Patent ID: 8585592
Filing Date: 2013-11-19
Classification: A61B,G01N

Abstract:
1. A blood parameter measurement cassette having sensors which are chemically responsive to blood constituents during a medical procedure, said sensors being calibrated with a blood parameter monitoring device prior to said medical procedure, said cassette comprising: a main body with a longitudinal axis being oriented substantially vertically during a calibration process, wherein said main body includes a middle chamber containing a quantity of a liquid, a lower end with a first port, and an upper end with a second port, wherein during said calibration process said first port is used as a calibration gas inlet port for connection to a source of a calibration gas, wherein during said calibration process said second port is used as a gas outlet port for venting said calibration gas to atmosphere, and wherein said calibration gas being vented may induce an amount of said liquid to expel from said main body through said gas outlet port; a fitting coupled to said second port, said fitting including an internal luer connector along a central fluid path and adapted to receive a removable cap for selectably closing off the luer connector, said fitting being movable along the longitudinal axis between a first closed position and a second venting position, wherein while in said venting position an egress path is defined by a concentric space between an outer periphery of said main body and an inner periphery of said fitting, said egress path being used during said calibration process for venting said calibration gas to atmosphere while said luer connector is closed off; and an absorbent material member disposed at least partially in said egress path, wherein during said calibration process said absorbent material permits said calibration gas to vent to atmosphere while absorbing said liquid that is induced to be expelled from said main body by venting of said calibration gas; wherein said fitting has a lower end that is longitudinally displaced to expose said absorbent material member when in said venting position and that is longitudinally displaced to cover said concentric space and said absorbent material member when in said closed position.