The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 1994
Filed:
Feb. 05, 1993
Mary B Clinton, Pearl River, NY (US);
Frederick C Houghton, Sussex, NJ (US);
Joseph J Gregg, Hasbrouck Heights, NJ (US);
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Abstract
Apparatus and method are provided for containing blood flashback during insertion of a guide wire into a blood vessel. The apparatus includes a barrel having a flashback chamber. An inner cannula in the flashback chamber communicates with an inserter needle mounted on the barrel. The inner cannula includes an aperture communicating with the flashback chamber. A porous vent plug is slidably disposed in the chamber in fluid-tight engagement with both the barrel and the inner cannula. The vent plug can be slid from a proximal position where the aperture in the inner cannula is exposed to a distal position where the aperture in the inner cannula is blocked. A guide wire in the inner cannula blocks blood flow. The vent plug and the guide wire are retained proximally of the aperture in the inner cannula until blood flashback is observed. The vent plug is then axially advanced to cover the aperture and stop further blood flow. The guide wire can then be advanced safely into the blood vessel.