Venous return catheter
US4639252A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Apr 5, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0031
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A venous return catheter is provided having a first diameter distal portion suitable for insertion in a vena cava, a second, larger diameter proximal portion, and a transition portion forming a smooth transition between the first and second diameter portions. Drainage openings are provided in both the proximal and distal catheter portions. The catheter is of unitary construction, having a smooth bore through its entire length. It is also constructed from a soft, resilient material, but is reinforced with a harder, stiffer material in the region of the proximal drainage openings. The catheter may also be provided with wire reinforcement. The catheter is manufactured by a dip-molding process utilizing a male mandrel as a form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.