Cobertura para el diagnóstico y tratamiento de la apnea obstructiva del sueño en Latinoamérica: reporte del Foro Latinoamericano de Sociedades Respiratorias / Coverage for the Diagnosis and Treatment of Obstructive Sleep Apnea in Latin America: Report from the Latin American Forum of Respiratory Societies

Introducción: La Apnea Obstructiva del Sueño (AOS) es un problema de salud pública en Latinoamérica; una región que es heterogénea, con recursos diferentes y sistemas de salud diversos. El objetivo fue describir la información recabada por el Foro Latino-americano de Sociedades Respiratorias sobre el acceso y cobertura para los estudios diagnósticos y tratamiento con CPAP de los pacientes con AOS. Material y Métodos: A través de la Asociación Latinoamericana de Tórax (ALAT), se envió una encuesta a todas las sociedades miembros con preguntas sobre el acceso a diagnóstico, tratamiento y cobertura de seguros privados. Resultados: El foro contó con 15 países. Se reportó la existencia de 396 unidades formales de sueño, 82% privadas y 18% públicas; en 12 países el sistema de salud público (SSP) contrata unidades privadas para otorgar servicios. En todos los países se realiza tanto polisomnografía como poligrafía respiratoria para el diagnóstico. En 8 (53%) países, el SSP cubre el tratamiento con CPAP de la AOS (en Argentina, Guatemala y México esta cobertura es parcial); los seguros privados cubren AOS en 7/15 países. Conclusiones: En Latinoamérica, existen pocas unidades formales de sueño y la mayoría son privadas. Cerca de la mitad de los sistemas de salud pública no cubren su tratamiento y, en la mayoría de los casos, los seguros privados no ofrecen cobertura. Esto deja a nuestra población vulnerable a las complicaciones de la AOS, con un concomitante aumento de la morbimortalidad y costos en salud.

Introduction: Obstructive Sleep Apnea (OSA) is a public health problem in Latin America, which is a heterogeneous region, with different resources and diverse health systems. The objective was to describe the information collected by the Latin American Forum of Respiratory Societies on access and coverage for diagnostic studies and CPAP treatment of patients with OSA. Methods: Through the Latin American Thorax Association (ALAT, Spanish acronym), a survey was sent to all member societies with questions about access to diagnosis, treatment, and private insurance coverage. Results: The forum included 15 countries. The existence of 396 sleep medicine units was reported, 82% private and 18% public; in 12/15 countries the public health system (PHS) contracts private units to provide services. In all countries, both polysomnography and respiratory polygraphy are performed to make the diagnosis. In only 8 (53%) countries the PHS covers the treatment of OSA (in Argentina, Guatemala and Mexico this coverage is partial); private insurance coverage is in 7/15 countries.Conclusions: In Latin America there are few formal sleep units and most are private. About half of public health systems do not cover their treatment and, in most cases, private insurance does not offer coverage. This leaves our population vulnerable to the complications of OSA, with a concomitant increase in morbidity, mortality and health costs.

Siniestralidad y apnea obstructiva del sueño. Revisión de la literatura y evaluación de la situación en 3 países latinoamericanos / Accident Rate and Obstructive Sleep Apnea: Literature Review and Assessment of the Situation in Three Latin American Countries

La apnea obstructiva del sueño (AOS) es una condición común en adultos en edad laboral. Incluso, en la actualidad, vemos cómo la edad de retiro se ha ido prolongando de tal manera que adultos mayores, quienes tienen mayor prevalencia de AOS, continúan trabajando incluso en situaciones de alto riesgo de siniestralidad. Uno de los principales síntomas de la AOS es la somnolencia diurna que puede contri- buir de manera directa al riesgo de accidentabilidad, compromiso cognitivo y desem- peño laboral. También se ha demostrado cómo la reducción de la materia gris a nivel cerebral y cerebelar provoca alteraciones en coordinación y capacidad de conducción. El tratamiento con dispositivos de presión positiva mejora el desempeño laboral y redu- ce la incidencia de accidentes de tránsito, pero algunos déficits cognitivos pueden per- sistir incluso después de meses de tratamiento. La evaluación del riesgo de accidentabilidad en conductores es un desafío y los cues- tionarios actuales no son adecuados para el cribado. Los simuladores de conducción y las pruebas de alerta son más prometedores. El futuro de la investigación se centra en estandarizar los resultados de los simulado- res, determinar los mejores predictores de eventos reales y utilizar la inteligencia arti- ficial y los automóviles autónomos para reducir los riesgos relacionados con la somno - lencia al volante. Es necesario que la posición de los entes gubernamentales de nuestros países latinoa- mericanos sea proactiva y orientada a la protección de la salud y la seguridad de la po- blación.

Obstructive sleep apnea (OSA) is a common condition among working-age adults. In today's context, we observe that the retirement age has been extended, with older adults, who have a higher prevalence of OSA, continuing to work even in high-risk situations. One of the main symptoms of OSA is daytime sleepiness, which can directly contribu- te to the risk of accidents, cognitive impairment and reduced work performance. It has also been demonstrated that the reduction of gray matter in the brain, especially in the cerebellum, can lead to coordination and driving capacity impairments. Treatment with positive pressure devices improves work performance and reduces the incidence of traffic accidents, but some cognitive deficits may persist even after months of treatment. Assessing the risk of accidents in drivers is a challenge, and current questionnaires are not suitable for screening. Driving simulators and alertness tests show more promise. The future of research is focused on standardizing simulator outcomes, identifying the best predictors of real-world events, and utilizing artificial intelligence and autonomous vehicles to mitigate risks associated with driver drowsiness. It is imperative that the stance of government entities in our Latin American countries is proactive and aimed at safeguarding the health and safety of the population.

Effect of pulmonary hypertension on exercise capacity and gas exchange in patients with chronic obstructive pulmonary disease living at high altitude.

BACKGROUND: Pulmonary hypertension (PH) is associated with decreased exercise tolerance in chronic obstructive pulmonary disease (COPD) patients, but in the altitude the response to exercise in those patients is unknown. Our objective was to compare exercise capacity, gas exchange and ventilatory alterations between COPD patients with PH (COPD-PH) and without PH (COPD-nonPH) residents at high altitude (2640 m). METHODS: One hundred thirty-two COPD-nonPH, 82 COPD-PH, and 47 controls were included. Dyspnea by Borg scale, oxygen consumption (VO2), work rate (WR), ventilatory equivalents (VE/VCO2), dead space to tidal volume ratio (VD/VT), alveolar-arterial oxygen tension gradient (AaPO2), and arterial-end-tidal carbon dioxide pressure gradient (Pa-ETCO2) were measurement during a cardiopulmonary exercise test. For comparison of variables between groups, Kruskal-Wallis or one-way ANOVA tests were used, and stepwise regression analysis to test the association between PH and exercise capacity. RESULTS: All COPD patients had a lower exercise capacity and higher PaCO2, A-aPO2 and VD/VT than controls. The VO2 % predicted (61.3 ± 20.6 vs 75.3 ± 17.9; p < 0.001) and WR % predicted (65.3 ± 17.9 vs 75.3 ± 17.9; p < 0.001) were lower in COPD-PH than in COPD-nonPH. At peak exercise, dyspnea was higher in COPD-PH (p = 0.011). During exercise, in COPD-PH, the PaO2 was lower (p < 0.001), and AaPO2 (p < 0.001), Pa-ETCO2 (p = 0.033), VE/VCO2 (p = 0.019), and VD/VT (p = 0.007) were higher than in COPD-nonPH. In the multivariate analysis, PH was significantly associated with lower peak VO2 and WR (p < 0.001). CONCLUSION: In COPD patients residing at high altitude, the presence of PH was an independent factor related to the exercise capacity. Also, in COPD-PH patients there were more dyspnea and alterations in gas exchange during the exercise than in those without PH.

Impacto clínico de un grupo de discusión multidisciplinaria en el diagnóstico de fibrosis pulmonar idiopática en Colombia / Clinical impact of a multidisciplinary discussion group on the diagnosis of idiopathic pulmonary fibrosis in Colombia

Resumen Introducción: la fibrosis pulmonar idiopática (FPI) es una enfermedad pulmonar intersticial (EPID) de mal pronóstico, considerada huérfana en Colombia. Un diagnóstico correcto tiene implicaciones para el paciente y los costos de atención. Los grupos de discusión multidisciplinaria (GDM) se consideran el estándar de oro en el diagnóstico. No hay estudios previos en Colombia de la experiencia de un GDM. Objetivos: evaluar el impacto de un GDM en una institución de cuarto nivel en Bogotá en cambio de diagnóstico de pacientes con EPID y la concordancia entre el diagnóstico inicial y final de FPI. Material y métodos: pacientes con EPID evaluados entre 2015-2018 por el GDM conformado por neumólogos, radiólogo, patólogo y reumatólogos. Criterios ATS/ERS/JRS/ALAT de diagnóstico de FPI. Descripción del cambio en el diagnóstico y concordancia entre el diagnóstico inicial y del GDM en FPI. Resultados: de 165 pacientes con EPID se cambió el diagnóstico en 35.2%. En 77.3% pacientes con diagnóstico inicial de FPI y en 6.7% con diagnóstico inicial diferente a FPI el GDM confirmó FPI. Al descartar FPI, los principales diagnósticos fueron neumonitis de hipersensibilidad en fase crónica (29.4%) y neumonía intersticial no específica (23.5%). El índice kappa entre el diagnóstico inicial y final de FPI fue 0.71 (0.60-0.82). Conclusiones: el GDM en EPID tuvo un importante impacto clínico demostrado por un alto porcentaje de cambió del diagnóstico de remisión. Se descartó el diagnóstico inicial de FPI en un porcentaje significativo de pacientes y se ratificó en un grupo menor sin esta sospecha clínica inicial. (Acta Med Colomb 2022; 47. DOI:https://doi.org/10.36104/amc.2022.2017).

Abstract Introduction: idiopathic pulmonary fibrosis (IPF) is an interstitial lung disease (ILD) with a poor prognosis, considered an orphan disease in Colombia. An accurate diagnosis has implications for the patient and healthcare costs. Multidisciplinary discussion groups (MDGs) are considered the gold standard for diagnosis. There are no prior studies in Colombia on the experience of an MDG. Objectives: to evaluate the impact of an MDG in a quaternary care institution in Bogotá on the change in the diagnosis of patients with ILD and the concordance between the initial and final diagnosis of IPF. Materials and methods: patents with ILD evaluated from 2015-2018 by the MDG made up of pulmonologists, a radiologist, a pathologist and rheumatologists. The ATS/ERS/JRS/ALAT diagnostic criteria for IPF. A description of changes in the diagnosis and the agreement between the initial diagnosis and the MDG diagnosis of IPF. Results: out of 165 patients with ILD, the diagnosis was changed in 32.5%. The MDG confirmed IPF in 77.3% of patients with an initial diagnosis of ILD and 6.7% of those with a different initial diagnosis. When IPF was ruled out, the main diagnoses were chronic hypersensitivity pneumonitis (24.8%) and nonspecific interstitial pneumonia (23.5%). The Kappa index between the initial and final IPF diagnoses was 0.71 (0.60-0.82). Conclusions: the MDG on ILD had a significant clinical impact evidenced by a high percentage of change in the referral diagnosis. The initial diagnosis of IPF was ruled out in a significant percentage of patients and confirmed in a smaller group which did not have this initial clinical suspicion. (Acta Med Colomb 2022; 47. DOI:https://doi.org/10.36104/amc.2022.2017).

Radiological and histological characteristics of patients with interstitial lung disease undergoing lung biopsy in a reference institution from eastern Colombia / Características radiológicas e histológicas de pacientes con enfermedad pulmonar intersticial llevados a biopsia pulmonar en una institución del oriente colombiano

Abstract Introduction: Interstitial lung disease (ILD) diagnosis requires a mukidisciplinary approach and, in some cases, lung biopsy. Objective: To describe the sociodemographic and clinical characteristics, as well as the radiological and histological findings, of patients with ILD who required lung biopsy after a mukidisciplinary board (pneumology, radiology, and pathology) of a reference center for respiratory diseases in Bucaramanga, Colombia, failed to reach the ILD diagnosis. Materials and methods: Cross-sectional study. The medical records of 56 patients treated at the Instituto Neumológico del Oriente who underwent lung biopsy between 2015 and 2019 were reviewed. Measures of central tendency and dispersion were calculated for demographic and clinical variables, respectively, to characterize them. A bivariate analysis was performed using Fisher's exact test to determine whether there were differences in the distribution of the sociodemographic and clinical variables according to the radiological patterns and the final histological diagnosis. Results: Participants' median age was 67 years (IQR: 59-72) and 55.35% were men. 43 patients had a radiological pattern inconsistent with usual interstitial pneumonia (UIP); 4 had a pattern consistent with possible UIP; and 9 had a pattern consistent with UIP. The most common histologic diagnoses were hypersensitivity pneumonitis (HP) (32.14%), nonspecific interstitial pneumonia (NSIP) (17.86%), and UIP (19.64%). Conclusion: In the study population, the primary reason for performing a lung biopsy was the presence of a radiologic pattern inconsistent with UIP, with HP being the predominant histopathological diagnosis. This is the first study to characterize patients with ILD who underwent lung biopsy in eastern Colombia, making a significant contribution to our understanding of the disease's epidemiology in the country.

Resumen Introducción. El diagnóstico de la enfermedad pulmonar intersticial (EPI) requiere un enfoque multidisciplinar y, en ocasiones, de una biopsia pulmonar. Objetivo. Describir las características sociodemográficas y clínicas, y los hallazgos radiológicos e histológicos de pacientes con EPI que requirieron biopsia pulmonar luego de no lograrse un diagnóstico de esta enfermedad por la junta médica multidisciplinar (neumología, radiología y patología) de un centro de referencia en enfermedades respiratorias de Bucaramanga, Colombia. Materiales y métodos. Estudio transversal. Se revisaron las historias clínicas de 56 pacientes atendidos en el Instituto Neumológico del Oriente y que fueron remitidos a biopsia pulmonar entre 2015 y 2019. Se analizaron variables demográficas y clínicas, calculando medidas de tendencia central y de dispersión para su respectiva caracterización. Se realizó un análisis bivariado mediante test exacto de Fisher para determinar si existían diferencias en la distribución de las variables sociodemográficas y clínicas de acuerdo con los patrones radiológicos y el diagnóstico histológico definitivo. Resultados. La mediana de edad fue 67 años (RIC: 59-72), 55.35% fueron hombres. 43 pacientes presentaron patrón radiológico inconsistente con neumonía intersticial usual (NIU); 4, patrón de posible NIU y, 9, patrón de NIU. Los diagnósticos histológicos más frecuentes fueron neumonitis por hipersensibilidad (NH) (32.14%), neumonía intersticial no específica (17.86%) y NIU (19.64%). Conclusión. La principal razón para realizar biopsia pulmonar en la población de estudio fue la presencia de un patrón radiológico inconsistente con NIU, siendo la NH el principal diagnóstico histopatológico. Este es el primer trabajo que caracteriza a pacientes con EPI del oriente colombiano llevados a biopsia pulmonar, lo que representa un importante aporte al conocimiento de la epidemiología de esta enfermedad en Colombia.

Severe sleep apnea, Cheyne-Stokes respiration and desaturation in patients with decompensated heart failure at high altitude.

OBJECTIVES: To determine the sleep-disordered breathing in patients with decompensated HF (DHF) at an altitude of 2640m. METHODS: Polysomnogram during the first 48 hours of admission in patients hospitalized for DHF. Sleep apnea (SA) was defined as an apnea hypopnea index (AHI) > 5/hour and central sleep apnea (CSA) as central apnea index (CAI) ≥ 50% of the AHI. RESULTS: Sixteen participants, LVEF 24.2±9.9%. All patients had SA, severe in 12 (75%), CSA in 8 (50%) and 7 (43.8%) presented Cheyne-Stokes respiration (CSR). Out of the eight patients with obstructive SA, five had a central component (CAI ≥ 5/h). The SpO2 decreased during sleep to 80.6±5.5% and in patients with CSR to 77.6±6.9%. CONCLUSIONS: At an altitude of 2640m all patients with DHF presented sleep apnea, most were severe, with CSA and a significant percentage of CSR that was associated with higher oxygen desaturation.

Prevalence of central sleep apnea during continous positive airway pressure (CPAP) titration in subjects with obstructive sleep apnea syndrome at an altitude of 2640 m.

BACKGROUND: The occurrence of central apneas when applying positive pressure (CPAP) to patients with obstructive sleep apnea syndrome (OSAS) is called complex sleep apnea (CompSA). This causes poor adherence to CPAP and persistence of symptoms. In Bogota, a city located at an altitude of 2640 m above sea level, chronic hypoxemia can generate certain instability of the respiratory system during sleep which could increase the presence of central apnea. The aim was to establish the prevalence of central apnea (central apnea index >5/h) in adults with moderate or severe OSAS during CPAP titration, and the factors associated with this. METHOD: Patients over 18 years old with OSAS were referred to the Fundacion Neumologica Colombiana Sleep Center, from January 2008 to June 2010. Polysomnogram (PSG) for CPAP titration was performed according to the American Academy of Sleep Medicine criteria. The prevalence was calculated and the clinical and baseline PSG factors associated with the CompSA were analyzed. RESULTS: We included 988 patients, 58% men. CompSA prevalence was 11.6%. Factors associated with CompSA were: central apneas in the baseline PSG (OR: 5.34 [3.49-8.16]), history of heart failure (OR: 2.53 [1.58-4.07]), and male sex (OR: 1.68 [1.06-2.69]). CONCLUSION: The prevalence of complex sleep apnea in Bogota (11.6%) was intermediate compared to the reported in lower altitudes. The factors associated with the development of CompSA were male sex, heart failure, and the presence of central apnea in the baseline PSG.