NCT02896673

Evaluation of the Diagnostic Performance of Electrical Impedance Tomography to Detect Situations at Risk of Lesions Induced by Conventional Mechanical Ventilation in ARDS

Evaluation of the Diagnostic Performance of Electrical Impedance Tomography (EIT) to Detect Situations at Risk of Lesions Induced by Conventional Mechanical Ventilation in Acute Respiratory Distress Syndrome (ARDS)

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 3 (actual)
• Sponsor: Hospices Civils de Lyon · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Acute respiratory distress syndrome remains a serious condition, with a mortality rate of between 30 and 50%. The use of mechanical ventilation with small tidal volumes, and by limiting the plateau pressure in the respiratory tract below 30 cm H2O has been shown to reduce mortality by approximately 10%, probably by reducing pulmonary hyperinflation and pulmonary lesions induced by mechanical ventilation. It is therefore now established that the respirator settings influence patient prognosis. However, around 30% of patients with ARDS ventilated with these settings supposedly protective continue to present signs of pulmonary hyperinflation on tomodensitometry, suggesting an additional reduction in the tidal volume could be required in certain patients. Electrical impedance tomography (EIT) is a new imaging technique that gathers functional pulmonary information at bedside. This technique also allows a regional analysis, allowing the complexity of the spatial distribution of ARDS pulmonary lesions to be understood. The hypothesis is that EIT is a reliable method to detect at-risk situations of lesions induced by mechanical ventilation among patients with ARDS.

Conditions

• Respiratory Distress Syndrome

Interventions

Type	Name	Description
PROCEDURE	ventilatory conditions and measures with scanner and EIT	Different ventilatory conditions are studied and measures are acquired with scanner and EIT Time A: measure under basal conditions (TVbasal=6ml/kg of predicted weight), basal PEP, basal inspiratory time / total time = 30%) Time B: different PEP are applied for 4 minutes: 5, 10, 15, 20 cm of H2O conserving the basal TV Time C: different TV are applied for 4 minutes: 4, 7, 10 ml/kg of predicted weight conserving the basal PEP and the basal inspiratory time Time D: recruitment in continuous positive airway pressure at 45 cm of H2O is performed for 30 seconds Time E: return to adjustment period A

Timeline

• Start date: 2012-07-17
• Primary completion: 2015-01-21
• Completion: 2015-01-21
• First posted: 2016-09-12
• Last updated: 2018-11-15

Locations

1 site across 1 country: France