Toposcopic catheter and method of fabrication
US4604094A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1984 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Sep 6, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3435
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An everting catheter assembly includes a primary catheter tube inside which an everting or toposcopic element is secured spaced from the distal end of the primary catheter tube and with the open head end of the toposcopic element facing away from the open distal end of the primary catheter. The bonding of the toposcopic element to the interior of the primary catheter is effected with the use of a hollow mandrel through which the toposcopic element extends so that a short length of the toposcopic element projects out from the mandrel and is folded back over a length of the outer surface of the mandrel at the mandrel forward end. The mandrel is withdrawn into the primary catheter tube to the desired location for bonding at which point a bond is effected by means of heat conducted to the mating surfaces through the catheter wall or deposited locally by a radiative technique and heating between the mating surfaces. The tail end of the everting catheter is secured to a seal tube of greater rigidity by disposing the open tail end of the toposcopic element over a bias-cut end of the seal tube. Bonding is effected by application of heat to the mating surfaces. The bias-cut on the seal tube…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.