RESUMEN
The First World Consensus Conference on Pancreas Transplantation provided 49 jury deliberations regarding the impact of pancreas transplantation on the treatment of diabetic patients, and 110 experts' recommendations for the practice of pancreas transplantation. The main message from this consensus conference is that both simultaneous pancreas-kidney transplantation (SPK) and pancreas transplantation alone can improve long-term patient survival, and all types of pancreas transplantation dramatically improve the quality of life of recipients. Pancreas transplantation may also improve the course of chronic complications of diabetes, depending on their severity. Therefore, the advantages of pancreas transplantation appear to clearly surpass potential disadvantages. Pancreas after kidney transplantation increases the risk of mortality only in the early period after transplantation, but is associated with improved life expectancy thereafter. Additionally, preemptive SPK, when compared to SPK performed in patients undergoing dialysis, appears to be associated with improved outcomes. Time on dialysis has negative prognostic implications in SPK recipients. Increased long-term survival, improvement in the course of diabetic complications, and amelioration of quality of life justify preferential allocation of kidney grafts to SPK recipients. Audience discussions and live voting are available online at the following URL address: http://mediaeventi.unipi.it/category/1st-world-consensus-conference-of-pancreas-transplantation/246.
Asunto(s)
Diabetes Mellitus Tipo 1 , Trasplante de Riñón , Trasplante de Páncreas , Supervivencia de Injerto , Humanos , Calidad de Vida , Diálisis RenalRESUMEN
BACKGROUND: Recently, it has been shown that panniculectomy concurrent to living donor renal transplantation is a safe option for management of renal transplant recipients with a large focal pannus. This combined management requires precise coordination of teams. We describe the technique, timing, and sequence for combined renal transplantation and panniculectomy. METHODS: We conducted a retrospective chart review of adult patients (≥18 years old) who underwent simultaneous living donor renal transplantation-panniculectomy from 2015 to 2019. A multi-team approach that included urology, transplant, and plastic surgery was used to perform the combined operations. Typically, the plastic surgery team initiates the operation by performing the panniculectomy. This is followed by kidney transplantation and graft anastomosis. The plastic surgery team then completes the operation with closure of the wound. RESULTS: Twenty patients were identified. Most were male (12:8) with a mean age of 55 years and an average body mass index of 35 kg/m. The mean total operative duration was 394 minutes. On average, 17% of operating time was devoted to panniculectomy. At 90 days follow-up, there was 100% graft survival and all patients had primary graft function. There was a 25% wound complications rate and a 15% reoperation rate. CONCLUSION: By performing panniculectomy first in the sequence, concurrent panniculectomy provides wide exposure and a large operative field for transplantation. Wound closure by plastic surgeons may mitigate the high complication rate commonly seen in obese patients with end-stage renal disease. Future studies are needed to evaluate the cost-benefit of the combined living donor renal transplantation-panniculectomy.
Asunto(s)
Abdominoplastia , Trasplante de Riñón , Lipectomía , Adolescente , Adulto , Femenino , Humanos , Donadores Vivos , Masculino , Persona de Mediana Edad , Estudios RetrospectivosRESUMEN
Panniculectomy can be performed as a prophylactic procedure preceding transplantation to enable obese patients to meet criteria for renal transplantation. No literature exists on combined renal transplant and panniculectomy surgery (LRT-PAN). We describe our 8-year experience performing LRT-PAN. A retrospective chart review of all patients who had undergone LRT-PAN from 2010 to 2018 was conducted. Data were collected on patient demographics, allograft survival and function, and postoperative course. Fifty-eight patients underwent LRT-PAN. All grafts survived, with acceptable function at 1 year. Median length of stay was 4 days with a mean operative duration of 363 minutes. The wound complication rate was 24%. Ninety-day readmission rate was 52%, with medical causes as the most common reason for readmission (45%), followed by wound (32%) and graft-related complications (23%). Body mass index, diabetes status, and previous immunosuppression did not influence wound complication rate or readmission (P = .7720, P = .0818, and P = .4830, respectively). Combining living donor renal transplant and panniculectomy using a multidisciplinary team may improve access to transplantation, particularly for the obese and postobese population. This combined approach yielded shorter-than-expected hospital stays and similar wound complication rates, and thus should be considered for patients in whom transplantation might otherwise be withheld on the basis of obesity.
Asunto(s)
Abdominoplastia/métodos , Fallo Renal Crónico/cirugía , Trasplante de Riñón/métodos , Donadores Vivos/provisión & distribución , Obesidad/cirugía , Complicaciones Posoperatorias , Cuidados Preoperatorios , Adulto , Anciano , Índice de Masa Corporal , Femenino , Estudios de Seguimiento , Tasa de Filtración Glomerular , Humanos , Fallo Renal Crónico/complicaciones , Pruebas de Función Renal , Masculino , Persona de Mediana Edad , Obesidad/complicaciones , Pronóstico , Estudios Retrospectivos , Factores de Riesgo , Adulto JovenRESUMEN
BACKGROUND: The benefits of pancreas transplantation are often difficult to measure. Here, we sought to determine the difference in quality of life for diabetic patients with and without a functional pancreas transplant alone (PTA). METHODS: Pancreas transplant alone cases from 1993 to 2015 were considered. An IRB-approved survey inclusive of 15 questions spanning four domains was employed. Chi-square, Fisher's exact, and the T test were used where appropriate. RESULTS: A total of 137 PTAs were performed during the study period. Of those reached (n = 32), 94% responded to the survey. Self-reported health scores were better (2.1 vs 3.0) for those with functioning pancreata (n = 18) vs those with a non-functional pancreas (n = 14), respectively (P = .036). Those with a functional pancreas had a HgbA1c of 5.3, vs 7.7 for a non-functional pancreas (P = .016). Significant hypoglycemia was reported in two of 18 with a functional transplant vs nine of 14 patients with a failed transplant (P = .003). Daily frustration with blood sugar affecting quality of life was significantly higher for patients with non-functional pancreas grafts (P < .001). CONCLUSIONS: Pancreas transplantation alone is associated with better glucose control than insulin. In addition, recipients of functional PTAs have improved quality of life and better overall health scores than those with failed grafts.
Asunto(s)
Glucosa/metabolismo , Supervivencia de Injerto , Hospitales de Alto Volumen/estadística & datos numéricos , Hiperglucemia/prevención & control , Hipoglucemia/prevención & control , Trasplante de Páncreas/métodos , Calidad de Vida , Adulto , Femenino , Estudios de Seguimiento , Estado de Salud , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Adulto JovenRESUMEN
BACKGROUND: Protease inhibitors (PI) pose a challenge post-transplant due to significant drug interactions with calcineurin inhibitors, prompting many clinicians to convert patients to non-interacting regimens prior to transplant. The purpose of this study was to examine the impact of PI-based regimens on graft outcomes in HIV-infected renal transplant recipients. METHODS: In this retrospective cohort study, 50 HIV-infected renal allograft recipients (27 receiving a PI regimen, 23 receiving a non-PI regimen) transplanted between 2003-2015 were analyzed. RESULTS: Cumulative rejection rates at 12 and 36 months were 41% and 54% in the PI group vs 52% and 86% in the non-PI group. At last follow-up, the overall risk of acute rejection in the PI group was 46% lower compared with the non-PI cohort (P = 0.12). Patients who received a PI-based regimen had significantly reduced graft failure rates (P = 0.027). There was no difference between groups in the degree of interstitial fibrosis/tubular atrophy, arteriolar hyalinosis, arterial sclerosis, or glomerular sclerosis on available biopsies, despite longer follow-up time in the PI group. CONCLUSIONS: Our study suggests that PI-based antiretroviral therapy regimens are associated with improved graft survival and that patients can achieve adequate outcomes on a PI-based regimen when necessary. Due to study limitations, further studies are needed to determine the optimal immunosuppression/antiretroviral therapy regimen post-transplant.
Asunto(s)
Rechazo de Injerto/epidemiología , Infecciones por VIH/tratamiento farmacológico , Inhibidores de la Proteasa del VIH/farmacología , VIH/aislamiento & purificación , Trasplante de Riñón/efectos adversos , Adulto , Aloinjertos/patología , Biopsia , Inhibidores de la Calcineurina/farmacología , Inhibidores de la Calcineurina/uso terapéutico , Interacciones Farmacológicas , Femenino , Estudios de Seguimiento , Rechazo de Injerto/patología , Rechazo de Injerto/prevención & control , Supervivencia de Injerto/efectos de los fármacos , Infecciones por VIH/virología , Inhibidores de la Proteasa del VIH/uso terapéutico , Humanos , Terapia de Inmunosupresión/métodos , Inmunosupresores/farmacología , Inmunosupresores/uso terapéutico , Riñón/patología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
BACKGROUND DATA: Patients with severe acute liver failure (ALF) have extreme physiologic dysfunction and often die if transplantation is not immediately available. Patients may be supported with MARS (Baxter International Inc., Deerfield, IL) until transplantation or spontaneous recovery occurs. We present the largest series in the United States of MARS therapy as temporary hepatic replacement for ALF. METHODS: MARS was used to support patients with severe liver trauma (SLT), in ALF patients as a bridge to transplantation (BTT), and as definitive therapy for toxic ingestion or idiopathic liver failure (DT) in a level 1 trauma center and large transplant center. Patient demographics, etiology of ALF, and laboratory values were recorded. Endpoints were patient survival ± liver transplant and/or recovery of liver function. RESULTS: Twenty-seven patients with severe ALF received MARS therapy. Five patients with SLT had a 60% survival with recovery of liver and renal function. Thirteen patients received MARS as a BTT, of which 9 were transplanted with a 1-year survival of 78% (program overall survival 85% at 1 year). All 4 who were not transplanted expired. Nine patients with ALF from toxic ingestion received MARS as DT with liver recovery and survival in 67%. MARS therapy resulted in significant improvement in liver function, coagulation, incidence of encephalopathy, and creatinine. CONCLUSIONS: MARS therapy successfully replaced hepatic function in ALF allowing time for spontaneous recovery or transplantation. Spontaneous recovery was remarkably common if support can be sustained.
Asunto(s)
Fallo Hepático Agudo/terapia , Hígado Artificial , Desintoxicación por Sorción , Humanos , Hígado/lesiones , Fallo Hepático Agudo/etiología , Fallo Hepático Agudo/cirugía , Trasplante de Hígado , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
BACKGROUND: Lecithin cholesterol acyl transferase (LCAT) deficiency is a rare autosomal recessive disorder of lipoprotein metabolism that results in end-stage renal disease (ESRD) necessitating transplantation. As LCAT is produced in the liver, combined kidney and liver transplantation was proposed to cure the clinical syndrome of LCAT deficiency. METHODS: A 29-year-old male with ESRD secondary to LCAT deficiency underwent a sequential kidney-liver transplantation from the same living donor (LD). One year following the kidney transplant, auxiliary partial orthotopic liver transplant (APOLT) of a left lateral segment from the same donor was performed. RESULTS: At 5 years follow-up, there have been no major complications, readmissions, or rejection episodes. Serum lipid abnormalities recurred within the first year, but liver and kidney allograft function remains intact. CONCLUSION: Few cases of sequential transplantation from the same LD have been performed in adults. This is the first APOLT and multi-organ transplant performed for LCAT deficiency. Sequential organ transplant from the same LD for ESRD secondary to a metabolic disorder of the liver is feasible in adults and should be further investigated.
Asunto(s)
Fallo Renal Crónico/cirugía , Trasplante de Riñón/métodos , Deficiencia de la Lecitina Colesterol Aciltransferasa/cirugía , Trasplante de Hígado/métodos , Donadores Vivos , Adulto , Femenino , Humanos , Fallo Renal Crónico/etiología , Deficiencia de la Lecitina Colesterol Aciltransferasa/complicaciones , MasculinoRESUMEN
OBJECTIVE: Minimally invasive techniques have expanded the donor pool for living kidney donation. We changed our approach to single-port donor nephrectomy in 2009 and have compared outcomes with traditional multiple-port laparoscopic donor nephrectomy. BACKGROUND: The development of minimally invasive surgical techniques to procure kidneys from living donors has allowed expansion of living donor renal transplantation to account for one third of all renal transplants. Recent technical advancement allows for the entire surgical procedure to be done through a single incision contained within the umbilicus. METHODS: We compared outcomes from 135 single-port donor nephrectomies with an immediately preceding cohort of 100 multiple-port laparoscopic donor nephrectomies. Survey data were collected from both groups to compare outcomes. Additional comparisons were made to total center experience with 1300 laparoscopic donor nephrectomies. RESULTS: A total of 135 patients completed successful single-port donor nephrectomy without major complication or open conversion. Another 16 patients required additional port placement because of excessive intra-abdominal fat or limited abdominal domain. Compared with multiple-port donor nephrectomy, single-port patients had similar operative times to cross clamp (2.8 vs 2.6 hours; P = 0.11) that normalized after a learning curve of approximately 50 cases. Recipient creatinine levels were similar at 1 week and 1 month posttransplant. Although 36-Item Short Form Health Surveys demonstrated no significant differences, additional survey data revealed that single-port patients were more satisfied with cosmetic outcomes (P < 0.01) and the overall donation process (P = 0.01). Single-port approach had similar outcomes compared with all previous laparoscopic donor nephrectomies. CONCLUSIONS: Single-port donor nephrectomy can be integrated as a standardized approach for renal donation without additional donor risk, and with benefits of improved patient satisfaction with cosmetic and overall outcomes. Although the primary benefit is cosmetic, (a single incision predominantly contained within the umbilicus) outcomes justify application for kidney donors in experienced centers and may motivate additional living kidney donation.
Asunto(s)
Laparoscopios , Laparoscopía/métodos , Donadores Vivos , Nefrectomía/métodos , Satisfacción del Paciente , Recolección de Tejidos y Órganos/instrumentación , Adulto , Diseño de Equipo , Femenino , Humanos , Trasplante de Riñón/métodos , Masculino , Estudios RetrospectivosRESUMEN
Autosomal dominant polycystic kidney disease is a cause of end-stage renal disease associated with abdominal aortic aneurysms. We report a patient with autosomal dominant polycystic kidney disease who received an allograft kidney and subsequently underwent treatment of an abdominal aortic aneurysm with aortic ligation and axillary-bifemoral bypass. After years of graft function, bypass thrombosis resulted in dialysis-dependent renal failure. Aortobifemoral bypass resulted in immediate restoration of allograft function despite 6 months of prior renal failure. Aortic reconstruction restored renal function to a hibernating allograft long after clinical graft failure from arterial ischemia, a phenomenon not previously reported in the literature.
Asunto(s)
Aneurisma de la Aorta Abdominal/cirugía , Implantación de Prótesis Vascular/efectos adversos , Oclusión de Injerto Vascular/cirugía , Fallo Renal Crónico/cirugía , Trasplante de Riñón/efectos adversos , Riñón Poliquístico Autosómico Dominante/cirugía , Insuficiencia Renal/cirugía , Terapia Recuperativa , Trombosis/cirugía , Aneurisma de la Aorta Abdominal/etiología , Circulación Colateral , Oclusión de Injerto Vascular/diagnóstico por imagen , Oclusión de Injerto Vascular/etiología , Oclusión de Injerto Vascular/fisiopatología , Humanos , Fallo Renal Crónico/etiología , Masculino , Persona de Mediana Edad , Riñón Poliquístico Autosómico Dominante/complicaciones , Circulación Renal , Diálisis Renal , Insuficiencia Renal/diagnóstico por imagen , Insuficiencia Renal/etiología , Insuficiencia Renal/fisiopatología , Reoperación , Trombosis/diagnóstico por imagen , Trombosis/etiología , Trombosis/fisiopatología , Tomografía Computarizada por Rayos X , Insuficiencia del TratamientoRESUMEN
Monitoring pancreas transplant recipients for rejection is an inexact science. Serial monitoring of urinary amylase has been used for patients with a bladder-drained pancreas. An increase in serum amylase and lipase has been utilized as an in vivo measure of pancreas rejection in patients with enteric pancreatic exocrine drainage. Decreases in urinary amylase or increases in serum amylase or lipase, respectively, in these two different types of surgical drainage would prompt a pancreas biopsy for histologic confirmation of rejection. Herein, we describe the case of an enteric-drained pancreatic transplant recipient who presented with peripheral eosinophilia at least one month before she developed increases in serum amylase and lipase. A pancreas allograft biopsy indicated eosinophilic acute cellular rejection. Peripheral eosinophilia may be a useful early indicator of pancreas graft rejection preceding changes in serum pancreatic enzymes by approximately one month.
Asunto(s)
Eosinofilia , Rechazo de Injerto/diagnóstico , Trasplante de Páncreas , Adulto , Amilasas/análisis , Diagnóstico Precoz , Eosinófilos/patología , Femenino , Rechazo de Injerto/patología , Humanos , Lipasa/análisis , Páncreas/patologíaRESUMEN
BACKGROUND: Clinical vascularized composite allografts (VCA), although performed with good success, have been characterized by rejection episodes and postoperative graft edema. We investigated lymphatic donor-recipient reconstitution and lymphatic regeneration in a nonhuman primate facial VCA model. METHODS: Heterotopic partial face (n = 9) VCAs were performed in cynomolgus macaques. Grafts were monitored for rejection episodes and response to immunosuppressive therapies as previously described. Donor and recipient lymphatic channels were evaluated using a near-infrared handheld dual-channel light-emitting diode camera system capable of detecting fluorescence from indocyanine green injections. Graft lymphatic channels were serially evaluated from postoperative day 0 to 364. RESULTS: Preoperative imaging demonstrated superficial lymphatic anatomy similar to human anatomy. Initial resolution of facial allograft swelling coincided with superficial donor-recipient lymphatic channel reconstitution. Reconstitution occurred despite early acute rejection episodes in 2 animals. However, lymphatic channels demonstrated persistent functional and anatomic pathology, and graft edema never fully resolved. No differences in lymphatic channels were noted between grafts that developed transplant vasculopathy (n = 3) and those that did not (n = 6). Dynamic changes in patterns of lymphatic drainage were noted in 4 animals following withdrawal of immunosuppression. CONCLUSIONS: Donor-recipient lymphatic channel regeneration following VCA did not result in resolution of edema. Technical causes of graft edema may be overcome with alternative surgical techniques, allowing for direct investigation of the immunologic relationship between VCA graft edema and rejection responses. Mechanisms and timing of dynamic donor-recipient lymphatic channel relationships can be evaluated using fluorescent imaging systems to better define the immunologic role of lymphatic channels in VCA engraftment and rejection responses, which may have direct clinical implications.
Asunto(s)
Cara/irrigación sanguínea , Cara/cirugía , Rechazo de Injerto/diagnóstico , Vasos Linfáticos/fisiología , Vasos Linfáticos/trasplante , Fotograbar/métodos , Regeneración , Animales , Diagnóstico por Imagen , Fluorescencia , Supervivencia de Injerto , Macaca fascicularis , Trasplante HomólogoRESUMEN
BACKGROUND: Solid organ transplantation in elderly patients has become more common in recent years. An increasing number of patients present with renal failure requiring transplantation and comorbid occlusive or aneurysmal aortic pathology. The optimal strategy for the timing and management of the aortic disease and renal transplantation in these patients is unknown. Before the availability of endovascular therapies, our policy was to provide open repair of aortic disease before cadaveric transplantation, or by simultaneous aortic reconstruction with renal allotransplantation if a living donor was available. Since the wide acceptance of endovascular modalities, our strategy has changed to take advantage of endovascular treatment pre-transplant. This study examines the outcome of both approaches. METHODS: We performed a retrospective review of 12 patients between 1996 and 2009 who underwent both renal transplantation and a major abdominal aortic procedure either simultaneously (n = 6), metachronous, with the procedures occurring within the same month (n = 2), or distant, with the aortic procedures occurring between 5 and 24 months before or after transplantation (n = 4). All patients with occlusive disease underwent an aortobifemoral bypass, one before transplant, one subsequent to transplantation, and four simultaneous with a renal allograft. To assess renal transplant status, patients' serum creatinine levels were followed up every 3 months. Of the 12 patients, eight underwent open aortic procedures, whereas four underwent endovascular aortic aneurysm repair. Patients who underwent endovascular aortic aneurysm repair were followed up with ultrasound examinations at 6-month intervals, and with contrast computed tomography scans every other year. RESULTS: Aortic reconstruction was performed successfully in all the 12 patients irrespective of timing strategy. All the patients who underwent endovascular repair had functional renal allografts for the duration of follow-up. Two patients had simultaneous aortobifemoral bypass and pancreas-kidney transplantation without complication. Among the patients with open aortic repairs, there was one 5-year mortality and one patient had failure of two renal allografts. None of the patients had limb loss, and aortic grafts (one limb required a secondary procedure) remained patent. The 5-year patient survival of 90% and kidney survival of 75% appeared similar to results in the general transplant population without aortic disease. Two significant complications related to the open procedures were observed: two renal transplants developed postoperative hematomas requiring evacuation and one aortobifemoral bypass (ABF) developed a femoral wound infection requiring evacuation and sartorius flap closure. The 30-day mortality rate in all patients was zero. The length of stay for patients receiving simultaneous procedures ranged from 5 to 14 days (median, 10.5) and was significantly lower than the 10-52-day (median, 18) combined length of stay in the metachronous and/or distant groups (p = 0.016). CONCLUSION: The coexistence of aortic disease and renal transplantation is an increasingly common clinical scenario. Exclusion from transplantation of patients with major aortoiliac disease is commonplace in many transplant centers as early registry data suggested a poor outcome. Appropriate planning with a vascular surgical team can lead to outcomes, which are comparable with the general transplant population without significant aortic disease.
Asunto(s)
Enfermedades de la Aorta/cirugía , Procedimientos Endovasculares , Trasplante de Riñón , Insuficiencia Renal/cirugía , Procedimientos Quirúrgicos Vasculares , Adulto , Anciano , Aneurisma de la Aorta/diagnóstico , Aneurisma de la Aorta/mortalidad , Aneurisma de la Aorta/cirugía , Enfermedades de la Aorta/diagnóstico , Enfermedades de la Aorta/mortalidad , Aortografía/métodos , Baltimore , Biomarcadores/sangre , Comorbilidad , Creatinina/sangre , Procedimientos Endovasculares/efectos adversos , Procedimientos Endovasculares/mortalidad , Femenino , Supervivencia de Injerto , Humanos , Estimación de Kaplan-Meier , Trasplante de Riñón/efectos adversos , Trasplante de Riñón/mortalidad , Tiempo de Internación , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/etiología , Complicaciones Posoperatorias/terapia , Insuficiencia Renal/diagnóstico , Insuficiencia Renal/mortalidad , Estudios Retrospectivos , Medición de Riesgo , Factores de Riesgo , Tasa de Supervivencia , Factores de Tiempo , Tomografía Computarizada por Rayos X , Resultado del Tratamiento , Procedimientos Quirúrgicos Vasculares/efectos adversos , Procedimientos Quirúrgicos Vasculares/mortalidadRESUMEN
BACKGROUND: Patients with obesity and end-stage renal disease represent a surgical population with multiple comorbidities and high risk for postoperative complications. One method for reducing the incidence of postoperative adverse events in this patient population is to limit the number of operations through combining operations into 1 operative encounter. METHODS: We conducted a retrospective review of adult patients at a single institution who underwent renal transplant, panniculectomy, and at least 1 additional abdominal or pelvic surgery concurrently. For those patients, we collected demographics, intraoperative variables, and postoperative data and analyzed surgical outcomes and postoperative complications. RESULTS: Thirteen patients met inclusion criteria. Most of the patients were female (85%) with ages ranging 33 to 70 years old and mean body mass index of 36.5 (SD 4.7). Three quarters of patients (77%) underwent 3 procedures and the remaining underwent 4 or 5 procedures with a median hospital length of stay of 5 days (range, 3-10 days). There was a single mortality. Overall, 8 patients (61.5%) experienced complications in the first 90 postoperative days. The wound complication rate was 46.2%, the overall readmission rate within 90 days was 38.5%, and the reoperation rate was 30.8%. All patients experienced immediate graft function, and the 12 patients that survived to postoperative day 90 maintained survival at 1 year. CONCLUSION: This study demonstrates that the combination of more than 2 surgical procedures with living donor renal transplant is a possible treatment option in high-risk obese patients in need of multiple operations.
Asunto(s)
Abdominoplastia/métodos , Procedimientos Quirúrgicos del Sistema Digestivo/métodos , Trasplante de Riñón/métodos , Obesidad/complicaciones , Procedimientos Quirúrgicos Urológicos/métodos , Adulto , Anciano , Índice de Masa Corporal , Comorbilidad , Femenino , Humanos , Incidencia , Donadores Vivos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/etiología , Estudios RetrospectivosRESUMEN
BACKGROUND: Perioperative cardiac xenograft dysfunction (PCXD) was described by McGregor and colleagues as a major barrier to the translation of heterotopic cardiac xenotransplantation into the orthotopic position. It is characterized by graft dysfunction in the absence of rejection within 24 to 48 hours of transplantation. We describe our experience with PCXD at a single program. METHODS: Orthotopic transplantation of genetically engineered pig hearts was performed in 6 healthy baboons. The immunosuppression regimen included induction by anti-CD20 monoclonal antibodies (mAb), thymoglobulin, cobra venom factor, and anti-CD40 mAb, and maintenance with anti-CD40 mAb, mycophenolate mofetil, and tapering doses of steroids. Telemetry was used to assess graft function. Extracorporeal membrane oxygenation was used to support 1 recipient. A full human clinical transplantation team was involved in these experiments and the procedure was performed by skilled transplantation surgeons. RESULTS: A maximal survival of 40 hours was achieved in these experiments. The surgical procedures were uneventful, and all hearts were weaned from cardiopulmonary bypass without issue. Support with inotropes and vasopressors was generally required after separation from cardiopulmonary bypass. The cardiac xenografts performed well immediately, but within the first several hours they required increasing support and ultimately resulted in arrest despite maximal interventions. All hearts were explanted immediately; histology showed no signs of rejection. CONCLUSIONS: Despite excellent surgical technique, uneventful weaning from cardiopulmonary bypass, and adequate initial function, orthotopic cardiac xenografts slowly fail within 24 to 48 hours without evidence of rejection. Modification of preservation techniques and minimizing donor organ ischemic time may be able to ameliorate PCXD.
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Rechazo de Injerto/fisiopatología , Trasplante de Corazón/efectos adversos , Terapia de Inmunosupresión/métodos , Inmunosupresores/uso terapéutico , Animales , Biopsia , Modelos Animales de Enfermedad , Femenino , Rechazo de Injerto/diagnóstico , Rechazo de Injerto/tratamiento farmacológico , Supervivencia de Injerto , Masculino , Papio , Periodo Perioperatorio , Porcinos , Trasplante HeterólogoRESUMEN
OBJECTIVE: To critically evaluate an initial experience with small-incision mitral valve operation with respect to safety, durability, and effectiveness. SUMMARY BACKGROUND DATA: Mitral valve (MV) surgery is dominated by a sternotomy approach, with MV repair rates which average 60%. Advantages of valvular repair compared with replacement include lower operative and long-term mortality, decreased stroke and infection risks, and superior freedom from reoperation and complications of anticoagulation. METHODS: Right chest small-incision MV surgery was performed on 187 consecutive patients. Outcomes including operative mortality and major morbidity were recorded. All patients underwent predismissal echocardiography in a core laboratory. RESULTS: Between 2003 and 2008, 57% (187/327) of isolated MV operations were performed using an anterolateral 6 cm 4th intercostal space small-incision. Operative techniques included femoral arterial and venous plus internal jugular cannulation and direct aortic cross-clamping. Pathology of the anterior leaflet was present in 22%, and PTFE neochordal repairs were used in 36% of cases. The rate of MV repair was 96.3% (180/187) and was 100% for patients with degenerative disease. Median cardiopulmonary bypass and aortic cross-clamp times were 108 and 82 minutes, respectively. There were no deaths, strokes, renal failure, or wound infections. Two patients (1.1%) were re-explored for bleeding, and 27% received blood transfusions. The median hospital stay was 4 days. Clinical core laboratory-assessed freedom from significant (MR > mild) at hospital discharge was 99%. Survival at a median follow-up of 2.5 years was 99%. CONCLUSIONS: Direct visualization of the mitral valve through a right chest small-incision enables safe and effective performance of complex MV repair, with repair rates in excess of 95%.
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Procedimientos Quirúrgicos Cardíacos/métodos , Enfermedades de las Válvulas Cardíacas/cirugía , Válvula Mitral/cirugía , Evaluación de Procesos y Resultados en Atención de Salud , Adulto , Anciano , Anciano de 80 o más Años , Puente Cardiopulmonar , Ecocardiografía Doppler , Femenino , Humanos , Masculino , Persona de Mediana Edad , Complicaciones PosoperatoriasRESUMEN
OBJECTIVE: We evaluated a large single center experience of endograft repair of blunt traumatic injury of the thoracic aorta. SUMMARY BACKGROUND DATA: Traumatic aortic transection is a devastating injury with high morbidity and mortality. Endograft repair of these injuries has reduced the rates of death and paraplegia seen with open surgical treatment in the past. However, endograft repair has been associated with a higher incidence of device related failure. METHODS: The records of 43 consecutive cases of endograft treatment of traumatic aortic injury from December 2004 to November 2008 were reviewed. Patient demographics, procedure details, and outcomes were recorded. Aortic morphology was analyzed for predictors of device failure. RESULTS: Forty-three patients (32 men) with a mean age of 44 years (range: 17-88) were treated. Primary technical success was 86%. Six proximal endoleaks (14.3%) occurred. Two were repaired with a more proximal cuff, but 3 required explantation and open repair (7%). Mortality in this series was 11.6%, but no death was aorta related. No patient having endograft treatment suffered postoperative paraplegia. Early device failure is associated with sharp angulation of the aorta and shortened distance between the left subclavian artery and the site of injury. Follow-up ranged from 1 to 38 months (mean: 7.4 months). There were no late device failures or complications. CONCLUSIONS: Endovascular repair of blunt traumatic aortic injury can be performed with a low morbidity and mortality. Anatomic patterns in the aortic arch appear to be predictive of early device failure. Midterm durability is excellent, but reliable follow-up remains challenging in this group of patients.
Asunto(s)
Aorta Torácica/lesiones , Aorta Torácica/cirugía , Implantación de Prótesis Vascular/métodos , Prótesis Vascular , Heridas no Penetrantes/cirugía , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Angiografía , Aorta Torácica/diagnóstico por imagen , Femenino , Humanos , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias/mortalidad , Falla de Prótesis , Estudios Retrospectivos , Tasa de Supervivencia , Tomografía Computarizada por Rayos X , Resultado del Tratamiento , Heridas no Penetrantes/diagnóstico por imagen , Heridas no Penetrantes/mortalidadRESUMEN
OBJECTIVES: To assess transplantation of high-risk kidneys with incidental renal masses (found occasionally during the routine evaluation of a living kidney donor) into recipients with limited life-expectancy on haemodialysis, as this offers a potential solution to the current organ deficit. PATIENTS AND METHODS: We detected five small (<2.3 cm), incidental, enhancing renal masses during donor evaluation. All patients had a standard metastatic evaluation. After laparoscopic donor nephrectomy a back-table partial nephrectomy was performed and frozen-section analysis was used to confirm both the diagnosis and negative surgical margins before transplantation. RESULTS: Renal cell carcinoma was found in three of the five masses (one each cystic, clear cell and papillary; Fuhrman grades II, II and III, respectively) and the other two patients had angiomyolipoma. There were no long-term complications in the transplanted kidneys. One patient developed delayed acute humoral rejection after transplantation and was treated appropriately. Both donor and recipient were followed with periodic imaging. At a median (range) last follow-up of 15 (1-41) months, four patients were alive and one had died from complications after a fall. The cancer-specific survival was 100%. There was no evidence of local recurrence in any patient at the last follow-up. CONCLUSION: Live donor kidneys with incidental small renal masses might be acceptable for transplantation in high-risk recipients after careful back-table partial nephrectomy.
Asunto(s)
Carcinoma de Células Renales/cirugía , Fallo Renal Crónico/cirugía , Neoplasias Renales/cirugía , Trasplante de Riñón/métodos , Donadores Vivos , Nefrectomía/métodos , Adulto , Anciano , Angiomiolipoma/cirugía , Niño , Femenino , Humanos , Hallazgos Incidentales , Esperanza de Vida , Masculino , Persona de Mediana Edad , Resultado del TratamientoRESUMEN
BACKGROUND: Despite the benefits of live donor kidney transplantation (LDKT) over deceased donor kidney transplantation, patients hesitate to pursue this option. METHODS: A total of 324 transplant-eligible haemodialysis patients attending 14 dialysis facilities in Maryland, Northern Virginia and Southern Pennsylvania were asked about their stages of readiness to pursue LDKT, attitudes towards LKDT and demographics. Logistic regressions were used to test the effect of patients' attitudes and demographics on their stages of readiness to pursue LDKT. RESULTS: Fewer than half of the patients who had heard about LDKT were considering this option. Among patients considering LDKT, 26% had not talked to their loved ones about LDKT and 54% had not asked anyone for a kidney. Concerns about the surgical procedure for the donor were associated with a lower likelihood of considering LDKT (adjusted OR = 0.38; CI 0.18-0.79), talking about LDKT (adjusted OR = 0.38; CI 0.18-0.78) and asking for a kidney (adjusted OR = 0.14; CI 0.06-0.36). Being satisfied with the information the patient received about LDKT was associated with a higher likelihood of talking with someone about LDKT and asking for a kidney (adjusted OR = 2.26; CI 1.33-3.83 and 3.89; CI 1.78-8.51). Women and younger patients were more likely to talk with family/friends about LDKT (respectively, adjusted OR = 1.76; CI 1.26-2.47 and 0.97; CI 0.95-0.99) and to ask for a kidney (respectively, adjusted OR = 4.36; CI 2.57-7.40 and 0.97; CI 0.94-0.99). CONCLUSION: Tailored educational programmes considering the patient's stage of readiness and related attitudinal and demographic factors might help patients move towards LDKT.