Atherectomy catheter
US5669920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1996 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Mar 20, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/0053
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An improved atherectomy catheter and methods of making and using a catheter are disclosed. In one embodiment, the catheter comprises a housing shaft having a torsionally-reinforced outer layer concentrically disposed over a polymeric inner layer, with an inflation tube disposed concentrically over the housing shaft to define an annular inflation lumen. A housing is attached to the distal end of the housing shaft, and may contain interventional means such as a cutting blade. The balloon for urging the housing against a vessel wall, such as a balloon, is attached to the housing opposite the interventional means and is in communication with the inflation lumen. A drive shaft may be rotatably disposed through a longitudinal lumen in the housing shaft, the drive shaft being coupled at its distal end to the interventional balloon. The method of the invention facilitates construction of a catheter shaft through the steps of forming a flexible tubular polymeric outer layer with a first melting point over a tubular polymeric inner layer with a second melting point, the first melting point being lower than the second melting point; heating the outer layer to at least the first melting point …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.