Tham khảo tài liệu 'sustainable rfid solutions part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | RFID Applications for Sanitary Environments 189 Fig. 9. ISM frequencies for and Frequency for RFID and EAS Electronic Article Surveillanc only Intensity of magnetic field 60dBpA m at 10m Duty cycle No Restriction Channel spacing No spacing. RFID technology in the Healthcare is understudied yet but in the June 2008 an issue of the Journal of the American Medical Association JAMA Van Der Togt et al. 2008 reported results from a nonclinical study completed in the Netherlands in May of 2006 demonstrating that active and passive radio frequency identification RFID systems can be manipulated to produce electromagnetic interference EMI with medical devices commonly used in hospital critical care units . infusion pumps external pacemakers defibrillators monitors . The study was a non-clinical study in fact no patients were involved and the manner in which the tests were performed was not analogous to the way RFID systems are conventionally used in a modern hospital. Without a patient being connected EMI by 2 RFID systems active 125 kHz and passive 868 MHz was assessed under controlled conditions during May 2006 in the proximity of 41 medical devices in 17 categories 22 different manufacturers at the Academic Medical Centre University of Amsterdam Amsterdam The Netherlands. In 123 EMI tests 3 per medical device RFID induced 34 EMI incidents 22 were classified as hazardous 2 as significant and 10 as light. The passive 868MHz RFID signal induced a higher number of incidents 26 incidents in 41 EMI tests 63 190 Sustainable Radio Frequency Identification Solutions compared with the active 125-kHz RFID signal 8 incidents in 41 EMI tests 20 difference 44 95 confidence interval 27 -53 P .001 . The passive 868-MHz RFID signal induced EMI in 26 medical devices including 8 that were also affected by the active 125-kHz RFID signal 26 in 41 devices 63 . The median distance between the RFID reader and the medical device in all EMI incidents was 30 cm
