Refillable body powered drug delivery techniques
First Claim
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1. An implantable and refillable dispensing device for delivering a treatment agent to a body comprising in combination:
- a first chamber for holding said treatment agent;
a conduit between said first chamber and said body;
a second chamber for holding a delivery agent;
means for applying pressure to said first chamber due to changes in volume of said delivery agent in said second chamber so that said treatment agent is delivered through said conduit to said body;
septum means for facilitating the introduction of treatment agent into said first chamber and for facilitating the removal of delivery agent from said second chamber, whereby said treatment agent can be introduced into said first chamber and said delivery fluid can be withdrawn from said second chamber using a rejuvenating device, while said dispensing device remains implanted in the body.
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Abstract
Techniques for implanting and refilling a device for delivering a treatment agent to a body. First and second chambers for holding treatment agent and delivery agent, respectively, are placed adjacent docking compartments adapted to receive a hypodermic needle through septums so that the expended delivery agent can be withdrawn and a new supply of treatment agent can be introduced without removing the device from its implanted position in a body.
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Citations
31 Claims
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1. An implantable and refillable dispensing device for delivering a treatment agent to a body comprising in combination:
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a first chamber for holding said treatment agent; a conduit between said first chamber and said body; a second chamber for holding a delivery agent; means for applying pressure to said first chamber due to changes in volume of said delivery agent in said second chamber so that said treatment agent is delivered through said conduit to said body; septum means for facilitating the introduction of treatment agent into said first chamber and for facilitating the removal of delivery agent from said second chamber, whereby said treatment agent can be introduced into said first chamber and said delivery fluid can be withdrawn from said second chamber using a rejuvenating device, while said dispensing device remains implanted in the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dispensing device for delivering a treatment agent to a body comprising:
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a treatment agent chamber for holding the treatment agent; a delivery agent chamber for holding a supply of delivery agent; a conduit for permitting egress of the treatment agent from the treatment agent chamber to the body; means for applying pressure to the treatment agent chamber due to changes in volume of the delivery agent in the delivery agent chamber so that the treatment agent is delivered through the conduit to the body; and a first septum for permitting a rejuvenating device to selectively communicate with the treatment agent chamber to supply treatment agent thereto. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. An implantable dispensing device for deliverying a treatment agent to a body comprising:
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a main chamber including a treatment agent chamber for containing a treatment agent and a delivery agent chamber for containing delivery agent; a conduit for permitting egress of treatment agent from the treatment agent chamber to the body; means for applying pressure to the treatment agent chamber due to changes in volume of the delivery agent in the delivery agent chamber so that the treatment agent is delivered through the conduit to the body; and a docking compartment, in communication with the main chamber, for facilitating selective communication of the treatment agent chamber and the delivery agent chamber with a rejuvenating device adapted to remove a supply of exhausted delivery agent from the delivery agent chamber and to introduce a fresh supply of treatment agent to the treatment agent chamber. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification