Final answer:
The (A) glucose test result can be affected by the use of povidone iodine to cleanse the site for a dermal procedure because the iodine can act as a reducing agent and interfere with glucose measurements.
Step-by-step explanation:
When povidone iodine is used to cleanse a site for a dermal procedure, the test result that can be affected is the measurement of glucose. Povidone iodine contains iodine, which has the potential to interfere with certain tests, especially those that rely on the reducing properties of glucose. The commonly used Folin-Wu method for the estimation of blood glucose in diagnostic laboratories is particularly susceptible to interference by other reducing substances present in the blood, including iodine. Therefore, using povidone iodine as a skin antiseptic could potentially introduce extra reducing agents into the sample, leading to an inaccurately high glucose reading.
For this reason, an alcohol-based cleanser is often recommended for use before blood glucose testing to avoid such interference. However, blood urea nitrogen (BUN), potassium, and coagulation studies are not typically affected by povidone iodine application.