Implantable sensors are devices placed inside the body — embedded or implanted into the human body — to detect, diagnose, or monitor medical conditions. These systems are capable of long-term monitoring, influencing vital functions, and delivering treatment. Implantable sensors provide valuable data about various parts of the body, such as gastrointestinal indicators (temperature, pH level, and pressure), blood glucose levels, blood pressure, and electrocardiogram (ECG) readings. For example, a small implantable sensor can be used to monitor nerves, muscles, or internal organs.<br /><br />Similarly, implantable devices equipped with accelerometers or piezoelectric sensors can be used as cochlear implants for hearing aids. Another study suggests using a spiral sensor made of silicone fiber/hydrogel, based on a triboelectric nanogenerator, to monitor ligament strain. In addition to being used in the arm and eye, a glucose sensor can be implanted in the fat layer between the skin and muscle to monitor tissue glucose levels.<br /><br />However, the biocompatibility of implantable devices and the safety of the user must be carefully considered before using such devices.<br /><br />Although not yet fully implantable, the field of smart dust is emerging — including body dust and neural dust — for monitoring the internal organs of the human body. This technology uses millimeter-sized particles to sense, process, and communicate body data, and can be safely injected into the human body for precise diagnostics.<br /><br />AL-mustaqbal university the top one in iraq