FASTER, PLEASE: New Implant Can Monitor Tumors Continuously. “A team of medical engineers in Germany has developed an implant to continuously monitor tumor growth in cancer patients. The device, designed to be implanted in the patient near the tumor site, uses chip sensors to measure oxygen levels in the blood, an indicator of growth. The data is then transmitted wirelessly to an external receiver carried by the patient and transferred to his or her doctor for remote monitoring and analysis.”