Publications by authors named "Pierre Perez"

Sarcoidosis is an inflammatory disease known to be associated with multiple autoimmune disorders. There is a restricted number of descriptions of the association between sarcoidosis and autoimmune thrombotic thrombocytopenic purpura (aTTP). We present the case of a 63-year-old woman admitted to the hospital to investigate a possible sarcoidosis who had hemolytic anemia and thrombocytopenia, with low ADAMTS13 activity and anti-ADAMTS13 antibodies, leading to a diagnosis of aTTP.

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Purpose: Studies have suggested benefits from magnesium sulphate in thrombotic thrombocytopenic purpura (TTP). We aimed to measure the effects of magnesium sulphate supplementation on TTP recovery.

Methods: In this multicenter, randomised, double-blind, controlled, superiority study, we enrolled adults with a clinical diagnosis of TTP.

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  • The study examines the prevalence and predictors of cerebral lesions in patients with immune thrombotic thrombocytopenic purpura (iTTP) and hemolytic uremic syndrome (HUS) during their acute phases.
  • One-third of the 73 patients analyzed showed acute ischemic lesions on MRI, and neurological symptoms were not significantly different between iTTP and HUS cases.
  • Key factors predicting these lesions included the presence of old infarcts, elevated blood pulse pressure, and a diagnosis of iTTP, indicating potential areas for enhanced treatment approaches.*
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Coagulation disorders increase mortality rate during septic shock, but the impact of concomitant hematological malignancies remains unknown. The study assessed coagulation disorders in onco-hematological patients with thrombocytopenia (<100 G/L) admitted to ICU for septic shock. Among 146 included patients, 50 patients had lymphoma and 49 patients had acute leukemia.

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Background: The prevalence, prognostic role, and diagnostic value of blood pressure in immune-mediated thrombotic thrombocytopenic purpura (iTTP) and other thrombotic microangiopathies (TMAs) remain unclear.

Methods: Using a national cohort of iTTP ( = 368), Shigatoxin-induced hemolytic uremic syndrome ( = 86), atypical hemolytic uremic syndrome ( = 84), and hypertension-related thrombotic microangiopathy ( = 25), we sought to compare the cohort's blood pressure profile to assess its impact on prognosis and diagnostic performances.

Results: Patients with iTTP had lower blood pressure than patients with other TMAs, systolic (130 [interquartile range (IQR) 118-143] vs 161 [IQR 142-180] mmHg) and diastolic (76 [IQR 69-83] vs 92 [IQR 79-105] mmHg, both  < 0.

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Background: Varicella-zoster virus (VZV) is one of the main viruses responsible of acute encephalitis. However, data on the prognosis and neurologic outcome of critically ill patients with VZV encephalitis are limited. We aimed to describe the clinical features of VZV encephalitis in the ICU and to identify factors associated with a favorable neurologic outcome.

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is a sporulating Gram-positive anaerobic rod that is considered to be one of the most fastidious and oxygen-sensitive anaerobes. It is a well-known animal pathogen and the cause of bacillary hemoglobinuria primarily in cattle. To date, human infections caused by have been reported in three patients with malignant underlying diseases.

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  • Sinusoidal obstruction syndrome (SOS) is a dangerous liver problem that can happen after high-dose chemotherapy, and the only approved treatment for it is defibrotide.
  • In a study of 71 patients in tough medical situations due to SOS, many needed help for their breathing and kidneys, and 54% sadly did not survive the hospital stay.
  • Older patients and those needing special machines to help with breathing or kidney function had a higher risk of dying, but using defibrotide for prevention seemed to help some patients do better.
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The anti-von Willebrand factor nanobody caplacizumab was licensed for adults with immune-mediated thrombotic thrombocytopenic purpura (iTTP) based on prospective controlled trials. However, few data are available on postmarketing surveillance. We treated 90 iTTP patients with a compassionate frontline triplet regimen associating therapeutic plasma exchange (TPE), immunosuppression with corticosteroids and rituximab, and caplacizumab.

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  • The IVOIRE study investigated the effects of socioeconomic deprivation on patient outcomes, specifically looking at illness severity upon ICU admission and mortality rates after 3 months.
  • Researchers collected data from 1,294 ICU patients across 8 French hospitals, assessing their socioeconomic status via interviews and a deprivation score (EPICES).
  • Results showed no significant differences in the severity of illness or mortality rates at 3 months between deprived and non-deprived patients, indicating that socioeconomic status does not influence these specific outcomes in the ICU setting.
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Background: The aim of this study was to assess the benefit of direct ICU admission from the emergency department (ED) compared to admission from wards, in patients with hematological malignancies requiring critical care.

Methods: Post hoc analysis derived from a prospective, multicenter cohort study of 1011 critically ill adult patients with hematologic malignancies admitted to 17 ICU in Belgium and France from January 2010 to May 2011. The variable of interest was a direct ICU admission from the ED and the outcome was in-hospital mortality.

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  • Older patients (≥60 years) with immune thrombotic thrombocytopenic purpura (iTTP) show more severe symptoms and longer diagnosis times compared to younger patients (<60 years), including delirium and renal involvement.
  • Short- and mid-term mortality rates are significantly higher in older iTTP patients, and age increases the risk of mortality by 10% for every decade.
  • Long-term, older iTTP survivors face a mortality risk more than three times greater than that of non-iTTP elderly individuals, highlighting the severe impact of age on outcomes.
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Background: Acute respiratory failure is the leading reason for intensive care unit (ICU) admission in immunocompromised patients, and the need for invasive mechanical ventilation has become a major clinical endpoint in randomized controlled trials (RCTs). However, data are lacking on whether intubation is an objective criteria that is used unbiasedly across centers. This study explores how this outcome varies across ICUs.

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Background: Among the severe complications of preeclampsia (PE), acute kidney injury (AKI) is problematic if features of thrombotic microangiopathy (TMA) are present. Although a haemolysis enzyme liver low-platelets syndrome is considerably more frequent, it is vital to rule out a flare of atypical haemolytic and uraemic syndrome (aHUS). Our objective was to improve differential diagnosis procedures in post-partum AKI.

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Background: Although outcomes of critically ill patients with haematological malignancies (HMs) have been fully investigated in terms of organ failure and mortality, data are scarce on health-related quality of life (HRQOL) in this population. We aim to assess post-intensive care unit (ICU) burden and HRQOL of critically ill patients with HMs and to identify risk factors for quality-of-life (QOL) impairment.

Results: In total, 1011 patients with HMs who required ICU admission in 17 ICUs in France and Belgium were included in the study; 278 and 117 patients were evaluated for QOL at 3 months and 1 year, respectively, after ICU discharge.

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Importance: High-flow nasal oxygen therapy is increasingly used for acute hypoxemic respiratory failure (AHRF).

Objective: To determine whether high-flow oxygen therapy decreases mortality among immunocompromised patients with AHRF compared with standard oxygen therapy.

Design, Setting, And Participants: The HIGH randomized clinical trial enrolled 776 adult immunocompromised patients with AHRF (Pao2 <60 mm Hg or Spo2 <90% on room air, or tachypnea >30/min or labored breathing or respiratory distress, and need for oxygen ≥6 L/min) at 32 intensive care units (ICUs) in France between May 19, 2016, and December 31, 2017.

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In patients with hematologic malignancies, respiratory status may deteriorate during neutropenia recovery. This multicenter, observational study aims to evaluate granulocyte colony-stimulating factor (G-CSF) impact on respiratory status in critically ill neutropenic patients. Among 1011 critically ill patients with hematologic malignancies, 288 were neutropenic and included in this study.

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We investigated how the initial ventilation/oxygenation management may influence the need for intubation on the coming day in a cohort of immunocompromised patients with acute hypoxemic respiratory failure (ARF). Data from 847 immunocompromised patients with ARF were used to estimate the probability of intubation at day+1 within the first 3 days of ICU admission, according to oxygenation management. First, noninvasive ventilation (NIV) was compared to oxygen therapy whatever the administration device; then standard oxygen was compared to High Flow Nasal Cannula therapy alone (HFNC), NIV alone or NIV+HFNC.

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Rationale: Noninvasive diagnostic multiplex molecular tests may enable the early identification and treatment of viral infections in critically ill immunocompromised patients.

Objectives: To assess the association between viral detection in nasopharyngeal swabs and ICU mortality in critically ill hematology patients.

Methods: This was a post hoc analysis of a prospective cohort of critically ill hematology patients admitted to 17 ICUs.

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  • * Despite the positive outcomes, about 49% of patients eventually experience a recurrence of severe ADAMTS13 deficiency, although many respond well to additional rituximab treatments.
  • * Long-term follow-up reveals that patients with persistently undetectable ADAMTS13 activity are at a much higher risk for relapse, highlighting the efficacy and favorable risk-benefit ratio of preemptive ritux
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Rationale: The incidence of Pneumocystis jirovecii pneumonia (PjP) is rising. Longer time to treatment is associated with higher mortality.

Objectives: To develop a multivariable risk prediction model for PjP diagnosis.

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Background: Acute respiratory failure (ARF) is the leading reason for intensive care unit (ICU) admission in immunocompromised patients. High-flow nasal oxygen (HFNO) therapy is an alternative to standard oxygen. By providing warmed and humidified gas, HFNO allows the delivery of higher flow rates via nasal cannula devices, with FiO values of nearly 100%.

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Objectives: To assess whether serum concentration of endothelial cell-specific molecule-1 (Endocan) at ICU admission is associated with the use of ICU resources and outcomes in critically ill hematology patients.

Design: Prospective multicenter cohort study.

Setting: Seventeen ICUs in France and Belgium.

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Background: Cardiogenic shock shares with septic shock common hemodynamic features, inflammatory patterns, and most likely similar complications such as critical illness-related corticosteroid insufficiency. The aim of this study was to evaluate the prevalence of critical illness-related corticosteroid insufficiency in cardiogenic shock patients and to secondarily assess its prognostic value on 90-day mortality.

Methods: A single-center prospective observational study conducted over a 3-year period and including all patients with cardiogenic shock.

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