Which of the following drains are used to retract the spermatic cord during an inguinal hernia repair?

The correct choice is Penrose drain. In the context of an inguinal hernia repair, the Penrose drain is specifically designed to provide retraction and support the spermatic cord during the surgical procedure. Its flat, flexible design allows it to be placed effectively around structures to help keep them organized and out of the surgical field.

Inguinal hernia repairs require careful manipulation of the spermatic cord and surrounding tissues, and the Penrose drain offers a simple, effective means to maintain this retraction. This minimizes the risk of injury to nerves and vascular structures in the area. The other types of drains, such as Jackson-Pratt, bulb suction, and Hemovac, are typically used for different purposes, such as managing post-operative drainage of fluids, and do not offer the same structural support for retraction during surgery. Therefore, the use of the Penrose drain is pivotal in maintaining the integrity of surgical visibility and access during an inguinal hernia repair.