Low complication rate of elastic stable intramedullary nailing (ESIN) of pediatric forearm fractures: A retrospective study of 202 cases

General anesthesia versus locoregional anesthesia in pediatric forearm fractures

Aim of the Study

Aim is to define whether the type of anesthesia during the reduction and fixation of a pediatric forearm fracture, can influence the fracture reduction technique.

Materials and Methods

All surgically treated forearm fractures were enrolled: patients underwent a different anesthesiology protocol depending on the on-call anesthesiologist: deep sedation in which the patient is still able to breathe with limited external support and nerve block (group A) and general anesthesia with curare (group B). Demographic data, type of fracture, surgical timing and technique, anesthesia type and timing, and clinical outcomes were recorded.

Outcomes

Of the total 326 patients considered, 228 children were treated by closed reduction (70%), and 98 children were treated by open reduction (30%). Of the latter, 75% of the fractures reduced open were of group A and 25% were of group B. In more detail, in group A, of the 162 patients, 73 (45%) required an open reduction, while 89 (55%) did not. In group B, of the 164 patients, 25 (15%) required an open reduction, while 139 (85%) did not. This resulted in being statistically significant (p = 0.001). No statistically significant results emerged from the data related to complication and range of motion apart from the pronation movement (p = 0.153).

Conclusion

According to our data, the use of curare, in a pediatric forearm fracture reduction and stabilization surgery, leads to a reduction in the number of open treatments. If deep sedation and nerve block are preferred to improve postoperative pain control, the technique and timing should be improved to facilitate reduction.

Is transphyseal intramedullary fixation of the distal radius in pediatric fractures a safe procedure? An MRI study

Background

Radius and ulna fractures are very common in the pediatric population. Despite the use of pinning through the growth plate, which was proposed in the past and is still being used to treat these fractures, an instrumental validation to define this procedure as safe has not yet been done. Because of this, in the absence of reliable data regarding the passage of fixation devices through the growth plate, most surgical techniques used for treating radius and ulna fractures are based on absolute respect for the growth cartilage. We conducted an MRI pilot study to evaluate the presence of any growth disturbances, bone bridge formation across the physis, or premature closure of the cartilage, to verify the correlation between wire diameter and the percentage of lesions tolerated by the growth plate and to confirm the safety of the trans-physeal pinning procedure. To specifically avoid the wrist fracture healing process near the growth plate as possible bias of the study, we enrolled only patients with mid-shaft forearm fractures.

Materials and methods

We evaluated 26 patients with diaphyseal forearm fractures who underwent intramedullary percutaneous transphyseal fixation of the distal radius with a Kirschner wire. Intramedullary K-wire and plaster cast were removed, without a second surgery or anesthesia, about 35-40 days after surgery. A clinical and radiographic evaluation was performed at 1, 3, 6 and 12 months from surgery. We conducted a comparative MRI evaluation of both wrists 12 months after the removal of the K-wire to exclude any growth plate damage related to the passage of the wire through it.

Results

clinical data underlined excellent results in most patients. Radiographic healing was achieved in all cases at three months. No significative cartilage disturbances related to the procedure were found in any patient. An asymmetrical bridge that did not correspond to the wire position was found in some older patients, probably related to the initial phase of the growth plate closure process.

Conclusion

This study demonstrates that the percutaneous trans-physeal technique could become a valid alternative to the standard method, offering a rapid learning curve, shorter surgical times, and reduced healthcare costs.

Introducing the forearm fracture index to define the diametaphyseal junction zone through clinical evaluation in a cohort of 366 diametaphyseal radius fractures

BACKGROUND

Unstable diametaphyseal radius fractures (DMRFs) can be prone to complications, and treatment strategies are heterogeneous. Studies are difficult to interpret as definitions of the diametaphyseal junction zone (DMJZ) are impractical for clinical use, imprecise, or prone to error.

METHODS

We introduce the forearm fracture index (FFI) to define DMRFs in radiographs and ultrasound. The FFI is calculated by the ratio of the fracture's distance to the distal radius growth plate over the width of the radius growth plate. The higher the FFI, the more proximal the fracture is. We define DMRFs to have an FFI between 1 and 2. All DMRFs treated at our institution between 2010 and 2020 were identified, and demographic data, fracture characteristics, and therapeutic strategies were assessed retrospectively. Comparative sub-analysis was performed between DMRFs(-) as defined in previous publications (Lieber in Unfallchirurg 114:292-299, 2011) and DMRFs( +) that were more proximal but still met our criteria.

RESULTS

516 DMRFs were identified, representing 13.0% of all screened radius fractures. Excluding buckle fractures and patients lost to follow-up, 366 DMRFs were eligible for further analysis. Conservatively managed DMRFs were more distal than those managed operatively, represented by a lower FFI (1.28 vs. 1.34, p = 0.0051). 21 (5.7%) of all DMRFs were identified as DMRFs( +). These were significantly more dislocated and necessitated surgery more often than DMRFs(-) (52.4 vs. 24.6%, p = 0.009).

CONCLUSIONS

The FFI may be a good tool to identify and describe DMRFs. It can help guiding treatment decisions and make future studies on this entity more comparable.

LEVEL OF EVIDENCE

Study of Diagnostic Test, Level II.

Elastic stable intramedullary nailing in paediatric diaphyseal forearm fractures - a retrospective analysis of 201 cases

BACKGROUND

Forearm shaft fractures are common injuries, often caused by falling from a fully-upright position or falling off a bike. They can be treated nonoperatively or surgically with intramedullary nailing or plates. The method of choice for treating pediatric forearm shaft fractures is the application of elastic stable intramedullary nailing (ESIN)|. The aim of the study was to evaluate ESIN in pediatric patients with forearm shaft fractures based on radiological images, and determine the etiology and complication rate associated with the injury.

METHODS

The study included 201 patients, 30.5% female 69.5% male, aged 1 to 17 years (mean 9.1 years; SD = 3.2), all had been diagnosed with a fracture of the forearm shaft and had been treated surgically with ESIN. In addition, all possessed a complete set of X-ray images and had attended a minimum six-month follow-up examination of the forearm. Axial alignment was evaluated retrospectively in the anatomical (AP) and lateral (LAT) positions. In total, 402 radiographs were examined. Of the injuries, 68% occurred during sports activity and 75% involved both the radius and the ulna.

RESULTS

Union was observed in all cases. Mean axial alignment values in AP and LAT X-ray or both the ulna and radius were satisfactory. Axial alignment values were not influenced significantly by age, type of surgery, type of fracture or etiology. Plaster cast application (9.8% of cases) significantly influenced radius axial alignment. The complication rate was 11.4% (n = 23). Significantly more complications were observed in patients receiving open reduction internal fixation (ORIF) (p = 0.0025).

CONCLUSION

The ESIN technique is an effective treatment for forearm diaphyseal fractures in children, with good results regarding reduction and bone healing, indicated by x-ray.

Comparison of Titanium versus Resorbable Intramedullary Nailing in Pediatric Forearm Fractures

Pediatric forearm fractures, particularly involving the shaft or diaphysis, are common injuries typically resulting from accidental trauma during various activities. Traditional treatment involves closed reduction and casting; however, surgical intervention may be necessary in certain cases. The gold standard surgical approach utilizes elastic stable intramedullary nailing (ESIN), but a newer technique uses bioabsorbable intramedullary nails made of poly(lactic-co-glycolic acid) (PLGA). This study aims to compare the outcomes of these two surgical methods in pediatric diaphyseal forearm fractures. We retrospectively reviewed 86 patients who underwent operative treatment due to the diaphyseal fractures of the forearm in the Surgical Division, Department of Pediatrics, Medical School, University of Pécs, Pécs, Hungary between 2018 and September 2022. The mean age was 9.48 (ranging from 4 to 17). A total of 41 patients underwent surgery with PLGA implants (RESIN technique), while 45 patients were treated with titanium elastic nails (ESIN technique). Various factors including patient demographics, injury mechanisms, fracture characteristics, and complications were assessed. Both groups showed similar gender distribution, with a majority of fractures occurring in boys (the male-female ratio was 31:10 in the PLGA group, while in the titanium elastic nailing (TEN) group, this ratio was 29:16, with no statistical difference between the groups (p > 0.005). The average age of the patients treated with PLGA implants (8.439 years) was lower compared to those treated with titanium nails (10.422 years). A statistically significant difference was found regarding the average age of the two groups (p = 0.0085). Left-sided injuries were more prevalent in both groups (59% of the cases in the PLGA group and 69% in the TEN group, with no statistically significant difference, p = 0.716), and fractures typically involved both the radius and ulna. This represents 93% of the cases in the PLGA group and 80% in the TEN group. Regarding the involvement of bones, we also did not find a statistically significant difference (p = 0.123). The mechanisms of injury predominantly involved indirect force, such as falls (30 cases in the PLGA group and 27 cases in the TEN group), and no statistically significant difference was found (p = 0.139) regarding the mechanism of the injury. Complication rates were lower in the PLGA group (7%) compared to the titanium group (20%). The treatment of pediatric diaphyseal forearm fractures using PLGA implants appears to be a viable alternative to traditional titanium implants. Advantages include no need for secondary surgery and associated cost savings and reduced complication rate and stress associated with anesthesia and surgery. Prospective randomized trials are warranted to further validate these findings and explore long-term outcomes.

Pediatric Forearm Fractures: Investigating the Functional Outcomes of Titanium Elastic Nailing for Unstable Both-Bone Fractures

Introduction

Diaphyseal forearm fractures pose a common challenge in children and adolescents, impacting forearm function due to rotational deformities and angulation. The landscape of pediatric forearm fracture treatment has seen limited progression, with increased surgical intervention adoption driven by factors such as functional implications, technological advancements, societal expectations, and legal concerns.

Materials and Methods

This study enrolled consecutive children aged 5-16 years with forearm fractures presenting between August 2018 and January 2020, requiring surgical intervention. The study assessed functional outcomes and complications in children treated with titanium elastic nailing.

Results

Sixteen patients underwent surgery for both-bone forearm fractures. Elastic nailing was the primary intervention, with 75% undergoing closed nailing. Patients' ages ranged from 5 to 15 years, with 87.5% being male. The study evaluated fracture characteristics, surgical procedures, post-operative care, and complications.

Conclusion

The study demonstrates promising outcomes for flexible intramedullary nailing in pediatric forearm fractures. Despite the observed complications, the majority of cases achieved excellent results in fracture union and patient recovery, supporting the efficacy of this technique. Larger cohorts are needed for a comprehensive understanding of its applicability and outcomes in pediatric forearm fracture management.

Technical aspects that may affect the outcomes of pediatric patients with both-bone forearm diaphyseal fractures treated using elastic stable intramedullary nails

We assessed the radiological and functional results of pediatric both-bone forearm diaphyseal fractures treated using elastic stable intramedullary nails (ESINs), as well as factors affecting the results. In total, 36 patients (33 males and three females; mean age, 11.6 years) were included. The mean follow-up time was 41.5 (18-96) months. Patient demographic characteristics and the details of the surgical techniques were analyzed retrospectively. In addition to standard radiographic evaluations, the ratio between the nail diameter and medullary canal diameter (ND/MCD) was measured, as well as the maximal radial bowing. According to the criteria of Price and Flynn, 28 (77.8%) and eight (22.2%) patients had excellent and good results, respectively. There were no cases of nonunion or delayed union. There was no significant difference in functional or radiological results according to whether titanium nails (24 patients) or stainless steel nails (12 patients) were used (all P  > 0.05). Nail prebending (performed in 19 patients) did not affect the functional or radiological results ( P  > 0.05). Loss of reduction was observed in four patients with an ND/MCD ratio <40%. The maximal radial bowing improved in all patients. The mean change was significantly greater in patients with diastases and 22D/4.1 fractures. Regardless of nail type or prebending status, surgery using ESIN placement effectively treats both-bone forearm diaphyseal fractures; radial bow remodeling outcomes are excellent. We recommend that the ND/MCD ratio should be 40-70%.

The Risk of Nerve Injury in Pediatric Forearm Fractures

UPDATE

This article was updated on July 19, 2023, because of a previous error, which was discovered after the preliminary version of the article was posted online. On page 1080, in the last sentence of the Results section of the Abstract, the text that had read "0.05% (4 of 777)" now reads "0.5% (4 of 777)."

BACKGROUND

The risk of fracture-related nerve injury associated with forearm fractures in children is unknown. The purposes of the present study were to calculate the risk of fracture-related nerve injury and to report the institutional rate of complications of surgical treatment of pediatric forearm fractures.

METHODS

Four thousand, eight hundred and sixty-eight forearm fractures (ICD-10 codes S52.0 to S52.7) that had been treated in our tertiary level pediatric hospital between 2014 and 2021 were identified in our institutional fracture registry. Of these, 3,029 fractures occurred in boys and 53 were open fractures. Sex, age at injury, trauma mechanism and energy, fracture type, treatment method, and cause and type of nerve injury were assessed in 43 patients with 44 registered nerve injuries. Patients with nerve injuries were reevaluated to calculate the recovery time. Univariable and multivariable regression analyses were performed to determine the risk of nerve injury.

RESULTS

The risk of a fracture-related nerve injury was 0.7% (33 of 4,868). Only 2 injuries were permanent; thus, the risk of permanent nerve injury associated with a forearm fracture was 0.04% (2 of 4,868). The ulnar nerve was affected in 19 cases; the median nerve, in 8; and the radial nerve, in 7. In cases of open fracture, the risk of nerve injury was 17% (9 of 53). Open fractures had an OR of 33.73 (95% CI, 14.97 to 70.68) on univariate analysis and an OR of 10.73 (95% CI 4.50 to 24.22) on multivariate analysis with adjustment for female sex and both-bone diaphyseal fracture. Both-bone diaphyseal fracture (ICD-10 code S52.4) had an OR of 9.01 (95% CI, 4.86 to 17.37) on univariate analysis and an OR of 9.98 (95% CI 5.32 to 19.47) on multivariate analysis with adjustment for age and female sex. Overall, 777 fractures were internally fixed. The risk of nerve injury as a complication of internal fixation was 1.3% (10 of 777). Four of these iatrogenic injuries (including 2 involving the median nerve, 1 involving the ulnar nerve, and 1 involving the radial nerve) were permanent; thus, the risk of permanent nerve injury as a complication of internal fixation was 0.5% (4 of 777).

CONCLUSIONS

Nerve injury following a pediatric forearm fracture is rare and has an excellent potential for spontaneous recovery. In the present study, all of the permanent nerve injuries occurred in association with open fractures or as a complication of internal fixation.

LEVEL OF EVIDENCE

Prognostic Level III . See Instructions for Authors for a complete description of levels of evidence.

Subsequent Forearm Fractures Following Initial Surgical Fixation

INTRODUCTION

Forearm fractures are a common pediatric injury. Currently, there is no consensus on treatment for fractures that recur following initial surgical fixation. The objective of this study was to investigate the subsequent fracture rate and patterns and describe the treatment of these forearm fractures.

METHODS

We retrospectively identified patients who underwent surgical treatment for an initial forearm fracture at our institution between 2011 and 2019. Patients were included if they sustained a diaphyseal or metadiaphyseal forearm fracture that was initially treated surgically with a plate and screw construct (plate) or elastic stable intramedullary nail (ESIN), and if they subsequently sustained another fracture that was treated at our institution.

RESULTS

A total of 349 forearm fractures were treated surgically with ESIN or a plate fixation. Of these, 24 sustained another fracture, yielding a subsequent fracture rate of 10.9% for the plate cohort and 5.1% for the ESIN cohort ( P =0.056). The majority of plate refractures (90%) occurred at the proximal or distal plate edge, while 79% of the fractures treated previously with ESINs occurred at the initial fracture site ( P <0.001). Ninety percent of plate refractures required revision surgery, with 50% underwent plate removal and conversion to ESIN, and 40% underwent revision plating. Within the ESIN cohort, 64% were treated nonsurgically, 21% underwent revision ESINs, and 14% underwent revision plating. Tourniquet time for revision surgeries were shorter for the ESIN cohort (46 vs. 92 min; P =0.012). In both cohorts, all revision surgeries had no complications and healed with evidence of radiographic union. However, 9 patients (37.5%) underwent implant removal (3 plates and 6 ESINs) after subsequent fracture healing.

CONCLUSIONS

This is the first study to characterize subsequent forearm fractures following both ESIN and plate fixation and to describe and compare treatment options. Consistent with the literature, refractures following surgical fixation of pediatric forearm fractures may occur at a rate ranging from 5% to 11%. ESINs are both less invasive at the time of initial surgery and can often be treated nonoperatively if there is a subsequent fracture, while plate refractures are more likely to be treated with a second surgery and have a longer average surgery time.

LEVEL OF EVIDENCE

Level IV-retrospective case series.

Long-term in vivo degradation of Mg-Zn-Ca elastic stable intramedullary nails and their influence on the physis of juvenile sheep

The use of bioresorbable magnesium (Mg)-based elastic stable intramedullary nails (ESIN) is highly promising for the treatment of pediatric long-bone fractures. Being fully resorbable, a removal surgery is not required, preventing repeated physical and psychological stress for the child. Further, the osteoconductive properties of the material support fracture healing. Nowadays, ESIN are exclusively implanted in a non-transphyseal manner to prevent growth discrepancies, although transphyseal implantation would often be required to guarantee optimized fracture stabilization. Here, we investigated the influence of trans-epiphyseally implanted Mg-Zinc (Zn)-Calcium (Ca) ESIN on the proximal tibial physis of juvenile sheep over a period of three years, until skeletal maturity was reached. We used the two alloying systems ZX10 (Mg-1Zn-0.3Ca, in wt%) and ZX00 (Mg-0.3Zn-0.4Ca, in wt%) for this study. To elaborate potential growth disturbances such as leg-length differences and axis deviations we used a combination of in vivo clinical computed tomography (cCT) and ex vivo micro CT (μCT), and also performed histology studies on the extracted bones to obtain information on the related tissue. Because there is a lack of long-term data regarding the degradation performance of magnesium-based implants, we used cCT and μCT data to evaluate the implant volume, gas volume and degradation rate of both alloying systems over a period of 148 weeks. We show that transepiphyseal implantation of Mg-Zn-Ca ESIN has no negative influence on the longitudinal bone growth in juvenile sheep, and that there is no axis deviation observed in all cases. We also illustrate that 95 % of the ESIN degraded over nearly three years, converging the time point of full resorption. We thus conclude that both, ZX10 and ZX00, constitute promising implant materials for the ESIN technique.

Child Fractures: Are We Getting More Surgical?

Historically, surgeries on the immature skeleton were reserved for open or articular fractures. In recent years, the improvement in the quality and safety of anesthesia, new imaging equipment, implants designed especially for pediatric fractures, associated with the possibility of shorter hospitalization time and rapid return to social life has demonstrated a new tendency to evaluate and treat fractures in children. The purpose of this update article is to answer the following questions: (1) Are we really turning more surgical in addressing fractures in children? (2) If this is true, is this surgical conduct based on scientific evidence? In fact, in recent decades, the medical literature demonstrates articles that support better evolution of fractures in children with surgical treatment. In the upper limbs, this is very evident in the systematization of the reduction and percutaneous fixation of supracondylar fractures of the humerus and fractures of the forearm bones. In the lower limbs, the same occurs with diaphyseal fractures of the femur and tibia. However, there are gaps in the literature. The available published studies show low scientific evidence. Thus, it can be inferred that, even though the surgical approach is more present, the treatment of pediatric fractures should always be individualized and conducted according to the knowledge and experience of the professional physician, taking into account the presence of technological resources available for the care of the small patient. All possibilities, non-surgical and/or surgical, should be included, always instituting actions based on science and in agreement with the family's wishes.

Girl predominance in trampoline-related forearm shaft fractures and their increasing incidence since 2000

BACKGROUND

There are reports of increasing incidence of forearm shaft fractures in children. Their treatment has been preferably nonoperative but surgical fixation has gained popularity due to elastic stable intramedullary nailing. We aimed to study whether the incidence of pediatric both-bone forearm shaft fractures and their operative care have changed since year 2000. Trampoline injuries, in particular, and their treatment, re-displacement and short-term outcomes were the secondary outcomes of the study.

METHODS

A population-based study in the geographic catchment area of Oulu University Hospital district in 20-years of time period (2000 - 2019) was performed. Altogether 481 diaphyseal both-bone forearm fractures in children (< 16 years) were included. Age- and sex-related incidence rates were determined, by using the official numbers of the population-in-risk by Statistics Finland. Trampoline jumping and other types of injury were reviewed, as well as particulars of treatment and outcomes.

RESULTS

The incidence of diaphyseal both-bone forearm fractures increased from 9.4/100 000 in 2000-2001 to 41.7/100 000 in 2018-2019 (P < 0.001). Surgical treatment increased respectively (from 8.8/100 000 in 2000-2001 to 35.3/100 000 in 2018-2019, P < 0.0001). Trampoline injuries explained one in three (29%) of all fractures; they increased from 0% in 2000-2001 to 36.6% in 2018-2019 (P < 0.001). During the last four years of the study (2016-2019), most trampoline-related injuries occurred among girls (61.2%), compared to boys (38.8%) (P = 0.031). Trampoline-related injuries comprised 46.9% of all fractures in girls, compared to 26.0% among boys (Diff. 20.8%, 4.7% to 36.1%, P = 0.009). The mean age of the patients elevated from 6.4 years (2000-2001) to 8.6 years (2018-2019) (P = 0.015). Boys predominated (69.6%) in 2000-2009 but during the last ten years, there was no statistical difference in distribution between the genders (males 54.6%, P = 0.11).

CONCLUSIONS

During the twenty-year's of study period, the incidence of pediatric diaphyseal forearm fractures increased fivefold. Trampolining was the most usual single reason for the fractures. More attention should be focused to increase the safety of trampoline jumping, in particular among the girls.

Diametaphyseal Distal Forearm Fractures in Children: A STROBE Compliant Comparison of Outcomes of Different Stabilization Techniques Regarding Complications

Diametaphyseal forearm fractures are difficult to treat because standard methods for long-bone fracture stabilization in the metaphyseal or diaphyseal regions are less effective in this transition zone. We hypothesized that there is no difference in outcomes between conservative and surgical treatment of diametaphyseal forearm fractures. This retrospective analysis included 132 patients who had undergone treatment for diametaphyseal forearm fracture between 2013 and 2020 at our institution. The primary analysis compared complications occurring in patients treated conservatively with those occurring in patients managed surgically (ESIN, K-wire fixation, KESIN stabilization, or open reduction and plate osteosynthesis). In a subgroup analysis, we compared the two most frequently applied surgical stabilization techniques in distal forearm fractures (i.e., ESIN and K-wire) with conservative treatment. The mean age of the patients at the time of intervention was 9.43 ± 3.78 years (mean ± SD). Most patients were male (91; 68.9%), and 70 of 132 (53.1%) patients underwent surgical stabilization. The rate of re-intervention or complications was similar after conservative and surgical treatment, and ESIN or K-wire fixation achieved comparable complication rates. Recurrent displacement of fragments was the most frequent reason for re-interventions (13 of 15 patients; 86.6%). There was no permanent damage as a result of a complication. The median time of exposure to image intensifier radiation was comparable between ESIN (95.5 s) and K-wire fixation (85.0 s), but significantly lower during conservative treatment (15.0 s; p = 0.001).

[Long-Term Results of Extensor Indicis Transposition Following Rupture of the Extensor Pollicis Longus Tendon after Paediatric Forearm Fracture]

BACKGROUND

A rare but typical perioperative complication in the surgical treatment of pediatric forearm fractures is injury to the extensor pollicis longus (EPL) tendon. This article presents the long-term results after reconstruction of the EPL tendon with transposition of the extensor indicis (EI) tendon in children and adolescents after surgically treated forearm fracture.

PATIENTS AND METHODS

Over a period of 15 years, 22 children up to the age of 16 were treated with EI transposition analogous to adult care. In a follow-up examination, the range of motion of the finger and thumb joints, retropulsion of the thumb and index finger, abduction and opposition were examined. In addition, hand span and strength in the gross, key, and point grasp were measured. Subjective complaints were questioned and the DASH score was assessed.

RESULTS

Rupture of the EPL tendon is a rare complication, accounting for 1% of all surgically treated paediatric forearm fractures. 15 patients with an average age of 10.9 years could be followed up for an average of 66.5 months after transposition of the EI tendon. Significant differences were found in reduced mobility of the metacarpophalangeal joint of the thumb, isolated extensor strength of the index finger, a reduced span between the thumb and index finger in palmar abduction, and reduced strength in the pointed grip. Subjectively, the differences between the sides were not noticed by the patients and their parents in everyday life.

CONCLUSIONS

Transposition of the EI tendon for reconstruction of a ruptured EPL tendon as a rare complication after paediatric forearm fracture does lead to a measurable and significant reduction in index finger mobility on the affected side in the long term, but without subjective limitations of the children.

Dynamic palmar dislocation of the ulnar head at the distal radioulnar joint (DRUJ) after radius shaft malunion

INTRODUCTION

Palmar instability of the distal radioulnar joint (DRUJ) is a rare condition, which is, in contrast to the dorsal dislocation, scarcely represented in the literature. This palmar instability can result from a dorsally angulated malunion of the radial shaft after forearm fracture in childhood. Treating such a condition is controversial in the literature and was described in small case series. This study represents the largest case series in the literature that dealt with this condition, alongside a review of the key papers in the English literature.

MATERIALS AND METHODS

This is a retrospective case series. Ten patients were operated between 2007 and 2014. Six patients could be followed up clinically and radiologically after radius corrective osteotomy at the site of malunion with a mean time of 5.6 years. Patient history revealed a conservatively treated forearm fracture in childhood, a symptom-free period of several years [mean of 21.5 (min-max: 9.4-26.5) years] and a minor trauma as a trigger for clinical symptoms. All patients had clinically a DRUJ instability with palmar luxation of the ulnar head at supination. A diagnostic key feature is a radiograph of the whole forearm, revealing malunion of the radius at shaft level. Retrospective patient history, diagnostic imaging, operative technique and clinical results (DASH, modified Mayo Wrist Score, pain, grip strength, range of motion) were analyzed.

RESULTS

Four patients were lost to follow-up. In all patients, a radius corrective osteotomy could stabilize the DRUJ. In one patient, the osteosynthesis was revised due to metal failure after one month. In all the six patients, bony union of the osteotomy was achieved. In another patient, an additional ulnar shortening osteotomy was done one year later due to a positive ulnar variance. Postoperative range of motion of the wrist had an average of 136° in extension/flexion and 149° in pronation/supination, and grip strength was 89% of the opposite side. With an average of 12.5 points at the DASH score and 82 at the modified Mayo Wrist Score, patients rated their hand function as good.

CONCLUSIONS

In this patient cohort, a simple corrective osteotomy of the radial shaft at the malunion site was adequate to treat the dynamic palmar instability of DRUG. A soft tissue procedure was not required. Forearm radiographs are the mainstay of diagnostic tools.

Retrograde intramedullary nailing of the radius in children: A pilot magnetic resonance imaging study of soft-tissue findings

PURPOSE

Unstable forearm shaft fractures in children are preferably treated surgically using elastic stable intramedullary nails. The radius is nailed retrograde from the distal metaphysis. There is a risk of surgery-related soft-tissue complications during the operation. Close evaluation of occult surgery-related soft-tissue lesions has not been possible previously, due to the titanium alloy hardware used in the process. The aim of the present study was to evaluate the potential findings in the surrounding soft tissues after intramedullary nailing of the radius, by using magnetic resonance imaging.

METHODS

The study population comprised 15 pediatric patients with forearm shaft fractures treated by polylactide-co-glycolide biodegradable intramedullary nails and postoperatively evaluated via magnetic resonance imaging. The main outcome was signal abnormality in any tendon at the entry point postoperatively. Secondarily, other changes in the soft tissues related to nailing were determined. Furthermore, the precise location of the entry point and the anatomic characteristics of the soft-tissue tunnel were described.

RESULTS

In total, 5 of 15 patients (33.3%) had transient signal pathology in a tendon postoperatively. Edema around the superficial radial nerve was detected in 13 of 15 patients (86.7%). The most common surgical approach was between the extensor pollicis brevis and the extensor carpi radialis longus tendons, which was applied in 10 of 15 patients (66.7%).

CONCLUSIONS

One in three patients exhibited transient and occult surgery-related intraparenchymal signal pathology in a tendon, after forearm intramedullary nailing. Caution with surgical prepare of the soft-tissue cleavage is recommended.

LEVEL OF EVIDENCE

IV.

Radial vs. Dorsal Approach for Elastic Stable Internal Nailing in Pediatric Radius Fractures—A 10 Year Review

Background: Forearm fractures are one of the most common fractures in children. Over the last years, a tendency towards surgical treatment was seen, especially closed reduction and internal fixation with elastic stable internal nailing (ESIN). Despite an overall low complication rate being described, a risk of intraoperative complications remains. Material and Methods: A total of 237 patients (mean age 8.3 ± 3.4 (1–16) years) with forearm or radius fractures treated with ESIN between 2010 and 2020 were included in the study. The retrospective review of 245 focused on fracture pattern, pre- and postoperative fracture angulation, intra- and postoperative complications, and surgical approach for nail implant. The fracture pattern and pre- and postoperative angulation were measured radiographically. Complications such as ruptures of the extensor pollicis longus (EPL) tendon and sensibility disorders of the superficial radial nerve were further analyzed. Results: In 201 cases (82%), we performed a dorsal approach; 44 fractures (17.9%) were treated with a radial approach. In total, we found 25 (10%) surgery-related complications, of which 21 (8.6%) needed further surgical treatment. In total, we had 14 EPL ruptures (5.7%), 4 sensibility disorders of the superficial radial nerve (1.6%), 2 refractures after implant removal (0.8%), 2 superficial wound infections (0.8%), and 1 child with limited range of motion after surgery (0.4%). No statistical significance between pre- and postoperative angulation correlated to fracture patterns or diameter of the elastic nail was seen. As expected, there was a significant improvement of postoperative angulation. Using radial approach in distal radial fractures showed a lower rate of surgical related complications, 2.3% of which need further surgical treatment as well as better postoperative angulations compared to the dorsal approach (8.5%). Conclusion: Especially due to the low risk of damaging the EPL tendon, the radial approach showed a lower complication rate which needed further surgical treatment. The risk of lesions of the superficial radial nerve remains.

Pilot Study and Preliminary Results of Biodegradable Intramedullary Nailing of Forearm Fractures in Children

(1) Background: Diaphyseal forearm fractures are a common injury in children and adolescents. When operative treatment is needed, elastic stable intramedullary nailing (ESIN) is the most common surgical procedure. Although there is no clear evidence, hardware removal after fracture healing is performed in many patients. Often, the primary minimal invasive incision needs to be widened during implant removal. In order to decrease the burden of care of pediatric fractures, significant efforts were made to develop biodegradable implants, which make hardware removal unnecessary. Our study will conduct an observational trial on the clinical use of the Activa IM-Nail™ in forearm fractures in children between 3 and 13 years of age. The objective of this trial is to evaluate the risks and benefits of the Activa IM-Nail™. Among other objectives, the rate of refracture will be determined. (2) Methods: An international Europe-based, multicenter, prospective, single-arm, open-label study will be performed to ascertain the rate of refracture and to determine the subjective benefits of Activa IM-Nail™ for patients, parents and other caregivers. The study will include clinical follow-up including early post-operative complication, radiographs until bony healing and an additional follow-up after 1 year. At this stage, preliminary results and early complications on 76 patients are analyzed in this study and presented. (3) Results: As of April 2022, 76 patients were enrolled as per study protocol. There were 31 girls (40.8%) and 45 boys (59.2%). The mean age at the time of inclusion was 8.9 years (±2.4 years). The mean operation time was 58.9 ± 22.9 min (range, 15–119 min). The mean follow-up time was 8.9 ± 5.1 months (range, 0.2–18.6). Up to now, one refracture has occurred in one child falling from a height of about one meter 7 months after index surgery (1/76; 1.3%). (4) Conclusion: The research project assesses the safety and effectiveness of Activa IM-Nails™ as part of the surgical treatment of dislocated forearm fractures in children in the context of a PMCF study. The use of Activa IM-Nails™ with regard to various objectives, including postoperative complications and refracture rate, seems to be equal to the standard titan ESIN procedure compared to the literature. Preliminary results are encouraging and are made available.

Post-traumatic Radioulnar Synostosis in Distal Forearm Fractures in Children: A Report of 2 Cases

CASES

Two pediatric cases of post-traumatic distal radioulnar synostosis are reported, accompanied by a literature review summarizing evidence on the management of these conditions. Radioulnar synostosis is a rare complication of distal forearm fractures, which impairs upper-extremity function. The numerous surgical procedures that have been described to treat this condition in adults typically involve synostosis resection and an interposition graft to reduce recurrence. The optimal treatment in children has not been established.

CONCLUSIONS

Post-traumatic radioulnar synostoses are rare conditions in pediatric patients who can be successfully treated with surgical excision of the synostoses and without the use of interposition grafting.

Management of acute length-unstable Monteggia fractures in children: A case report

BACKGROUND

Monteggia fractures are uncommon injuries in paediatric age. Treatment algorithms assert that length-unstable fractures are treated with plate fixation. In this case report, intramedullary fixation of an acute length-unstable Monteggia fracture allowed a stable reduction to be achieved, along with an appropriate ulnar length and alignment as well as radio capitellar reduction despite the fact that the orthopaedic surgeon did not use a plate for the ulnar fracture. The scope of treatment is to avoid the use of a plate that causes periosteal stripping and blood circulation disruption around the fracture.

CASE SUMMARY

A four-year-old girl presented at the Emergency Department following an accidental fall off a chair onto the right forearm. The X-ray highlighted a length-unstable acute Bado type 1 Monteggia fracture of the right forearm. On the same day, the patient underwent surgical treatment of the Monteggia fracture. The surgeon preferred not to use a plate to avoid a delay in fracture healing and to allow the micromotion necessary for callus formation. The operation comprised percutaneous fixation with an elastic intramedullary K-wire of the ulnar fracture and, subsequently, humeroradial joint reduction through manual manipulation. The orthopaedic surgeon assessed the stability of the radial head reduction under fluoroscopic control through flexion, extension, pronation and supination of the forearm. Healing of the fracture occurred within six weeks after surgery, as indicated by the presence of calluses on at least three cortices on standard radiographs. Dislocation/subluxation or loss of ulnar reduction was not apparent at the final X-ray examination.

CONCLUSION

Intramedullary fixation of unstable Monteggia fractures results in excellent outcomes, provides reliable reduction and causes fewer complications.

Re-fractures of the paediatric radius and/or ulna: A systematic review

BACKGROUND

Fractures of the radius and/or ulna are one of the most common injuries in children. Evidence identifying risk factors for refracture, however, has not been summarised in a systematic review. Guidance for counselling patients and parents to minimise the risk of refracture is limited. The aims of this study are to 1) to determine if casting time 6 weeks or less is a risk factor for refracture after paediatric radius and/or ulna fractures, 2) to identify other risk factors for refracture after paediatric radius and/or ulna fractures and 3) to develop more accurate guidelines for counselling parents after a radius and/or ulna fracture in their child.

METHODS

A thorough search was performed in accordance with the Joanna Briggs Institute (JBI) guidelines for systematic review. JBI Critical Appraisal checklists were used for risk of bias assessment.

RESULTS

Diaphyseal both-bone fractures treated non-surgically should be casted for longer than 6 weeks. Surgically treated patients can be casted for less than 6 weeks. Diaphyseal and greenstick fractures have a higher risk of refracture. Residual angulation and incomplete healing in greenstick fractures may lead to a higher risk of refracture. Gender does not affect refracture risk. Falls, use of wheeled vehicles, playground activities and trampolining confer high-risk of refracture. Refracture risk is greatest up to 9 months from initial fracture.

CONCLUSION

Further case-controlled studies with sub-group analysis are required to further investigate risk factors for refracture after radius and/or ulna fractures in children.

Casting versus flexible intramedullary nailing in displaced forearm shaft fractures in children aged 7-12 years: a study protocol for a randomised controlled trial

INTRODUCTION

The forearm is the most common fracture location in children, with an increasing incidence. Displaced forearm shaft fractures have traditionally been treated with closed reduction and cast immobilisation. Diaphyseal fractures in children have poor remodelling capacity. Malunion can cause permanent cosmetic and functional disability. Internal fixation with flexible intramedullary nails has gained increasing popularity, without evidence of a better outcome compared with closed reduction and cast immobilisation.

METHOD AND ANALYSIS

This is a multicentre, randomised superiority trial comparing closed reduction and cast immobilisation to flexible intramedullary nails in children aged 7-12 years with >10° of angulation and/or >10 mm of shortening in displaced both bone forearm shaft fractures (AO-paediatric classification: 22D/2.1-5.2). A total of 78 patients with minimum 2 years of expected growth left are randomised in 1:1 ratio to either treatment group. The study has a parallel non-randomised patient preference arm. Both treatments are performed under general anaesthesia. In the cast group a long arm cast is applied for 6 weeks. The flexible intramedullary nail group is immobilised in a collar and cuff sling for 4 weeks. Data are collected at baseline and at each follow-up until 1 year.Primary outcome is (1) PROMIS paediatric upper extremity and (2) forearm pronation-supination range of motion at 1-year follow-up. Secondary outcomes are Quick DASH, Paediatric Pain Questionnaire, Cosmetic Visual Analogue Scale, wrist and elbow range of motion as well as any complications and costs of treatment.We hypothesise that flexible intramedullary nailing results in a superior outcome.

ETHICS AND DISSEMINATION

We have received ethical board approval (number: 78/1801/2020) and permissions to conduct the study from all five participating university hospitals. Informed consent is obtained from the parent(s). Results will be disseminated in peer-reviewed publications.

TRIAL REGISTRATION NUMBER

NCT04664517.

Implant removal associated complications after ESIN osteosynthesis in pediatric fractures

PURPOSE

ESIN (elastic stable intramedullary nailing) is considered the gold standard for various pediatric fractures. The aim of this study was to analyze the incidence and type of complications during or after TEN (titanium elastic nail) removal.

METHODS

A retrospective data analysis was performed. Metal removal associated complications and preoperative extraosseous length/outlet angle of TENs as possible causes of complications were assessed.

RESULTS

The complication rate in 384 TEN removals was 3.1% (n = 12). One major complication (rupture of M. extensor pollicis brevis) was documented. One refracture at the forearm occurred, however, remodeling prior TEN removal was completed. Ten minor complications were temporary or without irreversible restrictions (3 infections, 5 scaring/granuloma, 2 temporary paraesthesia). In 38 cases (16 forearms, 10 femora, 9 humeri, 3 lower legs), intra-operative fluoroscopy had to be used to locate the implants. In patients with forearm fractures, extraosseous implant length was relatively shorter than in cases without fluoroscopy (p = 0.01), but outlet angle of TENs was not significantly different in these two groups (28.5° vs 25.6°). In patients with femur fractures, extraosseous implant length and outlet angle were tendentially shorter, respectively, lower, but this did not reach statistical significance.

CONCLUSION

Removal of TENs after ESIN is a safe procedure with a low complication rate. Technically inaccurate TEN implantation makes removal more difficult and complicated. To prevent an untimely removal and patient discomfort, nail ends must be exactly positioned and cut. Intraoperative complications may be minimized with removal of TENs before signs of overgrowth.

EVIDENCE

Level III, retrospective.

Treatment of nonunion after forearm fractures in children: a conservative approach

PURPOSE

Nonunions are a very rare complication after surgical treatment of displaced forearm fractures in children, but can occur in both the radius or ulna. The aim of this study is to evaluate predisposing factors for non-unions and to discuss treatment options.

METHODS

We conducted a retrospective analysis of all patients who were treated primarily or secondary at our institution for nonunion after forearm fractures and operative treatment. Therefore, we retrospectively reviewed the medical charts and radiographs of affected patients from 1990 to 2020. We analysed demographic and fracture-related data as well as treatment options.

RESULTS

Twenty-seven cases were identified. Median age was 12 years (7-16 years). The ulna was affected in 20 cases and the radius in 7. The most common location for ulna nonunion was the middle third of the shaft, and for the radius the mid and distal shaft. In 21 cases an open reduction was required. In 9 cases technical problems were identified. In most cases (26/27) a hypertrophic nonunion occurred. 10 of 27 (37%) nonunions healed without any surgical management after 9 (7-15) months. The median age of the conservatively managed group was 10 (6-13) years, younger than in the group with managed with reoperation [median 13 (7-16) years]. Indications for surgical intervention were increasing deformity, pain and limitation of movement.

CONCLUSION

Open reduction and technical problems seem to be influencing factors. A conservative approach can be adopted in asymptomatic patients, otherwise an operative management, constituting plate osteosynthesis with or without bone grafting, should be performed.

Elastic intramedullary nail treatment of adolescent perihardware radius and ulna refracture

A 13-year-old girl presented to the clinic with a midshaft refracture of both forearm bones adjacent to the site of a prior forearm fracture that had been treated with plating. She was treated with hardware removal and placement of elastic intramedullary nails. Flexible intramedullary nailing can be successful for a skeletally mature adolescent in treatment of refracture surrounding plate fixation of a midshaft forearm fracture. This technique allows for additional protection of the entire length of the affected bones, while avoiding the extensive dissection needed for extended plating.

Antegrade Elastic Intramedullary Nailing Insertion Technique Results in Higher Incidence of Symptomatic Implants in Pediatric Ulnar Fractures

Retrograde and antegrade nailing techniques are the two options available to a surgeon when using elastic stable intramedullary nailing; however, the literature comparing these two nailing techniques is scarce. Thus, we conducted a retrospective review of all pediatric and adolescent ulnar fractures treated with elastic stable intramedullary nailing at our facility. We hypothesize that the clinical outcomes (implant and wound complications) and the time between surgery and radiographic union will be similar for both techniques.

Methods

A retrospective chart review of pediatric ulnar fracture patients treated at our facility was performed. Demographic and health information associated with the injury were collected, and the clinical outcomes of the two techniques were compared.

Results

A total of 53 patients with 54 fractures were included in this study. Antegrade nail insertion was used to treat 59.2% fractures. Radiographic union was achieved in all patients. Nail insertion technique was not associated with postoperative wound complications, time to radiographic union or implant removal, or significant deficits in upper extremity rotation (P > 0.05). Antegrade nailing resulted in a symptomatic implantation 3.97 times more frequently than compared with retrograde nailing (P = 0.036).

Discussion

Antegrade nailing demonstrates a similar healing profile but higher implant complications compared with the retrograde nailing technique in pediatric ulnar fractures.

Iatrogenic Distal Radial Physeal Fracture During Insertion of Intramedullary Fixation for a Both Bone Forearm Fracture: A Case Report

CASE

A 12-year-old boy with an isolated both bone forearm fracture was treated with closed reduction and flexible intramedullary nailing 11 days postinjury and after the loss of initial fracture alignment. On nail insertion, an intraoperative distal radial physeal fracture was encountered, thereby warranting modification in treatment.

CONCLUSION

Physeal injury is a rare intraoperative complication of intramedullary fixation of forearm fractures. This report provides insight regarding the management and prevention of this rare complication.

Elastic stable intramedullary nailing for treatment of pediatric forearm fractures: A 15-year single centre retrospective study of 173 cases

OBJECTIVE

The aim of this study was to analyze the outcomes and complications in children treated with elastic stable intramedullary nailing (ESIN) for forearm fracture.

METHODS

The study included 173 patients (126 men and 47 women; median age: 11 years (range: 3-17 years) treated with ESIN for forearm fracture between May 2002 and May 2018. Immobilization was not performed after the surgery. The median follow-up was 68 months (range: 3-161 months). The etiology, healing time, and complications were recorded.

RESULTS

All patients achieved complete radiographic healing at a median of 6.8 weeks (range: 4-11 weeks). The most common injuries were sport related (n=65) and by falling from standing height (n=57), followed by injuries from bicycle riding, motorbike accidents, road traffic accidents, and fights. Fifteen (8.76%) postoperative complications were recorded: eight entry-site skin irritations, two cases of skin infection, two refractures, and one case each of nail migration, injury of ulnar nerve, and pseudoarthrosis. All complications, except cases of refractures and pseudoarthrosis, were treated conservatively, with no long-term consequences for the patients. Patients with refractures and pseudoarthrosis were reoperated, and complete function of the extremities was fully restored.

CONCLUSION

ESIN for treatment of forearm fractures in children shows good functional and cosmetic results. This is a minimally invasive, cast-free, simple, and reproducible technique, with a low complication rate. Owing to these excellent objective and subjective results, surgical stabilization of the forearm fracture using ESIN is recommended in children and adolescents.

LEVEL OF EVIDENCE

Level IV, Therapeutic study.

The Association of Metal Frame Construct of ESIN and radiographic bone healing of pediatric forearm fractures

INTRODUCTION

The gold-standard surgical procedure of both-bone forearm shaft fracture repair is elastic stable intramedullary nailing (ESIN). Disadvantages effects of ESIN have suggested to be a consequence of inappropriate surgical techniques, while recommendations are not always followed. The purpose of the study was to analyze the effect of inadequate metal frame construct on impaired fracture healing, refracture and changing alignment.

MATERIALS AND METHODS

It is a population-based study including all consecutive patients, aged less than 16 years, who had been treated for forearm shaft fracture by ESIN during the ten-year period 2009-2018. Altogether 71 patients were included. Non-union, delayed union, and re-fracture during the following 12 months were taken as the main outcome, while inferior metal frame construct of ESIN and the surgical technique characteristics were taken the explanatory factors. Radiographic loss of reduction was a secondary outcome and a change >5° in alignment at any postoperative follow-up exam was recognized.

RESULTS

Two out of 71 fractures (3%) failed to unite, and ossifying operation was needed. Five cases (7%) showed delayed bone healing, but they ossified in five months without any intervention. These seven patients (10%) had been treated more often with larger nails (> 0.7x MCD) (p = 0.027) and by open reduction (p = 0.02), compared with thinner nails and closed reduction, respectively. Two (3%) patients had a second fracture; however, they happened 2 years after the initial injury. Other surgery or fracture related factors didn't associate with impaired ossifying. Regarding the secondary outcome, altogether 24 (35%) of the analyzed 67 patients showed >5° change in alignment during the postoperative follow-up but only one patient had clinically significant instability that required re-reduction. The alignment changed more usually in distal-third fractures, compared with middle or proximal third fractures (p = 0.019).

CONCLUSIONS

ESIN resulted in good radiographic bone healing in the vast majority (90%) of the patients and completely perfect metal frame construct was not required.

Flexible intramedullary nailing in the treatment of forearm fractures in children and adolescents, a systematic review

Background

Forearm fractures are common injuries among children and adolescents. Traditionally, they were managed conservatively with closed reduction and cast immobilization. The last decade there is an increasing trend towards operative treatment. The treatment modalities available include plate and screws, flexible intramedullary nailing and external fixation devices - rarely used nowadays. The aim of this systematic review is to investigate the indications of flexible intramedullary nailing in the childhood population, to compare its results with plating and to provide detailed information considering technical pitfalls and complications that may be encountered.

Materials and methods

An extensive search was performed in the electronic databases (PubMed, EMBASE) from their inception up to June 2019 in order articles relevant to this review to be retrieved. The search terms used were the following: forearm fracture, both-bone fracture, pediatric, nailing, fixation. 56 articles were considered suitable for inclusion.

Results

The indications for surgery are unstable and irreducible fractures, open and fractures with neurovascular compromise. As far as the fracture site is concerned, radius and ulna shaft fractures, radial head and Monteggia fractures are suitable for nailing.Although plates and nailing have comparable clinical outcomes and complication rates, flexible intramedullary nailing has the advantage of smaller incisions, less tissue disruption, shorter operative and hospital times and an ease in hardware removal.Controversy exists over the need of single or double nailing in both-bone fractures of the forearm. In addition, there is no consensus as to which is the preferred nail diameter. Yet, all the authors agree that open reduction must be considered after certain failed closed reductions in order compartment syndrome to be avoided.Flexible intramedullary nailing is not complication-free. Skin irritation, Extensor Pollicis Longus rupture, superficial radial nerve injury, delayed union or even nonunion, malunion and refractures are some of the complications that may be encountered.

Discussion

Flexible nails are excellent implants combining stability and elasticity. The procedure of passing the nails across radius and ulna is relatively simple, requiring a small learning curve. Flexible intramedullary nailing is an excellent treatment modality for the treatment of forearm fractures in children and adolescents.

Is there a standard treatment for displaced pediatric diametaphyseal forearm fractures?: A STROBE-compliant retrospective study

To review our institutional results and assess different surgical and non-surgical techniques for the treatment of displaced diametaphyseal forearm fractures in children and adolescents.Thirty-four children (25M, 9F) with a total of 36 diametaphyseal forearm fractures who underwent treatment under general anesthesia between July 2010 and February 2016 were recruited to this retrospective study. From October 2016 until March 2018 patients and/or parents were contacted by telephone and interviewed using a modified Pediatric Outcomes Data Collection Instrument (PODCI).Median age at the time of injury was 9.1 years (range, 1.9-14.6 years). Initial treatment included manipulation under anesthesia (MUA) and application of plaster of Paris (POP) (n = 9), elastic stable intramedullary nailing (ESIN) (n = 10), percutaneous insertion of at least one Kirschner wire (K-wire) (n = 16), and application of external fixation (n = 1). Eleven children (32%) experienced a total of 22 complications. Seven complications were considered as major, including delayed union (n = 1) and extensor pollicis longus (EPL) tendon injury (n = 1) following ESIN, as well as loss of reduction (n = 2) and refractures (n = 3) after MUA/POP. The median follow-up time was 28.8 months (range, 5.3-85.8 months). In 32 out of 34 cases (94%) patients and/or parents were contacted by telephone and a PODCI score was obtained. Patients who experienced complications in the course of treatment had a significantly lower score compared with those whose fracture healed without any sequelae (P = .001). There was a trend towards an unfavorable outcome following ESIN compared with K-wire fixation (P = .063), but not compared with POP (P = .553). No statistical significance was observed between children who were treated initially with a POP and those who had K-wire fixation (P = .216).There is no standard treatment for displaced pediatric diametaphyseal forearm fractures. Management with MUA/POP only is associated with an increased refracture rate. Based on our experience K-wire fixation including intramedullar positioning of at least one pin seems to be favorable compared with ESIN.

Hybrid Fixation in Pediatric Forearm Fractures, does it Predispose to Non-union? A Case Report and Literature Review

INTRODUCTION

Pediatric fracture non-union is rare, with limited published evidence available. Whilst there have been certain predisposing factors identified throughout case reports/series, we present a case, hypothesizing a previously undocumented risk factor for non-union.

CASE REPORT

A 9-year-old boy sustained closed, diaphyseal both bone forearm fractures. He underwent a hybrid fixation (plate fixation of the ulnar and elastic stable intramedullary nail of the radius). Whilst the ulnar fracture healed well, the radial fracture went on to non-union before a second procedure was performed, metalwork removed, and a compression plate utilized. At 2-month post-radial compression plate, there was a union at this site.

CONCLUSIONS

There are numerous risk factors for non-union in pediatric fractures which have previously been highlighted throughout literature. We present a case hypothesizing a new risk factor, of hybrid fixation, for pediatric non-union.

Refracture of the Pediatric Forearm with Intramedullary Nails in situ

INTRODUCTION

There are few described cases in literature describing the management of refracture of both bone forearm fractures with elastic stable intramedullary nails (ESIN) in situ. We describe our experience and discuss it in the context of existing reports.

CASE REPORT

A 6-year-old girl presented to our unit with a refracture of her forearm with ESIN in situ following a trauma, 5 months post her index injury and ESIN procedure. She was managed with closed reduction under general anesthesia with a good outcome.

DISCUSSION

Treatment of this unusual injury is challenging given the paucity of evidence to inform management. Many existing case series fail to report this complication. We echo those studies that have employed similar strategies and note potential complications associated with this management including altered biomechanics of the ESIN.

CONCLUSION

Closed reduction of a refracture of pediatric forearm with ESIN in situ is an acceptable approach to this unusual injury. Caution must be taken intraoperatively and postoperatively to account for any biomechanical deficiencies in the ESIN resulting from the forces applied to cause the refracture and forces applied to the in situ nails to achieve correction intraoperatively.

Intramedullary nailing of forearm shaft fractures by biodegradable compared with titanium nails: Results of a prospective randomized trial in children with at least two years of follow-up

There are disadvantages in Elastic Stable Intramedullary Nailing (ESIN) of forearm-shaft fractures, such as the need of implant removal. Biodegradable Intramedullary Nailing (BIN) is a new technique developed for these fractures. We hypothesized that there is no difference in rotational ROM between the patients treated by BIN vs. ESIN. A randomized, controlled clinical trial included patients, aged 5-15 years, requiring surgery for forearm-shaft fractures. Biodegradable polylactide-co-glycolide (PLGA) nails (Activa IM-Nail™, Bioretec Ltd., Finland) were used in 19 and titanium nails (TEN^®, SynthesDePuy Ltd., USA) in 16 patients. Rotational ROM of forearm after two years was the primary outcome. Elbow and wrist ROM, pain and radiographic bone healing were secondary outcomes. Forearm rotation was mean 162° and 151° in BIN and ESIN groups, respectively (P = 0.201). No difference between the groups was found in any other ROMs. Three cases in the ESIN vs. none in the BIN group reported pain (P = 0.113). There was no clinically significant residual angulation in radiographs. Two adolescents in the BIN group vs. none in the ESIN (P = 0.245) were excluded because of implant failure; another two with complete bone union suffered from re-injury. Therefore, satisfactory implant stability among older children needs to be studied.

Intraoperative sonography may reduce the risk of extensor pollicis longus tendon injury during dorsal entry elastic intramedullary nailing of the radius in children

Extensor pollicis longus tendon (EPL) injury is a potential complication of dorsal entry radial elastic nailing technique in children. The aim of this study was to investigate if intraoperative ultrasonographic guidance can reduce the risk of (EPL) injury.Correlation between sonographic and operative findings were examined first in 6 adult cadavers. Position of Lister's tubercle, EPL, and extraosseal end of the elastic nail were detected by ultrasound imaging during a minimally invasive dorsal entry nailing. Radial slope of Lister's eminence was determined as a safe and easily identifiable entry point for opening the medullary canal. Extraosseal ends of the nails were bended in a slight radial direction and cut immediately beneath the skin in a maximally palmar-flexed wrist position. Cadaveric dissections followed our procedures all correlated with ultrasonographic findings, we have not seen tendon damage, obstruction or friction by the implant's end.After cadaveric experiments, we began using intraoperative sonography for monitoring elastic nail insertion in pediatric radial fractures.Between January 2015 and November 2016, 77 pediatric closed diaphyseal radial fractures were operated by dorsal approach ESIN under intraoperative sonographic checking.Procedures were executed by 2 orthopedic surgeons experienced in ESIN technique with basic musculoskeletal ultrasonographic qualifications.Sonographic identification of EPL and Lister's tubercle in the transverse view was possible in all cases. Determination of the position of the nail end to EPL was also possible in all cases. Mean distance of the transverse view center of the EPL and nail was 0.49 cm (range 0.3-0.62 cm, SD = 0.66). Based on the sonographic transverse view, the operator decided repositioning the nails by 2 patients.We have not found EPL injury postoperatively. All patients were followed for at least 12 months after operations. Nails were removed in all children without further complications.Intraoperative sonography helps determining optimal insertion point and the risk of EPL injury may be reduced during dorsal entry approach.Although the procedure is relatively easy, authors take note that surgical and sonoanatomic knowledge, basic sonographic skills and experience in the ESIN technique are equally necessary for its successful application. A greater number of cases is necessary to confirm our initial promising experiences.

Optimizing Management of Open Fractures in Children

Open fractures in children differ from adults owing to their better healing potential. Management strategies for open fracture in children are changing with improvement in our understanding of soft-tissue reconstruction and fracture fixation. A literature review was performed for articles covering management of open fractures in children. The cornerstones of management include prevention of infection, debridement, and skeletal stabilization with soft-tissue coverage. The injury should be categorized according to the established trauma classification systems. Timely administration of appropriate antibiotics is important for preventing infections. Soft-tissue management includes copious irrigation and debridement of the wound. Fractures can be stabilized by a variety of nonoperative and operative means, taking into consideration the special needs of the growing skeleton and the role of a thick and active periosteum in the healing of fractures. The soft-tissue coverage required depends on the grade of injury.