TITLE:
Design of a Noninvasive Bladder Urinary Volume Monitoring System Based on Bio-Impedance
AUTHORS:
Rihui Li, Jinwu Gao, Hongbin Wang, Qing Jiang
KEYWORDS:
Bio-Impedance; Bladder Urinary Volume; DDS; Zigbee
JOURNAL NAME:
Engineering,
Vol.5 No.10B,
November
1,
2013
ABSTRACT: For the needs of bladder urinary volume noninvasive monitoring
in clinical, we present a noninvasive bladder urinary volume monitoring system based
on bio-impedance. The system uses a four-electrode structure,which is
composed of a pair of excitation electrodes and a pair of measurement electrodes.
The Direct Digital Frequency Synthesis (DDS) is applied to generate a 50 kHz sine
current excitation source. The impedance information extracted from phase sensibility demodulation technology
is transferred to a computer through Zigbee wireless technology for real-time monitoring.
Two experiments are taken to verify the accuracy and feasibility of the system.
The experiments results show that the system can accurately measure the corresponding
electrical impedance change of the bladder. The system provides a new way to continuously
and noninvasively monitor the bladder urinary volume of patients with bladder dysfunction.