A commandable ingestible temperature monitor

Author

Eberhart, R.C. ; Hogrefe, A.F.

Author_Institution

Appl. Phys. Lab., John Hopkins Univ., Laurel, MD, USA

fYear

1988

fDate

4-7 Nov. 1988

Firstpage

812

Abstract

The commandable ingestible temperature monitor (CITM) is based on a 262.252-kHz miniature quartz crystal that has a 9-Hz/ degrees C temperature coefficient. The capsule is 10.7 mm in diameter and 22.6-mm long. A 1.2-V nickel-cadmium cell provides over 100 hours operation in continuous monitoring, and more with intermittent interrogation. Recharging allows extended pill testing as desired and reuse in animal studies. The CITM is specified for 0.1 degrees C accuracy and can be calibrated to better than 0.01 degrees C at any given battery voltage. It can be used for deep body core monitoring with a range of over 1 ft (pickup typically mounted in clothing or harness) for both human and animal studies. The command feature provides extended life and minimum local interference.<>

Keywords

biological techniques and instruments; biomedical equipment; biothermics; patient monitoring; temperature measurement; 262.252 kHz; Ni-Cd cell; animal studies; commandable ingestible temperature monitor; deep body core monitoring; extended pill testing; human studies; quartz crystal;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE

Conference_Location

New Orleans, LA, USA

Print_ISBN

0-7803-0785-2

Type

conf

DOI

10.1109/IEMBS.1988.95068

Filename

95068