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1.
Intern Med J ; 46(3): 332-8, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-26748888

RESUMEN

BACKGROUND: Despite recognised benefits of optimal glycaemic control in patients with type 1 diabetes mellitus (T1DM), good control is still difficult to achieve, particularly for adolescents and young adults. Recognition of factors that may assist early optimisation of glycaemic control is therefore important. AIMS: We explored associations of demographic, social and behavioural factors with glycosylated haemoglobin (HbA1c) levels in participants with T1DM aged 18-25 years. METHODS: A cross-sectional analysis was performed on young adults attending a dedicated multidisciplinary clinic at Fremantle Hospital, Western Australia from January to August 2014. RESULTS: Data from 93 participants were analysed. Mean age was 21.4 ± 2.3 years, and 39.8% of the cohort were female. Longer duration of diabetes was associated with higher HbA1c (r = 0.25, P = 0.04). Men had lower HbA1c than women (8.2 ± 1.6 vs 9.2 ± 2.0%, P = 0.01). Increased frequency of clinic attendance was associated with lower HbA1c (r = -0.27, P = 0.02). Those engaged in work or study had better HbA1c compared with those who were not (8.9 ± 2.1 vs 10.5 ± 2.1%, P = 0.03). Socioeconomic disadvantage, risk-taking behaviour, insulin pump use and distance travelled to clinic were not associated with differences in HbA1c. CONCLUSION: In young adults with T1DM, geographical separation, socioeconomic disadvantage and risk-taking behaviours did not influence glycaemic control. Longer duration of diabetes identifies young adults at higher risk of poor control, while attendance at a multidisciplinary clinic and engagement in work or study was associated with better glycaemic control. Additional studies are warranted to clarify the role of behavioural interventions to improve diabetes management in young adults.


Asunto(s)
Diabetes Mellitus Tipo 1/sangre , Diabetes Mellitus Tipo 1/psicología , Empleo , Índice Glucémico/fisiología , Asunción de Riesgos , Adolescente , Adulto , Glucemia/efectos de los fármacos , Glucemia/metabolismo , Estudios de Cohortes , Estudios Transversales , Diabetes Mellitus Tipo 1/epidemiología , Empleo/tendencias , Femenino , Índice Glucémico/efectos de los fármacos , Humanos , Insulina/administración & dosificación , Masculino , Australia Occidental/epidemiología , Adulto Joven
2.
Am J Transplant ; 13(7): 1713-23, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23750851

RESUMEN

Transplantation reliably evokes allo-specific B cell and T cell responses in mice. Yet, human recipients of kidney transplants with normal function usually exhibit little or no antibody specific for the transplant donor during the early weeks and months after transplantation. Indeed, the absence of antidonor antibodies is taken to reflect effective immunosuppressive therapy and to predict a favorable outcome. Whether the absence of donor-specific antibodies reflects absence of a B cell response to the donor, tolerance to the donor or immunity masked by binding of donor-specific antibodies to the graft is not known. To distinguish between these possibilities, we devised a novel ELISPOT, using cultured donor, recipient and third-party fibroblasts as targets. We enumerated donor-specific antibody-secreting cells in the blood of nine renal allograft recipients with normal kidney function before and after transplantation. Although none of the nine subjects had detectable donor-specific antibodies before or after transplantation, all exhibited increases in the frequency of donor-specific antibody-secreting cells eight weeks after transplantation. The responses were directed against the donor HLA-class I antigens. The increase in frequency of donor-specific antibody-secreting cells after renal transplantation indicates that B cells respond specifically to the transplant donor more often than previously thought.


Asunto(s)
Linfocitos B/inmunología , Rechazo de Injerto/inmunología , Supervivencia de Injerto/inmunología , Inmunidad Celular , Isoanticuerpos/inmunología , Trasplante de Riñón/inmunología , Adulto , Animales , Células Productoras de Anticuerpos/inmunología , Células Productoras de Anticuerpos/patología , Linfocitos B/patología , Células Cultivadas , Ensayo de Immunospot Ligado a Enzimas , Femenino , Rechazo de Injerto/patología , Prueba de Histocompatibilidad/métodos , Humanos , Trasplante de Riñón/patología , Masculino , Ratones , Persona de Mediana Edad , Trasplante Homólogo
3.
Am J Transplant ; 10(5): 1228-37, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20353469

RESUMEN

Late-onset cytomegalovirus (CMV) disease is a significant problem with a standard 3-month prophylaxis regimen. This multicentre, double-blind, randomized controlled trial compared the efficacy and safety of 200 days' versus 100 days' valganciclovir prophylaxis (900 mg once daily) in 326 high-risk (D+/R-) kidney allograft recipients. Significantly fewer patients in the 200-day group versus the 100-day group developed confirmed CMV disease up to month 12 posttransplant (16.1% vs. 36.8%; p < 0.0001). Confirmed CMV viremia was also significantly lower in the 200-day group (37.4% vs. 50.9%; p = 0.015 at month 12). There was no significant difference in the rate of biopsy-proven acute rejection between the groups (11% vs. 17%, respectively, p = 0.114). Adverse events occurred at similar rates between the groups and the majority were rated mild-to-moderate in intensity and not related to study medication. In conclusion, this study demonstrates that extending valganciclovir prophylaxis (900 mg once daily) to 200 days significantly reduces the incidence of CMV disease and viremia through to 12 months compared with 100 days' prophylaxis, without significant additional safety concerns associated with longer treatment. The number needed to treat to avoid one additional patient with CMV disease up to 12 months posttransplant is approximately 5.


Asunto(s)
Antivirales/uso terapéutico , Infecciones por Citomegalovirus/tratamiento farmacológico , Infecciones por Citomegalovirus/prevención & control , Citomegalovirus/metabolismo , Biopsia , Infecciones por Citomegalovirus/virología , Método Doble Ciego , Femenino , Ganciclovir/análogos & derivados , Humanos , Incidencia , Riñón/virología , Trasplante de Riñón , Masculino , Persona de Mediana Edad , Factores de Riesgo , Seguridad , Valganciclovir , Viremia/inducido químicamente , Viremia/tratamiento farmacológico , Viremia/virología
4.
Am J Transplant ; 10(6): 1365-74, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-20553447

RESUMEN

Donors after cardiac death (DCD) could increase the organ pool. Data supports good long-term renal graft survival. However, DCDs are <10% of deceased donors in the United States, due to delayed graft function, and primary nonfunction. These complications are minimized by extracorporeal support after cardiac death (ECS-DCD). This study assesses immediate and acute renal function from different donor types. DCDs kidneys were recovered by conventional rapid recovery or by ECS, and transplanted into nephrectomized healthy swine. Warm ischemia of 10 and 30 min were evaluated. Swine living donors were controls (LVD). ECS-DCDs were treated with 90 min of perfusion until organ recovery. After procurement, kidneys were cold storage 4-6 h. Renal vascular resistance (RVR), urine output (UO), urine protein concentration (UrPr) and creatinine clearance (CrCl), were collected during 4 h posttransplantation. All grafts functioned with adequate renal blood flow for 4 h. RVR at 4 h posttransplant returned to baseline only in the LVD group (0.36 mmHg/mL/min +/- 0.03). RVR was higher in all DCDs (0.66 mmHg/mL/min +/- 0.13), without differences between them. UO was >50 mL/h in all DCDs, except in DCD-30 (6.8 mL/h +/- 1.7). DCD-30 had lower CrCl (0.9 mL/min +/- 0.2) and higher UrPr >200 mg/dL, compared to other DCDs >10 mL/min and <160 mg/dL, respectively. Normothermic ECS can resuscitate kidneys to transplantable status after 30 min of cardiac arrest/WI.


Asunto(s)
Muerte , Trasplante de Riñón/fisiología , Animales , Creatinina , Funcionamiento Retardado del Injerto/fisiopatología , Femenino , Supervivencia de Injerto , Paro Cardíaco/fisiopatología , Riñón/fisiología , Riñón/fisiopatología , Pruebas de Función Renal , Perfusión , Porcinos , Donantes de Tejidos , Isquemia Tibia
5.
Clin Transplant ; 24(1): 67-72, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-19222505

RESUMEN

As the outcomes of heart, liver, and lung transplantation continue to improve, more patients will present for subsequent renal transplantation. It remains unclear whether these patients benefit from induction immunosuppression. We retrospectively reviewed induction on solid organ graft recipients who underwent renal transplant at our center from January 1, 1995 to March 30, 2007. Induction and the non-induction groups were compared by univariate and Kaplan-Meier analyses. There were 21 patients in each group, with mean follow-up of 4.5-6.0 years. Forty-seven percent of patients receiving induction had a severe post-operative infection, compared with 28.6% in the non-induction group (p = NS). The one yr rejection rate in the induction group was 9.5% compared with 14.3% for non-induction (p = NS). One-yr graft survival was 81.0% and 95.2% in the induction and non-induction group (p = NS). In summary, there is a trend toward lower patient and graft survival among patients undergoing induction. These trends could relate to selection bias in the decision to prescribe induction immunosuppression, but further study is needed to better define the risks and benefits of antibody-induction regimens in this population.


Asunto(s)
Terapia de Inmunosupresión/métodos , Inmunosupresores/administración & dosificación , Fallo Renal Crónico/cirugía , Trasplante de Órganos , Adulto , Estudios de Cohortes , Femenino , Supervivencia de Injerto , Cardiopatías/complicaciones , Cardiopatías/inmunología , Cardiopatías/cirugía , Humanos , Fallo Renal Crónico/complicaciones , Fallo Renal Crónico/mortalidad , Hepatopatías/complicaciones , Hepatopatías/inmunología , Hepatopatías/cirugía , Enfermedades Pulmonares/complicaciones , Enfermedades Pulmonares/inmunología , Enfermedades Pulmonares/cirugía , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Análisis de Supervivencia , Resultado del Tratamiento
6.
Am J Transplant ; 9(10): 2416-23, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19656129

RESUMEN

Travel to procure deceased donor organs is associated with risk to transplant personnel. In many instances, multiple teams are present for a given operation. We studied our statewide experience to determine how much excess travel this redundancy entails, and generated alternate models for organ recovery. We reviewed our organ procurement organization's experience with deceased donor operations between 2002 and 2008. Travel was expressed as cumulative person-miles between procurement team origin and donor hospital. A model of minimal travel was created, using thoracic and abdominal teams from the closest in-state center. A second model involved transporting donors to a dedicated procurement facility. Travel distance was recalculated using these models, and mode and cost of travel extrapolated from current practices. In 654 thoracic and 1469 abdominal donors studied, the mean travel for thoracic teams was 1066 person-miles and for abdominal teams was 550 person-miles. The mean distance traveled by thoracic and abdominal organs was 223 miles and 142 miles, respectively. Both hypothetical models showed reductions in team travel and reliance on air transport, with favorable costs and organ transport times compared to historical data. In summary, we found significant inefficiency in current practice, which may be alleviated using new paradigms for donor procurement.


Asunto(s)
Obtención de Tejidos y Órganos/normas , Humanos , Michigan , Donantes de Tejidos
7.
Am J Transplant ; 8(3): 586-92, 2008 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-18294154

RESUMEN

Over the past several years we have noted a marked decrease in this profitability of our kidney transplant program. Our hypothesis is that this reduction in kidney transplant institutional profitability is related to aggressive donor and recipient practices. The study population included all adults with Medicare insurance who received a kidney transplant at our center between 1999 and 2005. Adopting the hospital perspective, multi-variate linear regression models to determine the independent effects of donor and recipient characteristics and era effects on total reimbursements and total hospital margin. We note statistically significant decreased medical center incremental margins in cases with ECDs (-$5887) and in cases of DGF (-4937). We also note an annual change in the medical center margin is independently associated with year and changes at a rate of -$5278 per year, related to both increasing costs and decreasing Medicare reimbursements. The financial loss associated with patient DGF and the use of ECD kidneys may resonate with other centers, and could hinder efforts to expand kidney transplantation within the United States. The Centers for Medicare and Medicaid Services (CMS) should consider risk-adjusted reimbursement for kidney transplantation.


Asunto(s)
Centros Médicos Académicos/economía , Trasplante de Riñón/economía , Medicare/economía , Adulto , Economía Hospitalaria , Femenino , Humanos , Reembolso de Seguro de Salud , Masculino , Michigan , Donantes de Tejidos , Estados Unidos
10.
Transplant Proc ; 37(2): 1214-6, 2005 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-15848673

RESUMEN

Steroids are a mainstay in liver transplantation for induction and maintenance immunosuppression but are associated with significant adverse effects. While prior studies have successfully limited the use of steroids, whether complete steroid avoidance will improve outcomes remains unclear. To further evaluate the need for steroids, consenting patients who underwent liver transplantation between June 2002 and May 2004 were entered into a prospective, randomized trial to receive either standard therapy (tacrolimus, mycophenolate mofetil, steroid induction/maintenance) or complete steroid avoidance (standard therapy without steroid induction/maintenance). Clinically suspected rejection was confirmed by biopsy and treated with pulse steroid therapy. Outcomes were compared on an intention to treat basis. Of the 72 patients enrolled, 36 (50%) were randomized to the steroid avoidance group with a mean follow up of 412 +/- 41 days. Donor and recipient characteristics were similar between groups. The steroid avoidance group was more likely to have significant infections (52% vs 28%, P = .03). There was a trend toward an increased rate of acute rejection (25% vs 14%, P = .23). Twelve of 36 recipients (33%) enrolled in the steroid avoidance group later received steroids. The incidence of recurrent hepatitis C was similar between groups. The 1-year patient (90% vs 83%, P = .44) and graft survivals (90% vs 81%, P = .27) were similar between groups. These data suggest complete steroid avoidance in liver transplantation results in acceptable patient and graft survival. However, the potential long-term benefits of steroid avoidance, including a decrease in severity of recurrent hepatitis C, remain under investigation.


Asunto(s)
Corticoesteroides/efectos adversos , Anticuerpos Monoclonales/uso terapéutico , Inmunosupresores/uso terapéutico , Trasplante de Hígado/fisiología , Proteínas Recombinantes de Fusión/uso terapéutico , Basiliximab , Femenino , Estudios de Seguimiento , Rechazo de Injerto/epidemiología , Supervivencia de Injerto , Hepatitis C/cirugía , Humanos , Trasplante de Hígado/inmunología , Trasplante de Hígado/mortalidad , Masculino , Persona de Mediana Edad , Recurrencia , Análisis de Supervivencia , Resultado del Tratamiento
11.
Transplantation ; 66(9): 1201-7, 1998 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-9825818

RESUMEN

BACKGROUND: Biliary complications occur frequently after liver transplantation, and many are historically related to T tubes. Stents placed through the donor cystic duct have been used to attempt to reduce tube-related complications yet maintain access to the biliary tree. METHODS: The outcomes of all liver transplant procedures performed at the University of Michigan between December 7, 1990 (when transcystic stenting was first used), and April 6, 1995, were analyzed retrospectively. Preoperative, perioperative, and postoperative variables were studied in relationship to biliary complications. The management of complications was also reviewed. RESULTS: A total of 291 transplants qualified for study. The overall biliary complication rate was 25%, with no difference between the 237 patients who received transcystic stents, the 28 who received T tubes, and the 26 who received no tube. Among the complications patients experienced, 65% had stricture(s), 44% had stone or sludge formation, and 40% had a leak. Complications attributable solely to transcystic stents occurred in 4% of cases. Advanced age was the only preoperative variable associated with complications. Primary sclerosing cholangitis was associated with intrahepatic strictures, and prolonged cold ischemia time and rejection were associated with stone or sludge formation. Nonoperative management had the highest success rate for anastomotic stricture (76%) and the lowest for intrahepatic strictures (65%). Only one death was directly attributable to a biliary complication. CONCLUSION: Transcystic stenting reduces the incidence of significant tube-related complications, but not the frequency of other biliary complications. Biliary complications can usually be managed percutaneously or endoscopically, although intrahepatic strictures and large, early leaks frequently require reoperation. Aggressive, early management of these complications can reduce excess mortality to less than 2%.


Asunto(s)
Enfermedades de las Vías Biliares/etiología , Quiste del Colédoco/cirugía , Trasplante de Hígado/efectos adversos , Stents , Adolescente , Adulto , Enfermedades de las Vías Biliares/epidemiología , Enfermedades de las Vías Biliares/mortalidad , Femenino , Humanos , Incidencia , Masculino , Atención Perioperativa , Cuidados Preoperatorios , Tasa de Supervivencia
12.
Transplantation ; 67(5): 741-8, 1999 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-10096532

RESUMEN

BACKGROUND: Antigen specific allograft tolerance is induced in mice by anti-CD2 plus anti-CD3epsilon monoclonal antibody (mAb) treatment. Because anti-CD2 mAb inhibits several aspects of anti-CD3epsilon driven T cell activation, we investigated what components of T cell activation are required or may be dispensed with for tolerance induction. Anti-CD3epsilon-mediated T cell activation depends on FcgammaR interactions. METHODS: To assess the role of FcgammaR-mediated T cell activation in tolerance induction, FcgammaR binding IgG or non-binding IgG3 anti-CD3epsilon mAbs were examined. RESULTS: These mAbs, administered in conjunction with anti-CD2, were equally effective in inducing tolerance. Moreover, in vivo administration of a blocking mAb directed against the FcgammaR, or the use of allograft recipients deficient in FcgammaR, had no effect on tolerance induction. Blocking IL-2 using mAb directed against IL-2 or IL-2R also did not prevent the induction of tolerance. These results suggest that complete T cell activation was not required for tolerance induction. However, substitution of a partially activating mAb, directed against the T cell receptor (TCR) beta subunit for anti-CD3epsilon, failed to synergize with anti-CD2 mAb to induce tolerance. The anti-TCRbeta mAb and anti-CD3epsilon mAb were found to differentially down modulate expression of TCR/CD3 complex subunits. In particular, anti-CD3epsilon caused transient down modulation of the TCRbeta receptor subunit and the TCRzeta signaling module, and this pattern was enhanced and prolonged by anti-CD2. Anti-TCRbeta caused persistent TCRzeta modulation but no TCRbeta modulation, and anti-CD2 did not influence this pattern. CONCLUSIONS: These results suggest that, although full T cell activation is not required for the induction of tolerance by anti-CD2 plus anti-CD3epsilon mAb, a signal transduction pathway that is associated with TCRbeta and TCRzeta expression, and, specifically, is perturbed by mAb binding of the CD3epsilon epitope, is critical.


Asunto(s)
Anticuerpos Monoclonales/inmunología , Antígenos CD2/inmunología , Complejo CD3/inmunología , Tolerancia Inmunológica , Receptores de Antígenos de Linfocitos T alfa-beta/inmunología , Animales , Femenino , Activación de Linfocitos , Ratones , Ratones Endogámicos BALB C , Ratones Endogámicos C57BL , Ratones Endogámicos CBA , Receptores de IgG/inmunología
13.
Transplantation ; 70(7): 1098-100, 2000 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-11045649

RESUMEN

BACKGROUND: Acute rejection (AR) remains a major risk factor for the development of chronic renal allograft failure (CAF), which is a major cause of late graft loss. With the introduction of several newer immunosuppressive agents (e.g., mycophenolate mofetil, tacrolimus and neoral) acute rejection rates have been steadily decreasing. However, the incidence of CAF has not decreased as dramatically as the incidence of acute rejection. One possible explanation is that the impact of AR on CAF is changing. The goal of this study was to analyze the relative impact of AR era on the development of CAF. METHODS: We evaluated 63,045 primary renal transplant recipients reported to the USRDS from 1988 to 1997. CAF was defined as graft loss after 6 months posttransplantation, censored for death, acute rejection, thrombosis, infection, surgical complications, or recurrent disease. A Cox proportional hazard model correcting for 15 possible confounding factors evaluated the relative impact of AR on CAF. The era effect (years 1988-1989, 1990-1991, 1992-1993, 1994-1995 and 1996-1997) was evaluated by an era versus AR interaction term. RESULTS: An AR episode within the first 6 months after transplantation was the most important risk factor for subsequent CAF (RR=2.4, CI 2.3-2.5). Compared with the reference group (1988-89 with no rejection), having an AR episode in 1988-89, 1990-1991, 1992-1993, 1994-1995, and 1996-1997, conferred a 1.67, 2.35, 3.4, 4.98 and 5.2-fold relative risk for the subsequent development of CAF (P<0.001). CONCLUSIONS: Independently of known confounding variables, the impact of AR on CAF has significantly increased from 1988 to 1997. This effect may in part explain the relative lack of improvements in long term renal allograft survival, despite a decline in AR rates.


Asunto(s)
Rechazo de Injerto/fisiopatología , Trasplante de Riñón/inmunología , Enfermedad Aguda , Adulto , Femenino , Supervivencia de Injerto/fisiología , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Tiempo , Trasplante Homólogo/inmunología
14.
Transplantation ; 61(8): 1180-8, 1996 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-8610415

RESUMEN

Orthotopic liver transplantation is an established therapy for end-stage liver disease. This study evaluated the range of cardiovascular abnormalities in patients undergoing evaluation for orthotopic liver transplantation and determined the prognostic implications of abnormal echocardiographic features, including ischemia during dobutamine stress echocardiography, in predicting postoperative cardiac events. Two-dimensional echocardiography was performed in 190 patients for assessment of left ventricular function, valvular pathology, and pulmonary hypertension. Dobutamine stress echocardiography was performed in 165 patients for evaluation of inducible ischemia. Contrast echocardiography for detection of intrapulmonary shunting was performed in 125 patients at rest and in 99 during dobutamine stress. Left ventricular dysfunction, significant valvular regurgitation, and inducible ischemia were identified in <1O% of patients. Pulmonary hypertension, left ventricular hypertrophy and > or = moderate intrapulmonary shunting were present in 12%, 16%, and 26% of patients, respectively. Severe intrapulmonary shunting predicted death prior to transplantation (P=0.01). Of the 71 transplanted patients, major perioperative events included global left ventricular dysfunction in four patients and myocardial infarction in one patient with normal coronary arteries. No preoperative echocardiographic parameters, including ischemia on dobutamine echocardiography, predicted these perioperative events. No cardiac events related to obstructive coronary artery disease occurred in the 154 patients without ischemia on dobutamine stress echocardiography. The majority of patients with end-stage liver disease, including those with alcoholic cirrhosis, have normal cardiac function on two-dimensional echocardiography. Severe intrapulmonary shunting portends a poor prognosis in patients awaiting transplantation. A negative dobutamine stress echocardiogram appears useful in excluding patients at risk for perioperative cardiac events related to obstructive coronary artery disease.


Asunto(s)
Enfermedades Cardiovasculares/diagnóstico , Ecocardiografía/métodos , Fallo Hepático/complicaciones , Adulto , Anciano , Enfermedades Cardiovasculares/complicaciones , Dobutamina , Femenino , Humanos , Fallo Hepático/terapia , Trasplante de Hígado , Masculino , Persona de Mediana Edad , Pronóstico
15.
Transplantation ; 72(2): 284-90, 2001 Jul 27.
Artículo en Inglés | MEDLINE | ID: mdl-11477354

RESUMEN

BACKGROUND: Laparoscopic live donor nephrectomy for renal transplantation is being performed in increasing numbers with the goals of broadening organ supply while minimizing pain and duration of convalescence for donors. Relative advantages in terms of recovery provided by laparoscopy over standard open surgery have not been rigorously assessed. We hypothesized that laparoscopic as compared with open surgical live donor nephrectomy provides briefer, less intense, and more complete convalescence. METHODS: Of 105 volunteer, adult, potential living-renal donors interested in the laparoscopic approach, 70 were randomly assigned to undergo either hand-assisted laparoscopic or open surgical live donor nephrectomy at a single referral center. Objective data and subjective recovery information obtained with telephone interviews and validated questionnaires administered 2 weeks, 6 weeks, and 6-12 months postoperatively were compared between the 23 laparoscopic and 27 open surgical patients. RESULTS: There was 47% less analgesic use (P=0.004), 35% shorter hospital stay (P=0.0001), 33% more rapid return to nonstrenuous activity (P=0.006), 23% sooner return to work (P=0.037), and 73% less pain 6 weeks postoperatively (P=0.004) in the laparoscopy group. Laparoscopic patients experienced complete recovery sooner (P=0.032) and had fewer long-term residual effects (P=0.0015). CONCLUSIONS: Laparoscopic donor nephrectomy is associated with a briefer, less intense, and more complete convalescence compared with the open surgical approach.


Asunto(s)
Laparoscopía/métodos , Donadores Vivos , Nefrectomía/métodos , Actividades Cotidianas , Adulto , Anciano , Conducción de Automóvil , Convalecencia , Femenino , Estudios de Seguimiento , Humanos , Entrevistas como Asunto , Tiempo de Internación , Masculino , Persona de Mediana Edad , Nefrectomía/rehabilitación , Dolor Postoperatorio/epidemiología , Probabilidad , Encuestas y Cuestionarios , Factores de Tiempo , Recolección de Tejidos y Órganos/métodos
16.
Am J Kidney Dis ; 36(1): 153-9, 2000 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-10873885

RESUMEN

Hypertension (HTN) and diabetes mellitus (DM) predispose to systemic atherosclerosis with renal involvement. The prevalence of HTN and DM in cadaveric renal donors (affected donors) and the results of transplantation are unknown. We investigated these issues with national data from the US Renal Data System. A total of 4,035 transplants from affected donors were matched 1:1 with unaffected controls according to donor age and race, recipient race, and year of transplantation. Graft and patient survival were estimated. Among the 25,039 solitary renal transplantations performed between July 1, 1994, and June 30, 1997, cadaveric renal transplants from donors with HTN accounted for 15%, and donors with DM, 2%. Programs with 1-year cadaveric renal graft survival rates greater than 90% had 50% less affected donors compared with programs having 1-year cadaveric renal graft survival rates of 85% or less. Compared with donor-age-matched controls, transplants from affected donors were at minimally increased risk for primary nonfunction, delayed graft function, and acute rejection. Three-year graft survival rates were 71% in affected donor organs and 75% in controls (P = 0.001). Compared with controls, duration of HTN was an independent risk factor for graft survival (3-year graft survival rates, 75% versus 65%; relative risk = 1.36 for HTN >10 years; P < 0.001). A substantial fraction of cadaveric renal donors have preexisting HTN. Programs transplanting fewer affected donor kidneys had better than average results. Because the negative impact of donor HTN and DM on transplant outcome was of moderate degree except when the duration of donor HTN was greater than 10 years, use of affected donors should not be discouraged, but graft and patient survival analyses should account for their presence.


Asunto(s)
Diabetes Mellitus , Supervivencia de Injerto , Hipertensión , Trasplante de Riñón , Donantes de Tejidos , Adolescente , Adulto , Factores de Edad , Anciano , Cadáver , Causas de Muerte , Femenino , Rechazo de Injerto , Humanos , Trasplante de Riñón/mortalidad , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo , Análisis de Supervivencia , Tasa de Supervivencia , Resultado del Tratamiento
17.
Surgery ; 118(4): 783-6; discussion 786-8, 1995 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-7570337

RESUMEN

BACKGROUND: Long-term side effects of corticosteroids (CSs) result in > major morbidity for recipients of orthotopic liver transplants (OLT). We instituted a program of CS withdrawal among OLT recipients to quantify the contribution of CS to adverse clinical sequelae and to determine whether long-term CS administration is necessary to avoid rejection. METHODS: Recipients who had normal allograft function on CS, cyclosporine, and azathioprine more than 1 year after OLT were offered CS withdrawal during 12 to 22 weeks. Patients underwent routine clinical monitoring and laboratory studies. Continuous variables were compared by paired t test analysis. RESULTS: CSs were discontinued in 51 recipients; 45 (88%) of 51 patients remain steroid-free after a mean follow-up of 13.8 months (range, 4 to 36). CS therapy was reinstituted in 6 patients who had abnormal transaminase levels during routine follow-up. Among the patients who remain off CS, there were no significant changes in blood pressure, transaminase, alkaline phosphatase, bilirubin, or glucose levels during the study period. Mean number of blood pressure medications decreased from 0.7 +/- 0.1 to 0.4 +/- 0.1 (p = 0.007). Cholesterol decreased from 217 +/- 8 mg/dl on CS to 204 +/- 9 mg/dl at 1 month (p = 0.0001), 183 +/- 10 mg/dl at 3 months (p = 0.0001), 198 +/- 8 mg/dl at 6 months (p = 0.04), 213 +/- 11 mg/dl at 12 months (p = 0.01), 209 mg/dl +/- 16 at 18 months (p = 0.02), and 183 +/- 19 mg/dl at 24 months (p = 0.2) off CS. Weight loss occurred in 88% of patients and averaged 9.5 pounds. CONCLUSIONS: CS therapy can be successfully withdrawn without precipitating rejection in liver transplant recipients who have stable graft function 1 year after OLT. The incidence and severity of hypertension and hypercholesterolemia are reduced in patients whose CSs have been withdrawn.


Asunto(s)
Corticoesteroides/administración & dosificación , Rechazo de Injerto/prevención & control , Inmunosupresores/administración & dosificación , Trasplante de Hígado , Corticoesteroides/efectos adversos , Hormona Adrenocorticotrópica , Azatioprina/administración & dosificación , Ciclosporina/administración & dosificación , Diabetes Mellitus Tipo 1/inducido químicamente , Rechazo de Injerto/epidemiología , Humanos , Hipercolesterolemia/inducido químicamente , Hipercolesterolemia/prevención & control , Hipertensión/inducido químicamente , Hipertensión/prevención & control , Hepatopatías/cirugía , Pruebas de Función Hepática
18.
Arch Surg ; 130(5): 538-42; discussion 542-3, 1995 May.
Artículo en Inglés | MEDLINE | ID: mdl-7748094

RESUMEN

OBJECTIVE: To determine long-term results and durability of parathyroidectomy in patients with chronic renal failure and renal transplant recipients. DESIGN: Retrospective chart review and structured telephone interviews. SETTING: Tertiary-care academic medical center. PATIENTS: Ninety-one consecutive patients (80 undergoing long-term dialysis, 11 with posttransplant hyperparathyroidism). Mean follow-up was 8 years (minimum follow-up, 2 years; longest follow-up, 25 years). The most common indications for operation were bone pain (70% [56/80]) and weakness (46% [37/80]) in patients with renal failure and hypercalcemia (91% [10/11]) in renal transplant recipients. INTERVENTION: Subtotal parathyroidectomy without remnant gland implantation. MAIN OUTCOME MEASURES: Postoperative morbidity and mortality, relief and recurrence of symptoms. RESULTS: Symptoms were successfully ameliorated in 95% (86/91) of patients. Clinically significant complications occurred in 5% (5/91) of patients (one patient each with wound hematoma, wound infection, and permanent recurrent laryngeal nerve paralysis and two patients with permanent hypoparathyroidism). Recurrence occurred in five (5%) of 91 patients. Two of these patients required four operations each to eradicate all hyperfunctioning accessory glands. The other three recurrences were caused by hyperplasia of the remnant gland left in the neck. These were easily treated by simple excision, with no morbidity. The actuarial rate of recurrent hyperparathyroidism was 4.1% at 1 year and 11.7% at 20 years. Overall hospital mortality was 3% (3/91). None of the deaths was directly attributable to parathyroidectomy. CONCLUSIONS: We recommend subtotal parathyroidectomy without remnant implantation as a safe and durable intervention for hyperparathyroidism associated with renal failure and following renal transplantation. This intervention is associated with an acceptably low recurrence rate over extremely long periods of follow-up.


Asunto(s)
Hiperparatiroidismo/cirugía , Fallo Renal Crónico/terapia , Trasplante de Riñón , Paratiroidectomía/métodos , Diálisis Renal , Adulto , Femenino , Estudios de Seguimiento , Humanos , Hiperparatiroidismo/etiología , Fallo Renal Crónico/complicaciones , Trasplante de Riñón/efectos adversos , Masculino , Persona de Mediana Edad , Paratiroidectomía/efectos adversos , Complicaciones Posoperatorias/epidemiología , Recurrencia , Estudios Retrospectivos
19.
Transplant Proc ; 35(4): 1491-3, 2003 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-12826202

RESUMEN

BACKGROUND: Venous thrombosis remains an important cause of pancreatic graft loss. Nevertheless, reports are scarce of treatment alternatives to complete graft removal. We describe a case of surgical salvage of a partial pancreatic graft thrombosis. METHODS: We used descriptive retrospective analysis. RESULTS: A 36-year-old patient with juvenile-onset diabetes mellitus and previous living related renal transplant received a cadaveric pancreas transplant in the right iliac fossa with enteric exocrine drainage and standard vascular anastomosis. Two days after discharge from the hospital, he presented with severe right upper quadrant pain, nausea, vomiting, fever, and leukocytosis. He was taken to the operating room for exploration. The tail of the pancreas, which was kinked under the gallbladder, was necrotic and excised. The remainder of the pancreas looked normal. The patient recovered well from surgery and was discharged home 7 days later. CONCLUSIONS: Partial pancreatectomy is an acceptable surgical alternative for incomplete graft thrombosis.


Asunto(s)
Trasplante de Páncreas/efectos adversos , Trombosis/etiología , Trombosis/cirugía , Adulto , Cadáver , Diabetes Mellitus Tipo 1/cirugía , Nefropatías Diabéticas/cirugía , Humanos , Trasplante de Hígado , Masculino , Páncreas , Pancreatectomía , Terapia Recuperativa/métodos , Donantes de Tejidos , Trasplante Homólogo , Resultado del Tratamiento
20.
Postgrad Med ; 85(1): 205-8, 211-5, 1989 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-2911539

RESUMEN

The burn patient initially requires many of the same measures as any other trauma patient. Both depth and surface extent of the burn injury should be evaluated. Evaluation for smoke inhalation is important, since this is prevalent and life-threatening among burn victims. A treatment plan begins with a realistic appraisal of the probability of survival. Once goals of management have been established, treatment is aimed at both physiologic and aesthetic rehabilitation.


Asunto(s)
Quemaduras/terapia , Quemaduras/complicaciones , Quemaduras/patología , Quemaduras por Inhalación/diagnóstico , Quemaduras por Inhalación/terapia , Humanos , Métodos , Resucitación
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