Injector apparatus and method for drug delivery
First Claim
1. A system for injecting a therapeutic agent into an ocular implant, the ocular implant being at least partially implanted in an eye, the system comprising:
- a needle defining an internal injection lumen configured to provide a pathway for injecting a therapeutic agent into the ocular implant;
an outlet lumen configured to provide a pathway through which pre-existing fluid in the ocular implant exits the ocular implant as therapeutic agent is injected into the ocular implant through the injection lumen; and
a receiver chamber having a channel fluidly coupled to the outlet lumen and to a first porous structure having a first resistance to flow, the receiver chamber configured to receive the pre-existing fluid that exits the ocular implant via the outlet lumen;
wherein application of a positive pressure into the injection lumen simultaneously injects an amount of the therapeutic agent into the ocular implant via the injection lumen and displaces an amount of pre-existing fluid from the ocular implant into the receiver chamber via the outlet lumen.
1 Assignment
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Accused Products
Abstract
Methods and apparatus provide a therapeutic fluid to devices implanted in the body, for example to containers of devices implanted in the eye of a patient. The methods and apparatus may comprise an injector to increase an amount of therapeutic agent injected into the device implanted in the eye, or a structure to receive the therapeutic fluid within the device implanted in the eye, or combinations thereof. The device implanted in the eye may comprise a reservoir chamber having a fluid with a density different than the therapeutic fluid, and the apparatus can be adapted to at least partially separate the implanted device fluid from therapeutic fluid within the reservoir chamber to increase and amount of therapeutic fluid placed in the reservoir chamber.
417 Citations
16 Claims
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1. A system for injecting a therapeutic agent into an ocular implant, the ocular implant being at least partially implanted in an eye, the system comprising:
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a needle defining an internal injection lumen configured to provide a pathway for injecting a therapeutic agent into the ocular implant; an outlet lumen configured to provide a pathway through which pre-existing fluid in the ocular implant exits the ocular implant as therapeutic agent is injected into the ocular implant through the injection lumen; and a receiver chamber having a channel fluidly coupled to the outlet lumen and to a first porous structure having a first resistance to flow, the receiver chamber configured to receive the pre-existing fluid that exits the ocular implant via the outlet lumen; wherein application of a positive pressure into the injection lumen simultaneously injects an amount of the therapeutic agent into the ocular implant via the injection lumen and displaces an amount of pre-existing fluid from the ocular implant into the receiver chamber via the outlet lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification