Final answer:
The self-retaining retractor used in vaginal procedures is the Gelpi Retractor, which is specifically designed to maintain separation of the surgical site within smaller, confined spaces.
Step-by-step explanation:
The self-retaining retractor used in vaginal procedures is the Gelpi Retractor. Retractors are surgical instruments used to hold back underlying organs and tissues, so that body parts under the incision may be accessed. The Gelpi Retractor is designed with a self-retaining mechanism, which allows it to stay open without the need for a surgeon or assistant to hold it, thereby providing better visibility and access during the procedure. Although there are other retractors like the Richardson, Deaver, and Cushing Retractors, they are not specifically designed for vaginal procedures. The Gelpi Retractor is unique in its ability to maintain separation of the surgical site within smaller, confined spaces such as the vagina.