What is the primary use of a speculum?

A speculum is primarily used to examine internal canals of the body, particularly in medical procedures involving the reproductive system and certain ear, nose, and throat examinations. Its design allows for the gentle dilation or separation of tissues, enabling healthcare providers to gain a clearer view of internal structures. For instance, a vaginal speculum is commonly utilized during gynecological exams to access and view the cervix, while an otoscope, which has a speculum-like structure, is used to examine the ear canal.

The other options provided do not align with the function of a speculum. Cleaning wounds involves the use of various medical instruments or materials, measuring blood pressure requires a sphygmomanometer, and temperature checks are conducted using thermometers. Each of these tools serves a specific purpose distinct from that of a speculum.