Patent ID: 8308652
Filing Date: 2012-11-13
Classification: A61B,G01N

Abstract:
1. An apparatus for measuring a physiological condition within a mammal comprising: an elongated tubular housing extending along a longitudinal axis from a distal end to a proximal end, the elongated tubular housing having an internal cavity; a first opening in the elongated tubular housing funning a first passageway into the internal cavity; an ion-sensitive field effect transistor (ISFET) for measuring pH within a body lumen of the mammal, the ISFET positioned in the internal cavity, the ISFET aligned with the first opening, so that at least a portion of the ISFET is exposed via the first opening; a first seal between the ISFET and the elongated tubular housing forming a hermetic seal about a perimeter of the first opening; a temperature sensor for measuring temperature within the body lumen; a second opening in the elongated tubular housing forming a second passageway into the internal cavity; the temperature sensor comprising a thermistor covered by a metal cap, the metal cap exposed via the second opening; and a second seal between the metal cap and the elongated tubular housing forming a hermetic seal about a perimeter of the second opening.