(n) respirator that produces alternations in air pressure in a chamber surrounding a patient's chest to force air into and out of the lungs thus providing artificial respiration
The Collaborative International Dictionary of English (GCIDE) v.0.53
n. A steel chamber, usually cylindrical, enclosing the entire body of a person except for the head, used to assist respiration for people suffering from disease, especially poliomyelitis. A reciprocating piston at the end causes alternating high and low pressure inside, which forces or assists the breathing of the patient within. [ PJC ]
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