Stent for ureter

Details Stent for ureter Stent for ureter

1990-10-25

1993-01-05

Hafer, Robert A.

Surgery

Devices transferring fluids from within one area of body to...

604281, 604 9, 604 10, A61M 2500

Patent

active

051766256

ABSTRACT:
A ureteral stent is nominally straight, but is provided with a coil adjacent one end to prevent migration. The coil portion is straightened upon insertion into the ureter on a guide wire, and is supposed to coil after insertion to prevent migration. An electronic signal is provided when such coiling does take place, and is applied to externally human descernable structure such as a meter. Various embodiments of the invention are disclosed, and may include a metallic cylinder embedded in the end of the stent and disposed adjacent a coil within the straight portion of the stent for inductive relation when the coiled portion has properly coiled following insertion.

REFERENCES:
patent: 4610657 (1986-09-01), Densow
patent: 4713049 (1987-12-01), Carter
patent: 4764114 (1988-08-01), Jeffcoat et al.
patent: 4790809 (1988-12-01), Kuntz
patent: 4820262 (1989-04-01), Finney
patent: 4874360 (1989-10-01), Goldberg et al.
patent: 4950228 (1990-08-01), Knapp, Jr. et al.
patent: 5052998 (1991-10-01), Zimmon

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