期刊
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
卷 2, 期 1, 页码 44-49出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TBCAS.2008.921601
关键词
Bladder; instrumentation amplifier (IA); linearity; low power consumption; mini-invasive; urine pressure
资金
- National Science Council part by National Sun Yat-Sen University, Ministry of Education, Taiwan, R. O. C [NSC 96-2923-E-110-001, Grant NHRI-EX97-9732EI]
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 similar to 19.7 Psi, which covers the range of all of the known unusual bladder syndromes or complications.
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