An optimized set-up for helmet noninvasive ventilation improves pressure support delivery and patient-ventilator interaction.

Objective: To test the effects on mechanical performance of helmet noninvasive ventilation (NIV) of an optimized set-up concerning the ventilator settings, the ventilator circuit and the helmet itself.

Subjects And Methods: In a bench study, helmet NIV was applied to a physical model. Pressurization and depressurization rates and minute ventilation (MV) were measured under 24 conditions including pressure support of 10 or 20 cm H(2)O, positive end expiratory pressure (PEEP) of 5 or 10 cm H(2)O, ventilator circuit with "high", "intermediate" or "low" resistance, and cushion deflated or inflated.