Implantable osmotic pump

A kit, comprising:

• an implantable osmotic pump for delivering a pharmaceutical agent to a patient, including an osmotic engine, a tube coiled around the osmotic engine, the tube defining an inner tube-shaped compartment adapted to store a pharmaceutical agent, and a piston disposed within the tube-shaped compartment, the osmotic engine being configured to exert a force on the piston to cause the piston to travel within the tube-shaped compartment and deliver the pharmaceutical agent when the pump is implanted in the patient, and
• a catheter configured to attach to the pump.

The kit of claim 65, wherein the dose escalation pen includes a dose selection actuator that is adapted to re-configure the dose escalation pen to selectively breach one of the first and second impermeable membranes.

A method of delivering a pharmaceutical agent to a patient, comprising steps of:

• implanting a pump into the patient, the pump including a pump engine and a compartment adapted to store a pharmaceutical agent, the compartment defining at least a partial torus around the osmotic engine, and
• causing a piston to travel a distance within the compartment and to deliver a dose of pharmaceutical agent out of the compartment, the dose corresponding to the distance traveled by the piston within the compartment.

A pump, comprising:

• a pump engine;
• a tube coiled around the engine, the tube defining an inner tube-shaped compartment adapted to store a fluid, and
• a piston disposed within the tube-shaped compartment, the engine being adapted to cause the piston to travel within the tube-shaped compartment and to force a dose of the fluid out of the pump.

An osmotic pump, comprising:

• an osmotic engine, and
• a pump housing enclosing the osmotic engine and defining a substantially toroidal space adapted to contain a volume of pharmaceutical agent.

A filter assembly for an osmotic pump, the filter assembly defining a first end configured to mate with the osmotic pump a second end configured to be exposed, in use, to an aqueous environment and including a filter between the first and second ends.