TY - JOUR T1 - Erythrocytosis in patients with obstructive sleep apnea JF - European Respiratory Journal JO - Eur Respir J VL - 44 IS - Suppl 58 SP - P2210 AU - Paola Arrieta Narváez AU - Carolina Jurkojc Mohrenberger AU - Eva Mañas Baena AU - Carolina Gotera Rivera AU - Rosa Mirambeaux Villalona AU - Patricia Lazo Meneses AU - Deisy Barrios Barreto AU - Esteban Perez Rodriguez AU - Javier Garcia de Leaniz Y1 - 2014/09/01 UR - http://erj.ersjournals.com/content/44/Suppl_58/P2210.abstract N2 - Introduction: polycythemia is characterized by an increase in number of red blood cells and/or the amount of hemoglobin (Hb) per unit volume of blood. the most appropriate hematological parameter for assessment is the hematocrit (HTC). Secondary polycythemia is characterized by increased erythropoiesis stimulating factor (EPO), being normal erythrocyte precursors in the bone marrow. The obstructive sleep apnea syndrome (OSAS) is characterized by intermittent hypoxia occur during sleep and can cause secondary polycythemia.Objective: Evaluate patients received in the unit of sleep disordered breathing referred from hematology department (HDp) for suspected OSAS and polycythemia, having discarded polycythemia vera.Material and Methods: We analyzed data from 20 patients referred from HDp for secondary polycythemia and suspected OSAS during 2012-2013.Results: of the 20 patients, all were male. The mean eye was 64.5(SD13.6). The mean body mass index was 33(SD4.6). HCT average was 52(SD2.5) and the mean Hb 18(SD0.6). OSAS was diagnosed in 85% of studied patients. The mean respiratory disturbance index (RDI) was 32.7(SD25.6). The minimum was 0.7 and the maximum 81. Half of the patients had severe OSASView this table:Table 1: Results of the polygraph in patients with secondary polycythemiaThe nocturnal oximetry profile presented with an average of 41% T90%(SD35) and middle desaturation index 34.4/h(DT25).Conclusion: In patients referred from hematology with no primary polycythemia, OSAS is confirmed, mostly predominantly obstructive with nocturnal oximetry impact. It is essential to rule out OSAS in patients with secondary polycythemia. ER -