MCQ IN MEDICINE

Detailed explanation-1: -The first application of positive pressure ventilation was described in 1543. Oxygen was discovered in 1774. The first mechanical ventilator provided negative pressure ventilation and was used in a child with poliomyelitis in 1928.

Detailed explanation-2: -The Pulmotor, an early device for positive pressure ventilation, was introduced in 1907 by German businessman and inventor Johann Heinrich Dräger and his son Bernhard.

Detailed explanation-3: -However, mechanical ventilators, in the form of negative-pressure ventilation, first appeared in the early 1800s. Positive-pressure devices started to become available around 1900 and today’s typical intensive care unit (ICU) ventilator did not begin to be developed until the 1940s.