Understanding Your Laboratory Test: What This Test Is and What to Expect

This is a laboratory test that examines a small sample from your body, helping your doctor learn important details about your health, such as how well certain organs are functioning or whether an illness or infection may be present.

This test cultures (grows) bacteria from a sample taken from an implanted medical device, such as an artificial hip or knee joint, heart valve, pacemaker, or other implanted hardware. The test uses aerobic culture methods, which means it grows bacteria in the presence of oxygen. By identifying the specific type of bacteria present, doctors can determine the best treatment for the infection.

Your doctor orders this test to help diagnose a medical condition, monitor a health problem you already have, check how well your current treatment is working, or screen for possible issues before any symptoms have appeared.

This test is performed when a patient with an implanted device shows signs of infection, such as redness, swelling, pain, warmth, or fluid drainage around the device. It helps doctors confirm whether an infection is present and identify the exact bacteria causing it, so they can prescribe the most effective antibiotic.

A trained healthcare professional will collect your sample, most often by drawing a small amount of blood from a vein in your arm, though some tests may require a urine sample or a gentle swab from the affected area.

A healthcare provider will collect fluid or tissue samples from around the implanted device using a sterile needle or during a minor surgical procedure. The area will be cleaned with antiseptic to prevent contamination. The sample is then sent to a laboratory for culture and analysis.