Outcome of children with prolonged unconsciousness and vegetative states

Disorders of Consciousness in Children: Assessment, Treatment, and Prognosis

Children with acquired brain injury may experience prolonged disorders of consciousness (DoC); research on children with DoC lags behind adult literature. Rigorous evaluation of assessment tools used in children with DoC is lacking, though recent developments may contribute to improvements in care, particularly for assessment of young children and those without overt command following. Literature on prognosis continues to grow, reinforcing that early signs of consciousness suggest better long-term outcome. Although large clinical trials for children with DoC are lacking, single-site and multisite programmatic data inform standards of care and treatment options for children with DoC.

Scoping Review on the Diagnosis, Prognosis, and Treatment of Pediatric Disorders of Consciousness

BACKGROUND AND OBJECTIVES

Comprehensive guidelines for the diagnosis, prognosis, and treatment of disorders of consciousness (DoC) in pediatric patients have not yet been released. We aimed to summarize available evidence for DoC with >14 days duration to support the future development of guidelines for children, adolescents and young adults aged 6 months-18 years.

METHODS

This scoping review was reported based on Preferred Reporting Items for Systematic reviews and Meta-Analyses-extension for Scoping Reviews guidelines. A systematic search identified records from 4 databases: PubMed, Embase, Cochrane Library, and Web of Science. Abstracts received 3 blind reviews. Corresponding full-text articles rated as "in-scope" and reporting data not published in any other retained article (i.e., no double reporting) were identified and assigned to 5 thematic evaluating teams. Full-text articles were reviewed using a double-blind standardized form. Level of evidence was graded, and summative statements were generated.

RESULTS

On November 9, 2022, 2,167 documents had been identified; 132 articles were retained, of which 33 (25%) were published over the past 5 years. Overall, 2,161 individuals met the inclusion criteria; female patients were 527 of 1,554 (33.9%) cases included, whose sex was identifiable. Of 132 articles, 57 (43.2%) were single case reports and only 5 (3.8%) clinical trials; the level of evidence was prevalently low (80/132; 60.6%). Most studies included neurobehavioral measures (84/127; 66.1%) and neuroimaging (81/127; 63.8%); 59 (46.5%) were mainly related to diagnosis, 56 (44.1%) to prognosis, and 44 (34.6%) to treatment. Most frequently used neurobehavioral tools included the Coma Recovery Scale-Revised, Coma/Near-Coma Scale, Level of Cognitive Functioning Assessment Scale, and Post-Acute Level of Consciousness scale. EEG, event-related potentials, structural CT, and MRI were the most frequently used instrumental techniques. In 29/53 (54.7%) cases, DoC improvement was observed, which was associated with treatment with amantadine.

DISCUSSION

The literature on pediatric DoCs is mainly observational, and clinical details are either inconsistently presented or absent. Conclusions drawn from many studies convey insubstantial evidence and have limited validity and low potential for translation in clinical practice. Despite these limitations, our work summarizes the extant literature and constitutes a base for future guidelines related to the diagnosis, prognosis, and treatment of pediatric DoC.

Drowning in Children: Retrospective Analysis of Incident Characteristics, Predicting Parameters, and Long-Term Outcome

BACKGROUND

Drowning is the second leading cause of unnatural death in childhood worldwide. More than half of the drowned children, who were in need of cardiopulmonary resuscitation (CPR) at the scene suffered from lifelong neurological sequelae. There are few data about prognostic predictors in the pediatric population of drowning victims. The objective of the study was to assess incident characteristics, prognostic parameters, and long-term outcome of children recovering from a drowning incident.

METHODS

We carried out a retrospective analysis of data of the cohort of pediatric cases (age 0-18) of drowning victims admitted in the years 2000-2015 to the emergency room/intensive care unit/pediatric ward at the University Children's Hospital of Zurich, Switzerland. Outcome was classified by the Pediatric Cerebral Performance Category Scale (PCPCS). New subcategories of severity for known prognostic parameters have been defined. A correlation analysis was performed between the subcategories of the prognostic parameters and the PCPCS.

RESULTS

A total of 80 patients were included in the analysis. Of these, 64% were male, most of the patients were at the age of 0-5 years. More than 80% of the patients were unattended at a public or private pool when the drowning incident happened. In all, 61% (n = 49) needed cardiopulmonary resuscitation (CPR). Of the resuscitated children, 63% showed good to mildly impaired long-term outcome (PCPCS 1-3). Furthermore, 15% (n = 12) were transferred to rehabilitation. Seven children died during the hospital stay and another four died due to complications in the ten years following the incident. The newly defined subcategories of the parameter submersion time, Glasgow Coma Scale (GCS) at time of admission, body temperature at time of admission, blood pH, blood glucose, and blood lactate level correlated significantly with the PCPCS.

CONCLUSIONS

Supervision of children, especially boys of the age 0-5 years, next to public or private pools is most important for prevention of drowning incidents in Switzerland. Cardiopulmonary resuscitation done by trained staff leads to a better long-term outcome. Medical decision making in severe cases of drowning should consider submersion time, GCS at time of admission, body temperature at time of admission, blood pH, blood glucose, and blood lactate levels, as these parameters correlate with long-term outcome.

Outcome Rating Scales for Pediatric Head Injury

Intensivists, surgeons, neurologists, and others involved in pediatric intensive care units (PICUs) have an important investment in both short-and long-term outcomes of children and adolescents with head injury who are treated under their care. Outcomes are most often documented by either single-or multiple-item rating scales and are implemented both during and after hospital care. For this review, the authors have organized the content of rating scales into 6 general classes: (1) mortality prediction, (2) severity, (3) global recovery, (4) activity restrictions, (5) secondary adverse conditions, and (6) limitations in participation, quality of life, and health status. Rating scales that describe the outcomes of children and adolescents after head injury are used to monitor medical and functional recovery, guide clinical management, drive quality assurance initiatives, and conduct clinical research. The authors restrict their selective review to rating scales that describe child outcomes (vs family) and that have been reported and applied in the outcome literature. Although head injury is a major cause of mortality and short-and long-term morbidity in children and adolescents, there is no consensus on which rating scales are optimal for hospital care or community follow-up. Major considerations for clinical use are feasibility, type of outcome information needed, content breadth across multiple ages and levels of recovery, and utility in determining the short-term impact of PICU care on long-term outcome.

Children and young adults in a prolonged unconscious state after severe brain injury: long-term functional outcome as measured by the DRS and the GOSE after early intensive neurorehabilitation

OBJECTIVE

To investigate the long-term (2-15 years) functional outcome of children and young adults who received an early intensive neurorehabilitation programme (EINP) after a prolonged period of unconsciousness due to severe brain injury; to differentiate between traumatic brain injury (TBI) and non-traumatic brain injury (nTBI); and to compare the results on two different outcome scales: the Disability Rating Scale (DRS) and the Glasgow Outcome Scale Extended (GOSE).

SUBJECTS

One hundred and forty-five patients, who were admitted to EINP between December 1987 and January 2001.

OUTCOME MEASURES

The Post-Acute Level of Consciousness scale (PALOC-s), the DRS, including categorized scores (DRScat), and the GOSE.

RESULTS

The long-term functional level of 90 patients could be determined, of whom 25 were deceased. The mean DRS-score of the surviving patients was 6.8 (SD = 6.6); the mean score on the GOSE was 4.5 (SD = 1.7). There was a significant difference in the outcome amongst traumatic and non-traumatic patients (t88 = 4.21; p < 0.01). The correlation between the DRS and the GOSE was high (Spearman rho = 0.85; p < 0.01), as well as the correlation between the categorized scores of the DRS and the GOSE (Spearman rho = 0.81; p < 0.01). The distribution of outcome scores on the DRScat is more diverse than on the GOSE. Especially item 7 of the DRS, measuring functional independence, showed considerable variance in discriminating between different outcome levels.

CONCLUSIONS

More patients with TBI than expected reached a (semi-) independent level of functioning, indicating a possible effect of EINP. Patients suffering from nTBI did not demonstrate these outcome levels. Only a few patients stayed in a vegetative state for more than a couple of years. In this cohort of severe brain-injured young people, the DRS offered the best investigative possibilities for long-term level of functioning.

Guidelines for Quality Management of Apallic Syndrome / Vegetative State

INTRODUCTION

Epidemiology in Europe shows constantly increasing figures for the apallic syndrome (AS)/vegetative state (VS) as a consequence of advanced rescue, emergency services, intensive care treatment after acute brain damage and high-standard activating home nursing for completely dependent end-stage cases secondary to progressive neurological disease. Management of patients in irreversible permanent AS/VS has been the subject of sustained scientific and moral-legal debate over the past decade.

METHODS

A task force on guidelines for quality management of AS/VS was set up under the auspices of the Scientific Panel Neurotraumatology of the European Federation of Neurological Societies to address key issues relating to AS/VS prevalence and quality management. Collection and analysis of scientific data on class II (III) evidence from the literature and recommendations based on the best practice as resulting from the task force members' expertise are in accordance with EFNS Guidance regulations.

FINDINGS

The overall incidence of new AS/VS full stage cases all etiology is 0.5-2/100.000 population per year. About one third are traumatic and two thirds non traumatic cases. Increasing figures for hypoxic brain damage and progressive neurological disease have been noticed. The main conceptual criticism is based on the assessment and diagnosis of all different AS/VS stages based solely on behavioural findings without knowing the exact or uniform pathogenesis or neuropathological findings and the uncertainty of clinical assessment due to varying inclusion criteria. No special diagnostics, no specific medical management can be recommended for class II or III AS treatment and rehabilitation. This is why sine qua non diagnostics of the clinical features and appropriate treatment of AS/VS patients of "AS full, remission, defect and end stages" require further professional training and expertise for doctors and rehabilitation personnel.

INTERPRETATION

Management of AS aims at the social reintegration of patients or has to guarantee humanistic active nursing if treatment fails. Outcome depends on the cause and duration of AS/VS as well as patient's age. There is no single AS/VS specific laboratory investigation, no specific regimen or stimulating intervention to be recommended for improving higher cerebral functioning. Quality management requires at least 3 years of advanced training and permanent education to gain approval of qualification for AS/VS treatment and expertise. Sine qua non areas covering AS/VS institutions for early and long-term rehabilitation are required on a population base (prevalence of 2/100.000/year) to quicken functional restoration and to prevent or treat complications. Caring homes are needed for respectful humane nursing including basal sensor-motor stimulating techniques. Passive euthanasia is considered an act of mercy by physicians in terms of withholding treatment; however, ethical and legal issues with regard to withdrawal of nutrition and hydration and end of life discussions raise deep concerns. The aim of the guideline is to provide management guidance (on the best medical evidence class II and III or task force expertise) for neurologists, neurosurgeons, other physicians working with AS/VS patients, neurorehabilitation personnel, patients, next-of-kin, and health authorities.

Follow-up of neuropsychological function recovery in a 9-year-old girl with anoxic encephalopathy: a window on the brain re-organization processes

OBJECTIVE

To investigate comprehensive neuropsychological outcome, disabilities in daily life and individual recovery processes in a case of anoxic encephalopathy.

DESIGN

A 9-year-old child's functional outcome after anoxic coma was evaluated in a follow-up study with assessments at 5, 9 and 12 months post-injury. A comprehensive neuropsychological protocol was administered. Qualitative methods of analysis and ecological observation were associated with standard and non-standard quantitative measures.

RESULTS

The child presented pervasive functional deficits with prevalence of gnosic, praxic and self-regulatory dysfunction. Dissociated functional recovery was documented in 12 months time. Improvement of self-regulatory abilities was likely a 'propeller' of global system re-organization.

CONCLUSION

A descriptive longitudinal study of functional and ecological behavioural changes after anoxic coma provides insight into the re-adaptation processes in the brain connected to post-lesion ecological and training experiences. Contextual factors and their relations to functional improvements deserve further study.

Recovery of consciousness and life expectancy of children in a vegetative state

The vegetative state does occur in children and is most commonly due to acquired traumatic and non-traumatic injuries. However, neurometabolic and degenerative diseases, as well as certain developmental brain malformations such as anencephaly, can also cause this condition. There are limited data available in children concerning recovery of consciousness and function from the vegetative state as well as life expectancy. This review concentrates on these issues and is based primarily on the data published in the Multi-Society Task Force Report on PVS which was published in 1994 as well as other epidemiological studies. Children in a vegetative state do have a poor prognosis for recovery of consciousness and function and do have a shortened life expectancy. Further research is needed to better understand what variables might contribute to recovery and what therapies might be of benefit.

Lower extremity spasticity as an early marker of ambulatory recovery following traumatic brain injury

METHODS

A consecutive series of 107 children and young persons with traumatic brain injury (TBI) admitted to a hospital-based inpatient rehabilitation program was assessed to determine whether lower extremity spasticity could be utilized as an early clinical marker for recovery of ambulation. Presence of spasticity was determined by clinical examination at admission, and the ability to ambulate safely indoors (15.24 m) was evaluated at discharge. Sensitivity, specificity and positive and negative predictive values for spasticity were calculated.

RESULTS

Lower extremity spasticity is a sensitive (71.4%) and specific (81.5%) predictor of the inability to ambulate at discharge. The absence of lower extremity spasticity, however, was a better predictor of ambulation recovery than the presence of spasticity was a predictor of nonambulatory status at hospital discharge.

DISCUSSION

Implications for spasticity assessment and prognosis in terms of ambulation and recovery are discussed.

Functional recovery in pediatric traumatic brain injury during inpatient rehabilitation

OBJECTIVE

To examine changes in functional status of children with traumatic brain injury by identifying the pattern and amount of change between and within the domains of self-care, mobility, and social function during inpatient rehabilitation and to examine the relationships of age and injury severity to functional recovery.

DESIGN

Retrospective descriptive study. Seventy-nine children and adolescents with traumatic brain injury were assessed at inpatient rehabilitation hospital admission and discharge by using the Pediatric Evaluation of Disability Inventory's (PEDI) functional skills and caregiver assistance domains of self-care, mobility, and social function.

RESULTS

Admission self-care functional levels were significantly greater than mobility and social function for both PEDI scales. At discharge, significant improvement was noted within all three domains and the amount of change between domains was significantly greater for the mobility domain on both scales. Age was not related to the amount of recovery. Admission functional status was moderately negatively correlated to the change in PEDI scores (ranging from r = -0.432 to -0.681).

CONCLUSIONS

Variations exist in the recovery of self-care, mobility, and social function capability and independence during inpatient rehabilitation. Self-care was the least affected. Participants showed significant improvement in all domains, with the most recovery in mobility. Children with greater functional deficits demonstrated greater functional gains.

Life expectancy and median survival time in the permanent vegetative state

The authors studied life expectancy and risk factors for mortality of persons in the vegetative state (VS). The study participants were 1,021 California patients in the VS during 1981-1996. Because of the large sample size, the authors were able to use multivariate methods to assess the effect of several risk factors on mortality. The authors found a strong secular trend in infant mortality, with rates in the mid-1990s being only one third of those in the early 1980s (P < 0.01). A smaller secular trend was observed for children aged 2-10 years and none for older patients. The mortality risk for older patients fell by approximately 8% for each year since the onset of the VS. The need for gastrostomy feeding was associated with a substantially higher risk, especially for infants and older patients (P < 0.01). Ventilator dependence also appeared to be a risk factor. On the basis of recent mortality rates, life expectancy in the VS is frequently higher than has generally been thought. For example, it is 10.5 additional years (+/- 2 years) for a 15-year-old patient who has been in the VS for 1 year, and 12.2 years for a 15-year-old patient who has been in the VS for 4 years.

Prognosis in the intensive care unit: finding accurate and useful estimates for counseling patients

OBJECTIVES

Counseling critically ill patients and their families about what the future is likely to hold requires accurate prognostic information. Our goal is to teach clinicians how to find and critically appraise prognostic studies that examine homogeneous populations. CLINICAL EXAMPLE: An article describing the outcomes of a group of children who are in a prolonged, persistent vegetative state.

RECOMMENDATIONS

The validity of prognostic studies is increased when: a) the sample of patients is representative; b) patients are homogeneous with respect to prognostic risk; c) follow-up is sufficient to minimize the possibility that the missing patients could alter the interpretation of the results; and d) health outcomes are evaluated, using objective and unbiased criteria. The likelihood of these outcomes over time and the precision around these probability estimates should be easily understandable. Before using the results of these studies to counsel patients and families, practitioners should ensure that the patients in the study and their management are similar to the patient in question, and that follow-up of the subjects is sufficiently long.

CONCLUSIONS

The criteria outlined in this article may assist clinicians in interpreting articles describing the prognosis of patients with similar clinical conditions.

Late improvements in mobility after acquired brain injuries in children

The purpose of this investigation was to describe the late improvements in functional mobility in children who have sustained severe acquired anoxic or traumatic brain injuries. Ninety-eight children from a consecutive series of 199 with acquired brain injuries met inclusion criteria. As expected, children with traumatic injuries had better mobility at time of discharge from rehabilitation than did children with anoxic injury. In addition, children with traumatic injuries improved more in mobility status during the first 2 years after injury than did children with anoxic injury. The children who continued to improve in mobility after discharge were unconscious for a shorter time. Children who became community ambulators during the first year after discharge had higher mobility ratings at discharge. Although children who eventually achieved more functional mobility were admitted to rehabilitation service sooner after injury, discriminant analysis revealed that the duration of unconsciousness, and therefore severity of injury, was more closely correlated with the final mobility status.

Ethical issues in the pediatric intensive care unit

Advanced technology and better scientific understanding of mechanisms of disease now permit intensive care personnel to extend life beyond what some patients and families consider reasonable, leading, in part, to the "patients' rights" movement and the articulation of legal and moral guidelines for foregoing life support. In the case of pediatrics, commentaries on a few of the topics that have arisen most frequently or have provided the greatest challenge in the authors' experience are provided.

Outcome of severe anoxic/ischemic brain injury in children

The outcome of 25 children who had anoxic or ischemic brain injuries at 2 months to 14 years of age is reported. Follow-up was from 1 to 14 years after injury; causes were near-drowning, 11; suffocation, 7; cardiac arrest, 3; electrocution with cardiac arrest, 2; strangulation, 1; aborted sudden infant death syndrome, 1. All patients were unconscious for at least 24 hours. Of 11 remaining in vegetative states, 5 died. Seven children regained some language skills and are in special education or self-contained classrooms. Seven are profoundly impaired and show only a social smile. Cognitive and motor outcomes were correlated with the severity of injury as indicated by the duration of unconsciousness. All children who regained language skills or the ability to walk were unconscious less than 60 days. Dystonic rigidity was observed in all children who were nonambulatory. Outcome was also correlated with the cause of injury; mortality, cognitive outcome, feeding outcome, and duration of unconsciousness were all worse in children with near-drowning.