Plethysmography, 1974

Plethysmograph_1974

The plethysmograph was identified as being manufactured by Fenyves & Gut by Emanuele Isnardi.  From: Survey of Current Cardiovascular and Respiratory Examination Methods in Medical Selection and Control of Aircrew by A. Scano, NATO Agardograph No. 196, published December 1974, page 75.

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