Patent ID: 11931148
Assignee: BECTON, DICKINSON AND COMPANY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 3:
4. The catheter system of claim 1, wherein the plug further comprises a tubular section disposed between the distal end of the plug and the proximal end of the plug, wherein the distal end of the plug comprises a neck portion extending from the tubular section and a skirt extending from the tubular section to define an annular channel between the skirt and the neck portion, wherein the neck portion is inserted into the proximal end of the needle hub, wherein a portion of a wall of the tubular section comprises a hole, a hydrophobic membrane disposed within the hole towards an outside of the plug, and a hydrophilic membrane within the hole towards an inside of the plug, wherein the hydrophilic membrane prevents fluid leakage through the hole, wherein the hydrophobic membrane provides venting of the flashback chamber.