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Created page with "== Introduction == A Ventilator is a machine designed to provide mechanical ventilation by moving breathable air into and out of the lungs, to deliver breaths to a patient who is physically unable to breathe, or breathing insufficiently. While modern ventilators are computerized machines, patients can be ventilated with a bag valve mask, a simple hand-operated bag-valve mask. == History == The history of the ventilator can be traced back to the earliest days of medi..."