Stent having time-release indicator

摘要

A medical device includes an elongate body configured to be disposed within a urinary tract of a patient such that a first end portion of the elongate body is disposed at a first location of the urinary tract and a second end portion of the elongate body is disposed at a second, different location of the urinary tract. The elongate body defines a lumen that is configured to convey urine from the first location of the urinary tract to the second location of the urinary tract. An agent is formulated to visually alter urine of the patient, the agent is coupled to the elongate body and releasable into the patient's urine.

主权项

1. A medical device, comprising:
a ureteral stent including an elongate body, the elongate body being configured to be disposed within a urinary tract of a patient such that a first curved retention member of the elongate body is disposed in a kidney of the patient to help retain the medical device in place within the urinary tract and a second curved retention member of the elongate body is disposed in a bladder of the patient to help retain the medical device in place within the urinary tract, the elongate body defining a lumen, the lumen being configured to convey urine from the kidney to the bladder; a release element including a base member and a barrier member, the barrier member disposed around the base member, the barrier member formed with a biodegradable material, the barrier member and the base member collectively defining a reservoir therebetween; a liquid agent disposed within the reservoir, the agent formulated to visually alter urine of the patient upon degradation of the barrier member by contact with the patient's urinary tract or urine therein; and a tether having a first end portion coupled to the second curved retention member of the elongate body and a second end portion coupled to the release element, the tether being configured to allow the release element to move with respect to the elongate body.