Angiographic and arteriographic catherters

Claim 2

An angiographic catheter including an elongated tube provided at one end with a tapered tip and means for discharging a bolus of fluid of uniform density adjacent the tip, including a plurality of sets of peripheral discharge openings in the tube, each set being longitudinally spaced from each other set, each set of openings comprising a plurality of openings in radial registration, and the cumulative amount of open area in one set of discharge openings being greater than the cumulative amount of open area in the set of discharge openings next closet to the tip.

Claim 3

The catheter of claim 1 in which the discharge openings in each set are equiangularly spaced with respect to each other.

Claim 4

The catheter of claim 1 in which the discharge openings in each set are equiangularly spaced with respect to each other and there are at least four discharge openings in each set.

Claim 5

The catheter of claim 3 in which the discharge openings in every other set of discharge openings are in registration along imaginary lines which are parellel to the longitudinal axis of the tube.

Claim 6

The catheter of claim 5 in which each discharge opening is in the shape of an elongated slot with rounded corners.

Claim 7

A catheter comprising an elongated tube provided at one end with a tapered tip having a small centrally located end hole, said tip also being provided internally with a narrow neck which is spaced from the end hole to define a chamber between the neck and the end hole, said tip also including a plurality of openings located adjacent the tip rearwardly of the end hole and in communication with the chamber, said tube also being provided rearwardly of the neck with a plurality of sets of distal openings, each of such sets comprising a plurality of similarly sized openings in radial registration and each set being axially spaced longitudinally along the tube from each other set, the size of the distal openings in each set being larger than the size of the distal openings of the other sets closer to the tip but smaller than the size of the distal openings of the sets farther from the tip.

Claim 8

A catheter comprising an elongated tube provided at one end with a tapered tip having a small centrally located end hole, said tip also being provided internally with a narrow neck which is spaced from the end hole to define a chamber between the neck and the end hole, said tip also including a plurality of openings located adjacent the tip rearwardly of the end hole and in communication with the chamber, said tube also being provided rearwardly of the neck with a plurality of sets of distal openings, each of such sets comprising a plurality of similarly sized openings in radial registration and each set being axially spaced longitudinally along the tube from each other set, the size of the distal openings in each set being larger than the size of the distal openings of the other sets closer to the tip but smaller than the size of the distal openings of the sets farther from the tip.

Claim 9

The catheter of claim 6 in which each of the discharge openings in said chamber is constructed in such manner as to direct the outward flow of the contents of the chamber away from the tip in a direction substantially opposite to the direction of flow through the end hole.

Claim 10

The catheter of claim 7 in which there are at least four discharge openings.

Claim 11

The catheter of claim 7 in which there are at least four discharge openings and each of the openings are in radial registration and equiangularly spaced.

Claim 12

The catheter of claim 6 in which there are the same number of distal openings in each set and the distal openings in each set are regularly spaced with respect to each other.

Claim 13

The catheter of claim 10 in which the distal openings of every other set are in registration along imaginary lines which are parallel to the axis of the tube.

Claim 14

The catheter of claim 10 in which the distal openings of every other set are in registration along imaginary lines which are parallel to the axis of the tube and the distal openings of the sets therebetween are located centrally between the adjacent distal openings of the next closed set.

Claim 15

An angiographic catheter for transmitting material, said catheter comprising an elongated tube and means for balancing hydraulic discharge forces therefrom to prevent whipping and axial movement of said catheter tube during said discharge including, a plurality of forwardly and rearwardly axially directed distal discharge holes located near one end of said tube and also being provided with a tapered tip at said end, said distal holes being located about the longitudinal axis and in the tip of the tube preselectively sized and directed in such manner that the sum of the radial forces created by the discharge of the material through the distal holes is sUbstantially zero.

Claim 16

An angiographic catheter for transmitting material, said catheter comprising an elongated tube and means for balancing hydraulic discharge forces therefrom to prevent whipping and axial movement of said catheter tube during said discharge including, a plurality of forwardly and rearwardly axially directed distal discharge holes located near one end of said tube and also being provided with a tapered tip at said end, said distal holes being located about the longitudinal axis and in the tip of the tube preselectively sized and directed in such manner that the sum of the radial forces created by the discharge of the material through the distal holes is sUbstantially zero.