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Drug delivery apparatus

  • US 9,764,121 B2
  • Filed: 11/03/2014
  • Issued: 09/19/2017
  • Est. Priority Date: 02/02/2011
  • Status: Active Grant
First Claim
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1. A drug delivery apparatus for delivering a drug into a bodily fluid in a bodily cavity over a period of time, the apparatus comprising:

  • a cannula for facilitating fluid flow through a lumen thereof to and from the bodily cavity;

    at least one hollow member defining a lumen in fluid communication with the cannula,a leaky check valve comprising a one-way check valve and a leak path, the leaky check valve disposed within at least one of the cannula or the at least one hollow member and configured to enable a fluid flow through the at least one hollow member and the cannula in a first direction at a first rate and in a second direction opposite to the first direction and at a second rate different than the first rate; and

    an actuator for driving fluid through the at least one hollow member and the cannula, the actuator being adapted to operate non-continuously.

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