Publications by authors named "Cheyron D"

Article Synopsis
  • The study investigates how bacteria adapt to patients over long hospital stays, focusing on antimicrobial resistance and metabolic changes in the gut during intensive care unit (ICU) admissions.
  • Weekly rectal swabs from ICU patients were analyzed to track the evolution of enteric bacterial populations, revealing that only a small number of patients harbored distinct strains.
  • Key findings included a persistent strain that exhibited significant changes in drug resistance, highlighting the impact of genetic mutations on bacterial behavior and patient treatment challenges.
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Background: Determining which patients with ARDS are most likely to benefit from lung recruitment maneuvers is challenging for physicians. The aim of this study was to assess whether the single-breath simplified decremental PEEP maneuver, which evaluates potential lung recruitment, may predict a subject's response to lung recruitment maneuvers, followed by PEEP titration.

Methods: We conducted a pilot prospective single-center cohort study with a 3-step protocol that defined sequential measurements.

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Background: Pain management is an essential and complex issue for non-communicative patients undergoing sedation in the intensive care unit (ICU). The Behavioral Pain Scale (BPS), although not perfect for assessing behavioral pain, is the gold standard based partly on clinical facial expression. , an automatic pain assessment tool based on facial expressions in critically ill patients, is a much-needed innovative medical device.

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The aim of this study was to evaluate the proportion of resistance to a temocillin, tigecycline, ciprofloxacin, and chloramphenicol phenotype called t2c2 that resulted from mutations within the locus among extended-spectrum β-lactamases (ESBL-E) isolated in three intensive care units for 3 years in a French university hospital. Two parallel approaches were performed on all 443 ESBL-E included: (i) the minimal inhibitory concentrations of temocillin, tigecycline, ciprofloxacin, and chloramphenicol were determined and (ii) the genomes obtained from the Illumina sequencing platform were analyzed to determine multilocus sequence types, resistomes, and diversity of several -associated genes including operon. Among the 443 ESBL-E strains included, isolates of ( = 194), ( = 122), and complex () ( = 127) were found.

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Background: Due to aging population and increasing part of immunocompromised patients, a raise in life-threatening organ damage related to VZV can be expected. Two retrospective studies were already conducted on VZV in ICU but focused on specific organ injury. Patients with high-risk of VZV disease still must be identified.

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Background: Chimeric antigen receptor T cells are a promising new immunotherapy for haematological malignancies. Six CAR-T cells products are currently available for adult patients with refractory or relapsed high-grade B cell malignancies, but they are associated with severe life-threatening toxicities and side effects that may require admission to ICU.

Objective: The aim of this short pragmatic review is to synthesize for intensivists the knowledge on CAR-T cell therapy with emphasis on CAR-T cell-induced toxicities and ICU management of complications according to international recommendations, outcomes and future issues.

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Background: Immunization against the Yellow fever virus (YFV) with the 17D live-attenuated vaccine is the most effective way to prevent the disease. However, unexpected severe adverse events can occur. They consist in a neurological impairment - neurological disease (YEL-AND), a YF-like illness - viscerotropic disease (YEL-AVD) or anaphylaxis.

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Background: The anatomic site for central venous catheter insertion influences the risk of central venous catheter-related intravascular complications. We developed and validated a predictive score of required catheter dwell time to identify critically ill patients at higher risk of intravascular complications.

Methods: We retrospectively conducted a cohort study from three multicenter randomized controlled trials enrolling consecutive patients requiring central venous catheterization.

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Article Synopsis
  • Ventilator-associated pneumonia (VAP) frequently affects patients with severe COVID-19 who are on mechanical ventilation, prompting this study to examine how corticosteroids might influence VAP risk.
  • A multicenter study analyzed data from 545 patients in 36 ICUs to determine if corticosteroid use impacted VAP incidence, finding that the relationship varied after 48 hours of mechanical ventilation.
  • Overall, no significant link was established between corticosteroid treatment and VAP, though the effect seemed to shift over time during the ICU stay.
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Background: In patients with septic shock, the impact of the mean arterial pressure (MAP) target on the course of mottling remains uncertain. In this post hoc analysis of the SEPSISPAM trial, we investigated whether a low-MAP (65 to 70 mmHg) or a high-MAP target (80 to 85 mmHg) would affect the course of mottling and arterial lactate in patients with septic shock.

Methods: The presence of mottling was assessed every 2 h from 2 h after inclusion to catecholamine weaning.

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Background: The majority of central venous catheters (CVC) removed in the ICU are not colonized, including when a catheter-related infection (CRI) is suspected. We developed and validated a predictive score to reduce unnecessary CVC removal.

Methods: We conducted a retrospective cohort study from five multicenter randomized controlled trials with systematic catheter-tip culture of consecutive CVCs.

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Article Synopsis
  • - 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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Background: The frequency of acute kidney injury (AKI) can be as high as 50% in the intensive care unit (ICU). Despite the publication of national guidelines in France in 2015 for the use of RRT, there are no data describing the implementation of these recommendations in real-life.

Methods: We performed a nationwide survey of practices from November 15, 2019, to January 24, 2020, in France.

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The level of evidence of expert recommendations for starting extracorporeal cardiopulmonary resuscitation (ECPR) in refractory out-of-hospital cardiac arrest (OHCA) and in-hospital cardiac arrest (IHCA) is low. Therefore, we reported our experience in the field to identify factors associated with hospital mortality. We conducted a retrospective cohort study of all consecutive patients treated with ECPR for refractory cardiac arrest without return to spontaneous circulation, regardless of cause, at the Caen University Hospital.

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Article Synopsis
  • Early empirical antimicrobial treatment is common for critically ill COVID-19 patients, and this study looked at how often bacteria were identified in patients with SARS-CoV-2 pneumonia versus those with influenza pneumonia.
  • In a study involving 1,050 patients across 36 ICUs, only 9.7% of SARS-CoV-2 patients had bacterial infections identified within the first 48 hours after intubation compared to 33.6% in influenza patients.
  • Coinfections in both groups were primarily caused by gram-positive cocci, and while bacterial identification increased the risk of 28-day mortality for SARS-CoV-2 patients, the overall impact on mortality was similar for both conditions.
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Background: Patients with SARS-CoV-2 infection are at higher risk for ventilator-associated pneumonia (VAP). No study has evaluated the relationship between VAP and mortality in this population, or compared this relationship between SARS-CoV-2 patients and other populations. The main objective of our study was to determine the relationship between VAP and mortality in SARS-CoV-2 patients.

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Background: Hemorrhagic events remain a major concern in patients under extracorporeal membrane oxygenation (ECMO) support. We tested the association between anticoagulation levels and hemorrhagic events under ECMO using anti-Xa activity monitoring.

Methods: We performed a retrospective multicenter cohort study in three ECMO centers.

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Article Synopsis
  • This study analyzed the effectiveness of procalcitonin (PCT) levels in differentiating between bacterial and nonbacterial infections in patients with severe exacerbations of COPD admitted to the ICU.
  • Results showed that PCT levels were significantly higher in patients with bacterial infections compared to those without documented pathogens, but the overall accuracy of PCT for predicting bacterial infections was low (c-index around 0.64).
  • The conclusion indicates that, although higher PCT levels were observed in bacterial cases, the test's ability to accurately distinguish between infection types is limited.
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Objectives: Individualizing a target mean arterial pressure is challenging during the initial resuscitation of patients with septic shock. The Sepsis and Mean Arterial Pressure (SEPSISPAM) trial suggested that targeting high mean arterial pressure might reduce the occurrence of acute kidney injury among those included patients with a past history of chronic hypertension. We investigated whether the class of antihypertensive medications used before the ICU stay in chronic hypertensive patients was associated with the severity of acute kidney injury occurring after inclusion, according to mean arterial pressure target.

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Background: Right ventricular (RV) failure is a common complication in moderate-to-severe acute respiratory distress syndrome (ARDS). RV failure is exacerbated by hypercapnic acidosis and overdistension induced by mechanical ventilation. Veno-venous extracorporeal CO removal (ECCOR) might allow ultraprotective ventilation with lower tidal volume (V) and plateau pressure (P).

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Background: With recent advances in technology, patients with acute respiratory distress syndrome (ARDS) and severe acute exacerbations of chronic obstructive pulmonary disease (ae-COPD) could benefit from extracorporeal CO removal (ECCOR). However, current evidence in these indications is limited. A European ECCOR Expert Round Table Meeting was convened to further explore the potential for this treatment approach.

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Background: Evaluation of the inferior vena cava (IVC) is not always possible through the subcostal (SC) window.

Methods: Inferior vena cava diameters measured by transhepatic (TH) and SC views were compared by Bland and Altman analysis.

Results: 131 patients were enrolled, including 88 (67%) under mechanical ventilation.

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