Man With Severe Shoulder Pain Brita E. Zaia, MD, Philippa N. Soskin, MD, MPP  Annals of Emergency Medicine  Volume 63, Issue 5, (May 2014) DOI: 10.1016/j.annemergmed.2013.09.001 Copyright © 2014 American College of Emergency Physicians Terms and Conditions

Figure 1 Ultrasonographic probe position on posterior left shoulder. The blue circle represents the direction of the probe indicator, and the black oval represents the position of the ultrasonographic probe footprint. Annals of Emergency Medicine 2014 63, DOI: (10.1016/j.annemergmed.2013.09.001) Copyright © 2014 American College of Emergency Physicians Terms and Conditions

Figure 2 Ultrasonographic image of the shoulder joint from a posterior approach. The yellow arrow points to a large shoulder joint effusion that appears black. The blue dot represents the screen indicator. Annals of Emergency Medicine 2014 63, DOI: (10.1016/j.annemergmed.2013.09.001) Copyright © 2014 American College of Emergency Physicians Terms and Conditions

Figure 3 Gross pus in syringe, aspirated from the left shoulder joint, using a posterior approach with ultrasonographic guidance. Annals of Emergency Medicine 2014 63, DOI: (10.1016/j.annemergmed.2013.09.001) Copyright © 2014 American College of Emergency Physicians Terms and Conditions

Figure 4 Ultrasonographic image of the shoulder joint effusion during the ultrasonographically guided arthrocentesis. The yellow arrow points to the needle tip in the joint effusion. Annals of Emergency Medicine 2014 63, DOI: (10.1016/j.annemergmed.2013.09.001) Copyright © 2014 American College of Emergency Physicians Terms and Conditions