It's almost certainly "Deth".

Autoclaves are like high-pressure ovens. They heat up to extremely high temperatures, and very high pressures. I've seen them used in manufacturing to "bake" carbon composite/resin molds into harder-than-steel components. I can't imagine what they would be used in a hospital for.

Urology is the medical field for urinary tract stuff - the bladder, genitals, etc.