Publications by authors named "Clemence Marois"

Probing cognition and consciousness in the absence of functional communication remains an extremely challenging task. In this perspective, we imagined a basic clinical procedure to explore pain anticipation at bedside. In a series of 61 patients with a disorder of consciousness, we tested the existence of a nociceptive anticipation response by pairing a somaesthetic stimulation with a noxious stimulation.

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  • - The STROMA-CoV-2 study evaluated the effects of umbilical cord-derived mesenchymal stromal cells (UC-MSCs) on patients with severe respiratory issues from SARS-CoV-2, finding no significant effectiveness despite good safety results after 28 days.
  • - An extended follow-up assessed the long-term safety and health outcomes of UC-MSC administration in the same patient cohort at 6 and 12 months post-hospital discharge, focusing on various health metrics.
  • - Results indicated a favorable safety profile with no significant differences between UC-MSC and placebo groups, although some patients experienced lingering lung issues and declines in quality of life over the year.
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Background: Fungal infections of the central nervous system usually affect immunocompromised patients. Primary myelitis has never been described.

Report: A 45-year-old immunocompetent male with subacute paraplegia was treated for inflammatory myelitis before clinical deterioration requiring mechanical ventilation.

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Pupil dilation response (PDR) has been proposed as a physiological marker of conscious access to a stimulus or its attributes, such as novelty. In a previous study on healthy volunteers, we adapted the auditory "local global" paradigm and showed that violations of global regularity elicited a PDR. Notably without instructions, this global effect was present only in participants who could consciously report violations of global regularities.

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Introduction: Autoimmune encephalitis (AE) diagnosis and follow-up remain challenging. Brain F-fluoro-deoxy-glucose positron emission tomography (FDG PET) has shown promising results in AE. Our aim was to investigate FDG PET alterations in AE, according to antibody subtype.

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This study aimed at probing covert language processing in patients with disorders of consciousness. An auditory paradigm contrasting words to pronounceable pseudowords was designed, while recording bedside electroencephalogram and computing the two main correlates of lexicality: N400 and late positive component (LPC). Healthy volunteers and 19 patients, 10 in a minimally conscious state and 9 in a vegetative state (also coined unresponsive wakefulness syndrome), were recorded.

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Background: Disorders of consciousness due to severe hypoglycemia are rare but challenging to treat. The aim of this retrospective cohort study was to describe our multimodal neurological assessment of patients with hypoglycemic encephalopathy hospitalized in the intensive care unit and their neurological outcomes.

Methods: Consecutive patients with disorders of consciousness related to hypoglycemia admitted for neuroprognostication from 2010 to 2020 were included.

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Unlabelled: Studies comparing outcomes of ICU patients admitted for either COVID-19 or seasonal influenza are limited. Our objective was to describe baseline clinical profiles, care procedures, and mortality outcomes by infection status (influenza vs COVID-19) of patients who received invasive mechanical ventilation in the ICU.

Design: Retrospective observational study.

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  • Predicting the outcomes for patients with status epilepticus (SE) in intensive care is complicated, and the study aims to identify short- and long-term prognostic factors.
  • Researchers analyzed 51 clinical, demographic, and biochemical markers to create models for assessing patient outcomes, comparing new models with existing scales like STESS and mSTESS.
  • The study found that specific clinical markers strongly correlated with patient worsening and mortality, showing that their new models significantly outperformed previous ones in predicting outcomes, and suggested implementing these models into electronic devices for improved clinical use.
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With the COVID-19 pandemic, documenting whether health care workers (HCWs) are at increased risk of SARS-CoV-2 contamination and identifying risk factors is of major concern. In this multicenter prospective cohort study, HCWs from frontline departments were included in March and April 2020 and followed for 3 months. SARS-CoV-2 serology was performed at month 0 (M0), M1, and M3 and RT-PCR in case of symptoms.

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The clinical and fundamental exploration of patients suffering from disorders of consciousness (DoC) is commonly used by researchers both to test some of their key theoretical predictions and to serve as a unique source of empirical knowledge about possible dissociations between consciousness and cognitive and/or neural processes. For instance, the existence of states of vigilance free of any self-reportable subjective experience [e.g.

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  • Status epilepticus (SE) is a serious condition characterized by prolonged seizures, requiring quick diagnosis for effective treatment to avoid neurological damage.
  • In this study, researchers evaluated biomarkers like Neuron Specific Enolase (NSE), S100-beta protein (S100B), and progranulin in a large group of patients to improve SE diagnosis.
  • Results showed that serum S100B levels have good accuracy in detecting SE, suggesting it should be included in clinical assessments alongside other diagnostic methods.
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Background: Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2)-induced acute respiratory distress syndrome (ARDS) causes high mortality. Umbilical cord-derived mesenchymal stromal cells (UC-MSCs) have potentially relevant immune-modulatory properties, whose place in ARDS treatment is not established. This phase 2b trial was undertaken to assess the efficacy of UC-MSCs in patients with SARS-CoV-2-induced ARDS.

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  • - This study aimed to compare the incidence of invasive pulmonary aspergillosis (IPA) in critically ill patients with COVID-19 versus those with influenza, using data from a large European cohort that included over 1,000 patients on mechanical ventilation for pneumonia.
  • - Results showed that the incidence of putative IPA was significantly lower in the COVID-19 group (2.5%) compared to the influenza group (6%), indicating that COVID-19 patients had a reduced risk for this fungal infection.
  • - The study also found that having putative IPA was linked to increased 28-day mortality and longer ICU stays, affirming its severity, but overall the incidence of IPA was low across both patient groups.
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COVID-19 is associated with encephalitis in critically ill patients and endothelial dysfunction seems to contribute to this life-threatening complication. Our objective was to determine the hallmark of endothelial activation in COVID-19-related encephalitis. In an observational study in intensive care unit (ICU), we compared vascular biomarkers of critically ill COVID-19 patients with or without encephalitis.

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  • There is a need for effective biomarkers to monitor EEG activity and seizure risk in patients with acute brain injuries, as seizures can lead to further neurological issues.
  • The study involved 11 patients with refractory status epilepticus, tracking their serum levels of neuron-specific enolase (NSE) and S100-beta alongside EEG activity over several days.
  • Results showed that NSE levels correlated with EEG scores and could predict seizure recurrence, with levels above 17 ng/ml indicating a 71% seizure occurrence and a rise of more than 15% predicting recurrence in 80% of patients.
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Background: Intensive care unit (ICU) healthcare workers (HCWs) are at the forefront of the coronavirus disease 2019 pandemic. To overcome the lack of human resources during this crisis, some ICUs had to mobilise staff from a reinforcement pool, with no or outdated ICU experience. This study aimed to investigate and to compare the psychological impact of the pandemic on regular ICU staff members and reinforcement workers.

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Here we describe the effect of therapeutic plasma exchange with 5% albumin as sole replacement solution for the management of Covid-19. A 74-year-old man was admitted for severe Covid-19 acute respiratory distress syndrome. Based on the growing body of evidence that cytokine release syndrome, and especially interleukin-6, plays a key role in critically ill Covid-19 patients, we decided to implement therapeutic plasma exchange as a rescue therapy.

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Purpose: Acute respiratory failure (ARF) is common and potentially fatal in patients with primary malignant brain tumors (PMBT). However, few data are available regarding its precipitating factors and prognosis. We sought to: (1) compare the causes of ARF and the outcome between patients with PMBT and patients with other peripheral solid tumors (PST), (2) identify the factors influencing ICU survival in PMBT patients.

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