Patent ID: 8771227
Filing Date: 2014-07-08
Classification: A61M

Abstract:
1. A device for delivering fluid at a constant selectable flow rate comprising: a housing; a reservoir in said housing for containing a supply of said fluid and for delivering said fluid under pressure; a primary restrictor channel and a rate selector channel each having a proximal end and a distal end, said reservoir being in fluid communication with the proximal end of at least one of said primary restrictor channel and said rate selector channel; and a delivery cannula in fluid communication with said distal end of at least one of said primary restrictor and selector channels for delivering said fluid; said primary restrictor channel comprising a plurality of sections; said rate selector channel comprising a plurality of series-connected sections separated by nodes, each section of said rate selector channel being arranged in parallel to a corresponding section of said primary restrictor channel, and each node being in fluid communication with a corresponding section of said primary restrictor channel and capable of being closed, such that when a particular node is closed, fluid flowing from said reservoir toward said cannula may not pass through the node but rather must pass through the corresponding section of said primary restrictor channel; said nodes being manipulable to select a flow rate.