A. Richardson retractor.
B. Army-Navy retractor.
C. Langenbeck retractor.
D. Weitlaner retractor.
The surgical instrument shown in the picture above represents Weitlaner retractor.
Weitlaner retractor is a self-retaining, finger ring retractor with a cam ratchet lock used for holding back tissue and exposing a surgical site. The Weitlaner retractor is a popular instrument, most commonly used in basic plastic surgery, large bone and joint procedures, and mastoid surgeries. It is also useful with small, deep incisions and soft tissue dissection at a superficial level.