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A respirometer is a device which is used to measure respiration, where organisms exchange carbon dioxide and oxygen as part of their metabolism.
A Ventilator (also called a Respirator) is a machine that helps a person breathe. 1  A person who has sustained a brain injury may be unable to breathe on his or her own.To use a ventilator, a tube is placed through the personâs mouth to the breathing passage, (trachea, âwindpipeâ). 2  This procedure is called intubation.