Nonreusable needle and catheter assembly
US5273540A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/0693
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A needle-safe flashback chamber for vascular/venous access devices wherein the needle cannula is automatically captured within a protective sheath upon being withdrawn from the patient to prevent accidental exposure of administering personnel to substantial health risk, such as that associated with the AIDS virus, hepatitis, and other infectious diseases is comprised of a needle cannula; a substantially transparent reservoir in fluid communication with the needle cannula; a vent formed in the cavity; and a substantially transparent sheath, sized and configured to slidably receive the needle cannula and cavity. The transparent reservoir can be partially withdrawn from the sheath, simultaneously withdrawing the needle cannula into the sheath. The needle cannula is attached to the cavity at an angled offset from the longitudinal axis of the cavity such that when the reservoir is withdrawn a sufficient distance from the sheath, the tip of the needle cannula will become axially misaligned with the needle cannula aperture formed therein, thereby preventing reextension of the needle cannula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.