Composite wire guide construction
US5213111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Jul 10, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/09175
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wire guide construction for medical procedures that involve accessing specific inner body areas without major surgery. The wire guide comprises a mandrel which is a coaxial composite of a thin stainless steel wire radially surrounded by a shape memory alloy, such as a nickel titanium alloy. The mandrel is of a constant diameter over the majority of its length except it is tapered at its distal end to reveal the inner stainless steel wire. A flexible coil of platinum is attached near the distal end of the mandrel and is secured in place when a smoothly rounded tip is welded to the distal tip of the mandrel. The complete wire guide can be coated with a polymer layer, and 70 to 80% of the distal portion of the wire guide can be coated with a hydrophilic polymer to increase lubricity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.