Catheters
AssigneeAN-GO-GEN Inc.
InventorsAnatoly Langer, Duncan John Stewart
Life of this patent
Estimating the term…
Abstract
A catheter assembly especially adapted for injecting therapeutic liquids such as DNA solutions to a patient's myocardium comprises an elongated guiding catheter for insertion through a patient's artery to the vicinity of the myocardium, a reservoir for therapeutic liquid at the distal end of the guiding catheter, one or more injection needles protruding from the distal end of the guiding catheter and in fluid communication with the reservoir, the extent of needle protrusion being appropriate for penetration of but not passage through the myocardial wall, and an operating device for delivering a predetermined quantity of therapeutic liquid from the reservoir through the needles.
Claims13
A catheter assembly comprising:
- an elongated flexible biocompatible tube constituting a guiding catheter and having a proximal end portion and a distal end portion;
- a reservoir adapted to contain treatment fluid and disposed in the distal end portion of the guiding catheter;
- a guide wire extending through the reservoir to protrude beyond the distal end of the guiding catheter;
- at least one needle adapted to protrude from the reservoir and beyond the distal end of the guiding catheter to a predetermined extent;
- said at least one needle having a bore with an inlet communicating with the reservoir and an outlet disposed distally beyond the distal end of the guiding catheter;
- operating means for delivering a predetermined quantity of treatment fluid from the reservoir through the needle outlet;
- and an operating wire extending axially through the guiding catheter from the proximal end thereof to the reservoir, said operating wire connecting the reservoir to the operating means.
A catheter assembly comprising:
- an elongated flexible biocompatible tube constituting a guiding catheter and having a proximal end portion and a distal end portion;
- an injection catheter disposed within the guiding catheter;
- a reservoir adapted to contain treatment fluid and disposed within the injection catheter and at the distal end portion of the guiding catheter, said reservoir being defined by deformable side walls;
- at least one needle adapted to protrude from the reservoir and beyond the distal end of the guiding catheter to a predetermined extent;
- said at least one needle having a bore with an inlet communicating with the reservoir and an outlet disposed distally beyond the distal end of the guiding catheter;
- operating means for delivering a predetermined quantity of treatment fluid from the reservoir through the needle outlet, said operating means comprising a source of fluid pressure applicable to the exterior of the deformable side walls of the reservoir to effect compression thereof for delivering said predetermined quantity of treatment fluid.
Dependencies are inferred from the claim text.