Anurse informed john that she was about to take blood from his antecubital region. what part of the body is she referring to? later, she came back and said that she was going to give him an antibiotic shot in his deltoid region. did he take off his shirt or drop his pants to get the shot?

The part of the body which the nurse is referring to is the back of John's elbow.

John had to take his shirt off when the nurse was giving him antibiotics which is from his deltoid region.

The reason for John removing his shirt is because the part is around the shoulder.

The nurse before leaving he noticed that John had bluish and black part on his left region which is on the left calf.

your spelling is a little off : ]