One step catheter advancement automatic needle retraction system
US5911705A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1998 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | May 8, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3226
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The one step catheter advancement automatic needle retraction system of this invention includes a generally hollow barrel, a needle hub which can include a flashback chamber disposed in the barrel, a secondary flashback chamber disposed in the barrel, a biasing mechanism for retracting the needle into the barrel and a clip associated with the secondary flashback chamber for engaging a catheter hub. The needle hub in conjunction with the secondary flashback chamber retain the needle in the extended position against the force of the biasing mechanism until the catheter has been advanced a certain distance from the distal end of the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.