Implantable infusion pump
AssigneeAdvanced Neuromodulation Systems, Inc.
InventorsSandra Marie Hooper, Bruce David Wigness, Brian Russell Blischak
Life of this patent
Estimating the term…
Abstract
An implantable infusion pump to deliver stored infusate to a desired fluid delivery site. The pump includes a collapsible fluid chamber. The pump can include a multi-stage filtration system to filter micro-emboli as well as larger particles that are inadvertently introduced into the pump system. An external member can receive the pump and provide a medium to include additional, interactive components, e.g., a bolus port, as well as provide a versatile suture structure to enable the pump to be properly secured within an implantation site. To improve volumetric efficiency, the pump can further incorporate an outlet flow passage within a movable wall of the fluid chamber.
Claims30
An infusion pump having a variable-volume fluid chamber for implantation in a living body, the pump comprising:
- a housing;
- a driving spring;
- an inlet conduit, having a self-sealing penetrable member positioned therein, extends between an outer surface of the housing and the fluid chamber;
- and
- an outlet conduit, in communication with the fluid chamber, is adapted to deliver a fluid from the fluid chamber,
- wherein the self-sealing penetrable member is adapted to be accessible through a surface of a living body when the pump is implanted therein to facilitate provision of a fluid to the fluid chamber,
- wherein the driving spring is adapted to supply a principle force to drive fluid transiently stored in the fluid chamber into the outlet conduit, and
- wherein the outlet conduit extends through the driving spring.
An implantable infusion pump having a variable-volume fluid chamber to transiently store a fluid solution, the pump comprising:
- a hardened shell structure;
- an elastomer spring diaphragm operatively joined to the shell structure, wherein the shell structure and the spring diaphragm cooperate to form the fluid chamber;
- and
- a fluid flow passage, in fluid communication with the fluid chamber, is adapted to deliver a fluid solution from the fluid chamber to an infusion site, such passage being substantially embedded within the spring diaphragm,
- wherein the spring diaphragm is operatively biased toward the shell structure.
An infusion pump for implantation in a living body, the pump comprising:
- a housing defining a portion of a collapsible fluid-tight chamber;
- a moveable spring diaphragm, defining another portion of the chamber, adapted to (i) exert a force on a solution stored in the chamber and (ii) compensate for changes in body pressure by communicating such changes to the chamber;
- an inlet conduit, having a self-sealing, penetrable member, extending between an exterior surface of the housing and the chamber;
- an outlet conduit in fluid communication with the chamber and an infusion site in the body, wherein at least a portion of the outlet conduit passes through the spring diaphragm;
- and
- a reinforced-elastomer suture structure, extending substantially continuously about a perimeter of the pump, adapted to receive and to retain a suture placed along substantially an entire length of the suture structure.
An infusion pump for implantation in a living body, the pump comprising:
- a housing defining a portion of a collapsible fluid-tight chamber;
- a moveable spring diaphragm, defining another portion of the chamber, adapted to (i) exert a force on a solution stored in the chamber and (ii) compensate for changes in body pressure by communicating such changes to the chamber;
- an inlet conduit, having a self-sealing, penetrable member, extending between an exterior surface of the housing and the chamber;
- and
- an outlet conduit in fluid communication with the chamber and an infusion site in the body, wherein at least a portion of the outlet conduit passes through the spring diaphragm.
An infusion pump for implantation in a living body, the pump comprising:
- a housing defining a collapsible fluid chamber to transiently store infusate;
- an outlet conduit, in communication with the fluid chamber, is adapted to deliver infusate to a delivery site;
- and
- a multi-stage filter system, positioned within the outlet conduit, to filter infusate prior to its delivery to the delivery site.
An infusion pump for implantation in a living body, the pump comprising:
- a housing defining at least a portion of a variable-volume fluid chamber to receive an infusate;
- an inlet conduit, having a self-sealing penetrable member positioned therein, positioned at a surface of the housing and being in communication with the fluid chamber;
- an outlet conduit in communication with the fluid chamber and connectable to a delivery catheter;
- a flow restrictor, positioned between the fluid chamber and the delivery catheter;
- a first filter stage, positioned prior to the flow restrictor;
- and
- a second filter stage, interpositioned between the first filter stage and the flow restrictor.
An infusion pump for implantation in a living body, the pump comprising:
- a housing having a collapsible fluid chamber to transiently store infusate and an energy source to collapse the fluid chamber;
- an inlet conduit, having a self-sealing penetrable member positioned therein, located at a first position relative to the housing and in communication with the fluid chamber;
- an outlet conduit, in communication with the fluid chamber, adapted to deliver infusate to a delivery site;
- and
- a member having:
- a first mating surface to receive the housing;
- and
- a reinforced-elastomer suture structure, extending substantially about a perimeter of the member, adapted to receive and maintain sutures applied to secure the pump at an implantation site.
An infusion pump for implantation in a living body, the pump comprising:
- a housing having a collapsible fluid chamber to store infusate and an energy source to collapse the fluid chamber;
- an inlet conduit, having a self-sealing penetrable member positioned therein, located at a first position relative to the housing and in communication with the fluid chamber;
- an outlet conduit, extending between the fluid chamber and an output aperture;
- a bolus port, which includes a self-sealing penetrable member;
- a boot structure having:
- a first mating surface to receive the housing;
- and
- a bolus port receptacle, having an inlet passage and an outlet passage, to receive the bolus port, wherein the outlet passage is adapted to deliver infusate to a delivery site;
- and
- a connection conduit to extend between the inlet of the bolus port receptacle and the output aperture of the outlet conduit.
Dependencies are inferred from the claim text.