Tissue penetration device
First Claim
Patent Images
1. A method of injecting an agent into the tissue of a patient at a known predetermined 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) determining a contact point between a distal extremity of the elongate injection shaft and the target tissue;
(c) advancing the elongate injection shaft into the target tissue from the contact point over a displacement equal to the sum of an elastic recoil displacement value for the target tissue, the distance between a distal extremity of the elongate injection shaft and the outlet port, and the desired tissue depth of injection for agent deposition; and
(d) injecting the agent.
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Accused Products
Abstract
An agent injection device is provided that is capable of injecting an agent to a known predetermined tissue depth. An injection member has an elongate injection shaft with an outlet port configured to dispense an agent at a controllable time. A controllable driver is coupled to the elongate injection shaft and is configured to drive the injection member into target tissue. A velocity control system is in communication with the controllable driver and is configured to control the velocity of the elongate injection shaft.
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Citations
23 Claims
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1. A method of injecting an agent into the tissue of a patient at a known predetermined depth, comprising:
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(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) determining a contact point between a distal extremity of the elongate injection shaft and the target tissue; (c) advancing the elongate injection shaft into the target tissue from the contact point over a displacement equal to the sum of an elastic recoil displacement value for the target tissue, the distance between a distal extremity of the elongate injection shaft and the outlet port, and the desired tissue depth of injection for agent deposition; and (d) injecting the agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of injecting an agent into a patient'"'"'s target tissue at a desired injection depth, comprising:
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(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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification