Injectable controlled release fluid delivery system

A method of delivering at least one material to an animal, comprising:

• percutaneously injecting at least one material delivery device into an in vivo environment of the animal using a percutaneous injection mechanism, the percutaneous injection mechanism having a hollow body enclosing the at least one material delivery device, the at least one material delivery device including at least one collapsible reservoir having a biologically inert collapsible outer surface, the collapsible reservoir configured to receive, retain and controllably dispense the at least one material, a processor configured to cause emission of a magnetic control signal, and at least one controllable output mechanism coupled to the at least one collapsible reservoir, wherein the at least one controllable output mechanism defines or is located within at least one outlet through which the at least one material may be released;
• and
• delivering a quantity of the at least one material into the at least one collapsible reservoir having a biologically inert collapsible outer surface;
• wherein the at least one controllable output mechanism includes a magnetically-active material that absorbs a magnetic control signal and changes its shape to dispense the at least one material in response to at least one magnetic control signal;
• and
• delivering at least a portion of the quantity of the at least one material to the animal through the at least outlet responsive to the magnetically-active material receiving the magnetic control signal.

A method of delivering at least one material to an animal, comprising:

• percutaneously injecting at least one material delivery device into an in vivo environment of the animal using a percutaneous injection mechanism, the percutaneous injection mechanism having a hollow body enclosing the at least one material delivery device, the at least one material delivery device including at least one collapsible reservoir having a biologically inert collapsible outer surface, the collapsible reservoir configured to receive, retain and controllably dispense the at least one material, and including at least one outlet, and at least one controllable output mechanism operably linked to the at least one outlet;
• and
• delivering a quantity of the at least one material into the at least one collapsible reservoir having a biologically inert collapsible outer surface;
• wherein the at least one controllable output mechanism includes a shape-changing structure selected from the group consisting of a ferropolymer, a bimetallic structure and a shape memory material and dispenses the at least one material in response to at least one electromagnetic control signal.