The ornamental design for an elevator for promotingextraction of blood sample from dried blood sample paper, as shown and described.
FIG. 1 is a front elevation of an elevator for promoting extraction of blood sample from dried blood sample paper, the opposing side view being identical in appearance.
FIG. 2 is a bottom view thereof.
FIG. 3 is a top view thereof.
FIG. 4 is a left side view thereof, the right side view being identical in appearance.
FIG. 5 is a bottom perspective view thereof; and,
FIG. 6 is a top perspective view thereof.
The broken lines in FIG. 6 showing a test tube depict environmental subject matter that forms no part of the claimed design.