Tissue penetration device

  • US 8,622,930 B2
  • Filed: 07/18/2011
  • Issued: 01/07/2014
  • Est. Priority Date: 06/12/2001
  • Status: Active Grant
First Claim
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1. A method of injecting an agent into a patient'"'"'s target tissue at a desired injection depth, comprising:

  • (a) driving an elongate injection shaft having an outlet port configured to dispense an agent at a controllable time toward the patient'"'"'s target tissue;

    (b) advancing the elongate injection shaft into the target tissue from a contact point between the elongate injection shaft and the target tissue over a displacement greater than the desired injection depth to a position of maximum penetration;

    (c) withdrawing the injection shaft in a proximal direction to the desired penetration depth; and

    (d) injecting the agent, wherein a velocity of the elongate injection shaft at a point of contact with the patient'"'"'s skin to the point of maximum penetration is about 2 to 10 m/s;

    further comprising determining the contact point between the elongate injection shaft and the target tissue during an injection cycle.

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