Abstract: A compression device for extracting blood from a finger comprises a plunger slidably retained within a handle and a flexible strap with a first end attached to the plunger and a second end attached to the handle. The flexible strap forms a loop encircling the finger. Sliding of the handle towards the plunger applies pulling tension on the second end of the flexible strap causing reduction in its perimeter and leading to applying circumferential compression of the finger positioned inside. Periodic application of finger compression and relaxation urges blood to be extracted from the finger and collected in a scalable container.