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1.
Transpl Int ; 36: 10938, 2023.
Article in English | MEDLINE | ID: mdl-37091963

ABSTRACT

Solid Organ Transplant (SOT) recipients are at significant higher risk for COVID-19 and due to immunosuppressive medication, the immunogenicity after vaccination is suboptimal. In the previous studies, booster method showed significant benefit in this population. In the current study, we compared using a mix-and-match method vs. same vaccine as a third dose in SOT recipients. This was a patient-blinded, single center, randomized controlled trial comparing BNT162b2 vs. JNJ-78436735 vaccine as the third dose after two doses of BNT162b2 vaccine. We included adult SOT recipients with functional graft who had received two doses of BNT162b2 vaccine. Participants were randomly assigned to receive either BNT162b2 or JNJ-78436735 in one-to-one ratio. Primary outcome was SARS-CoV-2 IgG positivity at 1 month after the third dose. Sixty SOT recipients, including 36 kidney, 12 liver, 2 lung, 3 heart, and 5 combined transplants, were enrolled, and 57 recipients were analyzed per protocol. There were no statistically significant differences between the two vaccine protocols for IgG positivity (83.3% vs. 85.2% for BNT162b2 and JNJ-78436735, respectively, p = 0.85, Odds Ratio 0.95, 95% Confidence Interval 0.23-4.00). Comparison of the geometric mean titer demonstrated a higher trend with BNT162b2 (p = 0.09). In this pilot randomized controlled trial comparing mix and match method vs. uniform vaccination in SOT recipients, both vaccines were safely used. Since this was a small sample sized study, there was no statistically significant difference in immunogenicity; though, the mix and match method showed relatively lower geometric mean titer, as compared to uniform vaccine. Further studies need to be conducted to determine duration of this immunogenicity. Clinical Trial Registration: https://clinicaltrials.gov/ct2/show/NCT05047640?term=20210641&draw=2&rank=1, identifier 20210641.


Subject(s)
COVID-19 , Organ Transplantation , Vaccines , Adult , Humans , Ad26COVS1 , BNT162 Vaccine , COVID-19/prevention & control , SARS-CoV-2 , Transplant Recipients , Immunoglobulin G , Antibodies, Viral
2.
Transpl Infect Dis ; 25(4): e14071, 2023 Aug.
Article in English | MEDLINE | ID: mdl-37196056

ABSTRACT

BACKGROUND: Cytomegalovirus (CMV) infection is one of the most common posttransplantation infections and has been associated with increased rejection and mortality. Data in intestinal transplants recipients are limited. METHODS: This is a single-center, retrospective cohort study of all intestinal transplants performed between January 1, 2009, and August 31, 2020. We included recipients of all ages who were at risk of CMV infection. To identify the risk factors, we conducted at first univariate and multivariate analysis. For the multivariate analysis, we developed a logistic regression model based on the result of univariate analysis. RESULTS: Ninety five patients with a median age of 32 (interquartile range [IQR] 4, 50) were included. CMV donor seropositive/recipient seronegative were 17 (17.9%). Overall, 22.1% of the recipients developed CMV infection at a median time of 155 (IQR 28-254) days from transplant, including 4 CMV syndrome and 6 CMV end-organ disease. Overall, 90.4%, (19/21) developed DNAemia while on prophylaxis. Median peak viral load and time to negativity was 16 000 (IQR 1034-43 892) IU/mL and 56 (IQR 49-109) days, respectively. (Val)ganciclovir and foscarnet were utilized in 17 (80.9%) and 1 (4.76%) recipients, respectively. Recurrences of CMV DNAemia and graft rejection were observed in three and six recipients, respectively. Younger age was identified as a risk factor (p = .032, odds ratio 0.97, 95% confidence interval 0.95-0.99) to develop CMV DNAemia. CONCLUSION: A significant proportion of intestinal transplant recipients developed CMV infection while on prophylaxis. Better methods such as CMV cell mediated immunity guided prophylaxis should be used to prevent infections in this population.

3.
Transpl Infect Dis ; 24(6): e13923, 2022 Dec.
Article in English | MEDLINE | ID: mdl-35915957

ABSTRACT

Solid organ transplant (SOT) recipients are at high risk for severe disease with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Emerging variants of concern have disproportionately affected this population. Data on severity and outcomes with the Omicron variant in SOT recipients are limited. Thus we conducted this single-center, retrospective cohort study of SOT recipients diagnosed with SARS-CoV-2 infection from December 18, 2021 to January 18, 2022, when prevalence of the Omicron variant was more than 80%-95% in the community. Univariate and multivariate logistic regression analysis was performed to identify risk factors for hospital admission. We identified 166 SOT patients: 112 (67.5%) kidney, 22 (13.3%) liver, 10 (6.0%) lung, seven (4.2%) heart, and 15 (9.0%) combined transplants. SARS-CoV-2 vaccine series was completed in 59 (35.5%) recipients. Ninety-nine (59.6%) and 13 (7.8%) recipients received casirivimab/imdevimab and sotrovimab, respectively. Fifty-three (32%) recipients required hospital admission, of which 19 (35.8%) required intensive care unit level of care. Median follow-up was 50 (interquartile range, 25-59) days, with mortality reported in six (3.6%) patients. Risk factors identified for hospital admission were African American race (p < .001, odds ratio [OR] 4.00, 95% confidence interval [CI] 1.84-8.70), history of coronary artery disease (p = .031, OR 3.50, 95% CI 1.12-10.87), and maintenance immunosuppression with corticosteroids (p = .048, OR 2.00, 95% CI 1.01-4.00). In conclusion, contrary to that in the general population, we found a higher hospital admission rate in SOT recipients with omicron variant infection. Further studies to investigate the efficacy of newer treatments are necessary, even as outcomes continue to improve.


Subject(s)
COVID-19 , Organ Transplantation , Humans , COVID-19/epidemiology , COVID-19 Vaccines , Retrospective Studies , SARS-CoV-2 , Organ Transplantation/adverse effects , Transplant Recipients
4.
Ann Surg ; 274(6): e1284-e1289, 2021 12 01.
Article in English | MEDLINE | ID: mdl-31939750

ABSTRACT

INTRODUCTION: Complexity of combined heart-liver transplantation has resulted in low adoption rates. We report a case series of adult patients receiving en-bloc heart-liver transplantation (HLTx), describe technical aspects, and discuss benefits of the technique. METHODS: Retrospective review of patients receiving en-bloc HLTx over 18 months, with clinical follow up to 1 year. Primary outcomes included postoperative mortality and major complications. Secondary outcomes included 1-year survival, cardiac or hepatic allograft rejection, and infection. RESULTS: Five patients received en-bloc HLTx. Mean recipient age was 43 years (26-63), and 3 patients were male. Total operative time was 430 minutes (393-480), cold and warm ischemic times of 85 (32-136) and 37.5 (31-47) minutes. Hospital survival was 80%. One patient died on postoperative day 55 due to fungal sepsis. Major postoperative complications included prolonged mechanical ventilation in 2 of 5 patients (40%), and renal insufficiency requiring hemodialysis in 2 of 5 patients (40%). Among patients discharged from hospital 1-year survival was 100%, with no evidence of rejection or infectious complications. CONCLUSION: En-bloc HLTx technique is a safe and effective strategy, decreasing operative times, and allograft ischemic times, whereas offering protection of implanted allografts during early stages of reperfusion while patient is hemodynamically supported on cardiopulmonary bypass.


Subject(s)
Heart Failure/surgery , Heart Transplantation , Liver Failure/surgery , Liver Transplantation , Adult , Female , Heart Failure/complications , Heart Transplantation/adverse effects , Heart Transplantation/methods , Humans , Liver Failure/complications , Liver Transplantation/adverse effects , Liver Transplantation/methods , Male , Middle Aged , Retrospective Studies
5.
Ann Surg ; 274(3): 473-480, 2021 09 01.
Article in English | MEDLINE | ID: mdl-34238812

ABSTRACT

OBJECTIVE: Pig-to-primate renal xenotransplantation is plagued by early antibody-mediated graft loss which precludes clinical application of renal xenotransplantation. We evaluated whether temporary complement inhibition with anti-C5 antibody Tesidolumab could minimize the impact of early antibody-mediated rejection in rhesus monkeys receiving pig kidneys receiving costimulatory blockade-based immunosuppression. METHODS: Double (Gal and Sda) and triple xenoantigen (Gal, Sda, and SLA I) pigs were created using CRISPR/Cas. Kidneys from DKO and TKO pigs were transplanted into rhesus monkeys that had the least reactive crossmatches. Recipients received anti-C5 antibody weekly for 70 days, and T cell depletion, anti-CD154, mycophenolic acid, and steroids as baseline immunosuppression (n = 7). Control recipients did not receive anti-C5 therapy (n = 10). RESULTS: Temporary anti-C5 therapy reduced early graft loss secondary to antibody-mediated rejection and improved graft survival (P < 0.01). Deleting class I MHC (SLA I) in donor pigs did not ameliorate early antibody-mediated rejection (table). Anti-C5 therapy did not allow for the use of tacrolimus instead of anti-CD154 (table), prolonging survival to a maximum of 62 days. CONCLUSION: Inhibition of the C5 complement subunit prolongs renal xenotransplant survival in a pig to non-human primate model.


Subject(s)
Antibodies, Monoclonal, Humanized/pharmacology , Antibodies, Monoclonal/pharmacology , Graft Rejection/immunology , Graft Rejection/prevention & control , Immunosuppressive Agents/pharmacology , Kidney Transplantation , Transplantation, Heterologous , Animals , Animals, Genetically Modified , Antibiotic Prophylaxis , Immune Tolerance , Macaca mulatta , Models, Animal , Rituximab/pharmacology , Swine , Tacrolimus/pharmacology
6.
Clin Transplant ; 35(12): e14370, 2021 12.
Article in English | MEDLINE | ID: mdl-34032328

ABSTRACT

BACKGROUND: The Coronavirus disease 2019(COVID-19) pandemic has negatively impacted worldwide organ transplantation. However, there is limited information on recipients transplanted after SARS-CoV-2 infection. A full understanding of this scenario is required, as transplantation is a life-saving procedure and COVID-19 remains an ongoing threat. METHODS: Abdominal organ transplant recipients diagnosed with COVID-19 prior to transplantation were identified by chart review and clinical data were collected. The primary outcome was the transplant outcome including graft loss, rejection and death, and reactivation of infection post-transplant. RESULTS: We identified 14 patients who received abdominal organ transplants after symptomatic PCR confirmed SARS-CoV-2 infection; four patients had a positive PCR at the time of admission for transplantation. The median time of follow-up was 79 (22-190) days. One recipient with negative PCR before transplant tested positive 9 days after transplant. One of 14 transplanted patients developed disseminated mold infection and died 86 days after transplant. During the follow-up, only one patient developed rejection; thirteen patients had favorable graft outcomes. CONCLUSIONS: We were able to perform abdominal transplantation for patients with COVID-19 before transplant, even with positive PCR at the time of transplant. Larger studies are needed to determine the time to safe transplant after SARS-CoV-2 infection.


Subject(s)
COVID-19 , Kidney Transplantation , Hospitalization , Humans , SARS-CoV-2 , Transplant Recipients
7.
Surg Innov ; 28(4): 403-408, 2021 Aug.
Article in English | MEDLINE | ID: mdl-33393426

ABSTRACT

Objectives. Endoscopic gastrostomy occasionally presents limitations such as costs, availability of equipment and special materials, and difficult access to the gastric cavity in the setting of obstructive esophageal tumors. Open jejunostomies present high rates of postoperative complications and limited capacity for abdominal evaluation due to reduced incision size. Thus, to reduce procedure-related complications and overall costs and provide a thorough intraoperative evaluation of the peritoneal cavity, we present the following simplified technique. Methods. Video-assisted jejunostomy in ten steps. Results. The use of this Video-assisted laparoscopic technique proves to be a safe, viable alternative, with cost reduction, decreased use of disposable materials, shortened operative time, and accelerated recovery, in addition to increased technical ease and wide applicability across a variety of hospital settings.


Subject(s)
Esophageal Neoplasms , Laparoscopy , Enteral Nutrition , Esophageal Neoplasms/surgery , Gastrostomy , Humans , Jejunostomy
8.
Pediatr Transplant ; 24(1): e13621, 2020 02.
Article in English | MEDLINE | ID: mdl-31815352

ABSTRACT

Clostridium difficile infection (CDI) is the most common health care-associated infection in the United States. Thirty-nine percent of intestinal transplant recipients may develop CDI. Induction of rejection has been reported as a rare event. To our knowledge, this will be the second report of an association between CDI and rejection in the literature. We describe our experience with four pediatric MVT recipients, three of whom on treatment of their CDI alone had resolution of biopsy findings of intestinal ACR. Our patients were males aged 2-5 years old who had their first CDI post-MVT occurring from 2 months to 15 months post-transplant. All first episodes of CDI were treated with a 10-14 day course of metronidazole with one additionally receiving vancomycin. All four recipients had recurrent CDI, and two recipients had septic shock as a manifestation of their CDI. Three recipients had biopsies showing mild rejection during episodes of CDI, and treatment of the CDI resulted in resolution of biopsy findings of rejection. Our case series suggests CDI may mimic ACR on intestinal biopsy. Treatment of rejection during active CDI carries the risk of over-suppression and worsening of CDI. Our experience has taught us that surveillance endoscopy for rejection may be deceiving during an active CDI, and if mild acute rejection is noted during active CDI, treatment of rejection can be safely delayed and potentially avoided.


Subject(s)
Clostridioides difficile , Clostridium Infections/diagnosis , Graft Rejection/diagnosis , Intestines/transplantation , Postoperative Complications/diagnosis , Biopsy , Child , Child, Preschool , Clostridioides difficile/isolation & purification , Clostridium Infections/etiology , Diagnosis, Differential , Humans , Intestines/microbiology , Intestines/pathology , Liver Transplantation , Male , Pancreas Transplantation , Recurrence , Stomach/transplantation
9.
Artif Organs ; 43(6): 599-604, 2019 Jun.
Article in English | MEDLINE | ID: mdl-30431163

ABSTRACT

Extracorporeal removal of carbon dioxide in patients experiencing severe hypercapnia due to lung protective mechanical ventilation was first described over four decades ago. There have been many devices developed and described in the interim, many of which require additional training, resources, and staff. This manuscript describes a readily available and relatively simple adjunct that can provide partial lung support in patients with acute respiratory distress syndrome complicated by severe hypercapnia and acute kidney injury requiring dialysis.


Subject(s)
Acute Kidney Injury/therapy , Carbon Dioxide/isolation & purification , Hypercapnia/therapy , Respiratory Distress Syndrome/therapy , Acute Kidney Injury/complications , Adult , Extracorporeal Membrane Oxygenation/methods , Female , Humans , Hypercapnia/complications , Male , Middle Aged , Renal Dialysis/methods , Respiratory Distress Syndrome/complications , Ventilators, Mechanical/adverse effects
10.
Gastroenterol Clin North Am ; 53(2): 299-308, 2024 06.
Article in English | MEDLINE | ID: mdl-38719380

ABSTRACT

As we all acknowledge benefits of ostomies, they can come with significant morbidity, quality of life issues, and major complications, especially during reversal procedures. In recent years, we have started to observe that similar graft and patient survival can be achieved without ostomies in certain cases. This observation and practice adopted in a few large-volume transplant centers opened a new discussion about the necessity of ostomies in intestinal transplantation. There is still more time and randomized studies will be needed to better understand and analyze the risk/benefits of "No-ostomy" approach in intestinal transplantation.


Subject(s)
Intestines , Humans , Intestines/transplantation , Surgical Stomas , Graft Survival , Postoperative Complications/etiology , Quality of Life , Enterostomy
11.
Front Immunol ; 15: 1354101, 2024.
Article in English | MEDLINE | ID: mdl-38495894

ABSTRACT

Beyond the direct benefit that a transplanted organ provides to an individual recipient, the study of the transplant process has the potential to create a better understanding of the pathogenesis, etiology, progression and possible therapy for recurrence of disease after transplantation while at the same time providing insight into the original disease. Specific examples of this include: 1) recurrence of focal segmental glomerulosclerosis (FSGS) after kidney transplantation, 2) recurrent autoimmunity after pancreas transplantation, and 3) recurrence of disease after orthotopic liver transplantation (OLT) for cirrhosis related to progressive steatosis secondary to jejuno-ileal bypass (JIB) surgery. Our team has been studying these phenomena and their immunologic underpinnings, and we suggest that expanding the concept to other pathologic processes and/or transplanted organs that harbor the risk for recurrent disease may provide novel insight into the pathogenesis of a host of other disease processes that lead to organ failure.


Subject(s)
Glomerulosclerosis, Focal Segmental , Kidney Failure, Chronic , Kidney Transplantation , Transplants , Humans , Neoplasm Recurrence, Local/complications , Kidney Transplantation/adverse effects , Kidney Failure, Chronic/etiology
12.
Cancer ; 118(12): 3191-8, 2012 Jun 15.
Article in English | MEDLINE | ID: mdl-22025126

ABSTRACT

BACKGROUND: Hepatocellular carcinoma (HCC) is increasing in incidence due to hepatitis C. Stereotactic body radiotherapy (SBRT) is a noninvasive, effective therapy in the management of liver malignancies. The authors evaluated radiological response in 26 patients with HCC treated with SBRT at Indiana University. METHODS: Between March 2005 and June 2008, 26 patients with HCC who were not surgical candidates were enrolled in a phase 1 to 2 trial. Eligibility criteria included solitary tumors ≤ 6 cm or up to 3 lesions with sum diameters ≤ 6 cm, and well-compensated cirrhosis. All patients had imaging before, at 1 to 3 months, and every 3 to 6 months after SBRT. RESULTS: Patients received 3 to 5 fractions of SBRT. Median SBRT dose was 42 Gray (Gy) (range: 24-48 Gy). Median follow-up was 13 months. Per Response Evaluation Criteria in Solid Tumors (RECIST), 4 patients had a complete response (CR), 15 had a partial response (PR), and 7 achieved stable disease (SD) at 12 months. One patient with SD experienced progression marginal to the treated area. The overall best response rate (CR + PR) was 73%. In comparison, by European Association for the Study of the Liver (EASL) criteria, 18 of 26 patients had ≥ 50% nonenhancement at 12 months. Thirteen of 18 demonstrated 100% nonenhancement, being > 50% in 5 patients. Kaplan-Meier 1- and 2-year survival estimates were 77% and 60%, respectively. CONCLUSIONS: SBRT is effective therapy for patients with HCC with an overall best response rate (CR + PR) of 73%. Nonenhancement on imaging, a surrogate for ablation, may be a more useful indicator than size reduction in evaluating HCC response to SBRT in the first 6 to 12 months, supporting EASL criteria.


Subject(s)
Carcinoma, Hepatocellular/surgery , Liver Neoplasms/surgery , Radiosurgery , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Treatment Outcome , Young Adult
13.
Ann Surg ; 255(6): 1144-50, 2012 Jun.
Article in English | MEDLINE | ID: mdl-22549750

ABSTRACT

OBJECTIVE: To evaluate the clinical outcomes of multivisceral transplantation (MVT) in the setting of diffuse thrombosis of the portomesenteric venous system. BACKGROUND: Liver transplantation (LT) in the face of cirrhosis and diffuse portomesenteric thrombosis (PMT) is controversial and contraindicated in many transplant centers. LT using alternative techniques such as portocaval hemitransposition fails to eliminate complications of portal hypertension. MVT replaces the liver and the thrombosed portomesenteric system. METHODS: A database of intestinal transplant patients was maintained with prospective analysis of outcomes. The diagnosis of diffuse PMT was established with dual-phase abdominal computed tomography or magnetic resonance imaging with venous reconstruction. RESULTS: Twenty-five patients with grade IV PMT received 25 MVT. Eleven patients underwent simultaneous cadaveric kidney transplantation. Biopsy-proven acute cellular rejection was noted in 5 recipients, which was treated successfully. With a median follow-up of 2.8 years, patient and graft survival were 80%, 72%, and 72% at 1, 3, and 5 years, respectively. To date, all survivors have good graft function without any signs of residual/recurrent features of portal hypertension. CONCLUSIONS: MVT can be considered as an option for the treatment of patients with diffuse PMT. MVT is the only procedure that completely reverses portal hypertension and addresses the primary disease while achieving superior survival results in comparison to the alternative options.


Subject(s)
Mesenteric Veins , Organ Transplantation , Portal Vein , Thrombosis/surgery , Viscera/transplantation , Adult , Child , Child, Preschool , Databases, Factual , Female , Humans , Male , Middle Aged , Retrospective Studies , Thrombectomy
14.
Liver Transpl ; 18(7): 786-95, 2012 Jul.
Article in English | MEDLINE | ID: mdl-22237953

ABSTRACT

Rabbit anti-thymocyte globulin (rATG)-based immunosuppression induction is being increasingly used in liver transplantation (LT) in conjunction with steroid-free protocols to delay the initiation of calcineurin inhibitors. This study reports a single-center comparison of transplant outcomes and complications in 3 immunosuppression eras. Data were obtained retrospectively from a center research database, and the analysis included LT patients from 2001 to 2008. The immunosuppression consisted of rATG induction in 3 doses (6 mg/kg in all): (1) the first dose was administered perioperatively [the rabbit anti-thymocyte globulin in the operating room (rATG-OR) era]; (2) the first dose was delayed until 48 hours after transplantation [the rabbit anti-thymocyte globulin after a delay (rATG-D) era]; or (3) the first dose was delayed until 48 hours after transplantation, and a single dose of rituximab was added 72 hours after transplantation [the rabbit anti-thymocyte globulin after a delay plus rituximab (rATG-D-Ritux) era]. The initial maintenance immunosuppression was tacrolimus monotherapy, which was started on postoperative day 2. There were 166 patients (16%) in the rATG-OR era, 259 patients (26%) in the rATG-D era, and 588 patients (58%) in the rATG-D-Ritux era (1013 patients in all). Demographically, the latter eras were characterized by higher recipient and donor ages; greater percentages of liver-kidney transplants, hepatocellular carcinoma (HCC), donation after cardiac death (DCD), and imported organs; and shorter graft ischemia times. There were no significant differences between the 3 immunosuppression groups in unadjusted patient survival 3 and 5 years after transplantation (80% and 75% for the rATG-OR era, 75% and 67% for the rATG-D era, and 79% and 71% for the rATG-D-Ritux era, P = 0.15). The 5-year survival rates for patients with hepatitis C virus (HCV) and HCC were 65% and 68%, respectively. The factors included in the Cox regression model for patient death included the Model for End-Stage Liver Disease score [hazard ratio (HR) = 1.03, P = 0.001], HCV (HR = 1.28, P = 0.04), donor age (HR = 1.01, P = 0.001), recipient age (HR = 1.01, P = 0.05), and DCD (HR = 1.55, P = 0.11). rATG-based induction immunosuppression can be safely used in adult LT recipients with excellent survival and low rejection rates and without increases in immunosuppression-related side effects.


Subject(s)
Antibodies, Monoclonal, Murine-Derived/pharmacology , Antilymphocyte Serum/therapeutic use , Immunologic Factors/therapeutic use , Immunosuppressive Agents/therapeutic use , Liver Transplantation/methods , Adult , Aged , Animals , Female , Follow-Up Studies , Humans , Male , Middle Aged , Rabbits , Retrospective Studies , Rituximab , Steroids/metabolism , Treatment Outcome
15.
Pediatr Transplant ; 16(7): 788-95, 2012 Nov.
Article in English | MEDLINE | ID: mdl-22835086

ABSTRACT

This study reviews the post-operative management of pediatric intestinal transplant patients at a single center with reporting of standard PICU benchmarks for quality of care. It is a retrospective, descriptive, chart review describing our institution's experience between 2006 and 2010. Twenty patients were included. Median age at transplant was 1.6 yr. Median length of PICU stay was 12 days. Median ventilation time was two days. Median time for continuous sedation infusion was two days, with median continuous pain medication infusion of three days. All patients were placed on parental nutrition and started on enteral feedings between days 3 and 4. Forty percent of patients required hemodynamic support. Only 35% of patients required insulin therapy. Diuretics were frequently used in this patient population. There were no episodes of early rejection. The survival rate to PICU discharge was 95%. Our institution's experience over the past four yr has been very successful with a short duration of mechanical ventilation, limited use of pain and sedation drips, early initiation of enteral feedings, minimal hemodynamic support, and a low mortality rate to PICU discharge despite a preponderance of complex MVTx recipients.


Subject(s)
Critical Care/methods , Intestines/transplantation , Adolescent , Child , Child, Preschool , Female , Hemodynamics , Humans , Infant , Intensive Care Units, Pediatric , Male , Pain Management , Pediatrics/methods , Postoperative Period , Respiration, Artificial , Retrospective Studies , Time Factors , Treatment Outcome
16.
Transplant Rev (Orlando) ; 36(1): 100678, 2022 01.
Article in English | MEDLINE | ID: mdl-35090785

ABSTRACT

BACKGROUND: Neuroendocrine tumors (NET) have an increasing incidence and are characterized by an invasive and metastatic presentation, rendering a curative resection not always feasible. For some patients the only life-saving option would be a multivisceral transplantation (MvTx). This systematic review aims to summarize the reported experience on combined liver-intestinal and MvTx for NET according PRISMA-guidelines. METHODS: PubMed, EMBASE and Cochrane Controlled Trial Reports were searched until April 7, 2020. Structured data abstraction was performed, and methodological quality assessed. RESULTS: Fourteen single-center and three multicenter retrospective studies reported on 1 combined liver-intestinal and 38 MvTx for NET. Nine previously unreported MvTx were added to the analysis. This review found that: i) overall patient survival of 51.2% is attainable; ii) recurrence of 35% is similar to recurrence after liver transplantation for NET; and iii) NET with diffuse abdominal presentation, normally considered a contraindication, could actually benefit from radical resection and MvTx. Data on tailoring of immunosuppression and (neo-)adjuvant treatment are limited, and further studies are needed to optimize post-transplant management. CONCLUSIONS: Although results are encouraging, the reported MvTx experience for NET is limited and requires more detailed prospective multicenter studies and appropriate follow-up and reporting.


Subject(s)
Liver Transplantation , Neuroendocrine Tumors , Humans , Liver , Liver Transplantation/methods , Multicenter Studies as Topic , Neuroendocrine Tumors/surgery , Prospective Studies , Retrospective Studies
17.
Transplantation ; 104(12): 2538-2546, 2020 12.
Article in English | MEDLINE | ID: mdl-33215900

ABSTRACT

BACKGROUND: The aging of liver transplant (LT) recipients, the weighting of the model for end-stage liver disease score, and the increased prevalence of nonalcoholic steatohepatitis has led to an increased number of older LT recipients with pre-LT chronic kidney disease (CKD). There are limited data on the impact of increased recipient age on post-simultaneous liver-kidney (SLK) transplant outcomes among patients with CKD, leading some centers to employ subjective age cutoffs for potential SLK recipients. METHODS: We evaluated United Network for Organ Sharing data of adult SLK recipients from February 27, 2002, to December 31, 2018, restricted to recipients with ≥90 days of waiting time and CKD (estimated glomerular filtration rate persistently <60 mL/min/1.73 m2 for ≥90 d using the modification of diet in renal disease-4 equation). We fit mixed-effects Cox regression models (center as random effect) to evaluate the association of recipient age and patient survival. RESULTS: Among 3146 SLK recipients with CKD, nearly two-thirds were 50-64 years of age, while 465 (14.8%) and 93 (3.0%) were 65-69 years and ≥70 years, respectively. Compared with nondiabetic SLK recipients aged 50-59 years, SLK recipients ≥70 years of age without diabetes (hazard ratio, 1.97; 95% CI, 1.20-3.23; P = 0.007) and with diabetes (hazard ratio, 1.90; 95% CI, 1.16-3.09; P = 0.01) had higher mortality compared with the reference group. In absolute terms, SLK recipients ≥70 years of age had 25% lower patient survival at 5 years compared to recipients aged 40-49 years. CONCLUSIONS: Although careful selection is required of any SLK recipient, especially those with increased comorbidities, there are no objective data to justify a specific age cutoff <70 years among potential SLK recipients with CKD.


Subject(s)
Kidney Transplantation , Liver Failure/surgery , Liver Transplantation , Renal Insufficiency, Chronic/surgery , Age Factors , Aged , Clinical Decision-Making , Comorbidity , Female , Humans , Kidney Transplantation/adverse effects , Liver Failure/diagnosis , Liver Failure/epidemiology , Liver Transplantation/adverse effects , Male , Middle Aged , Patient Selection , Renal Insufficiency, Chronic/diagnosis , Renal Insufficiency, Chronic/epidemiology , Risk Assessment , Risk Factors , Treatment Outcome , United States/epidemiology
18.
Liver Transpl ; 15(6): 640-7, 2009 Jun.
Article in English | MEDLINE | ID: mdl-19479808

ABSTRACT

In the United States, liver allograft allocation is strictly regulated. Local centers have the first option to accept a donor liver; this is followed by regional allocation for those donor livers not used locally and then by national allocation for those donor livers not accepted regionally. This study reviews the outcomes of all liver allografts used over 6 years (2001-2007) and evaluates initial and long-term function stratified by the geographic source of the donor liver allograft. The records for 845 consecutive deceased donor liver transplants at a single center were reviewed. The geographic origin of the allograft was recorded along with donor and graft characteristics to determine the probable reason for graft refusal. Within our local organ procurement organization, there is 1 liver transplant center, and within the region, there are 8 active centers. Early graft failure included any graft loss within 7 days of transplant, and initial function was measured with liver enzymes 30 days post-transplant. Graft survival and patient survival were evaluated with Kaplan-Meier and Cox survival modeling. Median follow-up was 43 months. The geographic distribution of organs included local organs (562, 66%), regionally imported organs (126, 15%), and nationally imported organs (157, 19%). There were no differences between the 3 groups in initial graft function, intraoperative death, or early graft loss. Survival curves for the 3 study groups demonstrated no difference in survival up to 5 years post-transplant. In conclusion, liver allografts rejected for use by a large number of transplant centers can still be successfully used without early graft function or long-term survival being affected.


Subject(s)
Graft Rejection/epidemiology , Liver Transplantation/statistics & numerical data , Tissue and Organ Procurement/methods , Tissue and Organ Procurement/statistics & numerical data , Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Female , Humans , Kaplan-Meier Estimate , Liver/enzymology , Liver/physiology , Liver Transplantation/mortality , Liver Transplantation/physiology , Male , Middle Aged , Outcome Assessment, Health Care , Retrospective Studies , Risk Factors , Tissue and Organ Procurement/legislation & jurisprudence , Transplantation, Homologous , United States , Young Adult
19.
Curr Opin Clin Nutr Metab Care ; 12(3): 281-6, 2009 May.
Article in English | MEDLINE | ID: mdl-19357509

ABSTRACT

PURPOSE OF REVIEW: This article reviews the most current indications, technical aspects and results of intestinal and multivisceral transplantation. RECENT FINDINGS: The introduction of induction therapy in the past 8 years, combined with advancements on surgical technique and clinical management, was vital for the improvement in patient and graft survival. SUMMARY: Intestinal transplantation is now a viable option for patients with intestinal failure who have failed parenteral nutrition. The improvement in the survival of intestinal and multivisceral transplant recipients has extended its use to selected patients with neoplastic disease, extensive splanchnic thrombosis and abdominal catastrophes.


Subject(s)
Intestinal Diseases/surgery , Intestines/transplantation , Parenteral Nutrition/adverse effects , Graft Survival , Humans , Immunosuppression Therapy , Intestine, Small/transplantation , Liver Transplantation , Pancreas Transplantation , Transplantation, Homologous/mortality
20.
Clin Transplant ; 23(6): 784-7, 2009.
Article in English | MEDLINE | ID: mdl-20447184

ABSTRACT

Modified multivisceral (MMV) transplantation including the stomach, pancreaticoduodenal complex and intestine requires preservation of the left gastric and splenic arteries. The previously described techniques require division of the hepatic artery proximal to the gastroduodenal artery leaving the liver transplant team with a very short and small caliber vessel. To increase MMV graft availability and provide the liver transplant team with an appropriate quality vessel, we developed the following technique. We also describe two cases where we used this method to support the technical feasibility of this procedure.


Subject(s)
Colon/transplantation , Liver Transplantation/methods , Liver/blood supply , Pancreas Transplantation/methods , Stomach/transplantation , Tissue and Organ Procurement/methods , Vascular Surgical Procedures/methods , Adult , Anastomosis, Surgical/methods , Child , Colon/blood supply , Female , Follow-Up Studies , Graft Survival , Humans , Male , Middle Aged , Stomach/blood supply , Tissue Donors , Young Adult
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