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Intestine remains the least frequently transplanted solid organ, although the survival and quality-of-life benefits of transplant to individuals with irreversible intestinal failure have been well demonstrated. The trend seen over the past 15 years of fewer listings and fewer transplants appears to be continuing, most noticeably in infants, children, and adolescents. There were only 146 additions to the intestine waiting list in 2022, and the proportion of adult candidates continues to increase, so that now 61% of the intestine waiting list are adult candidates. There has been little change in the distribution by sex, race and ethnicity, or primary diagnosis on the waiting list, or for those receiving transplant. The transplant rate for adults has decreased to 55.6 transplants per 100 patient-years, but the pediatric transplant rate remains relatively stable at 22.8 transplants per 100 patient-years. The decrease in transplant rates for adults is primarily the result of falling rates for those listed for combined intestine-liver, and this is reflected in the pretransplant mortality rates, which are twice as high for candidates in need of both organs compared with those listed for intestine alone. Overall, intestine transplant numbers decreased to a total of 82 intestine transplants in 2022, only one above the lowest ever value of 81 in 2019. No major changes were seen in the immunosuppression protocols, with most recipients having induction therapy and tacrolimus-based maintenance. Graft failure rates appear to have improved at 1, 3, and 5 years for intestine without liver, but this is not seen for combined intestine-liver. Graft and patient survival are better for pediatric recipients compared with adult recipients for both liver-inclusive and liver-exclusive transplant. Rates of posttransplant lymphoproliferative disorder are higher for recipients of intestine without liver.

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BACKGROUND: Brazil ranks second in the absolute number of transplants. However, the supply remains insufficient to meet the demands, resulting in a lengthy waitlist. This study aimed to analyze whether the frequency of human leukocyte antigen (HLA) and the value of calculated panel reactive antibody (cPRA) would influence the waiting time for kidney transplantation. METHODS: The HLA-A, B, and -DRB1 frequencies and the cPRA value were analyzed in 11,186 kidney transplant candidates included in the waitlist from 2006 to 2016. RESULTS: The most frequent alleles were HLA-A*02, HLA-B*35, and HLA-DRB1*13. The overall mean length of stay on the list was 986 ± 1001 days. The mean waiting time for the three most frequent alleles of the HLA-A and B loci showed no significant difference when compared with the least frequent alleles; however, for the HLA-DRB1 locus, the most frequent alleles showed a shorter waiting time. In the association between HLA and PRA, the average length of stay on the list increased according to the candidate's degree of sensitization, regardless of the analyzed HLA frequency. CONCLUSION: The length of stay on the waitlist is influenced by the frequency of the HLA alleles of the DRB1 locus and the degree of sensitization.

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INTRODUCTION: Kidney transplantation is the treatment of choice for end-stage renal disease (ESRD). Since March 2020, transplant activity in Mexico has been affected due to the COVID-19 pandemic. OBJECTIVE: The aim of the study was to determine the impact on mortality of patients on the waiting list (WL) for cadaveric donor kidney transplantation in a referral hospital in Yucatán, due to suspension of activities due to the pandemic. MATERIAL AND METHODS: Patients over 18 years of age on the waiting list for kidney transplantation at this hospital. In the event of a patient's death, the cause was investigated, especially if it was associated with COVID-19. A two-tailed p ≤ 0.05 was considered significant in all analyzes. RESULTS: The odds ratio (OR) of death from COVID-19 in a patient with ESRD in the WL in 2020 was OR = 5.04 (95% CI: 1.65-7.14, p = 0.023). The OR of dying with ESRD in the WL with a delay in the follow-up visits was OR = 6.59 (95% CI: 2.7-16.28, p = 0.008). CONCLUSION: The probability of death of a patient with ESRD with delayed follow-up visits and transplant retention is statistically higher than the probability of death from COVID-19.

INTRODUCCIÓN: El trasplante renal es el tratamiento de elección de la enfermedad renal en etapa terminal (ERT). Desde marzo de 2020, la actividad de trasplantes en México se ha visto afectada debido a la pandemia de COVID-19. OBJETIVO: Determinar el impacto en la mortalidad de pacientes en lista de espera (LE) para trasplante renal de donante cadavérico en un hospital de referencia en Yucatán, por suspensión de actividades debido a la pandemia. MATERIAL Y MÉTODOS: Pacientes > 18 años en LE para trasplante renal en este hospital. En caso de muerte de un paciente, se investigó la causa, especialmente si estaba asociada a COVID-19. Un valor de p de dos colas ≤ 0.05 se consideró significativo en todos los análisis. RESULTADOS: La razón de probabilidad de muerte por COVID-19 en un paciente con ERT en la LE en 2020 fue OR = 5.04 (IC 95%: 1.65-7.14, p = 0.023). La razón de probabilidad de morir con ERT en la LE con retraso en las consultas de seguimiento fue de OR = 6.59 (IC 95%: 2.7-16.28, p = 0.008). CONCLUSIÓN: La probabilidad de muerte de un paciente con ERT en la LE con retraso en las consultas de seguimiento y retención del trasplante es estadísticamente más alta que la probabilidad de muerte por COVID-19.

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There has been just over 30 years of experience in clinical intestine transplant. A rise in demand until 2007 with improving transplant outcomes preceded a subsequent fall in demand due, at least in part, to improvements in pretransplant care of patients with intestinal failure. Over the past 10 to 12 years, there has been no suggestion of an increase in demand and, particularly for adult transplant, there may be a continued trend toward fewer additions to the waiting list and fewer transplants, especially in those needing combined intestine-liver transplant. In addition, over the same period there has been no noticeable improvement in graft survival, with 1- and 5-year graft failure rates averaging 21.6% and 52.5%, respectively, for intestine-alone transplants and 28.6% and 47.2%, respectively, for combined intestine-liver allografts.

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Objetivo: Evaluar la capacidad resolutiva de la Unidad de Atención Primaria en Oftalmología para disminuir la lista de espera oftalmológica no incluida en el Plan de Garantías Explícitas en Salud (GES) de la Región de Ñuble, entre el año 2017 y el 2019. Métodos: Se realizó un estudio cuantitativo, no experimental, de corte transversal, donde se evaluaron los registros estadísticos mensuales y la lista de espera oftalmológica No GES de la región de Ñuble, generada entre el año 2017 y el 2019. Resultados: Se realizó un promedio de 1 875 (± 983) consultas médicas y 3 407(± 1 625) consultas de Tecnólogo Médico anualmente, con un nivel de resolutividad del 84 por ciento: el 82 por ciento para resolución de vicio de refracción; el 77,7 por ciento (p < 0,001) de las interconsultas por vicio de refracción y el 80,1 por ciento (p < 0,001) de otros diagnósticos se resolvieron en menos de 150 días. Las Unidades de Atención Primaria en Oftalmología en estudio demostraron capacidad resolutiva similar a estudios anteriores, con una disminución de los tiempos de espera para la atención oftalmológica en atención primaria. Conclusiones: Las Unidades de Atención Primaria en Oftalmología tienen una alta capacidad resolutiva, menores tiempos de espera, mejoran el acceso y la oportunidad a través de un modelo integral de trabajo en equipo que puede ser replicado a nivel mundial y también en otras especialidades de salud(AU)

Objective: Evaluate the resolution capacity of ophthalmic primary care units to shorten the ophthalmic waiting list not included in the Explicit Health Guarantees Plan (GES) of Ñuble Region in the period 2017-2019. Methods: A quantitative cross-sectional non-experimental evaluation was conducted of the monthly statistical records and the No GES ophthalmic waiting list of the Ñuble Region generated in the period 2017-2019. Results: An average 1 875 (± 983) medical consultations and 3 407 (± 1 625) consultations with a medical technologist were held annually, with a resolution level of 84 percent: 82 percent for refraction vice resolution; 77.7 percent (p < 0.001) of the interconsultations for refractive vice and 80.1 percent (p < 0.001) for other diagnoses were resolved in less than 150 days. The ophthalmic primary care units studied displayed a resolution capacity similar to previous studies, with a reduction in the waiting time for ophthalmic primary care. Conclusions: Ophthalmic primary care units display a high resolution capacity, shorter waiting times, improved access and opportunity through a comprehensive teamwork model which may be replicated globally and in other medical specialties(AU)

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Highly sensitized (HS) patients accumulate on deceased donor kidney transplantation (DDKT) waitlists worldwide due to matching difficulty and inequity of allocation policies. Current situation of HS patients on KT waitlist in Brazil has not been published. All patients enrolled on the KT waitlist of the State of São Paulo from 2002 to 2017 were retrospectively assessed. Patients were divided into eight groups according to their degree of sensitization, PRA of 0%, >0-40%, >40-80%, >80-85%, >85-90%, >90-95%, >95-98% and > 98%. Cumulative incidence curves for transplantation or mortality/removal from waitlist were estimated by competing risk. Among 50,249 waitlisted candidates, 1247 prioritized, 2467 with age < 18 or > 75 years and 4152 submitted to living-donor KT were excluded from the analysis, remaining 42,383 patients. There were 29,664(70%) PRA 0%, 5611(13.2%) PRA > 0-40%, 3442(8.2%) PRA > 40-80%, 507(1.2%) PRA > 80-85%, 564(1.3%) PRA > 85-90%, 825(1.9%) PRA >90-95%, 859(2%) PRA > 95-98% and 911(2.2%) PRA > 98%. There was a progressive increase in the need of prioritization, waiting time for KT or on waitlist and time on dialysis as PRA increased (p < 0.001). Probability of DDKT clearly increased as PRA decreased so that PRA 0% candidates were much more likely to be transplanted compared to PRA > 98% patients(HR:13.02, p < 0.001). Waiting list mortality/removal was higher among PRA > 0-40%(HR1.05,p = 0.03), PRA > 90-95%(HR:1.10,p = 0.05), PRA > 95-98%(HR:1.26,p < 0.001) and PRA > 98%(HR:1.09,p = 0.05) patients compared to PRA zero candidates. HS patients in Sao Paulo-Brazil required greater prioritization due to lack of venous access, longer dialysis and waitlist times, lower probability of DDKT and higher rates of waitlist mortality/removal. We confirmed the disparity of access to KT among HS patients in Sao Paulo-Brazil, indicating the need of new strategies that optimize transplantation for this subcategory of patients.

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Objective To measure and document the clinical impact of the waiting time for surgical treatment of patients with spinal deformities in a quaternary center in Brazil. Methods In total, 59 patients with spinal deformity waiting for surgery on our hospital's list were evaluated to observe the impact of the waiting time on the progression of the deformity. Patient evaluation was performed using the SRS-22r questionnaire for health-related quality of life (HRQL) and radiographic images to evaluate the deformity of the spine at the time the patients were included in the waiting list and at the most recent appointment. The radiographic parameters selected for comparison were: Cobb angle of the primary and secondary curves, coronal alignment, apical vertebral translation, pelvic obliquity, sagittal vertebral axis, kyphosis (T5-T12), and lordosis (L1-S1). Results Low HRQL scores according to the SRS-22r questionnaire were observed in patients waiting for surgery. The radiographic parameters showed progression of the deformity on the initial evaluation when compared with the most recent follow-up evaluation. Conclusion The patients waiting for surgical treatment of spinal deformities in our center showed relatively low HRQL scores and radiographic progression of the deformity.

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RESUMEN Objetivos: Evaluar frecuencia de hisopado, casos positivos y tasa de letalidad por SARS-CoV-2 en pacientes trasplantados, en lista de espera o en evaluación en un Hospital Público de la Argentina. Material y métodos: Se realizó un análisis retrospectivo de los pacientes de la unidad (trasplantados, en lista de espera o en evaluación para trasplante) hasta el 30 de septiembre de 2020. Se buscó en forma individualizada cada paciente en el SINTRA, en bases de datos de pacientes de una unidad de trasplante y en el sistema SISA, para buscar: realización de hisopados, porcentaje de positividad de los mismos, mortalidad general y aquella vinculada a SARS-CoV-2. Se consideró edad, sexo, tiempo en diálisis, condición de diabético, hipertensión y enfermedad pulmonar obstructiva crónica. Se realizó análisis estadístico mediante Student, Mann Whitney y Chi cuadrado según correspondiere. Resultados: Durante 2020, estuvieron en seguimiento, en la Unidad de Trasplante Renal, un total de 1513 pacientes entre trasplantados renales en seguimiento (n=515), pacientes en lista de espera renal (n= 413) y pacientes en evaluación para trasplante (n=585). Se registraron un total de 103 casos positivos de COVID-19, sobre 477 hisopados realizados (positividad del 32,51%). La tasa de letalidad global fue del 21,88%, variando según el paciente estuviera en lista de espera (22,73%), en evaluación de trasplante (30%) o trasplantado (35,48%). Estas diferencias no alcanzaron significación estadística. Conclusiones: Se presenta un análisis descriptivo de los efectos de la pandemia sobre nuestra población. Es importante notar que nuestro centro atiende un porcentaje elevado de pacientes de bajos recursos y un área geográfica extensa, por lo cual los resultados pueden haber sido sesgados por estas características. En nuestra población trasplantada se observó un incremento de 10 veces la letalidad observada en la población general. La presencia de un mayor grado de inmunosupresión y factores de riesgo (diabetes, edad, hipertensión) podrían explicar lo observado.

ABSTRACT Objectives: Assess frequency of swabbing, positive and lethality rate cases of SARS-CoV-2 in transplant patients on the waiting list or evaluation in a Public Hospital of Argentina. Methods: A retrospective analysis was carried out of the patients in the unit (transplanted, on the waiting list or under evaluation for transplantation) until September 30, 2020. Each patient was searched individually in the SINTRA, in databases of patients of a transplant unit and in the SISA system, to find: swabbing, percentage of tests positivity, general mortality and that related to SARS-CoV-2. Age, sex, time on dialysis, diabetic condition, hypertension and chronic obstructive pulmonary disease were considered. Statistical analysis was performed using Student, Mann Whitney and Chi square as appropriate. Results: During 2020, a total of 1,513 patients were under follow-up in the Kidney Transplant Unit, including kidney transplants under follow-up (n=515), patients on the renal waiting list (n=413) and patients under evaluation for transplantation (n=585). A total of 103 positive cases of COVID-19 were registered, out of 477 swabs performed (positivity of 32.51%). The overall case fatality rate was of the 21.88%, varying according to the patient was on the waiting list (22.73%) in transplant evaluation (30%) or transplanted (35.48%). These differences did not reach statistical significance. Conclusions: A descriptive analysis of the effects of the pandemic on our population is presented. It is important to note that our center cares for a high percentage of low-income patients and a large geographic area, so the results may have been biased by these characteristics. In our transplanted population, a 10-fold increase in mortality observed in the general population was observed. The presence of a higher degree of immunosuppression and risk factors (diabetes, age, hypertension) could explain what was observed.

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Abstract Objective To measure and document the clinical impact of the waiting time for surgical treatment of patients with spinal deformities in a quaternary center in Brazil. Methods In total, 59 patients with spinal deformity waiting for surgery on our hospital's list were evaluated to observe the impact of the waiting time on the progression of the deformity. Patient evaluation was performed using the SRS-22r questionnaire for health-related quality of life (HRQL) and radiographic images to evaluate the deformity of the spine at the time the patients were included in the waiting list and at the most recent appointment. The radiographic parameters selected for comparison were: Cobb angle of the primary and secondary curves, coronal alignment, apical vertebral translation, pelvic obliquity, sagittal vertebral axis, kyphosis (T5-T12), and lordosis (L1-S1). Results Low HRQL scores according to the SRS-22r questionnaire were observed in patients waiting for surgery. The radiographic parameters showed progression of the deformity on the initial evaluation when compared with the most recent follow-up evaluation. Conclusion The patients waiting for surgical treatment of spinal deformities in our center showed relatively low HRQL scores and radiographic progression of the deformity.

Resumo Objetivo Medir e documentar o impacto clínico do tempo de espera para tratamento cirúrgico de pacientes com deformidades na coluna vertebral em um centro quaternário no Brasil. Métodos No total, 59 pacientes com deformidade espinhal à espera de cirurgia na lista do nosso hospital foram avaliados para observar o impacto dos tempos de espera na progressão da deformidade. A avaliação do paciente foi realizada utilizando o questionário SRS-22r para qualidade de vida relacionada à saúde (QLRS), e imagens radiográficas para avaliar a deformidade da coluna vertebral quando os pacientes foram incluídos na lista de espera e na consulta mais recente. Os parâmetros radiográficos selecionados para comparação foram: ângulo de Cobb de curvas primárias e secundárias, alinhamento coronal, translação de vértebra apical, obliquidade pélvica, eixo vertebral sagital, cifose (T5-T12), e lordose (L1-S1). Resultados Baixos escores de QLRS segundo o questionário SRS-22r foram observados em pacientes que aguardavam cirurgia. Os parâmetros radiográficos mostraram progressão da deformidade na avaliação inicial em comparação com a avaliação de seguimento mais recente. Conclusão Os pacientes que aguardavam tratamento cirúrgico de deformidade espinhal em nosso centro apresentaram os escores de QLRS relativamente baixos e progressão radiográfica da deformidade.

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PURPOSE: There are no criteria to establish priority for bariatric surgery candidates in the public health system in several countries. The aim of this study is to identify preoperative characteristics that allow predicting the success after bariatric surgery. MATERIALS AND METHODS: Four hundred and sixty-one patients submitted to Roux-en-Y gastric bypass were included. Success of the surgery was defined as the sum of five outcome variables, assessed at baseline and 12 months after the surgery: excess weight loss, use of continuous positive airway pressure (CPAP) or bilevel positive airway pressure (BiPAP) as a treatment for obstructive sleep apnea (OSA), daily number of antidiabetics, daily number of antihypertensive drugs, and all-cause mortality. Partial least squares (PLS) regression and multiple linear regression were performed to identify preoperative predictors. We performed a 90/10 split of the dataset in train and test sets and ran a leave-one-out cross-validation on the train set and the best PLS model was chosen based on goodness-of-fit criteria. RESULTS: The preoperative predictors of success after bariatric surgery included lower age, presence of non-alcoholic fatty liver disease and OSA, more years of CPAP/BiPAP use, negative history of cardiovascular disease, and lower number of antihypertensive drugs. The PLS model displayed a mean absolute percent error of 0.1121 in the test portion of the dataset, leading to accurate predictions of postoperative outcomes. CONCLUSION: This success index allows prioritizing patients with the best indication for the procedure and could be incorporated in the public health system as a support tool in the decision-making process.

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