Evaluation of a new hyperbaric oxygen ventilator during volume-controlled ventilation

Area of Science:

• Biomedical Engineering
• Respiratory Care

Background:

• The Shangrila590 hyperbaric ventilator's performance was assessed.
• Evaluation focused on its function during volume-controlled ventilation.

Purpose of the Study:

• To evaluate the performance of the Shangrila590 hyperbaric ventilator.
• To assess delivered tidal volume (VT) and minute volume (MV) accuracy under hyperbaric conditions.

Main Methods:

• Experiments were conducted in a hyperbaric chamber at pressures from 101 to 284 kPa (1.0 to 2.8 atm abs).
• The ventilator, in volume control ventilation (VCV) mode, was connected to a test lung.
• Delivered volumes (VT, MV) and peak inspiratory pressure (Ppeak) were compared against set values (VTset) across 20 respiratory cycles.

Main Results:

• Differences between set and delivered VT and MV were small and clinically insignificant across most settings.
• Peak inspiratory pressure (Ppeak) increased predictably with higher ambient pressures.
• At 2.8 atm abs with VTset 1,000 mL, significantly greater VT, MV, and Ppeak were observed.

Conclusions:

• The Shangrila590 hyperbaric ventilator demonstrates good performance for hyperbaric environments.
• Stable VT and MV were achieved during VCV within specific VTset and pressure ranges (e.g., 400-800 mL at 1.0-2.8 atm abs).
• The ventilator is reliable for hyperbaric ventilation within its validated operational parameters.