Set for blood processing

• US 6,517,508 B1
• Filed: 11/03/1999
• Issued: 02/11/2003
• Est. Priority Date: 11/03/1999
• Status: Expired due to Term

• Current Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Original Assignee: DSU Medical Corporation
• Inventors: Andrews, Keith, Schnell, William J., Utterberg, David S.
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Thissell, Jeremy
• Application Number:
  US09/432,555
• Time in Patent Office: 1,196 Days
• Field of Search: 604/4.01, 604/5.01, 604/6.09, 604/6.1, 604/905
• US Class Current: 604/4.01
• CPC Class Codes: A61M 1/14 Dialysis systems; Artificial kidneys; Blood oxygenators semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00 ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3627 Degassing devices; Buffer reservoirs; Drip chambers; Blood filters
• CPC Class Codes: A61M 1/3639 Blood pressure control, pressure transducers specially adapted therefor
• CPC Class Codes: A61M 1/3643 Priming, rinsing before or after use
• CPC Class Codes: A61M 1/3644 Mode of operation
• CPC Class Codes: A61M 39/20 Closure caps or plugs for connectors or open ends of tubes
• CPC Class Codes: A61M 39/24 Check- or non-return valves

Abstract

A combined arterial and venous blood tubing set is provided for transport of blood between a patient and a blood processing unit. The set comprises an arterial set component comprising arterial tubing having an arterial patient connector at one end and an arterial unit connector at the other. A venous set component has venous tubing with a venous patient connector at one end and a venous unit connector at the other end. The arterial and venous patient connectors, and the arterial and venous unit connectors, are respectively, substantially, and releasably directly connected to each other. As a result of this, the arterial, and venous set components cooperate to form a loop. Other features of improved sets are also disclosed.

Claims

1. A tubular medical fluid set comprising an in-line bubble trap chamber having a top wall, said top wall defining aport which communicates with flow tubing of said tubular set, said port communicating with a port tube extending into said chamber and having an inner tube end a spaced below said top wall, said tube end defining a wall that directs flow out of said tube circumferentially of said bubble trap chamber, whereby blood entering said chamber through said tube is directed circumferentially about said chamber wall, and further in which said chamber defines a baffle to convert circumferential flow into turbulent flow at positions above said tube end wall and said circumferentially directed blood, to prevent formation of a blood whirlpool having a significant, centrally depressed upper surface.

2. A tubular medical fluid set comprising an in-line bubble trap chamber having a top wall, said top wall defining an axially depressed portion which, in turn, defines a needle pierceable, resealable injection site to permit an injection needle of at least ½

inch needle length to penetrate said injection site and to communicate with liquid below said liquid level.

3. The tubular set of claim 2 in which said chamber defines a liquid level therein having a predetermined air volume which has a volume of at least 4 cc.

4. A tubular medical fluid set comprising an in-line bubble trap chamber having a top wall, a port communicating with flow tubing of the tubular set, said port communicating with a port tube extending into said chamber and having an inner tube end spaced below said top wall, said tube end being positioned to direct flow out of said tube circumferentially into the bubble trap chamber at a position spaced below said top wall, whereby blood entering said chamber through said tube is directed circumferentially about said chamber, further in which said chamber defines a baffle to convert circumferential flow into turbulent flow at positions above said tube end wall and said circumferentially directed blood, to prevent formation of a blood whirlpool having a significant, centrally depressed upper surface.