Efficacy of the Alpha 2 Agonist Dexmedetomidine for Sympathetic Deactivation in REfractory Septic Shock (ADRESS)
Efficacy of the Alpha 2 Agonist Dexmedetomidine for Sympathetic Deactivation in REfractory Septic Shock: a Randomized, Controlled Trial
Septic shock is one of the most frequent reasons for admission to intensive care units and remains associated with a high mortality rate of approximatively 40% at 28 days. Nearly half of deaths attributable to septic shock occur within the first 3 days and are directly related to the consequences of circulatory failure leading to multiple organ dysfunction. In some patients, persistent shock despite adequate resuscitation leads to early death. This condition is referred to as refractory septic shock. Although its pathophysiology if multifactorial, refractory septic shock is largely characterized by profound vasoplegia and reduced responsiveness to vasopressor therapy.
Current guidelines recommend norepinephrine as the first-line vasopressor. Vasopressin may be considered as a second-line agent, although the addition of vasopressin to norepinephrine has not consistently demonstrated a survival benefit compared with norepinephrine alone. Corticosteroids are also recommended in patients with refractory septic shock with a low level of evidence. Similarly, the addition of other vasopressors such as selepressin or angiotensin II may reduce catecholamine requirements but has not consistently demonstrated an improvement in mortality.
More recently, a meta-analysis evaluating all non-adrenergic therapeutic strategies confirmed that none of these strategies individually provides a clear mortally benefit. However, when considered collectively, non-adrenergic approaches were associated with improved outcomes in patients with septic shock, supporting the concept that strategies aimed at bypassing or limiting excessive catecholaminergic stimulation may be beneficial in this population.
In parallel, α2-adrenergic agonists are increasingly used as sedative agents in intensive care. Dexmedetomidine has been shown in experimental models to restore vascular responsiveness to vasopressors. Clinical studies conducted in patients with severe sepsis or septic shock have also suggested a potential benefit, including reduced vasopressor requirements and improved hemodynamic stability in the most severely ill patients. Therefore, dexmedetomidine may provide clinically relevant benefits through improved hemodynamic control during the acute phase of septic shock. By restoring vasopressor sensitivity, dexmedetomidine could potentially address an important therapeutic gap in the management of refractory septic shock.
The underlying hypothesis is that the downregulation of adrenergic receptors observed during sepsis may be a direct consequence of sympathetic hyperactivation. Reversal of this phenomenon through "sympathetic deactivation" using α2-agonists may restore vascular responsiveness to vasopressors.
To prepare the ADRESS trial, the investigator's team conducted a multicenter, randomized, double-blind pilot study (ADRESS Pilot). The primary objective of ADRESS Pilot was to assess the effect of dexmedetomidine on vascular responsiveness to phenylephrine in patients with septic shock and vasopressor resistance. Mortality was also evaluated as a secondary outcome. Thirty-two patients were randomized (16 per group). Due to the small sample size, an imbalance in baseline characteristics was observed, with greater vasopressor resistance in the dexmedetomidine group at the time of randomization, even before treatment administration. Patients allocated to the dexmedetomidine group had lower baseline responsiveness to phenylephrine, which limited the comparability of the groups and made the interpretation of the results particularly challenging.
Nevertheless, 30-day and 90-day mortality were not significantly higher in the dexmedetomidine group. No significant differences were observed between groups in the occurrence of bradycardia or in heart rate. Several sensitivity analyses adjusting for baseline imbalances did not demonstrate a clear beneficial effect of dexmedetomidine. However, these findings may reflect insufficient statistical power, given the very small sample size of the study.
Therefore, a larger and adequately powered trial is required to determine whether dexmedetomidine provides a clinical benefit in patients with refractory septic shock.
Based on the results of ADRESS Pilot, the investigator propose to adapt the design of the ADRESS trial to increase the likelihood of detecting a potential treatment effect. Following the pilot study, the scientific committee decided to modify the study design from a double-blind to an open-label trial in order to reduce the risk of excessive sedation resulting from the addition of a sedative drug in patients already receiving continuous sedation. The target population consists of patients with refractory septic shock and a high risk of mortality. These patients are likely to derive the greatest benefit from a sympathetic deactivation strategy using dexmedetomidine in order to improve clinical outcomes.
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Tipo di studio
Tipo di studio
Iscrizione (Stimato)
Iscrizione
Fase
Fase
- Fase 3
Contatti e Sedi
Contatto studio
Contatto studio
- Nome: Auguste DARGENT, Doctor
- Numero di telefono: +33 4 78 86 20 06
- Email: auguste.dargent@chu-lyon.fr
Backup dei contatti dello studio
- Nome: Jean-Pierre QUENOT, Professor
- Numero di telefono: +33 3 80 29 37 51
- Email: jean-pierre.quenot@chu-dijon.fr
Luoghi di studio
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Amiens, Francia, 80054
- CHU Amiens-Picardie - Service de médecine intensive-réanimation
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Contatto:
- Yoann ZERBIB, MD
- Numero di telefono: +33322088000
- Email: zerbib.yoann@chu-amiens.fr
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Investigatore principale:
- Yoann ZERBIB, MD
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Chalon-sur-Saône, Francia, 71321
- Centre Hospitalier Chalon-sur-Saône - Service de réanimation et surveillance continue
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Investigatore principale:
- Thomas MALDINEY, MD
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Contatto:
- Thomas MALDINEY, MD
- Numero di telefono: +333 85 91 01 11
- Email: thomas.maldiney@ch-chalon71.fr
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Dieppe, Francia, 76202
- Centre Hospitalier de Dieppe - Service de réanimation et unité de soins continus
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Contatto:
- Antoine MARCHALOT, MD
- Numero di telefono: +33232147253
- Email: AMarchalot@ch-dieppe.fr
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Investigatore principale:
- Antoine MARCHALOT, MD
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Dijon, Francia, 21000
- CHU Dijon Bourgogne - Service de médecine intensive et réanimation
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Investigatore principale:
- Jean-Pierre QUENOT, MD
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Contatto:
- Jean-Pierre QUENOT, MD
- Numero di telefono: +33380293751
- Email: jean-pierre.quenot@chu-dijon.fr
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Garches, Francia, 92380
- APHP - Hôpital Raymond-Poincaré - Service de Médecine intensive-réanimation
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Investigatore principale:
- Djillali ANNANE, MD
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Contatto:
- Djillali ANNANE, MD
- Numero di telefono: +331 47 10 77 78
- Email: djillali.annane@aphp.fr
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La Roche-sur-Yon, Francia, 85925
- Centre Hospitalier Départemental de Vendée - Service de réanimation polyvalente
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Contatto:
- Samuel GENSBURGER, MD
- Numero di telefono: +332 51 44 61 61
- Email: samuel.gensburger@ght85.fr
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Investigatore principale:
- Samuel GENSBURGER, MD
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Le Mans, Francia, 72037
- Centre Hospitalier Le Mans - Service de réanimation médico-chirurgicale
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Investigatore principale:
- Jean-Christophe CALLAHAN, MD
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Contatto:
- Jean-Christophe CALLAHAN, MD
- Numero di telefono: +332 43 43 24 58
- Email: jccallahan@ch-lemans.fr
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Lyon, Francia, 69003
- Hôpital Edouard Herriot - Service de Médecine intensive - reanimation
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Investigatore principale:
- Laurent ARGAUD, MD
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Contatto:
- Laurent ARGAUD, MD
- Numero di telefono: +334 72 11 28 62
- Email: laurent.argaud@chu-lyon.fr
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Lyon, Francia, 69004
- Hôpital de la Croix Rousse - Service de médecine intensive et réanimation
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Investigatore principale:
- Louis CHAUVELOT, MD
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Contatto:
- Louis CHAUVELOT, MD
- Numero di telefono: +33472071762
- Email: louis.chauvelot@chu-lyon.fr
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Lyon, Francia, 69007
- Hôpital Saint Joseph Saint Luc - Service de réanimation
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Investigatore principale:
- Emmanuel VIVIER, MD
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Contatto:
- Emmanuel VIVIER, MD
- Numero di telefono: +334 78 61 88 18
- Email: evivier@saintjosephsaintluc.fr
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Nice, Francia, 06200
- Hôpital de l'archet - Service de médecine intensive et réanimation
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Contatto:
- Alan MOUROUGAYEN, MD
- Numero di telefono: +334 92 03 77 77
- Email: mourougayen.a@chu-nice.fr
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Investigatore principale:
- Alan MOUROUGAYEN, MD
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Pierre-Bénite, Francia, 69310
- Service d'Anesthésie - Médecine Intensive - Réanimation Hôpital Lyon Sud
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Contatto:
- Auguste DARGENT, Doctor
- Numero di telefono: +33 4 78 86 20 06
- Email: auguste.dargent@chu-lyon.fr
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Investigatore principale:
- Auguste DARGENT, MD
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Rennes, Francia, 35033
- CHU de Rennes - Service de médecine intensive et réanimation
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Investigatore principale:
- Nicolas TERZI, MD
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Contatto:
- Nicolas TERZI, MD
- Numero di telefono: +33299284321
- Email: Nicolas.TERZI@chu-rennes.fr
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Saint-Priest-en-Jarez, Francia, 42270
- Hôpital Nord - CHU Saint Etienne - Service de médecine intensive
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Contatto:
- Sophie PERINEL, MD
- Numero di telefono: +33477828002
- Email: sophie.perinel.ragey@univ-st-etienne.fr
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Investigatore principale:
- Sophie PERINEL, MD
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Strasbourg, Francia, 67091
- Nouvel Hôpital Civil - Service de médecine intensive et réanimation
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Contatto:
- Julie HELMS, Professor
- Numero di telefono: +333 69 55 04 34
- Email: julie.helm@chru-strasbourg.fr
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Investigatore principale:
- Julie HELMS, Professor
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Toulon, Francia, 83100
- Centre Hospitalier Intercommunal de Toulon - Service de réanimation polyvalente
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Investigatore principale:
- Jonathan CHELLY, MD
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Contatto:
- Jonathan CHELLY, MD
- Numero di telefono: +334 94 14 50 00
- Email: jonathan.chelly@ch-toulon.fr
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Trévenans, Francia, 90400
- HOPITAL NORD FRANCHE-COMTE - Service de réanimation
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Contatto:
- Paul MONASTEROLO, MD
- Numero di telefono: +333 84 98 21 91
- Email: PAUL.MONASTEROLO@hnfc.fr
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Investigatore principale:
- Paul MONASTEROLO, MD
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Villeurbanne, Francia, 69100
- Médipôle Hôpital Privé Lyon Villeurbanne- Service de réanimation polyvalente
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Contatto:
- Stanislas LEDOCHOWSKI, MD
- Numero di telefono: +334 87 65 01 88
- Email: sledochowski@scprea.fr
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Investigatore principale:
- Stanislas LEDOCHOWSKI, MD
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
- Adulto
- Adulto più anziano
Accetta volontari sani
Descrizione
Inclusion Criteria:
- Age ≥ 18 years old
- Septic shock, defined by the "sepsis-3" criteria :
oProven or suspected infection, with modification of the SOFA score ≥ 2 points oWith persistent hypotension requiring vasopressors to maintain MAP ≥ 65 mmHg
And serum lactate level > 2 mmol/L despite adequate vascular filling
- Catecholamine resistance, defined by
- The need for a dose of norepinephrine ≥ 0.5 µg/kg/min for more than 2 consecutive hours
AND persistence of circulatory failure with at least one of the following criteria present in the 2 hours prior to randomization : hyperlactatemia (> 2 mmol/L) and/or mottling (score ≥ 1) and/or oliguria (diuresis < 0.5 mL/kg/h over the last 2 hours)
- Adequate vascular filling : ≥ 30 mL/kg OR absence of preload-dependency criteria at time of assessment (passive leg lift, pulsed pressure variation)
- Invasive mechanical ventilation
- Patient affiliated to the national heatlh insurance system
- Written consent from the
Exclusion Criteria:
- Cardiac index < 2.2 L/min/m2 after volume correction
- Bradycardia < 55 bpm (apart from treatment with ẞ-bloquant) or 2nd or 3rd degree BAV not equipped
- Patients who are moribund or for whom death appears imminent within 24 hours (as determined by the investigator's clinical judgment
- Severe hepatic insufficiency with TP and factor < 50% in the absence of DIC (disseminated intravascular coagulationà
- Hypersensitivity to dexmedetomidine
- Patient on dexmedetomidine before inclusion
- Patients who received iproniazide within the 15 days preceding randomization
- Patient for whom a decision has been made to limit the use of therapies
- Person subject to limited judicial protection or a legal protection measure (curatorship, guardianship)
- Patients participating in another clinical study with an ongoing exclusion period at the time of inclusion
- Pregant or breastfeeding woman
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Nessuno (etichetta aperta)
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
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Sperimentale: Dexmedetomidine 100 µg/Ml
Patients in the experimental arm will receive a continuous infusion on dexmedetomidine at 0.7 µg/kg/h for the first 2 hours, and then 1 µg/kg/h at fixed dosed, as long as sedation and/or a norepinephrine dose >0.1 µg/kg/min is required, for a maximum duration of 14 days.
The dose will be halved 2 hours prior to complete weaning.
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Continuous infusion on dexmedetomidine at 0,7 μg/kg/h for 2 hours and then 1 μg/kg/h at fixed dose
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Altro: Standard care
Patients in the standard care arm will receive optimized, protocolized management in strict adherence to current guidelines, particularly regarding fluid administration, source control, antibiotic therapy, and substitutive corticosteroid therapy
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fluid administration, source control, antibiotic therapy, and substitutive corticosteroid therapy in strict adherence to current guidelines
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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30-day mortality
Lasso di tempo: Day 30 after randomization
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Vital status at day 30 after randomization.
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Day 30 after randomization
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Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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72-hour mortality
Lasso di tempo: 72 hours after randomization
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Vital status at 72 hours after randomization
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72 hours after randomization
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Vasopressor exposure
Lasso di tempo: 6, 12 and 24 hours after randomization
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Cumulative vasopressor dose and peak vasopressor dose expressed as norepinephrine-equivalent dose (NEE score)
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6, 12 and 24 hours after randomization
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Use of vasopressin or recue therapies
Lasso di tempo: From randomization to day 30
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Proportion of patients requiring vasopressin or any therapy for refractory shock during follow-up
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From randomization to day 30
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Mean arterial pressure (MAP)
Lasso di tempo: Baseline, 6 hours, 12 hours and 24 hours after randomization
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Evolution of mean arterial pressure (MAP) and MAP to norepinephrine-equivalent (Neq) dose ration (MAP/Neq) to assess vasopressor responsiveness
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Baseline, 6 hours, 12 hours and 24 hours after randomization
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Vasopressor-free days
Lasso di tempo: Day 0 to day 30
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Number of days without vasopressor therapy during the first 30 days following randomization
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Day 0 to day 30
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Mechanical ventilation-free days
Lasso di tempo: Day 0 to day 30
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Number of days without mechanical ventilation during the first 30 days following randomization
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Day 0 to day 30
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Blood lactate concentration
Lasso di tempo: 6 hours, 12 hours and 24 hours after randomization
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Arterial blood lactate levels
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6 hours, 12 hours and 24 hours after randomization
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SOFA score
Lasso di tempo: Baseline and day 3 after randomization
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Evolution of organ failure assessed using the Sequential Organ Failure Assessment (SOFA) score (minimum 0, maximum 24).
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Baseline and day 3 after randomization
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Cumulative fluid balance
Lasso di tempo: Day 0 to day 5
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Difference between total fluid intake and total fluid output
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Day 0 to day 5
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New-onset or persistent atrial fibrillation
Lasso di tempo: Within 14 days after randomization
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Occurrence of new-onset atrial fibrillation or persistence of atrial fibrillation requiring clinical management.
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Within 14 days after randomization
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ICU and 90-day mortality
Lasso di tempo: At day 3 and day 90 after randomization
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Vital status at Intensive Care Unit (ICU) discharge and at 90 days following randomization.
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At day 3 and day 90 after randomization
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Clinically significant bradycardia
Lasso di tempo: During the treatment period (until day 30)
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Occurrence of bradycardia defined as heart rate < 50 bpm requiring therapeutic intervention
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During the treatment period (until day 30)
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Coma-free days
Lasso di tempo: Day 0 to day 30 or ICU discharge
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Number of days without coma up to day 30
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Day 0 to day 30 or ICU discharge
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ICU delirium
Lasso di tempo: Daily until day 30 or ICU discharge
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Occurrence of delirium during ICU stay assessed daily using the CAP-ICU in patients with RASS≥ -3
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Daily until day 30 or ICU discharge
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Collaboratori e investigatori
Sponsor
Sponsor
Collaboratori
Collaboratori
Studiare le date dei record
Studia le date principali
Inizio studio (Stimato)
Inizio studio
Completamento primario (Stimato)
Completamento primario
Completamento dello studio (Stimato)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
- Malattie vascolari
- Malattia cardiovascolare
- Complicanze postoperatorie
- Processi patologici
- Infezioni
- Sindrome da risposta infiammatoria sistemica
- Infiammazione
- Shock
- Condizioni patologiche, segni e sintomi
- Sepsi
- Shock, settico
- Vasoplegia
- Composti eterociclici, 1-anello
- Composti eterociclici
- Azoli
- Imidazoli
- Dexmedetomidina
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- 69HCL25_0485
- 2025-524122-18-00 (Ctis)
Informazioni su farmaci e dispositivi, documenti di studio
Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti
Studia un dispositivo regolamentato dalla FDA degli Stati Uniti
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