Orthopedic aspects of child abuse

Abusive Pediatric Thoracolumbar Fracture Due to Forced Hyperextension: Case Report, Biomechanical Considerations, and Review of the Literature

Pediatric thoracolumbar fractures are rare due to the physiological differences which afford greater resilience to the immature spine. Most pediatric thoracolumbar fractures occur as the result of high energy trauma, such as motor vehicle accidents, and modes of reasonable accidental injuries are limited by age and developmental capabilities of the child. These fractures can occur as the result of inflicted blunt force trauma and child abuse, and in most cases, the mechanism of injury to the spine is not known. We report the death of a 29-month-old man due to blunt force trauma to the back and forced hyperextension of the thoracolumbar spine causing fracture of the fourth lumbar (L4) vertebral body. A complete forensic examination revealed a previous healing fracture of the anterior aspect of the L4 vertebral body, with acute disruption of the anterior longitudinal ligament overlying the fracture site, complete fracture of the vertebral body, and fatal retroperitoneal hemorrhage. We present a review of the biomechanical considerations of the pediatric spine, a survey of pediatric spinal fractures, and a review of the literature on pediatric abusive thoracolumbar fractures. In this case, there was never a provided explanation for how the injury occurred; however, understanding the biomechanics of the pediatric spine allowed for the determination of the mechanism, force required to produce this specific pattern of abusive spinal injury, and the manner of death.

Imaging in paediatric spinal injury

Background

Paediatric spinal injury is rare and exhibits many unique features. Attending clinicians and radiologists often lack knowledge, expertise and experience in dealing with a potential injury to the paediatric spine. Within the paediatric age range itself there are different age-dependent mechanisms that can injure the paediatric spine. Moreover, the anatomical features and degree of osseous maturity of the developing paediatric spine determine the biomechanical characteristics which promote unique patterns of spinal injury in each paediatric age group.

Methods

An expert illustrated narrative review of the literature.

Results

Multiple factors make the imaging interpretation of the injured paediatric spine challenging. Each imaging modality has strengths and weaknesses in depicting spinal anatomy which vary with the type of spinal injury and age of the paediatric patient.

Conclusions

Attending doctors need to be familiar with the imaging appearances of the normal paediatric spine, its normal variants as well as the imaging features characteristics of paediatric spinal injury seen on radiographs, computed tomography and magnetic resonance imaging.

Intraobserver and interobserver reliability and the role of fracture morphology in classifying femoral shaft fractures in young children

BACKGROUND

Spiral fractures of long bones have long been cited as indications of non-accidental trauma (NAT) in children; however, fracture types are only loosely defined in the literature, and intraobserver and interobserver variability in defining femoral fracture patterns is rarely mentioned. We sought to determine reliability in classifying femoral fractures in young children using a standard series of radiographs shown to physicians with varied backgrounds and training and to determine if a quantitative approach based on objective measurements made on plain radiographs could improve definition of these fractures.

METHODS

On 50 radiographs, the fracture ratio--fracture length divided by bone diameter--was determined and radiographs were reviewed by 14 observers, including pediatric orthopaedic surgeons, emergency room physicians, and musculoskeletal radiologists, who classified the fractures as transverse, oblique, or spiral. A second review of the images in a different order was carried out at least 10 days after the first.

RESULTS

Overall, intraobserver agreement was strong, whereas interobserver reliability was moderate. Experience level did not correlate with either result. Complete agreement among all observers occurred for only 5 fractures: 3 transverse and 2 spiral. An average fracture ratio near 1.0 appeared to be predictive of a transverse fracture and a ratio of >3.0, a spiral fracture; ratios between these 2 values resulted in essentially random classification.

CONCLUSIONS

The ability to reproducibly classify femoral fractures in young children is highly variable among physicians of different specialties. These results support the belief that fracture morphology has little predictive value in NAT because of the wide variability in what observers classify as a spiral fracture of the femur. Caution should be used in the use of descriptive terms such as spiral, oblique, or transverse when classifying femoral fractures, as well as when evaluating children for possible NAT, because of the variability in classification.

LEVEL OF EVIDENCE

Level III-diagnostic study.

Pediatric nonaccidental injury: are orthopedic surgeons vigilant enough?

BACKGROUND

Nonaccidental pediatric injuries are major cause of morbidity and mortality, with fractures being second to soft-tissue injuries as the most common presentation. As the orthopedic surgeon might be the only physician an abused child would encounter, the role of the orthopedic surgeon is of great importance. It includes recognition, treatment, and appropriate report of suspected child abuse. The purpose of this study is to examine the attitude and knowledge of orthopedic surgeons treating suspected nonaccidental injuries.

METHODS

Evaluation of orthopedic surgeons included level of knowledge regarding pediatric nonaccidental injury, common practice, and reporting attitudes to Child Protection Services. We specifically examined whether seniority and professional experience had effect on knowledge and performance. Data were collected by a questionnaire distributed to orthopedic surgeons.

RESULTS

The study cohort includes 130 orthopedic surgeons. As much as 62.3% of participating physicians had 10 years or less experience practicing as orthopedic surgeons, and 37.7% had more than 10 years of experience. A mean of 2.39 cases of suspected child abuse was treated over the last year by the physicians that completed the questionnaire. Thirty-five percent of the responders had specific targeted training with respect to the "violence toward minors or helpless reporting obligation law." Of the participating physicians, 89.2% stated that they thought it is the responsibility of the orthopedic surgeons to raise the suspicion for child abuse and refer the child and his/her parents to Child Protection Services. When treating a case of suspected nonaccidental injury, 61.2% of experienced physicians stated that they try to find out what caused the symptoms as opposed to 81.5% of less-experienced physicians (P = 0.011).

CONCLUSIONS

The study findings suggest that many orthopedic surgeons--both senior physicians and less-experienced physicians--can benefit by improved education and training modality related to pediatric nonaccidental injury. More-experienced physicians had lesser awareness and tendency to further investigate cases with suspected nonaccidental injury compared with less-experienced physicians.

LEVEL OF EVIDENCE

Level III-retrospective study.

Symptoms and time to medical care in children with accidental extremity fractures

BACKGROUND AND OBJECTIVE

Delay in seeking medical care is one criterion used to identify victims of abuse. However, typical symptoms of accidental fractures in young children and the time between injury and the seeking of medical care have not been reported. We describe patient and injury characteristics that influence the time from injury to medical care.

METHODS

Parental interviews were conducted for children <6 years old with accidental extremity fractures. Demographic characteristics, signs and symptoms of the injury, and fracture location and severity were described and examined for their association with a delay (>8 hours) in seeking medical care.

RESULTS

Among 206 children, 69% had upper extremity fractures. The median time to the first medical evaluation was 1 hour, but 21% were seen at >8 hours after injury. Although 91% of children cried after the injury, only 83% were irritable for >30 minutes. Parents observed no external sign of injury in 15% of children, and 12% used the injured extremity normally. However, all parents noted at least 1 sign or symptom. Minority children (odds ratio [OR]: 2.54 [95% confidence interval [CI]: 1.18-5.47), those with lower extremity injuries (OR: 2.23 [95% CI: 1.01-4.90]), those without external signs of injury (OR: 3.40 [95% CI: 1.36-8.51]), and those with continued extremity use (OR: 3.26 [95% CI: 1.22-8.76]) were more likely to delay seeking medical care.

CONCLUSIONS

Although some children did not manifest all expected responses, no child with an accidental fracture was asymptomatic. Delay in seeking medical care was associated with more subtle signs of injury; however, delays identified in minority patients are unexplained.

Do resuscitation-related injuries kill infants and children?

Occasionally, individuals accused of inflicting fatal injuries on infants and young children will claim some variant of the "CPR defense," that is, they attribute the cause of injuries found at autopsy to their "untrained" resuscitative efforts. A 10-year (1994-2003) historical fixed cohort study of all pediatric forensic autopsies at the Miami-Dade County Medical Examiner Department was undertaken. To be eligible for inclusion in the study, children had to have died of atraumatic causes, with or without resuscitative efforts (N(atraumatic) = 546). Of these, 382 had a history of cardiopulmonary resuscitation (CPR; average age of 4.17 years); 248 had CPR provided by trained individuals only; 133 had CPR provided by both trained and untrained individuals; 1 had CPR provided by untrained individuals only. There was no overlap between these 3 distinct groups. Twenty-two findings potentially attributable to CPR were identified in 19:15 cases of orofacial injuries compatible with attempted endotracheal intubation; 4 cases with focal pulmonary parenchymal hemorrhage; 1 case with prominent anterior mediastinal emphysema; and 2 cases with anterior chest abrasions. There were no significant hollow or solid thoracoabdominal organ injuries. There were no rib fractures. The estimated relative risk of injury subsequent to resuscitation was not statistically different between the subset of decedents whose resuscitative attempts were made by trained individuals only, and the subset who received CPR from both trained and untrained individuals. In the single case of CPR application by an untrained individual only, no injuries resulted. The remaining 164 children dying from nontraumatic causes and who did not undergo resuscitative efforts served as a control group; no injuries were identified. This study indicates that in the pediatric population, injuries secondary to resuscitative efforts are infrequent or rare, pathophysiologically inconsequential, and predominantly orofacial in location. In our population, CPR did not result in any rib fractures or significant visceral injuries. Participation of nonmedical or untrained individuals in resuscitation did not increase the likelihood of injury.

Child abuse and orthopaedic injury patterns: analysis at a level I pediatric trauma center

BACKGROUND

Child abuse is a serious threat to the physical and psychosocial well-being of the pediatric population. Musculoskeletal injuries are common manifestations of child abuse. There have been multiple studies that have attempted to identify the factors associated with, and the specific injury patterns seen with musculoskeletal trauma from child abuse, yet there have been no large studies that have used prospectively collected data and controlled comparisons. The purpose of our study was to describe the patterns of orthopaedic injury for child abuse cases detected in the large urban area that our institution serves, and to compare the injury profiles of these victims of child abuse to that of general (accidental) trauma patients seen in the emergency room and/or hospitalized during the same time period.

METHODS

This study is a retrospective review of prospectively collected information from an urban level I pediatric trauma center. Five hundred cases of child abuse (age birth to 48 mo) were identified by membership in our institution's Suspected Child Abuse and Neglect database collected between 1998 and 2007. These cases were compared against 985 general trauma (accidental) control patients of the same age group from 2000 to 2003. Age, sex, and injury type were compared.

RESULTS

Victims of child abuse were on average younger than accidental trauma patients in the cohort of patients under 48 months of age. There was no difference in sex distribution between child abuse and accidental trauma patients. When the entire cohort of patients under 48 months were examined after adjusting for age and sex, the odds of rib (14.4 times), tibia/fibula (6.3 times), radius/ulna (5.8 times), and clavicle fractures (4.4 times) were significantly higher in child abuse versus accidental trauma patients. When regrouping the data based on age, in patients younger than 18 months of age, the odds of rib (23.7 times), tibia/fibula (12.8 times), humerus (2.3 times), and femur fractures (1.8 times) were found to be significantly higher in the child abuse group. Yet, in the more than 18 months age group, the risk of humerus (3.4 times) and femur fractures (3.3 times) was actually higher in the accidental trauma group than in the child abuse group.

CONCLUSIONS

Patients who present to an urban level I pediatric trauma center and are victims of abuse are generally younger, and have an equal propensity to be male or female. It is important for the clinician to recognize that the age of the patient (younger or older than 18 mo and/or walking age) is an important determinant in identifying injury patterns suspicious for abuse. Patients below the age of 18 months who present with rib, tibia/fibula, humerus, or femur fractures are more likely to be victims of abuse than accidental trauma patients. Yet, when patients advance in age beyond 18 months, their presentation with long bone fractures (ie, femur and humerus) is more likely to be related to accidental trauma than child abuse.

LEVEL OF EVIDENCE

level III, prognostic study.

Inflicted skeletal trauma: the relationship of perpetrators to their victims

OBJECTIVE

Although inflicted skeletal trauma is a very common presentation of child abuse, little is known about the perpetrators of inflicted skeletal injuries. Studies exist describing perpetrators of inflicted traumatic brain injury, but no study has examined characteristics of perpetrators of inflicted skeletal trauma.

METHODS

All cases of suspected child physical abuse evaluated by the child abuse evaluation teams at Vanderbilt University Medical Center (January 1996 to August 2000) and at the Children's Hospital at Denver (January 1996 to December 1999) were reviewed for the presence of fractures. All children with inflicted fractures were entered into the study, and demographic data, investigative data, and identity of perpetrators were collected.

RESULTS

There were a total of 630 fractures for 194 patients. The median number of fractures per patient was 2, and the maximum was 31. Sixty-three percent of children presented with at least one additional abusive injury other than the fracture(s). Perpetrators were identified in 79% of the cases. Nearly 68% of the perpetrators were male; 45% were the biological fathers. The median age of the children abused by males (4.5 months) significantly differed from the median age of those abused by females (10 months) (p=.003).

CONCLUSION

In the cases where a perpetrator of inflicted fractures could be identified, the majority were men, most commonly the biological fathers. Children injured by men were younger than those injured by women.

Assessment and follow-up of suspected child abuse in preschool children with fractures seen in a general hospital emergency department

OBJECTIVE

To evaluate the emergency department assessment and follow-up of possible child abuse in children with fractures.

METHODS

A retrospective audit was conducted of children up to 3 years of age who presented with a fracture to a general hospital emergency department over a 2-year period.

RESULTS

In the 98 cases included, there was no documentation of complete physical examination in 57% of cases, whether the injury was witnessed in 54%, or time of injury in 18%. In 27% of cases the history documented was too brief to assess consistency of the injury with the history. Seventy-five per cent of children with known prior injuries did not have their past history documented. In 80% of all cases there was no indication that the emergency department doctor had considered the possibility of child abuse. Emergency doctors did not recognize four out of 16 cases (25%) with inconsistent histories. There was poor follow-up of patients in whom abuse was suspected: 46% of children less than 2 years had neither a skeletal survey nor bone scan. Patients referred to a paediatrician by the emergency department were significantly more likely to have a skeletal survey performed and to have the diagnosis of child abuse confirmed.

CONCLUSIONS

Emergency department staff in a general hospital do not document or assess for all of the indicators of child abuse in a high-risk population and they do not document consideration of the diagnosis in the majority of cases. Emergency department staff need more training and more resources to allow for full assessment of child abuse. Suspected child abuse cases should be referred to a paediatrician to improve investigation and follow-up.

Spinal injuries in children

BACKGROUND/PURPOSE

Traumatic spinal injury (TSI) is an uncommon source of morbidity and mortality in children. The aim of this study was to describe childhood TSI in a single level 1 urban pediatric trauma center.

METHODS

The authors retrospectively analyzed all children younger than 14 years with TSI, treated at a level I pediatric trauma center between 1991 and 2002 (n = 406, 4% total registry). All children were stratified according to demographics, mechanisms, type and level of injury, radiologic evaluations, associated injuries, and mortality.

RESULTS

The mean age was 9.48 +/- 3.81 years. The most common overall mechanism of injury was motor vehicle crash (MVC; 29%) and ranked highest for infants. Falls ranked highest for ages 2 to 9 years. Sports ranked highest in the 10 to 14 year age group. Paravertebral soft tissue injuries were 68%. The most common injury level was the high cervical spine (O-C4). The incidence of spinal cord injury without radiologic abnormality (SCIWORA) was 6%. Traumatic brain injury (37%) was the most common associated injury. Overall mortality rate was 4% in this urban catchment.

CONCLUSIONS

TSI in children requires a different preventive and therapeutic logarithm compared with that of adults. The potential devastating nature of TSI warrants that the health care team always maintains a high index of suspicion for injury. Future prospective studies are needed to further elucidate injury patterns.

Development and duration of radiographic signs of bone healing in children

OBJECTIVE

Few articles report the evaluation of pediatric fracture healing and dating based on radiographic appearance. We established a timetable for expected radiographic changes visible during bone healing in otherwise healthy children.

MATERIALS AND METHODS

We examined 707 radiographs of fractured forearms in 141 patients. Each fracture was assessed by a pediatric radiologist who was unaware of the timing of the initial injury. Assessment included the following features: fracture margins, fracture gap, periosteal reaction, callus, bridging, and remodeling. The time interval between injury and the appearance of the radiographic features and the duration of radiographic signs were determined and correlated with age, sex, angulation, displacement, and location.

RESULTS

Sclerosis at the fracture margins was evident in 85% of fractures 5 weeks after injury. Widening of the fracture gap was observed in 62% of fractures at 6 weeks. Periosteal reaction was evident on all images by 4 weeks, and after 7 weeks, periosteal reaction was separable from cortex in only 10% of fractures. Fracture callus had a density equal to or greater than that of adjacent cortex 10 weeks after injury in 90% of fractures.

CONCLUSION

A wide variation exists in the appearance and duration of the radiographic signs of bone healing. Marginal sclerosis should be an expected radiographic sign of normal bone healing. Applying maximum and minimum time spans to objective radiographic signs may aid in fracture dating.

Accidental and nonaccidental femur fractures in children

A retrospective review of 207 patients younger than 6 years of age who sustained nonpathologic diaphyseal femur fractures was done, which emphasized the characteristics of accidental versus nonaccidental injury. There were 214 fractures in 123 boys and 83 girls (the gender of one patient was unknown). The average age of the patients was 2.73 years. Mechanisms of injury were pedestrian struck by a car (62 patients), falls (92 patients), and motor vehicle accidents (10 patients). Nineteen patients did not have a history of trauma. Seventy-six cases were investigated for child abuse. The results of 13 investigations were positive. Overall, the morphologic features of the fractures were transverse (38%), spiral (27%), and oblique (17%). In the investigated group, 27% of the fractures were transverse, 39% were spiral, and 15% were oblique. In those cases with positive results of the investigation, 36% of the fractures were transverse, 36% were spiral, and 7% were oblique. Although transverse fractures are most common in accidental and nonaccidental injuries, many practitioners think spiral fractures are pathognomonic of abuse. The current data show that although spiral fractures were less common than transverse fractures overall, and no more common in the cohort of patients in whom the results of the child abuse investigations were positive, they were overrepresented in the cohort that was investigated. This suggests that spiral fractures are viewed as particularly suspicious, which may lead to missed cases of nonaccidental injury in children with transverse fractures.

Emergency department evaluation and treatment of pediatric orthopedic injuries

Orthopedic injuries in children are unique in terms of the mechanisms of injury, pathophysiology, and healing. This article reviews the pediatric fracture patterns and common pediatric injuries or complaints seen in the emergency department, with an emphasis on management in the emergency department. Additionally, the approach to pediatric cervical spine injuries and child abuse will be described as it pertains to the emergency physician.

The limping child

A child who limps or complains of limb pain presents a diagnostic challenge for the emergency physician. Fortunately, only a few causes require emergency treatment. This article provides the physician with a systematic approach for evaluating these patients. Detailed discussion is provided for some of the more prevalent, urgent, and age-specific diagnoses of limb pain and limping.