Final answer:
The nurse should immediately report a blood pressure of 80/40mm Hg to the physician.
Step-by-step explanation:
The nurse should immediately report the following physical finding to the physician: Blood pressure of 80/40mm Hg.
Severe anorexia nervosa can lead to abnormally low blood pressure, which is a sign of potential heart failure. This is a serious medical concern that requires immediate attention from a physician.