CASE REPORT Approach to the Multitrauma Patient With Sternoclavicular Joint Dislocation Demis N. Lipe, MD; Darren Cuthbert, MD A 28-year-old woman presented for evaluation of bilateral clavicular and right forearm pain following a motor vehicle collision. Case The focused assessment with sonogra- A 28-year-old woman was brought to the phy for trauma examination was negative. ED by emergency medical services for eval- In addition to the bilateral clavicular and uation of injuries sustained from a high- right forearm pain, the patient also had ten- speed, rollover motor vehicle collision derness bilaterally over the sternoclavicu- (MVC), during which she was partially lar joints (SCJ) and the right midclavicle, ejected from the passenger front seat. The though there were no obvious deformities. patient did not experience any loss of con- Laboratory studies were within normal sciousness following the MVC. At presen- limits, with the exception of an elevated tation, she was oriented to place and time, white blood cell count of 21 x 109/L. and actively complained of bilateral clavic- Initial plain radiographs showed a nor- ular pain (which she noted was worse on mal chest X-ray (CXR) and right forearm her right side) as well as right forearm pain. fracture. A computed tomography (CT) The patient’s vital signs upon arrival scan further demonstrated multiple frac- were: heart rate, 94 beats/min; respira- tured ribs, a superior dislocation of the tory rate, 24 breaths/min; blood pressure, right clavicular head with respect to the 107/84 mm Hg; and temperature, 98°F. sternum (Figure), and a nondisplaced frac- Oxygen saturation was 98% on room air. ture of the right clavicle. Examination revealed a contusion over the Orthopedic services were contacted and, right breast, normal lung and heart sounds, with cardiothoracic surgery services read- and equal pulses bilaterally. The patient ily available, the patient underwent an had an open deformity of the right forearm; open reduction and internal fixation of the otherwise, her motor and sensory faculties unstable SCJ. After surgical intervention, were intact. the patient experienced motor and sensory Dr Lipe is an active duty emergency physician, department of emergency medicine, Martin Army Community Hospital, Fort Benning, Georgia. Dr Cuthbert is a second-year emergency medicine resident, department of emergency medicine, Robert Wood Johnson University Hospital, New Brunswick, New Jersey. Authors’ Disclosure Statement: The authors report no actual or potential conflict of interest in relation to this article. DOI: 10.12788/emed.2017.0047 364 EMERGENCY MEDICINE I AUGUST 2017 www.emed-journal.com dysfunction, and a magnetic resonance and posterior parts of the joint and offer imaging (MRI) study of the upper right ex- stability along with the costoclavicular tremity was ordered, which revealed bra- and interclavicular ligaments. Since the chial plexus injury secondary to hematoma surrounding ligaments provide strong sup- and soft-tissue contusion in the right su- port to the joint, an incredible amount of praclavicular region. The patient remained force is needed for a dislocation to occur. in the hospital until postoperative day 3, at The clavicle is the first long bone in the which time she was discharged home. body to ossify, and it does so in utero; how- Three weeks after discharge, the patient ever, the epiphysis of the medial clavicle is followed up with the orthopedist for fur- the last to ossify, and it does not fuse with ther surgical intervention of the commi- the body of the clavicle until the early-to- nuted distal forearm fracture. At that time, mid-third decade of life. Since younger pa- she had no further neurological or motor tients are therefore more prone to physeal deficits from the upper extremity hema- fracture than joint dislocation, it is impera- toma. However, 4 months after the MVC, tive to keep this as part of the differential she presented to the ED for evaluation of in patients younger than age 25 years.1,3,8-10 continued right shoulder pain. During this visit, X-ray studies confirmed posttrau- Primary Survey matic arthritis; otherwise, the workup was The emergency physician (EP) should negative for any further sequela or injury. approach the multitrauma patient in the usual fashion, ie, by first performing the Discussion primary survey. However, there may be Sternoclavicular joint dislocation is a rare some signs present in this early examina- traumatic injury, accounting for less than tion to indicate a posterior SCJ dislocation, 3% of shoulder girdle injuries.1-4 Disloca- including painful range of motion at the tions of the SCJ, which may be anterior or joint, inability to move the shoulder joint, posterior, superior or inferior, are typically hoarseness, dyspnea, dysphagia, neuro- due to an MVC or athletic injury involving great force.5 Although an injury involving medi- astinal compression such as a posterior SCJ dislocation can be fatal if not treated early, these dislocations are typically not detected in a multitrauma patient until the secondary survey.6 A missed diagnosis of posterior SCJ dislocation carries a mortal- ity rate of 3% to 4% due to the potential for retrosternal injuries.4,6 Unfortunately, SCJ dislocations can be an easily overlooked injury in the multitrauma patient, as plain radiographs are difficult to interpret and physical examination findings other than tenderness may not always be present.5-7 Anatomy The SCJ is comprised of the manubrium’s clavicular notch, the medial end of the clavicle, and the cartilage of the first rib.3 The capsular ligaments cover the anterior © Rihardzz/Shutterstock www.emed-journal.com AUGUST 2017 I EMERGENCY MEDICINE 365 MULTITRAUMA PATIENT WITH SCJ DISLOCATION Special Radiographic Views. If advanced imaging is not immediately available or if the patient is not in a suitable condition to leave the ED, an alternative is to obtain a serendipity view X-ray. Described in 2009 by Wirth and Rockwood,11 the serendipity view is obtained with the patient in the su- pine position and the X-ray beam tilted to a 40-degree cephalic angle centered through the manubrium. This view permits com- parison of both clavicles without overlying structures. The usefulness of serendipity view X-ray, however, is limited, as it does not allow for differentiation of sprains. Other plain radiographic views, such as the Hobbs, Heinig, and Kattan views, have also been described to evaluate for SCJ dislocation, but these views are often not feasible or easily obtained in an emergency 6,9,12 Figure. Coronal computed tomography image demonstrating the right superior setting with an acutely injured patient. sternoclavicular joint dislocation. Magnetic Resonance Imaging. Though CT is typically the advanced initial imaging vascular compromise of the arm, or frank modality of choice for assessing the pres- hemodynamic instability.6-8 After the first ence of an SCJ dislocation, additional stud- survey is completed, if the EP has a high ies using MRI are indicated for patients in level of suspicion for SCJ dislocation, it is whom there is a concern of physeal injury.1 essential to perform a thorough secondary Ultrasound. Point-of-care ultrasound has survey to confirm the diagnosis. become an important tool in the EP’s ar- mamentarium, and can easily be employed Secondary Survey to diagnose a posterior SCJ dislocation, as Anterior SCJ dislocations might be easier well as confirm the reduction. The method to detect clinically during the secondary described by Bengtzen and Petering13 in- survey, as the patient might have a defor- volves placing a linear array probe in the mity of the clavicle and swelling.8 Howev- long axis to the clavicle and scanning un- er, posterior and superior SCJ dislocations til the clavicle and sternum are identified might be more subtle during examination, by finding the hyperechoic areas. The hy- and may only exhibit tenderness and lim- poechoic area in between the clavicle and ited range of motion. sternum is the SCJ space. An ultrasound of the unaffected side can be useful for com- Imaging Studies parison purposes.6,13 Computed Tomography. Since overlying struc- tures often make it difficult to interpret sim- Management ple radiographs, advanced imaging studies Posterior SCJ dislocations are considered such as CT are often needed for diagnosis. a true emergency because of the potential A CT angiogram (CTA) may be considered structures associated with this type of in- if there is concern for vascular injury and jury. Concomitant injuries requiring im- compromise of the limb, as this modality mediate intervention include mediastinal is more accurate in evaluating vasculature compression, pneumothorax, laceration of such as the subclavian artery.4,10 the superior vena cava, tracheal erosion, 366 EMERGENCY MEDICINE I AUGUST 2017 www.emed-journal.com esophageal injury, and brachial plexus other structures such as the meniscus and compression and injury. Moreover, an un- potentially damaged fibrocartilage, which stable patient with an SCJ dislocation may if untreated can result in decreased mobil- have a lacerated thoracic vessel and need ity and pain.14,15 immediate thoracotomy.6 Anterior Reduction. Prior to any attempts at Conclusion reduction, it is imperative to consult with Although rare, posterior SCJ dislocations orthopedic and cardiothoracic surgery can be fatal when they are not diagnosed services. However, if the patient’s disloca- early. The EP must keep the possibility of tion is causing limb or life compromise, an SCJ dislocation in mind based on the then the EP should attempt closed reduc- mechanism of injury—usually direct force tion in the ED.1,3 One reduction technique is to place the patient in the supine posi- tion with a towel rolled up between his or Prior to any attempts at reduction, her shoulders. The EP then extends and abducts the affected arm using a traction- countertraction approach.