When is it time to get emergency treatment?

1. How would you come to the aid of a person experiencing a severe nosebleed (epistaxis)? When is it time to get emergency treatment?

2. How would you respond to a person who suddenly complains of shortness of breath and chest pain? What possible pathologic conditions come to mind?

How would you respond to a person choking in a restaurant and obviously unable to dislodge the obstruction? Demonstrate the Heimlich maneuver. What if that person is a child; how would you adjust the procedure?