Tension guide and dilator
US5312360A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1993 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Mar 18, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3488
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dilator assembly for forming and enlarging percutaneous penetrations into body cavities includes an elongate guide member and one or more elongate dilation members. The guide member includes a retractable anchor near its distal end so that an outward force or tension may be maintained on the body cavity wall as successfully larger dilators are introduced over the guide member. In this way, the alignment of the guide member is maintained along the initial penetration and the tendency for the wall of the body cavity to separate from and invaginate into the surrounding fascia is reduced. Alternatively, means may be provided for internally tensioning or stiffening the guide member so that the guide member will remain aligned and resist withdrawal, buckling, and kinking as a dilator or working catheter is introduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.