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Retractable Centesis Needle

  • US 20170135726A1
  • Filed: 11/13/2015
  • Published: 05/18/2017
  • Est. Priority Date: 11/13/2015
  • Status: Active Grant
First Claim
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1. A retractable centesis needle comprising:

  • a housing having a cavity;

    a hollow outer cannula extending distally from the housing, said outer cannula being open at both ends and defining a channel therethrough;

    an inner cannula slidably disposed within the channel, wherein said inner cannula is adapted to slide between a fully extended state and a fully retracted state;

    a first biasing member disposed in the housing cavity, said first biasing member associated with the inner cannula and biasing the inner cannula distally;

    a second biasing member disposed in the housing cavity, said second biasing member variably associated with the inner cannula wherein the second biasing member distally biases the inner cannula when in the fully retracted state, and wherein the second biasing member does not bias the inner cannula when in the fully extended state.

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