Jun A Chen

US Patent:

20200397558, Dec 24, 2020

Filed:

Apr 5, 2017

Appl. No.:

16/090573

Inventors:

- Houston TX, US
Eric Yin - Arcadia CA, US
Valerie Pinillos - Houston TX, US
Jun Xin Chen - New York NY, US
Margaret Watkins - Houston TX, US
Allen Zhao - Carroltton TX, US

International Classification:

A61F 2/04
A61F 2/95

Abstract:

One aspect of the invention provides a removable ureteral stent including: an elongated stent with opposing curls at either end; a coil of memory material attached to a curl at one end of the stent that can uncoil and elongate under tensile force, and does so elongate and uncoil at a lower tensile force than that needed to induce substantial uncoiling of either curl, and wherein the coil is at least long enough such that its distal end (from the end attached to the stent) can pass through an internal urethral sphincter, when the stent is in place in the ureter; and a magnet attached to the distal end of the coil.