Is it permissible to restrain a patient in the intensive care unit and insert a urinary catheter for him without anesthesia, and should a patient be treated against his will if his condition is critical and he refuses treatment?

If there is a need to restrain a patient in bed in the intensive care unit for fear that they might harm themselves, there is no harm in that. As for inserting a urinary catheter without anesthesia, doctors are more knowledgeable about the situations that require anesthesia, and it is permissible to use anesthetic agents for treatment when needed. If there is a fear that the illness could lead to destruction or death, then it is legislated to compel the patient to undergo treatment.