By the time you read this blog post, I’ll be en route to Las Vegas for a nurse practitioner convention and fun in the sun.  I’ve had a cold for the past week, and I’m praying the air travel doesn’t rupture my eardrums.  I have notoriously small Eustachian tubes and normally have difficulty clearing my ears.  I ruptured my eardrums once on a flight to Florida in high school, and I have a little PTSD from the experience.  I’m taking…