Device and method for collecting a blood sample

摘要

A vent plug is disclosed that includes a body having a distal end, a proximal end, and a lumen extending through the distal and proximal ends. A membrane is disposed across the lumen, the membrane being hydrophobic and air permeable. A fluid chamber is formed within the lumen distal the membrane. A distal lumen opening being shaped and sized to retain blood within the lumen until the internal pressure of the lumen increases in response the a finger pressing against a proximal lumen opening.

主权项

1. A vent plug comprising:
a body having a distal terminal end, a proximal terminal end, and a lumen extending from the distal terminal end to the proximal terminal end to form a distal lumen opening at the distal terminal end and a proximal lumen opening at the proximal terminal end; a membrane having an inner surface and an outer surface, the membrane being disposed at the proximal terminal end of the body and continuously across an entire width of the proximal lumen opening of the lumen, the membrane configured to prevent passage of blood through the membrane, the membrane being hydrophobic and air permeable, the membrane coupled to the proximal terminal end of the body, the membrane comprising a depressable exposed portion that is biased to bulge proximally out from the proximal lumen opening such that a portion of the inner surface of the membrane is positioned proximal to the proximal lumen opening; and a fluid chamber formed within the lumen distal the membrane for collecting the blood, the inner surface of the membrane forming a wall of the fluid chamber such that a portion of the fluid chamber is positioned proximal to the proximal lumen opening, wherein the depressable exposed portion of the membrane is configured to depress distally into a depressed position when pressed by a finger, the depressing of the depressable exposed portion into the depressed position reducing a volume of the fluid chamber thereby causing the blood within the fluid chamber to be expelled through the distal lumen opening.