Variable length uretheral stent
US5681274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Mar 31, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A variable length ureteral stent assembly. A central catheter tube forms a ureter stent with a retention structure for anchoring the stent in the ureter particularly within the bladder and kidney. The catheter tube is formed of a shape memory material and at least one of the retention structures includes a end portion of the catheter wrapped spirally into a multiple-turn planar coil having an axis that is transverse to the plane of the structure. The retention structure can then be partially unwound while still providing an anchoring function. Partially unwinding increases the length of an intermediate section of the ureteral stent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.