Sleep Apnea Support Group
Sleep apnea is a common sleep disorder characterized by brief interruptions of breathing during sleep. People with sleep apnea partially awaken as they struggle to breathe, but in the morning they may not be aware of sleep disturbances.
you obviously need for him to do an overnight sleep study
If your a nurse, perhaps ask around in the medical community. There are sleep studies that can be done at your home that cost less than one done at a sleep clinic.
Good luck.