Osmotic pump delivery system with pre-hydrated membrane(s) and/or primable catheter
First Claim
1. A kit, comprising:
- a liquid tight container, enclosing;
an implantable osmotic pump, the pump including a semipermeable membrane;
a salt tablet, and an aqueous solution, wherein the aqueous solution is in fluid contact at least with the salt tablet and the semipermeable membrane, and wherein the salt tablet and the aqueous solution are enclosed by the liquid tight container and separate from the implantable osmotic pump, and maintain the semipermeable membrane in a hydrated state.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable osmotic pump system includes a pre-hydrated semipermeable membrane to reduce the time interval between implantation of the system into the patient and full operation of the pump system. The semipermeable membrane is maintained in a hydrated state prior to implantation by fluid contact with a saline solution maintained in a saturated state by a salt tablet. As the differential osmotic pressure across the hydrated semipermeable membrane is negligible as the saline concentration on both sides of the membrane is the same, the pump system does not operate and does not infuse the pharmaceutical agent as long as this osmotic equipotential state is maintained. When the saturated saline solution is removed from fluid contact with the semipermeable membrane and the system is implanted in a patient, the osmotic pressure differential across the semipermeable membrane increases, thereby causing the pump to immediately begin operation at or near its intended and designed steady state infusion rate. To further decrease the delay between implantation and effusion of a pharmaceutical agent from the system, the infusion lumen of an attached catheter may be at least partially flushed with the same or a different pharmaceutical agent as is loaded in the pharmaceutical agent compartment of the pump system.
35 Citations
35 Claims
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1. A kit, comprising:
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a liquid tight container, enclosing;
an implantable osmotic pump, the pump including a semipermeable membrane;
a salt tablet, and an aqueous solution, wherein the aqueous solution is in fluid contact at least with the salt tablet and the semipermeable membrane, and wherein the salt tablet and the aqueous solution are enclosed by the liquid tight container and separate from the implantable osmotic pump, and maintain the semipermeable membrane in a hydrated state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
an ampoule containing a pharmaceutical agent therein, and a syringe fitted with an extension tube, a distal end of which is dimensioned to fit within the proximal valve of the catheter.
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6. The kit of claim 1, wherein the osmotic pump is preloaded with a pharmaceutical agent.
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7. The kit of claim 6, wherein the osmotic pump is preloaded with at least one pharmaceutical agent for at least one therapy selected from a group including pain therapy, hormone therapy, gene therapy, angiogenic therapy, anti-tumor therapy, chemotherapy and other pharmaceutical therapy.
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8. The kit of claim 6, wherein the pharmaceutical agent includes at least one of fentanyl, sufentanil, clonidine and mixtures thereof.
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9. The kit of claim 1, wherein the catheter includes a distal valve mechanism adapted to prevent fluid back flow into the catheter.
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10. The kit of claim 1, wherein the saturated saline solution is in fluid contact with the osmotic pump and the tablet.
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11. The kit of claim 1, wherein the container includes a flexible fluid tight bag.
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12. The kit of claim 1, wherein the bag includes at least one of polyethylene, PET, PETG and a gas permeable barrier film.
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13. An implantable osmotic pump system, comprising:
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a pump housing having a proximal and a distal end, the pump housing including a pharmaceutical agent compartment and an osmotic agent compartment separated by a movable piston;
a semipermeable membrane fitted to the proximal end;
an impermeable membrane disposed over and away from the semipermeable membrane to define a fluid tight hydration compartment between the semipermeable membrane and the impermeable membrane, the impermeable membrane being configured to be breached prior to implantation of the osmotic pump system in a patient, and a saturated saline solution within the hydration compartment. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A kit, comprising:
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an implantable osmotic pump system, comprising;
a pump housing having a proximal and a distal end, the pump housing including a pharmaceutical agent compartment and an osmotic agent compartment separated by a movable piston;
a semipermeable membrane fitted to the proximal end;
an impermeable membrane disposed over and away from the semipermeable membrane to define a fluid tight hydration compartment between the semipermeable membrane and the impermeable membrane, the impermeable membrane being configured to be breached prior to implantation of the osmotic pump system in a patient and an aqueous solution within the hydration compartment, anda lancet adapted to breach the impermeable barrier. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification