Sheath/obturator to facilitate insertion of medical devices into a patient's venous system
US5125902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Mar 2, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/1698
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A sheath and obturator is provided for facilitating the insertion of certain medical devices into a patient's vascular system, a vein, or venous system and in particular an in vivo extrapulmonary blood gas exchange device having a bundle comprised of a plurality of elongated gas permeable tubes being potted at each end and enclosed within a respective air tight proximal and distal chamber. The sheath is hollow and substantially tubular with a tapered receiving portion and a nontapered, curved entry portion. The obturator has a tip at the distal end of the obturator and a trip at the proximal end with an elongate member therebetween. The sheath is configured to receive the obturator in sliding engagement such that when the obturator is fully inserted within the sheath, the tip closes the opening at the entry end of the sheath and protrudes slightly therefrom. The obturator has a vent which provides a passage from space exterior to the sheath into the hollow interior of the sheath. The sheath and obturator are inserted into the patient through a single incision. Upon removal of the obturator from the sheath, a extrapulmonary blood gas exchange device may be inserted into and through …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.