Ambu bag (bag valve mask) – How to use & is it an alternative to a ventilator?

Introduction The black swan event of Covid 19 amongst many things taught us the importance of oxygen in patient care. The non-availability of ventilators was a major reason for the setback and delay in critical care. There was a surge in the demand for ventilators. Conventional ventilators are high in cost and would have a high lead time to manufacture. The machines are not portable and cannot be quickly moved to an emergency site....