Final answer:
The nurse's statement to the client's mother is an example of false reassurance, a type of nontherapeutic communication that can hinder effective communication and trust.
Step-by-step explanation:
The nontherapeutic communication technique being used by the nurse in this scenario is false reassurance. By telling the client's mother that the surgeon has done the procedure a million times and that her son will be fine, the nurse is providing false comfort without addressing the mother's concerns or providing accurate information about the risks and benefits of the procedure. This type of communication can invalidate a person's feelings and create false hope, ultimately hindering effective communication and trust between the nurse and the client's mother.