Which of the following is considered a dry heat application?

A dry heat application is one where no moisture is involved in the heat transfer process. An aquathermia pad, also known as a heating pad, provides localized heat through an insulated electric heat source without any water or moisture. It can effectively relieve muscle tension, improve circulation, and alleviate pain.

In contrast, hot compresses, hot soaks, and sitz baths all involve water in their applications. Hot compresses are wet, often using a cloth soaked in hot water to apply heat. A hot soak involves immersing the body or part of the body in hot water, while a sitz bath involves soaking the lower part of the body in water, typically for therapeutic purposes. These methods utilize moisture to conduct heat, making them unsuitable for classification as dry heat applications.