Outcomes of Paediatric Elbow Dislocations

Elbow dislocation with and without an associated fracture in children: A prospective study of functional outcomes following 3 weeks of immobilization

INTRODUCTION

The initial management of elbow dislocations in children, emergency reduction and brachial-antebrachial-palmar (BABP) immobilization, remains the most widely used method. Osteosynthesis could be associated in case of fractures. On the other hand, there is no consensus on the duration of immobilization in the recent literature. The objective of this study was to describe the medium-term functional results of a prospective cohort of children presenting with an elbow dislocation immobilized for 3 weeks, with or without an associated fracture. The hypothesis of this study was that 3 weeks of immobilization was sufficient and made it possible to obtain a satisfactory, rapid functional recovery without residual instability.

MATERIAL AND METHOD

All children with an elbow dislocation with or without an associated fracture were included. The dislocation was urgently reduced and subsequent surgery could be indicated in the event of associated injuries. All the children had 3 weeks of immobilization with a BABP cast. Radiological and clinical follow-up was carried out for 2 years. The parameters evaluated were: 3 functional scores and the range of motion (ROM) of the elbow. Clinical or radiological complications were sought.

RESULTS

A total of 50 children were included, the mean age was 10.6 years (± 2.6). Functional score results were "good' or "excellent' at 3 months of follow-up, "excellent' at 6 months and thereafter. The mean limitation in ROM at the last follow-up was 4.7° (± 7.2°) with all ranges combined. Eighty-two percent of children had a mean limitation in ROM of less than 10°. None of the children presented with a recurrence of elbow dislocation and instability.

CONCLUSION

Immobilization of elbow dislocations for 3 weeks in children confers good medium-term functional results without exposing them to the risk of instability, whether or not the dislocation is associated with a fracture.

LEVEL OF EVIDENCE

II; Prospective cohort study.

Visualization of Median Nerve Entrapment After Reduction of an Elbow Fracture Dislocation Using 3-Dimensional Magnetic Resonance Imaging: A Case Report

CASE

A 10-year-old girl presented after closed reduction of an elbow fracture dislocation. She demonstrated intact vascularity but a dense median nerve palsy. Preoperative magnetic resonance neurography (MRN) precisely mapped the median nerve entrapped within the medial epicondylar fracture. Intraoperatively, the median nerve was freed preceding reduction and fracture fixation. Postoperatively, neurological symptoms completely resolved, and she regained full elbow function.

CONCLUSION

Median nerve injury can present without associated vascular injury. In this case, MRN was helpful in preoperatively illustrating the spatial relationship between the median nerve and the medial epicondyle.

Residual elbow instability in children with posterior or postero-lateral elbow dislocation

The purpose of this study is to evaluate the incidence and the severity of residual elbow instability in children treated for posterior (PED) or postero-lateral (PLED) elbow dislocation. This retrospective study included all children younger than 14 years of age with a confirmed diagnosis of acute post-traumatic elbow dislocation (ED). Subjective data such as perceived pain, stiffness and impact of daily activities, and objective data such as skin lesions, surgical-site infections, and range of motion were recorded. All patients underwent the milking test, the chair sign test (CST) and the Drawer test (DT). The functional status has been rated according to the Mayo Elbow Performance Score (MEPS) and the Roberts criteria (RC). Radiographs of the injured arm were performed at the last follow-up visit to evaluate axial alignment, growth disturbances, osteoarthrosis, heterotopic calcifications, and the presence of loose intra-articular bodies. Nineteen patients with a mean age of 9 years and 5 months at the time of injury were available for review. Six patients had PED (31.6%) and 13 PLED (68.4%); in five cases (26.3%) the dislocation was simple and in 14 cases (73.7%) it was complex. None of the patients complained of subjective symptoms of elbow instability, although 2 patients had positive CST, and one of them also had positive milking test. RC and MEPS ranged from good to excellent in all patients. Clinical examination with multiple stability tests is important to detect residual elbow instability in children treated for ED as functional scores alone may underestimate the clinical picture.

Using the radiocoronoid line for diagnosis of elbow dislocation

The radiocapitellar line (RCL) has been widely used to diagnose elbow dislocation. However, there are limitations to the RCL, with the cartilaginous portion of bone making interpretation of radiographs difficult. The study aims to show that the radiocoronoid line, which connects two points on the medial aspect of the radius, proximal to the radial tuberosity, is more suited to diagnose elbow dislocations in the anterior-posterior projection. This study also observes factors affecting accuracy of the radiocapitellar line. The radiographs of 50 normal and 17 laterally dislocated elbows were obtained. An unbiased independent reviewer drew the radiocoronoid and radiocapitellar line (RCL). Four other blinded independent reviewers drew the RCL and the radiocoronoid line for 20 radiographs and repeated the process a week later. The accuracy of the RCL was assessed using distance away from bisection point of capitellum, and ratio (distance from the point where line crosses capitellum to lateral aspect of capitellum over the total width of capitellum). The relationship of the radio-coronoid line and the lateral aspect of coronoid fossa was assessed, with dislocation being the line lateral to it and normal being medial to or on it. The radiocoronoid line had a higher accuracy (95.5%) compared to RCL (32.8%), higher specificity (94%) compared to RCL (10%) as well as higher positive predictive value (85%) compared to RCL (27.4%). There was no intra- or inter-observer variability for the radio-coronoid line. Skeletal age statistically predicted the ratio for the male population ( P < 0.05), however, the independent variables did not statistically predict the dependent variables for the female and total population. The radiocoronoid line serves as an additional method to assess radiocapitellar joint lateral dislocation. It is more accurate and reliable than the radiocapitellar line in the anterior-posterior projection. Sex and skeletal age also influence the accuracy of the radiocapitellar line with the radiocapitellar line nearing the bisection point as skeletal age in males increases.

Long-term functional outcomes following paediatric traumatic elbow dislocation, a clinical retrospective cohort study

BACKGROUND

Paediatric traumatic elbow dislocation occurs in 6 per 100,000 children per year and if not treated promptly can result in a poor outcome. Despite this, the long-term clinical and functional outcome of these injuries has not been well described using modern patient-reported outcome tools. The aim of our study was present the outcome of these injuries in the long term.

METHODS

Twenty children with an acute traumatic elbow dislocation who presented between February 2007 to February 2016 were included in our study. Patient demographics, management and complications were recorded from the clinical notes. Ten children had associated fractures and were managed surgically, while the remaining were managed with closed reduction and immobilisation. Functional outcomes were assessed with Kim's elbow performance score.

RESULTS

The mean age was 12 years (7 -15) and follow-up was 8 years (4 - 13). There was one (5%) re-dislocation requiring surgery and one (5%) ulna nerve neurapraxia that resolved within one month. The average Kim's scores were 87.5 (65 - 100) and 77.5 (60 - 100) in the closed reduction and open reduction groups, respectively (P=0.08). 80% (16/20) reported good or excellent outcome with a Kim's score of greater than 75 points with no cases of poor functional outcome reported in our series.

CONCLUSIONS

Traumatic elbow dislocations in children, with or without associated fracture, have a good long-term functional outcome with appropriate early management.

Valgus Deformity and Posterolateral Instability after Elbow Dislocation in a Pediatric Patient- Case Report

INTRODUCTION

?Introduction: The aim of this paper is to report a rare case of a child who suffered a simple elbow dislocation (SED) that developed a post-traumatic valgus deformity and a subsequent posterolateral elbow instability.

CASE REPORT

We report a case of a female patient who suffered a posterolateral SED of her elbow at the age of 12. She was treated with closed reduction and over the years, she developed an asymptomatic valgus deformity. At the age of 16, she suffered a fall trauma while playing field hockey with a re-dislocation of the elbow. Since then, she presented multiple episodes of subluxation. A supracondylar subtractive wedge osteotomy of 20° and double plate osteosynthesis was performed with reconstruction of the ulnar lateral collateral ligament.

CONCLUSION

The focus of this article must be on the unusual occurrence of this sequence of conditions.SED is rare in children and generally associated with medial epicondyle fractures. The occurrence of a valgus deformity resulting from an injury to the periosteum can be present and must be taken into account. Posterolateral instability is rare in the context of a valgus elbow. Angular correction osteotomy and ligament reconstruction can be associated with good functional and aesthetic results.

Intraosseous Type 2 Median Nerve Entrapment After Posterior Elbow Dislocation Diagnosed on Ultrasound With MRI and Surgical Correlation

Median nerve entrapment is a rare complication of posterior elbow dislocation and medial epicondyle fracture. In the event of delayed diagnosis, this injury pattern may result in significant and sometimes irreversible nerve damage. As such, a high degree of clinical suspicion and early imaging is indicated in patients with persistent nerve deficits following reduction of elbow dislocation.

Here, a case of intraosseous type 2 median nerve entrapment that was diagnosed on ultrasound in an eight-year-old patient following ulnohumeral dislocation is discussed. This article reviews the key imaging findings of median nerve entrapment and discusses the subsequent MRI and surgical findings of this rare condition.

Magnetic resonance imaging of elbow injuries in children

Evaluating elbow injuries is challenging because of the complex anatomy of the joint. In children, injury patterns depend on the sports-specific mechanism as well as the stage of skeletal maturity. This article reviews the anatomy of the elbow and common injury patterns seen in children, with an emphasis on MRI and the throwing athlete. Imaging pitfalls specific to children are described.

A rare case of type 2 entrapment of the median nerve after posterior elbow dislocation with MRI and ultrasound correlation

A 9-year-old boy sustained an ulnohumeral dislocation with a medial epicondyle fracture and experienced incomplete post-traumatic median nerve palsy in addition to post-traumatic stiffness following closed reduction and cast immobilization. When his motor palsy and stiffness did not improve, MRI and ultrasound were obtained, which demonstrated entrapment of the median nerve in an osseous tunnel at the fracture site, compatible with type 2 median nerve entrapment. Subsequently, the patient underwent surgery to mobilize the medial epicondyle and free the median nerve, resulting in improved range of motion, near complete restoration of motor function, and complete restoration of sensory function in the median nerve distribution within 6 months of surgery. Median nerve entrapment, particularly intraosseous, is a rare complication of posterior elbow dislocation and medial epicondyle fracture that may result in significant, sometimes irreversible, nerve damage if there is a delay in diagnosis and treatment. A high degree of clinical suspicion with early imaging is indicated in patients with persistent stiffness or nerve deficits following reduction of an elbow dislocation. Intra-articular entrapment diagnosed on ultrasound has been reported and intraosseous entrapment diagnosed clinically and on MR neurography have been reported; however, to our knowledge, this is the first reported case of intraosseous (type 2) median nerve entrapment clearly visualized and diagnosed on traditional MRI and ultrasound. The use of ultrasound for diagnosing median nerve entrapment is an accurate, accessible, and non-invasive imaging option for patients presenting with suspected nerve entrapment following elbow dislocation.

Anterior transolecranon dislocation of the elbow in a child: A case report and review of literature

Anterior transolecranon dislocation of the elbow is rarely observed in children, reported in only a small series. The present case involves an anterior transolecranon dislocation of the left elbow joint in a 7-year-old child, which was surgically treated. Two attempts of closed reduction failed because the radial head had buttonholed via the joint capsule. After its release, open reduction was easily performed; osteosynthesis of the olecranon was not performed. Remarkably, good result was obtained, despite a mild flexion deformity at the last follow-up. This case report aims to highlight this treatment method, which may be considered for such an uncommon injury.

Transcapsular Buttonholing of the Proximal Ulna as a Cause for Irreducible Pediatric Anterior Elbow Dislocation

Anterior elbow dislocations in the pediatric population represent rare and sometimes difficult injuries to manage. Associated olecranon fractures are even more uncommon with limited literature existing on the topic. We present the case of a six-year-old male with a traumatic transolecranon anterior elbow fracture dislocation in whom closed reduction was prevented by buttonholing of the proximal ulna through the anterior joint capsule. This case of pediatric anterior elbow fracture dislocation provides insight into an uncommon and challenging injury complex.