- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT07603310
Influence of Lung Recruitment Potential on PEEP Titration Strategies in ARDS Patients. (RECRUIT-PEEP)
Influence of the Lung Recruitment Potential on the Response to Two PEEP Titration Strategies in Patients With Acute Respiratory Distress Syndrome (ARDS)
Panoramica dello studio
Stato
Descrizione dettagliata
This is a prospective, randomized, open-label, parallel-group pilot study conducted at the Adult Intensive Care Unit of Hospital Dr. Franco Ravera Zunino (HFRZ). Eligible adult patients under invasive mechanical ventilation with moderate-to-severe ARDS within 36 hours of fulfilling Berlin criteria will be evaluated.
Prior to randomization, the patient's recruitment potential will be measured bedside using the R/I ratio (where > 0.5 indicates high recruitment potential and <= 0.5 indicates low potential). Eligible participants will then be randomized 1:1 into two PEEP titration groups:
- PEEP titration targeted to achieve the best static compliance of the respiratory system.
- PEEP titration guided by transpulmonary pressure measured via an esophageal balloon to target a positive end-expiratory transpulmonary pressure.
Crucially, immediately before starting the specific PEEP titration protocol in either group, an identical, standardized lung recruitment maneuver will be performed. This maneuver is executed in pressure-controlled ventilation (PCV) with a control pressure of 15 cmH2O, I:E ratio of 1:1, FiO2 1.0, starting with PEEP 5 cmH2O and increasing by 5 cmH2O every 10 seconds up to PEEP 25 cmH2O, maintaining a maximum peak pressure limit of 40 cmH2O for exactly 1 minute.
Standard baseline ventilator parameters will follow protective ventilation targets: volume-controlled ventilation, tidal volume 6-8 mL/kg of predicted body weight, respiratory rate adjusted to keep pH 7.25-7.45, plateau pressure < 28 cmH2O, and driving pressure < 14 cmH2O. Physiological parameters (PaO2/FiO2, driving pressure, ventilatory ratio, static compliance) will be recorded at 1, 24, 48, and 72 hours. The primary outcome is the change in oxygenation (PaO2/FiO2 ratio) at 24 hours. The study will explore how the baseline phenotype of lung recruitability alters early mechanical and gas exchange outcomes.
Tipo di studio
Iscrizione (Stimato)
Fase
- Non applicabile
Contatti e Sedi
Contatto studio
- Nome: Esteban Santis, RT.
- Numero di telefono: +56 940367716
- Email: esteban.santis@ogb.cl
Backup dei contatti dello studio
- Nome: Hospital Dr. Franco Ravera Zunino
- Numero di telefono: +56 729383
- Email: carolina.lindsay.brain@gmail.com
Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
- Adulto
- Adulto più anziano
Accetta volontari sani
Descrizione
Inclusion Criteria:
- Diagnosis of moderate or severe Acute Respiratory Distress Syndrome (ARDS) according to the Berlin definition: acute onset, bilateral opacities not fully explained by heart failure or fluid overload, and PaO2/FiO2 <= 200 mmHg with PEEP >= 5 cmH2O.
- ARDS duration < 36 hours since fully meeting Berlin consensus criteria.
- Relative hemodynamic stability: absence of refractory shock, defined as norepinephrine dose <= 0.5 mcg/kg/min.
Exclusion Criteria:
- Evidence of active pulmonary air leaks (bronchopleural fistula, pneumothorax, pneumomediastinum).
- Severe uncorrected hemodynamic instability (norepinephrine > 0.5 mcg/kg/min).
- Contraindications for esophageal balloon placement (esophageal obstruction, known perforation, recent esophageal surgery, severe esophagitis).
- Elevated intracranial pressure or conditions where hypercapnia-induced increases in intracranial pressure must be avoided (intracranial hemorrhage, cerebral contusion, cerebral edema, mass effect with midline shift on CT).
- Known pregnancy.
- Severe coagulopathy (platelet count < 5,000/uL or INR > 3).
- Airway opening pressure higher than 15 cmH2O (AOP > 15 cmH2O).
- History of severe neuromuscular disease or chronic respiratory disease.
- Having received invasive mechanical ventilation for more than 96 hours.
- Inability to obtain informed consent or refusal by the legal representative.
- Contained laparotomy (open abdomen).
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
|
Sperimentale: Best Static Compliance Titration
Patients receive positive end-expiratory pressure (PEEP) titration guided by the best static compliance of the respiratory system after undergoing a standardized initial lung recruitment maneuver
|
PEEP Titration by Static Compliance: Following the initial recruitment maneuver, an individualized PEEP decremental titration step-protocol is performed to identify the specific PEEP level that maximizes the static compliance of the respiratory system, aiming to optimize the balance between alveolar recruitment and overdistension. Initial Lung Recruitment Maneuver : Prior to individualized PEEP titration, all participants in this arm will undergo an initial standardized lung recruitment maneuver. This procedure will be executed in Pressure-Controlled Ventilation (PCV) mode, utilizing a driving/control pressure of 15 cmH2O. The recruitment process will begin at a baseline Positive End-Expiratory Pressure (PEEP) of 5 cmH2O, followed by incremental steps of 5 cmH2O every 10 seconds until reaching a maximum PEEP of 25 cmH2O. A peak airway pressure limit of 40 cmH2O will be strictly maintained during the maneuver for a total duration of 1 minute.
Altri nomi:
|
|
Sperimentale: Transpulmonary Pressure Titration
Patients receive positive end-expiratory pressure (PEEP) titration guided by transpulmonary pressure estimation via an esophageal balloon catheter after undergoing an identical standardized initial lung recruitment maneuver.
|
PEEP Titration by Transpulmonary Pressure: Following the initial recruitment maneuver, PEEP is titrated and protocolized via real-time esophageal balloon monitoring to target and maintain a slightly positive expiratory transpulmonary pressure, minimizing cyclic alveolar collapse and overdistension. Initial Lung Recruitment Maneuver: Prior to individualized PEEP titration, all participants in this arm will undergo an initial standardized lung recruitment maneuver. This procedure will be executed in Pressure-Controlled Ventilation (PCV) mode, utilizing a driving/control pressure of 15 cmH2O. The recruitment process will begin at a baseline Positive End-Expiratory Pressure (PEEP) of 5 cmH2O, followed by incremental steps of 5 cmH2O every 10 seconds until reaching a maximum PEEP of 25 cmH2O. A peak airway pressure limit of 40 cmH2O will be strictly maintained during the maneuver for a total duration of 1 minute.
Altri nomi:
|
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Change in Early Oxygenation (PaO2/FiO2 Ratio).
Lasso di tempo: Baseline and 24 hours post-PEEP titration
|
The change in gas exchange efficiency is calculated as the absolute difference between the baseline PaO2/FiO2 ratio and the PaO2/FiO2 ratio measured 24 hours after individualized PEEP titration.
|
Baseline and 24 hours post-PEEP titration
|
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Evolution of Static Compliance of the Respiratory System
Lasso di tempo: Baseline, 1, 24, 48, and 72 hours
|
Changes in static compliance calculated via the formula: Tidal Volume / (Plateau Pressure - PEEP).
|
Baseline, 1, 24, 48, and 72 hours
|
|
Evolution of Driving Pressure and Plateau Pressure
Lasso di tempo: Baseline, 1, 24, 48, and 72 hours
|
Serial monitoring of driving pressure (Plateau Pressure - PEEP) and plateau pressure to evaluate lung stress.
|
Baseline, 1, 24, 48, and 72 hours
|
|
Ventilatory Efficiency
Lasso di tempo: Baseline, 24, 48, and 72 hours
|
Evaluated using the Ventilatory Ratio (VR), which correlates physiological dead space and minute ventilation.
|
Baseline, 24, 48, and 72 hours
|
|
Incidence of Elevated Airway Opening Pressure (AOP)
Lasso di tempo: Pre-randomization (Baseline)
|
Proportion of patients exhibiting an airway opening pressure greater than 5 cmH2O.
|
Pre-randomization (Baseline)
|
|
Ventilator-Free Days (VFD)
Lasso di tempo: Up to Day 28
|
Number of days alive and free from invasive mechanical ventilation within a 28-day window.
|
Up to Day 28
|
|
Incidence of Procedure-Related Adverse Events
Lasso di tempo: Throughout mechanical ventilation (Up to 28 days)
|
Proportion of participants experiencing complications due to recruitment maneuvers or PEEP titration (e.g., severe hypotension, barotrauma).
|
Throughout mechanical ventilation (Up to 28 days)
|
Collaboratori e investigatori
Investigatori
- Cattedra di studio: Francisco Cerda, RT., Hospital Dr. Franco Ravera Zunino
- Cattedra di studio: Javier Astudillo, MD., Hospital Dr. Franco Ravera Zunino
- Cattedra di studio: Jennifer Ayuso, RT., Hospital Dr. Franco Ravera Zunino
- Cattedra di studio: Rodrigo Arevalo, RT., Hospital Dr. Franco Ravera Zunino
- Cattedra di studio: Carlos Pellegrini, MD., Hospital Dr. Franco Ravera Zunino
- Investigatore principale: Esteban Santis, RT., Hospital Dr. Franco Ravera Zunino
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Inizio studio (Stimato)
Completamento primario (Stimato)
Completamento dello studio (Stimato)
Date di iscrizione allo studio
Primo inviato
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Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
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Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- HFRZ-UPC-2026-01
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