Tissue penetration device
First Claim
Patent Images
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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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.
2960 Citations
11 Claims
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1. 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, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification