Title :
Leadless transducers for cardiotocographs
Author :
Taylor, J. ; Hayes-Gill, B.R. ; Paul, C.J. ; Crowe, J.A.
Author_Institution :
Dept. of Electr. & Electron. Eng., Nottingham Univ., UK
fDate :
31 Oct-3 Nov 1996
Abstract :
Patient objection to monitoring during labour has led to a desire for leadless transducers for cardiotocographs (CTGs). This paper describes how radio telemetry has been used to convert an existing Doppler ultrasound based CTG into a leadless version. The use of radio has necessitated compression of the transmitted Doppler audio signal and a medium access control protocol in order to accommodate multiple CTGs. The encoder/decoder and protocol controller have been implemented on an 8 bit microcontroller. The protocol has a capacity for at least 12 CTGs with each transducer having a reliable range of around 20 m and a battery life of around 14 hours. Results show no noticeable degradation in CTG performance
Keywords :
acoustic signal processing; audio coding; biomedical electronics; biomedical telemetry; computerised monitoring; data compression; echocardiography; medical signal processing; patient monitoring; time division multiplexing; 20 m; Doppler ultrasound based; cardiotocographs; compression; encoder/decoder; leadless transducers; medium access control protocol; microcontroller; protocol controller; radio telemetry; transmitted Doppler audio signal; Access protocols; Batteries; Cardiography; Decoding; Media Access Protocol; Microcontrollers; Patient monitoring; Telemetry; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.656961
