Erik A Johannessen, Lei Wang, Li Cui, Tong Boon Tang, Mansour Ahmadian, Alexander Astaras, Stuart W J Reid, Philippa S Yam, Alan F Murray, Brian W Flynn, Steve P Beaumont, David R S Cumming, Jonathan M Cooper
A novel microelectronic "pill" has been developed for in situ studies of the gastro-intestinal tract, combining microsensors and integrated circuits with system-level integration technology. The measurement parameters include real-time remote recording of temperature, pH, conductivity, and dissolved oxygen. The unit comprises an outer biocompatible capsule encasing four microsensors, a control chip, a discrete component radio transmitter, and two silver oxide cells (the latter providing an operating time of 40 h at the rated power consumption of 12...
March 2004: IEEE Transactions on Bio-medical Engineering