Summary
A miniaturized transducer for intravascular measurements of pressure variations has been developed. The probe has an outer diameter of 1·0–1·5 mm. Its frequency response is 0 to more than 200 Hz.* It consists of a sensor in the form of a pneumatic chamber with a mirror wall coupled by light fiber optics to a gallium arsenide diode light source and a silicon diode detector or a phototransistor. Experimental tests on dogs and humans have been made.
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Later developments have extended the range to >15 kHz (Lindström, to be published).
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Lekholm, A., Lindström, L. Optoelectronic transducer for intravascular measurements of pressure variations. Med. & biol. Engng. 7, 333–335 (1969). https://doi.org/10.1007/BF02474776
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DOI: https://doi.org/10.1007/BF02474776