Acute arthritis of the hip--case series describing emergency physician performed ultrasound guided hip arthrocentesis.

: We report two cases of acute hip arthritis where arthrocentesis was able to be performed rapidly, at the bedside by the emergency physician using ultrasound guidance, expediting diagnosis and patient care. In the first case, the patient, who was 23 weeks pregnant, was diagnosed with septic hip arthritis, taken for operative washout of the joint and did very well postoperatively with no pregnancy or other complications. In the second case, the patient was determined to have a noninfectious etiology and also did well. Skilled ultrasound guidance allows hip arthrocentesis to be performed by the treating clinician, decreasing the time to diagnosis and definitive care.