Somnotouch nibp device

The polysomnographic analysis was performed using the SOMNOtouchTM® NIBP device (SOMNOmedics Italia, Bellusco, Italy) and a complete cardiorespiratory night monitoring was carried out for at least 8 h. During polysomnography peripheral, blood oxygen saturation, respiratory flow in the upper airway, respiratory movements of the chest and abdomen, snoring phases, the position of the patient, blood pressure and electrocardiogram with acquisition of peripheral signals were recorded. The recorded layout and thus the criterion for assigning hypopneas scoring was automatically analyzed by the DOMINO software®, validated by SOMNOmedics, and subsequently it was manually validated by an expert operator according to the most recent American Academy of Sleep Medicine (AASM) criteria [37 (link)]. The anthropometric data included age, height and weight. The polysomnographic data encompassed Apnea Hypopnea Index (AHI), minimum percentage oxyhaemoglobin saturation (mSaO2%), mean percentage oxyhaemoglobin saturation (meanSaO2%), percentage of time with oxyhaemoglobin saturation percentage less than 90 (TS < 90%) and number of desaturations with oxyhaemoglobin saturation < 90% (nSaO2 < 90%).

The cardiorespiratory sleep study was performed using the SOMNOtouchTM® NIBP device (SOMNOmedics Italia), for at least 8 h per night. Peripheral oxygen saturation, respiratory flow in the upper airways, respiratory movements of the chest and abdomen, snoring phases, sleeping position, blood pressure levels, and ECG were recorded. These data were automatically analyzed by the DOMINO software® and subsequently validated by an expert operator according to the most recent American Academy of Sleep Medicine Reviewer criteria [11 (link)]. The polysomnographic data encompassed Apnea Hypopnea Index (AHI), minimum percentage oxyhemoglobin saturation (mSaO2%), mean percentage oxyhemoglobin saturation (meanSaO2%), percentage of time with oxyhemoglobin saturation percentage less than 90 (TS < 90%), and number of desaturations with oxyhemoglobin saturation < 90% (nSaO2 < 90%). We were unable to detect peripheral oxygen saturation of 13 participants. In this study, OSA was considered to be present in patients with an AHI of 15 or more events/h [11 (link)].