If indeed you experienced a panic attacks after surgery on your hip, you could be experiencing some kind of post-traumatic stress disorder. Both anesthesia and surgical trauma can cause post-operative psychiatric symptoms like those that you describe ... but these usually only last temporarily. For most operated patients, anesthesia or surgical intervention by itself does not cause any serious post-surgical psychiatric disorder. This means that you might have a predisposition to develop such a disorder and the operation was only a trigger. To learn more, you can consult a mental health specialist.