Patent ID: 7981101
Filing Date: 2011-07-19
Classification: A61J,A61M

Abstract:
1. A vial adapter for accessing a vial having a vial closure that includes a pierceable seal located over an opening of the vial, the adapter comprising: a housing having an attachment device to engage the vial for secure mounting of the vial adapter to the vial; a body portion having a medicament port and a vent port with a medicament lumen leading to the medicament port and a vent lumen leading to the vent port, the medicament and vent lumina being separate from each other; and a cannula located within the housing having a sharpened tip for piercing the seal of the vial closure to provide access to vial contents, the cannula having a medicament lumen in fluid communication with the body medicament lumen and a vent lumen in fluid communication with the body vent lumen, the cannula medicament lumen and cannula vent lumen having respective openings disposed on the sharpened cannula; wherein the cannula vent lumen has an inner wall and an outer wall, the inner wall is positioned closer with respect to the cannula medicament lumen than the outer wall is positioned with respect to the cannula medicament lumen, and wherein the cannula vent lumen is at least partially wrapped around the medicament lumen, and wherein the cross-sectional area of the cross-sectional shape of the cannula vent lumen is equal to or greater than the cross-section of the area of a cross-sectional shape of the cannula medicament lumen so that the flow rate of air through the body and cannula vent lumina is at least as great as a flow rate of medicament through the combination of the body and cannula medicament lumina.