Combinaciones más frecuentes y características clínicas y de estudios complementarios de pacientes pediátricos con dengue / Most common symptom combinations, clinical features and supplementary test characteristics of pediatric

Introducción: el dengue es una enfermedad viral, con un amplio espectro clínico. Objetivos: describir las características clínicas y de laboratorio, y determinar las combinaciones de síntomas y signos más frecuentes halladas en pacientes pediátricos con sospecha de dengue, internados en el Hospital Docente Pediátrico del Cerro. Métodos: se realizó un estudio analítico, transversal, retrospectivo, a un universo de 1 300 pacientes ingresados entre enero y diciembre de 2012, con una muestra de 260 enfermos. Se estudiaron las variables síntomas y signos, además se hallaron las medianas de los valores de laboratorio hematócrito, conteo leucocitario y plaquetario. Se establecieron asociaciones predictivas de tener dengue según grupo de edades, para lo cual se determinó odds ratio (OR). Resultados: los síntomas más frecuente estuvieron representados por: cefalea, artromialgias, dolor retroocular y rash; los complementarios solo mostraron tendencia a la leucopenia. Las combinaciones predictivas de dengue halladas fueron: fiebre, exantema y prueba del lazo positiva en todas las edades. La fiebre, exantema y artromialgias para adolescentes (OR= 28,7; IC 95 por ciento 3,98-58,3; p= 0,0001) y escolares (OR= 13,32; IC 95 por ciento 1,74-28,0; p= 0,0001); mientras que la fiebre, cefalea, dolor retroocular y exantema en el grupo adolescentes (OR= 9,57; IC 95 por ciento; 3,63-26,85; p= 0,00001). Conclusiones: en este estudio la clínica varía con la edad, sin incluir síntomas respiratorios, no así los análisis. La asociación de síntomas y signos deben ser tenidas en cuenta de acuerdo con los grupos de edad, y resultaron semejantes los encontrados en los adolescentes con lo reportado en adultos(AU)

Introduction: dengue is a viral disease of broad clinical spectrum. Objectives: to describe the clinical and laboratory characteristics, and to determine the most common sign and symptom combinations found in pediatric patients suspected of dengue, who had been admitted to the teaching pediatric hospital in Cerro municipality. Methods: a retrospective, cross-sectional and analytical study was conducted in a sample of 260 patients from a universe of 1 300 patients admitted to hospital from January to December 2012. The study variables were symptoms and signs in addition to estimating the medians of hematocrit, leukocyte and platelet count values at lab. Predictive associations of having dengue were set according to age groups for which odds ratios were determined. Results: the most frequent symptoms were headache, arthromyalgias, retroocular pain and rash whereas the supplementary tests just showed tendency to leucopenia. The predictive combinations for dengue were fever, exanthema and positive tourniquet test at all ages; fever, exanthema and arthromyalgias for adolescents(OR= 28.7; 95 percent CI 3.98-58,3; p= 0.0001) and schoolchildren (OR= 13.32; 95 percent CI 1.74-28.0; p= 0.0001) and fever, headache, retroocular pain and exanthema for the adolescent group (OR= 9.57; IC 95 percent; 3.63-26.85; p= 0.00001). Conclusions: in this study, the clinical characteristics vary with the age, excluding the respiratory symptoms, but it is not the same in the supplementary tests. The associations of symptoms and signs should be taken into account depending on the age group and those found in adolescents were similar to the ones reported in adults(AU)

Evaluation of the diagnostic value of the tourniquet test in predicting severe dengue cases in a population from Belo Horizonte, State of Minas Gerais, Brazil

Introduction Dengue is prevalent in many tropical and sub-tropical regions. The clinical diagnosis of dengue is still complex, and not much data are available. This work aimed at assessing the diagnostic accuracy of the tourniquet test in patients with suspected dengue infection and its positivity in different classifications of this disease as reported to the Information System for Notifiable Disease in Belo Horizonte, State of Minas Gerais, Brazil between 2001 and 2006. Methods Cross-section analysis of the diagnostic accuracy of the tourniquet test for dengue, using IgM-anti-DENV ELISA as a gold standard. Results We selected 9,836 suspected cases, of which 41.1% were confirmed to be dengue. Classic dengue was present in 95.8%, dengue with complications in 2.5% and dengue hemorrhagic fever in 1.7%. The tourniquet test was positive in 16.9% of classic dengue cases, 61.7% of dengue cases with complications and 82.9% of cases of dengue hemorrhagic fever. The sensitivity and specificity of the tourniquet test were 19.1% and 86.4%, respectively. Conclusions A positive tourniquet test can be a valuable tool to support diagnosis of dengue where laboratory tests are not available. However, the absence of a positive test should not be read as the absence of infection. In addition, the tourniquet test was demonstrated to be an indicator of dengue severity. .

Utilidad de la prueba torniquete en el diagnóstico diferencial de Dengue de otros síndromes febriles / Usefulness of the tourniquet test in the differential diagnosis of Dengue of others febrile syndromes

Introducción: El dengue es la infección transmitida por mosquitos más importante en el mundo. Siendo más susceptible a infectarse la población infantil. En la etapa inicial de la enfermedad los síntomas son indiferenciables de otros síndromes febriles agudos, situación que hace complejo, tardío y poco sensible el diagnóstico clínico en la fase aguda de la enfermedad. La prueba torniquete es utilizada como un criterio de clasificación para definir la severidad del dengue hemorrágico por la Organización Mundial de la Salud, podría utilizarse en el diagnóstico diferencial del dengue. Objetivo: Evaluar en población infantil las características operativas de la prueba torniquete en el diagnóstico diferencial del dengue de otros síndromes febriles agudos. Métodos: Entre junio de 2006 y Abril del 2008 se incluyeron del servicio de urgencias pacientes entre dos y 12 años de edad que presentaban un cuadro febril sin origen aparente. Se les realizó un examen físico estandarizado junto con la prueba de torniquete, calculándose la sensibilidad, especificidad, valor predictivo positivo (VPP) y negativo (VPN) a la prueba. Resultados: Se captaron 129 pacientes y se diagnosticaron 66 casos de dengue. La prueba torniquete tuvo sensibilidad de 60.6% (IC95%=48.8-72.4), especificidad 55.9% (IC95%=43.3-68.6), VPP 60.6% (IC95%=48.8-72.4) y un VPN 55.9%. (IC95%=43.3-68.6). El resultado de la prueba estuvo asociado al tiempo de tolerancia del torniquete (p<0.001). Conclusiones: La prueba torniquete por sí sola no es útil como herramienta clínica para diferenciar el dengue de otros síndromes febriles en niños entre los dos y los 12 años de zonas endémicas.

Introduction: Dengue is a mosquito-borne infection most important in the world. The infant population is more susceptible to infection. In the early stage of the disease the symptoms are indistinguishable from others acute febrile syndromes, a situation that makes it complex, slow and little sensitive the clinical diagnosis in the acute phase of illness. The tourniquet test is used as a classification criterion to define the severity of dengue hemorrhagic fever by the World Health Organization and could be used in the differential diagnosis of dengue. Objective: To evaluate in children the operational characteristics of the tourniquet test in the differential diagnosis of dengue from acute febrile other syndromes. Methods: Between June 2006 and April 2008 were included patients between two and 12 years, who had a fever without apparent source in the emergency department. Were evaluated by a standardized physical examination with the tourniquet test. We calculated the sensibility, specificity, positive predictive value (PPV) and negative (NPV) to the test. Results: 129 patients were captured and 66 dengue cases were diagnosed. The tourniquet test had a sensitivity of 60.6% (95% CI = 48.8-72.4), specificity 55.9% (95% CI = 43.3-68.6), PPV 60.6% (95% CI = 48.8-72.4) and NPV 55.9%. (95% CI = 43.3-68.6). The result of the test was associated with tourniquet tolerance time (p <0.001). Conclusions: The tourniquet test by itself is not useful as a clinical tool to differentiate dengue from other febrile syndromes in children between two and 12 years in endemic areas.

Prueba de torniquete como predictiva de sangrado espontáneo en casos de dengue clásico por den-2 / Tourniquet test as predictive of spontaneous bleeding in classic dengue, den-2, cases

Objetivo: Determinar el valor de la prueba de torniquete como predictiva de sangrado espontáneo en pacientes afectados por dengue clásico en un brote por el virus DEN-2. Materiales y métodos: Se realizó un estudio caso-control con una población de 267 pacientes egresados de la Unidad de Atención del Dengue del Hospital Monseñor Sanabria en Puntarenas, con diagnóstico de dengue clásico, en el periodo de julio de 1999 a junio de 2002, durante el brote de virus DEN-2 en la Región Pacífico Central de Costa Rica. Hubo un total de 61 pacientes con sangrado espontáneo, casos, y 181 pacientes sin el evento, controles. Se calculó la capacidad predictiva de la prueba de torniquete mediante una tabla de contingencia con la que se determinaron las características diagnósticas de la prueba así como la razón de posibilidades, Odds ratio y la fracción etiológica, tomando como prueba de oro la condición de sangrado espontáneo. Resultados: La sensibilidad y especificidad de la prueba fueron 41.0 por ciento y 75.1 por ciento, respectivamente; asimismo, el valor predictivo positivo fue de 35.7 por ciento, mientras que el valor predictivo negativo fue de 79.1 por ciento. Los pacientes con diagnóstico de dengue por DEN-2 con la prueba de torniquete positivo tuvieron el doble de posibilidad de sufrir de sangrado espontáneo que aquellos con resultado negativo a la prueba, OR igual 2.1; IC 95 por ciento: 1.1-3.9. Conclusión: La prueba de torniquete no es confiable para indicar fragilidad capilar y no debería utilizarse de manera definitiva para clasificar al paciente que requiere hospitalización por DEN-2.

Objective: To determine the significance of the tourniquet test as predictive of spontaneous bleeding in classic dengue fever patients in an DEN-2 virus outbreak. Materials and methods: A casecontrol study on 267 patients at the Dengue Unit of the Monseñor Sanabria Hospital in Puntarenas, diagnosed as classic dengue fever, between July 1999 and June 2002, during the Central Pacific Area DEN-2 virus outbreak. There were a total of 61 patients with spontaneous bleeding (cases) and 181 controls. The predictive ability of the tourniquet test, the odds ratio and the etiologic fraction were assessed using a 2x2 table, using the spontaneous bleeding condition as golden standard. Results: Sensitivity and specificity of the positive tourniquet were 41.0% and 75.1%, respectively; besides, the predictive positive value was 35.7% while the predictive negative value was 79.1%. Patients diagnosed with dengue by DEN-2 virus, with a tourniquet positive test had two times the chance of spontaneous bleeding than those with a negative test (OR= 2.1, 95% IC: 1.1-3.9). Conclusion: The tourniquet test is not reliable to predict capillary fragility; hence it should not be used to classify patients that require hospitalization in cases of dengue fever caused by DEN-2 virus.

A retrospective study of dengue hemorrhagic fever in pediatric patients of the Divine Word University Hospital, Tacloban City

A retrospective study was undertaken in 39 pediatric patients with Dengue Hemorrhagic Fever admitted to the Divine Word University Hospital, Tacloban City between January 1985 and December 1989. Diagnosis was based on the WHO (World Health Organization) case definitions for Dengue Hemorrhagic Fever/Dengue Shock Syndrome (DHF/DSS) Of the 39 patients, females (64%) outnumbered the males and 51% were females above 4 years old. The nutritional status of most of these patients (92%) were within normal. Majority (72%) had their residence with in Tacloban City. The most common hemorrhagic manifestations were a positive tourniquet test (100%), petecchiae (84%), rash (62%) and epistaxis (26%) while the most common non-specific manifestations were fever (100%), vomiting (51%) and abdominal pain (41%). The difference of the duration of the fever between males and females and the different age groups was not significant. The platelet count was 100,000/mm3 or less in 9 patients (23%). One patient had pleural effusion. One of the two patients who had hypotension died within 24 hours from admission.