Hi. I don't have any experience with this, but as a basic place to start, have you spoken to your pulmonologist and the doctor who would be performing the biopsy? Typically you would require medical clearance before going through any kind of surgery. I think your pulmonologist would be more familiar with the impact of thyroid surgery on asthma -- you are not the first in this situation, I am sure -- so they can best advise you in how to care for yourself before/after the biopsy.
What do you think? Do you have a scheduled date for the biopsy? Please know we are here to support you throughout this process and I'm sending you all the best! Hoping with you for benign results. Keep us updated. -Melissa, team member