This study compares intra-articular lidocaine to procedural sedation for the reduction of anterior shoulder dislocations in the emergency department.

This will be a single center, prospective, open-label, randomized controlled trial on a convenience sample of patients presenting to the ED with anterior shoulder dislocations. This study will enroll all patients between the ages of 18 and 70 who meet all of the inclusion criteria and do not meet any of the exclusion criteria, who present to the ED with an anterior shoulder dislocation as determined by the ED physician. Written, informed consent will be obtained from each patient. After enrollment, each patient will be randomized either to IV sedation (with the provider's choice of propofol or etomidate) or intra-articular lidocaine. Randomization will be done before the initiation of data collection, and will be done with a random number generator. Patients who are randomized to the intra-articular group will receive 20 mL of 1% lidocaine injected into the glenohumeral joint using a lateral approach. Treating clinicians will be instructed to wait 10 minutes after injection before attempting reduction. The primary outcome measure will be the difference in emergency department length of stay between the procedural sedation and intra-articular lidocaine groups.

Inclusion Criteria:

• Patients 18-70 years old in the emergency department with an anterior shoulder dislocation.

Exclusion Criteria:

• Pregnant or breastfeeding
• Is a prisoner.
• Known allergy to one of the study drugs.
• Altered mental status.
• Shoulder fracture (other than a Hill-Sachs) associated with the dislocation.
• Attending provider excludes patient.

If, after data collection, we feel that the release of IPD will increase the clarity of our data, we might make IPD available to other researchers.