Back to results
US 6,955,657 B1Granted
Intra-ventricular substance delivery catheter system
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorWilliam Earl Webler
Life of this patent
Estimating the term…
Abstract
A guide catheter and a needle catheter are disclosed. The guide catheter construction provides for maximum articulation of the deflectable tip and maximum torque response during rotation. The needle catheter may include a release mechanism that imparts a sudden force to the needle in order to facilitate tissue penetration.
Claims26
An apparatus comprising:
- a handle;
- a flexible body portion coupled to the handle, the flexible body portion having dimensions suitable for insertion into and navigation through a body, the flexible body portion defining a lumen therethrough and having a distal portion and a proximal portion, wherein the proximal portion comprises:
- a flexible element disposed around the lumen, and
- a braid disposed over the flexible element;
- a first plastic coating impregnated into the proximal portion of the flexible body portion;
- a second plastic coating impregnated into the distal portion of the flexible body portion;
- an anchor element disposed in the distal portion of the flexible body portion;
- a tendon wire having a distal end coupled to the anchor element and a proximal end coupled to the handle such that manipulation of the handle results in deflection of the distal portion of the flexible body portion;
- and
- an electrical interface electrically coupled to the tendon wire, wherein the anchor element and the tendon wire each comprise electrically conductive material such that an instrument can receive an electrical signal from the tendon wire through the electrical interface.
7 more elements
A substance delivery system comprising:
- a guide catheter comprising
- a handle;
- a flexible body portion coupled to the handle, the flexible body portion having dimensions suitable for insertion into and navigation through a body, the flexible body portion defining a lumen therethrough and having a distal portion and a proximal portion, wherein the proximal portion comprises
- a flexible element disposed around the lumen, and
- a braid disposed over the flexible element;
- a first plastic coating impregnated into the proximal portion of the flexible body portion;
- a second plastic coating impregnated into the distal portion of the flexible body portion;
- an anchor element disposed in the distal portion of the flexible body portion;
- and
- a tendon wire having a distal end coupled to the anchor element and a proximal end coupled to the handle such that manipulation of the handle results in deflection of the distal portion of the flexible body portion;
- and
- a needle catheter to be disposed within the lumen of the guide catheter such that a distal end of the needle catheter can protrude from an opening in the distal end of the guide catheter, the needle catheter comprising
- a duplex spring impregnated with a third plastic coating,
- a braided shaft disposed over the duplex spring,
- a needle coupled to an inner diameter of the duplex spring,
- an electrode coupled to the distal end of the needle catheter, the electrode having an opening through which the needle is movable between a retracted position and a deployed position,
- an electrical insulator disposed between the needle and the electrode, and
- a needle control assembly comprising
- an elastically deformable element coupled to at least one of the duplex spring and the braided shaft of the needle catheter, and
- a release mechanism which releasably engages the elastically deformable element when the elastically deformable element is in a position which corresponds to the needle being in the retracted position.
17 more elements
Dependencies are inferred from the claim text.