Randomized Pilot Trial of Two Modified Endotracheal Tubes To Prevent Ventilator-associated Pneumonia

Area of Science:

• Critical Care Medicine
• Infectious Diseases
• Medical Device Engineering

Background:

• Ventilator-associated pneumonia (VAP) is a common and costly hospital-acquired infection linked to endotracheal tubes (ETTs).
• Modified ETT designs aim to reduce microaspiration and biofilm formation, potentially preventing VAP.
• Current evidence for modified ETTs is limited, with safety concerns yet to be fully addressed.

Purpose of the Study:

• To assess the feasibility and safety of a pilot randomized controlled trial comparing two modified ETTs against a standard ETT.
• To inform the design of a larger pivotal trial for VAP prevention strategies.
• To evaluate the efficacy of modified ETTs in reducing tracheal colonization and VAP incidence.

Main Methods:

• A pilot randomized controlled trial involving 102 patients undergoing emergency endotracheal intubation.
• Comparison of three ETT types: standard polyvinylchloride-cuffed (PVC-ETT), polyurethane-cuffed (PUC-ETT), and polyurethane-cuffed with continuous aspiration of subglottic secretions (PUC-CASS-ETT).
• Coprimary endpoints included tracheal bacterial colonization (>10^6 CFU/mL) and invasively diagnosed VAP incidence.

Main Results:

• Randomization and blinding procedures were successful in the pilot study.
• No significant differences were observed in tracheal colonization rates between the PVC-ETT, PUC-ETT, and PUC-CASS-ETT groups.
• The incidence of invasively or clinically diagnosed VAP did not differ significantly across the three ETT groups. No unexpected adverse events were reported.

Conclusions:

• Conducting a randomized trial of ETTs for VAP prevention during emergency intubation is feasible and appears safe.
• Preliminary data suggest no difference in tracheal colonization or VAP occurrence among the tested ETT types.
• Further research is warranted to explore the potential of modified ETTs in VAP prevention.