scholarly journals The altered state of consciousness: clinical assessment and monitoring

2011 ◽  
Author(s):  
Maria Grazia Inzaghi ◽  
Matteo Sozzi
Keyword(s):  
Task Force ◽  
Work Group ◽  
Single Case ◽  
Vegetative State ◽  
Persistent Vegetative State ◽  
Minimally Conscious State ◽  
Conscious State ◽  
Consensus Conference ◽  
Future Research ◽  
Disorder Of Consciousness

Aim of this work is to provide an overview on the main clinical issues concerning disorder of consciousness (DOC). After a briefly description of the debate on clinical differences in states of altered consciousness, we report the description of clinical features of the three different levels of DOC: coma, vegetative state, and minimally conscious state, according to the Multi Society Task Force for Persistent Vegetative State (1994) and the Aspen Work Group (Giacino et al., 2002). We will then describe an observation procedure, stated by Whyte and coworkers in 1999, based upon a single-case methodology aimed to assess responsiveness and its variations. At least, we will give a description of the evidences on stimulation treatment efficacy, as we collected in occasion of the last Consensus Conference in Neuropsychological Rehabilitation held in Siena (Italy) in 2010. Our conclusions confirm the lack of evidences concerning the efficacy of treatment for recovery of consciousness in agreement with other authors and we will finally provide suggestions for future research.

Plum and Posner's Diagnosis and Treatment of Stupor and Coma

2019 ◽  
Author(s):  
Jerome B. Posner ◽  
Clifford B. Saper ◽  
Nicholas D. Schiff ◽  
Jan Claassen
Keyword(s):  
Brain Death ◽  
Vegetative State ◽  
Persistent Vegetative State ◽  
Minimally Conscious State ◽  
Conscious State ◽  
Diagnosis And Treatment ◽  
Comprehensive Treatment ◽  
Disorder Of Consciousness ◽  
Disease States ◽  
Minimally Conscious

This text is an update of a classic work on diagnosing the cause of coma, with the addition of new sections on the treatment of comatose patients. The first chapter provides an up-to-date review on the brain mechanisms that maintain a conscious state in humans and how lesions that damage these mechanisms cause loss of consciousness or coma. The second chapter reviews the neurological examination of the comatose patient, which provides the basis for determining whether the patient is suffering from a structural brain injury causing the coma or from a metabolic disorder of consciousness. The third and fourth chapters review the pathophysiology of structural lesions causing coma and the specific disease states that result in coma. Chapter 5 is a comprehensive treatment of the many causes of metabolic coma. Chapter 6 review psychiatric causes of unresponsiveness and how to identify and treat them. Chapters 7 and 8 review the overall emergency treatment of comatose patients, followed by the treatment of specific causes of coma. Chapter 9 examines the long-term outcomes of coma, including the minimally conscious state and the persistent vegetative state, how they can be distinguished, and their implications for eventual useful recovery. Chapter 10 reviews the topic of brain death, the standards for examination of a patient that are required to make the determination of brain death, and the ethics of diagnosis and treatment of patients who, by definition, have no way to approve of or communicate about their wishes.

scholarly journals Practice guideline update recommendations summary: Disorders of consciousness

Neurology ◽  
2018 ◽  
Vol 91 (10) ◽  
pp. 450-460 ◽  
Author(s):  
Joseph T. Giacino ◽  
Douglas I. Katz ◽  
Nicholas D. Schiff ◽  
John Whyte ◽  
Eric J. Ashman ◽  
...  
Keyword(s):  
Vegetative State ◽  
Persistent Vegetative State ◽  
Minimally Conscious State ◽  
Conscious State ◽  
Case Definition ◽  
Disorders Of Consciousness ◽  
Family Counseling ◽  
Delphi Consensus ◽  
Post Injury ◽  
Term Care

ObjectiveTo update the 1995 American Academy of Neurology (AAN) practice parameter on persistent vegetative state and the 2002 case definition on minimally conscious state (MCS) and provide care recommendations for patients with prolonged disorders of consciousness (DoC).MethodsRecommendations were based on systematic review evidence, related evidence, care principles, and inferences using a modified Delphi consensus process according to the AAN 2011 process manual, as amended.RecommendationsClinicians should identify and treat confounding conditions, optimize arousal, and perform serial standardized assessments to improve diagnostic accuracy in adults and children with prolonged DoC (Level B). Clinicians should counsel families that for adults, MCS (vs vegetative state [VS]/unresponsive wakefulness syndrome [UWS]) and traumatic (vs nontraumatic) etiology are associated with more favorable outcomes (Level B). When prognosis is poor, long-term care must be discussed (Level A), acknowledging that prognosis is not universally poor (Level B). Structural MRI, SPECT, and the Coma Recovery Scale–Revised can assist prognostication in adults (Level B); no tests are shown to improve prognostic accuracy in children. Pain always should be assessed and treated (Level B) and evidence supporting treatment approaches discussed (Level B). Clinicians should prescribe amantadine (100–200 mg bid) for adults with traumatic VS/UWS or MCS (4–16 weeks post injury) to hasten functional recovery and reduce disability early in recovery (Level B). Family counseling concerning children should acknowledge that natural history of recovery, prognosis, and treatment are not established (Level B). Recent evidence indicates that the term chronic VS/UWS should replace permanent VS, with duration specified (Level B). Additional recommendations are included.

scholarly journals Dissecting the coma spectrum using Bayesian classification

2019 ◽  
Author(s):  
Martin J. Dietz ◽  
Bochra Zareini ◽  
Risto Näätänen ◽  
Morten Overgaard
Keyword(s):  
Vegetative State ◽  
Minimally Conscious State ◽  
Conscious State ◽  
Small Sample ◽  
Control Group ◽  
Disorder Of Consciousness ◽  
Clinical Disorder ◽  
Electrophysiological Responses ◽  
Alternative Hypotheses ◽  
Minimally Conscious

AbstractA patient who does not regain full consciousness after coma is typically classified as being in a vegetative state or a minimally conscious state. While the key determinants in this differential diagnosis are inferred uniquely from the observed behaviour of the patient, nothing can, in principle, be known about the patient’s awareness of the external world. Given the subjective nature of current diagnostic practice, the quest for neurophysiological markers that could complement the nosology of the coma spectrum is becoming more and more acute. We here present a method for the classification of patients based on electrophysiological responses using Bayesian model selection. We validate the method in a sample of fourteen patients with a clinical disorder of consciousness (DoC) and a control group of fifteen healthy adults. By formally comparing a set of alternative hypotheses about the nosology of DoC patients, the results of our validation study show that we can disambiguate between alternative models of how patients are classified. Although limited to this small sample of patients, this allowed us to assert that there is no evidence of subgroups when looking at the MMN response in this sample of patients. We believe that the methods presented in this article are an important contribution to testing alternative hypotheses about how patients are grouped at both the group and single-patient level and propose that electrophysiological responses, recorded invasively or non-invasively, may be informative for the nosology of the coma spectrum on a par with behavioural diagnosis.

scholarly journals Selegiline in Patients With Disorder of Consciousness: An Open Pilot Study

2018 ◽  
Vol 45 (6) ◽  
pp. 688-691
Author(s):  
Orsola Masotta ◽  
Luigi Trojano ◽  
Vincenzo Loreto ◽  
Pasquale Moretta ◽  
Anna Estraneo
Keyword(s):  
Vegetative State ◽  
Minimally Conscious State ◽  
Conscious State ◽  
Clinical Effects ◽  
Disorder Of Consciousness ◽  
Brain Injured ◽  
Minimally Conscious ◽  
Injured Patients ◽  
Open Pilot

AbstractThis open study investigated the clinical effects of 10-week selegiline administration in six patients in vegetative state and in four patients in a minimally conscious state, at least 6 months after onset. Clinical outcome was assessed by Coma Recovery Scale-Revised once a week during selegiline administration and 1 month later. Three patients stopped treatment because of possible side effects. After treatment and at 1 month of follow-up, four patients showed improvements in clinical diagnosis, and three patients showed an increase in arousal level only. Selegiline might represent a relatively safe option to enhance arousal and promote recovery in brain-injured patients with disorders of consciousness.

scholarly journals Results of a prospective study (CATS) on the effects of thalamic stimulation in minimally conscious and vegetative state patients

2016 ◽  
Vol 125 (4) ◽  
pp. 972-981 ◽  
Author(s):  
Lorenzo Magrassi ◽  
Giorgio Maggioni ◽  
Caterina Pistarini ◽  
Carol Di Perri ◽  
Stefano Bastianello ◽  
...  
Keyword(s):  
Vegetative State ◽  
Minimally Conscious State ◽  
Conscious State ◽  
Cortical Activation ◽  
Disorder Of Consciousness ◽  
Chronic Stimulation ◽  
Thalamic Stimulation ◽  
Minimally Conscious ◽  
Deep Brain ◽  
Stimulation Of

OBJECTIVE Deep brain stimulation of the thalamus was introduced more than 40 years ago with the objective of improving the performance and attention of patients in a vegetative or minimally conscious state. Here, the authors report the results of the Cortical Activation by Thalamic Stimulation (CATS) study, a prospective multiinstitutional study on the effects of bilateral chronic stimulation of the anterior intralaminar thalamic nuclei and adjacent paralaminar regions in patients affected by a disorder of consciousness. METHODS The authors evaluated the clinical and radiological data of 29 patients in a vegetative state (unresponsive wakefulness syndrome) and 11 in a minimally conscious state that lasted for more than 6 months. Of these patients, 5 were selected for bilateral stereotactic implantation of deep brain stimulating electrodes into their thalamus. A definitive consensus for surgery was obtained for 3 of the selected patients. All 3 patients (2 in a vegetative state and 1 in a minimally conscious state) underwent implantation of bilateral thalamic electrodes and submitted to chronic stimulation for a minimum of 18 months and a maximum of 48 months. RESULTS In each case, there was an increase in desynchronization and the power spectrum of electroencephalograms, and improvement in the Coma Recovery Scale–Revised scores was found. Furthermore, the severity of limb spasticity and the number and severity of pathological movements were reduced. However, none of these patients returned to a fully conscious state. CONCLUSIONS Despite the limited number of patients studied, the authors confirmed that bilateral thalamic stimulation can improve the clinical status of patients affected by a disorder of consciousness, even though this stimulation did not induce persistent, clinically evident conscious behavior in the patients. Clinical trial registration no.: NCT01027572 (ClinicalTrials.gov)

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