Radially vented flashback chamber and plug assembly

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/14 (2006.01) A61M 5/162 (2006.01) A61M 25/06 (2006.01) A61M 39/06 (2006.01)

Patent

CA 2206215

A radially vented flashback chamber and plug assembly includes a plug seated in the proximal end of a flashback chamber. In one embodiment of this invention, the flashback chamber has an open proximal end and the plug has a closed proximal end, an open distal end, a lumen extending proximally from the open distal end, and a radially extending passageway located distal of the closed proximal end in communication with the lumen. A porous material is inserted into the lumen at the juncture between the lumen and the radially extending passageway to prevent blood leakage from the flashback chamber. One or more rings are located around the periphery of the plug proximal of the radially extending passageway to create a fluid tight seal between the flashback chamber and the barrel in which the flashback chamber is housed.

Dispositif de prise d'aération radiale avec chambre anti-retour dotée d'une prise reposant dans l'extrémité proximale d'une chambre anti-retour. Dans une transposition de la présente invention, la chambre anti-retour est munie d'une extrémité proximale ouverte, alors que la prise est munie d'une extrémité proximale fermée, d'une extrémité distale ouverte, d'un lumen s'allongeant de façon proximale à partir de l'extrémité distale ouverte, et d'un passage s'allongeant de façon radiale situé à une certaine distance de l'extrémité proximale fermée reliée au lumen. Un matériau poreux est inséré dans le lumen à la jonction située entre le lumen et le passage s'allongeant de façon radiale pour empêcher le sang de s'échapper de la chambre anti-retour. Un ou plusieurs anneaux entourent la périphérie de la prise proximale du passage s'allongeant de façon radiale pour créer un joint hermétique entre la chambre anti-retour et le cylindre dans lequel se trouve la chambre anti-retour.

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