Which condition can cause impaired readings on a pulse oximeter?

Nail polish can indeed cause impaired readings on a pulse oximeter. This device works by passing light through a vascular area, typically a fingertip or earlobe, to measure the oxygen saturation in the blood. Nail polish, particularly darker colors or even acrylic nails, can obstruct the light transmission necessary for the pulse oximeter to function properly. As a result, it may lead to inaccurately low readings of oxygen saturation, which can mislead healthcare providers. It's crucial for those administering pulse oximetry to check for these potential interferences to ensure accurate assessments of a patient's respiratory status.

High blood pressure, diabetes, and age may affect overall health and can have various impacts on a person's physiological state, but they do not directly influence the functioning of the pulse oximeter in the same way.