If you or your sisters have not been evaluated by a sleep specialist, this may be the next logical step. Even though I am using the CPAP, I am still waking up quite often. I am still feeling very tired and sleepy during the day. A repeat sleep study while on nasal CPAP may be necessary. This occurs when other activities are prioritized over sleep.
Disordered sleep leads to poor health and increased risk of accidents.
Even short periods of sleep deprivation can have an impact on performance. For instance, sleeping only five hours a night for two consecutive nights significantly impairs a person's level of alertness and vigilance, and worsens math ability and creative thinking. Such hours are not uncommon to those employees working the graveyard shift. Much of the sleepiness in our culture is self-inflicted. The average number of hours worked in America has increased by one full time month of work each year.