Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
Add filters








Language
Year range
1.
Med. crít. (Col. Mex. Med. Crít.) ; 35(6): 319-328, Nov.-Dec. 2021. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1405553

ABSTRACT

resumen está disponible en el texto completo


Abstract: Introduction: The reference standard for the diagnosis of COVID-19 remains reverse transcriptase polymerase chain reaction (RT-PCR)-positive, while plain chest computed tomography (CT) has been more sensitive and specific in severity classification. In defining the severity of SARS-CoV-2, clinical, imaging and laboratory criteria have been specified, mentioning several markers, including lactate dehydrogenase (LDH). Historically, LHD has been of interest as a biomarker associated with lung damage, with a greater peak during the influenza A H1N1 pandemic, and taken as a marker in the definition of severity. Objective: To determine the diagnostic performance of serum LHD levels on admission to the ICU as a marker of severity in patients with SARS-CoV-2 infection. Material and methods: Observational, analytical, longitudinal and prospective study, carried out in two stages, the first (April 1, 2020 to September 30, 2020) consisted of a correlation study between serum LHD levels at Intensive Care Unit (ICU) admission and simple chest CT, a moderate correlation was obtained between serum LHD levels and severity score by pulmonary tomography, with an r = 0.5 and p < 0.0001; a severity-associated serum LHD cut-off point of 396 U/dL was obtained (p < 0.001, sensitivity 86.02%, specificity 75%). The second stage was extended until December 31, 2020, in which analysis is performed for diagnostic test performance, in inferential statistics correlation tests are performed, a multiple linear regression model is built, analysis was performed for diagnostic tests by building two-by-two contingency Tables, determining sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratios and Bayesian analysis. Results: 155 patients were included in the study to determine the diagnostic performance of serum LHD levels in patients with severe SARS-CoV-2 infection; by multiple linear regression analysis, it was determined that LHD levels on admission to the ICU is a predictor of severity in patients with SARS-CoV-2. A sensitivity of 0.92, specificity 0.41, with PPV 0.854, NPV 0.57 and an accuracy of 0.83, an LR + 1.57 and LR- 0.63 were obtained. In the post-test probability results, patients with DHL > 396 U/dL have a 86.3% probability of developing severe COVID-19. DHL levels have a direct correlation with ICU days of stay and days of invasive mechanical ventilation with statistical significance (p = 0.001, p = 0.033 respectively). Conclusion: Serum LHD levels have a high sensitivity to diagnose COVID-19 severity; and in the absence of simple chest CT, it can predict severe lung damage. It constitutes a test with high screening power in severe cases of COVID-19; with a probability of almost double (LR + 1.6) that of predicting a severe case.


Resumo: Introdução: O padrão de referência para o diagnóstico de COVID-19 continua sendo a reação em cadeia da polimerase com transcriptase reversa positiva (RT-PCR), enquanto a tomografia computadorizada (TC) de tórax simples tem se mostrado mais sensível e específica na classificação de gravidade. Na definição da gravidade do SARS-CoV-2, foram especificados critérios clínicos, de imagem e laboratoriais, mencionando vários marcadores, incluindo a desidrogenase láctica (DHL). A DHL ao longo da história tem sido de interesse como biomarcador associado a danos pulmonares, com maior boom durante a pandemia de influenza A H1N1, e tomado como marcador na definição de gravidade. Objetivo: Determinar o desempenho diagnóstico de dois níveis séricos de DHL na admissão à UTI como marcador de gravidade em pacientes com infecção por SARS-CoV-2. Métodos: Estudo observacional, analítico, longitudinal e prospectivo, realizado em duas etapas, a primeira (01 de abril de 2020 a 30 de setembro de 2020) consistiu em um estudo de correlação entre os níveis séricos de DHL na admissão na UTI e TC simples de tórax, um foi obtida correlação entre os níveis séricos de DHL e o escore de gravidade pela tomografia pulmonar, com r 0.5 ep < 0.0001; um ponto de corte para DHL sérico associado à gravidade de 396 U/dL foi obtido (p < 0.001, sensibilidade 86.02%, especificidade 75%). A segunda etapa foi estendida até 31 de dezembro de 2020, na qual são realizadas análises para realização de testes diagnósticos, testes de correlação em estatística inferencial, construção de um modelo de regressão linear múltipla, análise para testes diagnósticos, construção tabelas de contingência dois a dois, determinando sensibilidade, especificidade, valor preditivo positivo, valor preditivo negativo, razões de verossimilhança e análise Bayesiana. Resultados: 155 pacientes foram incluídos no estudo para determinar o desempenho diagnóstico dos níveis séricos de DHL em pacientes com infecção grave por SARS-CoV-2; pela análise de regressão linear múltipla, determina-se que os níveis de DHL na admissão à UTI é um preditor de gravidade em pacientes com SARS-CoV-2. Obteve-se sensibilidade de 0.92, especificidade de 0.41, com VPP 0.854, VPN 0.57 e exatidão de 0.83, LR+ 1.57 e LR- 0.63. Nos resultados de probabilidade pós-teste, pacientes com DHL > 396 U/Dl têm probabilidade de 86.3% de desenvolver doença grave por COVID-19. Os níveis de DHL têm correlação direta com os dias de permanência na UTI e os dias de tratamento invasivo ventilação mecânica com significância estatística (p = 0.001, p = 0.33 respectivamente). Conclusão: Os níveis séricos de DHL têm alta sensibilidade para diagnosticar gravidade por COVID-19; e na ausência de TC simples de tórax, pode predizer danos pulmonares graves. Constitui um teste com alto poder de escrutínio em casos graves de COVID-19; com quase o dobro da probabilidade (LR + 1.6) de predizer uma condição grave.

2.
Rev. cuba. hematol. inmunol. hemoter ; 36(4): e1097, oct.-dic. 2020. tab, graf
Article in Spanish | LILACS, CUMED | ID: biblio-1289414

ABSTRACT

Introducción: El término hemólisis hace referencia a la destrucción de los eritrocitos y ocurre en un amplio rango de condiciones clínicas fisiológicas y patológicas. Es empleado para definir situaciones en la que la vida media de los eritrocitos está disminuida por causas mecánicas, tóxicas, autoinmunes o infecciosas. Objetivo: Describir los principales marcadores de hemólisis que se encuentran variablemente alterados en las diferentes formas de anemias hemolíticas. Métodos: Se realizó una revisión de la literatura, en inglés y español, a través del sitio web PubMed y el motor de búsqueda Google Académico de artículos publicados en los últimos 10 años. Se hizo un análisis y resumen de la información. Análisis y síntesis de la información: La hemoglobina es el marcador más directo de la gravedad clínica en las enfermedades hemolíticas. Sus valores pueden estar muy próximos a los valores de referencia en las formas ligeras (Hb > 100 g/L) o significativamente reducidos en las moderadas (Hb entre 80-100 g/L), graves (Hb entre 60-80 g/L) y muy graves (Hb < 60 g/L). Sin embargo, existen otros marcadores esenciales para diferenciar las formas de presentación aguda y crónica, la hemólisis extravascular de la intravascular y la presencia de signos extrahematológicos tales como: los reticulocitos y esquistocitos, la deshidrogenasa láctica, la haptoglobina, la bilirrubina, la ferritina y la hemosiderinuria. Conclusiones: Los parámetros hemolíticos pueden estar diferencialmente alterados en varias condiciones lo cual ayuda en la realización del diagnóstico diferencial de las anemias hemolíticas(AU)


Introduction: The term hemolysis refers to the destruction of erythrocytes, a process occurring in a wide range of physiological and pathological clinical conditions. The term is used to define situations in which mean erythrocyte lifespan is reduced due to mechanical, toxic, autoimmune or infectious causes. Objective: Describe the main markers of hemolysis found to be variably altered in the different forms of hemolytic anemias. Methods: A review was conducted of the literature about the topic published in English and Spanish in the website PubMed and the search engine Google Scholar in the last 10 years. Data were analyzed and summarized. Data analysis and synthesis: Hemoglobin is the most direct marker of clinical severity in hemolytic diseases. Its values may be very close to reference levels in mild disease (Hb > 100 g/l), whereas they will be significantly reduced in moderate (Hb 80-100 g/l), severe (Hb 60-80 g/l) and very severe disease (Hb < 60 g/l). However, other markers are also essential to distinguish acute from chronic presentation, extravascular from intravascular hemolysis, and the presence of extrahematological signs such as reticulocytes and schistocytes, lactate dehydrogenase, haptoglobin, bilirubin, ferritin and hemosiderinuria. Conclusions: Differentially altered hemolytic parameters may be found in several conditions, which makes them useful for the differential diagnosis of hemolytic anemias(AU)


Subject(s)
Humans , Biomarkers , Anemia, Hemolytic, Congenital/diagnosis , Diagnosis, Differential
3.
Ginecol. obstet. Méx ; 86(3): 165-173, feb. 2018. tab, graf
Article in Spanish | LILACS | ID: biblio-984415

ABSTRACT

Resumen OBJETIVO Evaluar si la prescripción de ácido tranexámico a pacientes con síndrome de HELLP mejora su curso clínico en forma general. MATERIALES Y MÉTODOS Estudio retrospectivo, analítico y comparativo al que se incluyeron dos grupos de pacientes con diagnóstico de síndrome de HELLP atendidas entre enero de 2015 y diciembre de 2016 en el servicio de Ginecología y Obstetricia del Hospital Universitario de Saltillo. A un grupo se le indicó ácido tranexámico y al control ningún medicamento. RESULTADOS Se incluyeron 18 pacientes, 9 en cada grupo. Parámetros de laboratorio: plaquetas mayores a 105 vs menores a 105 en el grupo control. La deshidrogenasa láctica (DHL) tuvo un decremento de 58 vs 16% en las pacientes tratadas en las primeras 48 horas. La aspartato aminotransferasa (TGO) mejoró 56 vs 43% en el grupo control y la alanina aminotransferasa (TGP) mejoró 31 vs 20% en el grupo control, ambas en las primeras 24 horas. La cuantificación de proteínas en orina en 24 horas reportó 2867 mg versus 3378 mg en el grupo control. La hemoglobina permaneció siempre en cifras superiores a 11 vs 9.92 g/dL del grupo control. Los días de estancia en la unidad de cuidados intensivos fue de 3 vs 4.16 del grupo control. CONCLUSIONES Hacen falta más estudios con asignación al azar, con una muestra más amplia, para valorar las ventajas y efectos del ácido tranexámico en pacientes con síndrome de HELLP. La prescripción de este medicamento representa una alternativa en el tratamiento del síndrome de HELLP, que proporciona un beneficio clínico.


Abstract OBJECTIVE To stablish if the use of tranexamic acid (TXA) in patients with HELLP syndrome improves the clinic curse in general terms. MATERIALS AND METHODS Analytic, comparative and retrospective study where two groups of patients are included, which assisted to the obstetrics and gynecology service in the Hospital Universitario de Saltillo, where the diagnosis of HELLP syndrome was made. Tranexamic acid was given to one of the groups versus the control group without the drug. RESULTS 18 patients were included, 9 in each group. The following was observed respect to the laboratory parameters: platelets greater than 105 vs smaller than 105 in the control group. The lactate dehydrogenase (DHL) had a decrease of 58 vs 16% in the patients without tranexamic acid in the first 48 hours. The aspartate aminotransferase (AST) improved 56 vs 43% in the control group, and the alanine aminotransferase (ALT) improved 31 vs 20% in the control group, both in the first 24 hours. The report of protein quantification in 24 hours was 2867 vs 3378 mg in the control group. The hemoglobin figures remained greater than 11vs 9.92 g/dL of the control group. The days of stay in the intensive care unit (UCI) were 3 vs 4.16 of the control group. CONCLUSIONS: Randomized studies are required with an extended sample, to value the benefits and effects of the tranexamic acid, in this kind of patients. According to the collected data the use of tranexamic acid represents an alternative in the treatment of HELLP syndrome, which provides a clinic benefit.

4.
Rev. cuba. hematol. inmunol. hemoter ; 26(3): 206-215, sep.-dic. 2010.
Article in Spanish | LILACS | ID: lil-584701

ABSTRACT

Se evaluaron 104 pacientes adultos con anemia drepanocítica clasificados en: grupo 1 (G1) pacientes sin hipertensión pulmonar (HTP) (n=74); y grupo 2 (G2) pacientes con HTP (n=30). Se observó disminución estadísticamente significativa para la hemoglobina, el hematócrito y la oximetría de pulso, y aumento significativo de los leucocitos, la deshidrogenasa láctica, la bilirrubina total e indirecta, la creatin-kinasa MB y la creatinina en los pacientes del G2. La prueba de X² mostró diferencia significativa entre los grupos para el síndrome torácico agudo (p=0,05) con mayor frecuencia en el G2. La frecuencia de HTP en el total de enfermos evaluados fue del 28,8 por ciento. Las extrasístoles ventriculares fueron las alteraciones más frecuentes en el electrocardiograma en el G1, y la hipertrofia del ventrículo izquierdo en el G2; mientras que en el ecocardiograma Doppler fue la dilatación del ventrículo izquierdo en ambos grupos. De los casos diagnosticados con HTP (n=30), 27 (73,3 por ciento) fueron clasificados como grado 1; 7 (23,3 por ciento) grado 2 y 1 (3,4 por ciento) grado 3


A total of 104 adult patients presenting with sickle cell disease were assessed and classified into: group 1 (G1) patients without pulmonary hypertension (PHT) (n = 74) and group 2 (G2) patients with PHT (n = 30). There was a statistically significant decrease for hemoglobin, hematocrit and pulse oximeter and a significant increase of leukocytes, the lactic dehydrogenase, the total and indirect bilirubin, la MB creatine kinase and the creatinine in the G2-patients. The X² test demonstrate a significant difference among groups for the acute thoracic syndrome (p = 0,05) more frequent in the G2. The PHT frequency in all patients assessed was of 28,8 percent. The ventricular extrasystoles were the more frequent alterations in the electrocardiogram in the G1 and the left ventricle hypertrophy in the G2; whereas in the Doppler echocardiogram the more frequent as the left ventricle dilatation in both groups. From the cases diagnosed with PHT (n = 30), 27 (73,3 percent) were classified as 1 degree; 7 (23,3 percent) 2 and 1 degrees (3,4 percent) 3 degree


Subject(s)
Humans , Male , Adult , Female , Anemia, Sickle Cell/complications , Hemolysis , Hypertension, Pulmonary/diagnosis , Hypertension, Pulmonary/etiology
SELECTION OF CITATIONS
SEARCH DETAIL