Patent ID: 8808203
Filing Date: 2014-08-19
Classification: A61B

Abstract:
1. A capacitive sensor comprising: means for securing the capacitive sensor against an abdomen; an insulating substrate; a first electrode disposed on a first side of the substrate; a second electrode positioned on the first side of the substrate in a spaced relation to the first electrode, at least part of the second electrode configured to move toward or away from the first electrode in response to a uterine contraction of the abdomen; and a conductive standoff sandwiched between the substrate and the second electrode for maintaining the second electrode in spaced relation to the first electrode, the conductive standoff electrically coupled to the second electrode and electrically isolated from the first electrode; and a conductive sheet on each side of the substrate, wherein: the conductive sheets are electrically connected; the first electrode is electrically isolated from the conductive sheet on the first side of the substrate; and the second electrode is electrically connected to the conductive sheet on the first side of the substrate via the conductive standoff; wherein the conductive sheets in combination with the second electrode and the conductive standoff are configured to form an electric shield around the first electrode.