초록 ▼

A low priming volume integrated centrifugal pump and membrane oxygenator comprising a housing (10) containing a mass transfer bed (40) comprising gas permeable hollow membrane fibers (38) placed circumferentially in a ring around an impeller (30). The mass transfer bed (40) is formed by a multiple w

A low priming volume integrated centrifugal pump and membrane oxygenator comprising a housing (10) containing a mass transfer bed (40) comprising gas permeable hollow membrane fibers (38) placed circumferentially in a ring around an impeller (30). The mass transfer bed (40) is formed by a multiple wrap of a fiber ribbon (42) comprising at least two layers of fibers (38) bonded in precise orientation with fibers in alternate layers positioned in line with the opening between fibers in the layers above and below. Adhesion means ensure precise orientation of the fibers (38). Priming volume is further reduced by a small impeller flow channel volume.

대표청구항 ▼

A mass transfer bed for effecting mass transfer between a first fluid and a second fluid, said mass transfer bed comprising: a rigid housing; a multiplicity of elongate, tubular gas permeable hollow fibers, each of said hollow fibers having a first end, a second end, an outer surface and a hollow lu

A mass transfer bed for effecting mass transfer between a first fluid and a second fluid, said mass transfer bed comprising: a rigid housing; a multiplicity of elongate, tubular gas permeable hollow fibers, each of said hollow fibers having a first end, a second end, an outer surface and a hollow lumen extending longitudinally therethrough, contained in said rigid housing; means for passing a first fluid into said housing such that said first fluid will flow radially over the outer surfaces of said hollow fibers; a manifold to facilitate passage of a second fluid through the lumens of said hollow fibers, said manifold comprising an enclosure having: i) an inlet passageway in communication with the first ends of said hollow fibers to facilitate infusion of a second fluid into the lumens of said hollow fibers through the first ends thereof; ii) an outlet passageway in communication with the second ends of said hollow fibers to receive said second fluid after it has passed through the lumens of said hollow fibers and out of the second ends thereof; a second fluid inlet means extending into said housing and into communication with said inlet side of said manifold to facilitate passage of said second fluid through the inlet side of said manifold and into the lumens of said hollow fibers; and a second fluid outlet means extending from the outlet side of said manifold through said housing to facilitate passage of said second fluid out of the lumens of said hollow fibers, through the outlet side of said manifold, and out of said housing; said mass transfer bed being arranged in a generally circular ring with said manifold being located within said ring such that said manifold forms a segment of said ring, and wherein said hollow fibers extend circumferentially about said ring with the first ends of said fibers being connected to the inlet passageway of said manifold and the second ends of said fibers being connected to the outlet passageway of said manifold; said mass transfer bed being thereby operative to effect mass transfer between a first fluid which is circulated radially over the outer surfaces of said fibers and a second fluid which is circulated circumferentially through the lumens of said fibers and around said ring.