Btw
In a medical context, HD most commonly refers to one of three things, depending on the specialty:
Hemodialysis: A treatment for kidney failure that uses a machine and a special filter (dialyzer) to clean wastes and excess fluid from your blood. Explore this treatment via the National Institute of Diabetes and Digestive and Kidney Diseases.
Huntington's Disease: A fatal, inherited genetic disorder that causes the progressive breakdown of nerve cells in the brain, affecting movement, thinking, and behavior. Read more on the Huntington's Disease Society of America.
High Dependency Unit: A hospital ward (often abbreviated as HDU or HD) for patients who require more intensive observation and nursing care than a standard ward, but not quite as much as the Intensive Care Unit (ICU).