Continuous blood pressure monitoring utilizing a CMOS tactile sensor
Continuous blood pressure monitoring utilizing a CMOS tactile sensor
复制标题
利用 CMOS 触觉传感器连续监测血压
DOI：
10.1109/iembs.2004.1403675
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
H. Baltes
中科院分区：
文献类型：
--
作者：
T. Salo;K. Kirstein;J. Sedivý;J. Grunenfelder;T. Vancura;G. Zund;H. Baltes
提出了一种基于单片集成传感器芯片的新型触觉式体外血压测量装置。它使用眼压测量原理，从而允许连续监测血压，而无需侵入性导管。在芯片上，阵列中的膜的偏转被电容性地感测，并使用/spl Sigma//spl Delta/-调制器读出。膜阵列和调制器使用工业CMOS（互补金属氧化物半导体）技术结合后处理微机械加工在单个芯片上制造，以实现具有低功耗的小型便携式设备。测试装置以每秒1千个样品的转换速率运行，并压力偏置到2000 hPa（1500 mmHg）参考点。该传感器芯片的功耗为11.5 mW，信噪比优于72 dB。测试期间，使用这种基于CMOS的触觉设备在感兴趣的范围内实现了/spl Sigma//spl Delta/-调制器输出端一位数的压力分辨率/spl sim/8 hPa（6 mmHg）成功证明了连续血压监测。血压波形的特性特征从所采集的数据中可以清楚地识别。
A novel tactile device based on a monolithically integrated sensor chip is presented for external blood pressure measurement. It uses a tonometric principle, thus allowing for continuous monitoring of the blood pressure without the need for an invasive catheter. On the chip, the deflection of membranes in an array is sensed capacitively and read out using a /spl Sigma//spl Delta/-modulator. The membrane array and the modulator are fabricated on a single chip using an industrial CMOS (complementary metal oxide semiconductor) technology combined with post-process micromachining to achieve small and portable devices with low power consumption. The tested device is operated at a conversion rate of 1 kilosamples per second and is pressure biased to a 2000 hPa (1500 mmHg) reference point. The power consumption of the sensor chip is 11.5 mW with signal-to-noise ratio better than 72 dB. During testing a pressure resolution of /spl sim/8 hPa (6 mmHg) for one digit at the output of the /spl Sigma//spl Delta/-modulator is achieved over the range of interest continuous blood pressure monitoring using this CMOS-based tactile device is successfully demonstrated. The characteristic features of a blood pressure waveform are clearly recognizable from the acquired data.