“…In a hospital, doctors and nurses are engaged in many parallel activities that involve a wide range of documents, charts, drugs, X-ray images, and blood samples. In an endeavor to enhance safety and efficiency in hospitals, research is being done in Radio Frequency Identification (RFID) applications in patient identification [1,2,3,8,9,10,11,15,18], drug adminstration [3,12], access to medical records [1,2,3], transfusion [5,6,7], and equipment, patient, and staff tracking [9,10,18,24].…”