Adsorption and Photodegradation of Lanasol Yellow 4G in Aqueous Solution by Natural Zeolite Treated by CO2-Laser Radiation.

Natural zeolite is a widely used material with excellent environmental cleaning performance, especially in water and wastewater treatment. Natural zeolite (Zini) calcined by CO2-laser radiation (ZL) was tested as a catalyst for the photodegradation and the adsorption of industrial azo dye Lanasol Yellow 4G (LY4G) in water. Morphology, chemical structure, and surface composition of Zini and ZL were analyzed by XRD, SEM, EDS, and XPS. UV/Visible spectrophotometry was used to evaluate the photocatalytic activity of Zini and ZL. The photocatalytic activity of the studied zeolites was associated with the presence of Fe oxides in their composition. Laser-treated natural zeolite showed higher efficiency as a photocatalyst compared to untreated natural zeolite.

The First Latin American Consensus on Superficial and Perforating Venous Mapping.

With the aim of obtaining a map which is useful as a diagnostic tool and therapeutical orientation, complementing the written report of duplex ultrasound venous study, Latin-American Scientific Societies of Phlebology, Vascular Surgery and Vascular Imaging were invited to participate, through their regional representatives, to the First Consensus of Superficial and Perforating Venous Mapping. A consensus process using a modified Delphi method was carried out. An International Working Group was formed, which developed a Prototype of the Venous Mapping that worked as a starting point for consensus, and was presented in a first virtual meeting of 54 experts (societies' representatives) when the methodology was explained. For the consensus process, two rounds of self-administrated questionnaires with feedback were used. In the first questionnaire a 100% consensus was obtained in the 15 statements (an agreement range of 85.2% to 100%) In the analysis of qualitative data, three categories according to the actions to implement were identified - actions which involved no action, minor changes and major changes. This analysis was used to build the second questionnaire, which reached a consensus in its six statements (agreement range of 87.1% to 98.1%). A final consensus on every field proposed was established with the approval of all the experts consulted and it was presented at a third online meeting. The document of the superficial and perforating venous mapping reached by consensus is presented hereafter.

IgA Nephropathy in Elderly Patients.

BACKGROUND AND OBJECTIVES: Some studies suggest that the incidence of IgA nephropathy is increasing in older adults, but there is a lack of information about the epidemiology and behavior of the disease in that age group. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: In this retrospective multicentric study, we analyzed the incidence, forms of presentation, clinical and histologic characteristics, treatments received, and outcomes in a cohort of 151 patients ≥65 years old with biopsy-proven IgA nephropathy diagnosed between 1990 and 2015. The main outcome was a composite end point of kidney replacement therapy or death before kidney replacement therapy. RESULTS: We found a significant increase in the diagnosis of IgA nephropathy over time from six patients in 1990-1995 to 62 in 2011-2015 (P value for trend =0.03). After asymptomatic urinary abnormalities (84 patients; 55%), AKI was the most common form of presentation (61 patients; 40%). Within the latter, 53 (86%) patients presented with hematuria-related AKI (gross hematuria and tubular necrosis associated with erythrocyte casts as the most important lesions in kidney biopsy), and eight patients presented with crescentic IgA nephropathy. Six (4%) patients presented with nephrotic syndrome. Among hematuria-related AKI, 18 (34%) patients were receiving oral anticoagulants, and this proportion rose to 42% among the 34 patients older than 72 years old who presented with hematuria-related AKI. For the whole cohort, survival rates without the composite end point were 74%, 48%, and 26% at 1, 2, and 5 years, respectively. Age, serum creatinine at presentation, and the degree of interstitial fibrosis in kidney biopsy were risk factors significantly associated with the outcome, whereas treatment with renin-angiotensin-aldosterone blockers was associated with a lower risk. Immunosuppressive treatments were not significantly associated with the outcome. CONCLUSIONS: The diagnosis of IgA nephropathy among older adults in Spain has progressively increased in recent years, and anticoagulant therapy may be partially responsible for this trend. Prognosis was poor. PODCAST: This article contains a podcast at https://www.asn-online.org/media/podcast/CJASN/2019_07_16_CJASNPodcast_19_08_.mp3.

Abdomen agudo por picadura de viuda negra. Evaluación clínica, diagnóstica y terapéutica: análisis descriptivo - retrospectivo. Presentación de un caso interpretado como abdomen agudo quirúrgico / Acute abdomen by black widow spider bite. Clinical, diagnostic and therapeutic evaluation: descriptive - retrospective analysis. Presentation of a case interpreted as acute surgical abdomen

Antecedentes: el abdomen agudo médico por picadura de Latrodectus Mactans es una patología poco frecuente, con una típica presentación clínica. Se presenta como un cuadro neurotóxico (hiperestesia, fasciculaciones, contracturas musculares generalizadas, excitabilidad, hiperreflexia); y en casos graves síntomas muscarínicos: miosis, bradicardia, HTA. Por las contracturas abdominales puede ser interpretado como abdomen agudo quirúrgico. Objetivo: evaluación clínica, diagnóstica y terapéutica de abdomen agudo por picadura de Latrodectus Mactans de un caso interpretado como abdomen agudo quirúrgico. Diseño: estudio observacional descriptivo restrospectivo. Población: un paciente de sexo masculino de 31 años de edad. Método: análisis de historia clínica de un paciente que consulta por dolor abdominal de tipo cólico, posterior a una transgresión alimentaria e ingesta abundante de alcohol. Examen físico: dolor a la palpación sin defensa ni peritonismo. Se interpreta como cólico intestinal medicándose con espasmódicos. Pasadas 2 horas presenta vómitos y vientre en tabla; por lo cual se deriva a este hospital, con diagnóstico de abdomen agudo perforativo. Laboratorio: leucocitosis con desviación a la izquierda. Se interpreta abdomen agudo quirúrgico y se laparotomiza. Resultado: laparotomía: distensión de colon e intestino delgado sin causa orgánica. Postoperatorio presenta HTA, bradicardia, diaforesis, edema facial, y contractura muscular generalizada. Reinterrogatorio: refiere sensación quemante en región epigástrica previo al inicio del cuadro (¿picadura?). Se sospecha Lactrodesis iniciándose tratamiento médico, con remisión absoluta de la sintomatología en 12 hs. Conclusión: el cuadro de Lactrodesis presenta una clínica típica, que no debe ser mal interpretada. Es importante ser sumamente cauto en la anamnesis (lugar de procedencia), el examen físico (buscar lesiones por picadura) y la clínica; y tener presente en los cuadros de abdomen agudo dicha patología

Abdomen agudo por picadura de viuda negra. Evaluación clínica, diagnóstica y terapéutica: análisis descriptivo - retrospectivo. Presentación de un caso interpretado como abdomen agudo quirúrgico / Acute abdomen by black widow spider bite. Clinical, diagnostic and therapeutic evaluation: descriptive - retrospective analysis. Presentation of a case interpreted as acute surgical abdomen

Antecedentes: el abdomen agudo médico por picadura de Latrodectus Mactans es una patología poco frecuente, con una típica presentación clínica. Se presenta como un cuadro neurotóxico (hiperestesia, fasciculaciones, contracturas musculares generalizadas, excitabilidad, hiperreflexia); y en casos graves síntomas muscarínicos: miosis, bradicardia, HTA. Por las contracturas abdominales puede ser interpretado como abdomen agudo quirúrgico. Objetivo: evaluación clínica, diagnóstica y terapéutica de abdomen agudo por picadura de Latrodectus Mactans de un caso interpretado como abdomen agudo quirúrgico. Diseño: estudio observacional descriptivo restrospectivo. Población: un paciente de sexo masculino de 31 años de edad. Método: análisis de historia clínica de un paciente que consulta por dolor abdominal de tipo cólico, posterior a una transgresión alimentaria e ingesta abundante de alcohol. Examen físico: dolor a la palpación sin defensa ni peritonismo. Se interpreta como cólico intestinal medicándose con espasmódicos. Pasadas 2 horas presenta vómitos y vientre en tabla; por lo cual se deriva a este hospital, con diagnóstico de abdomen agudo perforativo. Laboratorio: leucocitosis con desviación a la izquierda. Se interpreta abdomen agudo quirúrgico y se laparotomiza. Resultado: laparotomía: distensión de colon e intestino delgado sin causa orgánica. Postoperatorio presenta HTA, bradicardia, diaforesis, edema facial, y contractura muscular generalizada. Reinterrogatorio: refiere sensación quemante en región epigástrica previo al inicio del cuadro (¿picadura?). Se sospecha Lactrodesis iniciándose tratamiento médico, con remisión absoluta de la sintomatología en 12 hs. Conclusión: el cuadro de Lactrodesis presenta una clínica típica, que no debe ser mal interpretada. Es importante ser sumamente cauto en la anamnesis (lugar de procedencia), el examen físico (buscar lesiones por picadura) y la clínica; y tener presente en los cuadros de abdomen agudo dicha patología