Disposable human blood dialysis device

Claim 2

A human blood filtering device comprising a support core, a filtering body formed as a helically wrapped, interleaved arrangement of a supporting mesh and of an elongated tubular blood-filtering membrane having an operative supported position on said support core, said tubular blood-filtering membrane having an inlet opening adjacent the innermost wrap of said filtering body, a blood inlet conduit means having a fluid connection to said membrane inlet opening and operatively fixedly mounted on said support core to minimize any rupturing movement in said fluid connection, a blood outlet conduit means having a fluid connection to said membrane outlet opening, and means to restrain said last named fluid connection against any rupturing movement consisting of a recessed cavity Formed in said filtering body, said cavity being bounded by plural walls extending inwardly from said filtering body outermost wrap to a prescribed depth in the direction of said support core, whereby there is an optimum minimum restriction to blood flow through said bloodfiltering membrane due to changes in flow direction therethrough.

Claim 3

A human blood filtering device as claimed in claim 1 wherein each said fluid connection comprises an inner plug member having an operative position force fit within an outer sleeve member, and the portion of said blood-filtering membrane bounding said outlet and inlet openings thereof in sealed position interposed between said inner plug and said outer sleeve.

Claim 4

A human blood-filtering device as claimed in claim 2 wherein said inner plug is cylindrical in cross section and has plural concentric ridges spaced between the ends thereof, said ridge adjacent one said end serving as a seat for holding said outer sleeve member in position and said other ridges serving as fluid seals.

Claim 5

A human blood filtering device comprising a support core, a filtering body formed in a cylindrical shape with opposite first and second operative ends of a helically wrapped, interleaved arrangement of a supporting mesh and of an elongated tubular blood-filtering membrane having an operative supported position on said support mesh and of an elongated tubular blood-filtering membrane having an operative supported position on said support core, said tubular blood-filtering membrane having an inlet opening located adjacent said filtering body first operative end and also adjacent said support core and an outlet opening located adjacent said filtering body second operative end and also adjacent the outermost wrap of said filtering body, a blood inlet conduit means having a fluid connection to said membrane inlet opening and operatively fixedly mounted on said support core to minimize any rupturing movement in said fluid connection, a blood outlet conduit means having a fluid connection to said membrane outlet opening, and means to restrain said last named fluid connection against any rupturing movement consisting of a recessed cavity formed in said filtering body adjacent said second operative end thereof, said cavity being bounded by plural walls extending inwardly from said filtering body outermost wrap to a prescribed depth in the direction of said support core, whereby there is an optimum minimum restriction to blood flow through said blood-filtering membrane due to changes in flow direction therethrough.

Claim 6

A human blood filtering device comprising a support core, a filtering body formed in a cylindrical shape with opposite first and second operative ends of a helically wrapped, interleaved arrangement of a supporting mesh and of an elongated tubular blood-filtering membrane having an operative supported position on said support mesh and of an elongated tubular blood-filtering membrane having an operative supported position on said support core, said tubular blood-filtering membrane having an inlet opening located adjacent said filtering body first operative end and also adjacent said support core and an outlet opening located adjacent said filtering body second operative end and also adjacent the outermost wrap of said filtering body, a blood inlet conduit means having a fluid connection to said membrane inlet opening and operatively fixedly mounted on said support core to minimize any rupturing movement in said fluid connection, a blood outlet conduit means having a fluid connection to said membrane outlet opening, and means to restrain said last named fluid connection against any rupturing movement consisting of a recessed cavity formed in said filtering body adjacent said second operative end thereof, said cavity being bounded by plural walls extending inwardly from said filtering body outermost wrap to a prescribed depth in the direction of said support core, whereby there is an optimum minimum restriction to blood flow through said blood-filtering membrane due to changes in flow direction therethrough.

Claim 7

A human blood-filtering device as claimed in claim 4 wherein the helical turns of said blood-filtering membrane are located adjacent said filtering body first operative end except for the last helical turn thereof which contains said outlet opening, said last helical turn being threaded from said filtering body first operative end to said second operative end thereof.

Claim 8

A human blood-filtering device as claimed in claim 4 wherein each said fluid connection comprises an inner plug member having an operative position force fit within an outer sleeve member, and the portion interposed between said inner plug and said outer sleeve.

Claim 9

A human blood-filtering device as claimed in claim 6 wherein said inner plug is cylindrical in cross section and has plural concentric ridges spaced between the ends thereof, said ridge adjacent one said end serving as a seat for holding said outer sleeve member in position and said other ridges serving as fluid seals.