The phrase "awakening hours" is correct and usable in written English.
It can be used to refer to the time of day when someone is waking up or becoming alert, often associated with morning hours.
Example: "During the awakening hours, the city comes to life with the sounds of birds chirping and people starting their day."
Alternatives: "morning hours" or "waking hours".
Compared to healthy subjects, electroencephalogram (EEG) recordings, which allow to objectively assess sleep alterations, revealed that MD patients often suffer from insomnia and sleep fragmentation (i.e. increased time to fall asleep, frequent awakenings and early morning awakenings, some hours earlier than desired, with difficulty returning to sleep).
Finally, fewer patient-ventilator asynchronies were observed with PAV with fewer awakenings per hour [31].
The main abnormalities were a low percentage of rapid eye movement (REM) sleep, for a median 25th-75thh percentiles) of 11.5% (range, 8-20%) of total sleep, and a highly fragmented sleep with 25 arousals and awakenings per hour of sleep.
The sleep physiology of ICU patients indicates that whilst their TST is often normal (7 to 9 h) [2,14-17], sleep is highly fragmented with patients experiencing 6.2 awakenings per hour [2].
More specifically, PAV appeared superior to PSV in terms of decrease in arousals, improvement in sleep quality, decrease in amounts of arousals, awakenings per hour, and improved SWS and REM.
MoA children present a reduction of TIB (p < 0.001), SPT (p < 0.001), TST (p < 0.001) with an higher quote of awakenings per hour (p = 0.008) and a higher PLM index (p < 0.001) than controls.
The main abnormalities observed on each patient were a diminished percentage of REM sleep, counting for only 11.5% (range, 8-20%) of total sleep time, and a high fragmentation index with 25 arousals and awakenings per hour (range, 18-51).
Moreover, accordingly with Vendrame study results [38], our MoA children present a reduction in TIB (p < 0.001), SPT (p < 0.001), and TST (p < 0.001) with a higher quote of awakenings per hour (p = 0.008) and PLM index (p < 0.001) than controls.
The fragmentation index was different between the two ventilation modes, with 40 ± 20 arousals and awakenings per hour in PSV and 16 ± 9 during NAVA (p = 0.001; Figure 2 Sleep stage (percent of total sleep) during two ventilatory modes; Table 3).
Proportions of REM sleep duration were different in the two ventilatory modes (4.5% (range, 3-11%) in PSV and 16.5% (range, 13-29%) during NAVA (p = 0.001)), as well as the fragmentation index, with 40 ± 20 arousals and awakenings per hour in PSV and 16 ± 9 during NAVA (p = 0.001).
