Randomised, sham-controlled, double-blinded, multicentre international trial to evaluate the efficacy of the Ventfree Respiratory Muscle Stimulator to assist ventilator weaning in critically ill patients: a study protocol of a randomised controlled trial
Abstract
Introduction: Nearly half of patients who receive invasive mechanical ventilation for acute respiratory failure require over 4 days of ventilator support, each day of which is associated with increased morbidity, mortality and cost. Many of these patients develop expiratory muscle atrophy and weakness, which are linked to failed extubation and weaning. We seek to test the hypothesis that exhalation synchronised abdominal functional electrical stimulation reduces mechanical ventilation duration.
Methods and analysis: This pivotal superiority trial will be performed in up to 30 intensive care units (ICUs) in the USA, France, the Netherlands and Australia. Adults (≥22 years old) who have been mechanically ventilated for 24-96 hours and are expected to remain ventilated for another 24+ hours are potentially eligible. We will recruit participants until 150 successful liberations from mechanical ventilation occur. To achieve this, we estimate that a maximum of 272 participants will be randomised in a 1:1 ratio to receive 30 min of active exhalation synchronised abdominal functional electrical stimulation (vs sham). The intervention will be applied using the VentFree Respiratory Muscle Stimulator two times per day, a minimum of 5 days per week, for a maximum of 28 days or until ICU discharge. The primary outcome is time from first intervention to successful liberation from mechanical ventilation. Secondary outcomes include cough peak flow (CPF) and maximum expiratory pressure (MEP)…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 272 participants or records.
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