Apparatus and method for vascular guide wire insertion with bloo

Details Apparatus and method for vascular guide wire insertion with bloo Apparatus and method for vascular guide wire insertion with bloo

1993-02-05

1994-03-22

Hirsch, Paul J.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604167, A61M 500

Patent

active

052959708

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.

REFERENCES:
patent: 4020835 (1977-05-01), Nordstrom et al.
patent: 4193399 (1980-03-01), Robinson
patent: 4904240 (1990-02-01), Hoover
patent: 5032116 (1991-07-01), Peterson et al.
patent: 5066284 (1991-11-01), Mersch
patent: 5098395 (1992-03-01), Fields
patent: 5108375 (1992-04-01), Harrison et al.
patent: 5120319 (1992-06-01), Van Heugten et al.
patent: 5242414 (1993-09-01), Kischell et al.

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