Implanted muscle powered drug dispensing system

A muscle powered liquid dispensing insert for use with an implanted anchor having a hollow anchor sleeve extending into the subcutaneous fascia of an animal, comprising:

• (a) one or more balloon-like reservoirs disposed below a lower end of the anchor sleeve, each such reservoir containing a drug or other medicant in substantially liquid form;
• (b) a pump assembly positioned at the lower end of the anchor sleeve adjacent said one or more reservoirs, said pump assembly having:
• (i) a pump body defining a pump chamber and including a flexible impermeable pump diaphragm, said pump chamber communicating through separate inlet valve means with each of the one or more reservoirs, and through outlet valve means with the tissue of the animal,
• (ii) a piston having
• (A) a piston head fixedly attached to the pump diaphragm,
• (B) a piston shaft fixedly attached to and depending from the piston head and extending downwardly to a lower end positioned adjacent a muscle of the animal, said piston being translated by movement of the animal's muscles so as to vary the volume of the pump chamber, and
• (C) means biasing the piston in a direction which minimizes the volume of the pump chamber;
• and
• (c) one or more tubes, each tube communicating through the interior of the anchor sleeve between an associated reservoir and a sealable accessible opening.

In combination with an implanted anchor having a flat anchor flange positionable adjacent the surface of the animal's skin, an anchor sleeve fixedly attached around an opening of the anchor flange and extending therefrom into the animal, healing material disposed around an upper portion of the anchor sleeve, said healing material aiding the healing of the animal's tissue and growth of said tissue to the healing material, and one or more upwardly and outwardly projecting barbs disposed around a lower portion of the sleeve, a muscle powered liquid dispensing insert comprising:

• (a) one or more balloon-like reservoirs disposed below a lower end of the anchor sleeve, each such reservoir containing a drug or other medicant in substantially liquid form;
• (b) a pump assembly positioned at the lower end of the anchor sleeve adjacent said one or more reservoirs, said pump assembly having:
• (i) a pump body defining a pump chamber and including a flexible impermeable pump diaphragm, said pump chamber communicating through separate inlet valve means with each of the one or more reservoirs, and through outlet valve means with the tissue of the animal,
• (ii) a piston having
• (A) a piston head fixedly attached to the pump diaphragm,
• (B) a piston shaft fixedly attached to and depending from the piston head and extending downwardly to a lower end positioned adjacent the animal's splenius muscle, said piston being translated by movement of the animal's splenius muscle and tissues so as to vary the volume of the pump chamber, and
• (C) means biasing the piston in a direction minimizing the volume of the pump chamber;
• and
• (c) one or more tubes, each tube communicating through the interior of the anchor sleeve between an associated reservoir and a sealable accessible opening.

A liquid drug delivery system comprising:

• (a) an implanted anchor having a flat anchor flange positioned adjacent the surface of the animal's skin, an anchor sleeve fixedly attached around an opening of the anchor flange and extending therefrom into the animal, healing material disposed around an upper portion of the anchor sleeve, said healing material aiding healing of the animal's tissue and growth of said tissue to the healing material, and barb means disposed around the sleeve;
• and
• (b) a muscle powered insert having one or more balloon-like reservoirs disposed below a lower end of the anchor sleeve and containing one or more drugs or other medicants in substantially liquid form;
• a pump assembly positioned at the lower end of the anchor sleeve adjacent said one or more reservoirs, said pump assembly having a pump body defining a pump chamber and including a flexible impermeable pump diaphragm, said pump chamber communicating through separate inlet valve means with each of the one or more reservoirs, and through outlet valve means with the tissue of the animal, a piston having a piston head fixedly attached to the pump diaphragm, a piston shaft fixedly attached to and depending from the piston head and extending downwardly to a lower end positioned adjacent the animal's muscles, said piston being translated by movement of the animal's muscles and tissues so as to vary the volume of the pump chamber, means biasing the piston in a direction which minimizes the volume of the pump chamber, and one or more tubes, each tube communicating through the interior of the anchor sleeve between an associated reservoir and a sealable access opening.