Uretheral catheter stent

Claim 2

An ureteral catheter stent comprises an elongated relatively flexible tubular member having at least one drainage opening extending through a wall thereof, the end portions of said tubular member are in the form of hooks, at least one of which has a closed end and the tubular member includes indicating means which indicate when the end portion is forcibly straightened the direction the closed end hook will extend when the portion is allowed to resume its normal shape.

Claim 3

The stent of claim 1 in which the tubular member is of substantially uniform outer diameter throughout its length.

Claim 4

The stent of claim 1 in which the tubular member is of a silicone elastomer material.

Claim 5

The stent of claim 1 in which both end portions have closed ends.

Claim 6

The stent of claim 1 in which the indicating means is an index stripe on the back of the hook portion having the closed end.

Claim 7

The stent of claim 1 in which the tubular member is of an unreinforced silicone elastomer having a durometer of about 70 Shore `A`.

Claim 8

The stent of claim 1 in which the hook portions are reinforced to increase resistance to migration.

Claim 9

The stent of claim 1 in which the hook portions extend in opposite direction.

Claim 10

A kit for providing urinary drainage comprising: (a) a wire stylet; and (b) a ureteral catheter stent comprising an elongated relatively flexible tubular member having at least one drainage opening extending through a wall thereof, said member having end portions set in the form of hooks at least one of which has a closed end, and indicating means associated with said member which indicates when the wire stylet is in lumen of the tubular member and the hook with the closed end is straightened which direction the hook will extend when the stylet is removed.

Claim 11

A kit for providing urinary drainage comprising: (a) a wire stylet; and (b) a ureteral catheter stent comprising an elongated relatively flexible tubular member having at least one drainage opening extending through a wall thereof, said member having end portions set in the form of hooks at least one of which has a closed end, and indicating means associated with said member which indicates when the wire stylet is in lumen of the tubular member and the hook with the closed end is straightened which direction the hook will extend when the stylet is removed.

Claim 12

The kit of claim 9 in which the tubular member is comprised of silicone elastomer having a durometer of about 70.

Claim 13

The kit of claim 9 in which both hook portions have closed ends.

Claim 14

The kit of claim 9 in which the hook portions extend in opposite directions.

Claim 15

The kit of claim 9 in which the stent is radio-paque to x-rays.

Claim 16

An indwelling ureteral catheter stent for use in maintaining urinary drainage in a patient, which stent compromises an elongated, flexible, tubular member having an internal lumen and an external wall of uniform outside diameter throughout its entire length, said member having a proximal end which is closed and set in the form of a hook, a relatively long straight intermediate section and a distal end which is also set in the form of a hook, said member having openings extending through its wall to provide a passage for fluid into the lumen and at least one opening at the distal end through which a wire stylet can be inserted into the lumen to straighten the member including the hooks so that the member can be cytoscopically inserted and positioned within the patient and through which the stylet can be removed when the stent is properly positioned so that upon removal the hooks will reform and prevent the member from migrating.

Claim 17

An indwelling ureteral catheter stent for use in maintaining urinary drainage in a patient, which stent compromises an elongated, flexible, tubular member having an internal lumen and an external wall of uniform outside diameter throughout its entire length, said member having a proximal end which is closed and set in the form of a hook, a relatively long straight intermediate section and a distal end which is also set in the form of a hook, said member having openings extending through its wall to provide a passage for fluid into the lumen and at least one opening at the distal end through which a wire stylet can be inserted into the lumen to straighten the member including the hooks so that the member can be cytoscopically inserted and positioned within the patient and through which the stylet can be removed when the stent is properly positioned so that upon removal the hooks will reform and prevent the member from migrating.