Comparative life cycle analysis between commercial porcelain stoneware and new ones designed by using volcanic scraps.

To achieve carbon neutrality by 2050, many companies have started implementing sustainability policies. The aim of this work, as result of collaboration between Universities and companies, is to assess the environmental impacts associated with the production of alternative formulations of porcelain stoneware. The proposed formulations contain extraction scraps and chamotte and have promising technological properties. A comparative analysis of the life cycle in three different scenarios was carried out to assess the environmental footprint of the final products. The analyzed scenarios were a glazed porcelain stoneware (which was taken as a reference and is commercially available), a porcelain stoneware containing pumice scraps, and one containing volcanic lapillus scraps. It was observed that the transportation of raw materials has the largest environmental impact, followed by the production and extraction of the raw materials themselves. From the performed analysis, it was possible to observe that by replacing the currently used materials by the ones hereby studied, environmental benefits can be obtained. In particular, depending on the considered pollutant, the environmental impact can be reduced between a minimum of about 8 % (Freshwater Aquatic Ecotoxicity category) to a maximum of 48 % (Acidification category). In a time when raw materials supply is difficult, the use of scraps, which would otherwise be disposed of, is particularly interesting and can lead to the production of an environmentally friendly product.

Analysis of Sleep Quality in People With Dementia: A Preliminary Study.

Background: Between 25% and 60% of subjects with dementia have shown sleep disturbances. Causes are diverse and seem to be related to factors such as aging, the presence of psychiatric diseases, or the consumption of drugs. This study aims to determine the influence of dementia on sleep quality and to analyze the factors that influence sleep quality in subjects ≥65 years. Methods: Thirty-one subjects were studied (15 living with dementia). PSQI was administered and statistical analysis compared the results among categories of other variables (age, gender, coffee consumption, drugs, BMI, psychiatric diseases). This study took place in Spain. Results: A prevalence of 46.7% of sleep disturbances was found in subjects with dementia. No significant differences were observed in the total score obtained in the PSQI between the dementia group (6.06 ± 3.78 points) and the group without dementia (7 ± 5.65 points). A significant inverse relationship was found between the sleep quality and the number of daily drugs and the presence of psychiatric diseases. Conclusion: Poor sleep quality affects people with dementia, however, we cannot affirm that dementia is the cause of it. Consumption of daily drugs and psychiatric diseases are factors that influence the sleep quality in subjects aged ≥65 years.

[Care complexity and place of death in palliative home care]. / Complejidad asistencial y lugar de muerte en atención domiciliaria paliativa.

OBJECTIVE: To examine the associations between the dimensions of the HexCom care complexity model and the place of death. METHOD: Multicenter longitudinal observational study in patients with advanced illness cared for by home care support teams in Catalonia. Age, gender, type of illness, main caregiver, external support, place of death and the sub-areas of care complexity provided by HexCom were registered. A multivariate Cox regression analysis was performed. RESULTS: Participation of 1527 patients (72% oncology), cared for a median of 35 days. 45% died at home. The probability of dying at home was greater when a greater functional impairment was detected in the initial assessment (hazard ratio [HR]: 7.67; 95% confidence interval [95%CI]: 4.93-11.92), when the patient was male (HR: 1.19; 95%CI: 1.02-1.39), was over 80 years old (HR: 1.41; 95%CI: 1.20-1.66) and when care complexity was detected in relation to being in a situation of last days (HR: 2.24; 95%CI: 1.69-2.97). It was more likely not to die at home in the case of cancer (HR: 0.76; 95%CI: 0.64-0.89), or if poor external support to the family group was detected in the first evaluation (HR: 0.79; 95%CI: 0.67-0.93), or that the patient did not feel at peace with others (HR: 0.56; 95%CI: 0.40-0.79), or lack of agreement on the planning of the place of death (HR: 0.57; 95%CI: 0.48-0.68). CONCLUSIONS: The assessment of the complexity of care through the HexCom-Clin model can help to improve advance planning of decisions by incorporating among its dimensions the feeling of peace with others, the external support to the family nucleus and the degree of agreement on the place of death.

Complejidad asistencial y lugar de muerte en atención domiciliaria paliativa / Care complexity and place of death in palliative home care

Objetivo: Examinar las asociaciones entre las dimensiones del modelo de complejidad asistencial HexCom y la ubicación de la muerte. Método: Estudio observacional longitudinal multicéntrico en pacientes con enfermedad avanzada tratados por los equipos de soporte a la atención domiciliaria en Cataluña. Se recogieron edad, sexo, estado funcional y cognitivo, tipo de enfermedad, cuidador/a principal, trabajador/a familiar, lugar de la muerte y complejidad tras la primera visita. Se realizó un análisis de regresión de Cox multivariante. Resultados: Participación de 1527 pacientes (72% oncológicos), atendidos una mediana de 35 días. El 45% fallecieron en su domicilio. La probabilidad de morir en casa era mayor cuando se detectaba un mayor deterioro funcional (hazard ratio [HR]: 7,67; intervalo de confianza del 95% [IC95%]: 4,93-11,92), cuando el sujeto era varón (HR: 1,19; IC95%: 1,02-1,39), cuando la edad era >80 años (HR: 1,41; IC95%: 1,20-1,66) y cuando se detectaba complejidad en relación a la situación de últimos días (HR: 2,24; IC95%: 1,69-2,97). Era más probable no morir en casa si se padecía cáncer (HR: 0,76; IC95%: 0,64-0,89), si se detectaba un pobre apoyo externo al grupo familiar (HR: 0,79; IC95%: 0,67-0,93), si el/la paciente no se sentía en paz con los demás (HR: 0,54; IC95%: 0,39-0,75) o si había falta de acuerdo en la planificación del lugar de la muerte (HR: 0,57; IC95%: 0,48-0,68). Conclusiones: La valoración de la complejidad asistencial a través del modelo HexCom-Clin puede contribuir a una mejor planificación anticipada de decisiones al incorporar entre sus dimensiones el sentirse en paz con los demás, el soporte externo al núcleo familiar y el grado de acuerdo sobre el lugar de muerte. (AU)

Objective: To examine the associations between the dimensions of the HexCom care complexity model and the place of death. Method: Multicenter longitudinal observational study in patients with advanced illness cared for by home care support teams in Catalonia. Age, gender, type of illness, main caregiver, external support, place of death and the sub-areas of care complexity provided by HexCom were registered. A multivariate Cox regression analysis was performed. Results: Participation of 1527 patients (72% oncology), cared for a median of 35 days. 45% died at home. The probability of dying at home was greater when a greater functional impairment was detected in the initial assessment (hazard ratio [HR]: 7.67; 95% confidence interval [95%CI]: 4.93-11.92), when the patient was male (HR: 1.19; 95%CI: 1.02-1.39), was over 80 years old (HR: 1.41; 95%CI: 1.20-1.66) and when care complexity was detected in relation to being in a situation of last days (HR: 2.24; 95%CI: 1.69-2.97). It was more likely not to die at home in the case of cancer (HR: 0.76; 95%CI: 0.64-0.89), or if poor external support to the family group was detected in the first evaluation (HR: 0.79; 95%CI: 0.67-0.93), or that the patient did not feel at peace with others (HR: 0.56; 95%CI: 0.40-0.79), or lack of agreement on the planning of the place of death (HR: 0.57; 95%CI: 0.48-0.68). Conclusions: The assessment of the complexity of care through the HexCom-Clin model can help to improve advance planning of decisions by incorporating among its dimensions the feeling of peace with others, the external support to the family nucleus and the degree of agreement on the place of death. (AU)

Feasible Intervention through Simple Exercise for Risk of Falls in Dementia Patients: A Pilot Study.

Physical exercise can help older people maintain capacities such as muscle strength, balance, postural control, bone mass, and functionality in ADL that usually decline with age. Dementia patients can attend day care centers where they participate in activities such as cognitive training, music and art therapy, and physical exercise sessions. This research aimed to determine the effectiveness of simple lower limb strength and single leg stance training, feasible in the facilities of day care centers, to reduce the risk of falls in the elderly with dementia. Twenty patients with dementia were divided into intervention and control groups. They participated in mobility, strength, coordination, and balance exercise sessions for 45-50 min on weekdays for 5 weeks. In addition, the intervention group patients performed simple lower limb strength (sit-to-stands) and single leg stance exercises in every session. Risk of falls was assessed with the Tinetti test and the SPPB. Comparisons of post- and pre-intervention scores for the Tinetti test and SPPB were statistically increased (0.8 ± 0.7, p = 0.03; 1.5 ± 1.3 points, p = 0.02) in intervention patients. Simple lower limb strength and single leg stance exercises feasible to be done in day care facilities are effective tools for reducing the risk of falls in the elderly with dementia.

Gender and Observed Complexity in Palliative Home Care: A Prospective Multicentre Study Using the HexCom Model.

This study analyses gender differences in the complexity observed in palliative home care through a multicentre longitudinal observational study of patients with advanced disease treated by palliative home care teams in Catalonia (Spain). We used the HexCom model, which includes six dimensions and measures three levels of complexity: high (non-modifiable situation), medium (difficult) and low. Results: N = 1677 people, 44% women. In contrast with men, in women, cancer was less prevalent (64.4% vs. 73.9%) (p < 0.001), cognitive impairment was more prevalent (34.1% vs. 26.6%; p = 0.001) and professional caregivers were much more common (40.3% vs. 24.3%; p < 0.001). Women over 80 showed less complexity in the following subareas: symptom management (41.7% vs. 51,1%; p = 0.011), emotional distress (24.5% vs. 32.8%; p = 0.015), spiritual distress (16.4% vs. 26.4%; p = 0.001), socio-familial distress (62.7% vs. 70.1%; p = 0.036) and location of death (36.0% vs. 49.6%; p < 0.000). Men were more complex in the subareas of "practice" OR = 1.544 (1.25-1.90 p = 0.000) and "transcendence" OR = 1.52 (1.16-1.98 p = 0.002). Observed complexity is related to male gender in people over 80 years of age. Women over the age of 80 are remarkably different from their male counterparts, showing less complexity regarding care for their physical, psycho-emotional, spiritual and socio-familial needs.

[Wish to hasten death in home palliative care. Look for your seven percent.] / El deseo de adelantar la muerte en cuidados paliativos domiciliarios. Busca tu siete por ciento.

OBJECTIVE: The wish to hasten death has been little researched in the area of Mediterranean countries and we are not aware of specific studies on its particularities in home care in our setting. The aim of this work was to investigate the prevalence and evolution of wish to hasten death in home care, analysing its relationship with physical, emotional, spiritual, ethical and social-family unrest. METHODS: Longitudinal observational study in palliative home care in Catalonia. 43 teams agreed on the level of complexity after the first visit and after the discharge of the patient with the HexCom model, which classifies the desire to anticipate death into Low complexity (no or sporadic manifestation); Medium (persistent desire that requires specific treatment); or High (persistent desire that is considered potentially refractory). For the comparison of proportions, Pearson's Chi-squared test was used and a multivariate logistic regression analysis was performed, in which the dependent variable corresponded to the desire to hasten initial death. The level of significance was p≤0.05. RESULTS: The total number of patients included in this study was 1,677, of whom 1,169 (69.7%) were oncologic. The prevalence of desire to hasten death was 6.67%. It was related to spiritual distress, especially lack of meaning (OR 3.25) and lack of connection (OR 3.81), to psychoemotional distress (OR 2.34) and to ethical distress. Protective factors were spiritual distress in relation to transcendence (OR 0.50), the caregiver being a partner (OR 0.50) and being cared for by a team that included psychology and social work (OR 0.34). The desire to anticipate death is stable in 71.6% of patients. CONCLUSIONS: The desire to anticipate death is a changing and complex phenomenon that can emerge at any time. The presence of psycho-emotional, spiritual-existential and ethical discomfort, especially in patients without a partner, should make us take a proactive attitude to identify it early.

OBJETIVO: El deseo de adelantar la muerte ha sido poco investigado en el área de los países mediterráneos y no conocemos estudios específicos sobre sus particularidades en atención domiciliaria en nuestro entorno. El objetivo de este trabajo fue investigar la prevalencia y la evolución del deseo de anticipar la muerte en atención domiciliaria, analizando su relación con el malestar físico, emocional, espiritual, ético y sociofamiliar. METODOS: Estudio observacional longitudinal en el ámbito de la atención domiciliaria paliativa en Catalunya. 43 equipos acordaron el nivel de complejidad tras la primera visita y tras el alta del paciente con el modelo HexCom, el cual clasifica el deseo de anticipar la muerte en complejidad Baja (manifestación nula o esporádica); Media (Deseo persistente que requiere tratamiento específico); o Alta (Deseo persistente que se considera potencialmente refractario). Para la comparación de proporciones se utilizó la prueba de Ji cuadrado de Pearson y se realizó un análisis de regresión logística multivariante, en el que la variable dependiente correspondía con el deseo de adelantar la muerte inicial. El nivel de significación fue p≤0,05. RESULTADOS: El número total de pacientes incluidos en este estudio fue de 1.677, de los cuales 1.169 (69,7%) eran oncológicos. La prevalencia de deseo de anticipar la muerte fue del 6,67%. Se relacionó con el malestar espiritual, ante todo con la falta de sentido (OR 3,25) y de conexión (OR 3,81), con el malestar psicoemocional (OR 2,34) y con el malestar ético. Fueron factores protectores el malestar espiritual en relación con la transcendencia (OR 0,50), que el cuidador fuese la pareja (OR 0,50) y ser atendido por un equipo en el que se incluyese psicología y trabajo social (OR 0,34). El deseo de anticipar la muerte fue estable en el 71,6% de los pacientes. CONCLUSIONES: El deseo de anticipar la muerte es un fenómeno cambiante y complejo que puede emerger en cualquier momento. La presencia de malestar psicoemocional, espiritual-existencial y ético, sobre todo en pacientes sin pareja, nos han de hacer tomar una actitud proactiva para identificarlo precozmente.

Preventing Violence by Teachers in Primary Schools: Study Protocol for a Cluster Randomized Controlled Trial in Haiti.

CONTEXT: Although teacher violence at schools is a serious problem in Haiti, there is a lack of systematic evidence on the effectiveness of school-based interventions in reducing teacher violence in this low-income country. OBJECTIVE: To test the effectiveness of the preventative intervention Interaction Competencies with Children for Teachers (ICC-T) aiming to reduce teachers' use of violent disciplinary strategies and to improve their interaction competences with children in the Haitian context. DESIGN SETTING PARTICIPANTS: The study is designed as a two-arm matched cluster randomized controlled trial. The sample consists of 468 teachers and 1,008 children from 36 (community and public) primary schools around Cap-Haïtien (Département du Nord) in Haiti. Data will be collected in three phases, before the intervention, and 6 and 18 months after. INTERVENTION: In the group of intervention schools, ICC-T will be delivered as a 5-day training workshop. Workshop sessions are divided into five modules: 1) improving teacher-student interactions, 2) maltreatment prevention, 3) effective discipline strategies, 4) identifying and supporting burdened students, and 5) implementation in everyday school life. MAIN OUTCOME MEASURE: The main outcome measure is teacher violence assessed in two ways: (i) teachers' self-reported use of violence, and (ii) children's self-reported experiences of violence by teachers. CONCLUSIONS: Prior evaluations of ICC-T had been conducted in sub-Saharan Africa with promising results. This study will test for the first time the effectiveness of this intervention outside the context of sub-Saharan Africa.

Evaluation of the Environmental Benefits Associated with the Addition of Olive Pomace in the Manufacture of Lightweight Aggregates.

A Life Cycle Assessment (LCA) using SimaPro software has been carried out concerning the manufacture of artificial lightweight aggregates (LWAs). The study aims to evaluate the changes in the environmental impact when an additive of residual origin, specifically olive pomace (OP), is added following the principles of the Circular Economy. This residue (commonly known as alperujo) was used as a substitute for clay in 1.25, 2.5 and 5 wt%. The environmental impact related to the use of olive pomace in the mixture was estimated using the CML 2000 methodology, yielding improvements of 3.8%, 7.7% and 15.3% for 1.25, 2.5 and 5 wt% OP added, respectively. Optimum addition results are in the range of 1.25 and 2.5 wt% OP. In this way, the reduction of emissions associated with LWA manufacture would be favored without negatively affecting the technological properties of the resulting material.

Describing Complexity in Palliative Home Care Through HexCom: A Cross-Sectional, Multicenter Study.

BACKGROUND: Complexity has become a core issue in caring for patients with advanced disease and/or at the end-of-life. The Hexagon of Complexity (HexCom) is a complexity assessment model in the process of validation in health-care settings. Our objective is to use the instrument to describe differences in complexity across disease groups in specific home care for advanced disease and/or at the end-of-life patients, both in general and as relates to each domain and subdomain. METHODS: Cross-sectional study of home care was conducted in Catalonia. The instrument includes 6 domains of needs (clinical, psychological/emotional, social/family, spiritual, ethical, and death-related), 4 domains of resources (intrapersonal, interpersonal, transpersonal, and practical), and 3 levels of complexity (High (H), Moderate (M), and Low (L)). Interdisciplinary home care teams assessed and agreed on the level of complexity for each patient. RESULTS: Forty-three teams participated (74.1% of those invited). A total of 832 patients were assessed, 61.4% of which were cancer patients. Moderate complexity was observed in 385 (47.0%) cases and high complexity in 347 (42.4%). The median complexity score was 51 for cancer patients and 23 for patients with dementia (p<0.001). We observed the highest level of complexity in the social/family domain. Patients/families most frequently used interpersonal resources (80.5%). CONCLUSIONS: This study sheds light on the high-intensity work of support teams, the importance of the social/family domain and planning the place of death, substantial differences in needs and resources across disease groups, and the importance of relationship wellbeing at the end-of-life.

International remittances, cash transfer assistance and voter turnout in Mexico.

Most research on the political consequences of international migration conceptualizes financial remittances as being a substitute for state-provided assistance. This paper tests the actual validity of this assumption. Using data from the 2012-2016 Americas Barometer, the analysis confirms previous findings on the negative impact of financial remittances on electoral turnout intentions. However it reveals that this effect does not vary according to an individual's beneficiary status of Conditional Cash Transfer (CCT) assistance. This finding is corroborated using data aggregated at the municipal level within Mexico. Accordingly, voter turnout rates in a given municipality for the 2012 presidential election are negatively associated with the percentage of households receiving remittances in that municipality. However, this association does not vary with the spending on CCT assistance within a given municipality. The evidence thus suggests that financial remittances undermine electoral participation through mechanisms other than the substitution of state-sponsored assistance, and as such further research is needed for us to discover what is really going on here.

Structural and functional alterations of the heart in Parkinson's disease.

Parkinson's disease (PD) patients have most frequently heart failure. The cause of this increased prevalence is not known. We designed a study to assess the cardiac function and cardiac structure in patients with PD compared to a control group. METHODS: Cross-sectional study with 50 PD patients and 50 healthy matched controls. We performed electro and echocardiograms to all patients and controls. The measurements were blind. In addition, we performed a neurological assessment. RESULTS: PD patients had higher left ventricular mass index (114.2 ± 38.4 vs. 94.1 ± 26.4 g/m2; P = 0.003) and higher left atrial volume (30.1 ± 7.9 vs. 26.7 ± 6.2 ml/m2; P = 0.01). PD was an independent risk factor for elevated left ventricular filling pressures (OR = 2.7, CI 95% 2.2-6.3; P = 0.004). Concentric remodeling and left ventricular hypertrophy were associated with more advanced Hoehn and Yahr stages. Moreover, patients with more dysautonomia symptoms showed more left ventricular hypertrophy. Finally, PD group had longer QT interval than control group regardless of the drugs. CONCLUSIONS: PD is significantly associated with increased concentric left ventricular hypertrophy and diastolic dysfunction. Advanced stages of PD are associated with a more severe cardiac affection. These findings can explain the increase of heart failure in PD patients. Cardiomyopathy could be a non-motor parkinsonian symptom.

Trombosis de seno cavernoso causada por zigomicosis invasiva fulminante: A propósito de un caso / Cavernous sinus Thrombosis caused by fulminant invasive zygomycosis: A case report

Zygomycosis is an opportunistic fungal infection caused by fungi of the Mucorales order. It’s potentially lethal infection which generally affects diabetic or inmunocomprised patients. Cavernous sinus thrombosis is uncommon complication. We report the case of a 67 year old woman with invasive zycomycosis who present cranial nerves dysfunction (III, IV, VI, V1 and V2 branches of the trigeminal nerve), proptosis and retroorbital pain as initial manifestation. Brain magnetic resonance imaging evidence early indirect signs. Biopsy of the cavernous sinus revealed Rhizopus as the offending agent. A high index of suspicion is needed to correctly diagnose this condition for its optimal management.

La zigomicosis es una infección oportunista y potencialmente letal producida por hongos del orden Mucorales. Afecta a pacientes diabéticos e inmunocomprometidos. La trombosis del seno cavernoso es una complicación poco frecuente. Presentamos el caso de una paciente mujer de 67 años diagnosticada de zigomicosis invasiva que debutó con compromiso de pares craneales (III, IV, VI además de las ramas V1 y V2 del nervio trigémino), proptosis y dolor retroorbitario derecho. La resonancia magnética craneal, en fase aguda, mostró signos indirectos característicos. La biopsia de seno cavernoso confirmó la presencia de Rhizopus. Se precisa un alto índice de sospecha clínica que favorezca una intervención terapéutica precoz y agresiva.

Searching for novel molecular targets of chronic rejection in an orthotopic experimental lung transplantation model.

BACKGROUND: Chronic rejection (CR) is the main reason for the limited survival rates among lung transplant (LT) recipients. There remains no effective treatment for CR. The aim of this study was to identify new molecular mechanisms involved in CR by using DNA microarray analysis. METHODS: We performed 10 left LTs using the microsurgical cuff technique in inbred Sprague-Dawley rats. Lung isograft samples were obtained 3 months after surgery. We analyzed histologic, apoptotic and gene expression changes by DNA microarray and quantitative PCR analysis. RESULTS: Histologic analyses confirmed signs of CR in all lungs and positive labeling for apoptotic and anti-apoptotic markers. A total of 702 genes were regulated in the CR lungs: 317 genes were upregulated and 385 were downregulated. Significant changes for about 30 biologic processes, including regulation of the cytoskeleton, and 15 signaling pathways, such as adherens junctions, were observed. We found significantly increased mRNA expression of the Cldn5, Epas1, Tgfb1, Vegf, Selp1, Hsp27 and Igf1 genes. CONCLUSIONS: This is the first experimental study performed in an orthotopic model of LT using DNA microarray analysis. The individual genes, biologic process and pathways identified may represent novel targets that could be manipulated and contribute to the development of treatments capable of providing protection from CR.

Human papillomavirus genotype distribution in Madrid and correlation with cytological data.

BACKGROUND: Cervical cancer is the second most common cancer in women worldwide. Infection with certain human papillomavirus (HPV) genotypes is the most important risk factor associated with cervical cancer. This study analysed the distribution of type-specific HPV infection among women with normal and abnormal cytology, to assess the potential benefit of prophylaxis with anti-HPV vaccines. METHODS: Cervical samples of 2,461 women (median age 34 years; range 15-75) from the centre of Spain were tested for HPV DNA. These included 1,656 samples with normal cytology (NC), 336 with atypical squamous cells of undetermined significance (ASCUS), 387 low-grade squamous intraepithelial lesions (LSILs), and 82 high-grade squamous intraepithelial lesions (HSILs). HPV detection and genotyping were performed by PCR using 5'-biotinylated MY09/11 consensus primers, and reverse dot blot hybridisation. RESULTS: HPV infection was detected in 1,062 women (43.2%). Out of these, 334 (31%) samples had normal cytology and 728 (69%) showed some cytological abnormality: 284 (27%) ASCUS, 365 (34%) LSILs, and 79 (8%) HSILs. The most common genotype found was HPV 16 (28%) with the following distribution: 21% in NC samples, 31% in ASCUS, 26% in LSILs, and 51% in HSILs. HPV 53 was the second most frequent (16%): 16% in NC, 16% in ASCUS, 19% in LSILs, and 5% in HSILs. The third genotype was HPV 31 (12%): 10% in NC, 11% in ASCUS, 14% in LSILs, and 11% in HSILs. Co-infections were found in 366 samples (34%). In 25%, 36%, 45% and 20% of samples with NC, ASCUS, LSIL and HSIL, respectively, more than one genotype was found. CONCLUSIONS: HPV 16 was the most frequent genotype in our area, followed by HPV 53 and 31, with a low prevalence of HPV 18 even in HSILs. The frequency of genotypes 16, 52 and 58 increased significantly from ASCUS to HSILs. Although a vaccine against HPV 16 and 18 could theoretically prevent approximately 50% of HSILs, genotypes not covered by the vaccine are frequent in our population. Knowledge of the epidemiological distribution is necessary to predict the effect of vaccines on incidence of infection and evaluate cross-protection from current vaccines against infection with other types.

Modificaciones técnicas del modelo de trasplante pulmonar ortotópico en ratas con donantes en muerte cerebral / Technical Modifications of the Orthotopic Lung Transplantation Model in Rats with Brain-Dead Donors

Introducción: El trasplante microquirúrgico de pulmón en ratas ha permitido adquirir nuevos conocimientos sobre el trasplante de pulmón. Sin embargo, algunos aspectos de la técnica de trasplante en humanos aún no han sido incluidos en este modelo, lo que podría interferir en la interpretación clínica y en la extrapolación de los resultados. Método: Se han realizado 20 trasplantes pulmonares izquierdos con la técnica de manguitos (cuff) incorporando algunas modificaciones técnicas como la inducción de la muerte cerebral, el control del tiempo de isquemia, la perfusión retrógrada en el donante y la reperfusión secuencial controlada del pulmón implantado en el receptor. Resultados: La supervivencia ha sido del 80%. Los pulmones trasplantados mostraron una adecuada perfusión y ventilación con buena permeabilidad de las anastomosis. Se han observado signos de isquemia-reperfusión en todos los animales, y de rechazo agudo leve en la mitad de ellos. Conclusiones: El modelo que presentamos es válido y similar al procedimiento que se realiza en humanos, lo que reduciría el número de posibles variables derivadas de la técnica quirúrgica a la hora de extrapolar los resultados a la clínica(AU)

Background: Microsurgical lung transplantation in rats has allowed us to obtain new knowledge about lung transplantation. However, some aspects in human transplantation technique still have not been included in this model, which could interfere with the clinical interpretation and extrapolation of results .Methods: Twenty left lung transplantations were performed with a cuff technique and technical modifications, such as brain death induction, the control of ischemia time and retrograde perfusion in the donor and the controlled sequential reperfusion of the implanted lung in the recipient. Results: Survival rate was 80%. The transplanted lungs showed proper perfusion and ventilation with good permeability of the anastomoses. Signs of ischemia-reperfusion injury were observed in all animals while mild acute rejection was seen in half of them. Conclusions: The model shown proves valid and is very similar to the procedure carried out in humans, which would reduce the number of possible variables derived from the surgical technique when extrapolating the study results to clinical use(AU)

Technical modifications of the orthotopic lung transplantation model in rats with brain-dead donors.

BACKGROUND: Microsurgical lung transplantation in rats has allowed us to obtain new knowledge about lung transplantation. However, some aspects in human transplantation technique still have not been included in this model, which could interfere with the clinical interpretation and extrapolation of results. METHODS: Twenty left lung transplantations were performed with a cuff technique and technical modifications, such as brain death induction, the control of ischemia time and retrograde perfusion in the donor and the controlled sequential reperfusion of the implanted lung in the recipient. RESULTS: Survival rate was 80%. The transplanted lungs showed proper perfusion and ventilation with good permeability of the anastomoses. Signs of ischemia-reperfusion injury were observed in all animals while mild acute rejection was seen in half of them. CONCLUSIONS: The model shown proves valid and is very similar to the procedure carried out in humans, which would reduce the number of possible variables derived from the surgical technique when extrapolating the study results to clinical use.

Valoración de la lesión de isquemia-reperfusión y del rechazo agudo precoz en el trasplante pulmonar experimental con tiempo de isquemia prolongado / Assessment of ischemia reperfusion injury and early acute rejection in experimental lung transplantation after prolonged ischemia

Objetivo: Valorar la lesión de isquemia-reperfusión y el rechazo agudo precoz del pulmón sometido a un tiempo de isquemia de 10 h. Material y métodos: Se han utilizado 30 ratas Sprague-Dawley, en 15 de las cuales se realizó un trasplante pulmonar izquierdo con tiempos de isquemia de 4 h (n = 5), 6 h (n = 5) y 10 h (n = 5). Del donante se extrajo el bloque cardiopulmonar, se disecó el pulmón izquierdo y se efectuó el implante con la técnica de manguitos (cuffs). A las 48 h se extrajo el bloque cardiopulmonar. Se valoraron la evolución postoperatoria, la lesión de isquemia-reperfusión y el rechazo agudo del X2 pulmón trasplantado y del contralateral. El análisis estadístico se realizó con el test de la X2 y el test exacto de Fisher para el cálculo de probabilidades. Resultados: Los animales trasplantados con un tiempo de isquemia de 10 h no tuvieron peor evolución clínica (p = 0,711). No se observaron diferencias significativas entre los parámetros histológicos de lesión de isquemia-reperfusión y de rechazo agudo con los distintos tiempos de isquemia, ni en la evolución clínica por la presencia y gravedad de éstos. Tampoco se observó que el rechazo agudo se relacionara con la lesión de isquemia-reperfusión (p > 0,05). Conclusiones: En nuestro estudio, el tiempo de isquemia pulmonar prolongado de 10 h no se asocia ni a lesiones de isquemia-reperfusión y rechazo agudo más graves ni a una peor evolución clínica. El rechazo agudo no se relaciona con la presencia ni con la gravedad de la lesión de isquemia-reperfusión

Objective: To assess ischemia­reperfusion injury and early acute rejection of the lung subjected to ischemia for 10 hours. Material and methods: Fifteen of 30 Sprague­Dawley rats underwent transplantation of a left lung that had been subjected to ischemic times of 4 (n=5), 6 (n=5), or 10 hours (n=5). The cardiopulmonary block was removed from the donor, the left lung was dissected, and the transplant was carried out using the cuff technique. The cardiopulmonary block was extracted after 48 hours. We assessed postoperative progress, ischemia­reperfusion injury and acute rejection of the transplanted and contralateral lungs. Statistical probabilities were analyzed using the X2 and Fisher exact tests. Results: Clinical course was not worse after an ischemic time of 10 hours (P=.711). No significant differences were observed in histological markers of ischemia­reperfusion injury and acute rejection or in clinical course in relation to the different ischemic times; nor was clinical course related to the presence or severity of lesions or rejection. Similarly, acute rejection was unrelated to ischemia­reperfusion injury (P>.05). Conclusions: In this study, a prolonged ischemic time of 10 hours was not associated with ischemia­reperfusion injuries, with more severe acute rejection, or with a worse clinical course. Acute rejection was also unrelated to the presence or severity of ischemia­reperfusion injury