Single roller blood pump and pump/oxygenator system using same

A pump, comprising:

• a housing forming an elongated chamber having a substantially circular cross-section;
• a rotor assembly having a drive roller, said rotor assembly being disposable within said housing and arranged for coaxial rotation within said chamber;
• and
• a flexible tube having a proximal end, a distal end nd a wall forming a lumen therethrough, said tube being arranged in a helical turn and disposed within said chamber substantially contiguous with an interior surface of said housing, and having a compression portion, wherein said tube has a D-shaped cross-section, wherein, in an uncompressed state, the lumen of said tube in said compression portion has a volume per unit length that varies in a direction from the proximal end to the distal end, and wherein rotation of said rotor assembly rotatably advances said drive roller to progressively occlude said tube in a direction from the proximal end to the distal end to pump a fluid therethrough.

A pump, comprising:

• a housing forming an elongated chamber having a substantially circular cross-section;
• a rotor assembly having a drive roller, said rotor assembly being disposable within said housing and arranged for coaxial rotation within said chamber;
• and
• a flexible tube having a proximal end, a distal end nd a wall forming a lumen therethrough, said tube being arranged in a helical turn and disposed within said chamber substantially contiguous with an interior surface of said housing, and having a compression portion, wherein said tube is composed of thermoforming plastic material, and is preformed by a thermoforming technique, wherein said tube has a D-shaped cross-section, wherein, in an uncompressed state, the lumen of said tube in said compression portion has a volume per unit length that varies in a direction from the proximal end to the distal end, and wherein rotation of said rotor assembly rotatably advances said drive roller to progressively occlude said tube in a direction from the proximal end to the distal end to pump a fluid therethrough.

A pump comprising:

• a housing forming an elongated chamber having a substantially circular cross-section, said housing comprises an inlet port and an outlet port formed therein, each port providing a lumen for fluid communication from the interior of said housing to the exterior of said housing;
• a rotor assembly having a drive roller, said rotor assembly being disposable within said housing and arranged for coaxial rotation within said chamber;
• and
• a flexible tube having a proximal end, a distal end and a wall forming a lumen therethrough, said tube being arranged in helical turn and disposed within said chamber substantially contiguous with an interior surface of said housing, and having a compression portion, wherein, in an uncompressed state, the lumen of said tube in said compression portion has a volume per unit length that varies in a direction from the proximal end to the distal end, wherein the proximal end of said tube is attached to said housing at said inlet port and is in fluid communication with said inlet port, and wherein the distal end of said tube is attached to said housing at said outlet port and is in fluid communication with said outlet port, and wherein rotation of said rotor assembly rotatably advances said drive roller to progressively occlude said tube in a direction from the proximal end to the distal end to pump a fluid therethrough.

A pump, comprising:

• a housing forming an elongated chamber having a substantially circular cross-section, said housing including a primary housing portion and a cap attachable to an open end of said primary housing portion, said primary housing portion having a conical taper from the open end to a closed end thereof;
• a rotor assembly including a drive roller, said rotor assembly being disposable within said housing, and arranged for coaxial rotation within said chamber, and said drive roller assembly having a conical configuration corresponding to the conical taper of said housing;
• means for translating said rotor assembly along an axis thereof from a storage position to an operative position;
• and
• a flexible tube having a proximal end, a distal end and a wall forming a lumen therethrough, said tube being arranged in a helical turn and disposed within said chamber substantially contiguous with an interior surface of said housing, wherein, in said operative position, said rotor assembly rotatably advances said drive roller from the proximal end to pump fluid therethrough.