Factores de riesgo de ingreso a unidad de cuidados intensivos o mortalidad en adultos hospitalizados por COVID-19 en altura / Risk factors for intensive care unit admission or mortality in adults hospitalized for COVID-19 at high altitude

RESUMEN Objetivo. Determinar los factores de riesgo de ingreso a unidad de cuidados intensivos (UCI) o mortalidad en pacientes hospitalizados por COVID-19 en un hospital de Puno, Perú. Materiales y métodos. Estudio de cohorte retrospectivo en adultos hospitalizados entre abril y diciembre del 2020. Se evaluaron características sociodemográficas, funciones vitales, comorbilidades, tratamiento recibido y su asociación con el ingreso a UCI o mortalidad (desenlace adverso). Se utilizó regresión de Poisson con varianza robusta para calcular riesgos relativos (RR) crudos y ajustados con sus intervalos de confianza al 95% (IC95%). Resultados. Se analizaron 348 historias clínicas. La mediana de edad en años fue 42,5 (RIC: 30,0; 58,0); el 38,2% fueron varones, y el 35,3% falleció o ingresó a UCI. Los que ingresaron con una saturación de oxígeno ≤ 75%, tuvieron 2,79 veces la probabilidad de tener el desenlace adverso (p < 0,001), en comparación con los que ingresaron con una saturación ≥ 85%; los que ingresaron con un valor entre 75-79% tuvieron 2,92 veces la probabilidad de tener el desenlace adverso (p < 0,001); asimismo, los que ingresaron con saturación entre 80-84% tuvieron 1,70 veces la probabilidad de presentar el desenlace adverso; sin embargo la diferencia no fue estadísticamente significativa (p=0,066). Además, hubo mayor riesgo de desenlace adverso en pacientes de sexo masculino RR= 1,75 (p<0,001), edad > 40 años RR 3,5 (p=0,001), taquipnea RR=1,66 (p=0,010), o con diabetes, RR = 1,53 (p=0,011). Conclusiones . Los factores de riesgo para ingresar a UCI o mortalidad por COVID-19 fueron el sexo masculino, edad mayor de 40 años, saturación baja, diabetes y taquipnea.

ABSTRACT Objective. To determine the risk factors for admission to the intensive care unit (ICU) or mortality in patients hospitalized for COVID-19 in a hospital in Puno, Peru. Materials and methods. Retrospective cohort study in adults hospitalized between April and December 2020. We evaluated Sociodemographic characteristics, vital functions, comorbidities, treatment received and its association with admission to ICU or mortality (adverse outcome). Poisson regression with robust variance was used to calculate crude and adjusted relative risks (RR) with their 95% confidence intervals (95%CI). Results. A total of 348 medical records were analyzed. The median age in years was 42.5 (IQR: 30.0; 58.0); 38.2% were male, and 35.3% died or were admitted to the ICU. Those admitted with an oxygen saturation ≤ 75% were 2.79 times more likely to have the adverse outcome (p < 0.001), compared to those admitted with a saturation ≥ 85%; those admitted with a value between 75-79% were 2.92 times more likely to have the adverse outcome (p < 0.001); likewise, those admitted with saturation between 80-84% were 1.70 times more likely to have the adverse outcome; however, the difference was not statistically significant (p=0.066). In addition, male patients, RR= 1.75 (p<0.001); those aged > 40 years, RR 3.5 (p=0.001); those with tachypnea, RR=1.66 (p=0.010); or with diabetes, RR = 1.53 (p=0.011) had higher risk of presenting the adverse outcome. Conclusions. The risk factors for ICU admission or mortality due to COVID-19 were male sex, age over 40 years, low saturation, diabetes and tachypnea.

Comparative evaluation of dental pulp tests in pulpal status diagnostics / Evaluación comparativa de pruebas de pulpa dental en el diagnóstico del estado pulpar

Introduction: The purpose of this study was to evaluate the effectiveness and compare the accuracy of pulp tests in the diagnosis of teeth pulpal health. Material and Methods: Traumatized (n=71) and non-traumatized (n=71) teeth from 42 patients were evaluated. Each tooth underwent cold, heat, electric and oximetry tests, followed by radiographic examination and calculation of the sensitivity, specificity, PPV, NPV and accuracy. Results: Clinical and radiographic examination showed no alteration for the 71 teeth from the intact contralateral group. From the traumatized group, 29 teeth presented complete endodontic treatment, 17 presented periapical alterations that required endodontic treatment and 25 teeth did not present conclusive radiographic alteration. The cold test showed a significantly higher proportion of correct results, while the electric test showed a significantly lower proportion. The data showed higher accuracy for the cold, followed by oximeter and heat tests, while the electric test presented the lowest accuracy. Cold and oximeter tests proved superior over the electric and heat tests, while the electric test showed better parameters when diagnosing diseased pulp. Conclusion: Combining two pulp tests seems reasonable for improving the pulp diagnoses using both oximeter and cold or oximeter and heat tests to detect healthy pulp; or cold and electric tests to define diseased pulp.

Introducción: El propósito de este estudio fue evaluar la efectividad y comparar la precisión de las pruebas pulpares en el diagnóstico de la salud pulpar de los dientes. Material y Métodos: Se evaluaron dientes traumatizados (n=71) y no traumatizados (n=71) de 42 pacientes. Cada diente se sometió a pruebas de frío, calor, eléctricas y de oximetría, seguidas de examen radiográfico y cálculo de la sensibilidad, especificidad, VPP, VPN y precisión. Resultados: El examen clínico y radiográfico no mostró alteración en los 71 dientes del grupo contralateral intacto. Del grupo traumatizado, 29 dientes presentaron tratamiento endodóntico completo, 17 presentaron alteraciones peri-apicales que requirieron tratamiento endodóntico y 25 dientes no presentaron alteración radiográfica concluyente. La prueba en frío mostró una proporción significativamente mayor de resultados correctos, mientras que la prueba eléctrica mostró una proporción significativamente menor. Los datos mostraron mayor precisión para la prueba de frío, seguida de las pruebas de oxímetro y calor, mientras que la prueba eléctrica presentó la menor precisión. Las pruebas de frío y oxímetro demostraron ser superiores a las pruebas eléctricas y de calor, mientras que la prueba eléctrica mostró mejores parámetros al momento de diagnosticar pulpa enferma. Conclusión: La combinación de dos pruebas pulpares parece razonable para mejorar los diagnósticos pulpares utilizando tanto el oxímetro como las pruebas de frío u oxímetro y calor para detectar una pulpa sana; o pruebas de frío y eléctricas para definir pulpa enferma.

Utilidad del monitoreo hemodinámico con espectroscopia cercana infrarroja en pediatría / Use of near infrared spectroscopy for hemodynamic monitoring in pediatrics

La espectroscopia cercana infrarroja (NIRS, por su sigla en inglés), es una técnica óptica no invasiva y no ionizante utilizada para medir la oxigenación tisular regional a través de sensores transcutáneos. En los últimos años, han aumentado de manera exponencial las publicaciones sobre este tema; esto refleja el creciente interés de investigadores y clínicos por la utilización de esta nueva tecnología y los beneficios que podría ofrecerles a los pacientes pediátricos. El objetivo de esta revisión es dar a conocer el funcionamiento y las posibles aplicaciones de la saturación regional medida por NIRS, así como los desafíos en el futuro.

Near infrared spectroscopy (NIRS) is a non-invasive optical technique for the evaluation of regional tissue oxygenation using transcutaneous detectors. In recent years, publications about this topic have increased exponentially; this reflects the growing interest among investigators and clinicians about this new technology and its potential benefits for pediatric patients. The objective of this review is to know the functioning and potential uses of regional saturation measured by NIRS and establish future challenges.

Detección de cardiopatías congénitas críticas en recién nacidos en Argentina a través del sistema nacional de vigilancia de anomalías congénitas (RENAC) / Detection of critical congenital heart disease among newborns in Argentina through the national surveillance system of congenital heart disease (RENAC)

Introducción. Las cardiopatías congénitas críticas (CCC) son las anomalías estructurales del corazón ductus-dependientes, que pueden llevar a la muerte o requieren tratamiento invasivo en el primer mes de vida. Objetivo. Conocer la prevalencia y distribución de CCC en recién nacidos de Argentina, en comparación con otros países, y la proporción de detección prenatal y de mortalidad perinatal. Material y métodos. Se utilizó material de la Red Nacional de Anomalías Congénitas de Argentina (RENAC) del período 2009-2018, y de otros sistemas de vigilancia de Estados Unidos (EE. UU.), Europa y Colombia. Para Argentina se analizó la proporción de detección prenatal, mortalidad perinatal y prevalencia de recién nacidos con CCC según jurisdicción y subsector de salud. Resultados. Prevalencia de CCC de 11,46 (IC95 %: 11,02-11,92) cada 10 000 nacimientos. El 43,93 % tuvo detección prenatal y la mortalidad perinatal fue del 25 %. La tetralogía de Fallot fue el defecto específico más frecuente. La prevalencia de CCC y el porcentaje de detección prenatal fue significativamente menor en el subsector público, mientras que la mortalidad perinatal fue mayor en este subsector. La prevalencia de CCC observada fue menor que en los registros de EE. UU. (NBDPN) y Europa (EUROCAT). El registro de Bogotá mostró prevalencias específicas diferentes. Conclusión. La prevalencia de CCC es más baja que la observada en otros países, y aún menor en el sector público de Argentina. Se enfatiza la necesidad de mejorar la detección prenatal e implementar la oximetría de pulso en recién nacidos como prueba de tamizaje obligatorio y universal.

Introduction. Critical congenital heart disease (CCHD) is a term that refers to ductus-dependent structural anomalies of the heart that may be fatal or require invasive management in the first month of life. Objective. To know the prevalence and distribution of CCHD among newborns in Argentina, compared to other countries, and the proportion of prenatal detection and perinatal mortality. Material and methods. Data provided by the National Network of Congenital Anomalies (Red Nacional de Anomalías Congénitas de Argentina, RENAC) for the 2009-2018 period and by other surveillance systems in the United States, Europe, and Colombia were used. For Argentina, the proportion of prenatal detection, perinatal mortality, and CCHD prevalence in newborns by jurisdiction and health system subsector were analyzed. Results. The prevalence of CCHD was 11.46 (95% confidence interval: 11.02-11.92) every 10 000 births. Prenatal detection was possible in 43.93% of cases, and perinatal mortality was 25%. Tetralogy of Fallot was the most frequent specific defect. The prevalence of CCHD and percentage of prenatal detection was significantly lower in the public subsector, whereas perinatal mortality was higher in this subsector. The prevalence of CCHD was lower than in the United States (NBDPN) and European (EUROCAT) registries. The Bogotá Registry showed different specific prevalence values. Conclusion. The prevalence of CCHD is lower than what has been observed in other countries, and even lower in the public sector of Argentina. The need to improve prenatal detection and implement pulse oximetry among newborns as a mandatory and universal screening is emphasized.

Performance de l'oxymétrie nocturne dans le diagnostic du Syndrome d'apnées Hypopnées Obstructives du sommeil à Kinshasa / Performance of nocturnal oximetry in the diagnosis of Obstructive Sleep Apnea Hypopnea Syndrome in Kinshasa

Contexte et objectif. La prise en charge d'un patient avec un syndrome d'apnées hypopnées obstructives du sommeil (SAHOS) nécessite l'enregistrement du sommeil qui reste très peu accessibilité en Afrique subsaharienne. La présente étude a évalué la performance de l'oxymétrie nocturne dans le diagnostic du SAHOS à Kinshasa. Méthodes. Dans une étude transversale et analytique, tous les patients à risque de SAHOS ont bénéficié d'une oxymétrie nocturne et d'une polygraphie ventilatoire entre juillet 2021 et mars 2022. La sensibilité (Se), la spécificité (Sp) et les valeurs prédictives positive (VPP) et négatives (VPN) de l'oxymétrie nocturne ont été déterminées. La courbe ROC a été rapportée, aire sous la courbe (ASC) calculée, p < 0,05. Résultats. 323 patients ont été inclus (âge moyen de 57,9 ± 13,1 ans avec un sex ratio H/F de 1,5). L'obésité centrale était présente chez 88 %. Le STOP-BANG moyen était de 4,8 ±0,9. Les comorbidités les plus rencontrées étaient l'HTA (58,5%), le diabète sucré (22,6%), la BPCO (9,3%) et l'AVC 2,2%. La Se et Sp étaient respectivement, de 94,4 et 88,9% et ASC à 0, 92. Conclusion. L'oxymétrie nocturne est un examen non invasif d'accès facile ayant une sensibilité et une spécificité élevée dans le diagnostic du SAHOS dans notre milieu.

Effect of information-motivation-behavior skills on adherence of continuous positive airway pressure therapy in patients with obstructive sleep apnea hypopnea syndrome / 中南大学学报(医学版)

OBJECTIVES@#Obstructive sleep apnea hypopnea syndrome (OSAHS) is a common disease that seriously affects health. Continuous positive airway pressure (CPAP) therapy is the preferred treatment for moderate-to-severe OSAHS patients. However, poor adherence to CPAP is a major obstacle in the treatment of OSAHS. Information-motivation-behavioral (IMB) skills, as a kind of mature technology to change the behavior, has been used in various health areas to improve treatment adherence. This study aims to explore the effects of the IMB skills intervention on CPAP adherence in OSAHS patients.@*METHODS@#Patients who were primary diagnosed with moderate-to-severe OSAHS were randomly divided into the IMB group (n=62) and the control group (n=58). The patients in the IMB group received CPAP therapy and the IMB skills intervention for 4 weeks. The patients in the control group received CPAP therapy and a usual health care provided by a registered nurse. We collected the baseline data of the general information, including age, sex, body mass index (BMI), the Epworth Sleepiness Scale (ESS) score, the Hospital Anxiety and Depression Scale (HADS) score, and indicators about disease severity [apnea-hypopnea index (AHI), percentage of time with arterial oxygen saturation SaO2<90% (T90), average SaO2, lowest SaO2, arousal index]. After CPAP titration, we collected CPAP therapy-relevant parameters (optimal pressure, maximum leakage, average leakage, 95% leakage, and residual AHI), score of satisfaction and acceptance of CPAP therapy, and score of willingness to continue CPAP therapy. After 4 weeks treatment, we collected the ESS score, HADS score, CPAP therapy-relevant parameters, effective CPAP therapy time per night, CPAP therapy days within 4 weeks, CPAP adherence rate, score of satisfaction and acceptance of CPAP therapy, and score of willingness to continue CPAP therapy. Visual analog scale (VAS) of 0-5 was used to evaluate the satisfaction and acceptance of IMB intervention measures in the IMB group.@*RESULTS@#There were no significant differences in the baseline level of demographic parameters, ESS score, HADS score, disease severity, and CPAP therapy related parameters between the IMB group and the control group (all P>0.05). There were no significant differences in score of willingness to continue CPAP therapy, as well as score of satisfaction and acceptance of CPAP therapy after CPAP titration between the IMB group and the control group (both P>0.05). After 4 weeks treatment, the ESS score, HADS score, maximum leakage, average leakage, and 95% leakage of the IMB group were significantly decreased, while the score of satisfaction and acceptance of CPAP therapy and willingness to continue CPAP therapy of the IMB group were significantly increased (all P<0.05); while the above indexes in the control group were not different before and after 4 weeks treatment (all P<0.05). Compared with the control group, the ESS score, HADS score, maximum leakage, average leakage, and 95% leakage of the IMB group after 4 weeks treatment were significantly lower (all P<0.05); the effective CPAP therapy time, CPAP therapy days within 4 weeks, score of satisfaction and acceptance of CPAP therapy, score of willingness to continue CPAP therapy of the IMB group were significantly higher (all P<0.05). The rate of CPAP therapy adherence in 4 weeks of the IMB group was significantly higher than that of the control group (90.3% vs 62.1%, P<0.05). The VAS of overall satisfaction with IMB skills intervention measures was 4.46±0.35.@*CONCLUSIONS@#IMB skills intervention measures can effectively improve the adherence of CPAP therapy in OSAHS patients, and is suitable for clinical promotion.

Neuromonitoreo no invasivo en unidades de cuidados intensivos en Colombia / Non-invasive neuromonitoring in intensive care units in Colombia

Resumen | El monitoreo electroencefalográfico no invasivo continuo es una técnica indispensable en los pacientes neurológicos críticos, ya que muestra de forma directa e indirecta su actividad cerebral y permite relacionar los hallazgos con su estado clínico. Es muy sensible, aunque su especificidad es menor, por lo que puede demostrar la alteración del estado de conciencia sin aclarar su etiología. El uso del registro electroencefalográfico continuo en pacientes con alteraciones del estado de conciencia, convulsiones, o estado epiléptico convulsivo y no convulsivo, se ha incrementado en los últimos años porque permite obtener información en tiempo real de la función cerebral y de los cambios en el tiempo; además, facilita la detección de crisis epilépticas subclínicas y electrográficas, estas últimas de gran importancia, ya que no presentan correlación clínica. Los hallazgos del monitoreo permiten modificar el tratamiento farmacológico y anticonvulsivo, y constituyen una gran ventaja para el médico tratante en la toma de decisiones oportunas que redunden en la mejoría del pronóstico del paciente.

Abstract | Continuous non-invasive electroencephalographic monitoring is an essential technique for critical care patients as it shows directly and indirectly the patient's brain activity and makes it possible to relate it with findings in the clinical status. It is highly sensitive, although its specificity is lower, so they can show alterations of the state of consciousness without clarifying the etiology. Continuous electroencephalographic recording in patients with altered levels of consciousness, seizures, and convulsive and non-convulsive status epilepticus has been increasing in recent years as real-time feedback of the cerebral function shows evolution changes and allows for the identification of electric and subclinical epileptic seizures that are highly important since they do not have clinical correlations. These findings in electroencephalographic monitoring also help to modify pharmacological and antiseizure treatments. For practitioners, they are advantageous when making timely decisions that impact the prognosis of the patient.

Oximetria de pulso na atenção básica: produção de conteúdo digital na pandemia de covid-19 / Pulse oximetry in basic attention: production of digital content in the pandemic of covid-19 / Oximetría de pulso en atención básica: producción de contenido digital en la pandemia de covid-19

O oxímetro de pulso, por possibilitar a monitorizarão dos níveis de oxigênio no sangue, é um importante recurso no contexto da pandemia de Covid-19. O objetivo deste relato é descrever a experiência de profissionais da Escola Estadual de Saúde Pública (ESPBA) no processo de produção de um conteúdo educacional digital, voltado a profissionais da saúde da atenção básica, intitulado "O uso do oxímetro de pulso como estratégia de monitoramento dos casos suspeitos ou confirmados de Covid-19". Esse conteúdo integrou o Curso de Identificação e Cuidados Precoces na Covid-19, e fez parte de um bloco de três videoaulas, disponibilizadas no ambiente virtual da ESPBA e na plataforma YouTube, denominado Webaula 5. Dos 1.704 discentes que responderam o formulário final de avaliação da webaula, 97% consideraram que os conteúdos atenderam ou superaram as expectativas. No YouTube, até novembro de 2020, já havia 10.405 visualizações, com 73% de comentários positivos, sendo os outros 27% composto por comentários negativos, perguntas e identificação da audiência. Essa experiência proporcionou uma maior aproximação dos profissionais da ESPBA com ferramentas pedagógicas mediadas pelas Tecnologias Digitais de Informação e Comunicação, maior articulação com técnicos de referências municipais e estaduais, além de contribuir para a disseminação e acesso do conhecimento técnico-científico sobre a Covid19 pelos profissionais da atenção básica. A qualificação das docentes da ESPBA em estratégias de ensino-aprendizagem on-line se faz necessária, de forma a ampliar as ações de educação permanente por meio de tecnologias digitais na Bahia.

The pulse oximeter is an important resource in the context of the Covid-19 pandemic, since it makes possible to monitor blood oxygen levels. The purpose of this report is to describe the experience of professionals from the State School of Public Health-ESPBA in the process of producing a digital educational content aimed at primary care health professionals entitled "The use of the pulse oximeter as a strategy for monitoring suspected or confirmed cases of Covid-19". This content was part of the "Course on Identification and Early Care at Covid-19" and was part of a block of 3 video classes, available on the ESPBA Virtual Environment and on the You Tube Platform called Webaula 5. Of the 1,704 students that answered the form final evaluation of webaula 97% considered that the contents met or exceeded expectations. On You Tube, until November 2020, there were 10,405 views, with 73% positive comments, the other 27% consisting of negative comments, questions and audience identification. This experience provided ESPBA professionals with a closer relationship with pedagogical tools mediated by Digital Information and Communication Technologies, greater articulation with technicians from municipal and state references, in addition to contributing to the dissemination and access of technical-scientific knowledge about Covid-19 by professionals of Primary Care. The qualification of ESPBA teachers in online teaching-learning strategies is necessary to expand Permanent Education actions through digital technologies in Bahia.

El oxímetro de pulso, que permite medir la saturación de oxígeno en la sangre, es un aparato importante en el contexto de la pandemia de Covid-19. El propósito de este informe es describir la experiencia de los profesionales de la Escuela Estadual de Salud Pública (ESPBA) en el proceso de producción de un contenido educativo digital dirigido a los profesionales de la salud de atención primaria denominado "El uso del oxímetro de pulso como estrategia de seguimiento de casos sospechosos o positivados de covid-19". Este contenido fue parte del Curso de Identificación y Atención Temprana en Covid-19 y constó de un bloque de tres video clases, disponibles en el entorno virtual ESPBA y en la plataforma YouTube denominado Webaula 5. De los 1.704 alumnos que contestaron el formulario de evaluación final de webaula, el 97% consideró que los contenidos cumplieron o superaron sus expectativas. En YouTube, hasta noviembre de 2020, hubo 10.405 visualizaciones, con un 73% de comentarios positivos y un 27% entre comentarios negativos, preguntas e identificación de audiencia. Esta experiencia brindó a los profesionales de la ESPBA una relación más cercana con las herramientas pedagógicas mediadas por las tecnologías de la información y la comunicación digitales, una mayor articulación con técnicos de referencia municipal y estadual, además de contribuir a la difusión y acceso del conocimiento técnico-científico sobre el covid-19 por parte de los profesionales de atención primaria. La calificación de los docentes de la ESPBA en estrategias de enseñanza-aprendizaje en línea es necesaria para expandir las acciones de educación permanente por medio de las tecnologías digitales en Bahía.

Oximetría de pulso y su eficacia para diagnosticar vitalidad pulpar / Pulse oximetry and its use in diagnosing pulp vitality

Objetivo: Identificar y analizar en la literatura científica reciente el uso de la oximetría de pulso como método diagnóstico de vitalidad pulpar. Metodología: En este trabajo se llevó a cabo una revisión de la literatura en las plataformas de PubMed y Google Académico, en la cual se analizó el uso de la oximetría de pulso en el diagnóstico y monitoreo odontológico del estado pulpar. Resultados: Después de una exhaustiva revisión, y de acuerdo con los criterios de inclusión y exclusión, se analizaron 21 artículos. La mayoría de los trabajos consideran la oximetría de pulso un método alternativo de diagnóstico indoloro, seguro y eficaz; sin embargo, la adaptación de un instrumento de uso exclusivo odontológico es necesaria para una medición exacta de la saturación de oxígeno en la pulpa dental. Los avances tecnológicos en el campo clínico de la odontología nos han llevado a la búsqueda de nuevas técnicas diagnósticas clínicas para mejorar la atención y los tratamientos de los pacientes que acuden día con día a recibir una consulta odontológica. Conclusiones: En los últimos años la oximetría de pulso ha demostrado ser una herramienta de diagnóstico eficaz para el diagnóstico de la vitalidad pulpar. El análisis de los artículos incluidos en esta revisión concluye que la oximetría de pulso es una técnica innovadora que puede ser utilizada como una herramienta diagnóstica adyuvante en el diagnóstico de la vitalidad pulpar (AU)

Objective: To identify and analyze in the recent scientific literature the use of pulse oximetry as a diagnostic method for pulp vitality. Methodology: In this work, a literature review was carried out on the PubMed and Google Scholar platforms in which the use of pulse oximetry in the dental diagnosis and monitoring of pulp status was analyzed. Results: After an exhaustive review and in accordance with the inclusion and exclusion criteria, 21 articles were analyzed. Most of the studies consider pulse oximetry an alternative method of painless, safe and effective diagnosis, however, the adaptation of an instrument for exclusive dental use is necessary for an exact measurement of the oxygen saturation in the dental pulp. Technological advances in the clinical field of dentistry have led us to search for new clinical diagnostic techniques to improve the care and treatment of patients who come every day to receive a dental consultation. Conclusions: In recent years, pulse oximetry has proven to be an effective diagnostic tool for the diagnosis of pulp vitality. The analysis of the articles included in this review concludes that pulse oximetry is an innovative technique that can be used as an adjunct diagnostic tool in the diagnosis of pulp vitality (AU)

Importancia de la pulsioximetría como herramienta para el tamizaje de cardiopatías congénitas críticas / Importance of pulseoximetry as a tool for screening critical congenital heart disease

Al editor: Hemos leído con sumo interés el artículo recientemente publicado en su revista por Ramírez-Escobar, et al., titulado "La pulsioximetría como herramienta para la tamización de cardiopatías congénitas críticas. Una revisión narrativa". A raíz de los datos señalados en los resultados del estudio quisiéramos realizar las siguientes puntualizaciones. En primer lugar, coincidimos con los autores en la importancia y la utilidad del uso de lo pulsioximetría como herramienta de tamizaje para la detección principalmente de cardiopatías congénitas críticas en neonatos, considerando que las cardiopatías congénitas son la malformación mayor más común que se presenta al nacimiento, con una incidencia cercana al 1 % de la población mundial (6 a 13 por 1.000 nacidos vivos), y de estas el 25 % son cardiopatías críticas, definidas como las condiciones que requieren cirugía o intervención en el primer año de vida1. Otro dato que queremos resaltar es que hoy en día no existen puntos de corte de hemoglobina para recién nacidos en altura, tema de suma importancia puesto que, como lo demuestra un estudio realizado en la Ciudad de México por Orosco A., et al., se encontró que el 4 % de niños tuvieron un tamizaje cardiológico falso-positivo, más alto que lo informado en la literatura, 0.14 %, motivo por el cual plantea que el algoritmo recomendado para el tamizaje cardiológico debe ser modificado antes de su aplicación masiva en ciudades de altura2. Además, según un estudio realizado por Wright, et al., las tasas de falla de detección de oximetría de pulso a altitud moderada son significativamente más altas que a nivel del mar; adicionalmente, también señala que se requieren estudios más grandes con algoritmos alternativos a altitudes moderadas3, por lo cual este tema abre nuevas prioridades en investigación en nuestro país.

Función pulmonar: medición continua de la saturación del pulso arterial de oxígeno: propuesta para interpretación / Continuous measurement of oxygen arterial pulse saturation: an interpretation proposal

La medición continua de la saturación de pulso arterial de oxígeno (SpO2) es un método no invasivo, confiable y seguro. El consolidado permite obtener valores promedio de SpO2 y frecuencia cardiaca, gráficos y valores acumulados, rangos de valores de SpO2, que permiten definir si existe o no alguna alteración. Los avances tecnológicos han dado paso a la fabricación de equipos con alta exactitud de las mediciones, mediante algoritmos matemáticos que filtran los artefactos debido a movimientos y/o hipoperfusión. La ventaja, es una mayor precisión para determinar estados de hipoxemia en distintas situaciones clínicas. Las principales indicaciones en pediatría son la determinación de hipoxemia y titulación de oxígeno en niños con enfermedades que comprometen el sistema respiratorio, especialmente displasia broncopulmonar. También se usa como screening para apneas obstructivas del sueño en rango moderado a severo en situaciones en que no es posible realizar poligrafía o polisomnografía, dado la facilidad con la que se puede realizar la medición continua de SpO2 en domicilio u hospitalizado. En este artículo se describen características importantes del procedimiento, y se propone un esquema para ordenar su interpretación.

Continuous measurement of arterial oxygen saturation by pulse oximetry (SpO2) is a non-invasive, reliable, and safe method. The consolidated allows obtaining average values of SpO2 and heart rate, graphs and accumulated values, ranges of SpO2 values, which allow defining whether or not there is any alteration. Technological advances have given way to the manufacture of equipment with high measurement accuracy, using mathematical algorithms that filter artifacts due to movements and/or hypoperfusion. The main indications are the diagnosis of hypoxemia and titration of oxygen requirements in patients with chronic lung damage and other diseases that compromise the respiratory system. Also, it is used as screening of moderate to severe obstructive apneas when other sleep studies, such as polysomnography or polygraphy, are not available. It can be done at home or hospitalized. This article describes important characteristics of the procedure, and a scheme is proposed to order its interpretation.

Hipoxemia silenciosa y uso de oxímetro de pulso en el hogar para detección precoz de complicaciones por Covid-19: reporte de un caso y revisión de la literatura / Silent hypoxemia and use of pulse oximeter at home for early detection of complications from Covid-19: a case report and review of the literature

Silent hypoxemia is one of the clinical presentations caused by SARS-CoV-2. It is still considered a medical mystery, as there are inconsistencies between arterial oxygen saturation levels and respiratory symptoms; a clinical scenario that had not been seen before. Their main risk is that it delays medical assistance because they do not have breathing difficulties and, when they consult, the lung damage is quite advanced. The early detection of hypoxia can favor the premature diagnosis of COVID-19 pneumonia and start treatment without delay. The pulse oximeter is presented as a useful, inexpensive, and easy-to-use tool for monitoring oxygen saturation at home in mild illness and detecting silent hypoxemia. This work presents the case of a patient with COVID-19 who, thanks to the use of a pulse oximeter at home, was able to detect silent hypoxemia and favored the early diagnosis of SARS-CoV-2 pneumonia. (AU)

Diagnostic accuracy of oximetry for obstructive sleep apnea: a study on older adults in a home setting

OBJECTIVES: Owing to the fact that obstructive sleep apnea (OSA) is an underreported disease, the strategy used for the diagnosis of OSA has been extensively dissected to devise a simplified process that can be accessed by the public health services. Polysomnography (PSG) type I, the gold standard for the diagnosis of OSA, is expensive and difficult to access by low-income populations. In this study, we aimed to verify the accuracy of the oxyhemoglobin desaturation index (ODI) in comparison to the apnea-hypopnea index (AHI) using a portable monitor. METHODS: We evaluated 94 type III PSG home test results of 65 elderly patients (69.21±6.94 years old), along with information, such as the body mass index (BMI) and sex, using data obtained from a clinical trial database. RESULTS: A significant linear positive correlation (r=0.93, p<0.05) was observed between ODI and AHI, without any interference from sex, BMI, and positional component. The sensitivity of ODI compared to that of AHI increased with an increase in the severity of OSA, while the specificity of ODI in comparison to that of AHI was high for all degrees of severity. The accuracy of ODI was 80.7% for distinguishing between patients with mild and moderate apnea and 84.4% for distinguishing between patients with moderate and severe apnea. CONCLUSION: The ODI values obtained in uncontrolled conditions exhibited high sensitivity for identifying severe apnea compared to the AHI values, and correctly identified the severity of OSA in more than 80% of the cases. Thus, oximetry is promising strategy for diagnosing OSA.

Apport de la saturométrie dans le dépistage des cardiopathies congénitales cyanogènes chez les nouveau-nés au CNHU-HKM Cotonou, faisabilité et résultats préliminaires en 2019 / NA

Introduction : Les cardiopathies congénitales critiques représentant 25% des cardiopathies congénitales et s'accompagnent souvent de désaturation, d'où l'intérêt de l'utilisation de la saturation pulsée en oxygène pour favoriser leur détection chez tous les nouveau-nés avant la sortie de maternité et un traitement adéquat. Au Bénin la saturométrie de dépistage est encore peu utilisée. Cette étude avait pour objectif d'étudier l'apport de la saturométrie dans le dépistage des cardiopathies congénitales cyanogènes au CNHU-HKM de Cotonou en 2019. Méthodes : Il s'agissait d'une étude transversale, descriptive et analytique qui s'est déroulée du 15 mai au 13 novembre 2019 et ayant inclus les nouveau-nés, nés au CNHU- HKM. Tous les enfants ont bénéficié d'un examen clinique et d'un test de saturométrie. L'échographie Döppler cardiaque a été réalisée chez tous les patients et utilisée comme gold standard pour déterminer les performances diagnostiques de la saturométrie pour le dépistage des cardiopathies congénitales cyanogènes. Résultats : un total de 379 nouveau-nés ont été inclus. L'acceptabilité parentale était de 72,64%. La saturométrie a permis de détecter 4 cas d'hypertension artérielle pulmonaire persistante du nouveau-né (HTAPP) associée à un foramen ovale shuntant droite-gauche. La saturométrie de dépistage avait une sensibilité de 100%, une spécificité de 94,93% et une valeur prédictive positive à 17,4%. Malgré son faible caractère discriminant pour les autres causes de désaturation, la valeur prédictive négative était de 100%. L'examen clinique améliore les performances diagnostiques de la saturométrie pour le dépistage des cardiopathies congénitales cyanogènes. Conclusion : La saturométrie est un test de dépistage aisément utilisable dans nos conditions de travail et avec une bonne acceptabilité parentale. Malgré son faible caractère discriminant, ses performances diagnostiques sont excellentes pour le dépistage des cardiopathies congénitales cyanogènes.

ABSTRACT Introduction: Critical congenital heart disease represented 25% of congenital heart disease and are often accompanied by desaturation, hence the interest to use pulse oximeter in order to detect all newborns who have congenital heart disease before discharge after birth. In Benin, pulse oximetry screening is rarely used. This study aimed to study the contribution of s pulse oximetry screening in the detection of cyanotic congenital heart disease at the CNHU-HKM in Cotonou in 2019. Results: 379 newborns were included. The parental acceptability was 72.64%. Pulse oximetry detected 4 cases of newborn pulmonary hypertension with a permeable foramen oval and right to left shunt. Pulse oximetry screening had a sensitivity of 100% and a specificity of 94.93%, a positive predictive value of 17.4%. Despite its low discriminating character for the other causes of desaturation, its negative predictive value was 100%. Clinical examination improves results of pulse oximetry to detect cyanotic congenital heart disease. Conclusion: Pulse oximetry is a screening test easily used in our condition with a good parental acceptability. Despite its low discriminating character, it has an excellent accuracy to detect cyanotic congenital heart disease.

Correlation between hepatopulmonary syndrome and oxygen saturation pulse oximetry in cirrhotic patients

SUMMARY Hepatopulmonary Syndrome (HPS) is a complication of cirrhosis that worsens the disease's prognosis, pre and post liver transplant. The objective of this study is to analyze the prevalence of HPS in cirrhotic patients at our service and to correlate it with oxygen saturation (SatO2) using a pulse oximeter to evaluate if this is useful as a screening test for HPS. A prospective study was conducted in patients with hepatic cirrhosis conventionally selected from 2014 to 2016. All the patients underwent an echocardiogram with microbubbles and oxygen saturation measurement by pulse oximetry. Those with intrapulmonary shunt were submitted to arterial blood gas analysis. The relationship between oxygen saturation and HPS was assessed by the multivariate model of binary logistic regression. We analyzed 77 patients, and 23.3% (18 patients) had all criteria for HPS. The relationship between HPS and SatO2 did not show statistical significance, even after the variables were adjusted for sex, age, and smoking. Oxygen saturation alone was not able to detect HPS in the sample of cirrhotic patients. More accurate methods for screening and diagnosis of the syndrome should be used.

RESUMO A Síndrome Hepatopulmonar (SHP) é uma complicação da cirrose que piora o prognóstico da doença pré e pós-transplante hepático. O objetivo do trabalho é analisar a prevalência de SHP em pacientes cirróticos de nosso serviço e correlacioná-la com a saturação de oxigênio (SatO2) pelo oxímetro de pulso, e avaliar se este seria útil como um exame de triagem no diagnóstico de SHP. Foi realizado um estudo prospectivo em pacientes portadores de cirrose hepática no período de 2014 a 2016. Todos os pacientes foram submetidos a um ecocardiogama com microbolhas e a saturação de oxigênio pela oximetria de pulso. Aqueles com shunt intrapulmonar foram submetidos a gasometria arterial. A relação entre a saturação de oxigênio e SHP foi avaliada pelo modelo multivariado de regressão logística binário. Foram analisados 77 pacientes, destes 23,3% (18 pacientes) apresentaram todos os critérios para SHP. A relação entre a SHP com a SatO2 não obteve significância estatística, mesmo após as variáveis terem sido ajustadas pelo sexo, idade e tabagismo atual ou passado. A saturação de oxigênio, de forma isolada, não foi capaz de distinguir a SHP na amostra de pacientes cirróticos em nosso estudo. Deve-se utilizar métodos mais acurados para a triagem e diagnóstico dessa síndrome.

Noninvasive hemoglobin monitoring in clinical trials: a systematic review and meta-analysis / Monitorização não invasiva da hemoglobina em ensaios clínicos: uma revisão sistemática e metanálise

Abstract Background and objectives: The measurement of hemoglobin concentration (Hb) by co-oximetry is an innovative technique that offers efficiency and agility in the processing of information regarding the measurement of Hb obtained through continuous, non-invasive and rapid monitoring. Because of this attribute, it avoids unnecessary exposures of the patient to invasive procedures by allowing a reduction in the number of blood samples for evaluation and other unnecessary therapies. It also helps to make decisions about the need for transfusion and how to handle it. The objective of this study is to compare the performance offered to obtain Hb values between the Masimo Corporation (Irvine, CA, USA) instrument and the standard gold tool (laboratory examination). Contents: The study corresponds to a systematic review followed by meta-analysis, which included fully registered full-text clinical trials published from 1990 to 2018. PubMed, Cochrane, Medline, Embase and Web of Science databases were investigated. The mean overall difference found between the non-invasive and invasive methods of hemoglobin monitoring was 0.23 (95% CI -0.16, 0.62), that is, it did not present statistical significance (p = 0.250). The results of the analysis of heterogeneity within and between the studies indicated high levels of inconsistency (Q = 461.63, p < 0.0001, I2 = 98%), method for Hb values. Conclusions: Although the mean difference between noninvasive measurements of Hb and the gold standard method is small, the co-oximeter can be used as a non-invasive "trend" monitor in detecting unexpected responses at Hb levels.

Resumo Justificativa: A medida da concentração de hemoglobina (Hb)por co-oximetria é uma técnica inovadora que oferece eficiência e agilidade no processamento das informações referentes à medida da concentração de hemoglobina obtida por meio de monitorização contínua, não-invasiva e rápida. Por conta desse atributo, evita exposições desnecessárias do paciente a procedimentos invasivos ao possibilitar redução da quantidade de amostras sanguíneas para avaliação e de outras terapêuticas desnecessárias. Além disso, auxilia a tomada de decisões quanto à necessidade de transfusão e quanto ao manejo da mesma. Objetivo: Comparar o desempenho oferecido para a obtenção dos valores de concentração de hemoglobina entre medida não invasiva da Hb e a ferramenta padrão ouro (exame laboratorial). Conteúdo: O estudo corresponde a uma revisão sistemática seguida de metanálise que incluiu ensaios clínicos devidamente registrados com texto completo, publicados a partir de 1990 até 2018. Foram investigadas as bases de dados PubMed, Cochrane, Medline, Embase e Web Of Science. A diferença média global encontrada entre os métodos não invasivo e invasivo de monitorização da hemoglobina foi de 0,23 (95% IC -0,16; 0,62), ou seja, não apresentou significância estatística (p = 0,250). Os resultados da análise de heterogeneidade dentro e entre os estudos, apontou níveis elevados de inconsistência (Q = 461,63, p< 0,0001, I2 = 98%). Conclusão: Embora a diferença média entre as medidas não invasivas da Hb e o método padrão ouro sejam pequenas, o co-oxímetro pode ser utilizado como um monitor não invasivo de "tendência" na detecção de alterações inesperadas nos níveis de Hb.

Aspectos técnicos y regulatorios sobre el uso de oxímetros de pulso en el monitoreo de pacientes con COVID-19, 7 de agosto del 2020 / Technical and Regulatory Aspects of the Use of Pulse Oximeters in Monitoring COVID-19 Patients, 7 August 2020

En este documento se presentan consideraciones técnicas y regulatorias para el uso de oxímetros de pulso como herramienta en el monitoreo clínico de pacientes con COVID-19. Asimismo, se resume la evidencia disponible sobre la eficacia, efectividad y seguridad de los diferentes tipos de oxímetros de pulso, sus limitaciones y recomendaciones de utilización. Está destinado a profesionales de la salud, así como a autoridades sanitarias y demás tomadores de decisiones sobre el uso de tecnologías sanitarias para la atención y cuidado de pacientes con COVID-19.

This document presents technical and regulatory considerations for the use of pulse oximeters as a tool in clinical monitoring of COVID-19 patients. It also summarizes available evidence on the efficacy, effectiveness, and safety of different types of pulse oximeters, their limitations, and recommendations for use. It is intended for health professionals, as well as health authorities and other decision makers responsible for health technologies for the care of COVID-19 patients.

Investigation of the relationship between cerebral near-infrared spectroscopy measurements and cerebrovascular event in coronary artery bypass grafting operation in patients without carotid stenosis and patients with carotid stenosis below surgical margins

Abstract Objectives: Stroke is an important cause of mortality and morbidity in surgery. In the present study, we examined the cerebral oximetry values of patients with carotid artery stenosis who did not present surgical indications and those who did not present carotid artery stenosis in coronary artery bypass grafting (CABG) surgery by comparing their cerebral oximetry values with cerebrovascular disease (CVD). Methods: Between January and May 2014, 40 patients who underwent isolated CABG were included in the study. Cerebral oximetry probes were placed prior to induction of anesthesia. Cerebral oximetry values were recorded before induction, in the pump (cardiopulmonary bypass) inlet period, in the post-clamp period, in the pump outlet period, and in the intensive care unit and neurological complications. Results: There was no difference between the groups in terms of demographic data and routine follow-up parameters. Intraoperative surgical data and early postoperative results were similar in both groups. When comparing the groups, there were no statistically significant results in cerebral oximetry values and CVD development. Only one patient in group 2 had postoperative CVD and this patient was discharged from the hospital with right hemiplegia. Mean arterial pressure (MAP)levels were significantly higher in Group 2 (P<0.05). Conclusion: The follow-up of cerebral perfusion with a method like near-infrared spectroscopy (NIRS) will ensure that MAP is adjusted with interventions that will be made according to changes in NIRS. Thus, it will be possible to avoid unnecessary medication and flow-rate increase with cerebral oxygen saturation (rSO2) follow-up.