Intravascular catheter having an adjustable length infusion section to delivery therapeutic fluid
First Claim
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1. A catheter for the intravascular delivery of therapeutic fluid, comprising:
- (a) an elongated catheter body having inner and outer tubular members which have distal ends sealingly secured together an annular lumen extending between the inner and outer tubular members to direct therapeutic fluid from the proximal end thereof to a fluid infusion section in a distal portion of the outer tubular member and means to pass therapeutic fluid from the annular lumen through the wall of the infusion section in the outer tubular member to the exterior of the catheter;
(b) an adapter on the proximal end of the catheter body for directing therapeutic fluids from a source thereof of the annular lumen in the catheter body; and
(c) means longitudinally movable with respect to the distal portion of the catheter body to adjust the effective length of the infusion section thereof.
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Abstract
An elongated catheter assembly for the intravascular delivery of therapeutic fluids which has an infusion section on the distal end for the discharge of fluids to the exterior of the catheter and an elongated sheath which moves longitudinally to vary the length of the infusion section through which treatment fluid can pass. The sheath preferably is elongated so that the position thereof can be adjusted from the proximal end of the catheter assembly. In this manner, the effective length of the infusion section can be adjusted to the length of the treatment site, such as a thrombus.
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Citations
12 Claims
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1. A catheter for the intravascular delivery of therapeutic fluid, comprising:
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(a) an elongated catheter body having inner and outer tubular members which have distal ends sealingly secured together an annular lumen extending between the inner and outer tubular members to direct therapeutic fluid from the proximal end thereof to a fluid infusion section in a distal portion of the outer tubular member and means to pass therapeutic fluid from the annular lumen through the wall of the infusion section in the outer tubular member to the exterior of the catheter; (b) an adapter on the proximal end of the catheter body for directing therapeutic fluids from a source thereof of the annular lumen in the catheter body; and (c) means longitudinally movable with respect to the distal portion of the catheter body to adjust the effective length of the infusion section thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. The catheter of claim wherein the catheter body comprises an outer tubular element an inner tubular element concentrically disposed therein which defines therebetween an annular lumen for directing therapeutic fluid to the infusion section.
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12. The catheter of claim 12 wherein the outer tubular member has on the proximal end thereof means to sealingly engage the exterior of the sheath.
Specification