Immunotherapy and stereotactic body radiotherapy for older patients with non-metastatic renal cancer unfit for surgery or decline nephrectomy: practical proposal by the International Geriatric Radiotherapy Group.

The standard of care for non-metastatic renal cancer is surgical resection followed by adjuvant therapy for those at high risk for recurrences. However, for older patients, surgery may not be an option due to the high risk of complications which may result in death. In the past renal cancer was considered to be radio-resistant, and required a higher dose of radiation leading to excessive complications secondary to damage of the normal organs surrounding the cancer. Advances in radiotherapy technique such as stereotactic body radiotherapy (SBRT) has led to the delivery of a tumoricidal dose of radiation with minimal damage to the normal tissue. Excellent local control and survival have been reported for selective patients with small tumors following SBRT. However, for patients with poor prognostic factors such as large tumor size and aggressive histology, there was a higher rate of loco-regional recurrences and distant metastases. Those tumors frequently carry program death ligand 1 (PD-L1) which makes them an ideal target for immunotherapy with check point inhibitors (CPI). Given the synergy between radiotherapy and immunotherapy, we propose an algorithm combining CPI and SBRT for older patients with non-metastatic renal cancer who are not candidates for surgical resection or decline nephrectomy.

Efecto de los fármacos en la prolongación del QT y la aparición de muerte súbita en la COVID-19 / Effect of Drugs on QT Prolongation and Sudden Death in COVID-19

Introducción: Las evidencias científicas han demostrado que durante el período pandémico por la COVID-19 ha existido un incremento de la incidencia de muerte súbita cardiovascular, proporcional al incremento de los casos y a la letalidad por la enfermedad. Objetivos: Compilar información sobre los fármacos empleados en el tratamiento de la COVID-19 y sus posibles efectos en la prolongación del intervalo QT y la aparición de muerte súbita. Métodos: Se realizó una búsqueda de información a partir de las bases de datos PubMed, Medline y SciELO, en los idiomas español e inglés en el período de enero de 2020 a enero de 2023. Resultados: Los hallazgos más recientes sugieren que los factores relacionados con el tratamiento médico del paciente para sus enfermedades cardiovasculares previas, el empleo concomitante de drogas para otras comorbilidades, el ensayo de nuevas drogas que se investigan en la actualidad para el tratamiento de la enfermedad y el uso inadecuado de fármacos en complicaciones graves por la COVID-19, pueden ocasionar prolongación del intervalo QT y arritmias ventriculares tipo torsades de pointes, lo que puede conllevar a la aparición de muerte súbita. Conclusiones: Ha sido demostrado el efecto deletéreo de los fármacos en el tratamiento de la COVID-19 y sus posibles asociaciones a la terapéutica del paciente, en la prolongación del tiempo de repolarización ventricular cardíaca, cuya traducción eléctrica es un intervalo QT prolongado y su contribución a la génesis de arritmias malignas potencialmente fatales capaces de desencadenar un paro cardíaco y evolucionar a la muerte súbita(AU)

Scientific evidence has shown an increase in the incidence of sudden cardiovascular death during the COVID-19 pandemic period. This has been proportional to the increase in cases and mortality from the disease. Direct and indirect injury to the myocardium and vascular system allow to partially explain the statistics. Among the factors related to the medical treatment of the patient for previous cardiovascular diseases, it is the concomitant use of drugs for other comorbidities. The trial of new drugs for the treatment of this condition and the inappropriate use of drugs in serious complications from COVID-19 are currently being investigated. These can cause QT prolongation and torsades de pointes ventricular arrhythmias, which can lead to sudden death. Monitoring the QT interval is recommended, before and during treatment, in patients who come to the emergency room with a clinical condition suggestive of COVID-19. Additionally, modifiable factors favoring its prolongation should be evaluated. Decision-making in the application of therapeutic protocols in patients with COVID-19 with prolonged QTc at baseline, or with increased QTc after starting treatment, must go through the analysis of the risk/benefit ratio defined by a multi- and interdisciplinary team(AU)

Humoral response after a BNT162b2 heterologous third dose of COVID-19 vaccine following two doses of BBIBP-CorV among healthcare personnel in Peru.

Background: The inactivated virus vaccine, BBIBP-CorV, was principally distributed across low- and middle-income countries as primary vaccination strategy to prevent poor COVID-19 outcomes. Limited information is available regarding its effect on heterologous boosting. We aim to evaluate the immunogenicity and reactogenicity of a third booster dose of BNT162b2 following a double BBIBP-CorV regime. Methods: We conducted a cross-sectional study among healthcare providers from several healthcare facilities of the Seguro Social de Salud del Perú - ESSALUD. We included participants two-dose BBIBP-CorV vaccinated who presented a three-dose vaccination card at least 21 days passed since the vaccinees received their third dose and were willing to provide written informed consent. Antibodies were determined using LIAISON® SARS-CoV-2 TrimericS IgG (DiaSorin Inc., Stillwater, USA). Factors potentially associated with immunogenicity, and adverse events, were considered. We used a multivariable fractional polynomial modeling approach to estimate the association between anti-SARS-CoV-2 IgG antibodies' geometric mean (GM) ratios and related predictors. Results: We included 595 subjects receiving a third dose with a median (IQR) age of 46 [37], [54], from which 40% reported previous SARS-CoV-2 infection. The overall geometric mean (IQR) of anti-SARS-CoV-2 IgG antibodies was 8,410 (5,115 - 13,000) BAU/mL. Prior SARS-CoV-2 history and full/part-time in-person working modality were significantly associated with greater GM. Conversely, time from boosting to IgG measure was associated with lower GM levels. We found 81% of reactogenicity in the study population; younger age and being a nurse were associated with a lower incidence of adverse events. Conclusions: Among healthcare providers, a booster dose of BNT162b2 following a full BBIBP-CorV regime provided high humoral immune protection. Thus, SARS-CoV-2 previous exposure and working in person displayed as determinants that increase anti-SARS-CoV-2 IgG antibodies.

Prevalencia de glucosa alterada en ayuno y dislipidemia entre pacientes mexicanos con VIH naïve a tratamiento antirretroviral.

BACKGROUND: Metabolic complications have become more relevant in the care of patients with HIV. However, little is known about the incidence and risk factors for these disorders among HIV-infected antiretroviral treatment naïve (ARTn) patients. OBJECTIVE: To recognize the prevalence of Impaired Fasting Glucose (IFG) and dyslipidemia among HIV-infected ARTn Mexican individuals and identify associated risk factors. METHOD: A retrospective study was conducted in HIV-1-infected ART-N patients, referred for attention to a general hospital in Mexico City, between 2009 and 2019. We collected information for anthropometric, clinical, biochemical and HIV status variables. RESULTS: We included 221 patients, 97% were males, mean age 30 years (interquartile range [IQR]: 25-38); median CD4 count was 250 cells/mm3 (IQR: 120.25-391) and median log10 HIV viral load was 4.69 HIV-1 RNA copies/ml (IQR: 3.64-5.25). Prevalence of IFG was 22.6% and was associated with overweight-obesity (odds ratio [OR]: 2.75; 95% confidence interval [95% CI]: 1.36-5.55; p-value < 0.05). Hypoalphalipoproteinemia was the most frequent dyslipidemia: 69.46%. An association between count CD4 < 250 and lower HDL cholesterol levels was found (OR: 3.23; 95CI%: 1.61-6.5; p-value < 0.05). CONCLUSIONS: IFG and dyslipidemia are highly prevalent among HIV-infected ART-naïve Mexican patients, therefore, screening for glucose and lipids abnormalities always should be considered among ARTn patients.

ANTECEDENTES: Las alteraciones metabólicas se han vuelto más relevantes en el cuidado de los pacientes con infección por el virus de la inmunodeficiencia humana (VIH). Existe poca información sobre estas alteraciones en pacientes naïve a tratamiento antirretroviral (nTAR). OBJETIVO: Identificar la prevalencia de glucosa alterada en ayuno y dislipidemia entre individuos mexicanos con VIH nTAR e identificar los factores asociados. MÉTODO: Estudio retrospectivo en pacientes con VIH nTAR valorados en un hospital general de la Ciudad de México de 2009 a 2019. Se recabaron datos antropométricos, clínicos, bioquímicos y relacionados con el estado del VIH. RESULTADOS: Se incluyeron 221 pacientes, el 97% hombres, con mediana de edad 30 años (rango intercuartil [RIC]: 25-38), cuenta de linfocitos CD4 250 células/mm3 (RIC: 120.25-391) y carga viral log10 4.69 copias/ml (RIC: 3.64-5.25) de VIH-1 ARN. La prevalencia de glucosa alterada en ayuno fue del 22.6% y presentó asociación con sobrepeso-obesidad (razón de momios [RM]: 2.75; intervalo de confianza del 95% [IC95%]: 1.36-5.55; p < 0.05). La dislipidemia más frecuente fue la hipoalfalipoproteinemia (69.46%), asociada con CD4 < 250 (RM: 3.23; IC95%: 1.61-6.5; p < 0.05). CONCLUSIONES: Las alteraciones en el metabolismo de los lípidos y de la glucosa son frecuentes entre individuos mexicanos con VIH nTAR; por lo tanto, es importante una adecuada evaluación antes de iniciar el tratamiento.

Post-vaccination seropositivity against SARS-CoV-2 in peruvian health workers vaccinated with BBIBP-CorV (Sinopharm).

OBJECTIVE: To estimate the prevalence of post-vaccination seropositivity against SARS-CoV-2 and identify its predictors in Peruvian Social Health Insurance (EsSalud) personnel in 2021. METHODS: We conducted a cross-sectional study in a representative simple stratified sample of EsSalud workers. We evaluated IgG anti-SARS-CoV-2 antibodies response (seropositivity) by passive (previous infection) and active immunization (vaccination), and epidemiological and occupational variables obtained by direct interview and a data collection form. Descriptive and inferential statistics were used with correction of sample weights adjusted for non-response rate, and crude and adjusted odds ratio (OR) and geometric mean ratio (GMR) with their respective 95% confidence intervals (95%CI) were estimated. RESULTS: We enrolled 1077 subjects. Seropositivity was 67.4% (95%CI: 63.4-71.1). Predictors of seropositivity were age (negative relation; p < 0.001), previous infection (aOR = 11.7; 95%CI: 7.81-17.5), working in COVID-19 area (aOR = 1.47; 95%CI: 1.02-2.11) and time since the second dose. In relation to antibody levels measured by geometric means, there was an association between male sex (aGMR = 0.77; 95%CI: 0.74-0.80), age (negative relation; p < 0.001), previous infection (aGMR = 13.1; 95%CI:4.99-34.40), non-face-to-face/licensed work modality (aGMR = 0.78; 95%CI: 0.73-0.84), being a nursing technician (aGMR = 1.30; 95%CI: 1.20-1.41), working in administrative areas (aGMR = 1.17; 95%CI: 1.10-1.25), diagnostic support (aGMR = 1.07; 95%CI: 1.01-1.15), critical care (aGMR = 0.85; 95%CI: 0.79-0.93), and in a COVID-19 area (aGMR = 1.30; 95%CI: 1.24-1.36) and time since receiving the second dose (negative relation; p < 0.001). CONCLUSIONS: Seropositivity and antibody levels decrease as the time since receiving the second dose increases. Older age and no history of previous infection were associated with lower seropositivity and antibody values. These findings may be useful for sentinel antibody surveillance and the design of booster dose strategies.

Clinical-genetic findings in a group of subjects with macular dystrophies due to mutations in rare inherited retinopathy genes.

PURPOSE: To describe the results of clinical and molecular analyses in a group of patients suffering from inherited macular dystrophies, in which next-generation sequencing (NGS) efficiently detected rare causative mutations. METHODS: A total of eight unrelated Mexican subjects with a clinical and multimodal imaging diagnosis of macular dystrophy were included. Visual assessment methods included best corrected visual acuity, color fundus photography, Goldmann visual field tests, kinetic perimetry, dark/light adapted chromatic perimetry, full-field electroretinography, autofluorescence imaging, and spectral domain-optical coherence tomography imaging. Genetic screening was performed by means of whole exome sequencing with subsequent Sanger sequencing validation of causal variants. RESULTS: All patients exhibited a predominantly macular or cone-dominant disease. Patients' ages ranged from 12 to 60 years. Three cases had mutations in genes associated with autosomal dominant inheritance (UNC119 and PRPH2) while the remaining five cases had mutations in genes associated with autosomal recessive inheritance (CNGA3, POC1B, BEST1, CYP2U1, and PROM1). Of the total of 11 different pathogenic alleles identified, three were previously unreported disease-causing variants. CONCLUSIONS: Macular dystrophies can be caused by defects in genes that are not routinely analyzed or not included in NGS gene panels. In this group of patients, whole exome sequencing efficiently detected rare genetic causes of hereditary maculopathies, and our findings contribute to expanding the current knowledge of the clinical and mutational spectrum associated with these disorders.

Viabilidad y seguridad de la biopsia prostática transperineal en la era de fusión de imágenes por resonancia magnética cognitiva/ultrasonido en la detección del cáncer de próstata / Feasibility and safety of transperineal prostate biopsy in the era of cognitive magnetic resonance imaging/ultrasound fusion in prostate cancer detection

RESUMEN Objetivo : Describir los resultados de la biopsia prostática transperineal por fusión de la resonancia magnética cognitiva y ultrasonido en la detección del cáncer. Materiales y métodos : Estudio de serie de casos, retrospectivo, realizado en Clínica Delgado entre julio del 2019 y octubre del 2021. Se incluyó pacientes con examen digital de próstata y/o Antígeno Prostático Específico anormal e imágenes de Resonancia Magnética de próstata con lesiones categoría PI-RADS 4 o 5. Excluyendo a pacientes con trastorno de coagulación, lesiones rectales, imposibilidad para abducción, comorbilidades para anestesia. Registramos las características clínicas, demográficas, datos de antígeno prostático específico, volumen de la próstata, lesiones PI-RADS, tasas de cáncer, complicaciones. Resultados : Se evaluaron 18 pacientes, con edad media de 69,33 ± 7,67 años. La media del antígeno prostático específico de 14,94 ± 12,42 ng/mL. La media del volumen de próstata de 57,72 ± 28,68 cc. Al examen digital de la próstata 16/18 (88.88 %) pacientes tenían sospecha de cáncer. Se hicieron biopsias con 19 núcleos en pacientes cuya RMNmP tenían lesiones con categoría de PI-RADS 4 en 6/18 (33,33 %) de los cuales 3 resultaron positivas a Adenocarcinoma y otras 3 negativas a cáncer. Biopsia con 16 núcleos en PIRADS 5 en 12/18 (66,67 %) pacientes, resultando todas positivas a cáncer. Adenocarcinoma Acinar en 15/18 (83,33 %) con Gleason 6 en 2/18 (11,11 %) y Gleason ≥ 7 en 13/18 (72,22 %) pacientes. Complicaciones leves como hematuria 1/18 (5,6 %), disuria terminal 8/18 (44,4 %) y molestia perineal 7/18 (38,8 %) y ninguna infecciosa. Conclusiones : la biopsia prostática transperineal por fusión de imágenes de resonancia magnética cognitiva y ultrasonido es factible, segura, con tasas importantes de positividad y sin infecciones.

ABSTRACT Objective : To describe the results of transperineal prostate biopsy by fusion of cognitive magnetic resonance imaging and ultrasound in the detection of cancer. Materials and methods : A retrospective case series study conducted at the Delgado Clinic between July 2019 and October 2021. Patients with digital prostate examination and/or abnormal Prostatic Specific Antigen and prostate MRI images with category lesions were included PI-RADS 4 or 5. Excluding patients with coagulation disorders, rectal injuries, impossibility for abduction, comorbidities for anesthesia. We recorded clinical and demographic characteristics, prostate-specific antigen data, prostate volume, PI-RADS lesions, cancer rates, and complications. Results: 18 patients were evaluated, with a mean age of 69.33 ± 7.67 years. The mean prostate specific antigen was 14.94 ± 12.42 ng/mL. The mean prostate volume was 57.72 ± 28.68 cc. At the digital examination of the prostate, 16/18 (88.88%) patients had suspected cancer. Biopsies with 19 cores were performed in patients whose NMRmP had lesions with PI-RADS category 4 in 6/18 (33.33%), of which 3 were positive for Adenocarcinoma and another 3 were negative for cancer. Biopsy with 16 PIRADS 5 cores in 12/18 (66.67%) patients, all of which were positive for cancer. Acinar adenocarcinoma in 15/18 (83.33%) with Gleason 6 in 2/18 (11.11%) and Gleason ≥ 7 in 13/18 (72.22%) patients. Mild complications such as hematuria 1/18 (5.6%), terminal dysuria 8/18 (44.4%) and perineal discomfort 7/18 (38.8%) and none infectious. Conclusions : transperineal prostate biopsy by fusion of cognitive magnetic resonance imaging and ultrasound is feasible, safe, with significant positivity rates and without infections.

A new missense variant in RAB3GAP2 in a family with muscular dystrophy-short stature and defective autophagy: An expansion of the micro/Martsolf spectrum or a new phenotype?

We describe a sibling pair of Mennonite origin born from consanguineous parentage with a likely new phenotype of limb-girdle muscular dystrophy, short stature, ptosis, and tracheomalacia. Exome sequencing in the affected subjects identified a novel homozygous RAB3GAP2 missense variant as the potential causal variant. As RAB3GAP2 has been recently shown to be involved in the autophagy process, we analyzed patient-derived fibroblasts by fluorescence microscopy and demonstrated defective autophagic flux under rapamycin and serum starvation conditions when compared with wild-type cells. The phenotype in the siblings described here is distinct from Martsolf and Warburg's micro syndromes, the currently known diseases arising from RAB3GAP2 pathogenic variants. Thus, this work describes a potentially novel recessive phenotype associated with a RAB3GAP2 defect and manifesting as a muscular dystrophy-short stature disorder with no ocular anomalies. Functional analyses indicated defective autophagy in patient-derived fibroblasts, supporting the involvement of RAB3GAP2 in the etiology of this disorder. Our results contribute to a better characterization of the Martsolf/micro spectrum phenotype.

Navegación de pacientes con sospecha de cáncer de mama: Un estudio cualitativo en Lima, Perú / Patient navigation in women with suspected breast cancer: A qualitative study in Lima, Peru

Introducción: Identificar y describir los beneficios del sistema de navegación de las pacientes con sospecha de cáncer de mama. Identificar y describir las barreras a nivel personal de las usuarias y a las que se enfrentan institucionalmente hasta la obtención del diagnóstico definitivo. Material y Métodos: Estudio cualitativo fenomenológico. Se emplearon guías de observación y se realizaron entrevistas a profundidad para el recojo de información. Se recopilaron las experiencias de ocho personas, tres fueron personal de salud, y cinco pacientes. El personal de salud incluyo dos médicos varones y una ex ­navegadora en un hospital de la seguridad social de Lima. Resultados: Las pacientes que fueron acompañadas por la navegadora manifiestan que su apoyo les permitió transitar su etapa de enfermedad con mayor facilidad, tanto a nivel emocional como en lo relacionado a procesos institucionales. Las principales barreras percibidas institucionales son i) infraestructura y procesos hospitalarios ii) ineficiente seguimiento y monitoreo de pacientes. Desde el lado de la usuaria i) obligaciones familiares y domésticas ii) miedos y desconocimiento de la enfermedad iii) experiencias previas en el sistema de salud. Conclusiones: La navegación de pacientes permite un acompañamiento logístico y emocional que favorece la experiencia de la paciente. Las dificultades halladas a nivel hospitalario, lejos de desaparecer, logran ser reducidas, aligerando así el peso de algunos procesos institucionales que deben cargar las pacientes.

Objetives: To identify and to describe the main benefits of the navigation system from the perspective of patients with suspected breast cancer. Identify and describe the barriers at the personal level of the users and those that they face institutionally until the definitive diagnosis is obtained. Material and Methods: A qualitative study was carried out between January and March 2020. Observation and in-depth interviews were the information gathering tools used. The experiences of five patients and three members of the health personnel were collected in one hospital of Lima. Results: The patients who were accompanied by the navigators state that their support allowed them to go through their stage of illness with greater ease, both emotionally and bureaucratically. The main perceived institutional barriers are i) infrastructure and hospital processes ii) inefficient follow-up and monitoring of patients. From the user side i) family and domestic obligations ii) fears and ignorance of the disease iii) previous experiences in the health system. Conclusions: Patient navigation allows logistical and emotional support that favours the experience of the patient. The difficulties encountered at the hospital level, far from disappearing, manage to be reduced, thus lightening the bureaucratic burden that patients must carry. There is an emotional bond between the patients and the navigators. The level of these affective relationships is mainly related to the reality of the patient, specifically to her social support network

Navegación de pacientes con sospecha de cáncer de mama: un estudio cualitativo en Lima, Perú / Patient navigation in women with suspected breast cancer: a qualitative study in Lima, Perú

RESUMEN Objetivos: Identificar y describir los beneficios del sistema de navegación de las pacientes con sospecha de cáncer de mama. Identificar y describir las barreras a nivel personal de las usuarias y a las que se enfrentan institucionalmente hasta la obtención del diagnóstico definitivo. Métodos: Estudio cualitativo fenomenológico. Se emplearon guías de observación y se realizaron entrevistas a profundidad para el recojo de información. Se recopilaron las experiencias de ocho personas, tres fueron personal de salud, y cinco pacientes. El personal de salud incluyo dos médicos varones y una ex navegadora en un hospital de la seguridad social de Lima. Resultados: Las pacientes que fueron acompañadas por la navegadora manifiestan que su apoyo les permitió transitar su etapa de enfermedad con mayor facilidad, tanto a nivel emocional como en lo relacionado a procesos institucionales. Las principales barreras percibidas institucionales son i) infraestructura y procesos hospitalarios ii) ineficiente seguimiento y monitoreo de pacientes. Desde el lado de la usuaria i) obligaciones familiares y domésticas ii) miedos y desconocimiento de la enfermedad iii) experiencias previas en el sistema de salud. Conclusiones: La navegación de pacientes permite un acompañamiento logístico y emocional que favorece la experiencia de la paciente. Las dificultades halladas a nivel hospitalario, lejos de desaparecer, logran ser reducidas, aligerando así el peso de algunos procesos institucionales que deben cargar las pacientes.

ABSTRACT Objectives: To identify and to describe the main benefits of the navigation system from the perspective of patients with suspected breast cancer. Identify and describe the barriers at the personal level of the users and those that they face institutionally until the definitive diagnosis is obtained. Methods: A qualitative study was carried out between January and March 2020. Observation and in-depth interviews were the information gathering tools used. The experiences of five patients and three members of the health personnel were collected in one hospital of Lima. Results: The patients who were accompanied by the navigators state that their support allowed them to go through their stage of illness with greater ease, both emotionally and bureaucratically. The main perceived institutional barriers are i) infrastructure and hospital processes ii) inefficient follow-up and monitoring of patients. From the user side i) family and domestic obligations ii) fears and ignorance of the disease iii) previous experiences in the health system. Conclusions: Patient navigation allows logistical and emotional support that favours the experience of the patient. The difficulties encountered at the hospital level, far from disappearing, manage to be reduced, thus lightening the bureaucratic burden that patients must carry. There is an emotional bond between the patients and the navigators. The level of these affective relationships is mainly related to the reality of the patient, specifically to her social support network.

Anticuerpos neutralizantes, nuevas pruebas de laboratorio contra el SARS-CoV-2 / Neutralizing antibodies, new laboratory tests against SARS-CoV-2

RESUMEN Introducción: En la presente revisión conoceremos los detalles de esta nueva prueba de laboratorio, utilizada para cuantificar los anticuerpos neutralizantes contra el SARS-CoV-2. Esta prueba diagnóstica comienza a tener un mayor protagonismo, a razón del proceso de infección y vacunación en el mundo, para comprender los misterios del correlato de protección inmunológica. Contenido: Los anticuerpos neutralizantes pueden bloquear la capacidad del virus, para unirse al receptor ACE2 en las células humanas y estos anticuerpos permiten eliminar el efecto de microorganismos invasores. Su actividad se genera por las proteínas situadas en la superficie de los virus, a las que se unen para «bloquear¼ la infección. Los anticuerpos neutralizantes se definen in vitro por su capacidad para bloquear la entrada, fusión o salida del coronavirus, es decir son anticuerpos funcionales. En la actualidad existen diferentes pruebas de laboratorio (pruebas de inmunoensayo de alto rendimiento), que pueden detectar anticuerpos inmunoglobulinas G anti proteína S del SARS-CoV-2 y que se correlacionan con las pruebas de laboratorio idóneas para la determinación de estos anticuerpos. Es crucial que estas pruebas de inmunoensayo de alto rendimiento, sean validadas en su fabricación comparándolas con los métodos gold standard para determinar la presencia de anticuerpos neutralizantes. Perspectiva: Se pretende ampliar el conocimiento de esta nueva prueba, que en un futuro permitirán definir los valores de correlato inmunológico generados por las vacunas o por una infección previa.

ABSTRACT Introduction: In this review we will know the details of this new laboratory test, used to quantify neutralizing antibodies against SARS-CoV-2. This diagnostic test begins to have a greater role, due to the process of infection and vaccination in the world, to understand the mysteries of the correlate of immune protection. Content: Neutralizing antibodies can block the ability of the virus to bind to the ACE2 receptor in human cells and these antibodies allow to eliminate the effect of invading microorganisms. Their activity is generated by proteins on the surface of viruses, which they bind to "block" infection. Neutralizing antibodies are defined in vitro by their ability to block the entry, fusion or exit of the coronavirus, that is, they are functional antibodies. Currently there are different laboratory tests (high-throughput immunoassay tests), which can detect immunoglobulin G anti-protein S antibodies to SARS-CoV-2 and which correlate with the gold standard laboratory tests for the determination of these antibodies. It is crucial that these high-throughput immunoassay tests are manufacturing validated against gold standard methods to determine the presence of neutralizing antibodies. Perspective: This review aims to expand the knowledge of this new test, which in the future will allow defining the immunological correlate values generated by vaccines or by a previous infection.

Instrumentos para la investigación de la muerte súbita cardiovascular / Tools for the study of sudden cardiovascular death

Introducción: La mitad de las muertes cardiovasculares son debidas a una de las manifestaciones de mayor impacto y significación dentro de la enfermedad isquémica del corazón: la muerte súbita cardiovascular. Objetivo: Describir el Algoritmo Diagnóstico y el Modelo de Recolección del Dato Primario utilizados como instrumentos para la investigación de la muerte súbita cardiovascular en Cuba. Métodos: Se presenta un Algoritmo Diagnóstico con la metodología para el estudio de los casos de muerte súbita cardiovascular y un Modelo de Recolección del Dato Primario con las principales variables sociodemográficas, clínicas y anatomo-patológicas. Resultados: El Grupo de Investigación en Muerte Súbita ha desarrollado, en un periodo de 25 años (1995-2020), investigaciones científicas con la aplicación del Algoritmo Diagnóstico y el empleo del Modelo de Recolección del Dato Primario. De las 33 718 muertes naturales estudiadas mediante estos instrumentos, se han documentado 2252 decesos súbitos, lo que representa el 6,6 por ciento de la mortalidad global registrada. Conclusiones: Se hace necesario por los colectivos de investigación disponer de instrumentos que permitan ejecutar estudios poblacionales sobre la muerte súbita cardiovascular, considerando que el 90 por ciento de los eventos anualmente sobreviene en este grupo(AU)

Introduction: Half of all cardiovascular deaths are due to sudden cardiovascular death, one of the manifestations with the greatest impact and significance in the realm of ischemic heart disease. Objective: Describe the Diagnostic Algorithm and the Primary Data Collection Model used as tools to study sudden cardiovascular death in Cuba. Methods: A presentation is made of a Diagnostic Algorithm for the study of sudden cardiovascular death cases accompanied by the corresponding methodology, and a Primary Data Collection Model with the main sociodemographic, clinical and anatomopathological variables. Results: The Sudden Death Research Team has used the Diagnostic Algorithm and Primary Data Collection Model herein presented as a scientific research tool for a period of 25 years (1995-2020). Of the 33 718 deaths by natural causes studied with these tools, 2 252 have been sudden, representing 6.6 percent of the overall mortality recorded. Conclusions: Research teams should have access to tools for the conduct of population studies about sudden cardiovascular death, considering that 90 percent of the events recorded annually occur in this risk group(AU)

Nefrectomía laparoscópica en un hospital general

Objetivo: Describir los resultados de la nefrectomía laparoscópica en pacientes con riñones excluidos benignos, malignos y de donantes. Material y métodos: Estudio de serie de casos, retrospectivo, realizado en el Hospital Cayetano Heredia entre agosto del 2013 y mayo del 2019. Se incluyeron pacientes con riñones no funcionantes de cualquier etiología y riñón contralateral funcionante. Se excluyendo pacientes con pionefrosis severa. Se registraron sus características clínicas, demográficas, índice de masa corporal, etiología del riñón no funcionante, tasa de conversión, lateralidad, tiempo operatorio, histopatología de los riñones intervenidos, complicaciones, necesidad de transfusión, estancia hospitalaria y evolución de los pacientes intervenidos. Resultados: Se evaluaron 70 pacientes; en 39 (55,8%) se realizó nefrectomía laparoscópica simple por patología benigna, en 23 (32,8%) nefrectomía radical laparoscópica por cáncer y en 8 (11,4%) nefrectomía laparoscópica donante vivo. En 7 pacientes se tuvo que convertir a cirugía abierta. La media del tiempo operatorio fue 188,94 ± 33,41 min. Los resultados histopatológicos fueron pielonefritis crónica y carcinoma renal. No hubo variaciones clínicamente significativas en los niveles de hemoglobina, hematocrito, urea, creatinina. Las complicaciones según clasificación de Clavien: Grado I: 21(30%), II: 9(12,8%) y V: 1(1,4%). La media del tiempo de hospitalización fue 4,66 ± 2,97 días, con buena evolución postoperatoria en el 85,7% de los pacientes. Conclusión: La nefrectomía laparoscópica para riñones excluidos de patología benigna como maligna y de donantes de riñón, es una técnica mínimamente invasiva, reproducible, segura, efectiva y una alternativa a la cirugía abierta.

SUMMARY Objective: To report the findings of laparoscopic nephrectomies in patients with malignant, benignant and donor conditions. Material and Methods : A retrospective case series carried-out at Cayetano Heredia Hospital between August 2013 and May 2019. Patients with non-functioning kidneys of any etiology and contra lateral kidney functioning were included. Patients with severe pionephrosis were excluded. Demographic, clinical, body mass index, etiology of the nonfunctioning kidney, conversion rate, laterality, operating time, histopathology of the resected kidneys, complications, need for blood transfusion, hospital stay and clinical evolution. Results: 70 patients were evaluated; in 39 (55.8%) a simple laparoscopy for benign entities was performed; in 23 (32.8%) a radical nephrectomy for cancer was performed and in 8 (11.4%) a laparoscopy was performed for living donors. In 7 patients the laparoscopic procedure converted into open surgery. Mean operating time was 188.94 ± 33.41 min. Main histopathological findings were chronic pyelonephritis and renal carcinoma. Complications by Clavien classification were: Grade I: 21(30%), II: 9(12.8%) and V: 1(1.4%). Mean hospital stay was 4.66 ± 2.97 days; 85.7% had good clinical evolution. Conclusion : Laparoscopic nephrectomy for benign and malignant conditions as well as for kidney donors is a minimally invasive technique which is reproducible, safe, effective and therefore represents an alternative to open surgery.

Daño cardiovascular en la COVID-19: Una extensión de la enfermedad pulmonar / Cardiovascular injury in COVID-19: An extension of pulmonary disease

RESUMEN Ante la ocurrencia de un brote de neumonía en 59 pacientes sospechosos en un mercado local de mariscos en Wuhan, China, el 1 de diciembre de 2019 fue confirmado por el laboratorio el primer caso de un nuevo coronavirus, hasta entonces desconocido. El 7 de enero de 2020 fue identificado un nuevo tipo de virus de la familia Coronaviridae denominado SARS-CoV-2, agente causal de la enfermedad conocida como COVID-19. Los escasos informes iniciales limitaban la afectación al tracto respiratorio inferior. Con el progreso de la enfermedad y el cúmulo de evidencia científica, se demostró el papel fundamental que desempeña la afectación cardiovascular en el desarrollo y pronóstico de la infección. La edad es un predictor independiente de mortalidad y se ha demostrado una asociación entre la enfermedad cardiovascular preexistente y las formas graves de la enfermedad. La afectación cardiovascular puede ser directa o indirecta, se destacan el daño miocárdico agudo, la miocarditis, el infarto agudo de miocardio, la insuficiencia cardíaca, las arritmias y los eventos tromboembólicos venosos. Se añaden los efectos adversos del tratamiento de las complicaciones cardíacas y el ensayo con fármacos en los protocolos terapéuticos. En esta monografía se revisa el daño cardiovascular por la COVID-19.

ABSTRACT Faced with a pneumonia outbreak in 59 suspected patients at a local seafood market in Wuhan, China, the first case of a novel coronavirus was laboratory-confirmed on December 1, 2019. On January 7, 2020, a new type of virus of the family Coronaviridae called SARS-CoV-2 -causative agent of COVID-19- was identified. The few initial reports restricted involvement to the lower respiratory tract. Both, disease progression and build-up of scientific evidence, proved the crucial role played by cardiovascular involvement in the development and prognosis of the infection. Age is an independent predictor of mortality and an association between pre-existing cardiovascular disease and severe forms of the disease has been demonstrated. Cardiovascular involvement may be either direct or indirect; acute myocardial injury, myocarditis, acute myocardial infarction, heart failure, arrhythmias and venous embolic events stand out among others. Adverse effects of treatment for cardiac complications and drug testing in therapeutic protocols may be contributing aspects. This paper addresses cardiovascular involvement due to COVID-19.

Management of odonto-stomatological emergencies during the COVID-19 alarm state in dental clinics in the Autonomous Community of Madrid (CAM), Spain: An observational study

BACKGROUND: Odontology practice has been severely compromised by the pandemic caused by COVID-19 and Spain is one of the countries with higher incidence. Our aim with this study is to find out the number of cases and type of odonto-stomatological emergencies (OSE) treated in four dental clinics of the Madrid capital area and region (CAM) in the period covered between March 17th and 4th of May. MATERIAL AND METHODS: We search the cases in the demographic/epidemiological databases of the CAM regional government and the Illustrious Official College of Dentists and Stomatologists of the First Region (Madrid). RESULTS: We found that the most prevalent pathology was acute apical periodontitis whereas odontogenic abscess showed the lowest frequency. Prosthetic-orthodontic OSE represented 14% of cases. CONCLUSIONS: In this period of time, the most prevalent pathology acute apical periodontitis, odontogenic abscess reported the lowest frequency and prosthetic-orthodontic treatments were the third in number of cases. Most of OSE were resolved, without referring the patient to a hospital emergency department

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Cambios en el perfil de las urgencias atendidas por un dentista de guardia 24 horas durante las etapas iniciales de la primera ola de COVID-19 / Changes in urgent dental care provided by a 24-hour on-call dentist during the first wave of the covid-19 pandemic

OBJETIVO: Comparar la asistencia urgente prestada por un dentista de guardia 24 horas a dos grupos de pacientes en dos periodos de la primera ola de Covid-19 en Madrid: durante el confinamiento de la población y cierre de la mayoría de las clínicas dentales y una vez levantado el confinamiento y reabiertas las clínicas. MÉTODO: En ambos grupos se compararon edad y sexo, tiempo transcurrido desde el comienzo de los síntomas, frecuencia de citas nocturnas, frecuencia y duración de tratamientos médicos previos, patologías objeto de consulta y tratamientos realizados. RESULTADOS: En el primer periodo (45 días) se vieron 187 pacientes y en el segundo (19 días), 94 (4.15 y 4.8 pacientes/día, respectivamente). El tiempo transcurrido desde el comienzo de los síntomas en ambos periodos fue 10+/1 y 3+/-1 días. Habían recibido tratamiento antibiótico/antiinflamatorio previo el 80% y el 30% de los pacientes, respectivamente. El diagnóstico más frecuente en el primer periodo fue inflamación pulpar (p = 0.001) y en el segundo, pulpitis irreversible (p < 0.05). En el primer periodo se realizaron más extracciones (58.7% vs 41.5%, p < 0.05) y en el segundo más endodoncias (8.5% vs 2.1%, p < 0.05) y tratamientos farmacológicos (19.1% vs 9.6%, p < 0.05). CONCLUSIONES: Durante el segundo periodo de la primera ola de COVID-19, cuando el confinamiento se levantó y se reabrieron las clínicas, la atención dental urgente cambió con respecto a las primeras 6 semanas de confinamiento estricto, tanto en el perfil de la patología, como en los tratamientos realizados que fueron más conservadores

AIM: To compare urgent dental care provided by a general dentist 24-hours on-call at two early stages of the first wave of Covid-19 pandemic in Madrid (Spain): during the lockdown of the population and closure of most dental clinics, and once the lockdown was relaxed and dental offices partially reopened. METHOD: In both groups we compared demographic data, time elapsed from onset of symptoms, rate of late-night appointments, proportion of patients receiving pharmacologic treatment and frequencies of the pathologies causing the consultation and treatments performed. RESULTS: In the first and second stages -45 and 19 days respectively- 187 and 94 patients, (4.15 and 4.8 patients/day, respectively) were seen. The time elapsed from onset of symptoms was 10+/1 days in the first group and 3+/-1 days in the second, while 80% and 30% of patients were receiving some medical treatment respectively. Pulpal inflammation predominated in the first stage (p = 0.001) and irreversible pulpitis in the second (p < 0.05). Extractions were more frequent in the first stage (58.7% vs 41.5%, p < 0.05), and root canal therapy (8.5% vs 2.1%, p < 0.05) and pharmacological treatment (19.1% vs 9.6%, p < 0.05) in the second. CONCLUSION: During the second stage of the first wave of COVID-19 pandemic, once lockdown was partially relaxed, significant differences were observed in urgent dental care compared with the first six weeks of the pandemic, both in the profile of the pathology and the treatments provided, which were more conservative

Estudio de género en la muerte súbita cardiovascular / Study of Gender in Sudden Cardiovascular Death

RESUMEN Fundamento las enfermedades cardiovasculares representan la principal causa de muerte en el mundo, específicamente, la muerte súbita cardiovascular ocasiona el 50 % de todas las muertes por esta causa. Sin embargo, existen diferencias de género entre los determinantes que las producen. Objetivo describir el comportamiento de la muerte súbita cardiovascular según sexo en el municipio Arroyo Naranjo, en la Habana, Cuba, entre los años 2007 y 2014. Métodos se realizó un estudio descriptivo, correlacional y transversal, en el municipio habanero de Arroyo Naranjo, entre los años 2007 y 2014. Fueron incluidos todos los casos de muerte súbita cardiovascular, atendidos en el Hospital Clínico Quirúrgico Julio Trigo López (N=605). Se estudió la correlación de sexo y otros factores sociodemográficos (edad, nivel de escolaridad, ocupación, situación conyugal) y entre la variable sexo y factores de riesgo (diabetes mellitus, consumo de alcohol, tabaquismo, hábitos dietéticos, inactividad física, valor del hematocrito y dislipidemia). Se aplicaron a partir de variables los diferenciales determinantes entre hombres y mujeres. Se utilizó la prueba estadística Chi Cuadrado y el modelo de los Residuos Corregidos de Haberman. Resultados en los hombres los factores de riesgo más frecuentes fueron: el tabaquismo, el consumo de alcohol y la hipertensión arterial. Las mujeres se caracterizaron por más inactividad física y estuvieron más afectadas por diabetes mellitus, dislipidemia y valores elevados de hematocrito. Conclusión la muerte súbita cardiovascular en el municipio de Arroyo Naranjo de La Habana en el período analizado afectó a hombres fumadores y consumidores de alcohol siendo más hipertensos que las mujeres. Las mujeres con mayor inactividad física resultaron ser más diabéticas, dislipidémicas y presentaron un mayor valor referencial del hematocrito que los hombres.

ABSTRACT Background: cardiovascular diseases represent the main cause of death in the world, specifically, sudden cardiovascular death causes the 50 % of all deaths from this cause. However, there are gender differences between the determinants that produce them. Objective: to describe the gender differences in sudden cardiovascular death according to sex in the municipality of Arroyo Naranjo, in Havana, Cuba, between 2007 and 2014. Methods a descriptive, correlational and cross-sectional study was carried out in the Arroyo Naranjo municipality Havana, between 2007 and 2014. All cases of sudden cardiovascular death treated at the Julio Trigo López Clinical Surgical Hospital were included (N = 605). The correlation between sex and other sociodemographic factors (age, education, occupation, marital status), and between the variable sex and risk factors (diabetes mellitus, alcohol consumption, smoking, dietary habits, physical inactivity, hematocrit value and dyslipidemia). The determining differentials between men and women were applied from variables. The Chi Square statistical test and the Haberman Corrected Residuals model were used. Results: in men, the most frequent risk factors were: smoking, alcohol consumption and arterial hypertension. Women were characterized by more physical inactivity and were more affected by diabetes mellitus, dyslipidemia, and elevated hematocrit values. Conclusion sudden cardiovascular death in the municipality of Arroyo Naranjo, Havana, in the period analyzed affected men who smoked and consumed alcohol, being more hypertensive than women. Women with greater physical inactivity were found to be more diabetic, dyslipidemic, and presented a higher reference value of hematocrit than men.

Reuse of manganese sulfate as raw material by recovery from pesticide's wastewater using nanofiltration and electro-electrodialysis: process simulation and analysis from actual data.

Reuse of wastewater, as well as recovery of valuable, toxic or harmful products in industrial discharges, still represents an important issue, not only because it reduces the effect on receiving water bodies, but also because of the economic resources it represents for industry itself. In this research, in situ regeneration of Mn2SO4 is evaluated, for its reuse as the main raw material in the original process of a fungicide plant. The regeneration is evaluated by selective recovery of Mn2+, Zn2+ and SO4 = present in the wastewater produced by the industrial plant, and utilizing nanofiltration, electro-electrodialysis and chemical precipitation as separation alternatives. Each alternative was designed and evaluated technically and economically through simulations in Aspen Plus®, with data and information of the real process supplied by the company. Because zinc concentration is relatively low, its selective recovery was not attractive. The resulting Mn2SO4 solution and treated water quality in conventional alternatives were significantly poor with high costs. In contrast, nanofiltration and electro-electrodialysis alternatives generate water and by-products of higher quality and reuse potential with significantly lower costs. However, their viability depends on the membrane performance. The results were satisfactory, but future experimental studies are required to optimize the alternatives and define the correct pretreatment process.

Una visión peruana sobre los servicios de patología clínica: avances y agenda pendiente / A Peruvian view about clinical pathology services: progress and pending issues

RESUMEN Los países realizan muchos esfuerzos, para poder implementar los objetivos de desarrollo sostenible, en búsqueda de la cobertura universal de la salud. Sin embargo, el acceso o la oportunidad de los servicios de Patología Clínica de alta calidad y oportunos, son necesarios para respaldar los sistemas de atención médica que tienen la tarea de lograr estos objetivos. Este acceso es más difícil de lograr en los países de bajos y medianos ingresos. En este artículo especial, se realizó un análisis de la situación global y nacional de esta problemática, en esta especialidad médica. Se identifican las cuatro barreras clave para la provisión de servicios de calidad y óptimos: recursos humanos o capacidad de la fuerza laboral insuficiente, educación y capacitación inadecuada, infraestructura y equipamiento inadecuado, y calidad, normas y acreditación insuficientes.

ABSTRACT Countries do plenty of effort in order to implement the objectives for sustainable development, aiming to achieve universal health coverage. However, access or chances for having high quality Clinical Pathology services are both necessary for supporting medical care systems if such objectives are to be achieved. This access is much more difficult to achieve in low- and medium- income countries. This paper presents an analysis of both the global and local situation in this respect. Four key barriers for delivering high quality and optimal services were identified: insufficient human resources or limited capability of the working force, inadequate education and training, inadequate infrastructure and equipment, and insufficient quality, regulations, and accreditation strategies.