Nail Polish During Sedation: Why It's Restricted and How It Affects Monitoring

Patients are often asked to remove nail polish or wear only light-colored polish before sedation. Here's why:

1. Pulse Oximetry Accuracy: Pulse oximeters measure oxygen saturation by shining light through the fingertip. Dark or opaque nail polish can absorb or reflect light, leading to falsely low readings. Light-colored or clear polish minimizes interference.
2. Capillary Refill Assessment: Clinicians check capillary refill time by pressing the nail bed and observing color return. Polish, especially dark shades, can obscure this visual assessment, particularly in patients with darker skin tones.
3. Patient Identification: Some facilities use specific nail polish colors/patterns as an additional patient ID method during procedures with multiple sedated patients.
4. Standardization & Hygiene: Institutional policies may mandate bare nails or specific polish to ensure consistent monitoring and reduce infection risk from bacteria harbored under polish.

Follow your care team's pre-procedure instructions to ensure accurate monitoring and safety.