Patent ID: 8641973
Filing Date: 2014-02-04
Classification: A61B,B01L,G01N,Y10T

Abstract:
1. An apparatus for determining an osmolarity of a fluid, comprising: a micro-fluidic circuit disposed in a chip, the micro-fluidic circuit comprising a tunnel, a larger hole overlapping a smaller hole at a first end of the tunnel, and a vent hole at a second end of the tunnel; and an electrical circuit formed in the chip and in communication with the micro-fluidic circuit configured for determining the osmolarity of the fluid contained within the micro-fluidic circuit, wherein the electrical circuit comprises a first electrode disposed in the tunnel at a first downstream location along the tunnel and a second electrode disposed in the tunnel at a second downstream location along the tunnel, wherein the electrical circuit comprises: wherein the third via is electrically connected to the fifth via to measure an electrical property of a fluid sample between the fifth via and the second electrode; and the second via is electrically connected to the sixth via to measure the electrical property of the fluid sample between the sixth via and the first electrode, further comprising a device connected to the electrical circuit, the device being configured to determine the osmolarity of the fluid sample in the micro-fluidic circuit based on the electrical property of the fluid.