Answer:
The medical technology which is not used commonly used today is D) Bloodletting.
Step-by-step explanation:
Bloodletting is the withdrawal of blood from a patient to prevent or cure a disease. This could be done by a physician or leeches. This is based on the system in which blood and other bodily fluids were regarded as "humors" that needed to remain in proper balance. Everything else is used in medical technology except for this. Hope this helped :)