Microbore catheter with velocity reducing chamber

Details Microbore catheter with velocity reducing chamber Microbore catheter with velocity reducing chamber

1998-10-13

2000-10-31

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604264, 604523, A61M 2500

Patent

active

061395390

ABSTRACT:
A catheter having minimal dead volume due to a "micro" or very small internal diameter for the majority of its length. The distal tip of the catheter, which is the end disposed within the body proximate the location at which the pharmaceutical agent or other fluids are to be delivered, includes a chamber, compartment or other relatively wider internal diameter section, so that the internal diameter rapidly expands in the transitional region between the proximal portion of the catheter (with the very small or micro internal diameter) and the distal portion of the catheter (which includes the catheter tip). The expanding internal diameter causes the velocity of fluid being delivered to decrease prior to its ejection through a distal opening. Also disclosed is a fluid delivery system comprising a stylet lumen separate from a delivery lumen. Separate stylet and delivery lumens permit these different portions of the catheter to be independently constructed to maximize the suitability of each lumen for its intended purpose. The catheter of the present invention may be employed within fully implantable or partially implantable applications depending upon the type of fluid supply device used to introduce fluids into the catheter for delivery to the distal tip disposed at the fluid ejection site.

REFERENCES:
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patent: 5637102 (1997-06-01), Tolkoff et al.
patent: 5820610 (1998-10-01), Baudino

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