Características epidemiológicas de los pacientes atendidos en el sector de reanimación de un servicio de emergencia en un hospital de tercer nivel de Argentina / Epidemiological features of patients admitted to the resuscitation unit at an emergency department of a third level hospital in Argentina

Introducción. Conocer las características epidemiológicas (CE) de una población resulta primordial para la definición de estrategias sanitarias. Nuestro objetivo es describir las características de pacientes críticos ingresados al sector reanimación (SR). Materiales y métodos. Estudio descriptivo y retrospectivo realizado en un servicio de urgencias de un hospital de tercer nivel entre 2/7/2018 y 1/7/2019. Se incluyeron todos los pacientes ingresados a SR. Se registró edad, sexo, motivo de ingreso, condición crónica, procedimientos diagnósticos y terapéuticos efectuados. Los datos fueron obtenidos del libro de registro y la historia clínica informatizada, y analizados con software Redcap Versión 8.9.2. Las variables categóricas se expresaron como frecuencias y porcentajes y las continuas con mediana y rango intercuartílico. Resultados. Ingresaron 2292 pacientes. El 94% fueron menores de 16 años. El 56,5% presentaba condiciones crónicas (CC), siendo más frecuentes las enfermedades neurológicas (29%), endocrino/metabólicas (15,5%) y cardiovasculares (11%). Los motivos de ingreso más habituales: enfermedad respiratoria aguda baja (31%), estado epiléptico (13%), sepsis (13%) y deshidratación grave (7%). Estudios complementarios más utilizados: laboratorio (54%), radiografía (28%), hemocultivos (23%). Los procedimientos realizados con más frecuencia fueron la colocación de acceso venoso periférico (67%), cánula nasal de alto flujo (6%) y ventilación mecánica (5%). Las drogas más indicadas: oxígeno (42%), fluidos (34%), antibióticos (22%). El 14% ingresó a cuidados intensivos. Hubo 11 paros cardiorrespiratorios y 6 óbitos. Conclusiones. En el SR se asisten pacientes críticos con patologías de alta prevalencia como también pacientes con enfermedades crónicas complejas. La evaluación periódica de CE resulta una herramienta fundamental para detectar dificultades y elaborar estrategias de mejora (AU)

Introduction. Knowledge on the epidemiological characteristics (EC) of a population is essential to define healthcare strategies. Our aim was to describe the characteristics of critical patients admitted to the resuscitation unit (RU). Materials and methods. A descriptive and retrospective study was conducted at an emergency department of a third-level hospital between 2/7/2018 and 1/7/2019. All patients admitted to the RU were included. Age, sex, reason for admission, underlying disease, and diagnostic and therapeutic procedures performed were recorded. The data were obtained from the logbook and electronic records, and analyzed using Redcap software Version 8.9.2. Categorical variables were expressed as frequencies and percentages and continuous variables as median and interquartile range. Results. 2292 patients were admitted; 94% were younger than 16 years of age. Overall, 56.5% had underlying diseases (UD), the most common of which were neurological (29%), endocrine/metabolic (15.5%), and cardiovascular (11%) disorders. The most common reasons for admission were acute lower respiratory tract disease (31%), status epilepticus (13%), sepsis (13%), and severe dehydration (7%). The most frequently used complementary studies were laboratory tests (54%), x-rays (28%), and hemocultures (23%). The most frequently performed procedures were peripheral venous line (67%), high-flow nasal cannula (6%), and mechanical ventilation (5%) placement. The most frequently indicated medications were oxygen (42%), fluids (34%), and antibiotics (22%). Overall, 14% required admission to the intensive care unit. There were 11 cardiorespiratory arrests and six deaths. Conclusions. Critical patients with highly prevalent diseases as well as patients with complex underlying diseases are seen at the RU. Periodic EC evaluation is a key tool for detecting difficulties and developing improvement strategies (AU)

Triage hospitalario. La clasificación de la atención según el nivel de urgencia, en los servicios de urgencias / Hospital triage. Classification of care according to level of urgency, at emergency departments

El triage hospitalario en los servicios de urgencias es un proceso de valoración clínica preliminar. Permite clasificar a los pacientes según su nivel de urgencia y no por orden de llegada. Prioriza la asistencia de los pacientes graves. Organiza la atención de acuerdo a la demanda, los recursos físicos y humanos disponibles. Debe incluir protocolos que definan la clasificación del nivel de urgencia, los tiempos de asistencia y reevaluación, las intervenciones que se pueden ejecutar en el sector y el registro de las actuaciones. La clasificación del nivel de urgencia se define mediante el triángulo de evaluación pediátrica, el problema principal, las constantes vitales y la consideración de modificadores o alertas. Aunque resulta imprescindible, su uso no está uinversalmente difundido(AU)

At emergency departments, triage is the process of initial clinical assessment. It allows for the classification of patients based on their level of emergency regardless of order of arrival. It prioritizes care for severe patients and organizes care according to the demand and available physical and human resources. The triage should include protocols that define classification of the level of urgency, necessary times for care and reassessment, interventions that may be performed in the area, and recording of the activities. The level of emergency is classified based on the triad of pediatric assessment, consisting of the main complaint, vital signs, and consideration of modifiers or alerts. Although essential, it is not universally used (AU).

Expression of the Basophil-Specific Antibodies 2D7 and BB1 in Patients With Cutaneous Mastocytosis

Background: 2D7 and BB1 are thought to be basophil-specific markers. In this study, we tested both antibodies in different skin and mast cell disorders with the aim of determining whether it was possible to differentiate between benign and aggressive presentations of mastocytosis. Methods: Using the antibodies 2D7, BB1, and c-Kit, we performed an immunohistochemical study of skin biopsy specimens from patients with cutaneous mastocytosis (15 urticaria pigmentosa and telangiectatic macularis eruptive perstans) and liver or bone marrow biopsy specimens from patients with systemic mastocytosis. A basophil leukemia cell line was used as a reference. Peripheral blood basophils from healthy donors were used as controls. Results: We observed intense expression of 2D7 and BB1 in all skin biopsy specimens from patients with cutaneous mastocytosis. Immunostaining of liver and bone marrow specimens from patients with systemic mastocytosis with 2D7 and BB1 antibodies was negative. Specimens from patients with either type of mastocytosis showed similarly strong expression of c-Kit. The basophil cell line showed a 2D7 and a BB1 profile, with intense expression of c-Kit. Peripheral blood basophils exhibited notable immunostaining for 2D7, BB1, and c-Kit. Conclusions: 2D7 and BB1 are expressed in cutaneous mastocytosis, although this expression is lost when mast cell proliferation is systemic, thus reflecting either a different cellular differentiation stage or the presence of basophils in these skin diseases (AU)

Antecedentes: Los anticuerpos 2D7 y BB1 son marcadores específicos para basófilos. En el presente trabajo hemos estudiado el comportamiento de ambos marcadores en mastocitosis cutánea y sistémica, con el objeto de comprobar si las formas cutáneas benignas se podían diferenciar de las sistémicas. Métodos: Hemos realizado inminuhistoquímica de biopsias de 15 pacientes con matocitosis cutánea, empleando los anticuerpos c-Kit, 2D7 y BB1 y hemos comparado el resultado con biopsias hepáticas y de médula ósea de tres pacientes con mastocitosis sistémica frente a los mismos anticuerpos. Empleamos una línea celular de leucemia humana basofílica y basófilos aislados de un donante sano como controles. Resultados: Hallamos un patrón 2D7 y BB1 intensamente positivo en todas las muestras de mastocitosis cutánea y basófilos de donantes sanos. Sin embargo, tanto el anticuerpo 2D7 como BB1 fue negativo en las muestras hepáticas y de médula ósea de mastocitosis sistémica así como en la línea celular de leucemia basofílica. C-Kit se expresó intensamente en todas las muestras. Conclusión: 2D7 y BB1 se expresa en mastocitosis cutánea si bien se pierde cuando los mastocitos proliferan en su forma sistémica. Esto puede reflejar bien una diferenciación celular distinta o bien que los basófilos están presentes en las lesiones cutáneas de mastocitosis (AU)

Expression of the basophil-specific antibodies 2D7 and BB1 in patients with cutaneous Mastocytosis.

BACKGROUND: 2D7 and BB1 are thought to be basophil-specific markers. In this study, we tested both antibodies in different skin and mast cell disorders with the aim of determining whether it was possible to differentiate between benign and aggressive presentations of mastocytosis. METHODS: Using the antibodies 2D7, BB1, and c-Kit, we performed an immunohistochemical study of skin biopsy specimens from patients with cutaneous mastocytosis (15 urticaria pigmentosa and telangiectatic macularis eruptive perstans) and liver or bone marrow biopsy specimens from patients with systemic mastocytosis. A basophil leukemia cell line was used as a reference. Peripheral blood basophils from healthy donors were used as controls. RESULTS: We observed intense expression of 2D7 and BB1 in all skin biopsy specimens from patients with cutaneous mastocytosis. Immunostaining of liver and bone marrow specimens from patients with systemic mastocytosis with 2D7 and BB1 antibodies was negative. Specimens from patients with either type of mastocytosis showed similarly strong expression of c-Kit. The basophil cell line showed a 2D7 and a BB1 profile, with intense expression of c-Kit. Peripheral blood basophils exhibited notable immunostaining for 2D7, BB1, and c-Kit. CONCLUSIONS: 2D7 and BB1 are expressed in cutaneous mastocytosis, although this expression is lost when mast cell proliferation is systemic, thus reflecting either a different cellular differentiation stage or the presence of basophils in these skin diseases.

Discovering Alzheimer's disease and bipolar disorder white matter effects building computer aided diagnostic systems on brain diffusion tensor imaging features.

The aim of this study is to look for differential effects in white matter (WM) of bipolar disorder (BD) and Alzheimer's disease (AD) patients. We proceed by investigating the feasibility of discriminating between BD and AD patients, and from healthy controls (HC), using multivariate data analysis based on diffusion tensor imaging (DTI) data features. Specifically, support vector machine (SVM) classifiers were trained and tested on fractional anisotropy (FA). Voxel sites are selected as features for classification if their Pearson's correlation between FA values at voxel site across subjects and the indicative variable specifying the subject class is above the threshold set by a percentile of its empirical distribution. To avoid double dipping, selection was performed only on training data in a leave one out cross-validation study. Classification results show that FA features and a linear SVM classifier achieve perfect accuracy, sensitivity and specificity in AD vs. HC, BD vs. HC, and AD vs. BD leave-one-out cross-validation studies. The localization of the discriminant voxel sites on a probabilistic tractography atlas shows effects on seven major WM tracts in each hemisphere and two commissural tracts.

Computer aided diagnosis system for Alzheimer disease using brain diffusion tensor imaging features selected by Pearson's correlation.

The aim of this paper is to obtain discriminant features from two scalar measures of Diffusion Tensor Imaging (DTI) data, Fractional Anisotropy (FA) and Mean Diffusivity (MD), and to train and test classifiers able to discriminate Alzheimer's Disease (AD) patients from controls on the basis of features extracted from the FA or MD volumes. In this study, support vector machine (SVM) classifier was trained and tested on FA and MD data. Feature selection is done computing the Pearson's correlation between FA or MD values at voxel site across subjects and the indicative variable specifying the subject class. Voxel sites with high absolute correlation are selected for feature extraction. Results are obtained over an on-going study in Hospital de Santiago Apostol collecting anatomical T1-weighted MRI volumes and DTI data from healthy control subjects and AD patients. FA features and a linear SVM classifier achieve perfect accuracy, sensitivity and specificity in several cross-validation studies, supporting the usefulness of DTI-derived features as an image-marker for AD and to the feasibility of building Computer Aided Diagnosis systems for AD based on them.

[Regeneration of the ocular surface: stem cells and reconstructive techniques]. / Regeneración de la superficie ocular: stem cells/células madre y técnicas reconstructivas.

The cornea is a transparent tissue microscopically constituted by 5 well differentiated layers. The corneal epithelium is essential for corneal transparency and is found in a state of constant renovation throughout life on the basis of the population of limbocorneal stem cells. The localisation of these limbocorneal stem cells seems to be in the basal layers of the limbocorneal epithelium, of vital importance for maintaining the micro-environment of these limbocorneal stem cells, which depend on a variety of intrinsic and extrinsic factors. Limbic insufficiency occurs when there is a partial or total loss of these limbocorneal stem cells. These clinical features lead to a corneal clouding with a resulting loss of vision. In these cases, corneal transplant only represents a temporary replacement of the corneal epithelium; it is necessary to carry out a prior treatment involving transplant of the autologous or allogeneic limbus, which enables regeneration of the population of damaged limbocorneal cells. To reduce the risk involved in the transplant of the limbus of the donor eye, techniques of cultivation of limbocorneal cells on the basis of small limbocorneal biopsies are proposed.

Regeneración de la superficie ocular: stem cells/células madre y técnicas reconstructivas / Regeneration of the ocular surface: stem cells and reconstructive techniques

La córnea es un tejido transparente constituido microscópicamente por 5 capas bien diferenciadas. El epitelio corneal es esencial para la transparencia corneal y se encuentra en continua renovación a lo largo de la vida a partir de la población de células madre limbocorneales. La localización de estas células madre limbocorneales parece residir en las capas basales del epitelio limbocorneal, de vital importancia para mantener el microambiente de estas células madre limbocorneales, que depende de una variedad de factores intrínsecos y extrínsecos. La insuficiencia límbica se produce cuando ocurre una pérdida parcial o total de estas células madre limbocorneales. Este cuadro lleva a una opacificación corneal con la consiguiente pérdida de visión. En estos casos, el trasplante corneal supone únicamente un reemplazo temporal del epitelio corneal; es necesario llevar a cabo un tratamiento previo con trasplante de limbo autólogo o alogénico, que permita regenerar la población de células limbocorneales dañadas. Para disminuir el riesgo que supone el trasplante de limbo en el ojo donante, se han propuesto técnicas de cultivo de células limbocorneales a partir de pequeñas biopsias limbocorneales (AU)

The cornea is a transparent tissue microscopically constituted by 5 well differentiated layers. The corneal epithelium is essential for corneal transparency and is found in a state of constant renovation throughout life on the basis of the population of limbocorneal stem cells. The localisation of these limbocorneal stem cells seems to be in the basal layers of the limbocorneal epithelium, of vital importance for maintaining the micro-environment of these limbocorneal stem cells, which depend on a variety of intrinsic and extrinsic factors. Limbic insufficiency occurs when there is a partial or total loss of these limbocorneal stem cells. These clinical features lead to a corneal clouding with a resulting loss of vision. In these cases, corneal transplant only represents a temporary replacement of the corneal epithelium; it is necessary to carry out a prior treatment involving transplant of the autologous or allogeneic limbus, which enables regeneration of the population of damaged limbocorneal cells. To reduce the risk involved in the transplant of the limbus of the donor eye, techniques of cultivation of limbocorneal cells on the basis of small limbocorneal biopsies are proposed (AU)

[Update on the molecular biology of gliomas: towards a pathomolecular classification of gliomas]. / Actualización sobre la biología molecular de los gliomas: hacia una clasificación patomolecular de los gliomas.

AIM: To review the current state of the classification and oncogenesis of gliomas, emphasizing those biologic parameters with special clinical significance. DEVELOPMENT: In the current classification, both histologic grade and phenotype are considered the pathological features with more relevant clinical impact. These factors are an obligatory reference for both all molecular studies and a new classification. The relationship between the oligodendroglial phenotype and the loss of chromosomes 1p and 19q is a useful data in the histopathologic differential diagnosis. The new pathologic-molecular classification should take into account the current state of knowledge about the malignization pathways of gliomas, which have prognostic significance. The neoplastic biological potential should be determined in each case according with the tumoral heterogeneity. Then, this evaluation can be based on tumoral microdissection. Although no well established prognostic molecular profiles are available, several molecular alterations are relevant such as chromosome 10 deletion, especially of the 10q23 region, mutation of PTEN and TP53 genes and amplification or mutation of EGFR. For treatment purposes, the combined deletion 1p/19q identifies the anaplastic type of oligodendrogliomas that are more responsive to chemotherapy. CONCLUSIONS: The new pathomolecular classification of gliomas should improve the old one, especially being concerned about the oncogenesis and heterogeneity of these tumors. It is desirable that this classification has clinical applicability and can integrate new molecular findings with some known histological features with prognostic value.

Actualización sobre la biología molecular de los gliomas: hacia una clasificación patomolecular de los gliomas / Update on the molecular biology of gliomas: towards a pathomolecular classification of gliomas

Objetivo. Revisar el estado actual de la clasificación y oncogénesis de los gliomas, enfatizando aquellos factores biológicos con especial significación clínica. Desarrollo. En la clasificación actual, la gradación histológica de los gliomas, junto con el diagnóstico del tipo histológico, son los parámetros anatomopatológicos de mayor impacto clínico. Ambos factores constituyen una obligada referencia para todo estudio molecular y son la base para una nueva clasificación. La asociación de la estirpe oligodendroglial con la pérdida de las regiones cromosómicas 1p y 19q es muy útil en el diagnóstico diferencial histopatológico. La nueva clasificación patomolecular de los gliomas deberá considerar las sendas biológicas de malignización de los gliomas, ya que tienen un carácter pronóstico. Esta clasificación también deberá establecer la potencialidad biológica del tumor en función de la heterogeneidad, buscando estrategias originales como partir de material obtenido mediante microdisección. Si bien en la actualidad no existen perfiles moleculares pronósticos, ciertas alteraciones como la deleción del cromosoma 10, y en especial de la región 10q23, la mutación de los genes PTEN y TP53 y la amplificación o mutación del gen EGFR, resultan especialmente relevantes. De cara al tratamiento, la deleción combinada 1p/19q permite identificar a aquellos oligodendrogliomas anaplásicos especialmente quimiosensibles. Conclusiones. La nueva clasificación patomolecular de los gliomas, que no sustituirá sino que complementará a la actual, deberá considerar la oncogénesis y heterogeneidad de los gliomas. Esta nueva clasificación deberá tener aplicación clínica e integrar los nuevos hallazgos moleculares con los datos histopronósticos básicos

Aim. To review the current state of the classification and oncogenesis of gliomas, emphasizing those biologic parameters with special clinical significance. Development. In the current classification, both histologic grade and phenotype are considered the pathological features with more relevant clinical impact. These factors are an obligatory reference for both all molecular studies and a new classification. The relationship between the oligodendroglial phenotype and the loss of chromosomes 1p and 19q is a useful data in the histopathologic differential diagnosis. The new pathologic-molecular classification should take into account the current state of knowledge about the malignization pathways of gliomas, which have prognostic significance. The neoplastic biological potential should be determined in each case according with the tumoral heterogeneity. Then, this evaluation can be based on tumoral microdissection. Although no well established prognostic molecular profiles are available, several molecular alterations are relevant such as chromosome 10 deletion, especially of the 10q23 region, mutation of PTEN and TP53 genes and amplification or mutation of EGFR. For treatment purposes, the combined deletion 1p/19q identifies the anaplastic type of oligodendrogliomas that are more responsive to chemothetrapy. Conclusions. The new pathomolecular classification of gliomas should improve the old one, especially being concerned about the oncogenesis and heterogeneity of these tumors. It is desirable that this classification has clinical applicability and can integrate new molecular findings with some known histological features with prognostic value

Enfermedades quísticas del pulmón: hallazgos en la tomografía computarizada de alta resolución / Cystic diseases of the lung: high-resolution computed tomography findings

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Intestinal T-cell lymphoma associated with celiac disease masked by cavernous lymphangioma.

We present the case of a patient admitted to our emergency ward with a clinical setting of acute abdominal pain and a history of cavernous lymphangioma, diagnosed in another center by exploratory lapartomy. The patient presented complete analysis including serology tests, as well as an abdominal CT scan that revealed multiple large size retroperitoneal cysts. In view of the clinical symptomatology and results of the tests, a second CT scan was carried out upon admission. As a result of the findings obtained, a second exploratory laparotomy was carried out in which intestinal resection of the perforated jejunal loop and largest cysts was performed. Pathological anatomy diagnosed an intestinal lymphoma associated with enteropathy and abdominal cysts compatible with cavernous lymphangioma. In this work we describe both pathologies, the most characteristic aspects are analyzed and the etiology and possible relation between both entities is discussed.