title: [Development of apparatus for remote personal vital status monitoring and positioning].
abstract: OBJECTIVE
  To develop a wireless apparatus for remote physiological monitoring and positioning of the personnel which can be utilized in searching and implementing emergency care for the wounded in the battlefield.
  
  
  METHODS
  The heart rate was obtained from electrocardiogram, and body temperature was measured by using a temperature crystal. Positioning of the personnel was realized with the assistance of global positioning system, and wireless transmission of physiological and position data accomplished by way of spread spectrum communication chip set.
  
  
  RESULTS
  Data transmission by spread spectrum communication covered a distance as far as 1 kilometer, and the error was controlled below 100 m in positioning. In the span of 30 to 250 beats/min, the heart rate error was less than 1 beat/min, and the body temperature error less than 0.1 degrees celsius in the span of 25 to 45 degrees celsius.
  
  
  CONCLUSIONS
  This wireless device meets the demands of spread spectrum transfer of physiological and position data at the distance of 1 kilometer.
authors.affiliation: Department of Biomedical Engineering, First Military Medical University, Guangzhou 510515, China.
authors.forename: Jin-Song
authors.initials: JS
authors.lastname: Guo
authors.forename: Qin-Kai
authors.initials: QK
authors.lastname: Deng
authors.forename: Jian
authors.initials: J
authors.lastname: Gong
mesh_terms: D001831:Body Temperature; D006339:Heart Rate; D006801:Humans; D008991:Monitoring, Physiologic; D019114:Remote Consultation / Q000379:methods