A transducer for recording the instantaneous respiratory waveforms in animals and man.

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Abstract
A simple, inexpensive transducer is described for use in animal experiments or for patient monitoring in which the exact timing of respiratory events is desired. The sensing element is a very fine tungsten wire with negligible thermal time delay. For experiments in which right heart events, e.g., pressure, flow, and heart sounds, are to be correlated with respiratory events and the exact timing of the beginning and end of inspiration and expiration is desired, the tungsten wire transducer would seem superior to other available techniques.

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