Prevalence of Critical Congenital Heart Disease Detected in the Pulse Oximetry Test in Asymptomatic Newborns, ≥35 Gestational Weeks, in a Maternity in Southern Brazil

Abstract Background Congenital heart diseases (CHD) are one of the most prevalent malformations, and the screening tests to identify critical congenital heart disease (CCHD) is the pulse oximetry test, with subsequent investigation and treatment. Objective To quantify positive pulse oximetry tests and verify the prevalence of CCHD detected by it in asymptomatic newborns, ≥35 gestational weeks, in a Brazilian maternity hospital. Methodology This is an observational, retrospective, quantitative, analytical and cross-sectional study, conducted from October 2020 to May 2022, in a maternity hospital in southern Brazil, through the collection of records of positive oximetry pulse tests, following the norms of screening CCHD test of the Brazilian Society of Pediatrics (SBP), after they were evaluated with echocardiography for confirmation or exclusion of CHD. Results A total of 5,667 newborns were evaluated in this study, according to the inclusion criteria; 0.17% (n = 10) had a positive pulse oximetry test. Regarding the results of the echocardiography of the neonates with a positive test, two were normal, seven were cases of patent foramen ovale (PFO), and one was a case (0,017%) with interatrial communication (IAC) diagnosis. In the same period, five neonates with CCHD were born, symptomatic, diagnosed by physical examination, and referred to neonatal intensive care units (NICU) before taking the neonatal cardiac screening (< 24 hours of life). Conclusion The prevalence of positive pulse oximetry tests was 0.17% and none CCHD was detected. Five cases of CCHD were born in this period, but they were diagnosed before the recommend time to perform the screening test.

Oximetria de pulso neonatal: capacitação de profissionais e estudantes da saúde no formato remoto e presencial / Neonatal pulse oximetry: training healthcare professionals and students in remote and on-site format / Pulsioximetría neonatal: formación de profesionales y estudiantes de la salud a distancia y presencial

Introdução:A oximetria de pulso neonatal compõe o Programa Nacional de Triagem Neonatal do Brasil desde 2014. Entretanto, existem poucos registros de sua efetiva implementação na rotina de cuidados materno-infantis no país.Objetivo:O objetivo deste trabalho foi relatar a experiência em ações de educação em saúde a profissionais e estudantes da área da saúde e à população em geral, em temas relacionados ao Teste do Coraçãozinho.Metodologia:Trata-se de um estudo descritivo, do tipo relato de experiência, executado entre julho de 2019 a julho de 2021, antes e durante a pandemia de Covid-19, por discentes vinculados ao projeto de extensão de serviço universitário de referência do Rio Grande do Norte. O público-alvo das capacitações foram estudantes e profissionais do curso de Medicina, Enfermagem e Técnico de Enfermagem dos municípios de Natal, Macaíba, Santa Cruz, Currais Novos, Mossoró e Caicó, do estado do Rio Grande do Norte. Foi realizada uma capacitação no formato presencial antes da pandemia causada pela COVID-19 ou no formato remoto como adaptação das atividades durante o período pandêmico. A metodologia dos treinamentos foi composta por um formulário de pré e pós teste visando avaliar a eficácia das capacitações, somado a fundamentação teórica, simulações teórico-práticas e discussão de casos clínicos. Além disso, foram promovidas ações educativas destinadas à população geral. Resultados:As capacitações ministradas a profissionais e estudantes da área da saúde totalizaram 1212 participantes. Os eventos direcionados ao meio externo, como transmissões ao vivo e conteúdos audiovisuais em redes sociais, atingiram 12.931 pessoas. O fomento à produção científica envolveu a elaboração de 95 trabalhos aprovados em congressos regionais, nacionais e internacionais, bem como a organização de um congresso internacional nas áreas de Pediatria e Cardiologia, contabilizando 29.007 inscritos.Conclusões:Evidenciou-se a importância de intervenções para melhoria da linha de cuidado à criança cardiopata (AU).

Introduction:Neonatal pulse oximetry has been part of the National Newborn Screening Program in Brazil since 2014. However, there are few reports of its effective implementation in routine maternal and child care in the country. Objective: This study reports on the experience of providing health education to health professionals, students and the general population on topics related to neonatal pulse oximetry.Methodology: This is a descriptive study, experience report type, carried out between July 2019 and July 2021,before and during the Covid-19 pandemic, by students linked to the extension project of a reference university service in Rio Grande do Norte. The target audience of the training were students and professionals from the Medicine, Nursing and Nursing Technician course in the municipalities of Natal, Macaíba, Santa Cruz, Currais Novos, Mossoró and Caicó, in the state of Rio Grande do Norte. Training was carried out in person before the COVID-19 pandemic or remotely as an adaptation of activities during the pandemic period. The training methodology consisted of a pre-and post-test form aimed at evaluating the effectiveness of the training, in addition to theoretical foundations, theoretical-practical simulations and discussion of clinical cases. In addition, educational activities were promoted for the general population.Results:Training given to health professionals and students totaled 1212 participants. Events directed to the external environment, such as live broadcasts and audiovisual content on socialnetworks, reached 12,931 people. Promotion of scientific production involved the preparation of 95 papers approved in regional, national, and international congresses, as well as the organization of an international congress in the areas of Pediatrics andCardiology, with 29,007 registered participants. Conclusions: The importance of interventions to improve the line of care for children with heart disease was evidenced (AU).

Introducción: La oximetría de pulso neonatal forma parte del Programa Nacional de Tamizaje Neonatal en Brasil desde 2014. Sin embargo, existen pocos registros de su implementación efectiva en la atención materno-infantil de rutina en el país. Objetivo: El objetivo de este trabajo fue relatar la experiencia en acciones de educación en salud para profesionales y estudiantes del área de la salud y la población en general, sobre temas relacionados con El Test del Corazoncito. Metodología:Se trata de un estudiodescriptivo, del tipo relato de experiencia, realizado entre julio de 2019 y julio de 2021, antes y durante la pandemia de la Covid-19, por estudiantes vinculados al proyecto de extensión de un servicio universitario de referencia en Rio Grande Norte. El público objetivo de la capacitación fueron estudiantes y profesionales de la carrera de Medicina, Enfermería y Técnico en Enfermería de los municipios de Natal, Macaíba, Santa Cruz, Currais Novos, Mossoró y Caicó, en el estado de Rio Grande do Norte. La formación se realizó en formato presencial antes de la pandemia causada por el COVID-19 o a distancia como adaptación de las actividades durante el periodo de pandemia. La metodología de capacitación consistió en un formulario de pre y post test dirigido a evaluar la efectividad de la capacitación, además de fundamentos teóricos, simulacros teórico-prácticos y discusión de casos clínicos. Además, se promovieron actividades educativas para la población en general. Resultados:La formación impartida a profesionales y estudiantes de la salud totalizó 1212 participantes. Los eventos dirigidos al entorno externo, como retransmisiones en directo y contenidos audiovisuales en redes sociales, llegaron a 12.931 personas. El fomento de la producción científica implicó la elaboración de 95 trabajos aprobados en congresos regionales, nacionales e internacionales, así como la organización de un congreso internacional en las áreas de Pediatría y Cardiología, con 29.007 inscritos. Conclusiones:Se destacó la importancia de las intervenciones para mejorar la línea de atención a los niños con cardiopatías (AU).

Sensibilidad y especificidad de la oximetría de pulso para detectarcardiopatías congénitas en recién nacidos / Sensitivity and specificity of pulse oximetry to detect congenital heart disease in newborns

Resumen Objetivo: Determinar la sensibilidad y especificidad de la oximetría de pulso, para detectar cardiopatías congénitas en recién nacidos sanos en alojamiento conjunto. Material y métodos: El estudio es de tipo multicéntrico, prospectivo y transversal, evaluando pacientes del Hospital Regional de Alta Especialidad "Bicentenario 2010" y el Hospital General "Dr. Norberto Treviño Zapata", en ciudad Victoria Tamaulipas, en un periodo que comprendió desde marzo del 2015 a marzo de 2017. Se determinó la oximetría de pulso a recién nacidos sanos antes del egreso hospitalario. Resultados: Se estudiaron 511 recién nacidos. La sensibilidad detectada fue del 88.89 % y una especificidad del 99.80%. Conclusión: Las cardiopatías congénitas en recién nacidos sanos en alojamiento conjunto, se pueden determinar mediante la oximetría de pulso pre y post-ductal.

Abstract Objective: To determine the sensitivity and specificity of pulse oximetry to detect congenital heart disease in healthy newborns in rooming-in. Material and methods: The study is multicenter, prospective and cross-sectional, evaluating patients from the Regional Hospital of High Specialty "Bicentenario 2010" and the General Hospital "Dr. Norberto Treviño Zapata", in the city of Victoria Tamaulipas, in a period from march 2015 to March 2017. Pulse oximetry was determined in healthy newborns before hospital discharge. Results: 511 newborns were studied. The sensitivity detected was 88.89% and a specificity of 99.80%. Conclusion: Congenital heart disease in healthy newborns in rooming-in can be determined by pre- and post-ductal pulse oximetry.

Arterial oxygen saturation in healthy Mexican full-term newborns at different altitudes above sea level / Saturación arterial de oxígeno en recien nacidos mexicanos a término sanos a diferentes altitudes sobre el nivel del mar

Abstract Background: Arterial oxygen saturation (SaO2) values are used to make clinical decisions that might change a patient's prognosis, and it has been proposed as the fifth vital sign. This study aimed to determine the variation of SaO2 at different altitudes above sea level (ASL) in healthy Mexican full-term newborns. Methods: From July 2018 to June 2019, a cross-over study was conducted in six hospitals at different altitudes ASL in Mexico. SaO2 was measured in 4015 newborns after the first 24 h of birth and before leaving the hospital using pulse oximetry. We analyzed three groups: < 250 m ASL (group 1), 1500 m ASL (group 2), and 2250 m ASL (group 3). Results: The mean SaO2 was 97.6 ± 1.8%. For group 1, mean oxygen saturation was 98.2 ± 1.9%; for group 2, 96.7 ± 1.9%, and for group 3, 96.0 ± 2.1%. A statistically significant difference was observed among the groups (p < 0.001), and this difference was higher between groups 1 and 2 (1.5%, p < 0.001). Linear regression analysis showed a decrease in oxygen saturation of 1.01% for every 1000 m ASL. Conclusions: We demonstrated a statistically significant reduction in SaO2 levels at higher altitudes. This observation can be relevant for clinical decision-making based on pulse oximetry such as critical congenital heart disease screening in Mexico, where more than half of the population lives above 1500 m ASL.

Resumen Introducción: Los valores de SaO2 (saturación de oxígeno) se utilizan para la toma de decisiones clínicas que podrían cambiar el pronóstico del paciente. El objetivo de este estudio fue determinar la variación de la SaO2 en recién nacidos mexicanos a término sanos a diferentes altitudes en México. Métodos: Se llevó a cabo un estudio transversal en seis hospitales situados a diferentes altitudes en México. Se determinó la SaO2 usando oximetría de pulso en 4015 recién nacidos después de las primeras 24 horas de vida, pero antes del egreso del hospital de nacimiento. Se formaron tres grupos para el análisis: grupo 1 con altitud < 250 m sobre el nivel del mar (SNM); grupo 2, altitud de 1500 m SNM y grupo 3, altitud de 2250 m SNM. Resultados: El promedio de la SaO2 fue de 97.6 ± 1.8%. Para el grupo 1, la media fue 98.2 ± 1.9%, para el 2, 96.7 ± 1.9% y para el 3, 96.0 ± 2.1%. Se observó una diferencia estadísticamente significativa entre los grupos (p < 0.001), que fue mayor entre los grupos 1 y 2 (1.5%, p < 0.001). El análisis de regresión lineal mostró una reducción de 1.01% en la SaO2 por cada 1000 m SNM. Conclusiones: Se demostró una disminución estadísticamente significativa de los valores de SaO2 conforme aumenta la altitud. Esto puede ser de particular relevancia en la toma de decisions clínicas basadas en la oximetría de pulso, como el tamiz neonatal cardiaco, sobre todo en México donde mas de la mitad de la población vive a una altitud superior a 1500 m SNM.

Use of Extracorporeal Membrane Oxygenation and Cerebral Oximetry in a Stage 1 Norwood Repair for Hypoplastic Left Heart Syndrome

The role of extracorporeal membrane oxygenation (ECMO) and its indications in stage I Norwood palliation are controversial. The decision to initiate ECMO and its timing remains difficult with no definitive cut?off points or evidence?based guidelines. It varies on a case?to?case basis. We report a case where the use of ECMO was beneficial after stage I Norwood palliation with severe ventricular dysfunction. The systemic?to?pulmonary artery shunt was kept open to balance the systemic and pulmonary circulations. Cerebral oximetry can be useful as an additional monitoring modality to guide management, monitor cerebral perfusion, and help detect cerebral steal.

Construction and application of a screening system for neonatal congenital heart disease in Hainan Province / 中华实用儿科临床杂志

Objective:To assess the efficacy of the newly constructed system for screening, managing and monitoring congenital heart disease (CHD) in neonates of Hainan Province, thus providing references for a further promotion.Methods:Clinical data of neonatal CHD in Hainan Province from January 1, 2019 to December 31, 2021 were retrospectively analyzed, including screening, diagnosis and treatment, prognosis and follow-up.Relying on Hainan Women and Children′s Medical Center as the leading unit, a neonatal CHD screening, diagnosis, treatment, and monitoring system was established.A dual-indicator method was adopted, that was, screening staffs in Hainan Province performed CHD screening in living neonates by cardiac auscultation and pulse oximetry (POX) within 6-72 h after birth.Echocardiographic examinations for the screened living neonates were performed in the 31 authorized diagnosis institutions.Evaluations, interventions and treatment of living neonates with CHD were performed in 6 authorized tertiary hospitals.Data of screening, diagnosis, evaluation and treatment were filled in, uploaded and managed online through the neonatal CHD screening information management system.The research team of our hospital was responsible for the data management and monitoring.Results:From January 1 st, 2019 to December 31 st, 2021, there were 329 387 living neonates in Hainan Province, and 321 447 (97.59%) were screened for CHD, and the annual screening rate increased year by year.The positive rate of CHD screening was 2.50%(8 032/321 447). The rate of cardiac ultrasound examination within 1 week of CHD positive screening was 94.66%(7 603/8 032). The referral rate of severe CHD was 100.00%(154/154). The overall prevalence of CHD in neonates of Hainan Province was 3.419‰ (1 099/321 447). Atrial septal defect was the most common CHD lesion, with a proportion of 38.40%(422/1 099). The sensitivity of cardiac auscultation, POX and their combination for CHD detection were 69.15%, 33.49% and 91.90%, respectively, and the specificity were 98.36%, 99.43% and 97.81%, respectively.At the initial screening, the ratio of dual-positive of cardiac auscultation and POX in neonates with severe CHD (serious and critical CHD) was significantly higher than that of a single positive indicator ( χ2=36.502, 46.214, respectively; all P<0.001). All neonates with CHD were evaluated.Fifteen neonates with severe CHD died.From 2019 to 2021, the standardized mortality rate of children aged 0-1 years with CHD in Hainan province was 4.67/100 000 (15/321 447). Conclusions:Dual-indicator screening for CHD (cardiac auscultation plus POX) is reliable, non-invasive, and simple, which is conducive to be clinically promoted.Introducing and promoting an appropriate technology for screening, diagnosis, and evaluation of neonatal CHD are extremely significant since they may have contributed to the timely diagnosis and treatment of CHD, especially severe CHD, thus lowering the mortality.

Pulse oximetry test for screening congenital heart diseases: a systematic review / Prueba de oximetría de pulso para el screening de cardiopatías congénitas: revisión sistemática / Teste de oximetria de pulso para triagem de cardiopatias congênitas: revisão sistemática

ABSTRACT Objective: To determine the accuracy of the Pulse Oximetry Test (POT) in screening for Congenital Heart Diseases (CHD) in newborns in the first 48 hours of life. Method: Systematic review of diagnostic test accuracy with meta-analysis. The selection of studies was carried out in June 2021. Studies were selected with newborns, in a hospital or home environment, without a previous diagnosis of CHD, regardless of gestational age at birth, who underwent POT within the first 48 hours after birth. Registration on the PROSPERO platform - CRD42021256286. Results: Twenty-nine studies were included, totaling a population of 388,491 newborns. POT demonstrated sensitivity of 47% (95% CI: 43% to 50%) and specificity of 98% (95% CI: 98% to 98%). Subgroup analyses were carried out according to the different testing period, inclusion of retests in protocols and population of premature newborns. Conclusion: POT is a test with moderate sensitivity and high specificity. It is more effective when carried out within 24h - 48h of birth; in protocols that present retests, within two hours after the first measurement. It does not show satisfactory effectiveness for premature newborns.

RESUMEN Objetivo: Determinar la precisión de la Prueba de Oximetría de Pulso (POT) en el screening de Cardiopatías Congénitas (CC) en recién nacidos en las primeras 48 horas de vida. Método: Revisión sistemática de la precisión de las pruebas diagnósticas con metanálisis. La selección de estudios se realizó en junio de 2021. Se seleccionaron estudios con recién nacidos, en ambiente hospitalario o domiciliario, sin diagnóstico previo de CC, independientemente de la edad gestacional al nacer, a quienes se les realizó POT dentro de las primeras 48 horas después del nacimiento. Registro en la plataforma PROSPERO - CRD42021256286. Resultados: Se incluyeron 29 estudios, totalizando una población de 388.491 recién nacidos. POT demostró una sensibilidad del 47% (IC del 95%: 43% al 50%) y una especificidad del 98% (IC del 95%: 98% al 98%). Se realizaron análisis de subgrupos según los diferentes períodos de prueba, la inclusión de repruebas en los protocolos y la población de recién nacidos prematuros. Conclusión: POT es una prueba con sensibilidad moderada y especificidad alta. Es más eficaz cuando se realiza entre las 24 y 48 horas siguientes al nacimiento; en protocolos que presenten repruebas, dentro de las dos horas posteriores a la primera medición. No muestra una eficacia satisfactoria para los recién nacidos prematuros

RESUMO Objetivo: Determinar a acurácia do Teste de Oximetria de Pulso (TOP) na triagem de Cardiopatias Congênitas (CC) em recém-nascidos nas primeiras 48 horas de vida. Método: Revisão sistemática de acurácia de teste diagnóstico com metanálise. A seleção dos estudos foi realizada em junho de 2021. Foram selecionados estudos com recém-nascidos, em ambiente hospitalar ou domiciliar, sem o diagnóstico prévio de CC, independentemente da idade gestacional ao nascimento, que realizaram o TOP entre as primeiras 48h após o nascimento. Registro na plataforma PROSPERO - CRD42021256286. Resultados: Foram incluídos 29 estudos, somando uma população total de 388.491 recém-nascidos. O TOP demonstrou sensibilidade de 47% (IC 95%: 43% a 50%) e especificidade de 98% (IC 95%: 98% a 98%). Foram realizadas análises dos subgrupos conforme período de realização do teste diferente, inclusão de retestes nos protocolos e população de recém-nascidos prematuros. Conclusão: O TOP é um teste de moderada sensibilidade e alta especificidade. Apresenta maior efetividade quando realizado no intervalo entre 24h - 48h do nascimento; em protocolos que apresentem retestes, em até duas horas após a primeira medida. Não apresenta efetividade satisfatória para recém-nascidos prematuros.

A 12-month Follow-Up Study of Pulp Oxygen Saturation in Deciduous Molars After Selective and Nonselective Carious-Tissue Removal: A Randomized Pilot Trial

ABSTRACT Objective: To compare the pulp vitality of deciduous molars before and after selective caries removal (SCR) or nonselective caries removal to hard dentin (NSCR) over one year, using oxygen saturation percentage (%SaO2). Material and Methods: Deciduous molars with deep occlusal/proximal-occlusal caries lesions were randomized to SCR (n=22) or NSCR groups (n=22). After the caries removal, the teeth were protected with calcium hydroxide cement and restored with composite resin (Filtek Z250). The pulp condition diagnosis was evaluated at baseline, immediately after caries removal, and follow-up (7 days, 1-, 6- and 12-months) by %SaO2. Pulp exposure and pulp necrosis were primary outcomes, and %SaO2 was secondary. Results: Intraoperative pulp exposure occurred in four teeth of the NSCR group (18.2%) and one tooth of the SCR group (4.5%) (p>0.05). Two cases of pulp necrosis occurred in the NSCR group (10%). No difference in %SaO2 pulp was observed in the inter-and intragroup comparison over time (p>0.05). Conclusion: Advantageously, the %SaO2 minimizes preoperatory pulp vitality diagnosis subjectivity before SCR/ NSCR treatments. Furthermore, the pilot study results suggest the pulp response of deciduous molars, when evaluated by clinical, radiographic, and pulp %SaO2 seems not to differ between teeth treated with SCR or NSCR.

Mobile application-based oximetry: a potential toolfor appropriate referral of patients with respiratory symptoms examined via telemedicine

ABSTRACT Objective To calculate the positive likelihood ratio to determine whether telemedicine is able to optimize referral to the emergency department. Methods Unicenter study with 182 consecutive patients admitted to Hospital Israelita Albert Einstein due to respiratory symptoms. All patients were submitted to oxygen saturation measurement using the standard method Welch Allyn finger device vital sign monitor and a 2-minute evaluation (Binah.ai mobile application). The reproducibility of oxygen saturation measurements made with both methods was investigated using interclass correlation coefficients and analysis of dispersion. Bland-Altman plots were constructed and kappa concordance coefficients used to examine data normality. Accuracy was also estimated. Results Oxygen saturation measurement differences between methods were ≤2% in more than 85% of cases. The mean difference (bias) between methods was near zero (0.835; Bland-Altman analysis). Oxygen saturation measurements made using the Binah.ai mobile application had an average ability to detect patients with altered oxygen saturation levels compared to the conventional method (ROC analysis). The positive likelihood ratio of the mobile application was 6.23. Conclusion Mobile applications for oxygen saturation measurement are accessible user-friendly tools with moderate impact on clinical telemedicine evaluation of patients with respiratory symptoms, and may optimize referral to the emergency department.

Does radiotherapy treatment alter the pulp condition in patients with head and neck cancer? A systematic review

Abstract The main purpose of this study was to answer the question: "Can radiotherapy cause changes in the dental pulp condition of patients treated with irradiation in the head and neck region?" Clinical observational studies in adults with head and neck cancer undergoing treatment with ionizing radiation, longitudinal or cross-sectional follow-up to measure oxygen saturation (SpO2), and/or pulp sensitivity test to cold stimulation, were considered eligible. A systematic literature search was performed in six different databases, including the gray literature, and in article references. Two independent evaluators selected the studies, extracted the data, recorded the data on electronic spreadsheets, and then evaluated the methodological quality using the Checklist for Quasi-Experimental Studies tool devised by JBI. The data were assessed qualitatively using the Synthesis Without Metanalysis (SWiM) guidelines. After removing the duplicate articles, carefully analyzing the titles and abstracts, and reading the papers in full, seven studies were included. Four of the studies evaluated applied the cold sensitivity test, two associated pulse oximetry and cold sensitivity, and only one used just pulse oximetry. Evaluation using the cold sensitivity test and pulse oximetry in the initial periods before radiotherapy showed a decrease in the sensitive response and in SpO2 levels during a maximum period of 1 year. However, analyses thereafter indicated a normal response in both tests from 5 to 6 years after the end of radiotherapy treatment. Radiotherapy causes changes in pulp behavior patterns in the short term; however, recovery and return to average values occurs after long periods.

The Use of Cerebral Oximetry in Cardiac Surgery: A Systematic Review and Meta?Analysis of Randomized Controlled Trials

High prevalence of cerebral desaturation is associated with postoperative neurological complications in cardiac surgery. However, the evidence use of cerebral oximetry by correcting cerebral desaturation in the reduction of postoperative complications remains uncertain in the literature. This systematic review and meta?analysis aimed to examine the effect of cerebral oximetry on the incidence of postoperative cognitive dysfunction in cardiac surgery. Databases of MEDLINE, EMBASE, and CENTRAL were searched from their inception until April 2021. All randomized controlled trials comparing cerebral oximetry and blinded/no cerebral oximetry in adult patients undergoing cardiac surgery were included. Observational studies, case series, and case reports were excluded. A total of 14 trials (n = 2,033) were included in this review. Our pooled data demonstrated that patients with cerebral oximetry were associated with a lower incidence of postoperative cognitive dysfunction than the control group (studies = 4, n = 609, odds ratio [OR]: 0.15, 95% confidence interval [CI]: 0.04 to 0.54, P = 0.003, I 2 = 88%; certainty of evidence = very low). In terms of postoperative delirium (OR: 0.75, 95%CI: 0.50–1.14, P = 0.18, I 2 = 0%; certainty of evidence = low) and postoperative stroke (OR: 0.81 95%CI: 0.37–1.80, P = 0.61, I 2 = 0%; certainty of evidence = high), no significant differences (P > 0.05) were reported between the cerebral oximetry and control groups. In this meta?analysis, the use of cerebral oximetry monitoring in cardiac surgery demonstrated a lower incidence of postoperative cognitive dysfunction. However, this finding must be interpreted with caution due to the low level of evidence, high degree of heterogeneity, lack of standardized cognitive assessments, and cerebral desaturation interventions.

Saturación de oxígeno y lactato sérico venoso-arterial del posoperatorio de cirugía cardiaca / Venous-arterial oxygen saturation and serum lactate in the postoperative period of cardiac surgery

Resumen Introducción: La saturación de oxígeno y el lactato son marcadores de hipoxia tisular, se obtienen de muestra venosa mezclada en arteria pulmonar o venosa central. Se desconoce el comportamiento simultáneo de estos parámetros en el postoperatorio de cirugía cardiaca. Objetivo: Caracterizar la saturación de oxígeno y lactato del circuito venoso-arterial del paciente postoperado de cirugía cardiaca. Métodos: Diseño transversal analítico. En pacientes consecutivos postoperados de cirugía cardiaca se obtuvieron lactato sérico y saturación de oxígeno del circuito venoso-arterial. Las variables se informaron con mediana (percentiles 25 y 75). Se analizaron con ANOVA de Kruskal-Wallis y ajuste respectivo, correlación de Spearman, el estadístico descriptivo de Bland-Altman y coeficiente de correlación intraclase (intervalo de confianza al 95%). Una p < 0.05 se consideró significativa. Resultados: Se estudiaron 244 muestras sanguíneas de 61 pacientes. Mujeres 30 (49%). Saturación de oxígeno y lactato fueron: arterial 98 (95.3, 99.4)% y 1.7 (1,1, 2.1); venosa periférica 85 (75.4, 94)% y 1.9 (1.35, 2.3); venosa central 68.8 (58.74, 70.2)% y 1.8 (1.3, 2.3); venosa central mezclada 66.8 (61.2, 73.1)% y 1.8 (1.3, 2.2), p < 0.05. El mejor coeficiente de correlación intraclase para la saturación de oxígeno fue de vena central a vena central mezclada: 0.856 (0.760, 0.914); del lactato: 0.954 (0.923, 0.972). Conclusiones: La saturación de oxígeno difiere en el circuito venoso-arterial a diferencia del lactato, donde son similares. Los mejores valores del coeficiente de correlación intraclase para el lactato y la saturación de oxígeno fueron los obtenidos en vena central y vena central mezclada.

Abstract Introduction: Oxygen saturation and lactate are markers of tissue hypoxia; they are obtained from central venous and mixed venous sample of the pulmonary artery. The simultaneous behavior of these parameters in the postoperative period of cardiac surgery is unknown. Objective: To characterize the lactate and oxygen saturation of the venous-arterial circuit of the postoperative patient from cardiac surgery. Methods: Design: Analytical cross-sectional. In consecutive patients after cardiac surgery, serum lactate and oxygen saturation of the venous-arterial circuit were obtained. The variables were reported with median (25.75 percentiles). They were analyzed with Kruskal-Wallis ANOVA and respective adjustment, Spearman correlation, the descriptive Bland-Altman statistic and intraclass correlation coefficient (95% confidence interval). A p < 0.05 was considered significant. Results: 244 blood samples from 61 patients were studied. Women 30 (49%). (Oxygen saturation) [lactate] were: arterial 98 (95.3, 99.4%) and 1.7 (1.1, 2.1); peripheral venous 85 (75.4, 94%) and [1.9 (1.35, 2.3)]; central venous 68.8 (58.74, 70.2%) and 1.8 (1.3, 2.3); mixed central venous 66.8 (61.2, 73.1%) and 1.8 (1.3, 2.2), p < 0.05. The best intraclass correlation coefficient for oxygen saturation were from central vein to mixed central vein 0.856 (0.760,0.914); and lactate: 0.954 (0.923, 0.972). Conclusions: The oxygen saturation differs in the venous-arterial circuit unlike lactate where they are similar. The best values of the intraclass correlation coefficient for lactate and oxygen saturation were those obtained in central vein and mixed central vein.

Relation between Pulse Oximetry and the Clinical Profile of Children with Pneumonia

Background: Failure to seek early care and delays in hospital diagnosis are commonly acknowledged determinants of mortality in childhood pneumonia with a higher proportion specially in under developed countries like Bangladesh. Rather than detecting pneumonia by only signs, pulse oximetry may be a useful tool in ensuring the most efficient use of oxygen therapy, which is especially important in resource-limited settings. The aim of this study was to assess the relation between pulse oximetry and the clinical profile of children with pneumonia.Material & Methods:This cross-sectional type of descriptive study was conducted in Department of Pediatric, Rangpur Medical Collage and Hospital, Rangpur from July 2014 to June 2016. This study was carried out on 205 Children aged 2-59 months suffering from pneumonia inpatient and outpatient of Pediatric department.Results:It was observed that majority (91.7%) patients had cough184(89.8%) had breathing difficulty and 173(84.4%) patients had fast breathing. It was observed that majority (92.2%) patients had ability to cry while examined. Majority (90.7%) patients had crepitations. Three (1.5%) patients was found pallor of palms, 178 (86.8%) patients were heart rate ?100 beats per minute, 196(95.6%) were capillary refill time <3 second, 4(2.0%) hepatomegaly >2 cm and 131(63.9%) had temperature ? 38 °C. It was observed that Hypoxemia (?90%) was found 51(24.9%) of the patients. The mean SpO2 was found 88.6±4.7 percent with range from 70 to 99 percent.Conclusions:Cough, breathing difficulty and fast breathing are most common signs of children with pneumonia. Through pulse oximetry test, the prevalence of hypoxaemia was found in 24.9% children.

Effect of dental tissue thickness on the measurement of oxygen saturation by two different pulse oximeters

Abstract This study aimed to evaluate the influence of different dental tissue thickness on the measurement of oxygen saturation (SpO2) levels in high (HP) and low (LP) blood perfusion by comparing the values obtained from two different pulse oximeters (POs) - BCI and Sense 10. Thirty freshly extracted human teeth had their crowns interposed between the POs and an optical simulator, which emulated the SpO2 and heart beats per minute (bpm) at HP (100% SpO2/75 bpm) and LP (86% SpO2/75 bpm) modes. Afterwards, the palatine/lingual surfaces of the dental crowns were worn with diamond drills. The reading of SpO2 was performed again using the POs alternately through the buccal surface of each dental crown. Data were analyzed by the Wilcoxon, Mann-Whitney and Kendall Tau-b tests (α=5%). The results showed significant difference at the HP and LP modes in the SpO2 readouts through the different dental thicknesses with the use of BCI, and at the LP mode with the use of Sense 10, which had a significant linear correlation (p<0.0001) and lower SpO2 readout values in relation to the increase of the dental thickness. Irrespective of tooth thickness, Sense 10 had significantly higher readout values (p<0.0001) than BCI at both perfusion modes. The interposition of different thicknesses of enamel and dentin influenced the POs measurement of SpO2, specially at the low perfusion mode. The POs were more accurate in SpO2 measurement when simulated perfusion levels were higher.

Resumo Este estudo avaliou a influência de diferentes espessuras de esmalte e dentina na medição dos níveis de saturação de oxigênio (SpO2) em alta (HP) e baixa (LP) perfusão sanguínea, comparando os valores obtidos em dois oxímetros de pulso (OPs) diferentes, BCI e Sense 10. Trinta dentes recém-extraídos de humanos tiveram suas coroas interpostas entre os OPs e um simulador óptico, que simulava a SpO2 e os batimentos cardíacos por minuto (bpm) nos modos de HP (100% SpO2 / 75 bpm) e LP (86% SpO2 / 75 bpm). Após, as superfícies palatinas / linguais dos dentes foram desgastadas com brocas de diamantadas. A leitura da SpO2 foi realizada novamente usando os dois OPs alternadamente através da face vestibular de cada coroa dental. Os dados foram analisados ​​pelos testes Wilcoxon, Mann-Whitney e Kendall Tau-b (α = 5%). Os resultados mostraram diferença significativa nos modos HP e LP nas leituras de SpO2 através das diferentes espessuras dentárias com o uso do BCI, e no modo LP com o uso do Sense 10, que teve correlação linear significativa (p <0,0001) e menores valores de leitura de SpO2 em relação ao aumento da espessura dentária. Independentemente da espessura do dente, o Sense 10 apresentou valores de leitura significativamente maiores (p <0,0001) do que o BCI em ambos os modos de perfusão. A interposição de diferentes espessuras de esmalte e dentina influenciaram a mensuração da SpO2 pelos OPs, especialmente no modo de baixa perfusão. Os POs foram mais precisos na mensuração da SpO2 quando os níveis simulados de perfusão foram maiores.

Importancia clínica del diagnóstico de la metahemoglobinemia / Clinical importance of the diagnosis of methemoglobinemia

Introducción: La metahemoglobina es una forma de hemoglobina en la que el grupo hemo, usualmente en forma ferrosa, es oxidado a forma férrica, lo que afecta el transporte de oxígeno. El incremento por encima de los valores de referencia se denomina metahemoglobinemia. Objetivo: Actualizar conceptos como prevención, manifestaciones clínicas, diagnóstico de laboratorio y tratamiento de elección de esta enfermedad, con la información disponible de la última década. Métodos: Se realizó una revisión de la literatura en inglés y español, a través del sitio web PubMed, el motor de búsqueda Google académico y Scielo, de artículos publicados en los últimos 10 años. Los términos de búsqueda usados incluyeron metahemoglobinemia, déficit de citocromo b5 reductasa, cianosis y cooximetría. Análisis y síntesis de la información: La metahemoglobinemia se puede clasificar en congénita y adquirida, esta última es la más frecuente. Es importante el diagnóstico de esta enfermedad que aunque es un padecimiento poco común, puede cursar con complicaciones graves e incluso la muerte. Puede ser evitable con diagnóstico temprano y tratamiento oportuno para reducir las complicaciones asociadas a este cuadro. Conclusiones: El diagnóstico y el tratamiento, profiláctico y terapéutico de la metahemoglobinemia en su etapa aguda o de mantenimiento, requieren la adecuada actualización del profesional de la salud(AU)

Introduction: Methemoglobin is a form of hemoglobin in which the heme group, usually in the ferrous form, is oxidized to the ferric form, which affects oxygen transport. The increase above the reference values ​​is called methemoglobinemia. Objective: To update concepts such as prevention, clinical manifestations, laboratory diagnosis and treatment of choice for this disease, with the information available from the last decade. Methods: A review of the literature in English and Spanish was carried out, through the PubMed website, the academic Google search engine and Scielo database, of articles published in the last 10 years. Search terms used included methemoglobinemia, cytochrome b5 reductase deficiency, cyanosis, and co-oximetry. Analysis and synthesis of information: Methemoglobinemia can be classified into congenital and acquired, the latter being the most common. It is important to diagnose this disease, which, although it is a rare condition, can cause serious complications, and even death, which are avoidable with early diagnosis and timely treatment that reduce the complications associated with this condition. Conclusions: The diagnosis and treatment, prophylactic and therapeutic, of methemoglobinemia, in its acute or maintenance stage, require adequate updating of the health professional(AU)

Efficacious Continuous Monitoring of Infants Using Wireless Remote Monitoring Technology

Objective To compare postductal heart rate and saturation (SpO2) measurements from the wireless PO device obtained by iVital+against measurements by the standard Masimo (SET technology) monitor in the monitoring of neonates. Methods Pulse oximetry reading of newborns were assessed in terms of heart rate and saturations with two PO simultaneously attached to postductal site and data comparison was done. Results Out of the 1000 cumulative recordings, the mean diference between HR obtained from both PO was 0.415 and level of agreement was 2.3 beats per minute. For SpO2 mean diference between devices was 1.21 and level of agreement was 1.5%. There was very little diference between SpO2 measurements when the Masimo SpO2 was?70%. Conclusion As this pulse oximeter is small, portable and accuracy is as comparable to Masimo, this provides a good solution for efcaciously monitoring neonates. It can also be used in the monitoring of children with suspected or afected with COVID-19 in hospital and ICU settings as also in the quarantine facilities. This reduces the need for constant presence of medical and nursing personnel.

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.

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.

Justificativa e limitações da SpO2/FiO2 como possível substituta da PaO2/FiO2 em diferentes cenários pré-clínicos e clínicos / Rationale and limitations of the SpO2/FiO2 as a possible substitute for PaO2/FiO2 in different preclinical and clinical scenarios

RESUMO Embora a PaO2/FiO2 derivada da gasometria arterial continue sendo o padrão-ouro do diagnóstico de insuficiência respiratória aguda, a SpO2/FiO2 tem sido investigada como potencial substituta. Esta revisão narrativa apresenta o estado da literatura pré-clínica e clínica sobre a SpO2/FiO2 como possível substituta da PaO2/FiO2 e para uso como marcador diagnóstico e prognóstico; ainda, é fornecida uma visão geral da oximetria de pulso e suas limitações, além da avaliação da utilidade da SpO2/ FiO2 como substituta da PaO2/FiO2 em pacientes com COVID-19. Ao todo, foram encontrados 49 estudos comparando SpO2/FiO2 e PaO2/ FiO2 com base em uma estratégia de pesquisa mínima. A maioria dos estudos foi realizada em recémnascidos, alguns foram realizados em adultos com síndrome do desconforto respiratório agudo, e outros foram realizados em outros cenários clínicos (incluindo poucos em pacientes com COVID-19). Há certa evidência de que os critérios de SpO2/FiO2 podem substituir a PaO2/FiO2 em diferentes cenários clínicos. Isso é reforçado pelo fato de que devem ser evitados procedimentos invasivos desnecessários em pacientes com insuficiência respiratória aguda. É inegável que os oxímetros de pulso estão cada vez mais difundidos e podem proporcionar um monitoramento sem custos. Portanto, substituir a PaO2/FiO2 pela SpO2/FiO2 pode permitir que instalações com recursos limitados diagnostiquem a insuficiência respiratória aguda de maneira objetiva.

ABSTRACT Although the PaO 2/FiO 2 derived from arterial blood gas analysis remains the gold standard for the diagnosis of acute respiratory failure, the SpO2/FiO2 has been investigated as a potential substitute. The current narrative review presents the state of the preclinical and clinical literature on the SpO2/FiO2 as a possible substitute for PaO2/FiO2 and for use as a diagnostic and prognostic marker; provides an overview of pulse oximetry and its limitations, and assesses the utility of SpO2/ FiO2 as a surrogate for PaO2/FiO2 in COVID-19 patients. Overall, 49 studies comparing SpO2/FiO2 and PaO2/FiO2 were found according to a minimal search strategy. Most were conducted on neonates, some were conducted on adults with acute respiratory distress syndrome, and a few were conducted in other clinical scenarios (including a very few on COVID-19 patients). There is some evidence that the SpO2/ FiO2 criteria can be a surrogate for PaO2/FiO2 in different clinical scenarios. This is reinforced by the fact that unnecessary invasive procedures should be avoided in patients with acute respiratory failure. It is undeniable that pulse oximeters are becoming increasingly widespread and can provide costless monitoring. Hence, replacing PaO2/FiO2 with SpO2/FiO2may allow resourcelimited facilities to objectively diagnose acute respiratory failure.

Oxygen Saturation in Neonate after Birth

Background: Oxygen saturation measures the quantity of haemoglobin in the blood that is saturated with oxygen. Hemoglobin is a component of red blood cells that binds oxygen and transports it to outlying tissues. Oxygen is commonly used throughout the world in neonatal units. Injudicious use of Oxygen may not maintain appropriate oxygen status rather can lead to hypoxemia or hyperoxemia, both of the conditions are injurious to neonatal health. Objective: To assess the oxygen saturation in neonate after birth.Methods:A cross-sectional study conducted in the Department of Neonatology BSMMU, Shahbag, Dhaka, Lab Aid Specialized Hospital, Dhaka, Bangladesh from October 2013 to March 2014. A total 317 patients were selected according to selection criteria. The parents were interviewed with a specific pre-designed and pre-tested questionnaire and some information were gathered by document review. All neonate both term and late preterm (?34weeks) who would not be anticipated for resuscitation was included.Results:A total 317 neonate were selected according to selection criteria. Among the study subjects more than half were male (57.1%). Rests were female (42.9%). Average gestational age of the study subjects was 37.47� 1.16 (SD) with the range of 34-40. On the other hand average birth weight was 2.88�46 (SD) with the minimum birth weight 2.0 kg and maximum weight 4.2 kg. Illustrates the median (IQR) heart rate from one to ten min for preterm versus term births. At one to three minutes and at five minutes after birth preterm infants had significantly lower SpO2 measurements. From six to 10 minutes after birth and four minutes after birth there was no significant difference between SpO2 measurements for mode of delivery. Paired sample t test showed that average SpO2 was less in 1 minute[88.42�8(SD)] than in 5 minute [94.25�5(SD)] and statistically this differences were highly significant (t=24.44, p=0.000). Pearson correlation showed high positive correlation (p=0.000) and correlation co-efficient r=0.479. Correlation was significant at the 0.01 level.Conclusion:It is 搉ormal� to have low oxygen saturation measurements in the first minutes after birth. It takes time for infants to reach oxygen saturation levels described as 搉ormal� in the later postnatal period. Oxygen saturation increased with time i.e., it was more in 5 minutes than in 1 minute and similarly more in 10 minutes than in 5 minutes. Conversely heart rate was found more in one minute than to five and ten minutes. Oxygen saturation was ? 90% within 3 to 4 minutes. Significant changes were found in Oxygen saturation by mode of delivery in three minutes & in heart rate by two minutes after birth. At one to ten minutes after birth preterm infants had lower SpO2 measurements.