The use of expanded criteria cadaver and live donor kidneys for transplantation

Influence of Sudden Cardiac Arrest in Deceased Kidney Donors on Organ Function After Transplantation

INTRODUCTION

Due to the increasing number of organ recipients, expanded criteria donors (ECD) are qualified for transplantation, including donors after sudden cardiac arrest (SCA). The aim of this study was to evaluate the influence of SCA on kidney function immediately after transplantation.

PATIENTS AND METHODS

The analysis includes 186 kidney recipients, mean age 49 years (19-74), who were transplanted between January 2014 to July 2015. In 44 cases, kidneys were retrieved from donors after SCA (23.6%). Delayed graft function (DGF) was recognized if the patient needed at least one hemodialysis after the kidney transplant. Acute rejection (AR) was confirmed by biopsy.

RESULTS

Sixty-five (34.9%) patients presented with DGF, 14 of them received kidneys from donors after SCA (31.8% of the SCA group), and 51 of them are from donors without SCA (35.9% of the non-SCA group). Eleven AR episodes were observed in the first month, including 4 cases in the SCA group. The study revealed no influence of donors' SCA on the frequency of DGF and AR or high creatine level after transplantation. The differences between both groups were not significant (P > .05).

CONCLUSIONS

SCA episodes in donors during ICU treatment before organ retrieval had no influence on immediate kidney function after kidney transplant. There is no correlation between SCA and episodes of DGF or AR. SCA donors should be considered as standard criteria donors.

Ex-vivo partial nephrectomy after living donor nephrectomy: Surgical technique for expanding kidney donor pool

Renal transplantation has profound improvements in mortality, morbidity, and overall quality of life compared to renal replacement therapy. This report aims to illustrate the use of ex-vivo partial nephrectomy in a patient with a renal angiomyolipoma prior to living donor transplantation. The surgical outcomes of the donor nephrectomy and recipient transplantation are reported with 2 years of follow-up. Both the donor and recipient are healthy and without any significant comorbidities. In conclusion, urologic techniques such as partial nephrectomy can be used to expand the living donor pool in carefully selected and well informed transplant recipients. Our experience demonstrated a safe and positive outcome for both the recipient and donor, and is consistent with other reported outcomes in the literature.

Variables during Care of Adult Donors That Can Influence Outcomes of Kidney Transplantation

Publications that relate characteristics of donors to renal function of recipients are reviewed. Most publications report retrospective observations that relate outcomes to donor variables that cannot be altered during donor care. Factors that can be altered in adult donors in an effort to improve recipients' outcomes include urine output and creatinine level. Increasing urine output to more than 100 mL/h, at least during the hour before explantation, and returning the creatinine level to match its serum concentration when the patient was admitted can improve outcomes. Ways of accomplishing those goals during donor care are discussed, with emphasis on support of renal blood flow.

Effect of cell permeable peptide of c-Jun NH2-terminal kinase inhibitor on the attenuation of renal ischemia-reperfusion injury in pigs

The outcomes of organ transplantation have improved due to better immunosuppressive drugs, surgical techniques, and management of complications. However, ischemia-reperfusion injury remains a challenge affecting graft survival. In this study, we employed injection of a protein transduction domain (PTD) to inhibit the c-Jun NH2-terminal kinase (JNK) pathway thereby attenuating ischemia-reperfusion injury in a porcine model. The PTD-JNK inhibitor (JNKI) was administered into the renal artery, allowing it to be taken into various elements including vascular endothelial cells by endocytosis via the PTD. Serum creatinine and blood urea nitrogen concentrations were lower among PTD-JNKI than controls. In addition, renal tissue blood flow was maintained in the PTD-JNKI group, resulting in less tissue injury and fewer apoptotic cells. These results suggested that the PTD technique improved renal transplantation outcomes.

Emerging trends in infections among renal transplant recipients

Outcomes following renal and simultaneous kidney-pancreas transplants have improved significantly due to better surgical techniques and improved modalities of antirejection therapy. However, infection remains a significant cause of morbidity and mortality. The use of new modalities of immunosuppression and routine use of antimicrobial prophylaxis has changed the pattern of infections post-transplantation. Cytomegalovirus remains a significant problem and BK virus has emerged as an important pathogen. New antimicrobial agents are now available to treat infection, however, antimicrobial resistance remains a concern.

Racial disparities in urologic health care

In the United States, disparities in health care delivery and access are apparent between different racial and ethnic groups. Minorities, including African Americans, often suffer disproportionately from disease compared to Caucasians. In the urologic arena, this is apparent in urologic cancer screening, treatment choices, and survival, as well as in the arena of chronic kidney disease, transplant allocation, and transplant outcomes. Latino men also seem to be affected more often by erectile dysfunction than Caucasian counterparts. Disparities such as these have been identified as a problem in the delivery of health care in the United States, and resources have been allocated to help allay the disparity. Through organizations such as the Cleveland Clinic Minority Men's Health Center, policy initiatives, and increased cultural awareness by physicians, steps can be made to reduce and eliminate health care disparities.

[Renal live donor. Open and laparoscopic experience at La Paz Hospital]

Laparoscopic live donor nephrectomy is a rare operation in our country because the complexity of the technique and the expansion of the cadaveric donor. We present our open and laparoscopic live donor nephrectomy from 1984.

MATERIAL AND METHODS

From 1984 to 2007 we have done 84 live donor nephrectomies; 64 open, 20 laparoscopic surgeries. The transperitoneal approach is preferred in laparoscopy and lumbotomy for the open surgery.

RESULTS

In the open technique the operating time is 112 min (70-155), ischaemia time 20 seconds (15-47) and postoperative hospital stay 4,8 days (3-9). Laparoscopic cases, the operating time is 146 min (90-210), ischaemia time 3 min 15 sec (2-3, 25 min) and postoperative hospital stay 3,4 days (2-9).

CONCLUSIONS

The laparoscopic live donor nephrectomy is a difficult and demanding technique. It should be done by experienced team in laparoscopic renal surgery. The kidney from a live donor is a very good alternative for the cronic renal failure. It should be offered in our main hospitals.

Comparison of Graft Survival in Live Donor Nephrectomy: Hand-Assisted Laparoscopic v Open Procedures

PURPOSE

Laparoscopic donor nephrectomy is associated with decreased morbidity while maintaining similar graft function in short-term follow-up compared with open surgery. We investigated hand-assisted laparoscopic donor nephrectomy (HALDN) in comparison with standard open donor nephrectomy (ODN) in living donors.

PATIENTS AND METHODS

Two hundred patients who received a living-donor kidney and were followed up for more than 1 year were enrolled. The procedure was performed exclusively on the left kidney through either HALDN or ODN from January 2001 to July 2004. The probability of graft survival was determined using the Kaplan-Meier method. Multivariate analysis using a Cox regression hazard model was performed to identify the predictors of graft survival.

RESULTS

The mean operative time, estimated blood loss, warm ischemic time, and operation-related complications were compared. There was no difference in graft function. The cumulative graft survival at 1 and 3 years was similar in the two groups: 98% and 97%. Episodes of acute rejection were an independent predictor of graft survival.

CONCLUSIONS

Hand-assisted laparoscopic nephrectomy in living donors is safe and effective with results similar to those of open nephrectomy with regard to graft function.

Ageism and kidney transplantation

The growing shortage of deceased-donor kidneys and the rapid growth in the number of patients with end-stage renal failure aged 65 years and older is impacting the current policies for allocation of allografts. The utilitarian and egalitarian philosophies may clash in times of limited resources. Organ transplantation can be viewed as a microcosm concerning healthcare issues facing an aging population and limited resources. The limited resources in organ transplantation are not merely financial. The limits on supply of deceased-donor organs will force the transplant community to deal with allocation issues before the more general population faces other limits in health care. Our discussions may clarify some of the problems.

Kidney transplantation using elderly non-heart-beating donors: a single-center experience

Although acceptable outcomes have been reported in both non-heart-beating (NHB) and elderly donors individually, the large pool of elderly NHB donors has not yet been fully utilized. In 1994, we expanded our transplant protocol to include NHB donors aged over 65 years and this study compares the clinical outcomes with regular NHB transplantations. Up to June 2005, 24 patients were transplanted at our center with kidneys from NHB donors aged 65 years or more, whereas 176 patients received grafts from conventional NHB donors during the same period. Grafts from older donors were associated with inferior glomerular filtration rates (29 vs. 44 mL/min after 1 year, p=0.01) and graft survival (52% vs. 68% after 5 years, p=0.19) compared to younger NHB donor grafts, although the difference in graft survival was not statistically significant. Exclusion of older NHB donor kidneys with severe vascular pathology resulted in similar graft survival of older and younger NHB donor kidneys. We conclude that the use of elderly NHB donors in order to expand the donor pool was associated with unacceptable clinical outcomes and cannot be justified without further refinement in their selection, for example, by histological assessment of pretransplant biopsies.

A Systematic Review of Laparoscopic Live-Donor Nephrectomy

BACKGROUND

A systematic review was undertaken to assess the safety and efficacy of laparoscopic live-donor nephrectomy (LLDN) compared with open live-donor nephrectomy (OLDN).

METHODS

Literature databases were searched from inception to March 2003 inclusive. Comparative studies of LLDN versus OLDN (randomized and nonrandomized) were included.

RESULTS

There were 44 included studies, and the quality of the available evidence was average. There was only one randomized controlled trial and six nonrandomized comparative studies with concurrent controls identified. In terms of safety, for donors, there did not seem to be any distinct difference between the laparoscopic and open approaches. No donor mortality was reported for either procedure, and the complication rates were similar although the types of complications experienced differed between the two procedures. The conversion rate for LLDN to an open procedure ranged from 0% to 13%. In terms of efficacy, LLDN seemed to be a slower operation with longer warm ischemia times than OLDN, but this did not seem to have resulted in increased rates of delayed graft function for recipients. Donor postoperative recovery and convalescence seemed to be superior for LLDN, making it a potentially more attractive operation for living donors. Although in the short-term, graft function and survival did not seem to differ between the two techniques, long-term complication rates and allograft function could not be determined and further long-term follow-up is required.

CONCLUSIONS

LLDN seems to be at least as safe and efficacious as OLDN in the short-term. However, it remains a technique in evolution. Further high-quality studies are required to resolve some of the outstanding issues surrounding its use, in particular, long-term follow-up of donor complications and recipient graft function and survival.

Factors associated with (un)willingness to be an organ donor: importance of public exposure and knowledge

BACKGROUND

Transplantation is increasingly limited by the supply of donor organs. Identifying subgroups that do not support organ donation will allow targeted efforts to increase organ donation.

METHODS

A total of 185 non-acutely ill outpatients visiting a community physician's office voluntarily completed a survey designed to capture views and general knowledge/misconceptions about cadaveric organ donation/transplantation.

RESULTS

Of 185 patients, 86 were willing to donate, 42 were unwilling, and 57 were unsure. Willingness to donate was significantly associated with: having discussed the topic with family; having known a cadaveric organ donor; age 55 yr; having graduated high school; recognizing the organ shortage as the primary problem in transplantation; having received a post-high school degree; having seen public information within 30 d; and having a family member in health care (all p</=0.05). Not significant were: gender; race; religious affiliation or regular church attendance; knowing a transplant recipient or wait-listed patient; and having easy internet access. Those unwilling/unsure more often thought: organ allocation is based on race/income; organ donation is expensive for the donor family; designated donors may not receive full emergency room care; a brain-dead person can recover.

CONCLUSIONS

Intense efforts to improve public awareness and knowledge about organ donation/transplantation are necessary to maximize donation and the overall success of transplantation.

Prognostic significance of microvascular thrombosis in donor kidney allograft biopsies

BACKGROUND

With a continuing demand for donor kidneys for organ transplantation, it is important to understand the significance of pathologic findings in the donor organ before transplantation. Microvascular thrombosis is sometimes encountered in association with disseminated intravascular coagulation in the donor, and it is unclear whether this finding may affect immediate allograft function and long-term graft survival. To further elucidate this question, we examined our experience with microvascular thrombosis in donor biopsies in the kidney transplant program at our institution.

METHODS

Donor kidney biopsies showing microvascular thrombosis were identified from consecutive donor biopsies in the Duke University Medical Center transplant file database between January 1, 1995 and December 31, 2000. These biopsies and all other kidney biopsies and specimens from the recipients of these kidneys thus identified were reviewed. Sections were stained using a variety of methods, including hematoxylin-eosin, periodic acid-Schiff, methenamine silver, and Masson trichrome methods. Clinical records of the transplant recipients of these kidneys were also reviewed to assess allograft performance and survival.

RESULTS

From 230 consecutive donor kidney biopsies, we identified eight cases exhibiting donor-microvascular thrombosis. Mean follow-up times were 27.5 months for the thrombi group and 35 months for the non-thrombi group. Recipients of grafts with donor thrombi were more likely to exhibit delayed graft function, but graft function at 1 and 2 years and graft survival were similar between the two groups. Subsequent posttransplantation biopsies in five of eight cases showed no evidence of residual thrombosis.

CONCLUSIONS

These data suggest that the presence of donor microvascular thrombosis does not portend poor outcome in renal transplantation.

The use of apheresis in immune renal disorders

Rapidly progressive glomerulonephritis (RPGN) is often associated with the presence of autoantibodies. Included in this group are the glomerulonephritides associated with anti-GBM antibody (Goodpasture's syndrome). IgA mesangial deposition (the renal component of Henoch-Schönlein purpura), lupus erythematosus, cryoglobulinemia and the antineutrophil cytoplasmic antibody (ANCA)-associated pauci-immune group. In each of these cases, apheresis may provide a therapeutically useful option. Apheresis has also been found useful in certain types of antibody-mediated transplant rejection and in lowering the levels of preformed cytotoxic antibodies which may preclude transplantation. Finally, there are renal diseases in which the immune component is less clearly involved with pathogenesis but for which apheresis may offer a clear benefit, such as in the renal failure associated with 'cast nephropathy' (multiple myeloma) or the recurrence of FSGS (focal segmental glomerulosclerosis) in transplanted kidneys. It is the purpose of this paper to review the evidence supporting the use of apheresis in immune-related diseases.