IEEE Trans Biomed Circuits Syst. 2008 Mar;2(1):44-9. doi: 10.1109/TBCAS.2008.921601.
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.
提出了一种用于长期膀胱尿压力测量系统的微创系统。通过使用 1 个大气压消除传感仪表放大器 (IA)，不仅降低了设计成本，而且还提高了可靠性。由于膀胱内的尿液压力变化不大，因此为了节省长期观察的电池电量，需要睡眠和工作模式。IA 放大压力传感器感应的信号，然后将其输入到以下模数转换器。由于膀胱内存在固有的 1 个大气压，IA 必须能够从压力传感器采集的信号中消除这种压力，以保持膀胱尿压力测量所需的线性度和分辨率。所提出系统的压力范围被发现为 14.7~19.7Psi，涵盖了所有已知的不寻常膀胱综合征或并发症的范围。
