Conical diffuser tip
First Claim
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1. An infusion device, comprising:
- a catheter tube; and
a generally conical diffuser disposed on a distal end of the catheter tube, the generally conical diffuser having an outer surface that generally increases in diameter from a proximal end of the generally conical diffuser to a distal end of the generally conical diffuser, the generally conical diffuser tip also having an inner surface that generally increases in diameter from the proximal end to the distal end, the diameter of the inner surface increasing at a higher rate than the diameter of the outer surface such that the width of a wall of the generally conical diffuser tip is greater at the proximal end than at the distal end.
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Abstract
A catheter assembly is provided having a conical diffuser tip for use in rapid infusion procedures. The conical diffuser tip provides a flared opening whereby the velocity of an infusant is decreased as the infusant travels through the catheter tip and exits into the vascular system of a patient. This decrease in velocity proportionately reduces the backpressure and/or recoil force of the catheter assembly thereby permitting the use of higher infusion rates. The catheter tip is introduced into the vasculature of a patient via a splittable introducer needle.
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Citations
20 Claims
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1. An infusion device, comprising:
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a catheter tube; and a generally conical diffuser disposed on a distal end of the catheter tube, the generally conical diffuser having an outer surface that generally increases in diameter from a proximal end of the generally conical diffuser to a distal end of the generally conical diffuser, the generally conical diffuser tip also having an inner surface that generally increases in diameter from the proximal end to the distal end, the diameter of the inner surface increasing at a higher rate than the diameter of the outer surface such that the width of a wall of the generally conical diffuser tip is greater at the proximal end than at the distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing an infusion device, the method comprising:
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providing a catheter tube; joining a generally conical diffuser tip to a distal end of the catheter tube, the generally conical diffuser tip including an outer surface that generally increases in diameter from a proximal end of the generally conical diffuser to a distal end of the generally conical diffuser, the generally conical diffuser tip also including an inner surface that generally increases in diameter from the proximal end to the distal end, the diameter of the inner surface increasing at a higher rate than the diameter of the outer surface such that the width of a wall of the generally conical diffuser tip is greater at the proximal end than at the distal end. - View Dependent Claims (9, 10, 11)
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12. An infusion apparatus comprising:
- a catheter; and
a generally conical diffuser tip attached to an end of the catheter, wherein an outer surface of the generally conical diffuser tip splays outwardly from a first diameter at a proximal end of the generally conical diffuser tip to a second diameter at a distal end of the generally conical diffuser tip, the distal end forming an outlet end, wherein the thickness of a wall of the generally conical diffuser tip is greater at the proximal end than at the distal end; and
the generally conical diffuser tip also having an inner surface that generally increases in diameter from the proximal end to the distal end, the diameter of the inner surface increasing at a higher rate than the diameter of the outer surface such that the width of a wall of the generally conical diffuser tip is greater at the proximal end than at the distal end. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
- a catheter; and
Specification