Night Screams(1981)

Beautiful Lina is gravely ill and in a coma so her husband decides to take her to a professor / supernatural researcher who has a collection of ghosts and monsters as research objects. Unfortunately, the professor’s research is tainted by his corrupt assistant so when Mrs. Lina needs blood, she is given a tainted blood transfusion which is the blood of Mrs. Kemangmang... a spirit who likes to suck human brains.