1 Add 10 drops of Benedicts solution to each test tube. 2  Place the test tubes in the hot-water bath. Heat the test tubes for 3 to 5 minutes, or until the indicator changes color, if it changes color.  With a test tube holder, remove the tubes from the hot-water bath and place them back in the test tube rack.
Prostate Ultrasound. Prostate Ultrasound. Definition. A prostate ultrasound is a diagnostic test used to detect potential problems with a man's prostate. An ultrasound test uses very high frequency sound waves that are passed through the body. The pattern of reflected sound waves, or echoes, shows the outline of the prostate.
Most ultrasounds are done using a transducer on the surface of the skin. In a transvaginal ultrasound, a transducer wand is placed in a womanâs vagina to get better images of her uterus and ovaries. A transrectal ultrasound is sometimes used in the diagnosis of prostate conditions.