A member asked:

I'm having the camera put down my throat and the letter i got said don't wear nail varnish why is this?

2 doctors weighed in across 2 answers

Monitoring: They will need to monitor your oxygen level during the procedure. They usually do this by placing a device on one of your fingers. Nail polish will interfere with the reading.

Answered 4/6/2013

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Dr. Charles Davant answered

Specializes in Family Medicine

Oxygen: You will be asleep and they will put a sensor on your finger to monitor your oxygen lever--that way they can be sure you'll wake up. You.

Answered 8/19/2013

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