Fig. 1From: Data automated bag breathing unit for COVID-19 ventilator shortagesAutomated Bag Breathing Unit (ABBU) and breathing circuit. A ABBU. B Front panel with LCD display and adjustment knobs. C ABBU cover openings. D ABBU breathing circuit used for testing. Porcine experiments added a sidestream ETCO2 analyzer between components 2 and 3)Back to article page