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Single roller blood pump and pump/oxygenator system using same

  • US 5,342,181 A
  • Filed: 07/09/1993
  • Issued: 08/30/1994
  • Est. Priority Date: 06/15/1992
  • Status: Expired due to Fees
First Claim
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1. A roller pump, comprising:

  • a housing forming an elongated chamber having a substantially circular cross-section;

    a rotor assembly having a single 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 substantially uniform lumen therethrough, said tube being arranged in a helical turn, disposed within said chamber substantially contiguous with an interior surface of said housing, and having a tapered portion formed at an overlapping portion of the helical turn, wherein, in an uncompressed state, said tapered 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.

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