Before surgery · Breathing & sleep
Sleep Apnea & CPAP Before Surgery
If you have sleep apnea — or snore heavily and suspect you might — it's genuinely important information for your anesthesia team. It changes how they manage your airway, your anesthetic and your monitoring afterward. And yes: bring your CPAP.
The short answer
Why sleep apnea matters for your operation
In obstructive sleep apnea, the soft tissues of the throat relax and block the airway during sleep. Anesthesia and strong painkillers relax those same tissues — so people with sleep apnea are more likely to have breathing pauses and dips in oxygen, especially in the first day or two after surgery. Knowing in advance lets the team plan a safer airway, anesthetic and recovery.
Bring your CPAP
- Pack the machine and your mask, labelled with your name.
- Know your pressure setting if you can (it's stored on the device).
- Staff often have you use it in recovery and overnight — your own machine at your own settings is best.
- Tell the team at check-in, even if you mentioned it at your pre-op visit.
Undiagnosed but suspected?
You don't need a formal diagnosis to flag it. The warning signs anesthetists screen for are loud snoring, gasping or choking in your sleep, witnessed pauses in breathing, feeling unrefreshed, and daytime sleepiness — along with higher blood pressure, a larger neck and older age. If several of these sound like you, say so. It's far better caught before surgery.
Be cautious with strong painkillers afterward
Frequently asked questions
Should I bring my CPAP machine to hospital?
Yes — bring the machine and your mask, labelled with your name. Staff often use it in recovery and overnight, and using your own familiar settings is safest. Tell the team you use CPAP as soon as you arrive (and ideally at your pre-op assessment).
Why does sleep apnea matter for anesthesia?
People with sleep apnea have airways that are more prone to collapsing, and they're often more sensitive to the sedatives and strong painkillers used around surgery. That raises the risk of breathing pauses and low oxygen afterward, so the team plans the airway, anesthetic and monitoring with extra care.
I'm not diagnosed but I snore badly — should I say something?
Absolutely. Loud snoring, choking or gasping in your sleep, witnessed pauses in breathing, and daytime sleepiness are the classic clues (the basis of the STOP-BANG screen anesthetists use). Mention them — undiagnosed sleep apnea is exactly what your team wants to catch before, not after.
Will I need to stay in longer because of sleep apnea?
Sometimes. Because the risk of breathing problems is highest in the first day or two, your team may monitor your oxygen more closely, be cautious with strong opioids, or keep you in a little longer. It's a safety measure, not a complication.