There is no conceptual difference between lying and deception. No conceptual difference between lying a deception is drawn. Doctors ought to deceive.
Deception is good for the patients.
Most patients do not need to know the truth. Most are incapable of receiving the truth. A fundamental default position is that we must tell the truth. There is the general obligation of veracity and general presumption against lying and deception. Patient must know what the procedures are and what they are supposed to correct.