Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
2008-06-19
2011-10-11
Lucchesi, Nicholas D (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
Reexamination Certificate
active
08034020
ABSTRACT:
An optical flow sensor is provided, including a heater configured to heat an aliquot of fluid in an adjacent fluid-delivery channel and a sensor disposed adjacent to the fluid-delivery channel downstream from the heater. The sensor is configured to illuminate fluid in the fluid-delivery channel, to collect reflected light from the illuminated fluid, and to determine when the heated aliquot passes the sensor based upon an amount of the reflected light. A method for determining a flow rate of a fluid is also provided. The method includes heating an aliquot of the fluid at a first position of a fluid-delivery channel, illuminating fluid in the fluid-delivery channel at a second position downstream from the first position, measuring an amount of light reflected from the illuminated fluid to determine a change in the amount corresponding to the heated aliquot passing the second position, and calculating the flow rate of the fluid based upon a distance between the first position and the second position and a time between the heating the aliquot and the heated aliquot passing the second position.
REFERENCES:
patent: 5533412 (1996-07-01), Jerman et al.
patent: 6304328 (2001-10-01), Longtin
patent: 6386050 (2002-05-01), Yin et al.
patent: 6582393 (2003-06-01), Sage, Jr.
Carefusion 303, Inc.
Flick Jason
Lucchesi Nicholas D
McDermott Will & Emery LLP
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