title: Electromagnetic assessment of embedded micro antenna for a novel sphincter in the human body.
abstract: This paper presents a wireless, miniaturized, bi-directional telemetric artificial anal sphincter system that can be used for controlling patients' anal incontinence. The artificial anal sphincter system is mainly composed of an executive mechanism, a wireless power supply system and a wireless communication system. The wireless communication system consists of an internal RF transceiver, an internal RF antenna, a data transmission pathway, an external RF antenna and an external RF control transceiver. A micro NMHA (Normal Mode Helical Antenna) has been used for the transceiver of the internal wireless communication system and a quarter wave-length whip antenna of 7.75 cm has been used for the external wireless communication system. The RF carrier frequency of wireless communication is located in a license-free 433.1 MHz ISM (Industry, Science, and Medical) band. The radiation characteristics and SAR (Specific Absorption Rate) are evaluated using the finite difference time-domain method and 3D human body model. Results show that the SAR values of the antenna satisfy the ICNIRP (International Commission on Nonionizing Radiation Protection) limitations.
authors.affiliation: Department of Automation, College of Mechatronics Engineering and Automation, Shanghai University, Shanghai, PR China. zanpeng@shu.edu.cn
authors.forename: Peng
authors.initials: P
authors.lastname: Zan
authors.forename: Jinding
authors.initials: J
authors.lastname: Liu
authors.forename: Yutao
authors.initials: Y
authors.lastname: Ai
authors.forename: Enyu
authors.initials: E
authors.lastname: Jiang
mesh_terms: D000465:Algorithms; D001003:Anal Canal; D001187:Artificial Organs; D055590:Electromagnetic Phenomena; D006801:Humans; D008954:Models, Biological; D059015:Wireless Technology / Q000295:instrumentation*