Patent ID: 7527601

Claim:
A medical device for measuring cervical dilation, comprising: an elongate body defining a proximal end and a distal end, the elongate body further including an inflation lumen; an expandable element coupled to the elongate body in fluid communication with the inflation lumen; an array of movable elements circumferentially disposed about the elongate body, each of the movable elements including an upper and lower portion, the array of movable elements being movably coupled to the elongate body by a plurality of wires coupled to the upper and lower portions of the movable elements; a measurement mechanism able to determine a radial spacing of the array of movable elements, wherein the measurement mechanism includes a tension ring coupled to the plurality of wires; a dilation indicator in communication with the measurement mechanism; at least one pressure sensor coupled to at least one of the array of movable elements; a distal pressure sensor coupled to a distal pad at the distal end of the elongate body; a control element in communication with the at least one pressure sensor and the distal pressure sensor; an inflation source in fluid communication with the expandable element; and an exhaust valve in fluid communication with the expandable element.