How To Prepare

Tell your doctor if you:

• Have taken aspirin recently.
• Are taking any medicines that can delay blood clotting, including nonsteroidal anti-inflammatory drugs (NSAIDs, such as ibuprofen, naproxen, or etodolac) or warfarin (Coumadin).
• Are allergic to any medicines, including anesthetics.
• Have any bleeding problems.
• Are or might be pregnant.

Talk to your doctor about any concerns you have about the need for the test, its risks, how it will be done, or what the results will mean. To help you understand the importance of this test, fill out the medical test information form(What is a PDF document?).