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Medical liquid injection system and method

  • US 6,520,928 B1
  • Filed: 08/19/1999
  • Issued: 02/18/2003
  • Est. Priority Date: 08/19/1999
  • Status: Expired due to Term
First Claim
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1. A medical liquid injection system, comprising:

  • a hand-held injection device having a motor, a cartridge case for holding a medical liquid cartridge, a needle, and means, connected to said motor, for expelling liquid from said cartridge through said needle;

    a foot-operable pedal connected to said injection device for controlling the operation of said motor;

    a control unit connected to said foot-operable pedal for selecting or programming injection procedures;

    said injection system having a preparation mode for calibration of said cartridge, an introduction mode for advancing said needle to a desired location, an aspiration mode for detecting and preventing intravenous injection of the medical liquid, and an injection mode for delivering the medical liquid to the desired location;

    said preparation, introduction, aspiration, and injection modes being independently selectable by depressing said foot-operated pedal in discrete directions. operable during a continuous depression of said foot-operable pedal in a predetermined direction and ceasing upon release of said foot-operable pedal.

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