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1.
Am J Transplant ; 6(8): 1890-5, 2006 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16889544

RESUMO

The prevalence and risk factors for diabetes mellitus after liver transplantation are not well understood. Thus, we sought to identify independent risk factors for the development of diabetes after liver transplantation using currently accepted medical criteria. We studied the prevalence and risk factors in 253 adult recipients transplanted at UCLA between January 1998 and December 2002. Analysis of the retrospective data was performed using demographic, immunosuppression and liver disease variables. Factors found to be significant on a univariate analysis were further studied in a multivariate analysis. There were 158 men and 95 women in our study. The mean age was 51.4 +/- 11.0 years. The mean [+/- standard deviation (SD) pretransplant body mass index was 26.7 (+/-5.1). Most patients were transplanted for hepatitis C (HCV). The prevalence of diabetes after transplantation was 17.8%. In a multivariate analysis only gender [odds ratio (OR) = 0.37; p = 0.02] was independently predictive of the development of diabetes. This study in a large liver transplant recipient population identifies male gender as an independent risk factor for the development of diabetes. Follow-up studies are needed to assess the impact of diabetes, and its intervention on post-transplant morbidity and mortality.


Assuntos
Diabetes Mellitus/epidemiologia , Transplante de Fígado/estatística & dados numéricos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , Fatores de Risco , Taxa de Sobrevida
2.
Transplant Proc ; 38(2): 602-3, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16549186

RESUMO

Seventy-five thousand Americans develop organ failure each year. Fifteen percent of those on the list for transplantation die while waiting. Several possible mechanisms to expand the organ pool are being pursued including the use of extended criteria donors, living donation, and split deceased donor transplants. Cadaveric organ splitting results from improved understanding of the surgical anatomy of the liver derived from Couinaud. Early efforts focused on reduced-liver transplantation (RLT) reported by both Bismuth and Broelsch in the mid-1980s. These techniques were soon modified to create both a left lateral segment graft appropriate for a pediatric recipient and a right trisegment for an appropriately sized adult. Techniques of split liver transplantation (SLT) were also modified to create living donor liver transplantation. Pichlmayr and Bismuth reported successful split liver transplantation in 1989 and Emond reported a larger series of nine split procedures in 1990. Broelsch and Busuttil described a technical modification in which the split was performed in situ at the donor institution with surgical division completed in the heart beating cadaveric donor. In situ splitting reduces cold ischemia, simplifies identification of biliary and vascular structures, and reduces reperfusion hemorrhage. However, in situ splits require specialized skills, prolonged operating room time, and increased logistical coordination at the donor institution. At UCLA over 120 in situ splits have been performed and this technique is the default when an optimal donor is available. Split liver transplantation now accounts for 10% of adult transplantations at UCLA and 40% of pediatric transplantations.


Assuntos
Hepatectomia/métodos , Transplante de Fígado/métodos , Coleta de Tecidos e Órgãos/métodos , Adulto , Ductos Biliares/cirurgia , Cadáver , Criança , Veias Hepáticas/cirurgia , Humanos , Fígado/anatomia & histologia , Veia Porta/cirurgia , Doadores de Tecidos
3.
Transplant Proc ; 36(2): 331-2, 2004 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15050149

RESUMO

PURPOSE: To determine the effectiveness of induction immunotherapy with interleukin-2 receptor antagonists (IL2RA) after intestinal transplantation (IT). METHODS: A single-center, retrospective study was undertaken of all patients undergoing IT using existing medical records and database. Immunotherapy was either triple (standard maintenance triple therapy [SMTT]) or IL2RA [induction IL2RA plus SMTTx] or OKT3 [induction antilymphocyte preparations plus SMTTx]). Data was collected for the first 175 postoperative days. Outcomes included pretransplant renal function, posttransplant serum creatinine normalized to age (nl-sCR), rejection (ACR), and survival. Standard statistical analysis was undertaken. RESULTS: There were no significant differences in the groups: triple (n = 10, median age 3.5 years, cGFR 106 +/- 44 mL/min), IL2RA (n = 13, median age 3.2 years, cGFR 101 +/- 61 mL/min), OKT3 (n = 4, median age 7.7 years, cGFR 104 +/- 27 mL/min). nl-sCR was significantly (P <.01) lower in IL2RA at most postoperative weeks. IL2RA had significantly fewer rejection and infectious episodes than the other two groups. Three-year patient survival was 92% in IL2RA versus 50% triple and OKT3. CONCLUSIONS: IL2RA immunotherapy after IT is associated with a lower incidence of renal dysfunction as compared with historical controls. Furthermore, IL2RA therapy resulted in a lower incidence of rejection and improved survival. IL2RA should be considered in select patients undergoing IT.


Assuntos
Taxa de Filtração Glomerular/fisiologia , Imunossupressores/uso terapêutico , Receptores de Interleucina-2/antagonistas & inibidores , Criança , Pré-Escolar , Rejeição de Enxerto/epidemiologia , Rejeição de Enxerto/prevenção & controle , Humanos , Muromonab-CD3/uso terapêutico , Estudos Retrospectivos
4.
Transplant Proc ; 36(2): 303-4, 2004 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15050139

RESUMO

PURPOSE: To evaluate the outcomes of patients undergoing intestinal transplantation (IT). METHODS: Retrospective review was undertaken using existing medical records and database. RESULTS: Between November 1991 and May 2003, 114 patients were referred for consideration for IT, of which 33 patients received 37 intestinal allografts. All patients had intestinal failure and all patients had significant complications from total parenteral nutrition (TPN). TPN was the predominant cause of liver failure (63%). Combined liver intestinal grafts were used in the majority of patients. Overall 1- and 3-year patient survival is 77% and 52% with patients transplanted since 1999 having a 1- and 3-year survival of 94% and 73%, respectively. The most common cause of death was sepsis. No graft or patient was lost to cytomegalovirus or Epstein-Barr virus disease. Twenty-seven percent of allografts were lost to rejection. Long-term TPN independence is 82% for grafts more than 30 days after IT. Statistical analysis revealed several important factors impacting outcome. CONCLUSIONS: Successful IT defined as prolonged patient and graft survival and TPN independence can be readily achieved in select patients with IF and complications related to TPN therapy. Outcomes have improved with experience gained and control of viral infections and rejection.


Assuntos
Intestinos/transplante , Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Seguimentos , Rejeição de Enxerto/epidemiologia , Sobrevivência de Enxerto/fisiologia , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Nutrição Parenteral Total/efeitos adversos , Estudos Retrospectivos , Análise de Sobrevida , Fatores de Tempo , Transplante Homólogo/métodos , Transplante Homólogo/mortalidade , Transplante Homólogo/fisiologia , Resultado do Tratamento
5.
Transplant Proc ; 36(2): 314-5, 2004 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15050143

RESUMO

Liver-intestinal transplantation is a complex surgical procedure that historically has required prolonged operative periods. This report is the first series where liver-intestinal transplantation was performed as a staged procedure. Specifically, allograft reperfusion was followed by resuscitation and stabilization in an intensive care unit before completion of the transplant procedure. Triage of recipients to the intensive care unit following allograft reperfusion was determined at the time of operation and was based upon the clinical condition of the recipient including hemodynamic stability, evidence of coagulopathy, and assessment of early liver function. Medical stabilization was followed by completion of the transplant procedure and definitive abdominal closure within 72 hours. The application of combined liver-intestinal transplantation as a staged procedure demonstrated no effect upon early graft function, incidence of complications, or ability to perform a definitive abdominal closure.


Assuntos
Intestinos/transplante , Transplante de Fígado/métodos , Transplante Homólogo/métodos , Adulto , Criança , Hemodinâmica , Humanos , Monitorização Intraoperatória , Estudos Retrospectivos
8.
Liver Transpl ; 7(12): 1023-33, 2001 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-11753904

RESUMO

Cholangiocellular carcinoma (CCC) is a biliary malignancy that frequently presents in advanced unresectable stages. The role of liver transplantation (LT) as a surgical modality is unclear. The goal of this study is to evaluate outcomes of patients with CCC undergoing LT. A retrospective analysis of all patients undergoing LT was undertaken. Only those patients with the pathological diagnosis of CCC were included on the study. Patients were divided into two groups based on primary tumor location: extrahepatic (EH)-CCC and intrahepatic (IH)-CCC. The Kaplan-Meier method was used to calculate overall and recurrence-free survival. Log-rank analysis was used to determine the significance of prognostic variables. Twenty-five patients were identified: 9 patients with EH-CCC (5 patients, Klatskin-type; 2 patients, the middle third; and 2 patients, the distal third) and 16 patients with IH-CCC. Mean age was 47.1 +/- 10.6 years. There were 14 men and 11 women. Tumor stage was local (stages I and II; n = 9) or advanced (stages III and IV; n = 16). Overall and disease-free survival rates were 71% and 67% at 1 year and 35% and 32% at 3 years, respectively. Analysis of variables showed statistically significant improved outcomes (P < .05) for the absence of contiguous organ invasion at LT, small tumor size, and single tumor foci. This study indicates that early survival after LT for CCC is acceptable. Three-year disease-free survival is achieved in approximately 30% of patients. These outcomes can be improved by applying strict selection criteria based on prognostic variables identified in this study.


Assuntos
Neoplasias dos Ductos Biliares/cirurgia , Ductos Biliares Intra-Hepáticos/cirurgia , Colangiocarcinoma/cirurgia , Transplante de Fígado , Adulto , Neoplasias dos Ductos Biliares/mortalidade , Neoplasias dos Ductos Biliares/patologia , Quimioterapia Adjuvante , Colangiocarcinoma/mortalidade , Colangiocarcinoma/patologia , Feminino , Humanos , Fígado/patologia , Masculino , Pessoa de Meia-Idade , Cuidados Pós-Operatórios , Complicações Pós-Operatórias , Estudos Retrospectivos , Análise de Sobrevida
10.
Transplantation ; 72(11): 1795-802, 2001 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-11740391

RESUMO

BACKGROUND: The systematic application of living-related and cadaveric, in situ split-liver transplantation has helped to alleviate the critical shortage of suitable-sized, pediatric donors. Undoubtedly, both techniques are beneficial and advantageous; however, the superiority of either graft source has not been demonstrated directly. Because of the potential living-donor risks, we reserve the living donor as the last graft option for pediatric recipients awaiting liver transplantation. Inasmuch as no direct comparison between these two graft types has been performed, we sought to perform a comparative analysis of the functional outcomes of left lateral segmental grafts procured from these donor sources to determine whether differences do exist. METHODS: A retrospective analysis of all liver transplants performed at a single institution between February 1984 and January 1999 was undertaken. Only pediatric (<18 years) recipients of left lateral segmental grafts procured from either living-related (LRD) or cadaveric, in situ split-liver (SLD) donors were included. A detailed analysis of preoperative, intraoperative, and postoperative variables was undertaken. Survival was estimated using the Kaplan-Meier method, and comparison of variables between groups was undertaken using the t test of Wilcoxon rank sum test. RESULTS: There were no significant differences in the preoperative variables between the 39 recipients of SLD grafts and 34 recipients of LRD grafts. The donors did differ significantly in mean age, ABO blood group matching, and preoperative liver function testing. Postoperative liver function testing revealed significant early differences in aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, prothrombin time, and alkaline phosphatase, with grafts from LRD performing better than those from SLD. SLD grafts also had significantly longer ischemia times and a higher incidence of graft loss owing to primary nonfunction and technical complications (9 vs. 2, P<0.05). However, six of these graft losses in the SLD group were because of technical or immunologic causes, which, theoretically, should not differ between the two groups. Furthermore, these graft losses did not negatively impact early patient survival as most patients were successfully rescued with retransplantation (30-day actuarial survival, 97.1% SLD vs. 94.1% LRD, P=0.745). In the surviving grafts, the early differences in liver function variables normalized. CONCLUSIONS: Inherent differences in both donor sources exist and account for differences seen in preoperative and intraoperative variables. Segmental grafts from LRD clearly performed better in the first week after transplantation as demonstrated by lower liver function variables and less graft loss to primary nonfunction. However, the intermediate function (7-30 days) of both grafts did not differ, and the early graft losses did not translate into patient death. Although minimal living-donor morbidity was seen in this series, the use of this donor type still carries a finite risk. We therefore will continue to use SLD as the primary graft source for pediatric patients awaiting liver transplantation.


Assuntos
Transplante de Fígado/métodos , Fígado/fisiopatologia , Adulto , Criança , Feminino , Humanos , Transplante de Fígado/efeitos adversos , Doadores Vivos , Masculino , Estudos Retrospectivos , Fatores de Tempo , Doadores de Tecidos , Resultado do Tratamento
11.
Transplantation ; 72(6): 1113-22, 2001 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-11579310

RESUMO

BACKGROUND: Hepatic transplantation is a highly effective but costly treatment for end-stage hepatic dysfunction. One approach to improve efficiency in the use of scarce organs for transplantation is to identify preoperative factors that are associated with poor outcome posttransplantation. This may assist both in selecting patients optimal for transplantation and in identifying strategies to improve survival. METHODS: In the present work, we retrospectively reviewed consecutive liver transplants performed at the University of California at Los Angeles during a 6-year period and determined preoperative variables that were associated with outcome in primary grafts. In addition, we used the hospital's cost accounting database to determine the impact of these variables on the degree of resource use by high-risk patients. RESULTS: We found five variables to have independent prognostic value in predicting graft survival after primary liver transplantation: (1) donor age, (2) recipient age, (3) donor sodium, (4) recipient creatinine, and (5) recipient ventilator requirement pretransplant. Recipient ventilator requirement and elevated creatinine were associated with significant increases in resource use during the transplant admission. CONCLUSIONS: Patients at high risk for graft failure and costly transplants can be identified preoperatively by a set of parameters that are readily available, noninvasive, and inexpensive. Selection of recipients on the basis of these data would improve the efficiency of liver transplantation and reduce its cost.


Assuntos
Alocação de Recursos para a Atenção à Saúde , Transplante de Fígado , Adulto , Feminino , Rejeição de Enxerto/etiologia , Sobrevivência de Enxerto , Custos de Cuidados de Saúde , Humanos , Transplante de Fígado/economia , Masculino , Pessoa de Meia-Idade , Modelos Teóricos , Análise Multivariada , Seleção de Pacientes , Estudos Retrospectivos , Fatores de Risco , Doadores de Tecidos , Resultado do Tratamento
12.
Arch Surg ; 136(9): 1027-31, 2001 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11529825

RESUMO

HYPOTHESIS: Outcomes after intestinal transplantation have improved during the past decade with refinements in surgical techniques as well as advances in immunosuppression and antimicrobial therapy. DESIGN: Retrospective analysis. SETTING: Tertiary care medical center, August 1991 through December 2000. PATIENTS: Adult (5) and pediatric (12) patients with intestinal failure. All developed complications from long-term total parenteral nutrition therapy. Median age was 8.6 years and median weight was 22 kg. INTERVENTIONS: Primary intestinal transplantation with (n = 14) or without (n = 3) the liver. MAIN OUTCOME MEASURES: Patient and graft survival, viral infections, rejection, and nutritional autonomy. RESULTS: Twenty-one intestinal grafts were transplanted into the 17 recipients. All donors were cadaveric and were matched by ABO blood group and size. Patient survival at 1 and 3 years was 63% and 55%, respectively. Death-censored graft survival at 1 and 3 years was 73% and 55%, respectively. There were 1.5 acute cellular rejection episodes per graft and 3 grafts were lost to rejection. Incidences of infection with the Epstein-Barr virus and cytomegalovirus were negligible with aggressive prophylaxis and preemptive therapy. Nutritional autonomy was achieved in 69% of grafts surviving more than 30 days after intestinal transplantation. CONCLUSIONS: Intestinal transplantation is now the standard of therapy for patients with intestinal failure and complications resulting from total parenteral nutrition. Outcomes have markedly improved since initiation of the program. Aggressive immunosuppression as well as prophylaxis and preemptive antiviral therapy have led to low incidences of acute cellular rejection, Epstein-Barr virus, and cytomegalovirus. Finally, nutritional autonomy can be achieved after successful intestinal transplantation.


Assuntos
Intestinos/transplante , Adolescente , Adulto , Criança , Feminino , Rejeição de Enxerto , Sobrevivência de Enxerto , Humanos , Hospedeiro Imunocomprometido , Imunossupressores/uso terapêutico , Transplante de Fígado , Masculino , Nutrição Parenteral Total/efeitos adversos , Estudos Retrospectivos , Síndrome do Intestino Curto/etiologia , Síndrome do Intestino Curto/mortalidade , Síndrome do Intestino Curto/cirurgia , Análise de Sobrevida , Taxa de Sobrevida , Resultado do Tratamento , Viroses/imunologia , Viroses/prevenção & controle
13.
Ann Surg ; 234(3): 384-93; discussion 393-4, 2001 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11524591

RESUMO

OBJECTIVE: To determine the factors affecting the outcome of orthotopic liver transplantation (OLT) for end-stage liver disease caused by hepatitis C virus (HCV) and to identify models that predict patient and graft survival. SUMMARY BACKGROUND DATA: The national epidemic of HCV infection has become the leading cause of hepatic failure that requires OLT. Rapidly increasing demands for OLT and depleted donor organ pools mandate appropriate selection of patients and donors. Such selection should be guided by a better understanding of the factors that influence the outcome of OLT. METHODS: The authors conducted a retrospective review of 510 patients who underwent OLT for HCV during the past decade. Seven donor, 10 recipient, and 2 operative variables that may affect outcome were dichotomized at the median for univariate screening. Factors that achieved a probability value less than 0.2 or that were thought to be relevant were entered into a stepdown Cox proportional hazard regression model. RESULTS: Overall patient and graft survival rates at 1, 5, and 10 years were 84%, 68%, and 60% and 73%, 56%, and 49%, respectively. Overall median time to HCV recurrence was 34 months after transplantation. Neither HCV recurrence nor HCV-positive donor status significantly decreased patient and graft survival rates by Kaplan-Meier analysis. However, use of HCV-positive donors reduced the median time of recurrence to 22.9 months compared with 35.7 months after transplantation of HCV-negative livers. Stratification of patients into five subgroups, based on time of recurrence, revealed that early HCV recurrence was associated with significantly increased rates of patient death and graft loss. Donor, recipient, and operative variables that may affect OLT outcome were analyzed. On univariate analysis, recipient age, serum creatinine, donor length of hospital stay, donor female gender, United Network for Organ Sharing (UNOS) status of recipient, and presence of hepatocellular cancer affected the outcome of OLT. Elevation of pretransplant HCV RNA was associated with an increased risk of graft loss. Of 15 variables considered by multivariate Cox regression analysis, recipient age, UNOS status, donor gender, and log creatinine were simultaneous significant predictors for patient survival. Simultaneously significant factors for graft failure included log creatinine, log alanine transaminase, log aspartate transaminase, UNOS status, donor gender, and warm ischemia time. These variables were therefore entered into prognostic models for patient and graft survival. CONCLUSION: The earlier the recurrence of HCV, the greater the impact on patient and graft survival. The use of HCV-positive donors may accelerate HCV recurrence, and they should be used judiciously. Patient survival at the time of transplantation is predicted by donor gender, UNOS status, serum creatinine, and recipient age. Graft survival is affected by donor gender, warm ischemia time, and pretransplant patient condition. The authors' current survival prognostic models require further multicenter validation.


Assuntos
Hepatite C/cirurgia , Transplante de Fígado , Adulto , Análise de Variância , Feminino , Sobrevivência de Enxerto , Hepatite C/mortalidade , Humanos , Terapia de Imunossupressão/métodos , Falência Hepática/cirurgia , Masculino , Modelos Estatísticos , Recidiva , Estudos Retrospectivos , Resultado do Tratamento
14.
Liver Transpl ; 7(6): 551-5, 2001 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11443587

RESUMO

A right lobe graft that is drained by the right hepatic vein (RHV) is obtained by transecting the liver on the right side of the middle hepatic vein (MHV). On occasion, a small RHV that only drains a portion of the right lobe, with the predominant outflow achieved by the MHV, is encountered. If such variation is not recognized while performing right lobe liver transplantation and the RHV only is used for reconstruction, venous outflow obstruction with subsequent graft congestion and eventual graft failure will occur. Additionally, preservation of the main MHV and its branch drainage of the left lobe is crucial to avoid outflow blockage to the remaining segment 4 in the donor. We report 4 cases showing a variant type of small RHV and large MHV branch that drain not only segments 5 and 8, but also segments 6 and 7. These variations were simultaneously associated with a large-caliber inferior RHV that also required reconstruction. The methods used to diagnose such anatomic variations and the techniques for reconstruction in the donor and recipient are described.


Assuntos
Veias Hepáticas/fisiologia , Veias Hepáticas/cirurgia , Transplante de Fígado/métodos , Adulto , Hepatectomia/métodos , Veias Hepáticas/anatomia & histologia , Humanos , Circulação Hepática , Transplante de Fígado/diagnóstico por imagem , Transplante de Fígado/fisiologia , Doadores Vivos , Pessoa de Meia-Idade , Ultrassonografia
16.
Liver Transpl ; 6(6): 741-8, 2000 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11084061

RESUMO

Orthotopic liver transplantation (OLT) for hepatitis B virus (HBV) infection was limited until recently by poor graft and patient outcomes caused by recurrent HBV. Long-term immunoprophylaxis with hepatitis B immune globulin (HBIG) dramatically improved post-OLT survival, but recurrent HBV still occurred in up to 36% of the recipients. More recently, combination HBIG and lamivudine has been shown to effectively prevent HBV recurrence in patients post-OLT. The aim of the current study is to determine long-term outcome and cost-effectiveness of using combination HBIG and lamivudine compared with HBIG monotherapy in patients who undergo OLT for HBV. A retrospective chart review identified 59 patients administered combination HBIG and lamivudine and 12 patients administered HBIG monotherapy as primary prophylaxis against recurrent HBV. Lamivudine, 150 mg/d, was administered orally indefinitely. HBIG was administered under a standard protocol (10,000 IU intravenously during the anhepatic phase, then 10,000 IU/d intravenously for 7 days, then 10,000 IU intravenously monthly) indefinitely. A decision-analysis model was developed to evaluate the potential economic impact of prophylaxis against HBV with combination therapy compared with monotherapy. Recurrent HBV was defined as the reappearance of hepatitis B surface antigen (HBsAg) after its initial disappearance post-OLT. In the combination-therapy group, no patient redeveloped serum HBsAg or HBV DNA during mean follow-ups of 459 and 416 days, respectively. In the monotherapy group, 3 patients (25%) had reappearance of HBsAg in serum during a mean follow-up of 663 days. Combination therapy resulted in a dominant, cost-effective strategy with an average cost-effectiveness ratio of $252,111/recurrence prevented compared with $362,570/recurrence prevented in the monotherapy strategy. Combination prophylaxis with HBIG and lamivudine is highly effective in preventing recurrent HBV, may protect against the emergence of resistant mutants, and is significantly more cost-effective than HBIG monotherapy with its associated rate of recurrent HBV.


Assuntos
Hepatite B/tratamento farmacológico , Imunização Passiva/economia , Imunoglobulinas/uso terapêutico , Lamivudina/uso terapêutico , Transplante de Fígado , Inibidores da Transcriptase Reversa/uso terapêutico , Adolescente , Adulto , Idoso , Análise Custo-Benefício , DNA Viral/análise , Quimioterapia Combinada , Feminino , Sobrevivência de Enxerto/efeitos dos fármacos , Hepatite B/cirurgia , Hepatite B/virologia , Antígenos de Superfície da Hepatite B/análise , Vírus da Hepatite B/genética , Vírus da Hepatite B/imunologia , Humanos , Imunoglobulinas/economia , Lamivudina/economia , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Inibidores da Transcriptase Reversa/economia , Prevenção Secundária , Resultado do Tratamento , Replicação Viral/efeitos dos fármacos
17.
Ann Surg ; 232(3): 312-23, 2000 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10973381

RESUMO

OBJECTIVE: To determine the factors that influence patient survival after in vivo split liver transplantation (SLT). SUMMARY BACKGROUND DATA: Split liver transplantation is effective in expanding the donor pool, and its use reduces the number of deaths in patients awaiting orthotopic liver transplantation. Early SLTs were associated with poor outcomes, and acceptance of the technique has been slow. A better understanding of the factors that influence patient and graft survival would be useful in widening the application of SLT. METHODS: During a 3.5-year period, 55 right and 55 left lateral in vivo split grafts were transplanted in 102 pediatric and adult recipients. The authors' in vivo split technique has been previously described. Median follow-up was 14.5 months. Recipient, donor, and surgical variables were analyzed for their effect on patient survival after SLT. RESULTS: Overall survival rates of patients who received an SLT were not significantly different from those of patients who received whole organ transplants. Survival of left lateral segment recipients, at median follow-up time, was 76% versus 80% in patients receiving a trisegment. Fifty of 102 patients (49%) were high-risk urgent recipients (United Network for Organ Sharing [UNOS] status 1 and 2A) and 52 (51%) were nonurgent recipients (UNOS status 2B, 3). High-risk recipients had a survival rate significantly lower than that of nonurgent recipients. By univariate comparison, two variables-UNOS status and number of transplants per patient-were significantly associated with an increased risk of death. Preoperative recipient mechanical ventilation, preoperative prothrombin time, donor sodium level, donor length of hospital stay, and warm ischemia time approached significance. The type of graft (right vs. left) did not reduce the survival rate after transplantation. Multivariate logistic regression analysis identified UNOS status and length of donor hospital stay as independent predictors of survival. CONCLUSIONS: Patient survival of in vivo SLT is not significantly different from that of whole-organ orthotopic liver transplantation. The variables affecting outcome of in vivo SLT are similar to those in whole-organ transplantation. in vivo SLT should be widely applied to expand a severely depleted donor pool.


Assuntos
Transplante de Fígado/métodos , Complicações Pós-Operatórias/mortalidade , Adolescente , Adulto , Idoso , Causas de Morte , Criança , Pré-Escolar , Feminino , Seguimentos , Mortalidade Hospitalar , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Taxa de Sobrevida
19.
Ann Surg ; 229(6): 824-31; discussion 831-3, 1999 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-10363896

RESUMO

OBJECTIVE: To determine the outcome of orthotopic liver transplantation (OLT) for end-stage liver disease caused by hepatitis C virus (HCV). SUMMARY BACKGROUND DATA: HCV has become the leading cause of cirrhosis and hepatic failure leading to OLT. Recurrent HCV after OLT is associated with significant complications and may lead to graft loss that requires retransplantation (re-OLT). The authors studied the outcome of transplantation for HCV, the effect of primary immunotherapy, and causes of retransplantation. METHODS: The authors conducted a retrospective review of their experience during an 8-year period (1990-1997), during which 374 patients underwent transplants for HCV (298 [79.6%] received one OLT; 76 [20.4%] required re-OLT). Median follow-up was 2 years (range 0 to 8.3). Immunosuppression was based on cyclosporine in 190 patients and tacrolimus in 132 patients. In a third group of patients, therapy was switched from cyclosporine to tacrolimus or from tacrolimus to cyclosporine (cyclosporine/tacrolimus group). RESULTS: Overall, 1-, 2-, and 5-year actuarial patient survival rates were 86%, 82%, and 76%, respectively. The 2-year patient survival rate was 81 % in the cyclosporine group, 85% in the tacrolimus group, and 82% in the cyclosporine/tacrolimus group. In patients receiving one OLT, overall 1-, 2-, and 5-year patient survival rates were 85%, 81%, and 75%, respectively. The 2-year patient survival rate was 79% in the cyclosporine group, 84% in the tacrolimus group, and 80% in the cyclosporine/tacrolimus group. The overall graft survival rates were 70%, 65%, and 60% at 1, 2, and 5 years, respectively. The graft survival rate at 2 years was similar under cyclosporine (68.5%), tacrolimus (64%), or cyclosporine/tacrolimus (60%) therapy. Re-OLT was required in 42 (11.2%) patients for graft dysfunction in the initial 30 days after OLT. Other causes for re-OLT included hepatic artery thrombosis in 10 (2.6%), chronic rejection in 8 (2.1%), and recurrent HCV in 13 (3.4%) patients. The overall survival rates after re-OLT were 63% and 58% at 1 and 2 years. The 1-year survival rate after re-OLT was 61 % for graft dysfunction, 50% for chronic rejection, 60% for hepatic artery thrombosis, and 60% for recurrent HCV. At re-OLT, 85.3% of the patients were critically ill (United Network for Organ Sharing [UNOS] status 1); only 14.7% of the patients were UNOS status 2 and 3. In re-OLT for chronic rejection and recurrent HCV, the 1-year survival rate of UNOS 1 patients was 38.4%, compared with 87.5% for UNOS 2 and 3 patients. In patients requiring re-OLT, there was no difference in the 1-year patient survival rate after re-OLT when cyclosporine (60%), tacrolimus (63%), or cyclosporine/tacrolimus (56%) was used for primary therapy. With cyclosporine, three patients (1.5%) required re-OLT for chronic rejection versus one patient (0.7%) with tacrolimus. Re-OLT for recurrent HCV was required in four (3%) and seven (3.6%) patients with tacrolimus and cyclosporine therapy, respectively. CONCLUSIONS: Orthotopic liver transplantation for HCV is performed with excellent results. There are no distinct advantages to the use of cyclosporine versus tacrolimus immunosuppression when patient and graft survival are considered. Re-OLT is an important option in the treatment of recurrent HCV and should be performed early in the course of recurrent disease. Survival after re-OLT is not distinctively affected by cyclosporine or tacrolimus primary immunotherapy. The incidence of re-OLT for recurrent HCV or chronic rejection is low after either tacrolimus or cyclosporine therapy.


Assuntos
Ciclosporina/uso terapêutico , Hepatite C/cirurgia , Terapia de Imunossupressão , Imunossupressores/uso terapêutico , Transplante de Fígado , Adulto , Seguimentos , Sobrevivência de Enxerto , Hepatite C/mortalidade , Humanos , Transplante de Fígado/mortalidade , Reoperação , Estudos Retrospectivos , Taxa de Sobrevida , Fatores de Tempo , Resultado do Tratamento
20.
Transplantation ; 67(3): 422-30, 1999 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-10030290

RESUMO

To formulate a model predicting survival after liver retransplantation, we analyzed in detail the last 150 cases of hepatic retransplantation at UCLA. Cox proportional hazards regression analysis identified five variables that demonstrated independent simultaneous prognostic value in estimating patient survival after retransplantation: (1) age group (pediatric or adult), (2) recipient requiring preoperative mechanical ventilation, (3) donor organ cold ischemia > or =12 hr, (4) preoperative serum creatinine, and (5) preoperative serum total bilirubin. The Cox regression equation that predicts survival based on these covariates was simplified by assigning individual patients a risk classification based on a 5-point scoring system. We demonstrate that this system can be employed to identify a subgroup of patients in which the expected outcome is too poor to justify retransplantation. These findings may assist in the rational selection of patients suitable for retransplantation.


Assuntos
Transplante de Fígado/mortalidade , Reoperação/mortalidade , Adulto , Fatores Etários , California , Criança , Intervalos de Confiança , Seguimentos , Hospitais Universitários , Humanos , Isquemia , Fígado , Modelos Estatísticos , Análise Multivariada , Preservação de Órgãos , Modelos de Riscos Proporcionais , Estudos Retrospectivos , Fatores de Risco , Análise de Sobrevida , Fatores de Tempo , Doadores de Tecidos
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