Biomechanical changes in keratoconus after customized stromal augmentation.

PURPOSE: To verify corneal biomechanical changes, poststromal augmentation using myopic small-incision lenticule extraction's (SMILEs) lenticules in advanced keratoconus (KCN) through Corvis ST (Oculus, Wetzlar, Germany). MATERIALS AND METHODS: A clinical trial enrolled 22 advanced KCN patients. We implanted lenticules exceeding 100 µ according to a nomogram and evaluated biomechanical factors through Corvis ST at 3-, 6-, and 24-month postimplantation. We examined parameters during the first applanation (A1), second applanation (A2), highest concavity (HC)/max concavity events, and Vinciguerra screening parameters, as recently established criteria derived from the ideal blend of diverse biomechanical and ocular factors and formulated through the application of logistic regression. Regression analyses explored relationships with age, mean keratometry value, thickness, sphere, cylinder, and best-corrected visual acuity. RESULTS: Patients were well matched for age, intraocular pressure, and central corneal thickness (CCT). The mean spherical equivalent decreased from -13.48 ± 2.86 Diopters (D) to -8.59 ± 2.17 D (P < 0.007), and mean keratometry decreased from 54.68 ± 2.77 D to 51.95 ± 2.21 D (P < 0.006). Significant increases were observed in HC time (HCT), Radius-central curvature radius at the HC state-, peak distance (PD) during HC state, CCT, first applanation time, and stiffness parameter (A1T and SP-A1), whereas HC deformation amplitude, maximum deformation amplitude ratio at 2 mm, Corvis Biomechanical Index (CBI), integrated radius (IR), second applanation deformation amplitude (A2DA), first applanation velocity and deflection amplitude (A1V and A1DeflA) significantly decreased postlenticule implantation. Multivariable regression revealed age positively correlated with SP-A1 (P = 0.003) and negatively with HC delta Arc length (P = 0.007). Mean K positively correlated with CCT (P = 0.05) and negatively with CBI (P = 0.032). Best-corrected visual acuity positively correlated with HCT (P = 0.044), and the cylinder positively correlated with PD (P = 0.05) and CCT (P = 0.05) whereas negatively with IR (P = 0.025). CONCLUSIONS: Stromal augmentation using myopic SMILE lenticules induces significant corneal biomechanical changes in KCN.

Understanding the dynamics of deceased organ donation and utilization in Colombia.

Objective: To obtain a comprehensive overview of organ donation, organ utilization, and discard in the entire donation process in Colombia. Methods: A retrospective study of 1 451 possible donors, distributed in three regions of Colombia, evaluated in 2022. The general characteristics, diagnosis, and causes of contraindication for potential donors were described. Results: Among the 1 451 possible donors, 441 (30.4%) fulfilled brain death criteria, constituting the potential donor pool. Families consented to organ donation in 141 medically suitable cases, while 60 instances utilized legal presumption, leading to 201 eligible donors (13.9%). Of those, 160 (11.0%) were actual donors (in whom operative incision was made with the intent of organ recovery or who had at least one organ recovered). Finally, we identified 147 utilized donors (10.1%) (from whom at least one organ was transplanted). Statistically significant differences were found between age, sex, diagnosis of brain death, and donor critical pathway between regions. A total of 411 organs were transplanted from 147 utilized donors, with kidneys being the most frequently procured and transplanted organs, accounting for 280 (68.1%) of the total. This was followed by 85 livers (20.7%), 31 hearts (7.5%), 14 lungs (3.4%), and 1 pancreas (0.2%). The discard rate of procured deceased donors was 8.1%. Conclusions: About one-tenth of donors are effectively used for transplantation purposes. Our findings highlight areas of success and challenges, providing a basis for future improvements in Colombia.

What do we know about eligible organ donors? Analysis of data from a local Registry.

BACKGROUND: The imbalance between supply and demand for organ donations remains a hot topic for international debate. Brain-dead organ donors (DBDs) constitute the majority of organ donations in Poland. OBJECTIVES: To identify the factors that guided intensivists in qualifying a brain-dead patient as a potential organ donor, and whether the factors that significantly influenced the decision to qualify constituted an actual contraindication. MATERIAL AND METHODS: We performed a retrospective study based on data from the Silesian ICU Registry from 2010-2020 and publicly available information from Poltransplant. We compared the demographic and clinical characteristics of patients diagnosed with brain death who were identified as eligible and ineligible organ donors. RESULTS: Out of 25,465 patients enrolled in the Silesian ICU Registry, brain death was diagnosed in 385 (1.51%) study participants, and 61 of the records were excluded due to data incompleteness. In the remaining group (n = 324), there were 201 men and 123 women. Of them, only 180 study participants were reported as eligible donors (55.5%). Six patients had absolute contraindications to organ donation. CONCLUSIONS: A relatively small number of patients diagnosed with brain death were qualified by intensivists as eligible organ donors, with a limited number of medical factors influencing this decision. This means that other non-medical factors may affect the qualification of DBDs for organ procurement.

Global legislation regulating the donation, procurement and distribution processes of organs and tissues from deceased donors for transplants: A scoping review.

Introduction: Organ transplantation is one of the most successful advances in modern medicine. However, a legal system is necessary for its practice to be free from ethical flaws and to respect donors, recipients, and family members. Objective: To map the global legislation regulating the donation, capture and distribution processes of organs and tissues from deceased donors for transplants. Method: A scoping review according to the Joanna Briggs Institute was conducted in the following databases: Medline, CINAHL, Virtual Health Library, SCOPUS, Web of Science, Science Direct, and EMBASE, as well as gray literature, and reported according to the PRISMA extension for scoping reviews. Results: We identified 3302 records, of which 77 were analyzed which enabled mapping the type of consent adopted and the existence of current legislation for harvesting organs and tissues after circulatory and brain death. Conclusion: Opt-out consent predominates in Europe, and there is harvesting after brain and circulatory death. Opt-out predominates in the Americas, while Opt-in and harvesting of organs and tissues after brain death predominate in Asia and Oceania. The procurement of organs and tissues from deceased donors is practically non-existent in Africa.

Organization of Hannover Skin Bank: Sterile culture and procurement protocols for viable cryopreserved allogeneic skin grafts of living donors.

Preserved allogeneic donor skin still represents one of the gold standard therapies in temporary wound coverage in severely burned patients or chronic wounds. Allogeneic skin grafts are currently commercially available as cryo- or glycerol-preserved allografts through skin tissue banks all over the world. Most of the skin tissue banks rely on human cadaveric skin donations. Due to the chronic shortage of human allogeneic transplants, such as skin, and increasing costs in the procurement of allografts from other skin tissue banks, Hannover Medical School has been building up its own skin tissue bank based on allogeneic skin grafts from living donors who underwent surgical treatment (i.e., body-contouring procedures, such as abdominioplasties). This article presents procedures and protocols for the procurement and processing of allogeneic skin grafts according to national legislation and European regulations and guidelines. Beside protocols, initial microbiological data regarding the sterility of the harvested grafts are presented. The results currently form the basis for further investigations as well as clinical applications. In summary, a microbiological testing and acceptance procedure is presented that ensures adequate patient safety and skin viability.

Recusa familiar para doação de córneas para transplante: fatores associados e tendência / Negativa familiar para donación de córneas para trasplante: factores asociados y tendencia / Family refusal to donate a cornea for transplantation: associated factors and trends

Resumo Objetivo Analisar a recusa familiar de doação de córnea para transplante em uma Organização de Procura de Órgãos. Métodos Estudo quantitativo do tipo transversal sobre as recusas de córnea de doadores em situação de morte encefálica. A fonte de dados foi constituída pelos Termos de Autorização de Doação de Órgãos e Tecidos firmados entre janeiro de 2001 a dezembro de 2020 em uma Organização de Procura de Órgãos. Os dados foram coletados, tabulados e analisados de forma descritiva e inferencial. O presente estudo foi aprovado pelo Comitê de Ética em Pesquisa. Resultados Dos 2.447 Termos de Autorização de Doação de Órgãos e Tecidos firmados no período, 620 (25.34%) recusaram a doação de córneas. Com relação à tendência temporal de recusas de doação de córneas, o único período que apresentou significância foi de 2001 a 2009, quando as faixas etárias de zero a 11 anos e 12 a 19 anos demonstraram tendência decrescente, e a faixa etária maior ou igual a 60 anos, mostrou-se crescente. No período total de 2001 a 2020, as faixas etárias dos 20 a 40 anos, 41 a 59 anos e maior ou igual a 60 anos apresentaram, 48%, 59% e 73%, respectivamente, menores chances de recusa da doação de córneas. Conclusão A faixa etária apresentou associação com a recusa, tendo em vista que os indivíduos de maior idade apresentaram maiores índices.

Resumen Objetivo Analizar la negativa familiar de donación de córneas para trasplante en una Organización de Búsqueda de Órganos. Métodos: Estudio cuantitativo tipo transversal sobre la negativa de córnea de donantes en situación de muerte encefálica. La fuente de datos estuvo compuesta por los Términos de Autorización de Donación de Órganos y Tejidos firmados entre enero de 2001 y diciembre de 2020 en una Organización de Búsqueda de Órganos. Se recopilaron los datos, luego se tabularon y se analizaron de forma descriptiva e inferencial. El presente estudio fue aprobado por el Comité de Ética en Investigación. Resultados De los 2447 Términos de Autorización de Donación de Órganos y Tejidos firmados en el período, 620 (25,34 %) negaron la donación de córneas. Con relación a la tendencia temporal de negativas de donación de córneas, el único período que presentó significación fue de 2001 a 2009, cuando los grupos de edad de 0 a 11 años y de 12 a 19 años demostraron una tendencia decreciente, y el grupo de edad mayor o igual a 60 años se mostró creciente. En el período total de 2001 a 2020, los grupos de edad de 20 a 40 años, de 41 a 59 años y mayor o igual a 60 años presentaron un 48 %, un 59 % y un 73 %, respectivamente, menor probabilidad de negativa de donación de córneas. Conclusión El grupo de edad presentó relación con la negativa, considerando que los individuos de mayor edad presentan mayores índices.

Abstract Objective To analyze family refusals to donate a cornea for transplantation in an Organ Procurement Organization. Methods This was a quantitative cross-sectional study on corneal donation refusals from potential brain-dead donors. The data source was based on the Terms of Authorization for Donation of Organs and Tissues signed from January 2001 to December 2020 in an Organ Procurement Organization. Data were collected, tabulated, and analyzed in a descriptive and inferential manner. The present study was approved by the Research Ethics Committee. Results Of the 2,447 Terms of Authorization for Donation of Organs and Tissues signed in the above period, 620 (25.34%) of them refused to donate a cornea. Regarding the time trend of corneal donation refusals, the period 2001-2009 was the only one that showed significance, when the 0-11 and 12-19 age groups showed a decreasing trend and that of 60 years or older showed an increasing trend. In the period 2001-2020, the age groups of 20-40, 41-59, and 60 years or older had lower rates of refusal to donate a cornea (48%, 59%, and 73%, respectively). Conclusion The age group is associated with refusal because older individuals had the highest refusal rates.

Principais motivos de descarte de córneas para transplante na Paraíba: por que o anti-HBc merece atenção?* / Main reasons for discarding corneas for transplant in Paraíba: why does anti-HBc deserve attention?*

RESUMO Objetivo: Identificar o perfil dos doadores de tecidos oculares humanos na área de atuação do Banco de Olhos da Paraíba, destacando o impacto da sorologia positiva para hepatite B no descarte dos tecidos para transplante. Métodos: O estudo é transversal e utilizou dados do Banco de Olhos da Paraíba entre janeiro de 2013 e dezembro de 2022. Dados sobre procedência, idade, sexo, causa do óbito, tempo entre óbito e enucleação, resultados sorológicos e motivo de descarte das córneas dos doadores foram coletados. Resultados: O maior motivo de descarte foi por sorologia positiva (56,5%), sendo positivadas as sorologias positivas para hepatite B e HBsAg em 11,1% e 4,75% dos pacientes, respectivamente. Conclusão: A sorologia positiva para hepatite B como um critério de descarte absoluto é responsável por grande parcela de descartes, apesar da pouca informação sobre suas repercussões e representação de infectividade nos receptores do transplante.

ABSTRACT Objective: To identify the profile of human ocular tissue donors in the area covered by the Eye Bank of Paraíba (PB), highlighting the impact of positive serology for hepatitis B (anti-HBc) in the disposal of tissues for transplantation. Methods: This is a cross-sectional that uses data from the Eye Bank of Paraíba (PB) between January 2013 and December 2022. Data on origin, age, sex, cause of death, time between death and enucleation, serological results, and reason for discarded donor corneas were collected. Results: The main reason for discarding was due to positive serology (56.5%), with positive anti-HBc and HBsAg serology in 11.1% and 4.75% of patients, respectively. Conclusion: Anti-HBc positive serology as an absolute disposal criterion is responsible for great part of disposals, despite little information about its repercussions and representation of infectivity in transplant recipients.

Understanding the dynamics of deceased organ donation and utilization in Colombia / Examen de la dinámica de la donación y utilización de órganos de personas fallecidas en Colombia / Entendendo a dinâmica da doação e do aproveitamento de órgãos de pessoas falecidas na Colômbia

ABSTRACT Objective. To obtain a comprehensive overview of organ donation, organ utilization, and discard in the entire donation process in Colombia. Methods. A retrospective study of 1 451 possible donors, distributed in three regions of Colombia, evaluated in 2022. The general characteristics, diagnosis, and causes of contraindication for potential donors were described. Results. Among the 1 451 possible donors, 441 (30.4%) fulfilled brain death criteria, constituting the potential donor pool. Families consented to organ donation in 141 medically suitable cases, while 60 instances utilized legal presumption, leading to 201 eligible donors (13.9%). Of those, 160 (11.0%) were actual donors (in whom operative incision was made with the intent of organ recovery or who had at least one organ recovered). Finally, we identified 147 utilized donors (10.1%) (from whom at least one organ was transplanted). Statistically significant differences were found between age, sex, diagnosis of brain death, and donor critical pathway between regions. A total of 411 organs were transplanted from 147 utilized donors, with kidneys being the most frequently procured and transplanted organs, accounting for 280 (68.1%) of the total. This was followed by 85 livers (20.7%), 31 hearts (7.5%), 14 lungs (3.4%), and 1 pancreas (0.2%). The discard rate of procured deceased donors was 8.1%. Conclusions. About one-tenth of donors are effectively used for transplantation purposes. Our findings highlight areas of success and challenges, providing a basis for future improvements in Colombia.

RESUMEN Objetivo. Presentar una descripción integral de la donación, utilización y descarte de órganos en todo el proceso de donación en Colombia. Métodos. Estudio retrospectivo de 1 451 donantes posibles, distribuidos en tres regiones de Colombia, que fueron evaluados en el 2022. Se describen las características generales, el diagnóstico y las causas de contraindicación de los donantes potenciales. Resultados. De los 1 451 donantes posibles, 441 (30,4%) cumplían con los criterios de muerte encefálica y constituyeron el conjunto de donantes potenciales. Las familias consintieron la donación de órganos en 141 casos aptos desde el punto de vista médico, mientras que en 60 casos se recurrió a la presunción legal, con lo que se llegó a 201 donantes aptos (13,9%). De estos, 160 (11,0%) fueron donantes reales (en los que se les practicó una incisión quirúrgica para la extracción de órganos o se obtuvo al menos un órgano). En última instancia, hubo 147 donantes utilizados (10,1%) (de los que se trasplantó al menos un órgano). Se observaron diferencias estadísticamente significativas entre las regiones en cuanto a edad, sexo, diagnóstico de muerte encefálica y vía crítica del donante. Se trasplantaron un total de 411 órganos procedentes de 147 donantes utilizados; los riñones fueron los órganos obtenidos y trasplantados con mayor frecuencia, ya que supusieron 280 (68,1%) del total de órganos, seguidos del hígado (85, 20,7%), el corazón (31 , 7,5%), los pulmones (14, 3,4%) y el páncreas (1, 0,2%). La tasa de descarte de los donantes fallecidos disponibles fue del 8,1%. Conclusiones. Aproximadamente una décima parte de los donantes son utilizados, de hecho, para realizar trasplantes. Estos datos destacan las áreas en las que se han obtenido buenos resultados y aquellas en las que se presentan desafíos, lo cual proporciona una base para futuras mejoras en Colombia.

RESUMO Objetivo. Obter uma visão geral e abrangente da doação, do aproveitamento e do descarte de órgãos em todo o processo de doação na Colômbia. Métodos. Estudo retrospectivo de 1 451 possíveis doadores em três regiões da Colômbia que foram avaliados em 2022. Foram descritas as características gerais, o diagnóstico e os motivos para a contraindicação de potenciais doadores. Resultados. Dentre os 1 451 possíveis doadores, 441 (30,4%) preencheram os critérios de morte encefálica, formando o grupo de potenciais doadores. Em 141 casos considerados clinicamente aptos, as famílias consentiram com a doação de órgãos, e em 60 casos utilizou-se o princípio da presunção legal, resultando em 201 doadores elegíveis (13,9%). Desses, 160 (11,0%) foram doadores efetivos (ou seja, doadores nos quais foi feita uma incisão cirúrgica com a intenção de remover um órgão ou pessoas com pelo menos um órgão removido). Por fim, foram identificados 147 doadores utilizados (10,1%) (ou seja, que doaram pelo menos um órgão que foi transplantado). Foram encontradas diferenças estatisticamente significantes entre idade, sexo, diagnóstico de morte encefálica e itinerário crítico de doação entre as regiões. Um total de 411 órgãos foram transplantados de 147 doadores utilizados. Os rins foram os órgãos mais frequentemente removidos e transplantados, representando 280 (68,1%) do total, seguido de 85 fígados (20,7%), 31 corações (7,5%), 14 pulmões (3,4%) e 1 pâncreas (0,2%). A taxa de descarte de doadores falecidos com órgãos removidos foi de 8,1%. Conclusões. Cerca de um décimo dos doadores são efetivamente usados para fins de transplante. Nossos achados destacam áreas de sucesso e desafios, oferecendo uma base para futuras melhorias na Colômbia.

Characterization of cornea donors at a tissue center in the city of Medellin, Colombia.

The cornea transplant is considered the most frequently performed type of transplant in the world, with a demand that has been increasing in recent years. An observational descriptive study was conducted, focusing on the ocular tissue extracted from cadaveric donors from January 2019 to December 2021 at the Red Cross Eye Bank in Medellin, Colombia. This is the first epidemiological characterization of corneal donor tissues within the eye banks of our city, where high rates of violence-related deaths explain that tissue donors are mostly young individuals. This, in turn, results in excellent counts of endothelial cells and tissue viability in their microscopic studies. Additionally, there are lower rates of discarded tissues compared to similar studies.

Recommendations for SARS-CoV-2 testing and organ procurement from deceased donors in the Republic of Korea.

We present a summary of the evidence on testing for severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and organ procurement from deceased donors and provide recommendations based on current clinical data and the guidelines from major transplant organizations. Because of the limited historical experience with coronavirus disease 2019 (COVID-19), certain recommendations in this document are based on theoretical rationales rather than clinical data. The recommendations in this manuscript may be subject to revision as subsequent clinical studies provide definitive evidence regarding COVID-19 in organ procurement.

Barriers to the identification of possible organ donors among brain-injured patients admitted to intensive care units.

Background: Improving organ donation rates requires better detection of possible organ donors, which in turn necessitates identifying barriers preventing the identification of possible organ donors. The objectives of this study were to determine the actual rate of possible deceased organ donors among nonreferred cases and to identify barriers to their identification as possible donors. Methods: This retrospective observational study used 6 months of data collected from two intensive care units (ICUs). Possible organ donors were defined as patients with a Glasgow Coma Scale score <5 and evidence of severe neurological damage. Barriers that led to the nonidentification of these patients as possible organ donors were also identified. Results: Fifty-six of 819 patients admitted to the ICUs during the study period were detected as possible organ donors, representing a 6.83% possible organ donor detection rate. Nonclinical barriers to the identification of possible organ donors were found to be more significant than clinical barriers (55% vs. 45%, respectively). The most significant nonclinical barrier was an unknown reason, despite patients being medically suitable for deceased organ donation and fulfilling the criteria for possible organ donor classification. Unresolved sepsis was the main clinical barrier. Conclusions: The significant rate of unreferred possible deceased organ donors found in this study reveals the need to increase awareness and knowledge among clinicians of the proper detection of possible donors at an early stage to avoid the loss of possible deceased organ donors, and thereby increase the deceased organ donation rate in Malaysian hospitals.

Surgical outcomes of suprafascial and subfascial radial forearm free flaps in head and neck reconstruction.

BACKGROUND: Conventional radial forearm free flaps (RFFFs) are known to be safe, but can result in donor site complications. Based on our experiences with suprafascial and subfascial RFFFs, we evaluated the safety of flap survival and surgical outcomes. METHODS: This was a retrospective study of head and neck reconstructions using RFFFs from 2006 to 2021. Thirty-two patients underwent procedures using either subfascial (group A) or suprafascial (group B) dissection for flap elevation. Data were collected on patient characteristics, flap size, and donor and recipient complications, and the two groups were compared. RESULTS: Thirteen of the 32 patients were in group A and 19 were in group B. Group A included 10 men and three women, with a mean age of 56.15 years, and group B included 16 men and three women, with a mean age of 59.11 years. The mean defect areas were 42.83 cm² and 33.32 cm², and the mean flap sizes were 50.96 cm² and 44.54 cm² in groups A and B, respectively. There were 13 donor site complications: eight (61.5%) in group A and five (26.3%) in group B. Flexor tendon exposure occurred in three patients in group A and in none in group B. All flaps survived completely. A recipient site complication occurred in two patients (15.4%) in group A and three patients (15.8%) in group B. CONCLUSIONS: Complications and flap survival were similar between the two groups. However, tendon exposure at the donor site was less prevalent in the suprafascial group, and the treatment period was shorter. Based on our data, suprafascial RFFF is a reliable and safe procedure for reconstruction of the head and neck.

Left Ventricular Dysfunction Associated With Brain Death: Results From the Donor Heart Study.

BACKGROUND: Left ventricular dysfunction in potential donors meeting brain death criteria often results in nonuse of donor hearts for transplantation, yet little is known about its incidence or pathophysiology. Resolving these unknowns was a primary aim of the DHS (Donor Heart Study), a multisite prospective cohort study. METHODS: The DHS enrolled potential donors by neurologic determination of death (n=4333) at 8 organ procurement organizations across the United States between February 2015 and May 2020. Data included medications administered, serial diagnostic tests, and transthoracic echocardiograms (TTEs) performed: (1) within 48 hours after brain death was formally diagnosed; and (2) 24±6 hours later if left ventricular (LV) dysfunction was initially present. LV dysfunction was defined as an LV ejection fraction <50% and was considered reversible if LV ejection fraction was >50% on the second TTE. TTEs were also examined for presence of LV regional wall motion abnormalities and their reversibility. We assessed associations between LV dysfunction, donor heart acceptance for transplantation, and recipient 1-year survival. RESULTS: An initial TTE was interpreted for 3794 of the 4333 potential donors by neurologic determination of death. A total of 493 (13%) of these TTEs showed LV dysfunction. Among those donors with an initial TTE, LV dysfunction was associated with younger age, underweight, and higher NT-proBNP (N-terminal pro-B-type natriuretic peptide) and troponin levels. A second TTE was performed within 24±6 hours for a subset of donors (n=224) with initial LV dysfunction; within this subset, 130 (58%) demonstrated reversibility. Sixty percent of donor hearts with normal LV function were accepted for transplant compared with 56% of hearts with reversible LV dysfunction and 24% of hearts with nonreversible LV dysfunction. Donor LV dysfunction, whether reversible or not, was not associated with recipient 1-year survival. CONCLUSIONS: LV dysfunction associated with brain death occurs in many potential heart donors and is sometimes reversible. These findings can inform decisions made during donor evaluation and help guide donor heart acceptance for transplantation.

Causas de exclusión de donantes renales vivos en el servicio de trasplante de un hospital de tercer nivel del noroeste de México

Objetivo: Identificar las causas de exclusión de los donantes renales vivos en un centro hospitalario de tercer nivel en el noroeste de México. Materiales y métodos: Estudio de tipo observacional, transversal, descriptivo, retrospectivo. Se realizó la evaluación de los expedientes clínicos de los candidatos vivos para donación renal, que abarcó el periodo comprendido entre el 1 de enero de 2019 y el 31 de diciembre de 2021. Resultados: De los 30 expedientes seleccionados, solo se eligieron 2 (6,6 %) donadores, es decir, existió un índice de rechazo de 28 (93,3 %) de los potenciales candidatos. La edad promedio fue de 40,7 años; al dividirlos en grupos de edad, se observó que el 7,44 % fueron ≤39 años; el 5,31 %, ≥50 años; y el 4,25 %, de 40 a 49 años. Dentro de las principales patologías que originaron el rechazo del donador vivo se encuentran las enfermedades crónicas, como afección renal desconocida, obesidad, diabetes mellitus, hipertensión arterial sistémica y cardiopatías, que representaron el 60,7 %. El deseo de donar es más frecuente entre consanguíneos que en no consanguíneos. En el caso de los consanguíneos, es decir, hermanos, padres, hijos, tíos, etc., el 64,2 % fue rechazado; en los no consanguíneos, el 34,7 %, que incluía a esposos y amigos. Conclusiones: Los resultados obtenidos sobre el índice de masa corporal (IMC) mostraron que el sobrepeso y la obesidad fueron las principales causas de exclusión, circunstancia que es particular en nuestro país respecto a su perfil epidemiológico. La cantidad de donantes vivos en nuestro centro se redujo porque la mayor parte de la población no es sana, padece obesidad y ello repercute al momento de presentarse como candidato a donante.

Objective: To identify the causes for exclusion of living kidney donors at a third-level hospital in northwestern Mexico. Materials and methods: An observational, cross-sectional, descriptive and retrospective study, in which the medical records of candidates for living kidney donation were evaluated from January 1, 2019 to December 31, 2021. Results: Out of the 30 selected records, only 6.6 % (2) were chosen as donors, i.e., the rejection rate of the potential candidates was 93.3 % (28). The average age was 40.7 years; when divided into age groups, it was observed that 7.44 % were ≤ 39 years, 5.31 % were ≥ 50 years and 4.25 % were in the 40-49 age range. The main pathologies that caused the rejection of living donors were chronic diseases such as unknown renal disease, obesity, diabetes mellitus, systemic hypertension and heart diseases, which accounted for 60.7 %. The desire to donate was more frequent among blood relatives than non-blood relatives. In the case of blood relatives, i.e., siblings, parents, children, uncles, aunts, etc., 64.2 % were rejected, while 34.7 % of non-blood relatives, including spouses and friends, were rejected. Conclusions: Based on the body mass index (BMI), the results showed that overweight and obesity were the main causes of exclusion, a situation that is consistent with the Mexican epidemiological profile. The number of living donors at our center has been reduced because most of the population is not healthy and has obesity, which affects the willingness to be a candidate for living kidney donation.

Caracterização do processo de doação de órgãos em uma região do nordeste brasileiro / Caracterización del proceso de donación de órganos en una región de Brasil / Caracterization of the organ donation process in a region of northeast Brazil

Introdução: O processo de doação de órgãos e tecidos é definido por ações a fim de transformar um Potencial Doador (PD) em doador efetivo e inicia-se com o diagnóstico de morte encefálica. Objetivo: Analisar o perfil clínico e sociodemográfico dos potenciais doadores de órgãos, como também os fatores que influenciam na doação de órgãos. Métodos: Trata-se de uma pesquisa quantitativa, transversal, retrospectiva e analítica realizada através da coleta de dados de 455 prontuários de pacientes com diagnóstico de Morte Encefálica, de uma Região do Nordeste brasileiro, utilizando formulário estruturado. Posteriormente realizaram-se análises descritivas e nas associações entre as variáveis independentes e dependente, utilizou-se o teste qui-quadrado de Pearson Resultados: As faixas etárias de maior incidência foram entre 21 a 40 anos e 41 a 60 anos, com 33,8% cada, prevalecendo o sexo masculino (64,1%). Em relação à causa da morte, predominou o Trauma Cranioencefálico com 36,5%. Foram entrevistados 83,3% dos familiares e desses, 53,5% autorizaram a doação. Quanto à relação das respostas das entrevistas com os familiares e o sexo dos PD o sexo masculino se destacou com 59,01% das entrevistas positivas, quanto a entrevista e faixa etária, não foram encontradas diferenças significativas. Correlacionando o resultado das entrevistas familiares e a causa da morte, 40,63% destas tinham como causa o trauma cranioencefálico, e desse total, 63,63% tiveram a doação autorizada. Conclusão: A maioria dos doadores efetivos foram jovens e do sexo masculino, com prevalência do trauma craneoencefálico como causa da morte encefálica e da aceitação familiar para a doação.

Introducción: El proceso de donación de órganos y tejidos se define por las acciones encaminadas a transformar a una persona donante potencial (DP) en donante efectiva. Este proceso comienza con el diagnóstico de muerte encefálica. Objetivo: Analizar el perfil clínico y sociodemográfico de potenciales donantes de órganos, así como los factores que influyen en la donación de órganos. Métodos: Se trata de una investigación cuantitativa, transversal, retrospectiva y analítica realizada a partir de la recopilación de datos de 455 prontuarios de pacientes con diagnóstico de muerte encefálica, en una región del Nordeste de Brasil, utilizando un formulario estructurado. Posteriormente, se realizaron análisis descriptivos y, en las asociaciones entre las variables independiente y dependiente, se utilizó la prueba chi-cuadrado de Pearson Resultados: Los grupos de edad con mayor incidencia fueron de 21 a 40 años y de 41 a 60 años, con un 33.8 % cada uno, con predominio del sexo masculino (64.1 %). En cuanto a la causa de muerte, predominó el trauma craneoencefálico con un 36.5 %. Se entrevistó al 83.3 % de familiares y, de este grupo, el 53.5 % autorizó la donación. En cuanto a la relación entre las respuestas de las entrevistas a familiares y el sexo del TP, se destacó el sexo masculino con un 59.01 % de las entrevistas positivas; en cuanto a la entrevista y grupo de edad no se encontraron diferencias significativas. Correlacionando los resultados de las entrevistas familiares y la causa de muerte, el 40.63 % fue por trauma craneoencefálico y, de ese total, el 63.63 % tenía autorizada la donación. Conclusión: Los donantes más efectivos fueron jóvenes y varones, con predominio del traumatismo craneoencefálico como causa de muerte encefálica y aceptación familiar de la donación.

Introduction: The process of organ and tissue donation is defined by actions to transform a Potential Donor (PD) into an effective donor and begins with the diagnosis of brain death. Objective: To analyze the clinical and sociodemographic profile of potential organ donors, as well as the factors that influence organ donation. Methods: This is a quantitative, cross-sectional, retrospective, and analytical research carried out in a region of Northeast Brazil by collecting data from 455 medical records of patients with brain death, who were diagnosed using a structured form. Subsequently, descriptive analyzes were carried out and for the associations between the independent and dependent variables, the Pearson's chi-square test was used. Results: The age groups with the highest incidence were between 21 to 40 years old and 41 to 60 years old, with a 33.8 % each, with a predominance of males (64.1%). Regarding the cause of death, traumatic brain injury was the most common with a 36.5% of the sample. From the 83.3% of the family members that were interviewed, 53.5% of them authorized the donation. Male potential donors constituted the 59.01% of the authorized donations (positive interviews). There was no relationship between the interview results and the age group of the PD. When correlating the results of family interviews and the cause of death, 40.63% of them were caused by traumatic brain injury and, out of this total, 63.63% had the donation authorized. Conclusion: The most effective donors were young and male whose cause of brain death was traumatic brain injury and whose families allowed the donation.

The Significance of the Nucleic Acid Test (NAT) to Prevent Viral Contamination in Musculoskeletal Tissue Transplantation.

Objective The present study aims to highlight the significance of the nucleic acid test (NAT) for musculoskeletal tissue donation and to compare the sensitivity of this test on the different available platforms. Method The present study is a retrospective survey in a human tissue bank database and an integrative literature review encompassing the last 10 years. The PubMed portal and the SCOPUS, CINAHL, and Web of Science databases were queried for articles. Results We found no specific studies on the use and sensitivity of NAT in braindead tissue donors. The information presented in the present study consists of specific contents intended for the Brazilian Blood Transfusion Network (Hemorrede Transfusional Nacional, in Portuguese) and internal retrospective data from a tissue bank located at a city in the state of São Paulo, Brazil. Conclusions The NAT is effective in blood samples from living patients. However, since biochemical reactions in braindead patients can be different, specific research, platforms, or both are crucial to tissue banks.

Effects of donor source on transcriptomic profiles of human kidney tissue.

Normal human tissue is a critical reference control in biomedical research. However, the type of tissue donor can significantly affect the underlying biology of the samples. We investigated the impact of tissue donor source type by performing transcriptomic analysis on healthy kidney tissue from three donor source types: cadavers, organ donors, and normal-adjacent tissue from surgical resections of clear cell renal cell carcinomas, and we compared the gene expression profiles to those of clear cell renal cell carcinoma samples. Comparisons among the normal samples revealed general similarity, with notable differences in gene expression pathways involving immune system and inflammatory processes, response to extracellular stimuli, ion transport, and metabolism. When compared to tumors, the transcriptomic profiles of the normal adjacent tissue were highly similar to the profiles from cadaveric and organ donor tissue samples, arguing against the presence of a field cancerization effect in clear cell renal cell carcinoma. We conclude that all three normal source types are suitable for reference kidney control samples, but important differences must be noted for particular research areas and tissue banking strategies.

The Significance of the Nucleic Acid Test (NAT) to Prevent Viral Contamination in Musculoskeletal Tissue Transplantation / A importância da realização do teste de ácidos nucleicos (NAT) para a prevenção de contaminação viral nos transplantes de tecidos musculoesqueléticos

Abstract Objective The present study aims to highlight the significance of the nucleic acid test (NAT) for musculoskeletal tissue donation and to compare the sensitivity of this test on the different available platforms. Method The present study is a retrospective survey in a human tissue bank database and an integrative literature review encompassing the last 10 years. The PubMed portal and the SCOPUS, CINAHL, and Web of Science databases were queried for articles. Results We found no specific studies on the use and sensitivity of NAT in braindead tissue donors. The information presented in the present study consists of specific contents intended for the Brazilian Blood Transfusion Network (Hemorrede Transfusional Nacional, in Portuguese) and internal retrospective data from a tissue bank located at a city in the state of São Paulo, Brazil. Conclusions The NAT is effective in blood samples from living patients. However, since biochemical reactions in braindead patients can be different, specific research, platforms, or both are crucial to tissue banks.

Resumo Objetivo Evidenciar a importância da realização do teste de ácido nucleico (NAT, na sigla em inglês) para doação de tecidos musculoesqueléticos, assim como comparar a sensibilidade deste exame nas diferentes plataformas existentes no mercado. Método Trata-se de um levantamento retrospectivo no banco de dados de um determinado Banco de Tecidos Humanos e de uma revisão integrativa da literatura, operacionalizada nos últimos 10 anos. As buscas de artigos ocorreram no portal PubMed e nas bases de dados SCOPUS, CINAHL e Web of Science. Resultados Não foram encontrados estudos específicos sobre a utilização e a sensibilidade do exame NAT em pacientes doadores de tecidos com morte encefálica (ME), sendo as informações apresentadas no presente estudo conteúdos específicos destinados à Hemorrede Transfusional Nacional e aos dados retrospectivos internos de um Banco de Tecidos do interior do estado de São Paulo, Brasil. Conclusões O exame NAT se apresenta efetivo em amostras de sangue de pacientes vivos. Porém, reações bioquímicas em pacientes com condições de ME podem se apresentar de formas diferenciadas, tornando-se indispensáveis a realização de pesquisas específicas e/ou a indicação de plataformas aos Bancos de Tecidos.