I recently had an episode in which a Home Health client was experiencing SOB, tachycardia and abnormal lung sounds. I instructed him that he needed to go to the ER related to his s/s and wanted to call 911 but he refused. He agreed for me to call his daughter, which I did and she arrived shortly. I explained and instructed the daughter regarding her father's condition and she ensured me she would take him in to the hospital. I learned he did go to the ER by ambulance which the daughter had called. The daughter is now threatening to sue because I did not call 911. Per my supervisor, whether or not to call 911 is a nursing call, however; I am now wondering whether that is correct. This client has recovered fully and is home but we are no longer seeing him due to the obvious issues. Any advice would be appreciated.