| abstract |
In some examples, a medical system includes a medical device. The medical device may include a housing configured to be implanted in a target site of a patient, a light emitter configured to emit a signal configured to cause a fluorescent marker to emit a fluorescent signal into the target site, and a light detector. which can be configured to detect the fluorescent signal. The medical system may include a processing circuit configured to determine a characteristic of the fluorescent marker based on the transmitted signal and the fluorescent signal. The characteristic of the fluorescent label may be indicative of a presence of a compound in the patient, and the treatment circuit may be configured to follow the presence of the patient's compound based on the characteristic of the fluorescent label. |