A. Deaver retractor.
B. Langenbeck retractor.
C. Army-Navy retractor.
D. Richardson retractor.
The surgical instrument shown in the picture above represents Richardson retractor.
Richardson retractor is a handheld, single end, right angle retractor used for holding back multiple layers of deep tissue. Often used in appendicectomy, Caesarean sections and laparotomy.
The blade is right angled, concave, and has a slight lip at the tip. The handle is hollow and features finger ridges for improved grip.