emergency situation by pre-hospital healthcare providers and are small enough to be easily transportable. Having a manual override control for use during mask CPR they meet the requirements of the current resuscitation standards. The Oxylator (R) EM-100 introduced in the late 1990s and subsequently replaced by the more flexible Oxylator (R) EMX and HD are pressure cycled devices that utilize pressure, rather than time, cycling to ventilate the patient. More recently the microVENT resuscitator range introduced two new models, the microVENT(R) CPR and the microVENT(R)World. These two new time/volume resuscitators meet the latest requirements for resuscitation and are lighter and smaller than most competitor products. NB: Most established automatic resuscitator manufacturers developed time/volume cycled resuscitators as these are acknowledged as preferable to pressure cycled resuscitators. Response considerations A manual resuscitator should be used on a victim only in an environment where the air is unquestionably safe to breathe. References External links General It began with the Pulmotor: One Hundred Years of Artificial Ventilation by Ernst Bahns, published by Dräger Medical AG & Co. KG, Lübeck, Germany (original manufacturers of the Pulmotor, and many other ventilation items, to the present day) (a lengthy, illustrated history of the development of artificial ventilation, interwoven with the publishers' own apparently self-promotional corporate history). Pulmotor "1907: The first mechanical ventilator: The Pulmotor," by John Bottrell (registered respiratory therapist), April 19, 2017, Asthma History blog, retrieved April 12, 2020 "Draeger Pulmotor", Wood Library-Museum of Anesthesiology "The Return of the Pulmotor as a 'Resuscitator': A Back-Step toward the Death of Thousands," by Yandell Henderson, December 1943, Science. It began with the Pulmotor: One Hundred Years of Artificial Ventilation by Ernst Bahns, published by Dräger Medical AG & Co. KG, Lübeck, Germany (original manufacturers of the Pulmotor). Medical equipment