Laying in the recovery area I sneezed, hard, five times. My right nostril burned. I pulled the oxygen off and asked my husband what the O2 measurement showed on the monitor above my head. “94% – it just dropped 3%”. I took deep breaths and the number popped back up. As my nurse walked into the room, I requested removing the oxygen measuring device from my finger. She said “Let me get one more set of vitals”. I sneezed a few more times, my nose running and burning.
Coming home that afternoon after my colonoscopy I continued to sneeze, the burning sensation in my right nostril got worse and the runny nose persisted. It was time to do what any competent physician (or e-patient would do) – I googled it. Apparently this is a common problem after colonoscopy these days. It turns out that with the addition of using propofol for colonoscopies, anesthesiologists insist that a high flow rate of oxygen be used during the procedure to reduce hypoxia (a low oxygen level) and the use of capnography, or measurement of carbon dioxide retention. In order to do this, as best that I can ascertain, they pump oxygen in one nostril and measure CO2 in the other. That’s a lot of hi-flow oxygen going into one nostril through a nasal cannula. There are studies related to the irritation this causes in patients as well as a reduction in patient satisfaction. It’s day three after my colonoscopy and I am still sneezing, my nose still burns and I still have a fair amount of rhinitis. Yeah, I’d say that’s a dissatisfier.
Just a heads-up to my patients about to undergo your routine endoscopy. The misery may not end once your bowels are back to normal. Take plenty of kleenex.
1. Li N-L, Tseng S-C, Hsu C-C, et al. A simple, innovative way to reduce rhinitis symptoms after sedation during endoscopy. Canadian Journal of Gastroenterology. 2011;25(2):68-72. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3043006/by