Do all of your doctors know about the therapy you use? If you are on CPAP or oxygen therapy, be sure to let all of your doctors know. Particularly if you have switched doctors since you were first diagnosed, they may not be aware of your condition. This becomes critical before surgery when you have sleep apnea, particularly for the recovery process when you will likely need to use your CPAP mask. Remember that not all surgeries are planned in advance
CPAP and oxygen therapy both have far-reaching, positive impacts on long term health. This can impact severity of other chronic diseases and your need for medications. Some people find their need for blood pressure medication diminishes.
In addition, your CPAP pressure needs may change over time. If you have gained or lost significant weight this could be the case for you. Make sure to maintain an active dialogue about your therapy with all of your clinicians.