Pediatric Distal Forearm Fractures Research Articles

Children’s orthopaedics

The April 2024 Children’s orthopaedics Roundup360 looks at: Ultrasonography or radiography for suspected paediatric distal forearm fractures?; Implant density in scoliosis: an important variable?; Gait after paediatric femoral shaft fracture treated with intramedullary nail fixation: a longitudinal prospective study; The opioid dilemma: navigating pain management for children’s bone fractures; 12- to 20-year follow-up of Dega acetabuloplasty in patients with developmental dysplasia of the hip; Physeal fractures of the distal ulna: incidence and risk factors for premature growth arrest; Analysis of growth after transphyseal anterior cruciate ligament reconstruction in children; Management of lateral condyle humeral fracture associated with elbow dislocation in children: a retrospective international multicentre cohort study.

Ultrasound Secondary Signs for the Diagnosis of Pediatric Distal Forearm Fractures: A Diagnostic Study

ObjectiveTo evaluate the diagnostic accuracy of ultrasound secondary signs of fractures in pediatric patients aged 5–15 y presenting to the emergency department with a clinically non-deformed distal forearm injury. MethodsThis diagnostic study was conducted in South East Queensland, Australia. Emergency clinicians performed point-of-care ultrasound on eligible patients and recorded secondary signs of fractures (pronator quadratus hematoma [PQH] sign, periosteal hematoma, visible angulation) or physeal fractures (fracture-to-physis distance [FPD], physis alteration). The reference standard was the final fracture diagnosis determined by expert panel. The primary outcome was the diagnostic accuracy of secondary signs for cortical breach and physeal fractures. Diagnostic statistics were reported for each relevant secondary sign. ResultsA total of 135 participants were enrolled. The expert panel diagnosed 48 “no” fracture, 52 “buckle” fracture and 35 “other” fracture. All “other” fractures were cortical breach fractures and included 15 Salter–Harris II fractures. The PQH sign demonstrated high sensitivity and moderate specificity to diagnose cortical breach fractures (91%, 95% Confidence Interval [CI] 78%–97% and 82%, 73%–88%). Poor sensitivity but high specificity was observed for the visible angulation and periosteal hematoma secondary signs. FPD <1cm showed perfect sensitivity and moderate specificity (100%, 80%–100% and 85%, 78%–90%) for diagnosis of Salter–Harris II fracture. Conversely, physis alteration showed poor sensitivity but excellent specificity (40%, 20%–64% and 99%, 95%–100%) for the diagnosis of Salter–Harris II fractures. ConclusionUltrasound secondary signs showed good diagnostic accuracy for both cortical breach fractures and Salter–Harris II fractures. Future research should consider optimal use of secondary signs to improve diagnostic accuracy.

A meta-analysis on the diagnostic utility of ultrasound in pediatric distal forearm fractures.

Pediatric distal forearm fractures, comprising 30% of musculoskeletal injuries in children, are conventionally diagnosed using radiography. Ultrasound has emerged as a safer diagnostic tool, eliminating ionizing radiation, enabling bedside examinations with real-time imaging, and proving effective in non-hospital settings. The objective of this study is to evaluate the diagnostic efficacy of ultrasound for detecting distal forearm fractures in the pediatric population. A systematic review and meta-analysis were conducted through a comprehensive literature search in PubMed, Scopus, Web of Science, and Embase databases until October 1, 2023, following established guidelines. Eligible studies, reporting diagnostic accuracy measures of ultrasound in pediatric patients with distal forearm fractures, were included. Relevant data elements were extracted, and data analysis was performed. The analysis included 14 studies with 1377 patients, revealing pooled sensitivity and specificity of 94.5 (95% CI 92.7-95.9) and 93.5 (95% CI 89.6-96.0), respectively. Considering pre-test probabilities of 25%, 50%, and 75% for pediatric distal forearm fractures, positive post-test probabilities were 83%, 44%, and 98%, while negative post-test probabilities were 2%, 6%, and 15%, respectively. The bivariate model indicated significantly higher diagnostic accuracy in the subgroup with trained ultrasound performers vs. untrained performers (p = 0.03). Furthermore, diagnostic accuracy was significantly higher in the subgroup examining radius fractures vs. ulna fractures (p < 0.001), while no significant differences were observed between 4-view and 6-view ultrasound subgroups or between radiologist ultrasound interpreters and non-radiologist interpreters. This study highlighted ultrasound's reliability in detecting pediatric distal forearm fractures, emphasizing the crucial role of expertise in precisely confirming fractures through ultrasound examinations.

Multi-Class Deep Learning Model for Detecting Pediatric Distal Forearm Fractures Based on the AO/OTA Classification.

Common pediatric distal forearm fractures necessitate precise detection. To support prompt treatment planning by clinicians, our study aimed to create a multi-class convolutional neural network (CNN) model for pediatric distal forearm fractures, guided by the AO Foundation/Orthopaedic Trauma Association (AO/ATO) classification system for pediatric fractures. The GRAZPEDWRI-DX dataset (2008-2018) of wrist X-ray images was used. We labeled images into four fracture classes (FRM, FUM, FRE, and FUE with F, fracture; R, radius; U, ulna; M, metaphysis; and E, epiphysis) based on the pediatric AO/ATO classification. We performed multi-class classification by training a YOLOv4-based CNN object detection model with 7006 images from 1809 patients (80% for training and 20% for validation). An 88-image test set from 34 patients was used to evaluate the model performance, which was then compared to the diagnosis performances of two readers-an orthopedist and a radiologist. The overall mean average precision levels on the validation set in four classes of the model were 0.97, 0.92, 0.95, and 0.94, respectively. On the test set, the model's performance included sensitivities of 0.86, 0.71, 0.88, and 0.89; specificities of 0.88, 0.94, 0.97, and 0.98; and area under the curve (AUC) values of 0.87, 0.83, 0.93, and 0.94, respectively. The best performance among the three readers belonged to the radiologist, with a mean AUC of 0.922, followed by our model (0.892) and the orthopedist (0.830). Therefore, using the AO/OTA concept, our multi-class fracture detection model excelled in identifying pediatric distal forearm fractures.

Diagnostic Accuracy of Point-of-Care Ultrasound Versus Radiographic Imaging for Pediatric Distal Forearm Fractures: A Randomized Controlled Trial

In patients aged 5 to 15 years with a clinically nondeformed distal forearm injury presenting to the emergency department (ED), we examined whether point-of-care ultrasound or radiographic imaging had better diagnostic accuracy, with the reference diagnosis determined by an expert panel review. This multicenter, open-label, diagnostic randomized controlled trial was conducted in South East Queensland, Australia. Eligible patients were randomized to receive initial imaging through point-of-care ultrasound performed by an ED clinician or radiograph. Images were defined as "no," "buckle," or "other" fracture by the treating clinician. The primary outcome was the diagnostic accuracy of the treating clinician's interpretation compared against the reference standard diagnosis, which was determined retrospectively by an expert panel consisting of an emergency physician, pediatric radiologist, and pediatric orthopedic surgeon, who reviewed all imaging and follow-up. Two-hundred and seventy participants were enrolled, with 135 randomized to each initial imaging modality. There were 132 (97.8%) and 112 (83.0%) correctly diagnosed participants by ED clinicians in the point-of-care ultrasound and radiograph groups, respectively (absolute difference [AD]=14.8%; 95% confidence interval [CI] 8.0% to 21.6%; P<.001). Point-of-care ultrasound had better accuracy for participants with "buckle" fractures (AD=18.5%; 95% CI 7.1% to 29.8%) and "other" fractures (AD=17.1%; 95% CI 2.7% to 31.6%). No clinically important fractures were missed in either group. In children and adolescents presenting to the ED with a clinically nondeformed distal forearm injury, clinician-performed (acquired and interpreted) point-of-care ultrasound more accurately identified the correct diagnosis than clinician-interpreted radiographic imaging.

Ultrasound vs X-ray to Diagnose Pediatric Distal Forearm Fractures

Ultrasound vs X-ray to Diagnose Pediatric Distal Forearm Fractures

Ultrasonography or Radiography for Suspected Pediatric Distal Forearm Fractures

BackgroundData on whether ultrasonography for the initial diagnostic imaging of forearm fractures in children and adolescents is noninferior to radiography for subsequent physical function of the arm are limited.MethodsIn this open-label, multicenter, noninferiority, randomized trial in Australia, we recruited participants 5 to 15 years of age who presented to the emergency department with an isolated distal forearm injury, without a clinically visible deformity, in whom further evaluation with imaging was indicated. Participants were randomly assigned to initially undergo point-of-care ultrasonography or radiography, and were then followed for 8 weeks. The primary outcome was physical function of the affected arm at 4 weeks as assessed with the use of the validated Pediatric Upper Extremity Short Patient-Reported Outcomes Measurement Information System (PROMIS) score (range, 8 to 40, with higher scores indicating better function); the noninferiority margin was 5 points.ResultsA total of 270 participants were enrolled, with outcomes for 262 participants (97%) available at 4 weeks (with a window of ±3 days) as prespecified. PROMIS scores at 4 weeks in the ultrasonography group were noninferior to those in the radiography group (mean, 36.4 and 36.3 points, respectively; mean difference, 0.1 point; 95% confidence interval [CI], −1.3 to 1.4). Intention-to-treat analyses (in 266 participants with primary outcome data recorded at any time) produced similar results (mean difference, 0.1 point; 95% CI, −1.3 to 1.4). No clinically important fractures were missed, and there were no between-group differences in the occurrence of adverse events.ConclusionsIn children and adolescents with a distal forearm injury, the use of ultrasonography as the initial diagnostic imaging method was noninferior to radiography with regard to the outcome of physical function of the arm at 4 weeks. (Funded by the Emergency Medicine Foundation and others; BUCKLED Australian New Zealand Clinical Trials Registry number, ACTRN12620000637943).

A comparison of two immobilization methods in the conservative treatment of pediatric distal forearm fractures: Long arm cast versus single sugar-tong splint.

The aim of this study was to compare the results of single sugar-tong splint (SSTS) and long arm cast (LAC) as an immobilization method in pediatric distal forearm fractures. Between January 2016 and December 2019, a total of 186 pediatric patients (143 males, 43 females; mean age: 10.3±3 years; range, 4 to 15 years) with distal forearm fractures were retrospectively analyzed. The patients were divided into two groups according to the immobilization method: SSTS group (n=74) and LAC group (n=112). All patients were evaluated at the time of admission, immediately after the reduction, and at one, two, and four weeks. Sagittal and coronal plane angulations and translation percentages of the radius at each visit were calculated. Alterations in coronal angle, sagittal angle, sagittal translation and coronal translation were calculated by subtracting the measurements after reduction from the measurements at four weeks. Both groups were comparable in terms of demographic characteristics, fracture localization, and side of injured extremity. There was a statistically significant difference only in the sagittal angulations in the first (LAC: 4.7; SSTS: 6.5; p=0.009) and second week (LAC: 5.3; SSTS: 6.8; p=0.024). The rest of radiological measurements were comparable. In the LAC group, seven patients had re-intervention (three manipulations, four surgeries) and in the SSTS group, three patients had re-intervention (two manipulations, one surgery) (p=0.657). Our study results suggest that SSTS and LAC are comparable in terms of radiological results and need for re-intervention as an immobilization method of pediatric distal forearm fractures.

Point-of-Care Ultrasound Fracture-Physis Distance Association with Salter-Harris II Fractures of the Distal Radius in Children: The "POCUS 1-cm Rule".

Salter-Harris II fractures of the distal radius can result in serious complications. The aim of this study was to measure the fracture-physis distance using point-of-care ultrasound (POCUS) to determine whether a certain distance is associated with Salter-Harris II fractures, compared with other fracture types, in a cohort of children with X-ray-identified distal radius fractures. Participants were from a parent diagnostic study conducted in an Australian tertiary pediatric emergency department, which prospectively evaluated the diagnosis of pediatric distal forearm fractures using POCUS compared against X-ray. Nurse practitioners, who underwent 2 h of training, administered a six-view POCUS protocol in clinically non-angulated pediatric forearm injuries prior to X-ray. This was a secondary analysis of data from the parent study. The 122 participants with X-ray-identified distal radius fractures from the parent study had their POCUS images interpreted by two emergency physician sonologists, who measured the fracture-physis distance. The median and maximum fracture-physis distances for Salter-Harris II fractures (n=19) were 8.00 and 9.85 mm, whereas minimum and median distances for incomplete fractures (n=22) were 10.20 and 15.98 mm, and those for complete fractures (n=9) were 10.85 and 12.85 mm. Buckle fracture (n=72) distances ranged from 4.35 to 26.55 mm, with a median of 13.65 mm. In children diagnosed with a distal radius fracture on X-ray, a fracture-physis distance cutoff of 1 cm differentiated Salter-Harris II fractures from other cortical breach fracture types, but not buckle fractures. Although this exploratory study suggests the "POCUS 1-cm rule" could be used as a secondary sign to augment the diagnosis of Salter-Harris II distal radius fractures using POCUS, further research is required to validate this measurement prospectively.

Functional outcome of long-arm cast versus double sugartong splint in acute paediatric distal forearm fractures: A randomised controlled trial

Background: The treatment of choice for paediatric distal forearm fractures has been a long-arm cast (LAC) following closed reduction. An alternative treatment is to use a double sugar-tong splint (DSTS), found equally effective to provide three-point fixation and comparable outcomes to cast. Objectives: To compare the functional outcome between LAC and DSTS for the treatment of paediatric distal forearm fractures. Methods: A randomised controlled trial was done among 36 patients of 5-15 years with acute distal forearm fractures without neurovascular deficit treated with LAC and DSTS recruited by convenience sampling at a tertiary care centre after ethical approval. Acceptability of reduction, loss of reduction, union rates, cast comfort, range of motion and complications were studied at follow-up upto 12 weeks and analysed using SPSS v.11.5. Results: Among a total of 36 patients, 18 cases were treated by the LAC method and others by the DSTS method. Both LAC and DSTS were comparable in the maintenance of reduction, the remanipulation rate was 8.3% (n = 3), not significant (p-value = 0.967). All had a union at six weeks follow-up. No statistical difference in mean VAS score (p-value = 0.524), mean loss of flexion (p-value = 0.397), and mean loss of pronation/supination (p-value = 0.814). No statistically significant difference in activities of daily living was noted. No complications were encountered. Conclusion: DSTS is safe and as effective as LAC in the treatment of distal forearm fractures in children, identical in terms of functional outcome, maintenance of reduction, complications, and time to union.

Children's distal forearm fractures: a population-based epidemiology study of 4,316 fractures.

AimsThe aim of this study was to report a complete overview of both incidence, fracture distribution, mode of injury, and patient baseline demographics of paediatric distal forearm fractures to identify age of risk and types of activities leading to injury.MethodsPopulation-based cohort study with manual review of radiographs and charts. The primary outcome measure was incidence of paediatric distal forearm fractures. The study was based on an average at-risk population of 116,950. A total number of 4,316 patients sustained a distal forearm fracture in the study period. Females accounted for 1,910 of the fractures (44%) and males accounted for 2,406 (56%).ResultsThe overall incidence of paediatric distal forearm fractures was 738.1/100,000 persons/year (95% confidence interval (CI) 706/100,000 to 770/100,000). Female incidences peaked with an incidence of 1,578.3/100,000 persons/year at age ten years. Male incidence peaked at age 13 years, with an incidence of 1,704.3/100,000 persons/year. The most common fracture type was a greenstick fracture to the radius (48%), and the most common modes of injury were sports and falls from ≤ 1 m. A small year-to-year variation was reported during the five-year study period, but without any trends.ConclusionResults show that paediatric distal forearm fractures are very common throughout childhood in both sexes, with almost 2% of males aged 13 years sustaining a forearm fracture each year.Cite this article: Bone Jt Open 2022;3(6):448–454.

Secondary displacement in distal forearm fractures in children: adequate positioning of the wrist in the cast is more important than cast index.

The objective of this study was to assess whether the positioning of the wrist joint in the cast in such a manner that it counteracts the direction of angulation of fragments is more important than the cast index in the prevention of secondary displacements in distal forearm fractures. A retrospective review of all pediatric patients (0-16 years of age) who were hospitalized in our institution with displaced fractures of the distal forearm (either isolated fractures of the distal radius or both bone fractures) who underwent subsequent closed reduction and splinting in the period from August 2018 to October 2020. Patients with physeal fractures and open fractures, and skeletally mature patients were excluded from the study. Patients were divided into two categories - the first one in which the cast index was below 0.9 and the second in which it was above 0.9. In each category, we have identified two groups of patients - the first one in whom the wrist joint was positioned in such a manner that it counteracts the direction of angulation of fracture fragments and the second one in whom the wrist joint was in a neutral position. The two groups in each category have been compared according to age, sex, initial angulation, fracture type (isolated radius or both bone fractures), displacement type (angulation or complete dislocation) and the rate of secondary displacement. In both categories, the two groups were comparable according to age, sex, initial angulation, fracture and displacement type. In both categories (cast index below 0.9 and cast index above 0.9), a statistically significant higher portion of patients with secondary displacement was identified in the group of patients who had the wrist joint in a neutral position ( Z = -2.1997; P = 0.0278 - for cast index <0.9 and Z = -2.1672; P = 0.030216 for cast index >0.9). Our research supports the notion that positioning of the wrist joint in the position that counteracts the force that leads to angulation of fracture fragments is more important than the cast index in the prevention of secondary displacements in pediatric distal forearm fractures.

Describing the learning curve of novices for the diagnosis of paediatric distal forearm fractures using point-of-care ultrasound.

The learning curve of nurse practitioners (NPs) to accurately diagnose paediatric distal forearm fractures using point-of-care ultrasound (POCUS) was investigated. Each NP's learning curve was calculated as cumulative diagnostic accuracy against a number of scans performed. The curve's plateau represented the attainment of competency. Secondary outcomes were the comparisons before and after this cut-off of diagnostic accuracy, classification of diagnostic errors, pain scores, duration and preference. Five NPs performed 201 POCUS studies with diagnostic accuracy plateauing at 90%, providing a 'cut-off' point at scan 15. Accuracy of POCUS scanning before and after the fifteenth scan was 81% (95% CI 70%-89%) and 90% (95% CI 84%-94%), respectively, demonstrating 9% improvement (P = 0.07). There was a 10% reduction in image interpretation errors. After fifteen scans, POCUS became faster (mean difference (MD) 2.6 min [95% CI 2.0-3.3], P < 0.001), less painful (MD 0.61 points FPSR scale [95% CI 0.04-1.18], P = 0.04) and more preferred by NPs (63% vs 77%, P = 0.03). The learning curve of POCUS-novice NPs independently scanning paediatric distal forearm injuries plateaued with mean diagnostic accuracy of 90% after 15 scans, suggesting competency was attained at this cut-off, supported by higher accuracy, being faster, less painful and more preferred by NPs. Future training packages in forearm POCUS should further address image interpretation and provide ongoing expert feedback. The findings from this study suggest that competency in paediatric distal forearm POCUS can be attained by novices after a short training course and approximately 15 scans.

The Effect of Casting Simulation on Maintenance of Fracture Alignment Following Closed Reduction of Pediatric Distal Radius Fractures: Does More Simulation Matter?

The purpose of this study was to evaluate the effectiveness of a simulation curriculum on performance of closed reduction (CR) and casting of distal radius and distal both-bone forearm fractures by orthopaedic surgery residents. The secondary aim was to identify if repeated simulation training during the clinical rotation provided additional benefit. Orthopaedic surgery residents performed simulated distal radius fracture (DRF) reduction and cast application near the beginning and end of their 6-month pediatric orthopaedic clinical rotation at a tertiary care children's hospital. A subgroup of trainees were randomly assigned additional simulation training halfway through their rotation. Clinically, 28 residents treated 159 distal radius and/or distal both-bone forearm fractures with CR and casting during the study period. Radiographic evaluations were performed comparing postreduction fracture angulation, displacement, cast index, and loss of reduction (LOR) rates at the beginning of a resident's rotation (presimulation cases) and at the end of the resident's rotation (postsimulation cases). Comparisons were also made between residents who had and did not have additional simulation training exposure during their rotation. Overall, postreduction radius angulation, maximal angulation, and cast index were lower in the postsimulation group than in the presimulation group with means 1.8°, 2.6°, and 0.75 vs 4.0°, 4.4° and 0.77, respectively. LOR rate was also lower (14% vs 30%). No significant differences were demonstrated for postreduction ulna angulation as well as for radius, ulna, or maximal displacement between these 2 groups. No significant differences were observed in radiographic parameters, cast indices, or LOR rates between residents who underwent additional mid-rotation training vs those who did not. The incorporation of a simulation training curriculum for CR and casting of pediatric distal forearm fractures resulted in statistically significant, however, marginally improved postreduction radiographic parameters and LOR rates among orthopaedic residents. The utility of repeated additional simulation training during the course of a clinical rotation remains unclear in the short term.

Point-of-Care Ultrasound Pronator Quadratus Hematoma Sign for Detection of Clinically Non-Angulated Pediatric Distal Forearm Fractures: A Prospective Cohort Study.

Point-of-care ultrasound (POCUS) diagnosis of distal forearm fractures relies on the identification of buckling or breach of hyperechoic bone cortex. We describe the pronator quadratus hematoma (PQH) formation visualized on POCUS, the PQH sign, as it may aid diagnosis of pediatric distal forearm cortical breach fractures. A prospective cohort of children presenting to an emergency department with isolated, clinically non-angulated distal forearm injuries received POCUS by an expert emergency physician sonologist who identified the presence or absence of the PQH sign. They secondarily recorded the difference between the size of the pronator quadratus (PQ) muscle on both the affected and non-affected forearms (PQ delta thickness). Children received an x-ray subsequent to POCUS and were diagnosed based on an x-ray reported by a radiologist masked to POCUS findings. Thirty-eight children were recruited. All 22 patients with cortical breach fracture had PQH sign present (100%; 95%CI: 85-100%), while all 16 patients without cortical breach fracture had PQH sign absent (100%; 95%CI: 79-100%). PQ delta thickness ranged from 2.1 to 10.2 mm in cortical breach fractures, 0.0 to 1.1 mm in buckle fractures, and 0.2 to 0.8 mm in patients without fracture. The PQH sign correctly distinguished all children with, and without, cortical breach fractures. All PQ delta thicknesses were ≧2.1 mm when cortical breach fracture was present and ≦1.1 mm when cortical breach fracture was absent. The PQH sign and PQ delta thickness are promising measurements to identify pediatric distal forearm cortical breach fractures, and their utility should be confirmed in larger studies with sonologists of different abilities.

Identifying Risk Factors for Elbow Injury in Children Presenting to the Emergency Department With Distal Forearm Fractures.

Pediatric distal forearm fractures are one of the most common injuries seen in the emergency department. Orthopedic teaching instructs providers to radiograph the joint above and the joint below the fracture site for concurrent injury. Despite this teaching, there is little evidence to suggest that elbow injuries are common in children with distal forearm fractures. Similarly, there are few data that help the clinician predict which children are at higher risk for co-injury. We conducted a cross-sectional analysis of the 2011 National Emergency Department Sample data set. Children aged 2 to 17 years with an International Classification of Disease, Ninth Revision, code for a distal forearm fracture were included in the study. The primary outcome of interest was an "elbow" injury, defined as an International Classification of Disease, Ninth Revision, code for proximal radius, proximal ulna, or distal humeral fracture or dislocation. Multivariable logistic regression was performed using patient demographics, injury severity score, mechanism of injury, and underlying medical conditions. A total of 54,262 children with a distal forearm fracture were identified. Of these children, only 0.8% (n = 463) had an elbow injury. Supracondylar fractures of the humerus were the most common elbow injury seen (48.2% of elbow injuries seen). Children were more likely to have a co-injury if they were younger (9.8 years vs 8.3 years, P < 0.01), female (36% vs 44%, P < 0.01), injured via fall (68% vs 76%, P < 0.01), had a higher injury severity score (4.1 vs 4.5, P < 0.01), or were admitted for their injuries (1.5% vs 15.7%, P < 0.01). In the adjusted model, only age and disposition were predictors of co-injury. Isolated buckle fracture of the radius and metaphyseal fracture of the radius with dorsal angulation were protective against elbow injury (odds ratio = 0.39 and 0.60, respectively). Children with distal forearm fractures very rarely have concurrent elbow injuries. These injuries are more likely in younger female children.

Plaster cast treatment for distal forearm fractures in children: which index best predicts the loss of reduction?

Several radiological indices were introduced to evaluate cast adequacy for paediatric distal forearm fractures: cast, gap, padding, Canterbury (reflecting the cast shape and the amount of padding) and three-point indices, and second metacarpal-radius angle (measuring cast ulnar-moulding). The aim of this study is to define which index is most reliable in assessing cast adequacy and predicting redisplacements. Hundred twenty-four consecutive patients (age 5-18) affected by distal both-bone forearm or radius fractures treated with casting were included. These indices and the displacement angles were calculated on the initial radiograph after reduction. Radiographs at 7 and 30 days were taken to assess if the loss of reduction occurred, and measure the displacement deltas (displacement angle at day 30 - displacement angle at day 0). Student's t-test, Chi-square test and Pearson's correlation were used for the statistical analysis. High padding (P = 0.034), Canterbury (P = 0.002) and Cast (P < 0.001) indices showed an association with redisplacements in distal forearm fractures. Both-bone forearm fractures have a higher risk of loss of reduction than radius fractures [odds ratio (OR = 4.99, 95% confidence interval (CI) = 2.21-11.3, P < 0.001]. A higher displacement delta in antero-posterior (Pearson's r = 0.418, P = 0.037) and lateral (P = 0.045) views for both-bone fractures showed an association with a high gap Index. Regarding radius fractures, a high cast index is associated with a higher displacement delta in antero-posterior (P = 0.035). The three-point index and the second metacarpal-radius angle did not show any association with the redisplacement risk. Cast oval moulding without excessive padding may prevent redisplacements in paediatric distal forearm fractures, while casts ulnar-moulding does not.

BUCKLED: Bedside ultrasound conducted in kids with distal upper limb fractures in the emergency department (observational trial)

Forearm fractures in children are a common presentation to the Emergency Department. Paediatric distal forearm fractures account for almost a third of all fractures in children, with a significant proportion of these diagnosed as buckle (torus) type fractures. These fractures are unique to children, occurring due to deformation of the metaphysis within a thick and strong periosteum. Point-of-care ultrasound has increasing utility in the diagnosis of non-angulated distal forearm fractures given that it is rapid, highly accurate, well-tolerated, and does not involve ionising radiation. Emergency Nurse Practitioners are utilised in the ambulatory care area, where they provide high-quality, cost-effective care. Given that NPs are heavily relied upon for the diagnosis and management of paediatric fractures, it was hypothesised that teaching them to diagnose distal forearm buckle fractures with a rapid POCUS protocol (i.e. less than 10 minutes) could potentially lead to time and resource savings, given that these patients can be appropriately discharged in a wrist splint. During the BUCKLED observational trial, Nurse Practitioners prospectively recruited a convenience sample of more than 200 paediatric patients over a 12-month period at a tertiary paediatric hospital in Australia. Patients were enrolled between the ages of 4-16 years with a non-deformed forearm with clinically suspected fracture to be evaluated with radiograph imaging. This pilot study determined the acceptability (staff, parent, child), tolerability (pain compared to radiograph), feasibility (time of scan), and the accuracy of Nurse Practitioners to diagnose buckle fractures using point-of-care ultrasound compared to radiograph as the gold standard. Besides potential benefits in a tertiary paediatric setting, outcomes from this study may have relevance to resource limited environments. The findings from this trial will be presented, along with future directions.

A low-cost ultrasound model for simulation of paediatric distal forearm fractures.

Forearm injuries are a common presentation to the emergency department. Point-of-care ultrasound has been demonstrated to be an accurate and well-tolerated tool in the diagnosis of non-angulated paediatric distal forearm fractures. Ultrasound model simulation is a practical alternative for ultrasound education. To describe the construction and validation of a low-cost ultrasound model for the simulation of non-angulated paediatric buckle and greenstick distal forearm fractures, for the educational instruction of healthcare providers. The materials for the basic paediatric fracture model include turkey or chicken bones soaked in white vinegar to make them pliable, food-grade gelatine and plastic containers. The fidelity can be improved by using synthetic gelatine set in a cylindrical mould, which can be placed within a manikin forearm. The models were validated by five paediatric emergency nurse practitioners and five paediatric emergency physicians. All participants were able to correctly identify the fracture types. All participants rated the models highly for both realism and educational value, with a preference for the turkey bone model as a better representation of buckle fractures. The ultrasound model described in this article can be made from low-cost materials that can be easily sourced, which facilitates the identification of the different paediatric fracture subtypes, with the additional advantage of not causing discomfort to a child. A limitation of this model includes its inability to simulate the radiolucent epiphysis and represent Salter-Harris fracture subtypes. This low-cost, high-fidelity ultrasound model presents both an accurate and practical educational model for training healthcare providers, with a preference towards the turkey bone model.

281 Incidence and Predictors of Elbow Injury in Children With Distal Forearm Fractures

Pediatric distal forearm fractures are one of the most common injuries seen in the emergency department. Providers are often advised to radiograph the joint above and the joint below the fracture site to assess for concurrent injury, even if there are no historical or physical exam findings suggestive of an additional injury at those sites. Despite this teaching, there is little evidence to suggest that elbow injuries are common in children with distal forearm fractures. Similarly, there is little data that help the clinician predict which children are at higher risk for co-injury. We performed a cross-sectional study, using the 2011 National Emergency Department Sample (NEDS) dataset. Children age 2 to 17 years with any of the 19 International Classification of Disease Ninth Revision (ICD-9) codes corresponding to forearm fractures of the distal radius and/or ulna were included in the study. The primary outcome of interest was an “elbow” injury, defined as any of the 40 ICD-9 codes for proximal radius, proximal ulna, or distal humeral fracture. Multivariable logistic regression was performed using patient demographics, Injury Severity Score, mechanism of injury, and underlying medical conditions. 54,262 children with distal forearm injuries were included, 99.3% of which were closed fractures. Of all patients with distal forearm fractures, only 0.8% (n=462) had an elbow injury. Supracondylar fractures of the humerus were the most common elbow injury seen (48.2%). Children were more likely to have a co-injury if they were younger (7.5 years vs. 9.6 years p<0.01), female (50.0% vs. 36.2%)), injured via fall (78.5% vs. 69.3% p<0.01), had a higher Injury Severity Score (4.5 vs. 4.1 p<0.01), or were admitted for their injuries (20.8 vs. 1.6% p<0.01). In the adjusted model, only age and disposition were predictors of co-injury. Isolated buckle fractures of the ulna were associated with a statistically significant increase in the odds of concurrent elbow injury (OR 5.34, 95% CI 1.69-12.93). An isolated buckle fracture of the radius and Colles-type fracture of the radius were protective against elbow injury (OR 0.32, 95% CI 0.19-0.54 and OR 0.37, 95% CI 0.21-0.62, respectively). Children with distal forearm fractures very rarely have concurrent elbow injuries. These injuries are more likely in younger patients and those admitted to the hospital.