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Automated medical liquid filling system and method

  • US 9,474,690 B2
  • Filed: 10/20/2014
  • Issued: 10/25/2016
  • Est. Priority Date: 12/02/2005
  • Status: Active Grant
First Claim
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1. A drive system, interconnectable to a disposable that includes a tubular member and a piston slidably disposed in the tubular member, for automated filling of at least one interconnectable receptacle with a medical liquid, comprising:

  • a piston drive member interconnectable to a piston of a disposable for driven advancement and retraction of the piston within a tubular member of the disposable;

    a drive motor interconnected to the piston drive member for advancement and retraction of the piston drive member, wherein said drive motor includes a drive motor monitor that provides an output signal indicative of a force output of said drive motor;

    a position sensor that provides another output signal indicative of sensed degrees of movement of said piston drive member; and

    ,a controller for utilizing one of the output signal and the another output signal to determine a primary control parameter for use in controlling the drive motor to maintain a pressure within said tubular member within a predetermined pressure range, and wherein the controller utilizes the other one of the output signal and the another output signal to determine a secondary control parameter and to determine when said secondary control parameter is outside of a predetermined range.

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