Extended fenestration catheter with internal coil and method of making the same
First Claim
1. A catheter for providing uniform fluid delivery to an anatomical site of a patient, comprising:
- an elongated tube having an open proximal end and a closed distal end and including a catheter wall having an inner surface with a lumen bound by said inner surface between said proximal and distal ends;
a plurality of openings defined in said catheter wall for discharging fluid from said lumen to the anatomical site of the patient; and
a coil disposed within said lumen and including spaced convolutions in an unstretched state, said coil including a distal end fixed to said distal end of said elongated tube and extending unattached in said lumen along a length thereof to a proximal end with said coil being spaced from said inner surface of said catheter wall along said length to define an annular flow space therewith.
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Accused Products
Abstract
A catheter for delivering medication from a fluid source to an anatomical site of a patient and a method of manufacturing the same are provided. The catheter comprises an elongated tube extending between an open proximal end and a closed distal end. The elongated tube includes a catheter wall having an inner surface that bounds a lumen for conveying the fluid from the fluid source. A plurality of openings are defined in the catheter wall to discharge the fluid from the lumen to the anatomical site. A reinforcing coil is disposed within the lumen to improve fluid delivery and provide kink resistance to the catheter. The reinforcing coil has spaced convolutions in an unstretched state. An annular flow space is defined between the reinforcing coil and the inner surface of the catheter wall. As a result, fluid can travel both through an inner lumen of the reinforcing coil and between the spaced convolutions to the annular flow space or the fluid can travel directly through the annular flow space to reach the openings.
107 Citations
20 Claims
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1. A catheter for providing uniform fluid delivery to an anatomical site of a patient, comprising:
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an elongated tube having an open proximal end and a closed distal end and including a catheter wall having an inner surface with a lumen bound by said inner surface between said proximal and distal ends;
a plurality of openings defined in said catheter wall for discharging fluid from said lumen to the anatomical site of the patient; and
a coil disposed within said lumen and including spaced convolutions in an unstretched state, said coil including a distal end fixed to said distal end of said elongated tube and extending unattached in said lumen along a length thereof to a proximal end with said coil being spaced from said inner surface of said catheter wall along said length to define an annular flow space therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of manufacturing a catheter having an elongated tube defining a lumen and a plurality of openings therein to convey fluid to an anatomical site of a patient with a coil disposed within the lumen to provide uniform fluid delivery and kink resistance, the coil being spaced from an inner surface of the elongated tube by a spacer tube to define an annular flow space between the inner surface and the coil, said method comprising the steps of:
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positioning the coil within the lumen of the elongated tube;
positioning the spacer tube over a distal end of the coil and inserting the spacer tube between the coil and the inner surface of the elongated tube to define the annular flow space; and
embedding the distal end of the coil in the distal end of the elongated tube once the coil is positioned within the lumen, once the spacer tube is positioned over the distal end of the coil, and once the spacer tube is inserted between the coil and the inner surface of the elongated tube at the distal end of the elongated tube. - View Dependent Claims (20)
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Specification