Blow molded venous drip chamber for hemodialysis

Claim 2

The blow-molded chamber of Claim 1 in which an indentation is defined within said outlet port, said tubular plastic filter defining an outer end portion that carries a radially outwardly projecting, annular flange proportioned to slidingly pass through said second access port, but to engage said indentation to limit inward travel of said filter to a predetermined, innermost position.

Claim 3

The blow-molded chamber of Claim 2 in which flexible tubing is sealed to said outlet port and within said outlet port at a position outwardly of said plastic filter, whereby said flange and plastic filter is retained within said outlet port by the presence of said tubing.

Claim 4

The blow molded chamber of Claim 1 in which the inlet port is positioned in separate, lateral relation to said chamber, and from which extends a conduit toward said opposed end in said separate, lateral relation, while also communicating with said chamber at a position between said first and opposed ends.

Claim 5

The blow molded chamber of Claim 4 in which the conduit inlet communicates in radiussed horizontal direction.

Claim 6

The blow molded chamber of Claim 1 in which a portion of said chamber adjacent said first end is relatively oval in cross section, when compared with a portion of said chamber adjacent said opposed end.

Claim 7

The blow molded chamber of Claim 1 in which the inlet port is positioned in separate, lateral relation to said chamber and from which extends a conduit toward said opposed end in said separate, lateral relation, while also communicating with said chamber at said opposed end.

Claim 8

The blow molded chamber of Claim 7 in which the inlet port and outlet port are of the same height, by means of a partition positioned between them.

Claim 9

The blow molded chamber of Claim 1 in which three of said first access ports are present.

Claim 10

A venous hemodialysis set which includes at least one blow molded plastic venous chamber of Claim 1.

Claim 11

A blow-molded, rigid, plastic, venous chamber for hemodialysis, said chamber defining a plurality of first access ports adjacent a first end, a second access port at an opposed end, and a tubular, plastic filter positioned in close-fitting relation within said second access port to project into said chamber, at least one of said first access ports being positioned in separate, lateral relation to said chamber and extending from said first end toward said opposed end in separate, lateral relation, while also communicating with said chamber at a position between said first and opposed ends, and in which a portion of said chamber adjacent said first end is relatively flat and wide in cross section, when compared with a portion of said chamber adjacent said opposed end.

Claim 12

The blow-molded chamber of Claim 11 in which an outwardly-facing annular step is defined within said second access port, a tubular plastic filter defining an outer end portion that carries a radially outwardly projecting, annular flange proportioned to slidingly pass through said second access port, but to engage said annular step to limit inward travel of said filter to a predetermined, innermost position.

Claim 13

The blow-molded chamber of Claim 12 in which flexible tubing is sealed to said second access port and within said port at a position outwardly of said plastic filter, whereby said plastic filter is retained within said second access port by the presence of said tubing.

Claim 14

A venous hemodialysis set which includes at least one blow-molded, rigid, plastic venous chamber of Claim 13.

Claim 15

The venous hemodialysis set of Claim 14 in which said blow molded chamber carries three of said first access ports.

Claim 16

The venous hemodialysis set of Claim 15 in which the blood contacting inner portions of said blow-molded chamber are essentially free of sharp angles and edges.

Claim 17

In a dialysis system which comprises dialysis set means mounted in a dialysis machine, said dialysis set means comprising a venous chamber, the improvement comprising an injection site positioned downstream of said venous chamber, but upstream of the bubble detector and downstream clamp of said dialysis apparatus, whereby drugs may be administered through the set to the patient downstream of the venous chamber.