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Medical treatment system and methods using a plurality of fluid lines

  • US 10,098,996 B2
  • Filed: 06/13/2016
  • Issued: 10/16/2018
  • Est. Priority Date: 07/07/2010
  • Status: Active Grant
First Claim
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1. A fluid handling cassette configured to reversibly engage with a pump control unit for operating the cassette, comprising:

  • a body having an engagement side comprising a pump chamber formed as a depression in the engagement side of the body, a fluid inlet end and a fluid outlet end, the fluid inlet and outlet ends comprising one or more ports on the body in fluid communication with the pump chamber via one or more flowpaths in the body; and

    a port on the fluid inlet end comprising a spike, the spike configured to mate with a connector of a fluid line when in use, or to mate with a spike cap when not in use;

    the spike comprising a proximal base adjacent the fluid inlet end of the cassette, and a distal end configured to penetrate the fluid line connector;

    the base of the spike comprising one or more elongate posts extending in a longitudinal direction distally along the base of the spike from the fluid inlet end of the cassette body, the posts arranged to make frictional contact with an internal surface of a spike cap installed on the spike;

    the internal surface of the spike cap comprising a circumferential raised rib that contacts the spike distal to a distal end of the one or more elongate posts, the circumferential raised rib configured to form a seal around the spike;

    wherein a portion of the spike distal to the circumferential raised rib of the installed spike cap is in fluid communication with the one or more flowpaths in the body of the cassette, and wherein a portion of the spike proximal to the circumferential raised rib of the installed spike cap is in fluid communication with an outer surface of the body of the cassette.

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