Which of the following describes a walker?

A walker is primarily designed as a mobility aid that provides stable support for individuals who may have difficulty walking independently due to injury, surgery, or a medical condition affecting their mobility. Walkers typically have a frame with four legs and handgrips, allowing users to safely lean on the device while taking steps. This stable support can improve balance and reduce the risk of falls, making it an essential tool in patient care for those requiring assistance with movement.

In contrast, the other options do not accurately describe the function or purpose of a walker. A walker does not require full upper body strength; instead, it supports users who may have limited strength. It is not a tool for measuring blood pressure, which requires specific instruments like a sphygmomanometer. Additionally, a walker is not considered surgical equipment; it is a rehabilitative device used after surgery or during recovery. Therefore, the description of a walker as a mobility aid for stable support is both accurate and reflective of its primary purpose in patient care.