NCT06024993

Dead Space in Mechanical Ventilation With Constant Expiratory Flow

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 13 (estimated)
• Sponsor: University Hospital, Antwerp · Academic / Other
• Sex: All
• Age: 18 Years – 70 Years
• Healthy volunteers: Not accepted

Summary

Conventional continuous mandatory mechanical ventilation relies on the passive recoil of the chest wall for expiration. This results in an exponentially decreasing expiratory flow. Flow controlled ventilation (FCV), a new ventilation mode with constant, continuous, controlled expiratory flow, has recently become clinically available and is increasingly being adopted for complex mechanical ventilation during surgery. In both clinical and pre-clinical settings, an improvement in ventilation (CO2 clearance) has been observed during FCV compared to conventional ventilation. Recently, Schranc et al. compared flow-controlled ventilation with pressure-regulated volume control in both double lung ventilation and one-lung ventilation in pigs. They report differences in dead space ventilation that may explain the improved CO2 clearance, although their study was not designed to compare dead space ventilation within the group of double lung ventilation. Dead space ventilation, or "wasted ventilation", is the ventilation of hypoperfused lung zones, and is clinically relevant, as it is a strong predictor of mortality in patients with the acute respiratory distress syndrome (ARDS) and is correlated with higher airway driving pressures which are thought to be injurious to the lung (lung stress). This trial aims to study the difference in dead space ventilation between conventional mechanical ventilation in volume-controlled mode and flow controlled-ventilation.

Conditions

• Mechanical Ventilation
• Artificial Respiration

Interventions

Type	Name	Description
DEVICE	Flow-controlled ventilation (FCV)	20 minutes of FCV, delivered with the CE-marked Evone ventilator (Ventinova medical, the Netherlands)
DEVICE	Conventional volume-controlled ventilation (VCV)	20 minutes of conventional VCV, delivered with the CE-marked Aisys CS3 (GE Healthcare, USA) or Flow-i (Getinge, Sweden) ventilators.

Timeline

• Start date: 2024-07-22
• Primary completion: 2025-12-30
• Completion: 2026-04-30
• First posted: 2023-09-06
• Last updated: 2025-01-22

Locations

1 site across 1 country: Belgium