Análisis coste-efectividad del tratamiento con presión positiva continua de la vía aérea en el síndrome de apnea-hipopnea durante el sueño (SAHS) moderado-grave / Cost-effectiveness of Continuous Positive Airway Pressure Treatment in Moderate-Severe Obstructive Sleep Apnea Syndrome

Introducción: El síndrome de apnea-hipopnea durante el sueño (SAHS) supone un gran impacto socioeconómico. El objetivo de este estudio es evaluar el coste-efectividad del tratamiento del SAHS con presión positiva continua de la vía aérea superior (CPAP) y estimar la influencia que tiene el cumplimiento de la CPAP. Métodos: Estudio retrospectivo de «casos cruzados» de 373 pacientes SAHS tratados con CPAP. Se calcularon variaciones en costes, puntuación en el test de Epworth y calidad de vida relacionada con la salud (cuestionario EQ-5D) entre el año previo al tratamiento y el año después del mismo. Se estimó la ratio de coste-efectividad incremental (RCEI) para el primer año de tratamiento y se realizó una proyección para el segundo año bajo distintos escenarios de efectividad y costes. Resultados: La puntuación de la escala visual analógica del cuestionario EQ-5D aumentó en 5 puntos y el test de Epworth disminuyó en 10 puntos al año del tratamiento con CPAP, con una ganancia media en años de vida ajustados por calidad (AVAC) de 0,05 por paciente y año (p < 0,001): 0,07 en cumplidores y -0,04 en no cumplidores. La RCEI fue de 51.147 €/AVAC durante el primer año de tratamiento con CPAP y de 1.544 €/AVAC el segundo año. Conclusión: El tratamiento con CPAP en pacientes con SAHS moderado-grave mejora la calidad de vida de los pacientes cumplidores y es coste-efectivo a partir del segundo año

Introduction: The socioeconomic impact of obstructive sleep apnea-hypopnea syndrome (OSAHS) is considerable. The aim of this study was to evaluate the cost-effectiveness of treating OSAHS with continuous positive airway pressure (CPAP) and the impact of CPAP compliance. Methods: This was a retrospective, case-crossover study of 373 patients with OSAHS receiving CPAP. We compared changes in costs, Epworth score and health-related quality of life (EQ-5D questionnaires) between the year before treatment and the year after treatment. The incremental cost-effectiveness ratio (ICER) for the first year of treatment was estimated, and projections were made for the second year, using different effectiveness and cost scenarios. Results: The visual analog scale score for the EQ-5D questionnaire increased by 5 points and the Epworth score fell by 10 points during the year of CPAP treatment. Mean gain in quality-adjusted life years (QALY) was 0.05 per patient per year (P < .001): 0.07 among compliers and -0.04 among non-compliers. ICER was €51,147/QALY during the first year of CPAP treatment and €1,544/QALY during the second year. Conclusion: CPAP treatment in patients with moderate-severe OSAHS improves the quality of life of compliant patients, and is cost-effective as of the second year

Noninvasive ventilation for severely acidotic patients in respiratory intermediate care units : Precision medicine in intermediate care units.

BACKGROUND: Severe acidosis can cause noninvasive ventilation (NIV) failure in chronic obstructive pulmonary disease (COPD) patients with acute hypercapnic respiratory failure (AHRF). NIV is therefore contraindicated outside of intensive care units (ICUs) in these patients. Less is known about NIV failure in patients with acute cardiogenic pulmonary edema (ACPE) and obesity hypoventilation syndrome (OHS). Therefore, the objective of the present study was to compare NIV failure rates between patients with severe and non-severe acidosis admitted to a respiratory intermediate care unit (RICU) with AHRF resulting from ACPE, COPD or OHS. METHODS: We prospectively included acidotic patients admitted to seven RICUs, where they were provided NIV as an initial ventilatory support measure. The clinical characteristics, pH evolutions, hospitalization or RICU stay durations and NIV failure rates were compared between patients with a pH ≥ 7.25 and a pH < 7.25. Logistic regression analysis was performed to determine the independent risk factors contributing to NIV failure. RESULTS: We included 969 patients (240 with ACPE, 540 with COPD and 189 with OHS). The baseline rates of severe acidosis were similar among the groups (45 % in the ACPE group, 41 % in the COPD group, and 38 % in the OHS group). Most of the patients with severe acidosis had increased disease severity compared with those with non-severe acidosis: the APACHE II scores were 21 ± 7.2 and 19 ± 5.8 for the ACPE patients (p < 0.05), 20 ± 5.7 and 19 ± 5.1 for the COPD patients (p < 0.01) and 18 ± 5.9 and 17 ± 4.7 for the OHS patients, respectively (NS). The patients with severe acidosis also exhibited worse arterial blood gas parameters: the PaCO2 levels were 87 ± 22 and 70 ± 15 in the ACPE patients (p < 0.001), 87 ± 21 and 76 ± 14 in the COPD patients, and 83 ± 17 and 74 ± 14 in the OHS patients (NS)., respectively Further, the patients with severe acidosis required a longer duration to achieve pH normalization than those with non-severe acidosis (patients with a normalized pH after the first hour: ACPE, 8 % vs. 43 %, p < 0.001; COPD, 11 % vs. 43 %, p < 0.001; and OHS, 13 % vs. 51 %, p < 0.001), and they had longer RICU stays, particularly those in the COPD group (ACPE, 4 ± 3.1 vs. 3.6 ± 2.5, NS; COPD, 5.1 ± 3 vs. 3.6 ± 2.1, p < 0.001; and OHS, 4.3 ± 2.6 vs. 3.7 ± 3.2, NS). The NIV failure rates were similar between the patients with severe and non-severe acidosis in the three disease groups (ACPE, 16 % vs. 12 %; COPD, 7 % vs. 7 %; and OHS, 11 % vs. 4 %). No common predictive factor for NIV failure was identified among the groups. CONCLUSIONS: ACPE, COPD and OHS patients with AHRF and severe acidosis (pH ≤ 7.25) who are admitted to an RICU can be successfully treated with NIV in these units. These results may be used to determine precise RICU admission criteria.

Efecto a largo plazo del tratamiento con presión positiva continua de la vía aérea sobre la arteriosclerosis subclínica en el síndrome de apnea-hipopnea durante el sueño / Long-term effects of continuous positive airway pressure treatment on subclinical atherosclerosis in obstructive sleep apnoea syndrome

Antecedentes y objetivo: El síndrome de apnea-hipopnea durante el sueño (SAHS) es un factor de riesgo de arteriosclerosis. Nuestro objetivo fue evaluar la arteriosclerosis subclínica en los pacientes con SAHS y el efecto del tratamiento con continuous positive airway pressure (CPAP, «presión positiva continua de la vía aérea superior») sobre el grosor íntima-media carotídeo (GIMc). Pacientes y método: Se incluyeron 125 pacientes con sospecha de SAHS. Después de la polisomnografía, 107 pacientes fueron diagnosticados de SAHS; 58 cumplían criterios de tratamiento con CPAP. El GIMc se midió mediante ecografía a nivel basal y a los 2 años de seguimiento en 50 pacientes con SAHS en tratamiento con CPAP y 35 SAHS sin criterio de CPAP. Resultados: Los valores del GIMc fueron superiores en los pacientes con SAHS respecto a los que no tenían SAHS (665 ± 120 frente a 581 ± 78 μm, p = 0,005), sin asociarse con su nivel de gravedad. La presencia de placas de ateroma fue más prevalente en los SAHS que en los no SAHS (48 frente a 2%, p = 0,004). En los pacientes con SAHS, la media del GIMc permaneció estable durante el seguimiento en el grupo sin CPAP, y en el grupo tratado con CPAP disminuyó significativamente (679 ± 122 frente a 631 ± 117 μm, p < 0,0001). Conclusiones: Los pacientes con SAHS presentan un mayor grado de arteriosclerosis subclínica y no se asocia con su gravedad. La ecografía carotídea en el SAHS es un marcador fiable de arteriosclerosis. El tratamiento con CPAP en el SAHS disminuye el GIMc y el riesgo cardiovascular (AU)

Background and objective: Obstructive sleep apnoea (OSA) is associated with an increased risk of cardiovascular disease. Our objective was to evaluate subclinical atherosclerosis in OSA patients and the effect of continuous positive airway pressure (CPAP) treatment on carotid intima-media thickness (cIMT). Patients and method: We included 125 patients with suspected OSA. After polysomnography, 107 patients were diagnosed with OSA; 58 of these met the criteria for CPAP treatment. cIMT was measured by ultrasonography at baseline in all patients and after 2 years of follow up in 50 patients on CPAP and 35 without CPAP treatment. ResultsThe average cIMT was significantly thicker in OSA than in non-OSA patients (665 ± 120 vs. 581 ± 78 μm, P = .005) and did not differ according to OSA severity. Atheromatous carotid plaque was more prevalent in OSA than non-OSA patients (48 vs. 2%, P = .004). Among OSA patients, the mean cIMT remained stable over time in the group without CPAP, whereas cIMT decreased markedly in the CPAP group (679 ± 122 vs. 631 ± 117 μm, P < .0001). Conclusions: Increased cIMT was associated with presence of OSA, but not with its severity. Carotid ultrasound in OSA is a reliable marker of atherosclerosis. CPAP treatment with CPAP in OSA reduces cIMT and cardiovascular risk (AU)

Redistribución de grasa intraabdominal en el tratamiento a largo plazo con presión positiva continua de la vía aérea en los pacientes con síndrome de apnea-hipopnea durante el sueño / Intraabdominal fat redistribution in long-term continuous positive airway pressure treatment in obstructive sleep apnea patients

Fundamento y objetivo: La obesidad es el principal factor de riesgo del síndrome de apneas-hipopneas del sueño (SAHS). El objetivo es evaluar el efecto de la continuous positive airway pressure (CPAP, «presión positiva continua de la vía aérea» a largo plazo en pacientes con SAHS sobre la grasa intraabdominal. Pacientes y métodos: Se incluyeron 50 pacientes SAHS con criterio de CPAP y 35 SAHS no candidatos a CPAP con un seguimiento de 2 años. El visceral adipose tissue (VAT, «tejido adiposo visceral»), el subcutaneous adipose tissue (SAT, «tejido adiposo subcutáneo») y la preaortic intraabdominal fat (PIF, «grasa intraabdominal preaórtica») se midieron mediante ecografía. Resultados: En el grupo SAHS no candidatos a CPAP, la media del SAT y del VAT no cambió durante el seguimiento, pero se observó un aumento del PIF (55,19 [23,44] frente a 63,45 [23,94] mm, p = 0,021). En los pacientes SAHS tratados con CPAP, la media del VAT y del PIF no se modificó, pero el SAT disminuyó a los 2 años del tratamiento con CPAP (11,29 [5,69] frente a 10,47 [5,71] mm, p = 0,012). Conclusiones: El tratamiento con CPAP a largo plazo en los pacientes SAHS produce una redistribución de la grasa intraabdominal y se asocia a un perfil antropométrico de menor riesgo cardiovascular (AU)

Background and objective: Obesity is the main risk factor for obstructive sleep apnoea (OSA). The aim was to evaluate the long-term effect of continuous positive airway pressure (CPAP) on intraabdominal fat distribution in OSA patients. Patients and methods: Fifty OSA patients with and 35 without CPAP treatment criteria were followed-up for 2 years. Visceral and subcutaneous adipose tissue (VAT and SAT) and preaortic intraabdominal fat (PIF) were assessed by sonography. Results: In the non CPAP treated group, SAT and VAT mean values didn’t change, while a significantly PIF growth was observed (55.19 [23.44] vs. 63.45 [23.94] mm, P = .021). In the CPAP treated group, VAT and PIF mean were not changed, while SAT decreased significantly (11.29 [5.69] vs. 10.47 [5.71] mm, P = .012). Conclusions: Long-term CPAP treatment produces intraabdominal fat redistribution and is associated with an anthropometric profile of lower cardiovascular risk in OSA patients (AU)

[Long-term effects of continuous positive airway pressure treatment on subclinical atherosclerosis in obstructive sleep apnoea syndrome]. / Efecto a largo plazo del tratamiento con presión positiva continua de la vía aérea sobre la arteriosclerosis subclínica en el síndrome de apnea-hipopnea durante el sueño.

BACKGROUND AND OBJECTIVE: Obstructive sleep apnoea (OSA) is associated with an increased risk of cardiovascular disease. Our objective was to evaluate subclinical atherosclerosis in OSA patients and the effect of continuous positive airway pressure (CPAP) treatment on carotid intima-media thickness (cIMT). PATIENTS AND METHOD: We included 125 patients with suspected OSA. After polysomnography, 107 patients were diagnosed with OSA; 58 of these met the criteria for CPAP treatment. cIMT was measured by ultrasonography at baseline in all patients and after 2 years of follow up in 50 patients on CPAP and 35 without CPAP treatment. RESULTS: The average cIMT was significantly thicker in OSA than in non-OSA patients (665±120 vs. 581±78µm, P=.005) and did not differ according to OSA severity. Atheromatous carotid plaque was more prevalent in OSA than non-OSA patients (48 vs. 2%, P=.004). Among OSA patients, the mean cIMT remained stable over time in the group without CPAP, whereas cIMT decreased markedly in the CPAP group (679±122 vs. 631±117µm, P<.0001). CONCLUSIONS: Increased cIMT was associated with presence of OSA, but not with its severity. Carotid ultrasound in OSA is a reliable marker of atherosclerosis. CPAP treatment with CPAP in OSA reduces cIMT and cardiovascular risk.

Cost-effectiveness of Continuous Positive Airway Pressure Treatment in Moderate-Severe Obstructive Sleep Apnea Syndrome. / Análisis coste-efectividad del tratamiento con presión positiva continua de la vía aérea en el síndrome de apnea-hipopnea durante el sueño (SAHS) moderado-grave.

INTRODUCTION: The socioeconomic impact of obstructive sleep apnea-hypopnea syndrome (OSAHS) is considerable. The aim of this study was to evaluate the cost-effectiveness of treating OSAHS with continuous positive airway pressure (CPAP) and the impact of CPAP compliance. METHODS: This was a retrospective, case-crossover study of 373 patients with OSAHS receiving CPAP. We compared changes in costs, Epworth score and health-related quality of life (EQ-5D questionnaires) between the year before treatment and the year after treatment. The incremental cost-effectiveness ratio (ICER) for the first year of treatment was estimated, and projections were made for the second year, using different effectiveness and cost scenarios. RESULTS: The visual analog scale score for the EQ-5D questionnaire increased by 5 points and the Epworth score fell by 10 points during the year of CPAP treatment. Mean gain in quality-adjusted life years (QALY) was 0.05 per patient per year (P<.001): 0.07 among compliers and -0.04 among non-compliers. ICER was €51,147/QALY during the first year of CPAP treatment and €1,544/QALY during the second year. CONCLUSION: CPAP treatment in patients with moderate-severe OSAHS improves the quality of life of compliant patients, and is cost-effective as of the second year.

[Intraabdominal fat redistribution in long-term continuous positive airway pressure treatment in obstructive sleep apnea patients]. / Redistribución de grasa intraabdominal en el tratamiento a largo plazo con presión positiva continua de la vía aérea en los pacientes con síndrome de apnea-hipopnea durante el sueño.

BACKGROUND AND OBJECTIVE: Obesity is the main risk factor for obstructive sleep apnoea (OSA). The aim was to evaluate the long-term effect of continuous positive airway pressure (CPAP) on intraabdominal fat distribution in OSA patients. PATIENTS AND METHODS: Fifty OSA patients with and 35 without CPAP treatment criteria were followed-up for 2 years. Visceral and subcutaneous adipose tissue (VAT and SAT) and preaortic intraabdominal fat (PIF) were assessed by sonography. RESULTS: In the non CPAP treated group, SAT and VAT mean values didn't change, while a significantly PIF growth was observed (55.19 [23.44] vs. 63.45 [23.94] mm, P=.021). In the CPAP treated group, VAT and PIF mean were not changed, while SAT decreased significantly (11.29 [5.69] vs. 10.47 [5.71] mm, P=.012). CONCLUSIONS: Long-term CPAP treatment produces intraabdominal fat redistribution and is associated with an anthropometric profile of lower cardiovascular risk in OSA patients.

Circulating FABP4 and FABP5 levels are differently linked to OSA severity and treatment.

OBJECTIVE: To evaluate circulating adipocyte and epidermal fatty acid-binding protein (FABP4 and FABP5) concentrations in patients with obstructive sleep apnea (OSA), as well as the effects of continuous positive airway pressure (CPAP) treatment. METHODS: Our cross-sectional study included 125 patients. After polysomnography, 58 participants met the criteria for CPAP treatment and were included in a closed cohort study of 8 weeks of CPAP treatment. General anthropometric and biochemical data and circulating FABP4 and FABP5 levels were determined in all patients at baseline and after CPAP treatment in those receiving this therapy. RESULTS: Circulating FABP4 but not FABP5 levels were higher in patients with OSA (P = 0.003). FABP4 but not FABP5 values were associated with parameters of OSA severity independently of age, gender, adiposity and insulin resistance (P < 0.05). FABP4 but not FABP5 concentrations were determinants of OSA presence (OR: 1.11, P = 0.010) and severity (OR: 1.06, P = 0.020). After CPAP treatment, FABP4 levels decreased in the more severe patients (P = 0.019), while FABP5 levels increased in all patients (P < 0.001). CONCLUSIONS: FABP4 is directly associated with obstructive sleep apnea severity and did not change with continuous positive airway pressure treatment, while FABP5 was not associated with obstructive sleep apnea severity and increased with continuous positive airway pressure treatment. FABP4 and FABP5 have different associations with obstructive sleep apnea. FABP4 but not FABP5 could be considered a marker of metabolic alterations in obstructive sleep apnea patients.