VINICIUS ROCHA SANTOS
Projetos de Pesquisa
Unidades Organizacionais
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/37 - Laboratório de Transplante e Cirurgia de Fígado, Hospital das Clínicas, Faculdade de Medicina
LIM/37 - Laboratório de Transplante e Cirurgia de Fígado, Hospital das Clínicas, Faculdade de Medicina
7 resultados
Resultados de Busca
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- Arterial Pseudoaneurysm Associated with Pancreas and Kidney Transplantation: A Case Report(2017) ARANTES, Rubens Macedo; PANTANALI, Carlos Andres Rodriguez; SANTOS, Vinicius Rocha; D'ALBUQUERQUE, Luiz Augusto CarneiroObjective: Unusual clinical course Background: Pseudoaneurysm is a rare vascular complication in pancreas transplantation. This complication develops from a disruption of the arterial continuity, usually related to trauma, infection, vasculitis, or complications in vascular procedures. Case Report: A 43-year-old man underwent simultaneous pancreas and kidney transplantation for end-stage renal disease. He subsequently developed acute pancreatitis and acute kidney cellular rejection as late complications, thus returning to hemodialysis. A new, uneventful kidney transplantectomy and living donor kidney transplant was performed. One year after the last transplant, the patient presented with moderate abdominal pain, fever, and a pulsatile tumor located in the right iliac fossa. A pseudoaneurysm located in the pancreatic Y graft was observed. The patient was treated using an endovascular and surgical approach. Conclusions: A combined procedure using an endovascular and surgical approach promoted a good vascular control with a lower risk of bleeding in a rare case of pseudoaneurysm in a transplant patient.
- Re-Transplantation, Higher Creatinine Levels in Hepatitis C Virus Patients, and Donor Age Are Predictors of Mortality in Long-Term Analysis of Late Acute Rejection in Liver Transplantation(2017) NACIF, Lucas Souto; PINHEIRO, Rafael Soares; PECORA, Rafael Antonio de Arruda; TANIGAWA, Ryan Yukimatsu; ROCHA-SANTOS, Vinicius; ANDRAUS, Wellington; ALVES, Venancio Avancini Ferreira; D'ALBUQUERQUE, Luiz CarneiroBackground: Late acute rejection (LAR) differs in its clinical and histological presentation and management from early acute rejection. This clinical entity is not completely understood; thus, we aimed to identify significant prognostic factors that can influence post-transplant survival in LAR patients. The purpose of this study was to evaluate the incidence and post-transplant survival of patients from a single center with a focus on late acute rejection. Material/Methods: From January 2002 to June 2013, all liver biopsies from patients with rejection were scored using the Banff criteria. The groups were compared, and simple and multiple logistic regression and survival curves were created. Results: A total of 779 liver transplants were performed; 585 patients with no rejections and 194 patients with rejections were analyzed. The overall incidence of LAR was 6.7%, and there was a higher prevalence of early acute cellular rejection than LAR. The mean time to LAR was 564 days (median 214 days, range 91-2642). LAR had a more severe grade (35.3%) than early acute rejection (23.5%). The survival rates were similar between both modalities for the long-term period. Worse mortality rates were observed in liver re-transplantation (HR 4.77; p<0.0001); in hepatitis C virus patients with increased creatinine levels (HR 22.48; p=0.016); and in donors > 41 years of age (OR 2.1; p=0.047) in a long-term analysis of LAR. Conclusions: Liver re-transplantation, higher creatinine levels in hepatitis C virus patients, and donor age were predictors of mortality in this long-term analysis of late acute rejection in liver transplantation.
- PREOPERATIVE COMPUTED TOMOGRAPHY VOLUMETRY AND GRAFT WEIGHT ESTIMATION IN ADULT LIVING DONOR LIVER TRANSPLANTATION(2017) PINHEIRO, Rafael S.; CRUZ-JR, Ruy J.; ANDRAUS, Wellington; DUCATTI, Liliana; MARTINO, Rodrigo B.; NACIF, Lucas S.; ROCHA-SANTOS, Vinicius; ARANTES, Rubens M; LAI, Quirino; IBUKI, Felicia S.; ROCHA, Manoel S.; D´ALBUQUERQUE, Luiz A. C.ABSTRACT Background: Computed tomography volumetry (CTV) is a useful tool for predicting graft weights (GW) for living donor liver transplantation (LDLT). Few studies have examined the correlation between CTV and GW in normal liver parenchyma. Aim: To analyze the correlation between CTV and GW in an adult LDLT population and provide a systematic review of the existing mathematical models to calculate partial liver graft weight. Methods: Between January 2009 and January 2013, 28 consecutive donors undergoing right hepatectomy for LDLT were retrospectively reviewed. All grafts were perfused with HTK solution. Estimated graft volume was estimated by CTV and these values were compared to the actual graft weight, which was measured after liver harvesting and perfusion. Results: Median actual GW was 782.5 g, averaged 791.43±136 g and ranged from 520-1185 g. Median estimated graft volume was 927.5 ml, averaged 944.86±200.74 ml and ranged from 600-1477 ml. Linear regression of estimated graft volume and actual GW was significantly linear (GW=0.82 estimated graft volume, r2=0.98, slope=0.47, standard deviation of 0.024 and p<0.0001). Spearman Linear correlation was 0.65 with 95% CI of 0.45 - 0.99 (p<0.0001). Conclusion: The one-to-one rule did not applied in patients with normal liver parenchyma. A better estimation of graft weight could be reached by multiplying estimated graft volume by 0.82.
- Functional Budd-Chiari Syndrome Associated With Severe Polycystic Liver Disease(2017) NEVES, Precil Diego Miranda de Menezes; BALBO, Bruno Eduardo Pedroso; WATANABE, Elieser Hitoshi; ROCHA-SANTOS, Vinicius; ANDRAUS, Wellington; D'ALBUQUERQUE, Luiz Augusto Carneiro; ONUCHIC, Luiz FernandoA 50-year-old woman with end-stage renal disease secondary to autosomal dominant polycystic kidney disease was referred to a quaternary care center due to significantly increased abdominal girth. Her physical examination revealed tense ascites and abdominal collateral veins. A 10-L paracentesis improved abdominal discomfort and disclosed a transudate, suggestive of portal hypertension. A computed tomographic scan revealed massive hepatomegaly caused by multiple cysts of variable sizes, distributed throughout all hepatic segments. Contrast-enhanced imaging uncovered extrinsic compression of hepatic and portal veins, resulting in functional Budd-Chiari syndrome and portal hypertension. Although image-guided drainage followed by sclerosis of dominant cysts could potentially lead to alleviation of the extrinsic compression, the associated significant risk of cyst hemorrhage and infection precluded this procedure. In this scenario, the decision was to submit the patient to a liver-kidney transplantation. After 1 year of this procedure, the patient maintains normal liver and kidney function and refers significant improvement in quality of life.
- Laparoscopic cholecystectomy and cirrhosis: patient selection and technical considerations(2017) PINHEIRO, Rafael S.; WAISBERG, Daniel R.; LAI, Quirino; ANDRAUS, Wellington; NACIF, Lucas S.; ROCHA-SANTOS, Vinicius; D'ALBUQUERQUE, Luiz A. C.The incidence of cholelithiasis in cirrhotic patients is higher than in general population. In the past, open cholecystectomy (OC) was the standard approach for patients requiring cholecystectomy. However, laparoscopic cholecystectomy (LC) was introduced in 1980's and gradually became the preferred technique even to cirrhotic patients. The performance of gastrointestinal surgery procedures in cirrhotics patients is well-known to be associated with higher technical difficulty and increased morbidity-mortality. Cirrhosis is a major key intraoperative finding that contributes to surgical difficulty in LC. Model of End Stage Liver Disease (MELD) score and Child-Pugh Classification are the best devices to evaluate the underlying liver disease and to predict morbidity-mortality. Acute cholecystitis has higher incidence in patients with cirrhosis, emergency procedures in cirrhotics patients are associated with higher morbidity, longer postoperative hospitalization and a seven-fold higher mortality in comparison to elective surgery. LC in cirrhotics has a higher conversion rate to open procedure; however, LC demonstrated substantial advantage over OC providing shorter convalescence period and hospital stay.
- A Case of Left Renal Vein Ligation in a Patient with Solitary Left Kidney Undergoing Liver Transplantation to Control Splenorenal Shunt and Improve Portal Venous Flow(2017) MARTINO, Rodrigo B.; ROCHA JUNIOR, Eserval; MANUEL, Valdano; ROCHA-SANTOS, Vinicius; D'ALBUQUERQUE, Luiz Augusto C.; ANDRAUS, WellingtonObjective: Rare co-existance of disease or pathology Background: Adequate portal venous flow is required for successful liver transplantation. Reduced venous flow and blood flow 'steal' by collateral vessels are a concern, and when there is a prominent splenorenal shunt present, ligation of the left renal vein has been recommended to improve portal venous blood flow. Case Report: A 51-year-old man who had undergone right nephrectomy in childhood required liver transplantation for liver cirrhosis and hepatocellular carcinoma due to hepatitis C virus (HCV) infection. The patient had no other comorbidity and no history of hepatorenal syndrome. At transplantation surgery, portal venous flow was poor and did not improve with ligation of shunt veins, but ligation of the left renal vein improved portal venous flow. On the first and fifth postoperative days, the patient was treated with basiliximab, a chimeric monoclonal antibody to the IL-2 receptor, and methylprednisolone. The calcineurin inhibitor, tacrolimus, was introduced on the fifth postoperative day. On the sixteenth postoperative day, renal color Doppler ultrasound showed normal left renal parenchyma; hepatic Doppler ultrasound showed good portal vein flow and preserved hepatic parenchyma in the liver transplant. Conclusions: This case report has shown that in a patient with a single left kidney, left renal vein ligation is feasible and safe in a patient with no other risk factors for renal impairment following liver transplantation. Modification of postoperative immunosuppression to avoid calcineurin inhibitors in the very early postoperative phase may be important in promoting good recovery of renal function and to avoid the need for postoperative renal dialysis.
- Living donor liver transplantation for hepatocellular cancer: An (almost) exclusive Eastern procedure?(2017) PINHEIRO, R. S.; WAISBERG, D. R.; NACIF, L. S.; ROCHA-SANTOS, V.; ARANTES, R. M.; DUCATTI, L.; MARTINO, R. B.; LAI, Q.; ANDRAUS, W.; DALBUQUERQUE, L. A. C.Hepatocellular carcinoma (HCC) is the fifth most prevalent cancer and it is linked with chronic liver disease. Liver transplantation (LT) is the best curative treatment modality, since it can cure simultaneously the underlying liver disease and HCC. Milan criteria (MC) are the benchmark for selecting patients with HCC for LT, achieving up to 91% 1-year survival post transplantation. However, when considering intention-to-treat (ITT) rates are substantially lower, mainly due dropout. Additionally, Milan criteria (MC) are too restrictive and more inclusive criteria have been reported with good outcomes. Mainly, in Eastern countries, deceased donors are scarce, therefore Asian centers have developed living-donor liver transplantation (LDLT) to a state-of-art status. There are many eastern centers reporting huge numbers of LDLT with outstanding results. Regarding HCC patients, they have reported many criteria including more advanced tumors achieving reasonable outcomes. Western countries have well-established deceased-donor liver transplantation (DDLT) programs. However, organ shortage and restrictive criteria for listing patients with HCC endorses LDLT as a good option to offer curative treatment to more HCC patients. However, there are some controversial reports claiming higher rates of HCC recurrence after LDLT than DDLT. An extensive review included 30 studies with cohorts of HCC patients who underwent LDLT in both East and West countries. We reported also the results of our Institution, in Brazil, where it was performed the first LDLT. This review also addresses the eligibility criteria for transplanting patients with HCC developed in Western and Eastern countries. © Translational Gastroenterology and Hepatology. All rights reserved.