The ornamental design for a single-shield, bi-directional-barb, double-strand-twist suture, as shown and described.
FIG. 1 is a side elevation view of a single-shield, bi-directional-barb, double-strand-twist suture in accordance with the invention showing an expanded side elevation view of a a representative, repeating segment thereof, wherein all sides (front, rear, left side, right side) are identical, just shifted in phase (both axially and circumferentially) as they progress with respect to a central axis with respect to one another;
FIG. 2 is a perspective view thereof, with one strand in a coated condition and one strand in a non-coated condition;
FIG. 3 is a cross-sectional view thereof (taken at the section 3-3 as shown), in the coated condition, an upward-looking view being a mirror image thereof; and,
FIG. 4 is the same cross-sectional view thereof, in an uncoated condition (before coating and after coating dissolving), an upward-looking view being a mirror image thereof.
The broken lines showing selected features are for the purpose of illustrating environment and context of the article and form no part of the claimed design.