DESCRIPCIÓN DEL SÍNDROME DE SOBREPOSICIÓN (APNEA / HIPOPNEA OBSTRUCTIVA DEL SUEÑO -SAHS-) Y ENFERMEDAD PULMONAR OBSTRUCTIVA CRÓNICA (EPOC) EN UNA POBLACIÓN SELECCIONADA DE PACIENTES A DOS DIFERENTES ALTITUDES

Objective: To describe the architecture of sleep, breathing events and oxygenation in a selected population of patients with chronic obstructive pulmonary disease (COPD) and obstructive sleep apnoea-hypopnoea syndrome (OSAHS) in Burgos (800 m) and Bogota (2640 m). Methodology: Study, retrospective. Patients with a diagnosis of stable COPD who underwent a polysomnography at the Hospital Universitario de Burgos (HUBU) or Fundación Neumológica Colombiana (FNC). Databases of patients of both institutions, medical records and the results of baseline polysomnography, spirometry and arterial blood gases were reviewed, collecting variables related to sleep architecture, respiratory events and oxygenation. Results: Patients Burgos: n 17, 94.1% male, age 63.2 ± 8.8 years, BMI 31.28 ± 5.5 kg / m2. Spirometry FVC: 2.84 ± 0.9 liters (64.19 ± 17%), FEV1: 1.86 ± 0.7 liters (57.26 ± 18.2%), FEV1 / FVC 62.8 ± 6.6. Low sleep efficiency. Low percentage of NREM and REM. IAH 33.4 (IQR 16.2 to 65.2). Percentage of time with SpO2 <90%: 52.2 ± 35%. Oxygen desaturation index of 29 ± 19. Bogota patients: n 18, 55.6% male, age 69.1 ± 8.2 years. BMI 28.08 ± 4.1 kg / m2. FVC: 2.23 ± 0.7 liters (71.72 ± 12.1%), FEV1: 1.14 ± 0.49 liters (46.8 ± 13.2%), FEV1 / FVC 50.8 ± 9.9. Low sleep efficiency, low percentage of REM. IAH 19.3 (RIC 13 to 54.9). Percentage of time with SpO2