Monitoring of the Bone Free Flaps With Microdialysis

When surgeons reconstruct parts of the head and neck after cancer surgery or trauma, they often use "free flaps" — pieces of bone and tissue taken from another part of the body (such as the fibula in the leg or the iliac crest in the hip). Monitoring whether this transplanted tissue stays alive and healthy is critical in the days after surgery. This study examines whether a technique called microdialysis — which measures chemical changes in the tissue — can reliably detect early signs that the flap is failing. Early detection of flap complications can make the difference between saving and losing the transplanted tissue, and ultimately between a successful reconstruction and a devastating setback for the patient. You may be eligible if: - You are an adult (18 or older) - You are undergoing head and neck reconstruction using an iliac crest or fibula free flap - You are covered by national health insurance - You have signed informed consent You may NOT be eligible if: - You are a minor (under 18) - You are having head and neck reconstruction with a different type of free flap - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.