On Tue, Apr 14, 2020 at 09:53 PM, Dr. Flywheel wrote:
thinking?that O2 metered?injection could conceivably?be implemented
I've seen designs where the O2 and Air valves were each activated for controlled time to mix the gasses. The advantage of the fuel injector is it could be pulsed many times in an inhalation cycle so the air/oxygen bursts should be fully mixed by the time it gets down the inhalation circuit tubing. If there is a pinpoint nozzle in an injector, maybe it could be enlarged, should that actually be an issue.?
Possibility only be providing the oxygen enriched "air" while the lungs are filling and if the later part of the cycle leaks gas while maintaining PEEP and such, providing only air, could help reduce oxygen usage. Especially with "low pressure" ventilators where leakage may be part of the design to ease flow control and for the system to be less stiff and more tolerant to a patient?coughing.
Tom, wb6b
