Patent ID: 6517732
Filing Date: 2003-02-11
Classification: A61M,B01D,B04C

Abstract:
A method of removing micro-bubbles from blood, comprising the steps of:defining an axial flow path in a device having a central axis, an inlet port, an outlet port and bubble extraction port; defining a helical flow path around said central axis positioned between said inlet port and said outlet port; said defining step performed by a spiral helical rib wound symmetrically around said central axis and placed concentric with said central axis; introducing blood into said inlet port; accelerating blood containing micro-bubbles from said inlet port, along said helical path, whereby said blood experiences a pressure gradient sufficient to force said micro-bubbles to migrate toward said central axis; positioning said bubble extraction port proximate said central axis, whereby said micro-bubbles are extracted with blood flow from said bubble extraction port.