Sensor device-maker Gentag is commercializing a disposable “skin patch” that looks like an ordinary bandage. Targeted to orthopedic surgery patients, it enables the patient to self-monitor during recovery as long as they have an RFID enabled cell phone. The patch combines advanced MEMS sensors with Gentag’s disposable wireless sensor platform. Gentag has already developed other disposable diagnostic patches, including devices for fever and diabetes monitoring. Article.