Continuous Monitoring of Pulse Oximetry During the 6-Minute Walk Test Improves Clinical Outcomes Prediction in COPD.

BACKGROUND: Continuous monitoring of SpO2 throughout the 6-min walk test (6MWT) unveiled that some patients with respiratory diseases may present values across the test lower than SpO2 measured at the end of the test. Nevertheless, it remains unclear whether this approach improves the yield of walk-induced desaturation detection in predicting mortality and hospitalizations in patients with COPD. METHODS: Four hundred twenty-one subjects (51% males) with mild-very severe COPD underwent a 6MWT with continuous measurement of SpO2 . Exercise desaturation was defined as a fall in SpO2 ≥ 4%. All-cause mortality was assessed up to 6 y of follow-up and the rate of hospitalizations in the year succeeding the 6MWT. RESULTS: One hundred forty-nine subjects (35.4%) died during a mean (interquartile) follow-up of 55.5 (30.2-64.1) months. Desaturation was observed in 299/421 (71.0%). SpO2 along the test was < end SpO2 (88 [82-92]% vs 90 [84-93]%, P < .001). Desaturation detected only during (but not at the end of) the test was found in 81/421 (19.2%) participants. Multivariate Cox regression model adjusted for sex, body composition, FEV1, residual volume/total lung capacity ratio, walk distance, O2 supplementation during the test, and comorbidities retained the presence of desaturation either at the end (1.85 [95% CI 1.02-3.36]) or only along the test (2.08 [95% CI 1.09-4.01]) as significant predictors of mortality. The rate of hospitalizations was higher in those presenting with any kind of desaturation compared to those without exercise desaturation. Logistic regression analysis revealed that walking interruption and diffusing capacity of the lung for carbon monoxide predicted desaturation observed only during the test. CONCLUSIONS: O2 desaturation missed by end-exercise SpO2 but exposed by measurements during the test was independently associated with all-cause mortality and hospitalizations in subjects with COPD.

Effectiveness of an adapted diving mask (Owner mask) for non-invasive ventilation in the COVID-19 pandemic scenario: study protocol for a randomized clinical trial.

BACKGROUND: Non-invasive ventilation (NIV) is indicated to avoid orotracheal intubation (OTI) to reduce hospital stay and mortality. Patients infected by SARS-CoV2 can progress to respiratory failure (RF); however, in the initial phase, they can be submitted to oxygen therapy and NIV. Such resources can produce aerosol and can cause a high risk of contagion to health professionals. Safe NIV strategies are sought, and therefore, the authors adapted diving masks to be used as NIV masks (called an Owner mask). OBJECTIVE: To assess the Owner mask safety and effectiveness regarding conventional orofacial mask for patients in respiratory failure with and without confirmation or suspicion of COVID-19. METHODS: A Brazilian multicentric study to assess patients admitted to the intensive care unit regarding their clinical, sociodemographic and anthropometric data. The primary outcome will be the rate of tracheal intubation, and secondary outcomes will include in-hospital mortality, the difference in PaO2/FiO2 ratio and PaCO2 levels, time in the intensive care unit and hospitalization time, adverse effects, degree of comfort and level of satisfaction of the mask use, success rate of NIV (not progressing to OTI), and behavior of the ventilatory variables obtained in NIV with an Owner mask and with a conventional face mask. Patients with COVID-19 and clinical signs indicative of RF will be submitted to NIV with an Owner mask [NIV Owner COVID Group (n = 63)] or with a conventional orofacial mask [NIV orofacial COVID Group (n = 63)], and those patients in RF due to causes not related to COVID-19 will be allocated into the NIV Owner Non-COVID Group (n = 97) or to the NIV Orofacial Non-COVID Group (n = 97) in a randomized way, which will total 383 patients, admitting 20% for loss to follow-up. DISCUSSION: This is the first randomized and controlled trial during the COVID-19 pandemic about the safety and effectiveness of the Owner mask compared to the conventional orofacial mask. Experimental studies have shown that the Owner mask enables adequate sealing on the patient's face and the present study is relevant as it aims to minimize the aerosolization of the virus in the environment and improve the safety of health professionals. TRIAL REGISTRATION: Brazilian Registry of Clinical Trials (ReBEC): RBR - 7xmbgsz . Registered on 15 April 2021.

Effects of the mandibular advancement device on daytime sleepiness, quality of life and polysomnographic profile of public transport drivers with obstructive sleep apnea syndrome.

OBJECTIVE: To evaluate the effects of the mandibular advancement device (MAD) on daytime sleepiness, quality of life (QoL) and polysomnographic profile of intercity transport drivers with obstructive sleep apnea syndrome (OSAS). MATERIAL AND METHODS: A quasi-experimental study evaluating intercity transport drivers from March to September 2019. The apnea-hypopnea index (AHI) was evaluated by type III polysomnography, which defined the severity of the disease. OSAS: mild (5 to 15), moderate (15 to 29), or severe (= 30). Sleepiness was assessed using the Epworth sleepiness scale, consisting of 8 questions about the likelihood of drowsiness in daily situations. QoL was assessed using the SF-36 questionnaire, which provides the score in eight domains: functional capacity, physical aspects, pain, general health status, vitality, social aspects, emotional aspects, and mental health. Drivers with OSAS underwent intervention with application of personalized MAD for 8 to 12 weeks. RESULTS: The total sample (n=23) (44.77±11.56 years) had a body mass index (BMI) of 30.64±4.66kg/m2, and an OSAS prevalence of 65.2% of drivers (n=15). There were losses of 4 drivers so that the final sample of drivers with OSAS for the intervention with the MAD was 11 individuals, with an average age of 45.54±9.41 years and BMI of 32.21±3.17kg/m². There was a decrease in AHI (28.51±15.66ev/h 012.11±6.70ev/h, p=0.002) and pain (60 (50-60)040 (40-50), p=0.015) after the intervention. CONCLUSION: There was a reduction in AHI in intercity transport drivers after implementing the MAD procedure.

Máscara de mergulho adaptada para ventilação não-invasiva e posição prona em paciente com COVID-19 grave: relato de caso / Diving mask adapted for non-invasive ventilation and prone position in a patient with severe covid-19: case report / Máscara de buceo adaptada para ventilación no invasiva y posición de prono en un paciente con covid-19 grave: reporte de caso

Justificativa e objetivos: Na busca de estratégias para o tratamento da insuficiência respiratória aguda causada pela COVID-19, surge a ventilação não invasiva (VNI) e o uso da posição prona em respiração espontânea. Objetiva-se apresentar o caso de uma paciente com COVID-19 grave admitida em unidade de terapia intensiva (UTI) e submetida à máscara de mergulho adaptada, que se configura em uma interface inovadora para VNI, bem como a posição prona. Métodos: Relato de caso de paciente hospitalizado diagnosticado com COVID-19 submetido à VNI precoce por meio da máscara de mergulho adaptada e uso da posição prona em respiração espontânea por 8 horas noturnas e 6 horas diurnas. Resultados: Paciente do sexo feminino, 56 anos, hipertensão arterial sistêmica e obesidade, apresentando tosse seca, odinofagia, fadiga e dispneia intensa na admissão. A tomografia de tórax demonstrou opacidades em vidro fosco bilaterais. A VNI foi instituída 1-2,75 vezes/dia, por 40-60 minutos, com pressão positiva ao final da expiração de 8 (7,25-8,00) cmH2O e pressão de suporte de 5,5 (4,00-6,00) cmH2O. Fuga aérea de 6 a 30%, com boa tolerância. A posição prona em respiração espontânea resultou em aumento da saturação periférica de oxigênio e redução do desconforto respiratório 30 minutos após. Conclusão: A associação do uso da VNI com máscara de mergulho adaptada e posição prona em respiração espontânea demonstrou ser eficaz em evitar a intubação orotraqueal de paciente com COVID-19 grave, ressaltando a importância da intervenção proposta.(AU)

Justification and objectives: In the search of strategies to treat acute respiratory failure caused by COVID-19, non-invasive ventilation (NIV) and the use of prone position in spontaneous breathing appear. The objective is to present the case of a patient with severe COVID-19 admitted to an intensive care unit (ICU) who used an adapted diving mask, which is configured as an innovative interface for NIV, and the prone position. Methods: Case report of a hospitalized patient diagnosed with COVID-19 who underwent early NIV by means of an adapted diving mask and the prone position during spontaneous breathing for 8 hours at night and 6 hours in the day. Results: Female patient, 56 years old, systemic arterial hypertension and obesity, with dry cough, odynophagia, fatigue and severe dyspnea on admission. Chest tomography with bilateral ground-glass opacities. Non-invasive ventilation was instituted 1-2.75 times/day, for 40-60 minutes, with positive pressure at the end of expiration of 8 (7.25-8.00) cmH2O and support pressure of 5.5 (4.00 -6.00) cmH2O. Air leaks of 6 to 30%, with good tolerance. The prone position during spontaneous breathing resulted in increased peripheral oxygen saturation and reduced respiratory discomfort 30 minutes later. Conclusion: The association of the use of NIV with an adapted diving mask and prone position during spontaneous breathing proved to be effective in preventing the orotracheal intubation of a patient with severe COVID-19, emphasizing the importance of the proposed intervention.(AU)

Justificación y objetivos: En la búsqueda de estrategias para el tratamiento de la insuficiencia respiratoria aguda causada por COVID-19, aparecen la ventilación no invasiva (VNI) y el uso de la posición de prono con la respiración espontánea. El objetivo es presentar el caso de un paciente con COVID-19 grave ingresado en una unidad de cuidados intensivos (UCI) que utilizó una máscara de buceo adaptada, que se configura como una interfaz innovadora para VNI, así como la posición de prono. Métodos: Reporte de caso de una paciente hospitalizada con diagnóstico de COVID-19 que fue sometida a VNI precoz mediante máscara de buceo adaptada y la posición de prono con respiración espontánea durante 8 horas en la noche y 6 horas en el día. Resultados: Paciente de sexo femenino, 56 años, hipertensión arterial sistémica y obesidad, con tos seca, odinofagia, fatiga y disnea severa al ingreso. Tomografía de tórax con opacidades bilaterales en vidrio esmerilado. La VNI se instituyó de 1 a 2,75 veces/día, durante 40-60 minutos, con presión positiva al final de la espiración de 8 (7,25-8,00) cmH2O y presión de soporte de 5,5 (4, 00 -6,00) cmH2O. Fugas de aire del 6 al 30%, con buena tolerancia. La posición de prono con respiración espontánea resultó en un aumento de la saturación de oxígeno periférico y una reducción de las molestias respiratorias 30 minutos después. Conclusión: La asociación del uso de VNI con máscara de buceo adaptada y la posición de prono con respiración espontánea demostró ser efectiva para prevenir la intubación orotraqueal de una paciente con COVID-19 severo, enfatizando la importancia de la intervención propuesta.(AU)

Sternocleidomastoid muscle activation following inspiratory muscle training in patients with chronic obstructive pulmonary disease: a randomized clinical trial / Ativação do músculo esternocleidomastoideo após treinamento muscular inspiratório em pacientes com doença pulmonar obstrutiva crônica: ensaio clínico randomizado / Activación del músculo esternocleidomastoideo tras el entrenamiento muscular inspiratorio de pacientes con enfermedad pulmonar obstructiva crónica: un ensayo clínico aleatorizado

ABSTRACT This study aims to assess the effect of short-time low frequency inspiratory muscle trainer (Threshold IMT) on inspiratory muscle strength and electromyographic activity of the sternocleidomastoid (SCM) muscle in people with chronic obstructive pulmonary disease (COPD). People with COPD participating in a lung rehabilitation program were allocated to a control or inspiratory muscle training (IMT) group. The control group participated in the usual rehabilitation, whereas the other group received IMT (performed with a load of 50% maximal inspiratory pressure (MIP) adjusted weekly). Both interventions lasted for 2 months. Outcomes included electromyographic analysis of the SCM and MIP. In total, ten participants were allocated to each group. The IMT group presented an increase in absolute (p<0.001) and predicted (p<0.001) values of MIP and also in pre- and post-intervention variation between groups (p=0.003 and p=0.008, respectively). Such differences were not found in the control group. The SCM muscle activity decreased in the IMT post intragroup evaluation (p=0.008). IMT provided a reduction of the electromyographic activity of SCM in COPD patients, also increasing inspiratory muscle strength in the study participants.

RESUMO O objetivo deste estudo foi avaliar o efeito do treinamento muscular inspiratório de baixa frequência de curta duração (Threshold TMI) na força muscular inspiratória e na atividade eletromiográfica do músculo esternocleidomastoideo (ME) em pessoas com doença pulmonar obstrutiva crônica (DPOC). Pessoas com DPOC que participam de um programa de reabilitação pulmonar foram alocadas em um grupo controle ou de treinamento muscular inspiratório (TMI). O grupo controle participou da reabilitação habitual, enquanto o grupo TMI também recebeu TMI, com carga de 50% da pressão inspiratória máxima (PImáx) ajustada semanalmente. Ambas as intervenções duraram 2 meses. Os resultados incluíram análise eletromiográfica do SCM e PImáx. Dez participantes foram alocados para o grupo controle e 10 para o grupo TMI. O grupo com TMI apresentou um aumento na PImáx nos valores absoluto (p<0,001) e previsto (p<0,001) e na variação pré e pós-intervenção entre os grupos (p=0,003 e p=0,008, respectivamente). Tais diferenças não foram encontradas no grupo controle. A atividade muscular do ME diminuiu no TMI após avaliação intragrupo (p=0,008). O TMI proporcionou redução da atividade eletromiográfica do ME em pacientes com DPOC, além de aumentar a força muscular inspiratória nos participantes do estudo.

RESUMEN El presente estudio tuvo como objetivo evaluar el efecto del entrenamiento muscular inspiratorio de baja frecuencia a corto plazo (Threshold TMI) sobre la fuerza muscular inspiratoria y la actividad electromiográfica del músculo esternocleidomastoideo (ME) en personas con enfermedad pulmonar obstructiva crónica (EPOC). Las personas con EPOC que participan en un programa de rehabilitación pulmonar se asignaron a un grupo control o de entrenamiento muscular inspiratorio (EMI). El grupo control participó en la rehabilitación habitual, mientras que el grupo de EMI también recibió EMI, con una carga del 50% de la presión inspiratoria máxima (PImáx) ajustada semanalmente. Ambas intervenciones tuvieron 2 meses de duración. Los resultados incluyeron el análisis electromiográfico de SCM y PImáx. Se asignaron 10 participantes al grupo control y 10 al grupo de EMI. El grupo de EMI tuvo un aumento de la PImáx en los valores absoluto (p<0,001) y predicho (p<0,001) y en la variación pre y posintervención entre grupos (p=0,003 y p=0,008, respectivamente). No se encontraron estas diferencias en el grupo control. La actividad muscular del ME disminuyó en el EMI después de la evaluación intragrupal (p=0,008). El EMI redujo la actividad electromiográfica del ME de pacientes con EPOC, además aumentó la fuerza muscular inspiratoria en los participantes del estudio.