory death (DCD) kidney after transplantation. Prolonged cold storage (CS) is a risk factor for the occurrence of the delayed graft function in DCD kidney. The protein NLR-domain containing receptor 3 (NLRP3) plays a crucial role in renal ischemia reperfusion injury by triggering inflammasome formation. Herein, we investigated whether the NLRP3 signal participate in the CS-induced damage of DCD kidney in rat kidney transplantation models. MATERIALS AND METHODS DCD kidney and living donor (LD) kidney of SD rats were preserved in UW solution at 4 °C for 2 h or 18 h, and then transplanted into syngeneic recipient. Thus, the animals were randomly divided into 4 groups: 2-h LD group, 2-h DCD group, 18-h LD group and 18-h DCD group. The renal function and pathological changes were determined. The expressions of NLRP3 and inflammatory factor IL-1β were assessed. The concentration of ferrous iron (Fe2+) was analyzed both in kidneys and in the preservation solution. The renal morphological changes were examined by hematoxylin eosin staining. RESULTS Our results showed that the levels of Cr and BUN were higher in 18-h LD group as compared to the 2-h LD group, which were remarkably increased in 18-h DCD group. The expression levels of NLRP3 and IL-1β were increased by 18-h CS compared to 2-h CS in both LD kidney and DCD kidney. In addition, the Fe2+ concentration has significantly increased in 18-h LD group than that in 2-h LD group, and the elevation of Fe2+ was more remarkable in DCD kidneys. CONCLUSION In conclusion, our study demonstrated that prolonged hypothermic storage of DCD kidney deteriorated the graft function via the increased Fe2+ concentration, which was associated with the upregulation of NLRP3 expression.
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Affiliation(s)
- Xiao-Wen Wang
- Nankai University, 94 Weijin Rd, Nankai District, China
| | - Ren-De Guo
- Tianjin First Central Hospital, Tianjin, Nankai District, China
| | - Jian-Gong Ma
- Nankai University, 94 Weijin Rd, Nankai District, China
| | - Yi-Wei Wang
- Tianjin First Central Hospital, Tianjin, Nankai District, China
| | - Xun-Feng Zou
- Tianjin First Central Hospital, Tianjin, Nankai District, China.
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11
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Harriman DI, Kazokov H, Rogers J, Farney AC, Orlando G, Jay C, Reeves-Daniel A, Stratta RJ. Does prolonged cold ischemia affect outcomes in donation after cardiac death donor kidney transplants? Clin Transplant 2022; 36:e14628. [PMID: 35239992 DOI: 10.1111/ctr.14628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 02/19/2022] [Accepted: 02/21/2022] [Indexed: 11/30/2022]
Abstract
: The purpose of this study was to analyze the combined effect of cold ischemia time (CIT) and donation after cardiac death (DCD, with requisite warm ischemia time, WIT) on kidney transplant (KT) outcomes. METHODS Single center retrospective review of DCD KT recipients stratified by CIT. RESULTS From 6/08 to 10/20, we performed 446 DCD KTs (115 CIT ≤20, 205 CIT 20-30, 88 CIT 30-40, 38 CIT ≥40 hours). Mean WITs (26/25/27/23 minutes) and KDPI values (59%/55%/55%/59%) were similar while mean CITs (16.4/23.6/33.4/42.5 hours) and pump times (10.3/13.6/16.1/20.4 hours) differed across groups (p < 0.05). With a mean 6-year follow-up, patient survival (84%/84%/74%/84%) was similar. Kidney graft survival (GS) (72%/72%/56%/58%) and death censored GS (DCGS) (82%/80%/63%/67%) rates decreased whereas rates of primary nonfunction (PNF, 0.9%/2.4%/9.1%/7.9%) and delayed graft function (DGF) (36%/48%/50%/69%) increased with longer CIT (≥30 hours, p<0.05). Meaningful years free of dialysis, which we refer to as Allograft Life Years, were achieved in all cohorts (4.5/4.3/3.9/4.3 years per patient transplanted). CONCLUSION DCD donor kidneys with prolonged CIT (≥30 hours) are associated with increased rates of DGF and PNF, along with decreased GS and DCGS. Despite this, Allograft Life Years were gained even with longer CITs, demonstrating the utility of using these allografts. This article is protected by copyright. All rights reserved.
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Affiliation(s)
| | - Herman Kazokov
- Urology, University of British Columbia, Vancouver, BC, Canada
| | - Jeffrey Rogers
- Surgery, Wake Forest Baptist Health, Winston-Salem, NC, United States
| | - Alan C Farney
- Surgery, Wake Forest Baptist Health, Winston-Salem, NC, United States
| | - Giuseppe Orlando
- Surgery, Wake Forest Baptist Health, Winston-Salem, NC, United States
| | - Collen Jay
- Surgery, Wake Forest Baptist Health, Winston-Salem, NC, United States
| | - Amber Reeves-Daniel
- Internal Medicine, Wake Forest Baptist Health, Winston-Salem, NC, United States
| | - Robert J Stratta
- Surgery, Wake Forest Baptist Health, Winston-Salem, NC, United States
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12
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Liu L, Cheng K, Huang J. Effect of Long Cold Ischemia Time of Kidneys from Aged Donors on Prognosis of Kidney Transplantation. Ann Transplant 2021; 26:e928735. [PMID: 34663778 PMCID: PMC8540027 DOI: 10.12659/aot.928735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
With the increasing incidence of end-stage renal disease (ESRD), patients' life span and life quality are significantly reduced. Kidney transplantation has gradually become the ideal method for treating ESRD, and the shortage of organ sources has become the main problem. In recent years, China has successfully realized the transformation of organ sources. Voluntary donation after the death of citizens has increased year by year, and the number of kidney transplantations has increased, which alleviates the organ shortage to a certain extent, but compared with the past, the increasing proportion of aged donors has also become an inevitable global problem. At the same time, due to the sudden and widespread distribution of voluntary donation, most donor kidneys have the problem of longer cold ischemic time (CIT). The probability of adverse events, such as delayed renal function recovery after transplantation, was also significantly increased. At present, there is little research on the effect of donor's aging and long CIT on the prognosis of renal transplantation. This paper reviews the literature in recent years and explore this problem from 2 aspects: the elderly donor and the long CIT.
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Affiliation(s)
- Lian Liu
- Center for Organ Transplantation, 3rd Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland).,Research Center of National Health Ministry on Transplantation Medicine Engineering and Technology, 3rd Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland).,Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China (mainland)
| | - Ke Cheng
- Center for Organ Transplantation, 3rd Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland).,Research Center of National Health Ministry on Transplantation Medicine Engineering and Technology, 3rd Xiangya Hospital, Central South University, Changsha, Hunan, China (mainland)
| | - Jufang Huang
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China (mainland)
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13
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Emmons BR, Husain SA, King KL, Adler JT, Mohan S. Variations in deceased donor kidney procurement biopsy practice patterns: A survey of U.S. organ procurement organizations. Clin Transplant 2021; 35:e14411. [PMID: 34196034 PMCID: PMC8556234 DOI: 10.1111/ctr.14411] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Procurement biopsies have become a common practice in the evaluation and allocation of deceased donor kidneys in the United States despite questions about their value and reproducibility. We sought to determine the extent of OPO-level differences in criteria used to decide which deceased donor kidneys undergo a procurement biopsy and to assess the degree of variability in procurement biopsy technique and interpretation across OPOs. METHODS Each of the country's 58 OPOs were invited to participate in the survey. OPOs were divided into two groups based on organ availability ratio and deceased donor kidney discard rate. RESULTS AND CONCLUSIONS Fifty-out-of-fifty-eight invited OPOs (86% response rate) responded to the survey between November 2020 and December 2020. Thirty (60%) OPOs reported that they have formal criteria for performing kidney procurement biopsy, but for 29 of these OPOs, transplant centers can request biopsy on kidneys that do not meet criteria. OPOs used a total of seven different variables and 12 different numerical thresholds to define impaired kidney function that would prompt a procurement biopsy. Additionally, wide variability was seen in biopsy technique and procedures for biopsy interpretation and reporting of findings to transplant programs. These findings identify a clear opportunity for standardization of procurement biopsies to best practices.
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Affiliation(s)
- Brendan R. Emmons
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, NY
| | - S. Ali Husain
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, NY
- The Columbia University Renal Epidemiology (CURE) Group, New York, NY
| | - Kristen L. King
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, NY
- The Columbia University Renal Epidemiology (CURE) Group, New York, NY
| | - Joel T. Adler
- Department of Surgery, Division of Transplant Surgery, Brigham and Women’s Hospital, Boston, MA
- Center for Surgery and Public Health at Brigham and Women’s Hospital, Boston, MA
| | - Sumit Mohan
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, NY
- The Columbia University Renal Epidemiology (CURE) Group, New York, NY
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
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14
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Jung CW, Jorgensen D, Sood P, Mehta R, Molinari M, Hariharan S, Ganoza A, Van Der Windt D, Wijkstrom MN, Puttarajappa CM, Tevar AD. Outcomes and factors leading to graft failure in kidney transplants from deceased donors with acute kidney injury-A retrospective cohort study. PLoS One 2021; 16:e0254115. [PMID: 34437548 PMCID: PMC8389362 DOI: 10.1371/journal.pone.0254115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/20/2021] [Indexed: 11/18/2022] Open
Abstract
Due to shortage of donor, kidney transplants (KTs) from donors with acute kidney injury (AKI) are expanding. Although previous studies comparing clinical outcomes between AKI and non-AKI donors in KTs have shown comparable results, data on high-volume analysis of KTs outcomes with AKI donors are limited. This study aimed to analyze the selection trends of AKI donors and investigate the impact of AKI on graft failure using the United states cohort data. We analyzed a total 52,757 KTs collected in the Scientific Registry of Transplant Recipient (SRTR) from 2010 to 2015. The sample included 4,962 (9.4%) cases of KTs with AKI donors (creatinine ≥ 2 mg/dL). Clinical characteristics of AKI and non-AKI donors were analyzed and outcomes of both groups were compared. We also analyzed risk factors for graft failure in AKI donor KTs. Although the incidence of delayed graft function was higher in recipients of AKI donors compared to non-AKI donors, graft and patient survival were not significantly different between the two groups. We found donor hypertension, cold ischemic time, the proportion of African American donors, and high KDPI were risk factors for graft failure in AKI donor KTs. KTs from deceased donor with AKI showed comparable outcomes. Thus, donors with AKI need to be considered more actively to expand donor pool. Caution is still needed when donors have additional risk factors of graft failure.
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Affiliation(s)
- Cheol Woong Jung
- Department of Surgery, Korea University Anam Hospital, Seoul, Korea
| | - Dana Jorgensen
- Department of Surgery, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Puneet Sood
- Department of Internal Medicine, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Rajil Mehta
- Department of Internal Medicine, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Michele Molinari
- Department of Surgery, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Sundaram Hariharan
- Department of Internal Medicine, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Armando Ganoza
- Department of Surgery, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Dirk Van Der Windt
- Department of Surgery, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Martin N. Wijkstrom
- Department of Surgery, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Chethan M. Puttarajappa
- Department of Internal Medicine, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
| | - Amit D. Tevar
- Department of Surgery, Thomas E Starzl Transplantation Institute, University Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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15
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Palmisano A, Gandolfini I, Delsante M, Cantarelli C, Fiaccadori E, Cravedi P, Maggiore U. Acute Kidney Injury (AKI) before and after Kidney Transplantation: Causes, Medical Approach, and Implications for the Long-Term Outcomes. J Clin Med 2021; 10:1484. [PMID: 33918444 PMCID: PMC8038198 DOI: 10.3390/jcm10071484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 12/14/2022] Open
Abstract
Acute kidney injury (AKI) is a common finding in kidney donors and recipients. AKI in kidney donor, which increases the risk of delayed graft function (DGF), may not by itself jeopardize the short- and long-term outcome of transplantation. However, some forms of AKI may induce graft rejection, fibrosis, and eventually graft dysfunction. Therefore, various strategies have been proposed to identify conditions at highest risk of AKI-induced DGF, that can be treated by targeting the donor, the recipient, or even the graft itself with the use of perfusion machines. AKI that occurs early post-transplant after a period of initial recovery of graft function may reflect serious and often occult systemic complications that may require prompt intervention to prevent graft loss. AKI that develops long after transplantation is often related to nephrotoxic drug reactions. In symptomatic patients, AKI is usually associated with various systemic medical complications and could represent a risk of mortality. Electronic systems have been developed to alert transplant physicians that AKI has occurred in a transplant recipient during long-term outpatient follow-up. Herein, we will review most recent understandings of pathophysiology, diagnosis, therapeutic approach, and short- and long-term consequences of AKI occurring in both the donor and in the kidney transplant recipient.
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Affiliation(s)
- Alessandra Palmisano
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (I.G.); (M.D.); (C.C.); (E.F.); (U.M.)
| | - Ilaria Gandolfini
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (I.G.); (M.D.); (C.C.); (E.F.); (U.M.)
- Nephrology Unit, Parma University Hospital, 43126 Parma, Italy
| | - Marco Delsante
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (I.G.); (M.D.); (C.C.); (E.F.); (U.M.)
- Nephrology Unit, Parma University Hospital, 43126 Parma, Italy
| | - Chiara Cantarelli
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (I.G.); (M.D.); (C.C.); (E.F.); (U.M.)
| | - Enrico Fiaccadori
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (I.G.); (M.D.); (C.C.); (E.F.); (U.M.)
- Nephrology Unit, Parma University Hospital, 43126 Parma, Italy
| | - Paolo Cravedi
- Renal Division, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Umberto Maggiore
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (I.G.); (M.D.); (C.C.); (E.F.); (U.M.)
- Nephrology Unit, Parma University Hospital, 43126 Parma, Italy
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16
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Troppmann C, Santhanakrishnan C, Fananapazir G, Sageshima J, Troppmann KM, Perez RV. Short- and Long-term Outcomes of Kidney Transplants From Very Small (≤15 kg) Pediatric Donors With Acute Kidney Injury. Transplantation 2021; 105:430-435. [PMID: 32217942 DOI: 10.1097/tp.0000000000003230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Kidneys from small deceased pediatric donors with acute kidney injury (AKI) are commonly discarded owing to transplant centers' concerns regarding potentially inferior short- and long-term posttransplant outcomes. METHODS We retrospectively analyzed our center's en bloc kidney transplants performed from November 2007 to January 2015 from donors ≤15 kg into adult recipients (≥18 y). We pair-matched grafts from 27 consecutive donors with AKI versus 27 without AKI for donor weight, donation after circulatory death status, and preservation time. RESULTS For AKI versus non-AKI donors, median weight was 7.5 versus 7.1 kg; terminal creatinine was 1.7 (range, 1.1-3.3) versus 0.3 mg/dL (0.1-0.9). Early graft loss rate from thrombosis or primary nonfunction was 11% for both groups. Delayed graft function rate was higher for AKI (52%) versus non-AKI (15%) grafts (P = 0.004). Median estimated glomerular filtration rate was lower for AKI recipients only at 1 and 3 months (P < 0.03). Graft survival (death-censored) at 8 years was 78% for AKI versus 77% for non-AKI grafts. Late proteinuria rates for AKI versus non-AKI recipients with >4 years follow-up were not significantly different. CONCLUSIONS Small pediatric donor AKI impacted early posttransplant kidney graft function, but did not increase risk for early graft loss and decreased long-term function. The presently high nonutilization rates for en bloc kidney grafts from very small pediatric donors with AKI appear therefore unjustified. Based on the outcomes of the present study, we infer that the reluctance to transplant single kidneys from larger pediatric donors with AKI lacks a rational basis as well. Our findings warrant further prospective study and confirmation in larger study cohorts.
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Affiliation(s)
- Christoph Troppmann
- Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA
| | | | - Ghaneh Fananapazir
- Department of Radiology, University of California, Davis School of Medicine, Sacramento, CA
| | - Junichiro Sageshima
- Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA
| | - Kathrin M Troppmann
- Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA
| | - Richard V Perez
- Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA
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17
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Yu K, King K, Husain SA, Dube GK, Stevens JS, Ratner LE, Cooper M, Parikh CR, Mohan S. Kidney nonprocurement in solid organ donors in the United States. Am J Transplant 2020; 20:3413-3425. [PMID: 32342627 PMCID: PMC8448558 DOI: 10.1111/ajt.15952] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/29/2020] [Accepted: 04/13/2020] [Indexed: 01/25/2023]
Abstract
There are limited data on the nonprocurement of kidneys from solid organ donors. Analysis of Standard Transplant Analysis and Research files was undertaken on all deceased donors in the United States with at least 1 solid organ recovered. From 2000 to 2018, 21 731 deceased donor kidneys (averaging 1144 kidneys per year) were not procured. No kidneys were procured from 8% of liver donors, 3% of heart donors, and 3% of lung donors. Compared to donors with all kidneys procured, those with none procured were older and more likely obese, black, hypertensive, diabetic, hepatitis C positive, smokers, Public Health Service - Increased Risk designated, deceased after cardiac death, or deceased after cerebrovascular accident. Although these donors had lower quality kidneys (median Kidney Donor Risk Index (interquartile range) 1.9 (1.0) vs 1.2 (0.7)), there was substantial overlap in quality between nonprocured and procured kidneys. Nearly one third of nonprocurements were attributed to donor history. Donors with elevated terminal creatinine likely resulting from acute kidney injury (AKI) had higher odds of kidney nonprocurement. Nonprocurement odds varied widely across Organ Procurement and Transplantation Network regions, with a positive correlation between donor kidney nonprocurements and kidney discards at the donation service area level. These findings suggest current discard rates underestimate the underutilization of deceased donor kidneys and more research is needed to optimize safe procurement and utilization of kidneys from donors with AKI.
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Affiliation(s)
- Kathleen Yu
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, New York,The Columbia University Renal Epidemiology (CURE) Group, New York, New York
| | - Kristen King
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, New York,The Columbia University Renal Epidemiology (CURE) Group, New York, New York
| | - Syed A. Husain
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, New York,The Columbia University Renal Epidemiology (CURE) Group, New York, New York
| | - Geoffrey K. Dube
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, New York
| | - Jacob S. Stevens
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, New York
| | - Lloyd E. Ratner
- Department of Surgery, Division of Transplantation, Columbia University Medical Center, New York, New York
| | - Matthew Cooper
- MedStar Georgetown Transplant Institute, MedStar Georgetown University Hospital, Washington, District of Columbia
| | - Chirag R. Parikh
- Division of Nephrology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sumit Mohan
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York, New York,The Columbia University Renal Epidemiology (CURE) Group, New York, New York,Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York
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18
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Brennan C, Sandoval PR, Husain SA, King KL, Dube GK, Tsapepas D, Mohan S, Ratner LE. Impact of warm ischemia time on outcomes for kidneys donated after cardiac death Post-KAS. Clin Transplant 2020; 34:e14040. [PMID: 32654278 DOI: 10.1111/ctr.14040] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/26/2020] [Accepted: 07/05/2020] [Indexed: 12/22/2022]
Abstract
Prolonged warm (WIT) and cold (CIT) ischemia times are often important considerations in the discard of DCD kidneys, but their impact on post-transplant outcomes in the post-KAS era is unclear. We examined the association of ischemia time on delayed graft function (DGF) and death-censored graft failure for DCD kidneys. The 2018 SRTR SAF was utilized to identify post-KAS DCD kidney transplants occurring from 2015 to 2018. Relative risk and Cox regression were used to calculate risk of delayed graft function and hazard of death-censored graft failure, respectively. We identified 4,680 kidneys from DCD donors transplanted from 2015 to 2018 with recorded WIT and CIT times. Median WIT was 21.0 minutes (IQR 14.0-28.0), and CIT was 18.5 hours (IQR 13.9-23.5). The overall incidence of DGF was 42.7%. In a univariable relative risk regression model, extended CIT (24-30 hours:RR 1.37, 95% CI 1.15-1.77; >30 hours:RR 1.47, 95% CI 1.22-1.77) and WIT (20-40 minutes:RR 1.10, 95% CI 1.03-1.17) were associated with increased risk of DGF. When included in a multivariable model, neither prolonged CIT nor WIT were significantly associated with death-censored graft failure. Prolonged WIT and CIT are associated with increased DGF but not death-censored graft failure in recipients of DCD kidney transplants in the post-KAS era. Extended ischemia alone should not be used as a basis for discard or non-utilization of these organs.
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Affiliation(s)
- Corey Brennan
- The Columbia University Renal Epidemiology (CURE) Group, New York City, New York, USA.,New York- Presbyterian Hospital, New York City, New York, USA
| | - Pedro Rodrigo Sandoval
- Department of Surgery, Columbia University College of Physicians & Surgeons, New York City, New York, USA
| | - Syed Ali Husain
- The Columbia University Renal Epidemiology (CURE) Group, New York City, New York, USA.,Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York City, New York, USA
| | - Kristen L King
- The Columbia University Renal Epidemiology (CURE) Group, New York City, New York, USA.,Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York City, New York, USA
| | - Geoffrey K Dube
- Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York City, New York, USA
| | - Demetra Tsapepas
- The Columbia University Renal Epidemiology (CURE) Group, New York City, New York, USA.,New York- Presbyterian Hospital, New York City, New York, USA
| | - Sumit Mohan
- The Columbia University Renal Epidemiology (CURE) Group, New York City, New York, USA.,Department of Medicine, Division of Nephrology, Columbia University Medical Center, New York City, New York, USA.,Department of Epidemiology, Columbia University Mailman School of Public Health, New York City, New York, USA
| | - Lloyd E Ratner
- Department of Surgery, Columbia University College of Physicians & Surgeons, New York City, New York, USA
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19
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Tejchman K, Sierocka A, Kotowski M, Zair L, Pilichowska E, Ostrowski M, Sieńko J. Acid-Base Balance Disorders During Kidney Preservation in Cold Ischemia. Transplant Proc 2020; 52:2036-2042. [PMID: 32334797 DOI: 10.1016/j.transproceed.2020.01.099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 01/06/2020] [Accepted: 01/26/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Acid-base balance disorders are a crucial element of ischemia-reperfusion injury during organ transplantation. Hypoxia during organ procurement and storage cause cellular homeostasis imbalance with impact on further graft function. Acidosis in preserved kidney caused by lactate accumulation may have an important role as a common denominator of various pathways leading to cellular damage. METHODS Our trial sought to answer questions regarding a range of pH alterations in the kidney before the transplantation, their potential cause, and how this may affect further outcome of the kidney transplantation procedure. Perfusion fluid for pH analysis was obtained from perfusion pump (PP) or through kidney flushing at the end of preservation depending on the storage method. RESULTS A total of 66 sample results were collated with the data from the transplant registry, hospitalization, and outpatient department. Statistical analysis was conducted linking pH results with factors related to donor, recipient, preservation, and outcome according to designed schematics. Mean perfusate pH was significantly lower in simple hypothermia (SH) vs the PP storage group (6.77 vs 7.11; P < .001). All samples of perfusate pH in the SH group were below physiological values (<7.35), and in 10% of samples in the SH group, pH >7.00. CONCLUSIONS We concluded that kidney storage in cold ischemia is associated with organ acidosis independent of preservation method and that SH is correlated with significantly bigger acidosis than storage in PP, which is an important procedure removing an excessive amount of hydrogen ions from kidney microcirculation, decreasing cell damage.
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Affiliation(s)
- Karol Tejchman
- Department of General and Transplantation Surgery, Pomeranian Medical University, Szczecin, Poland.
| | - Anita Sierocka
- Department of General Mini-invasive and Gastroenterological Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Maciej Kotowski
- Department of General and Transplantation Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Labib Zair
- Department of General and Transplantation Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Ewa Pilichowska
- Department of General and Transplantation Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Marek Ostrowski
- Department of General and Transplantation Surgery, Pomeranian Medical University, Szczecin, Poland
| | - Jerzy Sieńko
- Department of General and Transplantation Surgery, Pomeranian Medical University, Szczecin, Poland
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Utilization of Donor Kidneys With Acute Kidney Injury in Pediatric Kidney Transplant Recipients. Transplantation 2020; 104:597-602. [PMID: 32238780 DOI: 10.1097/tp.0000000000002827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND An elevated terminal creatinine is frequently used as a reason for organ refusal in pediatric kidney transplantation. There is increasing evidence that adults who receive kidneys from donors with moderate to severe acute kidney injury (AKI) have similar outcomes to recipients who receive kidneys from donors with none to mild AKI. METHODS We used the Scientific Registry of Transplant Recipients to determine how many pediatric kidney transplant recipients developed delayed graft function (DGF) between 2000 and 2010. RESULTS When stratified by the donor terminal creatinine, there was no significant difference in the recipient discharge creatinine or the likelihood of developing DGF. In a logistic regression model, older donor age, male donors, and a longer cold ischemia time but not donor terminal creatinine were independent predictors of DGF. There were very few graft loss events documented in this study. CONCLUSIONS Our results are in agreement with previously published data; a high donor terminal creatinine is not significantly associated with DGF in pediatric renal transplant recipients. Additional studies investigating the risk of rejection and long-term graft function are needed before adopting the practice of accepting kidneys with moderate to severe AKI in pediatric kidney transplant recipients.
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Bellini MI, Nozdrin M, Yiu J, Papalois V. Machine Perfusion for Abdominal Organ Preservation: A Systematic Review of Kidney and Liver Human Grafts. J Clin Med 2019; 8:jcm8081221. [PMID: 31443179 PMCID: PMC6723966 DOI: 10.3390/jcm8081221] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/11/2019] [Accepted: 08/12/2019] [Indexed: 12/26/2022] Open
Abstract
Introduction: To match the current organ demand with organ availability from the donor pool, there has been a shift towards acceptance of extended criteria donors (ECD), often associated with longer ischemic times. Novel dynamic preservation techniques as hypothermic or normothermic machine perfusion (MP) are increasingly adopted, particularly for organs from ECDs. In this study, we compared the viability and incidence of reperfusion injury in kidneys and livers preserved with MP versus Static Cold Storage (SCS). Methods: Systematic review and meta-analysis with a search performed between February and March 2019. MEDLINE, EMBASE and Transplant Library were searched via OvidSP. The Cochrane Library and The Cochrane Central Register of Controlled Trials (CENTRAL) were also searched. English language filter was applied. Results: the systematic search generated 10,585 studies, finally leading to a total of 30 papers for meta-analysis of kidneys and livers. Hypothermic MP (HMP) statistically significantly lowered the incidence of primary nonfunction (PMN, p = 0.003) and delayed graft function (DGF, p < 0.00001) in kidneys compared to SCS, but not its duration. No difference was also noted for serum creatinine or eGFR post-transplantation, but overall kidneys preserved with HMP had a significantly longer one-year graft survival (OR: 1.61 95% CI: 1.02 to 2.53, p = 0.04). Differently from kidneys where the graft survival was affected, there was no significant difference in primary non function (PNF) for livers stored using SCS for those preserved by HMP and NMP. Machine perfusion demonstrated superior outcomes in early allograft dysfunction and post transplantation AST levels compared to SCS, but however, only HMP was able to significantly decrease serum bilirubin and biliary stricture incidence compared to SCS. Conclusions: MP improves DGF and one-year graft survival in kidney transplantation; it appears to mitigate early allograft dysfunction in livers, but more studies are needed to prove its potential superiority in relation to PNF in livers.
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Affiliation(s)
| | - Mikhail Nozdrin
- School of Medicine, Imperial College London, London SW72AZ, UK
| | - Janice Yiu
- School of Medicine, University College London, London WC1E 6BT, UK
| | - Vassilios Papalois
- Renal and Transplant Directorate, Imperial College Healthcare NHS Trust, London W120HS, UK
- Department of Surgery and Cancer, Imperial College London, London SW72AZ, UK
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