A physical therapist assistant is working with a patient who…

A physical therapist assistant is working with a patient who recently had a total knee replacement. The patient mentions they are experiencing increased pain during the exercises. The supervising physical therapist is currently busy with another patient. The physical therapist assistant believes the exercise protocol should be modified but has not received specific instructions regarding pain management for this patient. According to the legal framework of the State Practice Act, what should the physical therapist assistant do in this situation?