Why Remove Gel Nails and Jewelry Before Surgery?
The pulse oximeter reads through your fingernail and thick gel can block it; metal jewelry risks pressure injury and interferes with surgical equipment.
During anesthesia a clip on your fingertip shines light through the nail to track blood oxygen continuously. Thick or opaque gel, acrylics, and dark polish can degrade that signal, so clinics ask for at least one or two bare nails — often all of them. Jewelry comes off for different reasons: electrosurgical equipment, pressure points during a long operation, and finger swelling that can trap a ring.
What counts as jewelry here
The list is broader than rings and necklaces: piercings anywhere on the body, hairpins, magnetic lashes, smartwatches, and some hair extensions with metal fittings. Contact lenses come out too, since eyes are taped shut under general anesthesia and lenses can irritate the cornea.
Monitoring setups and equipment differ between hospitals, so the exact nail and piercing rules vary — some accept a light nude polish, others want everything off. Check the specifics at the pre-operative consult so you are not removing a soldered piercing in the waiting room.
MediIndex articles are for general information only and are not medical advice, diagnosis, or advertising. Outcomes vary by individual — consult a board-certified specialist for personal decisions.