Patent ID: 9656051
Date: 2017-05-23
CPC Classifications: A61B,A61M

Claim:
1. A device for allowing selective communication between a substrate and an outside environment, comprising: a substrate including a sensor material that has an electrical property which varies when an analyte is present, a radio frequency identification (RFID) chip and an antenna, with the chip is electrically connected to the sensor material; a first layer overlaying at least a portion of the substrate and having at least one first pore; and a second layer overlaying at least a portion of the first layer and having at least one second pore, wherein at least a portion of the first and/or second layers are movable with respect to each other between an open condition and a closed condition in response to a change in an environmental factor, the first and second pores being substantially aligned in the open condition to allow fluid communication between the substrate and the outside environment such that when the at least one first and second pores are substantially aligned fluid passes through the at the least one first pore and the at least one second pore in the second layer, the first and second pores being substantially misaligned in the closed condition to prevent fluid communication between the substrate and the outside environment; and wherein the device has a perimeter that forms a fluid tight seal with the substrate.