Which of the following devices is considered to be the first electrically powered negative pressure ventilator?

Name: Which of the following devices is considered to be the first electrically powered negative pressure ventilator?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The iron lung is considered to be the first electrically powered negative pressure ventilator. It was developed in the 1920s and was widely used during the polio epidemics of the 1930s and 1940s. The Bird, chest cuirass, and rocking bed are all positive pressure ventilators.

Which of the Following Devices Is Considered to Be the First