I had one of my kidneys removed in March and have noticed an increase in Central Apneas. Is this a coincidence, or is having a nephrectomy and an increase in central apneas related? I have been using a CPAP since 2007, and my obstructive apneas are stable at under 5 per hour. My centrals vary from night to night (2-11 per hour). I messaged my sleep clinic, and they seem to be more concerned with the obstructive side and don’t think I need to do another sleep study. For background, I have Stage 3b CKD and High Blood Pressure. I know that having these conditions can lead to cardio problems. Am I overworrying about the increase in Central Apneas?