A joint replacement is a life-changing procedure, but for up to 4% of patients, a dangerous complication lurks: Periprosthetic Joint Infection (PJI). Today's diagnostic methods are too slow, often taking days to confirm an infection. This critical delay leads to severe patient outcomes, including multiple surgeries, prolonged pain, and staggering healthcare costs exceeding €35,000 for a single complex case. Surgeons are forced to make irreversible decisions in the operating room with incomplete information. We believe there is a better way.