Puntaje APP como predictor de mortalidad en pacientes con síndrome de dificultad respiratoria agudo grave por COVID-19 en un hospital referencial del norte del Perú / APP score as a predictor of mortality in patients with severe acute respiratory distress syndrome due to COVID-19 in a reference hospital in northern of Peru

INTRODUCCIÓN: La mortalidad por pacientes por COVID-19 grave que desarrollaban neumonía grave y síndrome de dificultad respiratoria agudo (SDRA) grave ha sido significativa a pesar del tratamiento oportuno. Es importante determinar predictores tempranos de enfermedad que nos ayuden a estratificar aquellos pacientes con mayor riesgo de fallecer. Se pretende estudiar el comportamiento del puntaje APP (APPS) como predictor de ello, basados en algunos reportes de uso y utilidad en el SDRA. no COVID-19. OBJETIVO: Determinar si el APPS es útil como predictor de mortalidad en SDRA. por COVID-19 grave. PACIENTES Y MÉTODO: Se realizó un estudio tipo cohorte retrospectivo, incluyendo pacientes de la Unidad de Cuidados Intensivos (UCI), con SDRA. por COVID-19 grave, que ingresaron a la UCI del Hospital Regional Docente de Trujillo (HRDT) en el período abril 2020- abril 2021. Se evalúo la utilidad del APPS como predictor de mortalidad em dicha población. RESULTADOS: El APPS demostró ser un factor asociado a mortalidad en pacientes con SDRA. y COVID-19 grave (RPa 1,34; IC 95% 1,16 a 1,56; p < 0,001). Además, encontramos que, al realizar un modelo de predicción ajustado por edad, sexo, SOFA, APPS, shock, Indice de Charlson (ICh), se comportan como factores asociados a mortalidad el APPS, el sexo masculino (RPa: 1,48; IC 95% 1,09 a 2,049; p < 0,05) y el ICh (RPa: 1,11; IC 95% 1,02 a 1,21; p < 0,05). CONCLUSIÓN: El APPS, el sexo masculino y el ICh son predictores de mortalidad en SDRA. por COVID-19 grave.

BACKGROUND: Mortality in patients with severe COVID-19 who developed severe pneumonia and severe Acute Respiratory Distress Syndrome (ARDS) has been significant despite timely treatment. It is important to determine early predictors of disease that help us to stratify those patients with a higher risk of death. It is intended to study the behavior of the APPS score as a predictor of this, based on some reports of use and usefulness in non-COVID-19 ARDS. AIM: To determine if the APP score is useful as a predictor of mortality in ARDS due to severe COVID-19. METHOD: A retrospective cohort study was carried out, including patients from the Intensive Care Unit (ICU) with ARDS due to severe COVID-19 who were admitted to the ICU of the Trujillo Regional Teaching Hospital (HRDT) in the period March 2020 to March 2021. The usefulness of the APP score as a predictor of mortality in mentioned population was evaluated. RESULTS: The APP score proved to be a factor associated with mortality in patients with ARDS and severe COVID-19 (APR 1.34; 95% CI 1.16 to 1.56; p < 0.001). We also found that when performing a prediction model adjusted for age, sex, SOFA, APP score, shock and Charlson Index (ICh) we found that the APP score, male sex (APR: 1.48; 95% CI 1.09 to 2.049; p < 0.05) and the ICh behave as factors associated with mortality (RPa: 1.11; 95% CI 1.02 to 1.21; p < 0.05). CONCLUSION: The APP score, male sex, and ICh are predictors of mortality in ARDS due to severe COVID-19.

Inmunoanálisis quimioluminiscente de micropartículas (CMIA) en el diagnóstico de sífilis: caracterización y valorización / Chemioluminescent microparticle immunoanalysis (CMIA) in the diagnosis of syphilis: characterization and assessment

INTRODUCCIÓN: La inmunoquimioluminiscencia de micropartículas (CMIA), no es recomendada en el día de hoy para el tamizaje ni confirmación de sífilis en pacientes, las guías chilenas recomiendan tamizaje con V.D.R.L y confirmación con hemaglutinación. OBJETIVO: Determinar la especificidad, sensibilidad y correlación diagnóstica de esta técnica respecto a la prueba treponémica de uso habitual. MATERIALES Y MÉTODOS: De 815 muestras obtenidas en un periodo de 6 meses, a todas las cuales se les aplicó las pruebas de VDRL, MHA-TP y CMIA, 484 muestras fueron positivas para MHA-TP. Se determinó el rendimiento, se graficaron las curvas ROC, índice de correlación y punto de corte óptimo. RESULTADOS: La CMIA. demostró una sensibilidad de 100%, especificidad: 94,6%, VPN: 100% y VPP: 96.4% y una eficiencia de 97,8% con respecto al MHA-TP, con un índice de correlación: 0,97 y un punto de corte de 7.665, de modo que toda muestra con una CMIA. sobre este valor no necesitaría de una segunda prueba treponémica para su confirmación. El 7,11% tuvo valores intermedios de CMIA (1.0 a 7.664). CONCLUSIÓN: La CMIA. es una técnica automatizada altamente sensible y específica, equiparable al MHA-TP. Aplicada como prueba inicial de testeo para sífilis incrementa la certeza diagnóstica y podría permitir el diagnóstico precoz de la enfermedad.

BACKGROUND: The chemiluminescent microparticle immunoassay (CMIA) is not recommended for screening or confirmation of syphilis in patients, Chilean guidelines recommend screening with VDRL and confirmation with hemagglutination. AIM: To determine the specificity, sensitivity, and diagnostic correlation of this technique compared to the usual treponemal test. METHODS: Of the 815 samples obtained over a period of 6 months, all of which were subjected to VDRL, MHATP, and CMIA. testing, 484 samples were positive for MHA-TP. The performance was determined, ROC curves were graphed, correlation index and optimal cutoff point were determined. RESULTS: CMIA showed a sensitivity of 100%, specificity of 94.6%, NPV of 100%, PPV of 96.4%, and an efficiency of 97.8% compared to MHA-TP, with a correlation index of 0.97 and a cutoff point of 7.665, such that any sample with a CMIA. value above this value would not require a second treponemal test for confirmation. 7.11% had intermediate CMIA. values (1.0 to 7.664). CONCLUSION: CMIA. is a highly sensitive and specific automated technique comparable to MHA-TP. When applied as an initial screening test for syphilis, it increases diagnostic certainty and may allow for early diagnosis of the disease.

Las ecuaciones predictoras de frecuencia cardiaca máxima no superan prueba clave de validación externa / Maximum heart rate prediction equations fail key external validation test / Equações de predição da frequência cardíaca máxima não superam teste-chave de validação externa

Resumen Las ecuaciones de frecuencia cardiaca máxima (FCmax) se han utilizado por su fácil obtención y practicidad, en comparación con las pruebas de esfuerzo. Sin embargo, la ecuación más conocida "220 − edad" presenta baja fiabilidad y desviaciones de hasta 12 lat/min. Se han planteado nuevas fórmulas, pero estas no han sido correctamente validadas. El propósito de este estudio fue validar 7 ecuaciones de predicción utilizando una base de datos independiente. Se utiliza una base con datos de 634 sujetos (474 hombres y 160 mujeres) de 18-85 años, que fueron obtenidos como parte de un servicio de salud desarrollado en la Universidad de Michigan entre 1990-1992. Los sujetos realizaron una prueba de vO2max en banda sin fin, siguiendo un protocolo libre. Se utilizó la técnica de regresión lineal, en la que las ecuaciones adecuadas fueron aquellas que cumplieron con las dos hipótesis: pendiente = 1 y constante = 0. De acuerdo con los resultados, ninguna de las ecuaciones analizadas para toda la muestra aceptó ambas hipótesis. Al realizar el análisis de acuerdo con el sexo, seis de las ecuaciones cumplieron con las dos hipótesis para las mujeres, pero ninguna para los hombres; y, cuando se realizó de acuerdo con el grupo de edad, 4 de las ecuaciones cumplieron las hipótesis para el grupo de personas de 40 años o menos, pero no para el grupo de mayores de 40 años. La FCmax parece ser difícil de predecir por una única ecuación, por lo que se recomienda que, cuando se necesite una medida válida de esta variable, se recurra a una prueba directa.

Abstract Maximum heart rate equations (HRmax) have been used due to their easy availability and practicality, as compared to stress tests. However, the best-known equation, "220 - age", shows low reliability and deviations of up to 12 beats/min. New formulae have been proposed, but they have not been correctly validated. The purpose of this study was to validate 7 prediction equations by using and independent data base. A data base of 634 subjects (474 men and 160 women) from 18-85 years of age, obtained within a health service developed at the University of Michigan from 1990-1992, has been used. The subjects performed a vO2max test in a treadmill, following a free protocol. A linear regression technique was used in which the appropriate equations were those that met the two hypotheses: slope = 1 and constant = 0. According to the results, none of the equations analyzed for the full sample accepted both hypotheses. When doing the analysis by sex, six of the equations met the two hypotheses for the women, but none of them for the men; and when the analysis was done by age group, 4 of the equations met the hypotheses for the group 40 years old or younger, but not for those above 40. The HRmax seems to be difficult to predict through a single equation. Therefore, it is recommended that, when a valid measure for this variable is needed, a stress test be used.

Resumo As equações de predição da frequência cardíaca máxima (FCmax) têm sido utilizadas devido à sua facilidade de obtenção e praticidade, quando comparadas aos testes de esforço. No entanto, a equação mais conhecida "220 − idade" apresenta baixa confiabilidade e desvios de até 12 batimentos/min. Foram propostas novas fórmulas, entretanto não foram devidamente validadas. O objetivo deste estudo foi validar 7 equações de predição usando um banco de dados independente. Utiliza-se um banco de dados de 634 indivíduos (474 homens e 160 mulheres) com idades entre 18 e 85 anos, obtidos como parte de um serviço de saúde desenvolvido na Universidade de Michigan entre 1990-1992. Os sujeitos realizaram um teste de vO2máx em uma esteira, seguindo um protocolo livre. Utilizou-se a técnica de regressão linear, na qual as equações apropriadas foram aquelas que preencheram as duas hipóteses: inclinação = 1 e constante = 0. De acordo com os resultados, nenhuma das equações analisadas para toda a amostra aceitou ambas as hipóteses. Ao realizar a análise por sexo, seis das equações atenderam às duas hipóteses para as mulheres, mas nenhuma para os homens; e, quando realizadas de acordo com a faixa etária, 4 das equações atenderam às hipóteses para o grupo de pessoas com 40 anos ou menos, mas não para o grupo de pessoas com mais de 40 anos. A FCmax parece ser difícil de prever por uma única equação, por isso recomenda-se que, quando uma medida válida dessa variável for necessária, seja utilizado um teste direto.

Social skills, behavioral problems, and academic competence of students with intellectual disabilities / Habilidades sociais, problemas de comportamento e competência acadêmica de alunos com deficiência intelectual / Habilidades sociales, problemas de conducta y competencia académica de estudiantes con discapacidad intelectual

This study had as general objective to characterize and associate social skills, behavior problems, and academic competence of students with intellectual disabilities in school inclusion and; as specific objectives to verify predictive values for social skills and differences between groups diagnosed with intellectual disability and other associated diagnoses. This was a quantitative, cross-sectional, descriptive, correlational, predictive, and comparative study. Forty-four students with intellectual disability participated (11 of them presented other associated diagnoses), who were evaluated by 42 guardians and 34 teachers. The instruments used were Social Skills Rating System (SSRS-BR) and the Parental Educative Social Skills Interview Script (RE-HSE-P). The evaluation from guardians and teachers were different. Social skills were negatively associated with behavior problems and positively associated with academic competence; behavior problems and diagnosis were negative predictors to social skills. There were significant differences in the groups. The results highlight the importance of intervention programs to develop social skills.(AU)

O estudo teve como objetivo geral caracterizar e associar habilidades sociais, problemas de comportamento e competência acadêmica de alunos com deficiência intelectual em inclusão educacional e; como objetivos específicos verificar valores preditivos para habilidades sociais e diferenças entre grupos com diagnóstico de deficiência intelectual somente e com outros diagnósticos associados. Trata-se de um estudo quantitativo, transversal, descritivo, correlacional, preditivo e comparativo. Participaram 44 alunos com deficiência (11 apresentavam outros diagnósticos associados), que foram avaliados por 42 responsáveis e 34 professoras. Os instrumentos utilizados foram Social Skills Rating System (SSRS-BR) e Roteiro de Entrevista de Habilidades Sociais Educativas Parentais (RE-HSE-P). A avaliação de responsáveis e professores foi diferente. Habilidades sociais foram negativamente associadas aos problemas de comportamento e positivamente associadas a competência acadêmica; problemas de comportamento e diagnósticos associados foram preditores negativos de habilidades sociais. Houve diferença significativa entre grupos. Resultados evidenciam a importância de programas para promoção de habilidades sociais.(AU)

Este estudio tuvo como objetivo general caracterizar y asociar las habilidades sociales, los problemas de conducta y la competencia académica de estudiantes con discapacidad intelectual en la inclusión escolar; y como objetivos específicos verificar los valores predictivos de las habilidades sociales y las diferencias entre grupos diagnosticados con discapacidad intelectual y otros diagnósticos asociados. Se trató de un estudio cuantitativo, transversal, descriptivo, correlacional, predictivo y comparativo. Participaron 44 estudiantes con discapacidad intelectual (11 de ellos presentaban otros diagnósticos asociados), quienes fueron evaluados por 42 tutores y 34 docentes. Los instrumentos utilizados fueron el Sistema de Evaluación de Habilidades Sociales (SSRS-BR) y el Guion de Entrevista de Habilidades Sociales para Educación de los Padres (RE-HSE-P). Las evaluaciones de los tutores y docentes fueron diferentes. Las habilidades sociales se asociaron negativamente con problemas de conducta y positivamente con la competencia académica; los problemas de conducta y el diagnóstico fueron predictores negativos de las habilidades sociales. Hubo diferencias significativas entre los grupos. Los resultados destacan la importancia de los programas de intervención para desarrollar habilidades sociales con la población estudiada.(AU)

The Anterior Pelvic Index (API) in the Classification of the Female Pelvis and Prediction of Fetopelvic Disproportion / El Índice Pelviano Anterior (API) en la Clasificación de la Pelvis Femenina y Predicción de la Desproporción Fetopélvica

SUMMARY: Measurements of the upper strait of the pelvis can be calculated using the Anterior Pelvic Index. The objective of the study was to determine the external validity and cut-off point of the API, to classify narrow pelvises from normal ones. We selected 214 women from 15 to 55 years old, 171 had vaginal delivery and 43 by caesarean section by feto-pelvic disproportion (FPD) of maternal origin, in whom the API was calculated, of which its mean difference was established with an alpha error of <0.05. Maximum values of sensitivity and specificity, ROC curve and Youden index were determined. The student's t gave a p-value =0.000 of the mean difference between the women who had vaginal delivery and those who had cesarean section by FPD of maternal origin; the value of the area under the ROC curve was 0.758 (CI 95% 0.695 - 0.814) with a p-value=0.0001. Maximum sensitivity was 74.42 % (CI 95%: 58.8 % to 86.5 %) and maximum specificity was 73.10 % (CI 95%: 65.8 % to 79.6 %), produced a Youden index of 0.475 (CI 95% 0.283 - 0.590) which is associated with the 15.44 (CI 95% 14.19 - 15.83) of the API scale. The API is a good tool for predicting women with suspected narrow pelvis and allows its classification into three types of pelvises: an API value of more than 15.83 would indicate pelvis suitable for vaginal delivery; an API value between 14.19 and 15.83 would be suspected of pelvic narrowness; an API value less than 14.19 would confirm a narrow pelvis.

Las medidas del estrecho superior de la pelvis pueden calcularse mediante el Índice Pelviano Anterior. El objetivo del estudio fue determinar la validez externa y el punto de corte del API, para clasificar pelvis estrechas de las normales. Seleccionamos 214 mujeres de 15 a 55 años, 171 tuvieron parto vaginal y 43 mediante cesárea por DFP de origen materno, en quienes se calculó el API, del cual se estableció su diferencia de medias con un error alfa de <0,05. Se determinaron valores máximos de sensibilidad y especificidad, curva ROC e índice de Youden. La t de Student dio un p-valor=0,000 de la diferencia de medias entre las mujeres de tuvieron parto vaginal y las que fueron sometidas a cesárea por DFP de origen materno; el valor del área bajo la curva ROC fue 0,758 (IC 95% 0,695 - 0,814) con un p- valor=0,0001. La máxima sensibilidad (74,42 %. IC 95%: 58,8 % a 86,5 %) y máxima especificidad (73,10 %. IC 95%: 65,8 % a 79,6 %), produjeron un índice de Youden de 0,475 (IC 95% 0,283 - 0,590) el cual está asociado al valor 15,44 (IC 95% 14,19 - 15,83) de la escala del API. El API es una buena herramienta de predicción de mujeres con sospecha de pelvis estrecha y permite su clasificación en tres tipos de pelvis: un valor de API de mas de 15,83 indicaría pelvis aptas para un parto vaginal; un valor de API entre 14,19 y 15,83 se sospecharía de estrechez pélvica; un valor de API menor a 14,19 confirmaría una pelvis estrecha.

Empirical antimicrobial therapy based on active surveillance cultures in ICU patients

Objetivo: Avaliar o valor preditivo da colonização prévia por Acinetobacter baumannii (CRAB) e Pseudomonas aeruginosa (CRPA) resistente a carbapenêmicos estabelecida em culturas de vigilância para infecção subsequente por esses patógenos em pacientes internados em UTI. Métodos: Foi realizado um estudo de coorte com pacientes internados na unidade de terapia intensiva por pelo menos 48 h. Foram medidos os valores preditivos negativos e positivos, sensibilidade e especificidade das culturas de vigilância em CRAB e CRPA. Resultados: Foram incluídos 693 pacientes infectados. Pacientes previamente colonizados por CRAB e CRPA tiveram maior probabilidade de serem infectados por esses patógenos: OR ajustado: 10,34 (6,58 - 16,45; p < 0,001) e 2,30 (3,88 - 10,26; p < 0,001), respectivamente. Encontramos altos valores preditivos negativos de culturas de vigilância para CRAB (87,18%) e CRPA (88,30%) e alta especificidade 91,96% e 90,13%, respectivamente. Conclusões: Pacientes não colonizados por CRAB e CRPA mostraram-se menos propensos à infecção por esses patógenos. Esses achados podem contribuir para a escolha da terapia antimicrobiana empírica e desencorajar a prescrição de antibióticos contra esses patógenos em pacientes sem colonização prévia.

Objective: To assess the predictive value of prior carbapenem-resistant Acinetobacter baumannii (CRAB) and Pseudomonas aeruginosa (CRPA) colonization established in surveillance cultures for subsequent infection by these pathogens in ICU patients. Methods: A cohort study was performed with patients admitted to the intensive care unit for at least 48 h. Negative and positive predictive values, sensitivity, and specificity of surveillance cultures in CRAB and CRPA were measured. Results: 693 infected patients were included. Patients previously colonized by CRAB and CRPA were more likely to be infected by these pathogens: adjusted OR: 10.34 (6.58 - 16.45; p < 0.001) and 2.30 (3.88 - 10.26; p < 0.001), respectively. We found high negative predictive values of surveillance cultures for CRAB (87.18%) and CRPA (88.30%) and high specificity 91.96% and 90.13%, respectively. Conclusions: Patients not colonized by CRAB and CRPA were less prone to infection by these pathogens. These findings may contribute to the choice of empirical antimicrobial therapy and discourage the prescription of antibiotics against these pathogens in patients without previous colonization.

Índice de irresecabilidad asociado a citorreducción óptima en pacientes con cáncer de ovario: Estudio observacional de centro único / Unresectability index associated with optimal cy-toreduction in patients with ovarian cancer: A single-center observational study

Introducción: El índice de irresecabilidad valora la presencia de cuatro variables (masa abdominal palpable, tumor en fondo de saco de Douglas, presencia de líquido ascítico, valor preoperatorio de Ca 125 mayor a 1000 U/ml); previo a la realización de una cirugía citorreductora primaria en pacientes con cáncer de ovario. El objetivo del presente estudio fue realizar una prueba diagnóstica del índice de irresecabilidad con la decisión de realizar citorreducción óptima en pacientes con cáncer de ovario que fueron operadas en un hospital público de referencia nacional en Ecuador en 3 años de estudio. Metodología: En el presente estudio de pruebas diagnósticas, se estudiaron mujeres operadas con cáncer de ovario, en el Hospital de Especialidades Eugenio Espejo (Ecuador) de septiembre del 2016 a septiembre del 2018. Se incluyeron pacientes con citorreducción óptima y subóptima. Se presenta un análisis descriptivo con frecuencias, porcentajes y promedios. Se evaluó la sensibilidad, especificidad, valor predictivo negativo (VPN) y valor predictivo positivo (VPP) del índice de irresecabilidad comparado con la citorreducción. Resultados: Fueron 148 casos analizados. La especificidad del índice fue de 81 %, con un valor predictivo (VP) positivo del 77 % y VP negativo de 68 %. La sensibilidad de la ascitis 85 % y la masa abdominal palpable del 79 %. En las pacientes que presentaron valores de antígeno CA-125 menor a 1000 U/ml, el riesgo de obtener una citorreducción óptima fue OR: 0.15 (IC95% 0.069 ­ 0.307; P: 0.0001); las pacientes que presentaron valores del índice de irresecabilidad entre 1 y 2 puntos versus 3 y 4 fue de OR: 7.04 (IC95% 3.33 -14.87, P: 0.0001). Conclusiones: El Índice de irresecabilidad presentó una capacidad estadísticamente significativa para predecir citorreducción óptima en las pacientes con cáncer ovario operadas en el Hospital de Especialidades Eugenio Espejo.

Introduction: The unresectability index assesses the presence of four variables (palpable abdominal mass, tumor in the fornix of Douglas, presence of ascitic fluid, preoperative Ca 125 value greater than 1000 U/ml); before performing primary cytoreductive surgery in patients with ovarian cancer. The objective of this study was to carry out a diagnostic test of the unresectability index with the decision to perform optimal cytoreduction in patients with ovarian cancer who underwent surgery in a public hospital of national reference in Ecuador in 3 years of study. Methodology: In the present study of diagnostic tests, women operated on for ovarian cancer were studied at the Eugenio Espejo Specialties Hospital (Ecuador) from September 2016 to September 2018. Patients with optimal and suboptimal cytoreduction were included. A descriptive analysis with frequencies, percentages, and averages is presented. The sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of the unresectable index compared with cytoreduction were evaluated. Results: 148 cases were analyzed. The specificity of the index was 81%, with a positive predictive value (PV) of 77% and a negative PV of 68%. The sensitivity of ascites is 85%, and the palpable abdominal mass of 79%. In patients who presented CA-125 antigen values less than 1000 U/ml, the risk of obtaining optimal cytoreduction was OR: 0.15 (95% CI 0.069 - 0.307; P: 0.0001); The patients who presented unresectability index values between 1 and 2 points versus 3 and 4 were OR: 7.04 (95% CI 3.33 -14.87, P: 0.0001). Conclusions: The unresectability index presented a statistically significant capacity to predict optimal cytoreduction in patients with ovarian cancer operated on at the Eugenio Espejo Specialties Hospital.

Validación de técnica de ganglio centinela en cáncer de endometrio en el Hospital de Talca / Validation of sentinel lymph node technique in endometrial cancer at the Hospital de Talca

Objetivo: Validar la técnica de ganglio centinela utilizando verde de indocianina en la estadificación del cáncer de endometrio. Método: Realizamos un estudio prospectivo entre enero y diciembre de 2021. Se incluyeron todas las pacientes portadoras de cáncer de endometrio clínicamente en etapa 1, de todos los grados de diferenciación e histologías. Todas las pacientes fueron sometidas a una estadificación laparoscópica. Se inició el procedimiento con identificación de ganglio centinela utilizando verde de indocianina. Posteriormente, se completó la cirugía de estadiaje estándar en todas las pacientes. Los ganglios centinelas fueron procesados con técnica de ultraestadiaje. Resultados: Se incluyeron 33 pacientes. El 81% presentaron histología endometrioide. El 100% fueron sometida además a una linfadenectomía pelviana estándar y el 20% a una linfadenectomía paraaórtica simultáneamente. Se detectó al menos un ganglio centinela en el 100% de los casos. La detección bilateral ocurrió en el 90,9%. La localización más frecuente fue la fosa obturatriz y la arteria hipogástrica. Obtuvimos una sensibilidad del 90% para detectar enfermedad ganglionar y un valor predictivo negativo del 95,8%. Conclusiones: La técnica de ganglio centinela utilizando verde de indocianina es replicable. Los resultados de nuestra serie nos permiten realizar procedimientos menos agresivos al estadificar el cáncer de endometrio.

Objective: To validate sentinel node mapping using indocyanine green in endometrial cancer staging. Method: A prospective study was conducted between January and December 2021. All patients with clinically stage 1 endometrial cancer, of all grades and histologies were included. All patients underwent laparoscopic staging. The procedure began with identification of the sentinel node using indocyanine green. Subsequently, standard staging surgery was completed in all patients. Sentinel nodes were processed using ultrastaging technique. Results: Thirty-three patients were enrolled. 81% of cases had endometrioid histology. All patients also underwent a standard pelvic lymphadenectomy and in 20% of cases a para-aortic lymphadenectomy. At least one sentinel node was detected in 100% of the cases. Bilateral detection occurred in 90.9%. The most frequent location was obturator fossa and hypogastric artery. Sensitivity to detect lymph node disease was 90% and negative predictive value 95.8%. Conclusions: Sentinel lymph node mapping using indocyanine green is a replicable technique. Our results allows us to perform less aggressive procedures in endometrial cancer staging.

Validación de la reacción de polimerasa en cadena en tiempo real como herramienta diagnóstica en la aspergilosis asociada a COVID-19 en pacientes hospitalizados en Clínica Dávila de Santiago, Chile, durante los años 2020 y 2021 / Validation of real-time PCR as a diagnostic tool in aspergillosis associated with COVID-19 in patients hospitalized at Clínica Dávila at Santiago, Chile, during the years 2020 and 2021

INTRODUCCIÓN: Desde el inicio de la pandemia por COVID-19 se han registrado casos de infecciones de aspergilosis pulmonar asociada a esta infección, la cual tiene características diferentes a la aspergilosis pulmonar clásica y, por lo tanto, han significado un desafío diagnóstico. OBJETIVO: Validar una reacción de polimerasa en cadena (RPC) en tiempo real (sigla en inglés RT-PCR) comercial, como herramienta diagnóstica alternativa a la técnica de galactomanano (GM) en el diagnóstico de aspergilosis pulmonar asociada a COVID-19 (sigla en inglés CAPA). PACIENTES Y MÉTODO: Se analizaron resultados de RT-PCR de Aspergillus spp y GM en lavado bronco-alveolar (LBA) de 72 pacientes, hospitalizados por COVID-19 de Clínica Dávila entre los años 2020 y 2021. De estos pacientes, 33 presentaron CAPA. RESULTADOS: La RT-PCR de Aspergillus y GM presentaron una correlación positiva (r = 0,6351, valor p < 0,0001). La técnica de RT-PCR presentó una sensibilidad (S), especificidad (E), valor predictor positivo (VPP) y valor predictor negativo (VPN) de 100, 44, 66 y 100%, respectivamente, mientras que en GM fueron de 64, 89, 84 y 73%, respectivamente para LBA. Al utilizar ambas técnicas en combinación se obtuvo una S, E, VPP y VPN de 100, 82, 88 y 100%, respectivamente. CONCLUSIÓN: Este estudio concluyó que usar una técnica de RT-PCR de Aspergillus y GM en conjunto en LBA mejoraron los parámetros de desempeño de ambas técnicas usadas de manera individual para diagnosticar CAPA. Se requieren más estudios para evaluar el desempeño de técnicas combinadas en otros tipos de aspergilosis.

BACKGROUND: Since the beginning of the COVID-19 pandemic, there have been cases of pulmonary aspergillosis infections associated with this infection, which has different characteristics from classical pulmonary aspergillosis and therefore, have been diagnostic challenges. AIM: To validate a commercial real-time PCR (RT-PCR) method as an alternative diagnostic tool to the galactomannan (GM) technique in the diagnosis of COVID-19-associated pulmonary aspergillosis (CAPA). METHODS: Results of RT-PCR of Aspergillus spp and GM in broncho-alveolar lavage (BAL) of 72 patients hospitalized for COVID-19 at Clínica Dávila between 2020 and 2021 were analyzed. Of these patients, 33 presented CAPA. RESULTS: The RT-PCR for Aspergillus and GM showed a positive correlation (r = 0.6351, p-value < 0.0001). The RT-PCR for Aspergillus technique presented a sensitivity (S), specificity (S), positive predictive value (PPV) and negative predictive value (NPV) of 100, 44, 66 and 100% respectively, while the GM technique presented 64, 89, 84 and 73%, respectively for BAL. Using both techniques in combination a S, E, PPV and NPV of 100, 82, 88 and 100% were obtained respectively. CONCLUSION: This study concluded that using RT-PCR and GM techniques in combination in BAL improved the performance parameters of both techniques from those used individually to diagnose CAPA. Further studies are required to evaluate the performance of combined techniques in other aspergillosis focus.

Genotipificación del gen RHD en ADN fetal libre en plasma de embarazadas RhD negativo / Genotyping of the RHD gene in free fetal DNA in plasma of RhD negative pregnant women

Objetivo: Determinar el grupo RhD fetal a través del estudio del gen RHD en ADN fetal que se encuentra libre en plasma de embarazadas RhD negativo. Método: Se analizó la presencia de los genes RHD, SRY y BGLO en ADNfl obtenido de plasma de 51 embarazadas RhD negativo no sensibilizadas, utilizando una qPCR. Los resultados del estudio genético del gen RHD se compararon con el estudio del grupo sanguíneo RhD realizado por método serológico en muestras de sangre de cordón, y los resultados del estudio del gen SRY fueron cotejados con el sexo fetal determinado por ecografía. Se calcularon la sensibilidad, la especificidad, los valores predictivos y la capacidad discriminativa del método estandarizado. Resultados: El gen RHD estaba presente en el 72,5% de las muestras y el gen SRY en el 55,5%, coincidiendo en un 100% con los resultados del grupo RhD detectado en sangre de cordón y con el sexo fetal confirmado por ecografía, respectivamente. Conclusiones: Fue posible deducir el grupo sanguíneo RhD del feto mediante el estudio del ADN fetal que se encuentra libre en el plasma de embarazadas con un método molecular no invasivo desarrollado y validado para este fin. Este test no invasivo puede ser utilizado para tomar la decisión de administrar inmunoglobulina anti-D solo a embarazadas RhD negativo que portan un feto RhD positivo.

Objective: To determine the fetal RhD group through the study of the RHD gene in fetal DNA found free in plasma of RhD negative pregnant women. Method: The presence of the RHD, SRY and BGLO genes in fetal DNA obtained from plasma of 51 non-sensitized RhD negative pregnant women was analyzed using qPCR. The results of the genetic study of the RHD gene were compared with the RhD blood group study performed by serological method in cord blood samples, and the results of the SRY gene study were compared with the fetal sex determined by ultrasound. Sensitivity, specificity, predictive values and discriminative capacity of the standardized method were calculated. Results: The RHD gene was present in 72.5% of the samples and the SRY gene in 55.5%, coinciding 100% with the results of the RhD group detected in cord blood, and with the fetal sex confirmed by ultrasound, respectively. Conclusions: It was possible to deduce the RhD blood group of the fetus through the study of fetal DNA found free in the plasma of pregnant women with a non-invasive molecular method developed and validated for this purpose. This non-invasive test can be used to make the decision to administer anti-D immunoglobulin only to RhD-negative pregnant women carrying an RhD-positive fetus.

Determinación de valores de corte de 17 hidroxiprogesterona ajustados por edad gestacional para la pesquisa neonatal de la hiperplasia suprarrenal congénita / Assessment of gestational age-adjusted 17-hydroxyprogesterone cut-off values for neonatal screening of congenital adrenal hyperplasia

La pesquisa neonatal de hiperplasia suprarrenal congénita se realiza mediante la determinación de 17 hidroxiprogesterona (17OHP) en gotas de sangre seca en papel de filtro. Los bebés prematuros presentan valores más elevados que los bebés de término, siendo de utilidad contar con límites de corte apropiados. Nuestro objetivo fue actualizar los valores de corte de 17OHP ajustados por edad gestacional para la metodología en uso a nivel nacional por las jurisdicciones asistidas por el "Programa Nacional de Fortalecimiento de la Detección Precoz de Enfermedades Congénitas". La 17OHP se determinó utilizando el kit comercial de enzimo-inmunoanálisis (ELISA competitivo), Elizen Neonatal 17OHP Screening (Zentech, Bélgica). Se obtuvieron límites de corte utilizando percentiles de la distribución de los valores de 17OHP para cada edad gestacional. La sensibilidad obtenida fue 100%, especificidad 98,76 %, tasa de falsos positivos 1,24 % y el valor predictivo positivo 1,12 %. Destacamos la importancia de disponer de límites de corte adecuados a la población. La armonización de los mismos permitirá resultados comparables entre los programas regionales de pesquisa neonatal (AU)

Newborn screening for congenital adrenal hyperplasia is performed by the measurement of 17-hydroxyprogesterone (17OHP) in dried blood spots on filter paper. Premature infants have higher values than full-term infants, and appropriate cutoff values are useful. Our aim was to update the cut-off values of 17OHP adjusted for gestational age for the methodology used at a national level in regions assisted by the "National Program for Strengthening the Early Detection of Congenital Diseases". 17OHP was determined using the commercial enzyme-linked immunosorbent assay (competitive ELISA) kit, Elizen Newborn 17OHP Screening (Zentech, Belgium). Cut-off values were obtained using percentiles of the distribution of 17OHP values for each gestational age. Sensitivity was 100%, specificity 98.76%, false positive rate 1.24%, and positive predictive value 1.12%. It is important to have cut-off values that are adjusted to the population. Harmonization will allow for the comparison of results among regional newborn screening programs (AU)

Utilidad de la proteína C-reactiva para determinar la gravedad de infección por SARS-CoV-2 en Perú / Usefulness of C-reactive protein to determine the severity of SARS-CoV-2 infection in Peru

INTRODUCCIÓN: En los últimos años se han estudiado diversos biomarcadores para determinar los casos graves de COVID-19. La proteína C-reactiva (PCR) ha mostrado alta sensibilidad en la identificación de pacientes con enfermedad grave y utilidad comparable a la tomografía. OBJETIVO: Determinar la utilidad de la PCR para predecir gravedad de la infección por SARS-CoV-2 en pacientes hospitalizados en el Centro Médico Naval del Perú durante el periodo enero-septiembre del año 2021. MÉTODOS: Se empleó un diseño de tipo cuantitativo, observacional, analítico, retrospectivo, y de tipo prueba diagnóstica. Se calculó un tamaño muestral de 503 pacientes, quienes fueron divididos en dos grupos de acuerdo a su gravedad. RESULTADOS: Se determinó un punto de corte óptimo de 10,92 mg/L de los valores de PCR para el diagnóstico de enfermedad grave por COVID-19. Se calculó un área bajo la curva (AUC) de 0,762 y se obtuvieron valores de sensibilidad, especificidad, valores predictores positivo, negativo y precisión diagnóstica de 78,88%, 66,4%; 41,42%; 87,01%; y 67,27%, respectivamente. El normograma de Fagan mostró una probabilidad posprueba de 41%. En el modelo ajustado fueron significativas la PCR (ORa = 4,853; IC95% 2,987-7,886; p = 0,001), además de la ferritina (ORa = 1,001; IC 95%: 1,001-1,002; p = 0,001) e hipotiroidismo (OR ajustado = 4,899; IC 95%: 1,272-18,872; p = 0,021). CONCLUSIONES: El presente estudio mostró la asociación entre la PCR y la gravedad de infección por SARS-CoV-2 en un modelo ajustado, mostrando su potencial utilidad y contribuyendo a determinar el punto de corte de la PCR en población peruana y su comparación a nivel internacional.

BACKGROUND: Recently, many biomarkers have been studied to determine severe cases of COVID-19. C-reactive protein (CRP) has shown high sensitivity in identifying patients with severe disease and utility comparable to computed tomography. AIM: To determine the usefulness of CRP to predict the severity of SARS-CoV-2 infection in patients hospitalized at the Naval Medical Center of Peru during the period January-September in the year 2021. METHODS: A quantitative, observational, analytical, retrospective, and diagnostic test type design was used. A sample size of 503 patients was calculated, which were divided into two groups according to their severity. RESULTS: An optimal cut-off point of 10.92 mg/L for CRP levels was determined for the diagnosis of severe COVID-19. An area under the curve (AUC) of 0.762 was calculated and sensitivity, specificity, positive and negative predictive values and diagnostic accuracy values of 78.88%, 66.4%; 41.42%; 87.01%; and 67.27%; respectively. Fagan's normogram showed a post-test probability of 41%. In the adjusted model, CRP (aOR = 4.853; 95% CI 2.987-7.886; p = 0.001), ferritin (aOR = 1.001; 95% CI: 1.001-1.002; p = 0.001) and hypothyroidism (adjusted OR = 4899; 95% CI: 1272-18872; p = 0.021) showed significance. CONCLUSIONS: The present study showed an association between CRP and the severity of SARS-CoV-2 infection in an adjusted model, showing its potential utility and contributing to determine the cut-off point of CRP in the Peruvian population and its international comparison.

Blasting the myth of predictive INR changes related to plasma transfusion: an academic institution's experience

Abstract Introduction Plasma transfusion is a common therapeutic strategy used to lower international normalized ratio (INR) values in the non-emergent setting. However, due to lack of evidence of its efficacy, standardized guidelines for this practice have not been well established. Methods This retrospective observational cohort study analyzed 276 inpatient encounters that involved plasma transfusions focusing on change in INR values from pre- to post-transfusion, with respect to the following predictor variables: vitamin K co-administration, number of plasma units transfused, order indication and body mass index (BMI). Results The overall average change in the INR was 1.35. Patients who received vitamin K showed an average change of 2.51, while patients that did not receive vitamin K demonstrated an average change of 0.70. Increased numbers of plasma units transfused showed benefit up to three-unit orders. Greater decreases in the INR were observed for patients requiring plasma for anticoagulation reversal or active bleeding. There was no significant difference in the change in INR based on the BMI. By multivariate and regression analyses, the stepwise addition of each successive predictor variable demonstrated an increase in the shared variance in the outcome of the post-transfusion INR: the pre-transfusion INR and vitamin K co-administration alone was not significant (p= 0.45); the additional number of plasma units transfused was significant (R² = 0.13, p < 0.001), and; the subsequent additional plasma order indications (R² = 0.19, p < 0.001) and BMI (R² = 0.18, p < 0.001) were increasingly significant. Conclusion Taking into consideration the combination of multiple predictive factors may aid in a more efficient use of plasma products.

Comparación del desempeño de dos pruebas para la evaluación del neurodesarrollo infantil en un hospital pediátrico de la Ciudad Autónoma de Buenos Aires / Comparison of the performance of two tests for the assessment of child neurodevelopment in a children's hospital in the City of Buenos Aires

Introducción. La detección precoz de los trastornos del desarrollo permite aplicar acciones que mejoren su evolución y pronóstico. En nuestro país, la Prueba Nacional de Pesquisa (PRUNAPE) requiere de un profesional certificado. El Instrumento de Observación del Desarrollo Infantil (IODI) es una herramienta de vigilancia sistematizada del desarrollo que no requiere especialización para su aplicación. La utilización del IODI como herramienta de evaluación del neurodesarrollo sería de utilidad por su fácil aplicabilidad. Objetivo. Evaluar el desempeño del IODI como prueba de vigilancia de trastornos del desarrollo utilizando la PRUNAPE como patrón de oro. Población y métodos. Estudio prospectivo analítico de prueba diagnóstica. Se incluyeron de forma aleatoria pacientes de 1 mes a 4 años, cuyos padres dieron el consentimiento para participar. Se evaluó el desempeño del IODI usando la PRUNAPE como patrón de oro. Se estimaron los valores de clivaje de sensibilidad (S), especificidad (E), valores predictivos positivo y negativo (VPP y VPN), y las razones de verosimilitud positiva y negativa (RVP y RVN, respectivamente). Resultados. Se evaluaron 91 pacientes; 24 no pasaron la PRUNAPE, de los cuales 21 tampoco pasaron el IODI (sensibilidad: 87,5 %; especificidad: 79,1 %; valor predictivo positivo: 60,1 %; valor predictivo negativo: 94,6 %). Razón de verosimilitud positiva: 4,2; negativa: 0,2. Conclusión. El IODI mostró un desempeño aceptable como prueba de vigilancia de trastornos del desarrollo en comparación con la PRUNAPE.

Introduction. An early detection of developmental disorders allows to implement actions to improve their course and prognosis. In Argentina, the administration of the National Screening Test (Prueba Nacional de Pesquisa, PRUNAPE) requires a certified professional. The Child Development Observation Instrument (Instrumento de Observación del Desarrollo Infantil, IODI) is a systematized developmental surveillance tool that does not require specialization for its administration. The use of the IODI as a neurodevelopmental assessment tool would be useful because of its easy applicability. Objective. To assess the performance of the IODI as a surveillance test for developmental disorders using the PRUNAPE as a gold standard. Population and methods. Analytical, prospective study with a diagnostic test. Patients aged 1 month to 4 years, whose parents gave consent to participate, were included randomly. The IODI performance was assessed using the PRUNAPE as the gold standard. Sensitivity (S), specificity (Sp), positive and negative predictive values (PPV and NPV), and positive and negative likelihood ratios (PLR and NLR) were estimated. Results. Ninety-one patients were assessed; 24 failed the PRUNAPE, of these, 21 also failed the IODI (S: 87.5%, Sp: 79.1%, PPV: 60.1%, NPV: 94.6%). PLR: 4.2, NLR: 0.2. Conclusion. The IODI showed an acceptable performance as a developmental disorders surveillance test compared to the PRUNAPE.

El Estimador de Sensibilidad Insulínica de Punto Único (SPISE) supera a marcadores antropométricos de uso rutinario en la pesquisa de riesgo cardiometabólico asociado a obesidad: un estudio en adolescentes de la Región Metropolitana / The single Point Insulin Sensitivity Estimator (SPISE) outperforms routine anthropometric markers in the screening of obesity-related cardiometabolic risk: a study in adolescents from the Metropolitan Region

El Estimador de Sensibilidad a la Insulina de Punto Único (SPISE) es un biomarcador de sensibilidad a la insulina comparable al Índice de Matsuda. Se estima utilizando el IMC y los niveles de triglicéridos y HDL. El objetivo de este estudio fue comparar el rendimiento diagnóstico de SPISE con el de otros marcadores antropométricos de uso rutinario, como el IMC y la relación cintura | talla, en la pesquisa de insulinoresistencia (IR) y Síndrome Metabólico (MetS) en una muestra de 901 adolescentes de 11 a 16 años. En todos ellos se midió peso, talla, cintura, presión arterial, perfil lipídico, insulina y glicemia. La IR se diagnosticó con el HOMA-IR y el MetS con el criterio de Cook. Un zIMC ≥2.0 DE, un índice cintura/ talla ≥0.54 y un SPISE ≤ 5.4 fueron los puntos de corte utilizados para evaluar el rendimiento de estos marcadores en el diagnóstico de IR y MetS. No hubo diferencias por sexo en la prevalencia de obesidad, IR y MetS. Tanto en hombre como en mujeres, SPISE mostro una mejor capacidad para predecir el MetS (AUC: 0.95 y 0.89, respectivamente) e IR (AUC: 0.83 y 0.79, respectivamente) comparado con el rendimiento diagnóstico de la relación cintura | talla y el IMC-z. De igual manera, el SPISE mostro una mayor sensibilidad para identificar a los portadores de MetS e IR (96% y 75% en varones y 81% y 67% en mujeres, respectivamente). SPISE mostró una mejor capacidad para identificar el riesgo cardiometabólico asociado a la malnutrición por exceso al compararlo con otros indicadores de uso frecuente en clínica. Un índice de SPISE ≤5.4 fue un mejor predictor de MetS e IR que un IMC ≥2.0 DE y una relación cintura | talla ≥0.54.

The Single Point Insulin Sensitivity Estimator (SPISE) is a biomarker of insulin sensitivity comparable to the Matsuda Index. It is estimated using data on BMI, TG, and HDL. We aim to compare the diagnostic performance of SPISE with other routinely used anthropometric markers, such as BMI and waist-to-height ratio, in diagnosing insulin resistance (IR) and Metabolic Syndrome (MetS) in adolescents from 11 to 16 years. Weight, height, waist, blood pressure, lipid profile, insulin, and glycemia were measured. IR was diagnosed with the HOMA-IR and the MetS with the Cook criteria. A BMIz ≥2.0 SD, a waist-to-height ratio ≥0.54, and a SPISE ≤ 5.4 were the cut-off points used for diagnosing IR and MetS. There were no sex differences in the prevalence of obesity, IR, and MetS. In both males and females, SPISE showed a better ability to predict MetS (AUC: 0.95 and 0.89, respectively) and IR (AUC: 0.83 and 0.79, respectively) compared to the waist-to-height ratio and BMI-z. Similarly, SPISE showed greater sensitivity to identify adolescents with MetS and IR (96% and 75% in men and 81% and 67% in women, respectively) than the waist-to-height ratio and BMI-z. SPISE performed better in identifying obesity-related cardiometabolic risk than other frequently used clinical indicators. A SPISE index ≤5.4 was a better predictor of MetS and RI than a BMI ≥2.0 SD and a waist-to-height ratio ≥0.54.

Upper airway angle and glottic height: a prospective cohort to evaluate two new features for airway prediction

Abstract Background: Predicting difficult direct laryngoscopies remains challenging and improvements are needed in preoperative airway assessment. We conceived two new tests (the upper airway angle and the glottic height) and assessed their association with difficult direct laryngoscopies as well as their predictive performance. Methods: A prospective cohort was conducted with 211 patients undergoing general anesthesia for surgical procedures. We assessed the association between difficult laryngoscopies and modified Mallampati Test (MMT), Upper Lip Bite Test (ULBT), Mandibular Length (ML), Neck Circumference (NC), Mouth Opening (MO), Sternomental Distance (SMD), Thyromental Distance (TMD), Upper Airway Angle (UAA), and Glottic Height (GH). We also estimated their predictive values. Results: Difficult laryngoscopy was presented by 12 patients (5.7%). Six tests were significantly associated with difficult laryngoscopies and their area under the ROC curve, and 95% CIs were as follows: UAA = 88.82 (81.86-95.78); GH = 86.43 (72.67-100); ML = 83.75 (72.77-94.74); NC = 79.17 (64.98-93.36); MO = 65.58 (45.13-86.02); and MMT = 77.89 (68.37-87.41). Conclusion: We have found two new features (the UAA and the GH) to be significantly associated with the occurrence of difficult direct laryngoscopies. They also presented the best predictive performance amongst the nine evaluated tests in our cohort of patients. We cannot ensure, however, these tests to be superior to other regularly used bedside tests based on our estimated 95% CIs.

Detección rápida de antígenos de Streptococcus pyogenes en pacientes de 0 a 14 años asistidos en dos servicios de urgencia pediátrica (14/2/2018-13/4/2018) / Rapid detection of Streptococcus pyogenes' antigens in patients of 0 to 14 years of age, assisted in two pediatric emergency wards (2/14/2018-4/13/2018) / Detecção rápida de antígenos de Streptococcus pyogenes em pacientes de 0 a 14 anos de idade assistidos por emergência pediátrica (14/2/2018-13/4/2018)

Introducción: las infecciones estreptocócicas pueden presentarse con fiebre, inflamación faringoamigdalina con o sin exudados, petequias en el paladar, adenitis cervical, exantema escarlatiniforme y / o dolor abdominal. Resulta útil en área de urgencia disponer de pruebas de detección rápida de antígenos de S. pyogenes (DRASP) de alta especificidad y sensibilidad algo menor. Objetivos: conocer la utilidad de un test de DRASP en 2 servicios de Urgencia Pediátrica, describiendo las características clínicas y epidemiológicas de los pacientes estudiados durante el período de la investigación y su correlación con el cultivo de exudado faríngeo mediante el cálculo de sensibilidad (S), especificidad (E), valor predictivo positivo (VPP) y valor predictivo negativo (VPN). Material y métodos: estudio prospectivo, observacional, transversal en dos servicios de emergencia pediátrica. Se incluyeron niños a los que se les realizó DRASP y exudado faríngeo (EF) entre el 14 de febrero y el 13 de abril de 2018. Se registró: sexo, edad, motivo de consulta, diagnóstico, tratamiento, destino, resultado del test y de cultivo faríngeo. Se calcularon S, E, VPP y VPN. Resultados: n=241 niños. Rango 8 meses - 14 años, media 6 años. Consultaron por fiebre 103 niños (42,7%); por odinofagia 48, por erupción 11 y 47 por otros síntomas. Al 95% de los niños se le otorgó el alta. DRASP negativos 87,6% (N: 211) y positivos 12,9% (N: 31). EF negativos 80,1% (n: 193) y positivos para SßHGA en 13,7% (n: 33). La sensibilidad de la prueba fue del 52% y su especificidad del 93%. El VPP 55% y el negativo 92%. El diagnóstico más frecuente fue faringitis viral 132 (54,7%). Conclusiones: el test se aplicó fundamentalmente a escolares febriles, algunos con odinofagia. Contribuye a diferenciar en forma rápida la etiología y habilita a no usar antibióticos en caso de resultado negativo. Estos resultados avalan el uso de DRASP en la urgencia pediátrica.

Introduction: streptococcal infections can show fever, pharyngotonsillar inflammation with or without swabs, palatal petechiae, cervical adenitis, scarlatiniform rash and/or abdominal pain. Rapid detection tests for S. pyogenes antigens (DRASP) with high specificity and somewhat lower sensitivity are a useful at the Emergency Ward. Objectives: know the usefulness of a DRASP test in 2 Pediatric Emergency, describe the clinical and epidemiological characteristics of the patients studied during the research period and its correlation with the culture of pharyngeal exudates by calculating sensitivity (S) , specificity (S), positive predictive value (PPV), and negative predictive value (NPV). Material and Methods: prospective, observational, cross-sectional study carried out in two pediatric emergency wards. We included children who underwent DRASP and pharyngeal swab (PS) between February 14 and April 13, 2018. The following data were recorded: sex, age, reason for consultation, diagnosis, treatment, destination, test results and throat cultures. S, S, PPV and NPV were calculated. Results: n=241 children. Range 8 months - 14 years, average 6 years. 103 children (42.7%) consulted due to fever; 48 due to sore throat, 11 due to rash and 47 due to other symptoms. 95% of children were discharged. DRASP negative 87.6% (N: 211) and positive 12.9% (N: 31). Negative EP 80.1% (n: 193) and positive for SßHGA in 13.7% (n: 33). The test sensitivity was 52% and specificity 93%. The PPV 55% and the negative 92%. The most frequent diagnosis was viral pharyngitis 132 (54.7%). Conclusions: the test was applied mainly to febrile schoolchildren, some with odynophagia. A quick etiology differentiation is helpful, since it prevents antibiotics from being used in the event of a negative result. These results support the use of DRASP in pediatric emergency wards.

Introdução: as infecções estreptocócicas manifestam-se com febre, inflamação faringotonsilar com ou sem exsudado, petéquias palatinas, adenite cervical, erupção cutânea escarlatiniforme e/ou dor abdominal. Nos serviços de emergência é útil realizar testes de detecção rápida para antígenos de S. pyogenes (DRASP) com alta especificidade e sensibilidade um pouco mais baixa Objetivos: conhecer a utilidade do teste DRASP em 2 Emergências Pediátricas, descrever as características clínicas e epidemiológicas dos pacientes estudados durante o período da pesquisa e sua correlação com a cultura de exsudatos faríngeos por meio do cálculo de sensibilidade (S) , especificidade (S), positivo valor preditivo (VPP) e valor preditivo negativo (VPN). Material e métodos: estudo prospectivo, observacional, transversal, realizado em duas unidades de emergência pediátrica. Foram incluídas crianças que realizaram DRASP e swab faríngeo (PS) entre 14 de fevereiro e 13 de abril de 2018. Foram registrados os seguintes dados: sexo, idade, motivo da consulta, diagnóstico, tratamento, destino, resultados de exames e culturas de garganta. S, S, VPP e VPN foram calculados. Resultados: n=241 crianças. Faixa 8 meses - 14 anos, média 6 anos. 103 crianças (42,7%) consultadas por febre; 48 por dor de garganta, 11 por erupção cutânea e 47 por outros sintomas. 95% das crianças receberam alta. DRASP negativo 87,6% (N: 211) e positivo 12,9% (N: 31). EP negativo 80,1% (n: 193) e positivo para SßHGA em 13,7% (n: 33). A sensibilidade do teste foi de 52% e a especificidade de 93%. O PPV 55% e o negativo 92%. O diagnóstico mais frequente foi faringite viral 132 (54,7%). Conclusões: o teste foi aplicado principalmente em escolares febris, alguns com odinofagia. A rápida diferenciação etiológica é útil, pois evita o uso de antibióticos em caso de resultado negativo. Esses resultados apoiam o uso do DRASP em enfermarias de emergência pediátrica.

Characteristics performance of laryngopharyngeal reflux in narrow band imaging / 临床耳鼻咽喉头颈外科杂志

Objective:To study the application value of narrow-band imaging in the diagnosis of laryngopharyngeal reflux. Methods:A total of 275 patients admitted to the inpatient department or laryngoscopy room of the Otolaryngology Head and Neck Surgery Department of the First Affiliated Hospital of Harbin Medical University from September 2022 to April 2023 due to throat discomfort were selected as the research subjects. All of them completed RSI, RFS scoring scales and electronic laryngoscopy（including ordinary white light and NBI）. According to the expert consensus of LPRD in 2022, RSI and RFS scoring scale were used as diagnostic criteria to divide them into LPR group and non-LPR group. Chi-square test was used to analyze the differences of positive rates of characteristic manifestations under NBI among different groups. The consistency of NBI and scale diagnostic methods was analyzed by Kappa, and RSI and RFS scoring were used as diagnostic criteria, The diagnostic efficiency of NBI method was analyzed. Results:There were 190 people in the LPR group, 157 of whom showed characteristic performance under the NBI mode, with a positive rate of 82.6%（157/190）; there were 85 people in the non-LPR group, with a positive rate of 18.8%（16/85）. There was a statistically significant difference in the positive rate between the two groups（χ²=102.47, P<0.05）. The consistency rate between RSI, RFS and NBI was 82.2%（226/275）. Kappa consistency analysis was used, and Kappa=0.605（P<0.05）, indicating good consistency between the two diagnostic methods. Using RSI and RFS as diagnostic criteria for LPR, the sensitivity of NBI diagnostic method was 82.6%（157/190）, specificity 81.2%（69/85）, positive predictive value 90.8%（157/173） and negative predictive value 67.6%（69/102）. Conclusion:Narrow-band imaging, as a new endoscopic imaging technique, can show small changes in mucosal surface micro vessels and play an important role in the diagnosis of laryngopharyngeal reflux.

Prognostic significance of T2 mapping in evaluating myocardium alterations in patients with ST segment elevation myocardial infarction / 中华危重病急救医学

OBJECTIVE@#To investigate the value of T2 mapping in the assessment of myocardial changes and prognosis in patients with acute ST segment elevation myocardial infarction (STEMI).@*METHODS@#A retrospective study was conducted. A total of 30 patients with acute STEMI admitted to Tianjin First Central Hospital from January 2021 to March 2022 were enrolled as the experimental group. At the same time, 30 age- and sex-matched healthy volunteers and outpatients with non-specific chest pain with no abnormalities in cardiac magnetic resonance (CMR) examination were selected as the control group. CMR was performed within 2 weeks after the diagnosis of STEMI, as the initial reference. A plain CMR review was performed 6 months later (chronic myocardial infarction, CMI). Plain scanning includes film sequence (CINE), T2 weighted short tau inversion recovery (T2-STIR), native-T1 mapping, and T2 mapping. Enhanced scanning includes first-pass perfusion, late gadolinium enhancement (LGE), and post-contrast T1 mapping. Quantitative myocardial parameters were compared between the two groups, before and after STEMI myocardial infarction. The receiver operator characteristic curve (ROC curve) was used to evaluate the diagnostic efficacy of native-T1 before myocardial contrast enhancement and T2 values in differentiating STEMI and CMI after 6 months.@*RESULTS@#There were no statistically significant differences in age, gender, heart rate and body mass index (BMI) between the two groups, which were comparable. The native-T1 value, T2 value and extracellular volume (ECV) were significantly higher than those in the control group [native-T1 value (ms): 1 434.5±165.3 vs. 1 237.0±102.5, T2 value (ms): 48.3±15.6 vs. 21.8±13.1, ECV: (39.6±13.8)% vs. (22.8±5.0)%, all P < 0.05]. In the experimental group, 12 patients were re-examined by plain CMR scan 6 months later. After 6 months, the high signal intensity on T2-STIR was still visible, but the range was smaller than that in the acute phase, and the native-T1 and T2 values were significantly lower than those in the acute phase [native-T1 value (ms): 1 271.0±26.9 vs. 1 434.5±165.3, T2 value (ms): 34.2±11.2 vs. 48.3±15.6, both P < 0.05]. ROC curve analysis showed that the area under the ROC curve (AUC) of native-T1 and T2 values in differentiating acute STEMI from CMI was 0.71 and 0.80, respectively. When native-T1 cut-off value was 1 316.0 ms, the specificity was 100% and the sensitivity was 53.3%; when T2 cut-off value was 46.7 ms, the specificity was 100% and the sensitivity was 73.8%.@*CONCLUSIONS@#The T2 mapping is a non-invasive method for the diagnosis of myocardial changes in patients with acute STEMI myocardial infarction, and can be used to to evaluate the clinical prognosis of patients.