Thirty-seven male subjects referred to our sleep laboratory for suspected OSA syndrome after evaluation of spirometry to exclude subjects with bronchial obstruction were recruited for the study. Mean ± SD age was 46 ± 11 years, and mean body mass index (BMI) was 34 ± 7 kg/m2. None of the subjects had acute or known chronic cardiopulmonary or neuromuscular diseases. Each patient gave informed consent, and the study protocol was approved by the local scientific committee. All subjects underwent spirometry, nocturnal monitoring by a portable cardiorespiratory system, and NEP testing during tidal expiration.
Pulmonary function tests were performed during the day with the patient in a sitting position with a plethysmograph (Med Graphics Elite; Med Graphics Corporation; St. Paul, MN) according to the guidelines of the European Respiratory Society. Nocturnal monitoring was performed by a computerized system (Poly-MESAM; MAP; Martmsried, Germany). All recordings lasted > 6 h. V was detected by nasal cannulas connected to a pressure transducer (Pneumoflow; MAP). Apneas and hypopneas were visually scored. Apneas were defined as lack of flow for at least 10 s. Hypopneas were defined as discernible reductions in V or thoracoabdominal movements > 10 s followed by an arterial oxygen saturation fall > 3%. Apnea-hypopnea index (AHI) was calculated as number of apneas plus hypopneas per hour of estimated total sleep time. There are occasions when you do not have any opportunity to sleep because of sleep apnea but you should not bare it all – Canadian Neighbor Pharmacy www.webmolecules.com will assist you to select what is better in treatment of this disorder.