The SBU report: a different view

Characteristics and associations of ocular and non-ocular manifestations of shaken baby syndrome

OBJECTIVES

Shaken baby syndrome (SBS), a subset of abusive head trauma, results from non-accidental, violent head shaking. Most survivors suffer permanent neurological sequelae. Accurate diagnosis is imperative and remains challenging. The purpose of this study is to describe ocular injuries and associated neurotrauma in suspected SBS.

METHODS

We retrospectively surveyed the National Trauma Data Bank 2008-2014 for patients ≤ 3 years old admitted for suspected SBS. Statistical analysis was performed with SPSS software. Significance was set at p < 0.05.

RESULTS

Three hundred forty-seven (13.9%) of 2495 patients who were ≤ 3 years old were admitted with abusive head trauma and ocular injuries which resulted from suspected SBS. Most were < 1 year old (87.9%) and male (54.2%). Common eye injuries were retinal hemorrhages (30.5%), eye/adnexa contusion (14.7%), and retinal edema (10.7%). Common neurotrauma were subdural (75.5%), subarachnoid (23.9%), and intracerebral hemorrhage (ICH) (10.4%). Mean (SD) Injury Severity Score was severe, 20.2 (8.2), and Glasgow Coma Score was moderate, 9.2 (12.8). The mortality rate was 16.7%. Retinal hemorrhages were not significantly associated with one type of neurotrauma over others. Ocular/adnexa contusion (OR 4.06; p < 0.001) and commotio retinae/Berlin's edema (OR 5.27; p < 0.001) had the greatest association with ICH than other neurotrauma. Optic neuropathy (OR 21.33; p < 0.001) and ICH (OR 3.34; p < 0.001) had the highest associated with mortality.

CONCLUSIONS

Our study supports previous studies showing that retinal and subdural hemorrhages were the most common ocular injury and neurotrauma in SBS, respectively. However, we did not find a significant propensity for their concurrence. Commotio retinae/Berlin's edema was significantly associated with both intracerebral and subdural hemorrhages.

Occurrence of traumatic brain injury due to short falls with or without a witness by a nonrelative in children younger than 2 years

OBJECTIVE

There is disagreement about the occurrence of severe traumatic brain injury, especially subdural hematoma, caused by short falls in very young children. To verify intracranial injury due to these falls and examine its characteristics, the authors compared infants and toddlers with head trauma witnessed by a nonrelative with those whose injuries were not witnessed by a nonrelative.

METHODS

The authors retrospectively reviewed clinical records of children younger than 2 years with head trauma due to a short fall who visited the emergency department of the National Center for Child Health and Development in Japan between April 2015 and March 2018. Patients were classified into two groups: falls that were witnessed by a nonrelative and falls not witnessed by a nonrelative. The authors compared the age in months, sex, mechanism of injury, fall height, prevalence rate of intracranial injury, skull fracture, type of traumatic brain injury, retinal hemorrhage, rib or long-bone fracture, and outcomes between patients whose fall was witnessed by a nonrelative and those whose fall was not witnessed by a nonrelative.

RESULTS

Among 1494 patients included in the present analysis, 392 patients were classified into the group of falls witnessed by a nonrelative, and 1102 patients were classified into the group of falls that were not witnessed by a nonrelative. The prevalence rates of intracranial injury, skull fracture, epidural hematoma, and subarachnoid hemorrhage were equal between the groups. The prevalence rate of subdural hematoma in the group whose falls were witnessed by a nonrelative was significantly lower than that of the other group (p = 0.027). There were no patients with subdural hematoma, retinal hemorrhage, or neurological sequelae in the group whose fall was witnessed by a nonrelative.

CONCLUSIONS

Subdural hematoma, retinal hemorrhage, and neurological sequelae due to short falls were not seen after witnessed falls in the present study.

A review on four different paths to respiratory arrest from brain injury in children; implications for child abuse

Child abuse was suspected in a case of out-of-hospital arrest with minor brain injuries. Confronted with continued disputes on pathophysiologic correlates even after autopsy, to assist the differentiation of potential causes of sudden cardiopulmonary arrest in children, we tried to identify the mechanism of cardiopulmonary arrest in brain injuries from different causes. Systematic review was carried out in two stages. First, major external causes of cardiopulmonary arrest among children and infants were identified from Pubmed and Google Scholar search, and then the exact sequence of cardiopulmonary arrest, and their pathophysiologic features were identified based on articles of animal models of brain injury. From the review, we have identified four major groups of external circumstances for rather sudden cardiopulmonary arrest from brain damage in children, after excluding congenital and other unrelated diseases; 1) impact brain apnea, 2) anoxic insults, 3) drug or other substance induced central nervous system depression, and 4) traumatic brain damage. Each group has different features in the course of cardiac and respiratory arrests. Based on this review of pathophysiologic features of cardio-respiratory responses from external causes, we have presented a suspected, but unlikely, child abuse case of respiratory arrest from brain injury. The social consequences of both unknowingly missing, and falsely incriminating the abuse can be grave, and the identification of the mechanisms of cardiopulmonary arrest from brain injury can be important for the differentiation of various potential causes.

Consensus statement on abusive head trauma in infants and young children

Abusive head trauma (AHT) is the leading cause of fatal head injuries in children younger than 2 years. A multidisciplinary team bases this diagnosis on history, physical examination, imaging and laboratory findings. Because the etiology of the injury is multifactorial (shaking, shaking and impact, impact, etc.) the current best and inclusive term is AHT. There is no controversy concerning the medical validity of the existence of AHT, with multiple components including subdural hematoma, intracranial and spinal changes, complex retinal hemorrhages, and rib and other fractures that are inconsistent with the provided mechanism of trauma. The workup must exclude medical diseases that can mimic AHT. However, the courtroom has become a forum for speculative theories that cannot be reconciled with generally accepted medical literature. There is no reliable medical evidence that the following processes are causative in the constellation of injuries of AHT: cerebral sinovenous thrombosis, hypoxic-ischemic injury, lumbar puncture or dysphagic choking/vomiting. There is no substantiation, at a time remote from birth, that an asymptomatic birth-related subdural hemorrhage can result in rebleeding and sudden collapse. Further, a diagnosis of AHT is a medical conclusion, not a legal determination of the intent of the perpetrator or a diagnosis of murder. We hope that this consensus document reduces confusion by recommending to judges and jurors the tools necessary to distinguish genuine evidence-based opinions of the relevant medical community from legal arguments or etiological speculations that are unwarranted by the clinical findings, medical evidence and evidence-based literature.

Factors influencing child protection professionals' decision-making and multidisciplinary collaboration in suspected abusive head trauma cases: A qualitative study

Clinicians face unique challenges when assessing suspected child abuse cases. The majority of the literature exploring diagnostic decision-making in this field is anecdotal or survey-based and there is a lack of studies exploring decision-making around suspected abusive head trauma (AHT). We aimed to determine factors influencing decision-making and multidisciplinary collaboration in suspected AHT cases, amongst 56 child protection professionals. Semi-structured interviews were conducted with clinicians (25), child protection social workers (10), legal practitioners (9, including 4 judges), police officers (8), and pathologists (4), purposively sampled across southwest United Kingdom. Interviews were recorded, transcribed and imported into NVivo for thematic analysis (38% double-coded). We identified six themes influencing decision-making: 'professional', 'medical', 'circumstantial', 'family', 'psychological' and 'legal' factors. Participants diagnose AHT based on clinical features, the history, and the social history, after excluding potential differential diagnoses. Participants find these cases emotionally challenging but are aware of potential biases in their evaluations and strive to overcome these. Barriers to decision-making include lack of experience, uncertainty, the impact on the family, the pressure of making the correct diagnosis, and disagreements between professionals. Legal barriers include alternative theories of causation proposed in court. Facilitators include support from colleagues and knowledge of the evidence-base. Participants' experiences with multidisciplinary collaboration are generally positive, however child protection social workers and police officers are heavily reliant on clinicians to guide their decision-making, suggesting the need for training on the medical aspects of physical abuse for these professionals and multidisciplinary training that provides knowledge about the roles of each agency.

Shaken baby syndrome and the risk of losing scientific scrutiny

A systematic review of shaken baby syndrome by the Swedish Agency for Health Technology Assessment and Assessment of Social Services generated numerous reactions from professional organisations, even before the review was published. There was also a lively debate after a paper summarising its findings were published in Acta Paediatrica The various responses are worth debating further, as they raise several important issues with regard to research ethics, having an open debate and publishing scientific findings.

CONCLUSION

The responses to the shaken baby syndrome report indicate that scientific scrutiny risks being lost when researchers and organisations are not open to challenging established ideas.