A Mini-Invasive Long-Term Bladder Urine Pressure Measurement ASIC and System

A mini-invasive system for long-term bladder urine pressure measurement system is presented. Not only is the design cost reduced, but also the reliability is enhanced by using a 1-atm canceling sensing instrumentation amplifier (IA). Because the urine pressure inside the bladder does not vary drasti...

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Bibliographic Details
Published in:IEEE transactions on biomedical circuits and systems 2008-03, Vol.2 (1), p.44-49
Main Authors: Wang, Chua-Chin, Huang, Chi-Chun, Liou, Jian-Sing, Ciou, Yan-Jhin, Huang, I-Yu, Li, Chih-Peng, Lee, Yung-Chin, Wu, Weng-Jeng
Format: Article
Language:English
Subjects:
Analog-digital conversion
Application specific integrated circuits
Batteries
Bladder
Costs
instrumentation amplifier (IA)
Instruments
Linearity
low power consumption
mini-invasive
Power system reliability
Pressure measurement
Signal resolution
urine pressure
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Summary:A mini-invasive system for long-term bladder urine pressure measurement system is presented. Not only is the design cost reduced, but also the reliability is enhanced by using a 1-atm canceling sensing instrumentation amplifier (IA). Because the urine pressure inside the bladder does not vary drastically, both the sleeping and working modes are required in order to save the battery power for long-term observation. The IA amplifies the signal sensed by the pressure sensor, which is then fed into the following analog-to-digital converter. Owing to the intrinsic 1-atm pressure existing inside the bladder, the IA must be able to cancel such a pressure from the signal picked up by the pressure sensor to keep the required linearity and the resolution for pressure measurement of the bladder urine. The pressure range of the proposed system is found out to be 14.7~19.7 Psi, which covers the range of all of the known unusual bladder syndromes or complications.
ISSN:1932-4545
1940-9990
DOI:10.1109/TBCAS.2008.921601