Drug delivery system
AssigneeTarget Therapeutics, Inc.
InventorsGene Samson, Erik T. Engelson, Hiram Chee, Robert E. Woodard
Life of this patent
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Abstract
This invention is a surgical instrument and specifically is a catheter for treating a target site by delivering a controlled amount of a therapeutic or diagnostic agent (the target site being accessible by a tortuous path through the vasculature), the perfusion tip assembly on first catheter, and a process of using that catheter to deliver fluids to the selected vascular site.
Claims68
A fluid delivery tip for delivery of fluid through a catheter, said tip having a proximal end adapted to connect to a catheter body, a distal end, and an axis extending between said proximal and distal ends, comprising a stiffener and a perfuser:
- said stiffener extending axially between the proximal tip end and the distal tip end, having an inner stiffener surface and an outer stiffener surface, which stiffener is stiffer than the perfuser, and having openings to allow fluid flow from the inner stiffener surface to the outer stiffener surface at a high index flow rate, and
- said perfuser having an inner perfuser surface, an outer perfuser surface, located at and which is in contact with the outer stiffener surface, coaxial to the stiffener and extending axially between the proximal tip end and the distal tip end and adapted to allow fluid flow from the outer stiffener surface to the outer perfuser surface at an index fluid flow rate relatively lower than the stiffener index flow rate.
A catheter assembly comprising:
- a catheter body of an elongate tube with a proximate and a distal end with an open lumen extending between the proximate and distal catheter body, and
- a fluid delivery tip for delivery of fluid supplied through the catheter body lumen, said tip having a proximal and a distal tip end having a stiffener and perfuser,
- said stiffener extending axially between the proximal tip end and the distal tip end, having an inner stiffener surface and an outer stiffener surface, which stiffener is stiffer than said perfuser, and having openings to allow fluid flow from the inner stiffener surface to the outer stiffener surface at a high index flow rate, and
- said perfuser having an inner perfuser surface, an outer perfuser surface, which perfuser is located at the outer stiffener surface, coaxial to and which is in contact with the stiffener and extending axially between the proximal tip end and the distal tip end and adapted to allow fluid flow from the outer stiffener surface to the outer perfuser surface at an index fluid flow rate relatively lower than the stiffener index flow rate.
A fluid delivery tip for delivery of fluid through a catheter, said tip having a proximal end adapted to connect to a catheter body, a distal end, and an axis extending between said proximal and distal ends, comprising a stiffener and a perfuser:
- said stiffener extending axially between the proximal tip end and the distal tip end, having an inner stiffener surface and an outer stiffener surface, which stiffener is stiffer than said perfuser, and having openings to allow fluid flow from the inner stiffener surface to the outer stiffener surface, and
- said perfuser comprising a woven filamentary tube having an inner perfuser surface, an outer perfuser surface, located at the outer stiffener surface, coaxial to the stiffener and extending axially between the proximal tip end and the distal tip end and adapted to allow fluid flow from the outer stiffener surface to the outer perfuser surface.
A catheter assembly comprising:
- a catheter body of an elongate tube with a proximate and a distal end with an open lumen extending between the proximate and distal catheter body, and
- a fluid delivery tip for delivery of fluid supplied through the catheter body lumen, said tip having a proximal and a distal tip end having a stiffener and a perfuser,
- said stiffener extending axially between the proximal tip end and the distal tip end, having an inner stiffener surface and an outer stiffener surface, which stiffener is stiffer than said perfuser, and having openings to allow fluid flow from the inner stiffener surface to the outer stiffener surface, and
- said perfuser comprising a woven filamentary tube having an inner perfuser surface, an outer perfuser surface, located at the outer stiffener surface, coaxial to the stiffener and extending axially between the proximal tip end and the distal tip end and adapted to allow fluid flow from the outer stiffener surface to the outer perfuser surface.
Dependencies are inferred from the claim text.