Indwelling ureteral stent placement apparatus
US4957479A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Oct 17, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M27/008
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An indwelling ureteral stent positioning apparatus is provided for allowing single intrusion placement of a stent in the ureter of a patient. The apparatus is pre-assembled and includes a wire guide with floppy tip. The stent is positioned about the wire guide adjacent to the floppy tip of the wire guide, and is adjustably situated on the wire guide to expose a pre-determined length of the floppy tip for insertion into the patient. The stent is a dual open-ended tubular stent having a resilient retentive curved circular or pigtail shape at each end for retention in the kidney and bladder. A positioner is conveyed on the wire stent until the end of the positioned abuts the anatomically distal end of the stent. A pin-vise clamp abuts the external end of the positioner and releasably engages the wire guide to stabilize the apparatus during insertion. When used to position the stent within the ureter, the apparatus is conveyed along the ureter until the floppy tip is within the renal collecting system. The positioner is advanced along the wire guide to push the anatomically proximal end of the stent over and beyond the floppy tip so that the retentive coil forms within the kidney. The …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.