Contact and penetration depth sensor for a needle assembly
First Claim
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1. An apparatus, comprising:
- an intravascular delivery device, comprisinga needle to contact and penetrate tissue; and
a device coupled to the needle, the device comprising a conductive component slidably movable from a first position to a second position in response to a resistive force, an electrical signal to generate when the conductive component is in the second position, wherein a movement corresponds to a depth of tissue penetration, the depth of tissue penetration corresponding to a specific location within the tissue for delivery of a treatment agent.
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Abstract
An apparatus is disclosed. The apparatus includes a needle to contact and penetrate tissue. The apparatus also includes a device coupled to the needle, wherein the device detects the needle contacting the tissue, and measures depth of tissue penetration.
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Citations
19 Claims
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1. An apparatus, comprising:
an intravascular delivery device, comprising a needle to contact and penetrate tissue; and a device coupled to the needle, the device comprising a conductive component slidably movable from a first position to a second position in response to a resistive force, an electrical signal to generate when the conductive component is in the second position, wherein a movement corresponds to a depth of tissue penetration, the depth of tissue penetration corresponding to a specific location within the tissue for delivery of a treatment agent. - View Dependent Claims (2, 12)
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3. An apparatus, comprising:
an intravascular delivery device, comprising a needle to contact and penetrate tissue; and a device, comprising (1) a first conductive component coupled to the needle; and
(2) a second conductive component disposed at a predetermined distance from the first conductive component, the second conductive component arranged to generate an electrical signal upon contact with the first conductive component, wherein one of the first conductive component and the second conductive component is selected to move in response to a resistive force by the tissue upon penetration by the needle and wherein a movement corresponds to a depth of tissue penetration, the depth of tissue penetration corresponding to a specific location within the tissue for delivery of a treatment agent.- View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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13. An apparatus, comprising:
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a spring-loaded needle to contact and penetrate an intravascular tissue wall; a first conductive element coupled to the needle, the first conductive element slidably movable upon contact with and penetration into the tissue wall; and a second conductive element disposed at a predetermined distance from the first conductive element, the second conductive element arranged to generate an electrical signal upon contact with the first conductive element, wherein the needle is adapted to deliver a treatment agent to a specific location within the intravascular tissue wall. - View Dependent Claims (14, 15)
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16. A method, comprising:
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penetrating an intravascular tissue wall with a needle assembly, the needle assembly comprising; a needle, a first conductive element coupled to the needle, and a second conductive element disposed at a predetermined distance away from the first conductive element, wherein a resistive force in response to the penetration allows the first conductive element to slidably move toward the second conductive element, the second conductive element arranged to generate an electrical signal upon contact with the first conductive element; and delivering an appropriate a treatment agent to a specific location within the intravascular tissue wall through the needle assembly once contact between the first conductive element and the second conductive element is made. - View Dependent Claims (17, 18, 19)
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Specification